Prerelease 0.33.0-alpha.4

These scripts were originally used to help determine
some of the logic that is now part of the 'attention'
crop strategy in libvips itself.

.circleci/config.yml

@@ -0,0 +1,105 @@
+version: 2.1
+
+workflows:
+  build:
+    jobs:
+      - linux-arm64-glibc-node-18:
+          filters:
+            tags:
+              only: /^v.*/
+      - linux-arm64-musl-node-18:
+          filters:
+            tags:
+              only: /^v.*/
+      - linux-arm64-glibc-node-20:
+          filters:
+            tags:
+              only: /^v.*/
+      - linux-arm64-musl-node-20:
+          filters:
+            tags:
+              only: /^v.*/
+
+jobs:
+  linux-arm64-glibc-node-18:
+    resource_class: arm.medium
+    machine:
+      image: ubuntu-2004:current
+    steps:
+      - checkout
+      - run: |
+          sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
+          sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python3 curl fonts-noto-core"
+          sudo docker exec sharp sh -c "mkdir -p /etc/apt/keyrings"
+          sudo docker exec sharp sh -c "curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg"
+          sudo docker exec sharp sh -c "echo 'deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_18.x nodistro main' | tee /etc/apt/sources.list.d/nodesource.list"
+          sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
+      - run: sudo docker exec sharp sh -c "npm install --build-from-source"
+      - run: sudo docker exec sharp sh -c "npm test"
+      - run: |
+          sudo docker exec sharp sh -c "npm run package-from-local-build"
+          sudo docker exec sharp sh -c "npm pkg set \"optionalDependencies.@sharpen/sharp-linux-arm64=file:./npm/linux-arm64\""
+          sudo docker exec sharp sh -c "npm run clean"
+          sudo docker exec sharp sh -c "npm install --ignore-scripts"
+          sudo docker exec sharp sh -c "npm test"
+      - run: "[[ -n $CIRCLE_TAG ]] && sudo docker exec --env prebuild_upload sharp sh -c \"npx prebuild --upload=$prebuild_upload\" || true"
+  linux-arm64-glibc-node-20:
+    resource_class: arm.medium
+    machine:
+      image: ubuntu-2004:current
+    steps:
+      - checkout
+      - run: |
+          sudo docker run -dit --name sharp --workdir /mnt/sharp arm64v8/debian:bullseye
+          sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python3 curl fonts-noto-core"
+          sudo docker exec sharp sh -c "mkdir -p /etc/apt/keyrings"
+          sudo docker exec sharp sh -c "curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg"
+          sudo docker exec sharp sh -c "echo 'deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_20.x nodistro main' | tee /etc/apt/sources.list.d/nodesource.list"
+          sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
+          sudo docker exec sharp sh -c "mkdir -p /mnt/sharp"
+          sudo docker cp . sharp:/mnt/sharp/.
+      - run: sudo docker exec sharp sh -c "npm install --build-from-source"
+      - run: sudo docker exec sharp sh -c "npm test"
+      - run: |
+          sudo docker exec sharp sh -c "npm run package-from-local-build"
+          sudo docker exec sharp sh -c "npm pkg set \"optionalDependencies.@sharpen/sharp-linux-arm64=file:./npm/linux-arm64\""
+          sudo docker exec sharp sh -c "npm run clean"
+          sudo docker exec sharp sh -c "npm install --ignore-scripts"
+          sudo docker exec sharp sh -c "npm test"
+  linux-arm64-musl-node-18:
+    resource_class: arm.medium
+    machine:
+      image: ubuntu-2004:current
+    steps:
+      - checkout
+      - run: |
+          sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:18-alpine3.17
+          sudo docker exec sharp sh -c "apk add build-base git python3 font-noto --update-cache"
+      - run: sudo docker exec sharp sh -c "npm install --build-from-source"
+      - run: sudo docker exec sharp sh -c "npm test"
+      - run: |
+          sudo docker exec sharp sh -c "npm run package-from-local-build"
+          sudo docker exec sharp sh -c "npm pkg set \"optionalDependencies.@sharpen/sharp-linuxmusl-arm64=file:./npm/linuxmusl-arm64\""
+          sudo docker exec sharp sh -c "npm run clean"
+          sudo docker exec sharp sh -c "npm install --ignore-scripts"
+          sudo docker exec sharp sh -c "npm test"
+      - run: "[[ -n $CIRCLE_TAG ]] && sudo docker exec --env prebuild_upload sharp sh -c \"npx prebuild --upload=$prebuild_upload\" || true"
+  linux-arm64-musl-node-20:
+    resource_class: arm.medium
+    machine:
+      image: ubuntu-2004:current
+    steps:
+      - checkout
+      - run: |
+          sudo docker run -dit --name sharp --workdir /mnt/sharp node:20-alpine3.18
+          sudo docker exec sharp sh -c "apk add build-base git python3 font-noto --update-cache"
+          sudo docker exec sharp sh -c "mkdir -p /mnt/sharp"
+          sudo docker cp . sharp:/mnt/sharp/.
+      - run: sudo docker exec sharp sh -c "npm install --build-from-source"
+      - run: sudo docker exec sharp sh -c "npm test"
+      - run: |
+          sudo docker exec sharp sh -c "npm run package-from-local-build"
+          sudo docker exec sharp sh -c "npm pkg set \"optionalDependencies.@sharpen/sharp-linuxmusl-arm64=file:./npm/linuxmusl-arm64\""
+          sudo docker exec sharp sh -c "npm run clean"
+          sudo docker exec sharp sh -c "npm install --ignore-scripts"
+          sudo docker exec sharp sh -c "npm test"

.cirrus.yml

@@ -1,15 +1,16 @@
 freebsd_instance:
-  image_family: freebsd-13-0-snap
+  image_family: freebsd-13-2
 
 task:
-  name: FreeBSD 13.0
+  name: FreeBSD
   env:
     IGNORE_OSVERSION: yes
+  skip_notifications: true
   prerequisites_script:
     - pkg update -f
     - pkg upgrade -y
-    - pkg install -y pkgconf vips node npm
+    - pkg install -y devel/git devel/pkgconf graphics/vips www/node20 www/npm
   install_script:
-    - npm install --build-from-source --unsafe-perm
+    - npm install --build-from-source
   test_script:
     - npm test

.github/CONTRIBUTING.md

@@ -16,29 +16,30 @@ If a [similar request](https://github.com/lovell/sharp/labels/enhancement) exist
 it's probably fastest to add a comment to it about your requirement.
 
 Implementation is usually straightforward if libvips
-[already supports](https://libvips.github.io/libvips/API/current/func-list.html)
+[already supports](https://www.libvips.org/API/current/func-list.html)
 the feature you need.
 
 ## Submit a Pull Request to fix a bug
 
 Thank you! To prevent the problem occurring again, please add unit tests that would have failed.
 
-Please select the `master` branch as the destination for your Pull Request so your fix can be included in the next minor release.
+Please select the `main` branch as the destination for your Pull Request so your fix can be included in the next minor release.
 
-Please squash your changes into a single commit using a command like `git rebase -i upstream/master`.
+Please squash your changes into a single commit using a command like `git rebase -i upstream/main`.
 
-To test C++ changes, you can compile the module using `npm install` and then run the tests using `npm test`.
+To test C++ changes, you can compile the module using `npm install --build-from-source` and then run the tests using `npm test`.
 
 ## Submit a Pull Request with a new feature
 
-Please add JavaScript [unit tests](https://github.com/lovell/sharp/tree/master/test/unit) to cover your new feature.
+Please add JavaScript [unit tests](https://github.com/lovell/sharp/tree/main/test/unit) to cover your new feature.
 A test coverage report for the JavaScript code is generated in the `coverage/lcov-report` directory.
+Please also update the [TypeScript definitions](https://github.com/lovell/sharp/tree/main/lib/index.d.ts), along with the [type definition tests](https://github.com/lovell/sharp/tree/main/test/types/sharp.test-d.ts).
 
 Where possible, the functional tests use gradient-based perceptual hashes
 based on [dHash](http://www.hackerfactor.com/blog/index.php?/archives/529-Kind-of-Like-That.html)
 to compare expected vs actual images.
 
-You deserve to add your details to the [list of contributors](https://github.com/lovell/sharp/blob/master/package.json#L5).
+You deserve to add your details to the [list of contributors](https://github.com/lovell/sharp/blob/main/package.json#L5).
 
 Any change that modifies the existing public API should be added to the relevant work-in-progress branch for inclusion in the next major release.
 
@@ -93,5 +94,5 @@ Please feel free to ask any questions via a
 [new issue](https://github.com/lovell/sharp/issues/new).
 
 If you're unable to post details publicly, please
-[e-mail](https://github.com/lovell/sharp/blob/master/package.json#L5)
+[e-mail](https://github.com/lovell/sharp/blob/main/package.json#L5)
 for private, paid consulting.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://sharp.pixelplumbing.com/
+    about: Installation instructions, complete API documentation with examples, changelog

.github/ISSUE_TEMPLATE/feature_request.md

@@ -5,12 +5,24 @@ labels: enhancement
 
 ---
 
-What are you trying to achieve?
+## Feature request
 
-Have you searched for similar feature requests?
+### What are you trying to achieve?
 
-What would you expect the API to look like?
+<!-- Please provide context here. -->
 
-What alternatives have you considered?
+### When you searched for similar feature requests, what did you find that might be related?
 
-Is there a sample image that helps explain?
+<!-- Please demonstrate your research here. -->
+
+### What would you expect the API to look like?
+
+<!-- Please provide your suggestions here. -->
+
+### What alternatives have you considered?
+
+<!-- Please provide your ideas here. -->
+
+### Please provide sample image(s) that help explain this feature
+
+<!-- Please provide links to one or more images here. -->

.github/ISSUE_TEMPLATE/installation.md

@@ -5,16 +5,52 @@ labels: installation
 
 ---
 
-Did you see the [documentation relating to installation](https://sharp.pixelplumbing.com/install)?
+<!-- Please try to answer as many of these questions as possible. -->
 
-Have you ensured the architecture and platform of Node.js used for `npm install` is the same as the architecture and platform of Node.js used at runtime?
+## Possible install-time or require-time problem
 
-Are you using the latest version? Is the version currently in use as reported by `npm ls sharp` the same as the latest version as reported by `npm view sharp dist-tags.latest`?
+<!-- Please place an [x] in the box to confirm. -->
 
-If you are installing as a `root` or `sudo` user, have you tried with the `npm install --unsafe-perm` flag?
+- [ ] I have read the [documentation relating to installation](https://sharp.pixelplumbing.com/install).
 
-If you are using the `ignore-scripts` feature of `npm`, have you tried with the `npm install --ignore-scripts=false` flag?
+### Are you using the latest version of sharp?
 
-What is the complete output of running `npm install --verbose sharp`? Have you checked this output for useful error messages?
+<!-- Please place an [x] in the box to confirm. -->
 
-What is the output of running `npx envinfo --binaries --system`?
+- [ ] I am using the latest version of `sharp` as reported by `npm view sharp dist-tags.latest`.
+
+If you cannot confirm this, please upgrade to the latest version and try again before opening an issue.
+
+If you are using another package which depends on a version of `sharp` that is not the latest, please open an issue against that package instead.
+
+### Are you using a supported runtime?
+
+<!-- Please place an [x] in the relevant box to confirm. -->
+
+- [ ] I am using Node.js 18 with a version >= 18.17.0
+- [ ] I am using Node.js 20 with a version >= 20.3.0
+- [ ] I am using Node.js 21 or later
+
+If you cannot confirm any of these, please upgrade to the latest version and try again before opening an issue.
+
+### Are you using a supported package manager?
+
+<!-- Please place an [x] in the relevant box to confirm. -->
+
+- [ ] I am using npm >= 9.6.5
+- [ ] I am using yarn >= 3.2.0
+- [ ] I am using pnpm >= 7.1.0
+
+If you cannot confirm any of these, please upgrade to the latest version and try again before opening an issue.
+
+### What is the complete output of running `npm install --verbose --foreground-scripts sharp` in an empty directory?
+
+<details>
+
+<!-- Please provide output of `npm install --verbose --foreground-scripts sharp` in an empty directory here. -->
+
+</details>
+
+### What is the output of running `npx envinfo --binaries --system --npmPackages=sharp --npmGlobalPackages=sharp`?
+
+<!-- Please provide output of `npx envinfo --binaries --system --npmPackages=sharp --npmGlobalPackages=sharp` here. -->

.github/ISSUE_TEMPLATE/possible-bug.md

@@ -7,14 +7,43 @@ labels: triage
 
 <!-- If this issue relates to installation, please use https://github.com/lovell/sharp/issues/new?labels=installation&template=installation.md instead. -->
 
-Are you using the latest version? Is the version currently in use as reported by `npm ls sharp` the same as the latest version as reported by `npm view sharp dist-tags.latest`?
+## Possible bug
 
-What are the steps to reproduce?
+### Is this a possible bug in a feature of sharp, unrelated to installation?
 
-What is the expected behaviour?
+<!-- Please place an [x] in the box to confirm. -->
 
-Are you able to provide a minimal, standalone code sample, without other dependencies, that demonstrates this problem?
+- [ ] Running `npm install sharp` completes without error.
+- [ ] Running `node -e "require('sharp')"` completes without error.
 
-Are you able to provide a sample image that helps explain the problem?
+If you cannot confirm both of these, please open an [installation issue](https://github.com/lovell/sharp/issues/new?labels=installation&template=installation.md) instead.
 
-What is the output of running `npx envinfo --binaries --system`?
+### Are you using the latest version of sharp?
+
+<!-- Please place an [x] in the box to confirm. -->
+
+- [ ] I am using the latest version of `sharp` as reported by `npm view sharp dist-tags.latest`.
+
+If you cannot confirm this, please upgrade to the latest version and try again before opening an issue.
+
+If you are using another package which depends on a version of `sharp` that is not the latest, please open an issue against that package instead.
+
+### What is the output of running `npx envinfo --binaries --system --npmPackages=sharp --npmGlobalPackages=sharp`?
+
+<!-- Please provide output of the above command here. -->
+
+### What are the steps to reproduce?
+
+<!-- Please enter steps to reproduce here. -->
+
+### What is the expected behaviour?
+
+<!-- Please enter the expected behaviour here. -->
+
+### Please provide a minimal, standalone code sample, without other dependencies, that demonstrates this problem
+
+<!-- Please provide either formatted code or a link to a repo/gist that allows someone else to reproduce here. -->
+
+### Please provide sample image(s) that help explain this problem
+
+<!-- Please provide links to one or more images here. -->

.github/ISSUE_TEMPLATE/question.md

@@ -7,10 +7,20 @@ labels: question
 
 <!-- If this issue relates to installation, please use https://github.com/lovell/sharp/issues/new?labels=installation&template=installation.md instead. -->
 
-What are you trying to achieve?
+## Question about an existing feature
 
-Have you searched for similar questions?
+### What are you trying to achieve?
 
-Are you able to provide a minimal, standalone code sample that demonstrates this question?
+<!-- Please provide context here. -->
 
-Are you able to provide a sample image that helps explain the question?
+### When you searched for similar issues, what did you find that might be related?
+
+<!-- Please demonstrate your research here. -->
+
+### Please provide a minimal, standalone code sample, without other dependencies, that demonstrates this question
+
+<!-- Please provide either formatted code or a link to a repo/gist that helps someone else understand here. -->
+
+### Please provide sample image(s) that help explain this question
+
+<!-- Please provide links to one or more images here. -->

.github/SECURITY.md

@@ -0,0 +1,18 @@
+# Security Policy
+
+## Supported Versions
+
+The latest version of `sharp` as published to npm
+and reported by `npm view sharp dist-tags.latest`
+is supported with security updates.
+
+## Reporting a Vulnerability
+
+Please use
+[e-mail](https://github.com/lovell/sharp/blob/main/package.json#L5)
+to report a vulnerability.
+
+You can expect a response within 48 hours
+if you are a human reporting a genuine issue.
+
+Thank you in advance.

.github/workflows/ci.yml

@@ -0,0 +1,190 @@
+name: CI
+on:
+  - push
+  - pull_request
+permissions: {}
+jobs:
+  github-runner:
+    permissions:
+      contents: write
+    name: ${{ matrix.platform }} - Node.js ${{ matrix.nodejs_version_major }} ${{ matrix.prebuild && '- prebuild' }}
+    runs-on: ${{ matrix.os }}
+    container: ${{ matrix.container }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-22.04
+            container: rockylinux:8
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: linux-x64
+            prebuild: true
+          - os: ubuntu-22.04
+            container: rockylinux:8
+            nodejs_version: "^20.3.0"
+            nodejs_version_major: 20
+            platform: linux-x64
+          - os: ubuntu-22.04
+            container: node:18-alpine3.17
+            nodejs_version_major: 18
+            platform: linuxmusl-x64
+            prebuild: true
+          - os: ubuntu-22.04
+            container: node:20-alpine3.18
+            nodejs_version_major: 20
+            platform: linuxmusl-x64
+          - os: macos-11
+            nodejs_arch: x64
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: darwin-x64
+            prebuild: true
+          - os: macos-11
+            nodejs_arch: x64
+            nodejs_version: "^20.3.0"
+            nodejs_version_major: 20
+            platform: darwin-x64
+          - os: windows-2019
+            nodejs_arch: x86
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: win32-ia32
+            prebuild: true
+          - os: windows-2019
+            nodejs_arch: x86
+            nodejs_version: "^20.3.0"
+            nodejs_version_major: 20
+            platform: win32-ia32
+          - os: windows-2019
+            nodejs_arch: x64
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: win32-x64
+            prebuild: true
+          - os: windows-2019
+            nodejs_arch: x64
+            nodejs_version: "^20.3.0"
+            nodejs_version_major: 20
+            platform: win32-x64
+    steps:
+      - name: Dependencies (Linux glibc)
+        if: contains(matrix.container, 'centos')
+        run: |
+          yum install -y https://rpm.nodesource.com/pub_${{ matrix.nodejs_version_major }}.x/nodistro/repo/nodesource-release-nodistro-1.noarch.rpm
+          yum install -y https://packages.endpointdev.com/rhel/7/os/x86_64/endpoint-repo.x86_64.rpm
+          yum install -y centos-release-scl
+          yum install -y devtoolset-11-gcc-c++ make git python3 nodejs fontconfig google-noto-sans-fonts
+          echo "/opt/rh/devtoolset-11/root/usr/bin" >> $GITHUB_PATH
+      - name: Dependencies (Rocky Linux glibc)
+        if: contains(matrix.container, 'rockylinux')
+        run: |
+          dnf install -y https://rpm.nodesource.com/pub_${{ matrix.nodejs_version_major }}.x/nodistro/repo/nodesource-release-nodistro-1.noarch.rpm
+          dnf install -y --setopt=nodesource-nodejs.module_hotfixes=1 nodejs
+          dnf install -y gcc-toolset-11-gcc-c++ make git python3 fontconfig google-noto-sans-fonts
+          echo "/opt/rh/gcc-toolset-11/root/usr/bin" >> $GITHUB_PATH
+      - name: Dependencies (Linux musl)
+        if: contains(matrix.container, 'alpine')
+        run: apk add build-base git python3 font-noto --update-cache
+      - name: Dependencies (Python 3.11 - macOS, Windows)
+        if: contains(matrix.os, 'macos') || contains(matrix.os, 'windows')
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+      - name: Dependencies (Node.js - macOS, Windows)
+        if: contains(matrix.os, 'macos') || contains(matrix.os, 'windows')
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.nodejs_version }}
+          architecture: ${{ matrix.nodejs_arch }}
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install
+        run: npm install --build-from-source
+      - name: Test
+        run: npm test
+      - name: Test packaging
+        run: |
+          npm run package-from-local-build
+          npm pkg set "optionalDependencies.@sharpen/sharp-${{ matrix.platform }}=file:./npm/${{ matrix.platform }}"
+          npm run clean
+          npm install --ignore-scripts
+          npm test
+      - name: Prebuild
+        if: matrix.prebuild && startsWith(github.ref, 'refs/tags/')
+        env:
+          prebuild_upload: ${{ secrets.GITHUB_TOKEN }}
+        run: npx prebuild
+  github-runner-qemu:
+    permissions:
+      contents: write
+    name: linux-arm - Node.js 18 - prebuild
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: uraimo/run-on-arch-action@v2
+        with:
+          arch: armv6
+          distro: buster
+          env: |
+            nodejs_version: "18.17.0"
+            prebuild_upload: "${{ startsWith(github.ref, 'refs/tags/') && secrets.GITHUB_TOKEN || '' }}"
+          run: |
+            apt-get update
+            apt-get install -y fontconfig fonts-noto-core g++ git libatomic1 make python3 xz-utils
+            mkdir /opt/nodejs
+            curl --silent https://unofficial-builds.nodejs.org/download/release/v${nodejs_version}/node-v${nodejs_version}-linux-armv6l.tar.xz | tar xJC /opt/nodejs --strip-components=1
+            export PATH=$PATH:/opt/nodejs/bin
+            npm install --build-from-source
+            npx mocha --no-config --spec=test/unit/io.js
+            npm run package-from-local-build
+            npm pkg set "optionalDependencies.@sharpen/sharp-linux-arm=file:./npm/linux-arm"
+            npm run clean
+            npm install --ignore-scripts
+            npx mocha --no-config --spec=test/unit/io.js --timeout=30000
+            [[ -n $prebuild_upload ]] && npx prebuild || true
+  macstadium-runner:
+    permissions:
+      contents: write
+    name: ${{ matrix.platform }} - Node.js ${{ matrix.nodejs_version_major }} ${{ matrix.prebuild && '- prebuild' }}
+    runs-on: macos-m1
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - nodejs_arch: x64
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: darwin-x64
+          - nodejs_arch: arm64
+            nodejs_version: "^18.17.0"
+            nodejs_version_major: 18
+            platform: darwin-arm64
+            prebuild: true
+    defaults:
+      run:
+        shell: /usr/bin/arch -arch arm64e /bin/bash -l {0}
+    steps:
+      - name: Dependencies (Node.js)
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.nodejs_version }}
+          architecture: ${{ matrix.nodejs_arch }}
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install
+        run: npm install --build-from-source
+      - name: Test
+        run: npm test
+      - name: Test packaging
+        run: |
+          npm run package-from-local-build
+          npm pkg set "optionalDependencies.@sharpen/sharp-${{ matrix.platform }}=file:./npm/${{ matrix.platform }}"
+          npm run clean
+          npm install --ignore-scripts
+          npm test
+      - name: Prebuild
+        if: matrix.prebuild && startsWith(github.ref, 'refs/tags/')
+        env:
+          prebuild_upload: ${{ secrets.GITHUB_TOKEN }}
+        run: npx prebuild

.gitignore

@@ -1,14 +1,16 @@
 build
 node_modules
 /coverage
+npm/*/*
+!npm/*/package.json
 test/bench/node_modules
 test/fixtures/output*
+test/fixtures/vips-properties.xml
 test/leak/libvips.supp
 test/saliency/report.json
 test/saliency/Image*
 test/saliency/[Uu]serData*
 !test/saliency/userData.js
-vendor
 .gitattributes
 .DS_Store
 .nyc_output

.mocharc.jsonc

@@ -0,0 +1,7 @@
+{
+  "parallel": true,
+  "slow": 1000,
+  "timeout": 30000,
+  "require": "./test/beforeEach.js",
+  "spec": "./test/unit/*.js"
+}

.prebuildrc

@@ -1,4 +1,6 @@
 {
-  "include-regex": "(sharp\\.node|libvips-cpp\\.dll)",
+  "runtime": "napi",
+  "include-regex": "(sharp-.+\\.node|libvips-.+\\.dll|libglib-.+\\.dll|libgobject-.+\\.dll)",
+  "prerelease": true,
   "strip": true
 }

.travis.yml

@@ -1,189 +0,0 @@
-jobs:
-  include:
-    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 10"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
-        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_10.x | bash -"
-        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
-      install: sudo docker exec sharp bash -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp bash -c "npm test"
-
-    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 12"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
-        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_12.x | bash -"
-        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
-      install: sudo docker exec sharp bash -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp bash -c "npm test"
-
-    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 14"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
-        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_14.x | bash -"
-        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
-      install: sudo docker exec sharp bash -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp bash -c "npm test"
-
-    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 15"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo chown 0.0 ${PWD}
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
-        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_15.x | bash -"
-        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
-      install: sudo docker exec sharp bash -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp bash -c "npm test"
-
-    - name: "Linux x64 (Alpine 3.9, musl 1.1.20) - Node.js 10"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:10.17.0-alpine3.9 # https://github.com/nodejs/docker-node/issues/1158
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux x64 (Alpine 3.11, musl 1.1.20) - Node.js 12"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:12.0-alpine
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux x64 (Alpine 3.11, musl 1.1.20) - Node.js 14"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:14.0-alpine
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux x64 (Alpine 3.11, musl 1.1.20) - Node.js 15"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo chown 0.0 ${PWD}
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:15.0-alpine
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 10"
-      arch: arm64
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
-        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
-        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_10.x sid main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs=10.*"
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 12"
-      arch: arm64
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
-        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
-        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_12.x sid main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 14"
-      arch: arm64
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
-        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
-        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_14.x sid main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 15"
-      arch: arm64
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo chown 0.0 ${PWD}
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
-        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
-        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_15.x sid main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
-      install: sudo docker exec sharp sh -c "npm install --build-from-source --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
-    - name: "macOS (10.13) - Node.js 10"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "10"
-      install: npm install --build-from-source
-
-    - name: "macOS (10.13) - Node.js 12"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "12"
-      before_install: unset prebuild_upload
-      install: npm install --build-from-source
-
-    - name: "macOS (10.13) - Node.js 14"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "14"
-      before_install: unset prebuild_upload
-      install: npm install --build-from-source
-
-    - name: "macOS (10.13) - Node.js 15"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "15"
-      before_install: unset prebuild_upload
-      install: npm install --build-from-source
-
-    - name: "Unit test coverage report"
-      os: linux
-      dist: bionic
-      language: node_js
-      node_js: "14"
-      before_install: unset prebuild_upload
-      install: npm install --build-from-source
-      after_success:
-        - npm install coveralls
-        - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
-
-cache:
-  npm: false

README.md

@@ -1,10 +1,10 @@
 # sharp
 
-<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@master/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
+<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
 
 The typical use case for this high speed Node.js module
 is to convert large images in common formats to
-smaller, web-friendly JPEG, PNG and WebP images of varying dimensions.
+smaller, web-friendly JPEG, PNG, WebP, GIF and AVIF images of varying dimensions.
 
 Resizing an image is typically 4x-5x faster than using the
 quickest ImageMagick and GraphicsMagick settings
@@ -16,9 +16,17 @@ Lanczos resampling ensures quality is not sacrificed for speed.
 As well as image resizing, operations such as
 rotation, extraction, compositing and gamma correction are available.
 
-Most modern macOS, Windows and Linux systems running Node.js v10+
+Most modern macOS, Windows and Linux systems running Node.js >= 18.17.0
 do not require any additional install or runtime dependencies.
 
+## Documentation
+
+Visit [sharp.pixelplumbing.com](https://sharp.pixelplumbing.com/) for complete
+[installation instructions](https://sharp.pixelplumbing.com/install),
+[API documentation](https://sharp.pixelplumbing.com/api-constructor),
+[benchmark tests](https://sharp.pixelplumbing.com/performance) and
+[changelog](https://sharp.pixelplumbing.com/changelog).
+
 ## Examples
 
 ```sh
@@ -43,6 +51,7 @@ sharp(inputBuffer)
 sharp('input.jpg')
   .rotate()
   .resize(200)
+  .jpeg({ mozjpeg: true })
   .toBuffer()
   .then( data => { ... })
   .catch( err => { ... });
@@ -84,25 +93,14 @@ readableStream
   .pipe(writableStream);
 ```
 
-[![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.svg?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
-[![N-API v3](https://img.shields.io/badge/N--API-v3-green.svg)](https://nodejs.org/dist/latest/docs/api/n-api.html#n_api_n_api_version_matrix)
+## Contributing
 
-### Documentation
-
-Visit [sharp.pixelplumbing.com](https://sharp.pixelplumbing.com/) for complete
-[installation instructions](https://sharp.pixelplumbing.com/install),
-[API documentation](https://sharp.pixelplumbing.com/api-constructor),
-[benchmark tests](https://sharp.pixelplumbing.com/performance) and
-[changelog](https://sharp.pixelplumbing.com/changelog).
-
-### Contributing
-
-A [guide for contributors](https://github.com/lovell/sharp/blob/master/.github/CONTRIBUTING.md)
+A [guide for contributors](https://github.com/lovell/sharp/blob/main/.github/CONTRIBUTING.md)
 covers reporting bugs, requesting features and submitting code changes.
 
-### Licensing
+## Licensing
 
-Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
+Copyright 2013 Lovell Fuller and others.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

appveyor.yml

@@ -1,32 +0,0 @@
-os: Visual Studio 2019
-version: "{build}"
-build: off
-environment:
-  matrix:
-  - nodejs_version: "10"
-    platform: x86
-  - nodejs_version: "10"
-    platform: x64
-  - nodejs_version: "12"
-    platform: x86
-    prebuild_upload: ""
-  - nodejs_version: "12"
-    platform: x64
-    prebuild_upload: ""
-  - nodejs_version: "14.2.0"
-    platform: x86
-    prebuild_upload: ""
-  - nodejs_version: "14"
-    platform: x64
-    prebuild_upload: ""
-  - nodejs_version: "15"
-    platform: x86
-    prebuild_upload: ""
-  - nodejs_version: "15"
-    platform: x64
-    prebuild_upload: ""
-install:
-  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:platform
-  - npm install --build-from-source
-test_script:
-  - npm test

binding.gyp

@@ -1,7 +1,13 @@
+# Copyright 2013 Lovell Fuller and others.
+# SPDX-License-Identifier: Apache-2.0
+
 {
   'variables': {
     'vips_version': '<!(node -p "require(\'./lib/libvips\').minimumLibvipsVersion")',
-    'sharp_vendor_dir': '<(module_root_dir)/vendor/<(vips_version)'
+    'platform_and_arch': '<!(node -p "require(\'./lib/libvips\').buildPlatformArch()")',
+    'sharp_libvips_include_dir': '<!(node -p "require(\'./lib/libvips\').buildSharpLibvipsIncludeDir()")',
+    'sharp_libvips_cplusplus_dir': '<!(node -p "require(\'./lib/libvips\').buildSharpLibvipsCPlusPlusDir()")',
+    'sharp_libvips_lib_dir': '<!(node -p "require(\'./lib/libvips\').buildSharpLibvipsLibDir()")'
   },
   'targets': [{
     'target_name': 'libvips-cpp',
@@ -14,18 +20,19 @@
           '_ALLOW_KEYWORD_MACROS'
         ],
         'sources': [
-          'src/libvips/cplusplus/VError.cpp',
-          'src/libvips/cplusplus/VConnection.cpp',
-          'src/libvips/cplusplus/VInterpolate.cpp',
-          'src/libvips/cplusplus/VImage.cpp'
+          '<(sharp_libvips_cplusplus_dir)/VConnection.cpp',
+          '<(sharp_libvips_cplusplus_dir)/VError.cpp',
+          '<(sharp_libvips_cplusplus_dir)/VImage.cpp',
+          '<(sharp_libvips_cplusplus_dir)/VInterpolate.cpp',
+          '<(sharp_libvips_cplusplus_dir)/VRegion.cpp'
         ],
         'include_dirs': [
-          '<(sharp_vendor_dir)/include',
-          '<(sharp_vendor_dir)/include/glib-2.0',
-          '<(sharp_vendor_dir)/lib/glib-2.0/include'
+          '<(sharp_libvips_include_dir)',
+          '<(sharp_libvips_include_dir)/glib-2.0',
+          '<(sharp_libvips_lib_dir)/glib-2.0/include'
         ],
         'link_settings': {
-          'library_dirs': ['<(sharp_vendor_dir)/lib'],
+          'library_dirs': ['<(sharp_libvips_lib_dir)'],
           'libraries': [
             'libvips.lib',
             'libglib-2.0.lib',
@@ -37,6 +44,7 @@
             'msvs_settings': {
               'VCCLCompilerTool': {
                 'ExceptionHandling': 1,
+                'Optimization': 1,
                 'WholeProgramOptimization': 'true'
               },
               'VCLibrarianTool': {
@@ -65,16 +73,17 @@
       }]
     ]
   }, {
-    'target_name': 'sharp',
+    'target_name': 'sharp-<(platform_and_arch)',
     'defines': [
-      'NAPI_VERSION=3'
+      'NAPI_VERSION=9',
+      'NODE_ADDON_API_DISABLE_DEPRECATED',
+      'NODE_API_SWALLOW_UNTHROWABLE_EXCEPTIONS'
     ],
     'dependencies': [
       '<!(node -p "require(\'node-addon-api\').gyp")',
       'libvips-cpp'
     ],
     'variables': {
-      'runtime_link%': 'shared',
       'conditions': [
         ['OS != "win"', {
           'pkg_config_path': '<!(node -p "require(\'./lib/libvips\').pkgConfigPath()")',
@@ -101,12 +110,8 @@
       ['use_global_libvips == "true"', {
         # Use pkg-config for include and lib
         'include_dirs': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --cflags-only-I vips-cpp vips glib-2.0 | sed s\/-I//g)'],
+        'libraries': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --libs vips-cpp)'],
         'conditions': [
-          ['runtime_link == "static"', {
-            'libraries': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --libs --static vips-cpp)']
-          }, {
-            'libraries': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --libs vips-cpp)']
-          }],
           ['OS == "linux"', {
             'defines': [
               # Inspect libvips-cpp.so to determine which C++11 ABI version was used and set _GLIBCXX_USE_CXX11_ABI accordingly. This is quite horrible.
@@ -117,9 +122,9 @@
       }, {
         # Use pre-built libvips stored locally within node_modules
         'include_dirs': [
-          '<(sharp_vendor_dir)/include',
-          '<(sharp_vendor_dir)/include/glib-2.0',
-          '<(sharp_vendor_dir)/lib/glib-2.0/include'
+          '<(sharp_libvips_include_dir)',
+          '<(sharp_libvips_include_dir)/glib-2.0',
+          '<(sharp_libvips_lib_dir)/glib-2.0/include'
         ],
         'conditions': [
           ['OS == "win"', {
@@ -128,7 +133,7 @@
               '_FILE_OFFSET_BITS=64'
             ],
             'link_settings': {
-              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'library_dirs': ['<(sharp_libvips_lib_dir)'],
               'libraries': [
                 'libvips.lib',
                 'libglib-2.0.lib',
@@ -138,32 +143,40 @@
           }],
           ['OS == "mac"', {
             'link_settings': {
-              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'library_dirs': [
+                '<(sharp_libvips_lib_dir)'
+              ],
               'libraries': [
-                'libvips-cpp.42.dylib',
-                'libvips.42.dylib'
+                'libvips-cpp.42.dylib'
               ]
             },
             'xcode_settings': {
               'OTHER_LDFLAGS': [
                 # Ensure runtime linking is relative to sharp.node
-                '-Wl,-rpath,\'@loader_path/../../vendor/<(vips_version)/lib\''
+                '-Wl,-rpath,\'@loader_path/../../sharp-libvips-<(platform_and_arch)/lib\'',
+                '-Wl,-rpath,\'@loader_path/../../node_modules/@sharpen/sharp-libvips-<(platform_and_arch)/lib\'',
+                '-Wl,-rpath,\'@loader_path/../../../node_modules/@sharpen/sharp-libvips-<(platform_and_arch)/lib\''
               ]
             }
           }],
           ['OS == "linux"', {
             'defines': [
-              '_GLIBCXX_USE_CXX11_ABI=0'
+              '_GLIBCXX_USE_CXX11_ABI=1'
             ],
             'link_settings': {
-              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'library_dirs': [
+                '<(sharp_libvips_lib_dir)'
+              ],
               'libraries': [
-                '-l:libvips-cpp.so.42',
-                '-l:libvips.so.42'
+                '-l:libvips-cpp.so.42'
               ],
               'ldflags': [
                 # Ensure runtime linking is relative to sharp.node
-                '-Wl,-s -Wl,--disable-new-dtags -Wl,-rpath=\'$$ORIGIN/../../vendor/<(vips_version)/lib\''
+                '-Wl,-s',
+                '-Wl,--disable-new-dtags',
+                '-Wl,-rpath=\'$$ORIGIN/../../sharp-libvips-<(platform_and_arch)/lib\'',
+                '-Wl,-rpath=\'$$ORIGIN/../../node_modules/@sharpen/sharp-libvips-<(platform_and_arch)/lib\'',
+                '-Wl,-rpath=\'$$ORIGIN/../../../node_modules/@sharpen/sharp-libvips-<(platform_and_arch)/lib\''
               ]
             }
           }]
@@ -174,17 +187,17 @@
       '-std=c++0x',
       '-fexceptions',
       '-Wall',
-      '-O3'
+      '-Os'
     ],
     'xcode_settings': {
       'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',
-      'MACOSX_DEPLOYMENT_TARGET': '10.9',
+      'MACOSX_DEPLOYMENT_TARGET': '10.13',
       'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
       'GCC_ENABLE_CPP_RTTI': 'YES',
       'OTHER_CPLUSPLUSFLAGS': [
         '-fexceptions',
         '-Wall',
-        '-O3'
+        '-Oz'
       ]
     },
     'configurations': {
@@ -204,6 +217,7 @@
             'msvs_settings': {
               'VCCLCompilerTool': {
                 'ExceptionHandling': 1,
+                'Optimization': 1,
                 'WholeProgramOptimization': 'true'
               },
               'VCLibrarianTool': {
@@ -228,5 +242,23 @@
         ]
       }
     },
+  }, {
+    'target_name': 'copy-dll',
+    'type': 'none',
+    'dependencies': [
+      'sharp-<(platform_and_arch)'
+    ],
+    'conditions': [
+      ['OS == "win"', {
+        'copies': [{
+          'destination': 'build/Release',
+          'files': [
+            '<(sharp_libvips_lib_dir)/libvips-42.dll',
+            '<(sharp_libvips_lib_dir)/libglib-2.0-0.dll',
+            '<(sharp_libvips_lib_dir)/libgobject-2.0-0.dll'
+          ]
+        }]
+      }]
+    ]
   }]
 }

docs/README.md

@@ -1,10 +1,10 @@
 # sharp
 
-<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@master/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
+<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/sharp-logo.svg" width="160" height="160" alt="sharp logo" align="right">
 
 The typical use case for this high speed Node.js module
 is to convert large images in common formats to
-smaller, web-friendly JPEG, PNG and WebP images of varying dimensions.
+smaller, web-friendly JPEG, PNG, WebP, GIF and AVIF images of varying dimensions.
 
 Resizing an image is typically 4x-5x faster than using the
 quickest ImageMagick and GraphicsMagick settings
@@ -16,14 +16,14 @@ Lanczos resampling ensures quality is not sacrificed for speed.
 As well as image resizing, operations such as
 rotation, extraction, compositing and gamma correction are available.
 
-Most modern macOS, Windows and Linux systems running Node.js v10+
+Most modern macOS, Windows and Linux systems running Node.js >= 14.15.0
 do not require any additional install or runtime dependencies.
 
 ### Formats
 
-This module supports reading JPEG, PNG, WebP, TIFF, GIF and SVG images.
+This module supports reading JPEG, PNG, WebP, GIF, AVIF, TIFF and SVG images.
 
-Output images can be in JPEG, PNG, WebP and TIFF formats as well as uncompressed raw pixel data.
+Output images can be in JPEG, PNG, WebP, GIF, AVIF and TIFF formats as well as uncompressed raw pixel data.
 
 Streams, Buffer objects and the filesystem can be used for input and output.
 
@@ -50,6 +50,10 @@ no child processes are spawned and Promises/async/await are supported.
 
 ### Optimal
 
+The features of `mozjpeg` and `pngquant` can be used
+to optimise the file size of JPEG and PNG images respectively,
+without having to invoke separate `imagemin` processes.
+
 Huffman tables are optimised when generating JPEG output images
 without having to use separate command line tools like
 [jpegoptim](https://github.com/tjko/jpegoptim) and
@@ -59,14 +63,18 @@ PNG filtering is disabled by default,
 which for diagrams and line art often produces the same result
 as [pngcrush](https://pmt.sourceforge.io/pngcrush/).
 
+The file size of animated GIF output is optimised
+without having to use separate command line tools such as
+[gifsicle](https://www.lcdf.org/gifsicle/).
+
 ### Contributing
 
-A [guide for contributors](https://github.com/lovell/sharp/blob/master/.github/CONTRIBUTING.md)
+A [guide for contributors](https://github.com/lovell/sharp/blob/main/.github/CONTRIBUTING.md)
 covers reporting bugs, requesting features and submitting code changes.
 
 ### Licensing
 
-Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
+Copyright 2013 Lovell Fuller and others.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

docs/api-channel.md

@@ -1,12 +1,13 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## removeAlpha
+> removeAlpha() ⇒ <code>Sharp</code>
 
 Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.
 
-### Examples
+See also [flatten](/api-operation#flatten).
 
-```javascript
+
+**Example**  
+```js
 sharp('rgba.png')
   .removeAlpha()
   .toFile('rgb.png', function(err, info) {
@@ -14,86 +15,117 @@ sharp('rgba.png')
   });
 ```
 
-Returns **Sharp** 
 
 ## ensureAlpha
+> ensureAlpha([alpha]) ⇒ <code>Sharp</code>
 
-Ensure alpha channel, if missing. The added alpha channel will be fully opaque. This is a no-op if the image already has an alpha channel.
+Ensure the output image has an alpha transparency channel.
+If missing, the added alpha channel will have the specified
+transparency level, defaulting to fully-opaque (1).
+This is a no-op if the image already has an alpha channel.
 
-### Examples
 
-```javascript
-sharp('rgb.jpg')
+**Throws**:
+
+- <code>Error</code> Invalid alpha transparency level
+
+**Since**: 0.21.2  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [alpha] | <code>number</code> | <code>1</code> | alpha transparency level (0=fully-transparent, 1=fully-opaque) |
+
+**Example**  
+```js
+// rgba.png will be a 4 channel image with a fully-opaque alpha channel
+await sharp('rgb.jpg')
   .ensureAlpha()
-  .toFile('rgba.png', function(err, info) {
-    // rgba.png is a 4 channel image with a fully opaque alpha channel
-  });
+  .toFile('rgba.png')
+```
+**Example**  
+```js
+// rgba is a 4 channel image with a fully-transparent alpha channel
+const rgba = await sharp(rgb)
+  .ensureAlpha(0)
+  .toBuffer();
 ```
 
-Returns **Sharp** 
-
-**Meta**
-
--   **since**: 0.21.2
 
 ## extractChannel
+> extractChannel(channel) ⇒ <code>Sharp</code>
 
 Extract a single channel from a multi-channel image.
 
-### Parameters
 
--   `channel` **([number][1] \| [string][2])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid channel
 
-```javascript
-sharp(input)
+
+| Param | Type | Description |
+| --- | --- | --- |
+| channel | <code>number</code> \| <code>string</code> | zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`. |
+
+**Example**  
+```js
+// green.jpg is a greyscale image containing the green channel of the input
+await sharp(input)
   .extractChannel('green')
-  .toColourspace('b-w')
-  .toFile('green.jpg', function(err, info) {
-    // info.channels === 1
-    // green.jpg is a greyscale image containing the green channel of the input
-   });
+  .toFile('green.jpg');
+```
+**Example**  
+```js
+// red1 is the red value of the first pixel, red2 the second pixel etc.
+const [red1, red2, ...] = await sharp(input)
+  .extractChannel(0)
+  .raw()
+  .toBuffer();
 ```
 
--   Throws **[Error][3]** Invalid channel
-
-Returns **Sharp** 
 
 ## joinChannel
+> joinChannel(images, options) ⇒ <code>Sharp</code>
 
 Join one or more channels to the image.
 The meaning of the added channels depends on the output colourspace, set with `toColourspace()`.
 By default the output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.
 Channel ordering follows vips convention:
+- sRGB: 0: Red, 1: Green, 2: Blue, 3: Alpha.
+- CMYK: 0: Magenta, 1: Cyan, 2: Yellow, 3: Black, 4: Alpha.
 
--   sRGB: 0: Red, 1: Green, 2: Blue, 3: Alpha.
--   CMYK: 0: Magenta, 1: Cyan, 2: Yellow, 3: Black, 4: Alpha.
-
-Buffers may be any of the image formats supported by sharp: JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data.
+Buffers may be any of the image formats supported by sharp.
 For raw pixel input, the `options` object should contain a `raw` attribute, which follows the format of the attribute of the same name in the `sharp()` constructor.
 
-### Parameters
 
--   `images` **([Array][4]&lt;([string][2] \| [Buffer][5])> | [string][2] \| [Buffer][5])** one or more images (file paths, Buffers).
--   `options` **[Object][6]** image options, see `sharp()` constructor.
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][3]** Invalid parameters
+| Param | Type | Description |
+| --- | --- | --- |
+| images | <code>Array.&lt;(string\|Buffer)&gt;</code> \| <code>string</code> \| <code>Buffer</code> | one or more images (file paths, Buffers). |
+| options | <code>Object</code> | image options, see `sharp()` constructor. |
+
 
-Returns **Sharp** 
 
 ## bandbool
+> bandbool(boolOp) ⇒ <code>Sharp</code>
 
 Perform a bitwise boolean operation on all input image channels (bands) to produce a single channel output image.
 
-### Parameters
 
--   `boolOp` **[string][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Description |
+| --- | --- | --- |
+| boolOp | <code>string</code> | one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively. |
+
+**Example**  
+```js
 sharp('3-channel-rgb-input.png')
   .bandbool(sharp.bool.and)
   .toFile('1-channel-output.png', function (err, info) {
@@ -101,20 +133,4 @@ sharp('3-channel-rgb-input.png')
     // If `I(1,1) = [247, 170, 14] = [0b11110111, 0b10101010, 0b00001111]`
     // then `O(1,1) = 0b11110111 & 0b10101010 & 0b00001111 = 0b00000010 = 2`.
   });
-```
-
--   Throws **[Error][3]** Invalid parameters
-
-Returns **Sharp** 
-
-[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
-
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
-
-[5]: https://nodejs.org/api/buffer.html
-
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
+```

docs/api-colour.md

@@ -1,20 +1,29 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## tint
+> tint(rgb) ⇒ <code>Sharp</code>
 
 Tint the image using the provided chroma while preserving the image luminance.
 An alpha channel may be present and will be unchanged by the operation.
 
-### Parameters
 
--   `rgb` **([string][1] \| [Object][2])** parsed by the [color][3] module to extract chroma values.
+**Throws**:
+
+- <code>Error</code> Invalid parameter
 
 
--   Throws **[Error][4]** Invalid parameter
+| Param | Type | Description |
+| --- | --- | --- |
+| rgb | <code>string</code> \| <code>Object</code> | parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values. |
+
+**Example**  
+```js
+const output = await sharp(input)
+  .tint({ r: 255, g: 240, b: 16 })
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## greyscale
+> greyscale([greyscale]) ⇒ <code>Sharp</code>
 
 Convert to 8-bit greyscale; 256 shades of grey.
 This is a linear operation. If the input image is in a non-linear colour space such as sRGB, use `gamma()` with `greyscale()` for the best results.
@@ -23,57 +32,116 @@ This may be overridden by other sharp operations such as `toColourspace('b-w')`,
 which will produce an output image containing one color channel.
 An alpha channel may be present, and will be unchanged by the operation.
 
-### Parameters
 
--   `greyscale` **[Boolean][5]**  (optional, default `true`)
 
-Returns **Sharp** 
+| Param | Type | Default |
+| --- | --- | --- |
+| [greyscale] | <code>Boolean</code> | <code>true</code> | 
+
+**Example**  
+```js
+const output = await sharp(input).greyscale().toBuffer();
+```
+
 
 ## grayscale
+> grayscale([grayscale]) ⇒ <code>Sharp</code>
 
 Alternative spelling of `greyscale`.
 
-### Parameters
 
--   `grayscale` **[Boolean][5]**  (optional, default `true`)
 
-Returns **Sharp** 
+| Param | Type | Default |
+| --- | --- | --- |
+| [grayscale] | <code>Boolean</code> | <code>true</code> | 
+
+
+
+## pipelineColourspace
+> pipelineColourspace([colourspace]) ⇒ <code>Sharp</code>
+
+Set the pipeline colourspace.
+
+The input image will be converted to the provided colourspace at the start of the pipeline.
+All operations will use this colourspace before converting to the output colourspace,
+as defined by [toColourspace](#tocolourspace).
+
+This feature is experimental and has not yet been fully-tested with all operations.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+**Since**: 0.29.0  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| [colourspace] | <code>string</code> | pipeline colourspace e.g. `rgb16`, `scrgb`, `lab`, `grey16` [...](https://github.com/libvips/libvips/blob/41cff4e9d0838498487a00623462204eb10ee5b8/libvips/iofuncs/enumtypes.c#L774) |
+
+**Example**  
+```js
+// Run pipeline in 16 bits per channel RGB while converting final result to 8 bits per channel sRGB.
+await sharp(input)
+ .pipelineColourspace('rgb16')
+ .toColourspace('srgb')
+ .toFile('16bpc-pipeline-to-8bpc-output.png')
+```
+
+
+## pipelineColorspace
+> pipelineColorspace([colorspace]) ⇒ <code>Sharp</code>
+
+Alternative spelling of `pipelineColourspace`.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Description |
+| --- | --- | --- |
+| [colorspace] | <code>string</code> | pipeline colorspace. |
+
+
 
 ## toColourspace
+> toColourspace([colourspace]) ⇒ <code>Sharp</code>
 
 Set the output colourspace.
 By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.
 
-### Parameters
 
--   `colourspace` **[string][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][4]** Invalid parameters
+| Param | Type | Description |
+| --- | --- | --- |
+| [colourspace] | <code>string</code> | output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://github.com/libvips/libvips/blob/3c0bfdf74ce1dc37a6429bed47fa76f16e2cd70a/libvips/iofuncs/enumtypes.c#L777-L794) |
+
+**Example**  
+```js
+// Output 16 bits per pixel RGB
+await sharp(input)
+ .toColourspace('rgb16')
+ .toFile('16-bpp.png')
+```
 
-Returns **Sharp** 
 
 ## toColorspace
+> toColorspace([colorspace]) ⇒ <code>Sharp</code>
 
 Alternative spelling of `toColourspace`.
 
-### Parameters
 
--   `colorspace` **[string][1]?** output colorspace.
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][4]** Invalid parameters
-
-Returns **Sharp** 
-
-[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[3]: https://www.npmjs.org/package/color
-
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
-
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[6]: https://github.com/libvips/libvips/blob/master/libvips/iofuncs/enumtypes.c#L568
+| Param | Type | Description |
+| --- | --- | --- |
+| [colorspace] | <code>string</code> | output colorspace. |

docs/api-composite.md

@@ -1,12 +1,14 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## composite
+> composite(images) ⇒ <code>Sharp</code>
 
 Composite image(s) over the processed (resized, extracted etc.) image.
 
 The images to composite must be the same size or smaller than the processed image.
 If both `top` and `left` options are provided, they take precedence over `gravity`.
 
+Any resize, rotate or extract operations in the same processing pipeline
+will always be applied to the input image before composition.
+
 The `blend` option can be one of `clear`, `source`, `over`, `in`, `out`, `atop`,
 `dest`, `dest-over`, `dest-in`, `dest-out`, `dest-atop`,
 `xor`, `add`, `saturate`, `multiply`, `screen`, `overlay`, `darken`, `lighten`,
@@ -14,33 +16,70 @@ The `blend` option can be one of `clear`, `source`, `over`, `in`, `out`, `atop`,
 `hard-light`, `soft-light`, `difference`, `exclusion`.
 
 More information about blend modes can be found at
-[https://libvips.github.io/libvips/API/current/libvips-conversion.html#VipsBlendMode][1]
-and [https://www.cairographics.org/operators/][2]
+https://www.libvips.org/API/current/libvips-conversion.html#VipsBlendMode
+and https://www.cairographics.org/operators/
 
-### Parameters
 
--   `images` **[Array][3]&lt;[Object][4]>** Ordered list of images to composite
-    -   `images[].input` **([Buffer][5] \| [String][6])?** Buffer containing image data, String containing the path to an image file, or Create object (see below)
-        -   `images[].input.create` **[Object][4]?** describes a blank overlay to be created.
-            -   `images[].input.create.width` **[Number][7]?** 
-            -   `images[].input.create.height` **[Number][7]?** 
-            -   `images[].input.create.channels` **[Number][7]?** 3-4
-            -   `images[].input.create.background` **([String][6] \| [Object][4])?** parsed by the [color][8] module to extract values for red, green, blue and alpha.
-    -   `images[].blend` **[String][6]** how to blend this image with the image below. (optional, default `'over'`)
-    -   `images[].gravity` **[String][6]** gravity at which to place the overlay. (optional, default `'centre'`)
-    -   `images[].top` **[Number][7]?** the pixel offset from the top edge.
-    -   `images[].left` **[Number][7]?** the pixel offset from the left edge.
-    -   `images[].tile` **[Boolean][9]** set to true to repeat the overlay image across the entire image with the given `gravity`. (optional, default `false`)
-    -   `images[].premultiplied` **[Boolean][9]** set to true to avoid premultipling the image below. Equivalent to the `--premultiplied` vips option. (optional, default `false`)
-    -   `images[].density` **[Number][7]** number representing the DPI for vector overlay image. (optional, default `72`)
-    -   `images[].raw` **[Object][4]?** describes overlay when using raw pixel data.
-        -   `images[].raw.width` **[Number][7]?** 
-        -   `images[].raw.height` **[Number][7]?** 
-        -   `images[].raw.channels` **[Number][7]?** 
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+**Since**: 0.22.0  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| images | <code>Array.&lt;Object&gt;</code> |  | Ordered list of images to composite |
+| [images[].input] | <code>Buffer</code> \| <code>String</code> |  | Buffer containing image data, String containing the path to an image file, or Create object (see below) |
+| [images[].input.create] | <code>Object</code> |  | describes a blank overlay to be created. |
+| [images[].input.create.width] | <code>Number</code> |  |  |
+| [images[].input.create.height] | <code>Number</code> |  |  |
+| [images[].input.create.channels] | <code>Number</code> |  | 3-4 |
+| [images[].input.create.background] | <code>String</code> \| <code>Object</code> |  | parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
+| [images[].input.text] | <code>Object</code> |  | describes a new text image to be created. |
+| [images[].input.text.text] | <code>string</code> |  | text to render as a UTF-8 string. It can contain Pango markup, for example `<i>Le</i>Monde`. |
+| [images[].input.text.font] | <code>string</code> |  | font name to render with. |
+| [images[].input.text.fontfile] | <code>string</code> |  | absolute filesystem path to a font file that can be used by `font`. |
+| [images[].input.text.width] | <code>number</code> | <code>0</code> | integral number of pixels to word-wrap at. Lines of text wider than this will be broken at word boundaries. |
+| [images[].input.text.height] | <code>number</code> | <code>0</code> | integral number of pixels high. When defined, `dpi` will be ignored and the text will automatically fit the pixel resolution defined by `width` and `height`. Will be ignored if `width` is not specified or set to 0. |
+| [images[].input.text.align] | <code>string</code> | <code>&quot;&#x27;left&#x27;&quot;</code> | text alignment (`'left'`, `'centre'`, `'center'`, `'right'`). |
+| [images[].input.text.justify] | <code>boolean</code> | <code>false</code> | set this to true to apply justification to the text. |
+| [images[].input.text.dpi] | <code>number</code> | <code>72</code> | the resolution (size) at which to render the text. Does not take effect if `height` is specified. |
+| [images[].input.text.rgba] | <code>boolean</code> | <code>false</code> | set this to true to enable RGBA output. This is useful for colour emoji rendering, or support for Pango markup features like `<span foreground="red">Red!</span>`. |
+| [images[].input.text.spacing] | <code>number</code> | <code>0</code> | text line height in points. Will use the font line height if none is specified. |
+| [images[].blend] | <code>String</code> | <code>&#x27;over&#x27;</code> | how to blend this image with the image below. |
+| [images[].gravity] | <code>String</code> | <code>&#x27;centre&#x27;</code> | gravity at which to place the overlay. |
+| [images[].top] | <code>Number</code> |  | the pixel offset from the top edge. |
+| [images[].left] | <code>Number</code> |  | the pixel offset from the left edge. |
+| [images[].tile] | <code>Boolean</code> | <code>false</code> | set to true to repeat the overlay image across the entire image with the given `gravity`. |
+| [images[].premultiplied] | <code>Boolean</code> | <code>false</code> | set to true to avoid premultiplying the image below. Equivalent to the `--premultiplied` vips option. |
+| [images[].density] | <code>Number</code> | <code>72</code> | number representing the DPI for vector overlay image. |
+| [images[].raw] | <code>Object</code> |  | describes overlay when using raw pixel data. |
+| [images[].raw.width] | <code>Number</code> |  |  |
+| [images[].raw.height] | <code>Number</code> |  |  |
+| [images[].raw.channels] | <code>Number</code> |  |  |
+| [images[].animated] | <code>boolean</code> | <code>false</code> | Set to `true` to read all frames/pages of an animated image. |
+| [images[].failOn] | <code>string</code> | <code>&quot;&#x27;warning&#x27;&quot;</code> | @see [constructor parameters](/api-constructor#parameters) |
+| [images[].limitInputPixels] | <code>number</code> \| <code>boolean</code> | <code>268402689</code> | @see [constructor parameters](/api-constructor#parameters) |
+
+**Example**  
+```js
+await sharp(background)
+  .composite([
+    { input: layer1, gravity: 'northwest' },
+    { input: layer2, gravity: 'southeast' },
+  ])
+  .toFile('combined.png');
+```
+**Example**  
+```js
+const output = await sharp('input.gif', { animated: true })
+  .composite([
+    { input: 'overlay.png', tile: true, blend: 'saturate' }
+  ])
+  .toBuffer();
+```
+**Example**  
+```js
 sharp('input.png')
   .rotate(180)
   .resize(300)
@@ -55,32 +94,4 @@ sharp('input.png')
     // onto orange background, composited with overlay.png with SE gravity,
     // sharpened, with metadata, 90% quality WebP image data. Phew!
   });
-```
-
--   Throws **[Error][10]** Invalid parameters
-
-Returns **Sharp** 
-
-**Meta**
-
--   **since**: 0.22.0
-
-[1]: https://libvips.github.io/libvips/API/current/libvips-conversion.html#VipsBlendMode
-
-[2]: https://www.cairographics.org/operators/
-
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
-
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[5]: https://nodejs.org/api/buffer.html
-
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[8]: https://www.npmjs.org/package/color
-
-[9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+```

docs/api-constructor.md

@@ -1,48 +1,71 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## Sharp
+> Sharp
+
+
+**Emits**: <code>Sharp#event:info</code>, <code>Sharp#event:warning</code>  
+<a name="new_Sharp_new"></a>
+
+### new
+> new Sharp([input], [options])
 
 Constructor factory to create an instance of `sharp`, to which further methods are chained.
 
-JPEG, PNG, WebP or TIFF format image data can be streamed out from this object.
+JPEG, PNG, WebP, GIF, AVIF or TIFF format image data can be streamed out from this object.
 When using Stream based output, derived attributes are available from the `info` event.
 
 Non-critical problems encountered during processing are emitted as `warning` events.
 
-Implements the [stream.Duplex][1] class.
+Implements the [stream.Duplex](http://nodejs.org/api/stream.html#stream_class_stream_duplex) class.
 
-### Parameters
+**Throws**:
 
--   `input` **([Buffer][2] \| [string][3])?** if present, can be
-     a Buffer containing JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data, or
-     a String containing the filesystem path to an JPEG, PNG, WebP, GIF, SVG or TIFF image file.
-     JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when not present.
--   `options` **[Object][4]?** if present, is an Object with optional attributes.
-    -   `options.failOnError` **[boolean][5]** by default halt processing and raise an error when loading invalid images.
-         Set this flag to `false` if you'd rather apply a "best effort" to decode images, even if the data is corrupt or invalid. (optional, default `true`)
-    -   `options.limitInputPixels` **([number][6] \| [boolean][5])** Do not process input images where the number of pixels
-         (width x height) exceeds this limit. Assumes image dimensions contained in the input metadata can be trusted.
-         An integral Number of pixels, zero or false to remove limit, true to use default limit of 268402689 (0x3FFF x 0x3FFF). (optional, default `268402689`)
-    -   `options.sequentialRead` **[boolean][5]** Set this to `true` to use sequential rather than random access where possible.
-         This can reduce memory usage and might improve performance on some systems. (optional, default `false`)
-    -   `options.density` **[number][6]** number representing the DPI for vector images in the range 1 to 100000. (optional, default `72`)
-    -   `options.pages` **[number][6]** number of pages to extract for multi-page input (GIF, TIFF, PDF), use -1 for all pages. (optional, default `1`)
-    -   `options.page` **[number][6]** page number to start extracting from for multi-page input (GIF, TIFF, PDF), zero based. (optional, default `0`)
-    -   `options.level` **[number][6]** level to extract from a multi-level input (OpenSlide), zero based. (optional, default `0`)
-    -   `options.animated` **[boolean][5]** Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`). (optional, default `false`)
-    -   `options.raw` **[Object][4]?** describes raw pixel input image data. See `raw()` for pixel ordering.
-        -   `options.raw.width` **[number][6]?** 
-        -   `options.raw.height` **[number][6]?** 
-        -   `options.raw.channels` **[number][6]?** 1-4
-    -   `options.create` **[Object][4]?** describes a new image to be created.
-        -   `options.create.width` **[number][6]?** 
-        -   `options.create.height` **[number][6]?** 
-        -   `options.create.channels` **[number][6]?** 3-4
-        -   `options.create.background` **([string][3] \| [Object][4])?** parsed by the [color][7] module to extract values for red, green, blue and alpha.
+- <code>Error</code> Invalid parameters
 
-### Examples
 
-```javascript
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [input] | <code>Buffer</code> \| <code>ArrayBuffer</code> \| <code>Uint8Array</code> \| <code>Uint8ClampedArray</code> \| <code>Int8Array</code> \| <code>Uint16Array</code> \| <code>Int16Array</code> \| <code>Uint32Array</code> \| <code>Int32Array</code> \| <code>Float32Array</code> \| <code>Float64Array</code> \| <code>string</code> |  | if present, can be  a Buffer / ArrayBuffer / Uint8Array / Uint8ClampedArray containing JPEG, PNG, WebP, AVIF, GIF, SVG or TIFF image data, or  a TypedArray containing raw pixel image data, or  a String containing the filesystem path to an JPEG, PNG, WebP, AVIF, GIF, SVG or TIFF image file.  JPEG, PNG, WebP, AVIF, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when not present. |
+| [options] | <code>Object</code> |  | if present, is an Object with optional attributes. |
+| [options.failOn] | <code>string</code> | <code>&quot;&#x27;warning&#x27;&quot;</code> | when to abort processing of invalid pixel data, one of (in order of sensitivity): 'none' (least), 'truncated', 'error' or 'warning' (most), higher levels imply lower levels, invalid metadata will always abort. |
+| [options.limitInputPixels] | <code>number</code> \| <code>boolean</code> | <code>268402689</code> | Do not process input images where the number of pixels  (width x height) exceeds this limit. Assumes image dimensions contained in the input metadata can be trusted.  An integral Number of pixels, zero or false to remove limit, true to use default limit of 268402689 (0x3FFF x 0x3FFF). |
+| [options.unlimited] | <code>boolean</code> | <code>false</code> | Set this to `true` to remove safety features that help prevent memory exhaustion (JPEG, PNG, SVG, HEIF). |
+| [options.sequentialRead] | <code>boolean</code> | <code>true</code> | Set this to `false` to use random access rather than sequential read. Some operations will do this automatically. |
+| [options.density] | <code>number</code> | <code>72</code> | number representing the DPI for vector images in the range 1 to 100000. |
+| [options.ignoreIcc] | <code>number</code> | <code>false</code> | should the embedded ICC profile, if any, be ignored. |
+| [options.pages] | <code>number</code> | <code>1</code> | Number of pages to extract for multi-page input (GIF, WebP, TIFF), use -1 for all pages. |
+| [options.page] | <code>number</code> | <code>0</code> | Page number to start extracting from for multi-page input (GIF, WebP, TIFF), zero based. |
+| [options.subifd] | <code>number</code> | <code>-1</code> | subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image. |
+| [options.level] | <code>number</code> | <code>0</code> | level to extract from a multi-level input (OpenSlide), zero based. |
+| [options.animated] | <code>boolean</code> | <code>false</code> | Set to `true` to read all frames/pages of an animated image (GIF, WebP, TIFF), equivalent of setting `pages` to `-1`. |
+| [options.raw] | <code>Object</code> |  | describes raw pixel input image data. See `raw()` for pixel ordering. |
+| [options.raw.width] | <code>number</code> |  | integral number of pixels wide. |
+| [options.raw.height] | <code>number</code> |  | integral number of pixels high. |
+| [options.raw.channels] | <code>number</code> |  | integral number of channels, between 1 and 4. |
+| [options.raw.premultiplied] | <code>boolean</code> |  | specifies that the raw input has already been premultiplied, set to `true`  to avoid sharp premultiplying the image. (optional, default `false`) |
+| [options.create] | <code>Object</code> |  | describes a new image to be created. |
+| [options.create.width] | <code>number</code> |  | integral number of pixels wide. |
+| [options.create.height] | <code>number</code> |  | integral number of pixels high. |
+| [options.create.channels] | <code>number</code> |  | integral number of channels, either 3 (RGB) or 4 (RGBA). |
+| [options.create.background] | <code>string</code> \| <code>Object</code> |  | parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
+| [options.create.noise] | <code>Object</code> |  | describes a noise to be created. |
+| [options.create.noise.type] | <code>string</code> |  | type of generated noise, currently only `gaussian` is supported. |
+| [options.create.noise.mean] | <code>number</code> |  | mean of pixels in generated noise. |
+| [options.create.noise.sigma] | <code>number</code> |  | standard deviation of pixels in generated noise. |
+| [options.text] | <code>Object</code> |  | describes a new text image to be created. |
+| [options.text.text] | <code>string</code> |  | text to render as a UTF-8 string. It can contain Pango markup, for example `<i>Le</i>Monde`. |
+| [options.text.font] | <code>string</code> |  | font name to render with. |
+| [options.text.fontfile] | <code>string</code> |  | absolute filesystem path to a font file that can be used by `font`. |
+| [options.text.width] | <code>number</code> | <code>0</code> | Integral number of pixels to word-wrap at. Lines of text wider than this will be broken at word boundaries. |
+| [options.text.height] | <code>number</code> | <code>0</code> | Maximum integral number of pixels high. When defined, `dpi` will be ignored and the text will automatically fit the pixel resolution defined by `width` and `height`. Will be ignored if `width` is not specified or set to 0. |
+| [options.text.align] | <code>string</code> | <code>&quot;&#x27;left&#x27;&quot;</code> | Alignment style for multi-line text (`'left'`, `'centre'`, `'center'`, `'right'`). |
+| [options.text.justify] | <code>boolean</code> | <code>false</code> | set this to true to apply justification to the text. |
+| [options.text.dpi] | <code>number</code> | <code>72</code> | the resolution (size) at which to render the text. Does not take effect if `height` is specified. |
+| [options.text.rgba] | <code>boolean</code> | <code>false</code> | set this to true to enable RGBA output. This is useful for colour emoji rendering, or support for pango markup features like `<span foreground="red">Red!</span>`. |
+| [options.text.spacing] | <code>number</code> | <code>0</code> | text line height in points. Will use the font line height if none is specified. |
+| [options.text.wrap] | <code>string</code> | <code>&quot;&#x27;word&#x27;&quot;</code> | word wrapping style when width is provided, one of: 'word', 'char', 'charWord' (prefer char, fallback to word) or 'none'. |
+
+**Example**  
+```js
 sharp('input.jpg')
   .resize(300, 200)
   .toFile('output.jpg', function(err) {
@@ -50,8 +73,8 @@ sharp('input.jpg')
     // containing a scaled and cropped version of input.jpg
   });
 ```
-
-```javascript
+**Example**  
+```js
 // Read image data from readableStream,
 // resize to 300 pixels wide,
 // emit an 'info' event with calculated dimensions
@@ -63,9 +86,9 @@ var transformer = sharp()
   });
 readableStream.pipe(transformer).pipe(writableStream);
 ```
-
-```javascript
-// Create a blank 300x200 PNG image of semi-transluent red pixels
+**Example**  
+```js
+// Create a blank 300x200 PNG image of semi-translucent red pixels
 sharp({
   create: {
     width: 300,
@@ -78,25 +101,77 @@ sharp({
 .toBuffer()
 .then( ... );
 ```
-
-```javascript
+**Example**  
+```js
 // Convert an animated GIF to an animated WebP
 await sharp('in.gif', { animated: true }).toFile('out.webp');
 ```
+**Example**  
+```js
+// Read a raw array of pixels and save it to a png
+const input = Uint8Array.from([255, 255, 255, 0, 0, 0]); // or Uint8ClampedArray
+const image = sharp(input, {
+  // because the input does not contain its dimensions or how many channels it has
+  // we need to specify it in the constructor options
+  raw: {
+    width: 2,
+    height: 1,
+    channels: 3
+  }
+});
+await image.toFile('my-two-pixels.png');
+```
+**Example**  
+```js
+// Generate RGB Gaussian noise
+await sharp({
+  create: {
+    width: 300,
+    height: 200,
+    channels: 3,
+    noise: {
+      type: 'gaussian',
+      mean: 128,
+      sigma: 30
+    }
+ }
+}).toFile('noise.png');
+```
+**Example**  
+```js
+// Generate an image from text
+await sharp({
+  text: {
+    text: 'Hello, world!',
+    width: 400, // max width
+    height: 300 // max height
+  }
+}).toFile('text_bw.png');
+```
+**Example**  
+```js
+// Generate an rgba image from text using pango markup and font
+await sharp({
+  text: {
+    text: '<span foreground="red">Red!</span><span background="cyan">blue</span>',
+    font: 'sans',
+    rgba: true,
+    dpi: 300
+  }
+}).toFile('text_rgba.png');
+```
 
--   Throws **[Error][8]** Invalid parameters
-
-Returns **[Sharp][9]** 
 
 ## clone
+> clone() ⇒ [<code>Sharp</code>](#Sharp)
 
 Take a "snapshot" of the Sharp instance, returning a new instance.
 Cloned instances inherit the input of their parent instance.
 This allows multiple output Streams and therefore multiple processing pipelines to share a single input Stream.
 
-### Examples
 
-```javascript
+**Example**  
+```js
 const pipeline = sharp().rotate();
 pipeline.clone().resize(800, 600).pipe(firstWritableStream);
 pipeline.clone().extract({ left: 20, top: 20, width: 100, height: 100 }).pipe(secondWritableStream);
@@ -104,15 +179,13 @@ readableStream.pipe(pipeline);
 // firstWritableStream receives auto-rotated, resized readableStream
 // secondWritableStream receives auto-rotated, extracted region of readableStream
 ```
-
-```javascript
+**Example**  
+```js
 // Create a pipeline that will download an image, resize it and format it to different files
 // Using Promises to know when the pipeline is complete
 const fs = require("fs");
 const got = require("got");
-const sharpStream = sharp({
-  failOnError: false
-});
+const sharpStream = sharp({ failOn: 'none' });
 
 const promises = [];
 
@@ -139,7 +212,7 @@ promises.push(
     .toFile("optimized-500.webp")
 );
 
-// https://github.com/sindresorhus/got#gotstreamurl-options
+// https://github.com/sindresorhus/got/blob/main/documentation/3-streams.md
 got.stream("https://www.example.com/some-file.jpg").pipe(sharpStream);
 
 Promise.all(promises)
@@ -152,24 +225,4 @@ Promise.all(promises)
       fs.unlinkSync("optimized-500.webp");
     } catch (e) {}
   });
-```
-
-Returns **[Sharp][9]** 
-
-[1]: http://nodejs.org/api/stream.html#stream_class_stream_duplex
-
-[2]: https://nodejs.org/api/buffer.html
-
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[7]: https://www.npmjs.org/package/color
-
-[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
-
-[9]: #sharp
+```

docs/api-input.md

@@ -1,42 +1,60 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## metadata
+> metadata([callback]) ⇒ <code>Promise.&lt;Object&gt;</code> \| <code>Sharp</code>
+
+Fast access to (uncached) image metadata without decoding any compressed pixel data.
+
+This is read from the header of the input image.
+It does not take into consideration any operations to be applied to the output image,
+such as resize or rotate.
+
+Dimensions in the response will respect the `page` and `pages` properties of the
+[constructor parameters](/api-constructor#parameters).
 
-Fast access to (uncached) image metadata without decoding any compressed image data.
 A `Promise` is returned when `callback` is not provided.
 
--   `format`: Name of decoder used to decompress image data e.g. `jpeg`, `png`, `webp`, `gif`, `svg`
--   `size`: Total size of image in bytes, for Stream and Buffer input only
--   `width`: Number of pixels wide (EXIF orientation is not taken into consideration)
--   `height`: Number of pixels high (EXIF orientation is not taken into consideration)
--   `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][1]
--   `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
--   `depth`: Name of pixel depth format e.g. `uchar`, `char`, `ushort`, `float` [...][2]
--   `density`: Number of pixels per inch (DPI), if present
--   `chromaSubsampling`: String containing JPEG chroma subsampling, `4:2:0` or `4:4:4` for RGB, `4:2:0:4` or `4:4:4:4` for CMYK
--   `isProgressive`: Boolean indicating whether the image is interlaced using a progressive scan
--   `pages`: Number of pages/frames contained within the image, with support for TIFF, HEIF, PDF, animated GIF and animated WebP
--   `pageHeight`: Number of pixels high each page in a multi-page image will be.
--   `loop`: Number of times to loop an animated image, zero refers to a continuous loop.
--   `delay`: Delay in ms between each page in an animated image, provided as an array of integers.
--   `pagePrimary`: Number of the primary page in a HEIF image
--   `levels`: Details of each level in a multi-level image provided as an array of objects, requires libvips compiled with support for OpenSlide
--   `hasProfile`: Boolean indicating the presence of an embedded ICC profile
--   `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
--   `orientation`: Number value of the EXIF Orientation header, if present
--   `exif`: Buffer containing raw EXIF data, if present
--   `icc`: Buffer containing raw [ICC][3] profile data, if present
--   `iptc`: Buffer containing raw IPTC data, if present
--   `xmp`: Buffer containing raw XMP data, if present
--   `tifftagPhotoshop`: Buffer containing raw TIFFTAG_PHOTOSHOP data, if present
+- `format`: Name of decoder used to decompress image data e.g. `jpeg`, `png`, `webp`, `gif`, `svg`
+- `size`: Total size of image in bytes, for Stream and Buffer input only
+- `width`: Number of pixels wide (EXIF orientation is not taken into consideration, see example below)
+- `height`: Number of pixels high (EXIF orientation is not taken into consideration, see example below)
+- `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://www.libvips.org/API/current/VipsImage.html#VipsInterpretation)
+- `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
+- `depth`: Name of pixel depth format e.g. `uchar`, `char`, `ushort`, `float` [...](https://www.libvips.org/API/current/VipsImage.html#VipsBandFormat)
+- `density`: Number of pixels per inch (DPI), if present
+- `chromaSubsampling`: String containing JPEG chroma subsampling, `4:2:0` or `4:4:4` for RGB, `4:2:0:4` or `4:4:4:4` for CMYK
+- `isProgressive`: Boolean indicating whether the image is interlaced using a progressive scan
+- `pages`: Number of pages/frames contained within the image, with support for TIFF, HEIF, PDF, animated GIF and animated WebP
+- `pageHeight`: Number of pixels high each page in a multi-page image will be.
+- `paletteBitDepth`: Bit depth of palette-based image (GIF, PNG).
+- `loop`: Number of times to loop an animated image, zero refers to a continuous loop.
+- `delay`: Delay in ms between each page in an animated image, provided as an array of integers.
+- `pagePrimary`: Number of the primary page in a HEIF image
+- `levels`: Details of each level in a multi-level image provided as an array of objects, requires libvips compiled with support for OpenSlide
+- `subifds`: Number of Sub Image File Directories in an OME-TIFF image
+- `background`: Default background colour, if present, for PNG (bKGD) and GIF images, either an RGB Object or a single greyscale value
+- `compression`: The encoder used to compress an HEIF file, `av1` (AVIF) or `hevc` (HEIC)
+- `resolutionUnit`: The unit of resolution (density), either `inch` or `cm`, if present
+- `hasProfile`: Boolean indicating the presence of an embedded ICC profile
+- `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
+- `orientation`: Number value of the EXIF Orientation header, if present
+- `exif`: Buffer containing raw EXIF data, if present
+- `icc`: Buffer containing raw [ICC](https://www.npmjs.com/package/icc) profile data, if present
+- `iptc`: Buffer containing raw IPTC data, if present
+- `xmp`: Buffer containing raw XMP data, if present
+- `tifftagPhotoshop`: Buffer containing raw TIFFTAG_PHOTOSHOP data, if present
+- `formatMagick`: String containing format for images loaded via *magick
 
-### Parameters
 
--   `callback` **[Function][4]?** called with the arguments `(err, metadata)`
 
-### Examples
+| Param | Type | Description |
+| --- | --- | --- |
+| [callback] | <code>function</code> | called with the arguments `(err, metadata)` |
 
-```javascript
+**Example**  
+```js
+const metadata = await sharp(input).metadata();
+```
+**Example**  
+```js
 const image = sharp(inputJpg);
 image
   .metadata()
@@ -50,37 +68,53 @@ image
     // data contains a WebP image half the width and height of the original JPEG
   });
 ```
+**Example**  
+```js
+// Based on EXIF rotation metadata, get the right-side-up width and height:
+
+const size = getNormalSize(await sharp(input).metadata());
+
+function getNormalSize({ width, height, orientation }) {
+  return (orientation || 0) >= 5
+    ? { width: height, height: width }
+    : { width, height };
+}
+```
 
-Returns **([Promise][5]&lt;[Object][6]> | Sharp)** 
 
 ## stats
+> stats([callback]) ⇒ <code>Promise.&lt;Object&gt;</code>
 
 Access to pixel-derived image statistics for every channel in the image.
 A `Promise` is returned when `callback` is not provided.
 
--   `channels`: Array of channel statistics for each channel in the image. Each channel statistic contains
-    -   `min` (minimum value in the channel)
-    -   `max` (maximum value in the channel)
-    -   `sum` (sum of all values in a channel)
-    -   `squaresSum` (sum of squared values in a channel)
-    -   `mean` (mean of the values in a channel)
-    -   `stdev` (standard deviation for the values in a channel)
-    -   `minX` (x-coordinate of one of the pixel where the minimum lies)
-    -   `minY` (y-coordinate of one of the pixel where the minimum lies)
-    -   `maxX` (x-coordinate of one of the pixel where the maximum lies)
-    -   `maxY` (y-coordinate of one of the pixel where the maximum lies)
--   `isOpaque`: Is the image fully opaque? Will be `true` if the image has no alpha channel or if every pixel is fully opaque.
--   `entropy`: Histogram-based estimation of greyscale entropy, discarding alpha channel if any (experimental)
--   `sharpness`: Estimation of greyscale sharpness based on the standard deviation of a Laplacian convolution, discarding alpha channel if any (experimental)
--   `dominant`: Object containing most dominant sRGB colour based on a 4096-bin 3D histogram (experimental)
+- `channels`: Array of channel statistics for each channel in the image. Each channel statistic contains
+    - `min` (minimum value in the channel)
+    - `max` (maximum value in the channel)
+    - `sum` (sum of all values in a channel)
+    - `squaresSum` (sum of squared values in a channel)
+    - `mean` (mean of the values in a channel)
+    - `stdev` (standard deviation for the values in a channel)
+    - `minX` (x-coordinate of one of the pixel where the minimum lies)
+    - `minY` (y-coordinate of one of the pixel where the minimum lies)
+    - `maxX` (x-coordinate of one of the pixel where the maximum lies)
+    - `maxY` (y-coordinate of one of the pixel where the maximum lies)
+- `isOpaque`: Is the image fully opaque? Will be `true` if the image has no alpha channel or if every pixel is fully opaque.
+- `entropy`: Histogram-based estimation of greyscale entropy, discarding alpha channel if any.
+- `sharpness`: Estimation of greyscale sharpness based on the standard deviation of a Laplacian convolution, discarding alpha channel if any.
+- `dominant`: Object containing most dominant sRGB colour based on a 4096-bin 3D histogram.
 
-### Parameters
+**Note**: Statistics are derived from the original input image. Any operations performed on the image must first be
+written to a buffer in order to run `stats` on the result (see third example).
 
--   `callback` **[Function][4]?** called with the arguments `(err, stats)`
 
-### Examples
 
-```javascript
+| Param | Type | Description |
+| --- | --- | --- |
+| [callback] | <code>function</code> | called with the arguments `(err, stats)` |
+
+**Example**  
+```js
 const image = sharp(inputJpg);
 image
   .stats()
@@ -88,22 +122,16 @@ image
      // stats contains the channel-wise statistics array and the isOpaque value
   });
 ```
-
-```javascript
+**Example**  
+```js
 const { entropy, sharpness, dominant } = await sharp(input).stats();
 const { r, g, b } = dominant;
 ```
-
-Returns **[Promise][5]&lt;[Object][6]>** 
-
-[1]: https://libvips.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
-
-[2]: https://libvips.github.io/libvips/API/current/VipsImage.html#VipsBandFormat
-
-[3]: https://www.npmjs.com/package/icc
-
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function
-
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise
-
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
+**Example**  
+```js
+const image = sharp(input);
+// store intermediate result
+const part = await image.extract(region).toBuffer();
+// create new instance to obtain statistics of extracted region
+const stats = await sharp(part).stats();
+```

docs/api-operation.md

@@ -1,12 +1,11 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## rotate
+> rotate([angle], [options]) ⇒ <code>Sharp</code>
 
 Rotate the output image by either an explicit angle
 or auto-orient based on the EXIF `Orientation` tag.
 
 If an angle is provided, it is converted to a valid positive degree rotation.
-For example, `-450` will produce a 270deg rotation.
+For example, `-450` will produce a 270 degree rotation.
 
 When rotating by an angle other than a multiple of 90,
 the background colour can be provided with the `background` option.
@@ -14,20 +13,28 @@ the background colour can be provided with the `background` option.
 If no angle is provided, it is determined from the EXIF data.
 Mirroring is supported and may infer the use of a flip operation.
 
-The use of `rotate` implies the removal of the EXIF `Orientation` tag, if any.
+The use of `rotate` without an angle will remove the EXIF `Orientation` tag, if any.
 
-Method order is important when both rotating and extracting regions,
-for example `rotate(x).extract(y)` will produce a different result to `extract(y).rotate(x)`.
+Only one rotation can occur per pipeline.
+Previous calls to `rotate` in the same pipeline will be ignored.
 
-### Parameters
+Method order is important when rotating, resizing and/or extracting regions,
+for example `.rotate(x).extract(y)` will produce a different result to `.extract(y).rotate(x)`.
 
--   `angle` **[number][1]** angle of rotation. (optional, default `auto`)
--   `options` **[Object][2]?** if present, is an Object with optional attributes.
-    -   `options.background` **([string][3] \| [Object][2])** parsed by the [color][4] module to extract values for red, green, blue and alpha. (optional, default `"#000000"`)
 
-### Examples
+**Throws**:
 
-```javascript
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [angle] | <code>number</code> | <code>auto</code> | angle of rotation. |
+| [options] | <code>Object</code> |  | if present, is an Object with optional attributes. |
+| [options.background] | <code>string</code> \| <code>Object</code> | <code>&quot;\&quot;#000000\&quot;&quot;</code> | parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
+
+**Example**  
+```js
 const pipeline = sharp()
   .rotate()
   .resize(null, 200)
@@ -38,70 +45,99 @@ const pipeline = sharp()
   });
 readableStream.pipe(pipeline);
 ```
+**Example**  
+```js
+const rotateThenResize = await sharp(input)
+  .rotate(90)
+  .resize({ width: 16, height: 8, fit: 'fill' })
+  .toBuffer();
+const resizeThenRotate = await sharp(input)
+  .resize({ width: 16, height: 8, fit: 'fill' })
+  .rotate(90)
+  .toBuffer();
+```
 
--   Throws **[Error][5]** Invalid parameters
-
-Returns **Sharp** 
 
 ## flip
+> flip([flip]) ⇒ <code>Sharp</code>
 
-Flip the image about the vertical Y axis. This always occurs after rotation, if any.
-The use of `flip` implies the removal of the EXIF `Orientation` tag, if any.
+Mirror the image vertically (up-down) about the x-axis.
+This always occurs before rotation, if any.
 
-### Parameters
+This operation does not work correctly with multi-page images.
 
--   `flip` **[Boolean][6]**  (optional, default `true`)
 
-Returns **Sharp** 
+
+| Param | Type | Default |
+| --- | --- | --- |
+| [flip] | <code>Boolean</code> | <code>true</code> | 
+
+**Example**  
+```js
+const output = await sharp(input).flip().toBuffer();
+```
+
 
 ## flop
+> flop([flop]) ⇒ <code>Sharp</code>
 
-Flop the image about the horizontal X axis. This always occurs after rotation, if any.
-The use of `flop` implies the removal of the EXIF `Orientation` tag, if any.
+Mirror the image horizontally (left-right) about the y-axis.
+This always occurs before rotation, if any.
 
-### Parameters
 
--   `flop` **[Boolean][6]**  (optional, default `true`)
 
-Returns **Sharp** 
+| Param | Type | Default |
+| --- | --- | --- |
+| [flop] | <code>Boolean</code> | <code>true</code> | 
+
+**Example**  
+```js
+const output = await sharp(input).flop().toBuffer();
+```
+
 
 ## affine
+> affine(matrix, [options]) ⇒ <code>Sharp</code>
 
 Perform an affine transform on an image. This operation will always occur after resizing, extraction and rotation, if any.
 
 You must provide an array of length 4 or a 2x2 affine transformation matrix.
 By default, new pixels are filled with a black background. You can provide a background color with the `background` option.
-A particular interpolator may also be specified. Set the `interpolator` option to an attribute of the `sharp.interpolator` Object e.g. `sharp.interpolator.nohalo`.
+A particular interpolator may also be specified. Set the `interpolator` option to an attribute of the `sharp.interpolators` Object e.g. `sharp.interpolators.nohalo`.
 
 In the case of a 2x2 matrix, the transform is:
-
--   X = `matrix[0, 0]` \* (x + `idx`) + `matrix[0, 1]` \* (y + `idy`) + `odx`
--   Y = `matrix[1, 0]` \* (x + `idx`) + `matrix[1, 1]` \* (y + `idy`) + `ody`
+- X = `matrix[0, 0]` \* (x + `idx`) + `matrix[0, 1]` \* (y + `idy`) + `odx`
+- Y = `matrix[1, 0]` \* (x + `idx`) + `matrix[1, 1]` \* (y + `idy`) + `ody`
 
 where:
+- x and y are the coordinates in input image.
+- X and Y are the coordinates in output image.
+- (0,0) is the upper left corner.
 
--   x and y are the coordinates in input image.
--   X and Y are the coordinates in output image.
--   (0,0) is the upper left corner.
 
-### Parameters
+**Throws**:
 
--   `matrix` **([Array][7]&lt;[Array][7]&lt;[number][1]>> | [Array][7]&lt;[number][1]>)** affine transformation matrix
--   `options` **[Object][2]?** if present, is an Object with optional attributes.
-    -   `options.background` **([String][3] \| [Object][2])** parsed by the [color][4] module to extract values for red, green, blue and alpha. (optional, default `"#000000"`)
-    -   `options.idx` **[Number][1]** input horizontal offset (optional, default `0`)
-    -   `options.idy` **[Number][1]** input vertical offset (optional, default `0`)
-    -   `options.odx` **[Number][1]** output horizontal offset (optional, default `0`)
-    -   `options.ody` **[Number][1]** output vertical offset (optional, default `0`)
-    -   `options.interpolator` **[String][3]** interpolator (optional, default `sharp.interpolators.bicubic`)
+- <code>Error</code> Invalid parameters
 
-### Examples
+**Since**: 0.27.0  
 
-```javascript
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| matrix | <code>Array.&lt;Array.&lt;number&gt;&gt;</code> \| <code>Array.&lt;number&gt;</code> |  | affine transformation matrix |
+| [options] | <code>Object</code> |  | if present, is an Object with optional attributes. |
+| [options.background] | <code>String</code> \| <code>Object</code> | <code>&quot;#000000&quot;</code> | parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha. |
+| [options.idx] | <code>Number</code> | <code>0</code> | input horizontal offset |
+| [options.idy] | <code>Number</code> | <code>0</code> | input vertical offset |
+| [options.odx] | <code>Number</code> | <code>0</code> | output horizontal offset |
+| [options.ody] | <code>Number</code> | <code>0</code> | output vertical offset |
+| [options.interpolator] | <code>String</code> | <code>sharp.interpolators.bicubic</code> | interpolator |
+
+**Example**  
+```js
 const pipeline = sharp()
   .affine([[1, 0.3], [0.1, 0.7]], {
      background: 'white',
-     interpolate: sharp.interpolators.nohalo
+     interpolator: sharp.interpolators.nohalo
   })
   .toBuffer((err, outputBuffer, info) => {
      // outputBuffer contains the transformed image
@@ -112,73 +148,170 @@ inputStream
   .pipe(pipeline);
 ```
 
--   Throws **[Error][5]** Invalid parameters
-
-Returns **Sharp** 
-
-**Meta**
-
--   **since**: 0.27.0
 
 ## sharpen
+> sharpen([options], [flat], [jagged]) ⇒ <code>Sharp</code>
 
 Sharpen the image.
+
 When used without parameters, performs a fast, mild sharpen of the output image.
+
 When a `sigma` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space.
-Separate control over the level of sharpening in "flat" and "jagged" areas is available.
+Fine-grained control over the level of sharpening in "flat" (m1) and "jagged" (m2) areas is available.
 
-### Parameters
-
--   `sigma` **[number][1]?** the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
--   `flat` **[number][1]** the level of sharpening to apply to "flat" areas. (optional, default `1.0`)
--   `jagged` **[number][1]** the level of sharpening to apply to "jagged" areas. (optional, default `2.0`)
+See [libvips sharpen](https://www.libvips.org/API/current/libvips-convolution.html#vips-sharpen) operation.
 
 
--   Throws **[Error][5]** Invalid parameters
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> \| <code>number</code> |  | if present, is an Object with attributes |
+| [options.sigma] | <code>number</code> |  | the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`, between 0.000001 and 10 |
+| [options.m1] | <code>number</code> | <code>1.0</code> | the level of sharpening to apply to "flat" areas, between 0 and 1000000 |
+| [options.m2] | <code>number</code> | <code>2.0</code> | the level of sharpening to apply to "jagged" areas, between 0 and 1000000 |
+| [options.x1] | <code>number</code> | <code>2.0</code> | threshold between "flat" and "jagged", between 0 and 1000000 |
+| [options.y2] | <code>number</code> | <code>10.0</code> | maximum amount of brightening, between 0 and 1000000 |
+| [options.y3] | <code>number</code> | <code>20.0</code> | maximum amount of darkening, between 0 and 1000000 |
+| [flat] | <code>number</code> |  | (deprecated) see `options.m1`. |
+| [jagged] | <code>number</code> |  | (deprecated) see `options.m2`. |
+
+**Example**  
+```js
+const data = await sharp(input).sharpen().toBuffer();
+```
+**Example**  
+```js
+const data = await sharp(input).sharpen({ sigma: 2 }).toBuffer();
+```
+**Example**  
+```js
+const data = await sharp(input)
+  .sharpen({
+    sigma: 2,
+    m1: 0,
+    m2: 3,
+    x1: 3,
+    y2: 15,
+    y3: 15,
+  })
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## median
+> median([size]) ⇒ <code>Sharp</code>
 
 Apply median filter.
 When used without parameters the default window is 3x3.
 
-### Parameters
 
--   `size` **[number][1]** square mask size: size x size (optional, default `3`)
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][5]** Invalid parameters
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [size] | <code>number</code> | <code>3</code> | square mask size: size x size |
+
+**Example**  
+```js
+const output = await sharp(input).median().toBuffer();
+```
+**Example**  
+```js
+const output = await sharp(input).median(5).toBuffer();
+```
 
-Returns **Sharp** 
 
 ## blur
+> blur([sigma]) ⇒ <code>Sharp</code>
 
 Blur the image.
-When used without parameters, performs a fast, mild blur of the output image.
+
+When used without parameters, performs a fast 3x3 box blur (equivalent to a box linear filter).
+
 When a `sigma` is provided, performs a slower, more accurate Gaussian blur.
 
-### Parameters
 
--   `sigma` **[number][1]?** a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][5]** Invalid parameters
+| Param | Type | Description |
+| --- | --- | --- |
+| [sigma] | <code>number</code> | a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`. |
+
+**Example**  
+```js
+const boxBlurred = await sharp(input)
+  .blur()
+  .toBuffer();
+```
+**Example**  
+```js
+const gaussianBlurred = await sharp(input)
+  .blur(5)
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## flatten
+> flatten([options]) ⇒ <code>Sharp</code>
 
-Merge alpha transparency channel, if any, with a background.
+Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
 
-### Parameters
+See also [removeAlpha](/api-channel#removealpha).
 
--   `options` **[Object][2]?** 
-    -   `options.background` **([string][3] \| [Object][2])** background colour, parsed by the [color][4] module, defaults to black. (optional, default `{r:0,g:0,b:0}`)
 
-Returns **Sharp** 
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.background] | <code>string</code> \| <code>Object</code> | <code>&quot;{r: 0, g: 0, b: 0}&quot;</code> | background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black. |
+
+**Example**  
+```js
+await sharp(rgbaInput)
+  .flatten({ background: '#F0A703' })
+  .toBuffer();
+```
+
+
+## unflatten
+> unflatten()
+
+Ensure the image has an alpha channel
+with all white pixel values made fully transparent.
+
+Existing alpha channel values for non-white pixels remain unchanged.
+
+This feature is experimental and the API may change.
+
+
+**Since**: 0.32.1  
+**Example**  
+```js
+await sharp(rgbInput)
+  .unflatten()
+  .toBuffer();
+```
+**Example**  
+```js
+await sharp(rgbInput)
+  .threshold(128, { grayscale: false }) // converter bright pixels to white
+  .unflatten()
+  .toBuffer();
+```
+
 
 ## gamma
+> gamma([gamma], [gammaOut]) ⇒ <code>Sharp</code>
 
 Apply a gamma correction by reducing the encoding (darken) pre-resize at a factor of `1/gamma`
 then increasing the encoding (brighten) post-resize at a factor of `gamma`.
@@ -188,62 +321,153 @@ when applying a gamma correction.
 
 Supply a second argument to use a different output gamma value, otherwise the first value is used in both cases.
 
-### Parameters
 
--   `gamma` **[number][1]** value between 1.0 and 3.0. (optional, default `2.2`)
--   `gammaOut` **[number][1]?** value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][5]** Invalid parameters
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [gamma] | <code>number</code> | <code>2.2</code> | value between 1.0 and 3.0. |
+| [gammaOut] | <code>number</code> |  | value between 1.0 and 3.0. (optional, defaults to same as `gamma`) |
+
 
-Returns **Sharp** 
 
 ## negate
+> negate([options]) ⇒ <code>Sharp</code>
 
 Produce the "negative" of the image.
 
-### Parameters
 
--   `negate` **[Boolean][6]**  (optional, default `true`)
 
-Returns **Sharp** 
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.alpha] | <code>Boolean</code> | <code>true</code> | Whether or not to negate any alpha channel |
+
+**Example**  
+```js
+const output = await sharp(input)
+  .negate()
+  .toBuffer();
+```
+**Example**  
+```js
+const output = await sharp(input)
+  .negate({ alpha: false })
+  .toBuffer();
+```
+
 
 ## normalise
+> normalise([options]) ⇒ <code>Sharp</code>
 
-Enhance output image contrast by stretching its luminance to cover the full dynamic range.
+Enhance output image contrast by stretching its luminance to cover a full dynamic range.
 
-### Parameters
+Uses a histogram-based approach, taking a default range of 1% to 99% to reduce sensitivity to noise at the extremes.
 
--   `normalise` **[Boolean][6]**  (optional, default `true`)
+Luminance values below the `lower` percentile will be underexposed by clipping to zero.
+Luminance values above the `upper` percentile will be overexposed by clipping to the max pixel value.
+
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.lower] | <code>number</code> | <code>1</code> | Percentile below which luminance values will be underexposed. |
+| [options.upper] | <code>number</code> | <code>99</code> | Percentile above which luminance values will be overexposed. |
+
+**Example**  
+```js
+const output = await sharp(input)
+  .normalise()
+  .toBuffer();
+```
+**Example**  
+```js
+const output = await sharp(input)
+  .normalise({ lower: 0, upper: 100 })
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## normalize
+> normalize([options]) ⇒ <code>Sharp</code>
 
 Alternative spelling of normalise.
 
-### Parameters
 
--   `normalize` **[Boolean][6]**  (optional, default `true`)
 
-Returns **Sharp** 
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.lower] | <code>number</code> | <code>1</code> | Percentile below which luminance values will be underexposed. |
+| [options.upper] | <code>number</code> | <code>99</code> | Percentile above which luminance values will be overexposed. |
+
+**Example**  
+```js
+const output = await sharp(input)
+  .normalize()
+  .toBuffer();
+```
+
+
+## clahe
+> clahe(options) ⇒ <code>Sharp</code>
+
+Perform contrast limiting adaptive histogram equalization
+[CLAHE](https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE).
+
+This will, in general, enhance the clarity of the image by bringing out darker details.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+**Since**: 0.28.3  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| options | <code>Object</code> |  |  |
+| options.width | <code>number</code> |  | Integral width of the search window, in pixels. |
+| options.height | <code>number</code> |  | Integral height of the search window, in pixels. |
+| [options.maxSlope] | <code>number</code> | <code>3</code> | Integral level of brightening, between 0 and 100, where 0 disables contrast limiting. |
+
+**Example**  
+```js
+const output = await sharp(input)
+  .clahe({
+    width: 3,
+    height: 3,
+  })
+  .toBuffer();
+```
+
 
 ## convolve
+> convolve(kernel) ⇒ <code>Sharp</code>
 
 Convolve the image with the specified kernel.
 
-### Parameters
 
--   `kernel` **[Object][2]** 
-    -   `kernel.width` **[number][1]** width of the kernel in pixels.
-    -   `kernel.height` **[number][1]** width of the kernel in pixels.
-    -   `kernel.kernel` **[Array][7]&lt;[number][1]>** Array of length `width*height` containing the kernel values.
-    -   `kernel.scale` **[number][1]** the scale of the kernel in pixels. (optional, default `sum`)
-    -   `kernel.offset` **[number][1]** the offset of the kernel in pixels. (optional, default `0`)
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| kernel | <code>Object</code> |  |  |
+| kernel.width | <code>number</code> |  | width of the kernel in pixels. |
+| kernel.height | <code>number</code> |  | height of the kernel in pixels. |
+| kernel.kernel | <code>Array.&lt;number&gt;</code> |  | Array of length `width*height` containing the kernel values. |
+| [kernel.scale] | <code>number</code> | <code>sum</code> | the scale of the kernel in pixels. |
+| [kernel.offset] | <code>number</code> | <code>0</code> | the offset of the kernel in pixels. |
+
+**Example**  
+```js
 sharp(input)
   .convolve({
     width: 3,
@@ -257,73 +481,107 @@ sharp(input)
   });
 ```
 
--   Throws **[Error][5]** Invalid parameters
-
-Returns **Sharp** 
 
 ## threshold
+> threshold([threshold], [options]) ⇒ <code>Sharp</code>
 
-Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
-
-### Parameters
-
--   `threshold` **[number][1]** a value in the range 0-255 representing the level at which the threshold will be applied. (optional, default `128`)
--   `options` **[Object][2]?** 
-    -   `options.greyscale` **[Boolean][6]** convert to single channel greyscale. (optional, default `true`)
-    -   `options.grayscale` **[Boolean][6]** alternative spelling for greyscale. (optional, default `true`)
+Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
 
 
--   Throws **[Error][5]** Invalid parameters
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [threshold] | <code>number</code> | <code>128</code> | a value in the range 0-255 representing the level at which the threshold will be applied. |
+| [options] | <code>Object</code> |  |  |
+| [options.greyscale] | <code>Boolean</code> | <code>true</code> | convert to single channel greyscale. |
+| [options.grayscale] | <code>Boolean</code> | <code>true</code> | alternative spelling for greyscale. |
+
 
-Returns **Sharp** 
 
 ## boolean
+> boolean(operand, operator, [options]) ⇒ <code>Sharp</code>
 
 Perform a bitwise boolean operation with operand image.
 
 This operation creates an output image where each pixel is the result of
 the selected bitwise boolean `operation` between the corresponding pixels of the input images.
 
-### Parameters
 
--   `operand` **([Buffer][8] \| [string][3])** Buffer containing image data or string containing the path to an image file.
--   `operator` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
--   `options` **[Object][2]?** 
-    -   `options.raw` **[Object][2]?** describes operand when using raw pixel data.
-        -   `options.raw.width` **[number][1]?** 
-        -   `options.raw.height` **[number][1]?** 
-        -   `options.raw.channels` **[number][1]?** 
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][5]** Invalid parameters
+| Param | Type | Description |
+| --- | --- | --- |
+| operand | <code>Buffer</code> \| <code>string</code> | Buffer containing image data or string containing the path to an image file. |
+| operator | <code>string</code> | one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively. |
+| [options] | <code>Object</code> |  |
+| [options.raw] | <code>Object</code> | describes operand when using raw pixel data. |
+| [options.raw.width] | <code>number</code> |  |
+| [options.raw.height] | <code>number</code> |  |
+| [options.raw.channels] | <code>number</code> |  |
+
 
-Returns **Sharp** 
 
 ## linear
+> linear([a], [b]) ⇒ <code>Sharp</code>
 
-Apply the linear formula a \* input + b to the image (levels adjustment)
+Apply the linear formula `a` * input + `b` to the image to adjust image levels.
 
-### Parameters
-
--   `a` **[number][1]** multiplier (optional, default `1.0`)
--   `b` **[number][1]** offset (optional, default `0.0`)
+When a single number is provided, it will be used for all image channels.
+When an array of numbers is provided, the array length must match the number of channels.
 
 
--   Throws **[Error][5]** Invalid parameters
+**Throws**:
+
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [a] | <code>number</code> \| <code>Array.&lt;number&gt;</code> | <code>[]</code> | multiplier |
+| [b] | <code>number</code> \| <code>Array.&lt;number&gt;</code> | <code>[]</code> | offset |
+
+**Example**  
+```js
+await sharp(input)
+  .linear(0.5, 2)
+  .toBuffer();
+```
+**Example**  
+```js
+await sharp(rgbInput)
+  .linear(
+    [0.25, 0.5, 0.75],
+    [150, 100, 50]
+  )
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## recomb
+> recomb(inputMatrix) ⇒ <code>Sharp</code>
 
-Recomb the image with the specified matrix.
+Recombine the image with the specified matrix.
 
-### Parameters
 
--   `inputMatrix` **[Array][7]&lt;[Array][7]&lt;[number][1]>>** 3x3 Recombination matrix
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+**Since**: 0.21.1  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| inputMatrix | <code>Array.&lt;Array.&lt;number&gt;&gt;</code> | 3x3 Recombination matrix |
+
+**Example**  
+```js
 sharp(input)
   .recomb([
    [0.3588, 0.7044, 0.1368],
@@ -332,70 +590,65 @@ sharp(input)
   ])
   .raw()
   .toBuffer(function(err, data, info) {
-    // data contains the raw pixel data after applying the recomb
+    // data contains the raw pixel data after applying the matrix
     // With this example input, a sepia filter has been applied
   });
 ```
 
--   Throws **[Error][5]** Invalid parameters
-
-Returns **Sharp** 
-
-**Meta**
-
--   **since**: 0.21.1
 
 ## modulate
+> modulate([options]) ⇒ <code>Sharp</code>
 
-Transforms the image using brightness, saturation and hue rotation.
+Transforms the image using brightness, saturation, hue rotation, and lightness.
+Brightness and lightness both operate on luminance, with the difference being that
+brightness is multiplicative whereas lightness is additive.
 
-### Parameters
 
--   `options` **[Object][2]?** 
-    -   `options.brightness` **[number][1]?** Brightness multiplier
-    -   `options.saturation` **[number][1]?** Saturation multiplier
-    -   `options.hue` **[number][1]?** Degrees for hue rotation
+**Since**: 0.22.1  
 
-### Examples
+| Param | Type | Description |
+| --- | --- | --- |
+| [options] | <code>Object</code> |  |
+| [options.brightness] | <code>number</code> | Brightness multiplier |
+| [options.saturation] | <code>number</code> | Saturation multiplier |
+| [options.hue] | <code>number</code> | Degrees for hue rotation |
+| [options.lightness] | <code>number</code> | Lightness addend |
 
-```javascript
-sharp(input)
+**Example**  
+```js
+// increase brightness by a factor of 2
+const output = await sharp(input)
   .modulate({
-    brightness: 2 // increase lightness by a factor of 2
-  });
-
-sharp(input)
+    brightness: 2
+  })
+  .toBuffer();
+```
+**Example**  
+```js
+// hue-rotate by 180 degrees
+const output = await sharp(input)
   .modulate({
-    hue: 180 // hue-rotate by 180 degrees
-  });
-
-// decreate brightness and saturation while also hue-rotating by 90 degrees
-sharp(input)
+    hue: 180
+  })
+  .toBuffer();
+```
+**Example**  
+```js
+// increase lightness by +50
+const output = await sharp(input)
+  .modulate({
+    lightness: 50
+  })
+  .toBuffer();
+```
+**Example**  
+```js
+// decrease brightness and saturation while also hue-rotating by 90 degrees
+const output = await sharp(input)
   .modulate({
     brightness: 0.5,
     saturation: 0.5,
-    hue: 90
-  });
-```
-
-Returns **Sharp** 
-
-**Meta**
-
--   **since**: 0.22.1
-
-[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[4]: https://www.npmjs.org/package/color
-
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
-
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
-
-[8]: https://nodejs.org/api/buffer.html
+    hue: 90,
+  })
+  .toBuffer();
+```

docs/api-output.md

@@ -1,168 +1,232 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## toFile
+> toFile(fileOut, [callback]) ⇒ <code>Promise.&lt;Object&gt;</code>
 
 Write output image data to a file.
 
 If an explicit output format is not selected, it will be inferred from the extension,
-with JPEG, PNG, WebP, TIFF, DZI, and libvips' V format supported.
+with JPEG, PNG, WebP, AVIF, TIFF, GIF, DZI, and libvips' V format supported.
 Note that raw pixel data is only supported for buffer output.
 
 By default all metadata will be removed, which includes EXIF-based orientation.
-See [withMetadata][1] for control over this.
+See [withMetadata](#withmetadata) for control over this.
+
+The caller is responsible for ensuring directory structures and permissions exist.
 
 A `Promise` is returned when `callback` is not provided.
 
-### Parameters
 
--   `fileOut` **[string][2]** the path to write the image data to.
--   `callback` **[Function][3]?** called on completion with two arguments `(err, info)`.
-    `info` contains the output image `format`, `size` (bytes), `width`, `height`,
-    `channels` and `premultiplied` (indicating if premultiplication was used).
-    When using a crop strategy also contains `cropOffsetLeft` and `cropOffsetTop`.
+**Returns**: <code>Promise.&lt;Object&gt;</code> - - when no callback is provided  
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Description |
+| --- | --- | --- |
+| fileOut | <code>string</code> | the path to write the image data to. |
+| [callback] | <code>function</code> | called on completion with two arguments `(err, info)`. `info` contains the output image `format`, `size` (bytes), `width`, `height`, `channels` and `premultiplied` (indicating if premultiplication was used). When using a crop strategy also contains `cropOffsetLeft` and `cropOffsetTop`. When using the attention crop strategy also contains `attentionX` and `attentionY`, the focal point of the cropped region. May also contain `textAutofitDpi` (dpi the font was rendered at) if image was created from text. |
+
+**Example**  
+```js
 sharp(input)
   .toFile('output.png', (err, info) => { ... });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .toFile('output.png')
   .then(info => { ... })
   .catch(err => { ... });
 ```
 
--   Throws **[Error][4]** Invalid parameters
-
-Returns **[Promise][5]&lt;[Object][6]>** when no callback is provided
 
 ## toBuffer
+> toBuffer([options], [callback]) ⇒ <code>Promise.&lt;Buffer&gt;</code>
 
 Write output to a Buffer.
-JPEG, PNG, WebP, TIFF and RAW output are supported.
+JPEG, PNG, WebP, AVIF, TIFF, GIF and raw pixel data output are supported.
 
-If no explicit format is set, the output format will match the input image, except GIF and SVG input which become PNG output.
+Use [toFormat](#toformat) or one of the format-specific functions such as [jpeg](#jpeg), [png](#png) etc. to set the output format.
+
+If no explicit format is set, the output format will match the input image, except SVG input which becomes PNG output.
 
 By default all metadata will be removed, which includes EXIF-based orientation.
-See [withMetadata][1] for control over this.
+See [withMetadata](#withmetadata) for control over this.
 
 `callback`, if present, gets three arguments `(err, data, info)` where:
-
--   `err` is an error, if any.
--   `data` is the output image data.
--   `info` contains the output image `format`, `size` (bytes), `width`, `height`,
-    `channels` and `premultiplied` (indicating if premultiplication was used).
-    When using a crop strategy also contains `cropOffsetLeft` and `cropOffsetTop`.
+- `err` is an error, if any.
+- `data` is the output image data.
+- `info` contains the output image `format`, `size` (bytes), `width`, `height`,
+`channels` and `premultiplied` (indicating if premultiplication was used).
+When using a crop strategy also contains `cropOffsetLeft` and `cropOffsetTop`.
+May also contain `textAutofitDpi` (dpi the font was rendered at) if image was created from text.
 
 A `Promise` is returned when `callback` is not provided.
 
-### Parameters
 
--   `options` **[Object][6]?** 
-    -   `options.resolveWithObject` **[boolean][7]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
--   `callback` **[Function][3]?** 
+**Returns**: <code>Promise.&lt;Buffer&gt;</code> - - when no callback is provided  
 
-### Examples
+| Param | Type | Description |
+| --- | --- | --- |
+| [options] | <code>Object</code> |  |
+| [options.resolveWithObject] | <code>boolean</code> | Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`. |
+| [callback] | <code>function</code> |  |
 
-```javascript
+**Example**  
+```js
 sharp(input)
   .toBuffer((err, data, info) => { ... });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .toBuffer()
   .then(data => { ... })
   .catch(err => { ... });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
+  .png()
   .toBuffer({ resolveWithObject: true })
   .then(({ data, info }) => { ... })
   .catch(err => { ... });
 ```
+**Example**  
+```js
+const { data, info } = await sharp('my-image.jpg')
+  // output the raw pixels
+  .raw()
+  .toBuffer({ resolveWithObject: true });
+
+// create a more type safe way to work with the raw pixel data
+// this will not copy the data, instead it will change `data`s underlying ArrayBuffer
+// so `data` and `pixelArray` point to the same memory location
+const pixelArray = new Uint8ClampedArray(data.buffer);
+
+// When you are done changing the pixelArray, sharp takes the `pixelArray` as an input
+const { width, height, channels } = info;
+await sharp(pixelArray, { raw: { width, height, channels } })
+  .toFile('my-changed-image.jpg');
+```
 
-Returns **[Promise][5]&lt;[Buffer][8]>** when no callback is provided
 
 ## withMetadata
+> withMetadata([options]) ⇒ <code>Sharp</code>
 
 Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
-This will also convert to and add a web-friendly sRGB ICC profile unless a custom
-output profile is provided.
+This will also convert to and add a web-friendly sRGB ICC profile if appropriate,
+unless a custom output profile is provided.
 
 The default behaviour, when `withMetadata` is not used, is to convert to the device-independent
 sRGB colour space and strip all metadata, including the removal of any ICC profile.
 
-### Parameters
+EXIF metadata is unsupported for TIFF output.
 
--   `options` **[Object][6]?** 
-    -   `options.orientation` **[number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
-    -   `options.icc` **[string][2]?** filesystem path to output ICC profile, defaults to sRGB.
 
-### Examples
+**Throws**:
 
-```javascript
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.orientation] | <code>number</code> |  | value between 1 and 8, used to update the EXIF `Orientation` tag. |
+| [options.icc] | <code>string</code> | <code>&quot;&#x27;srgb&#x27;&quot;</code> | Filesystem path to output ICC profile, relative to `process.cwd()`, defaults to built-in sRGB. |
+| [options.exif] | <code>Object.&lt;Object&gt;</code> | <code>{}</code> | Object keyed by IFD0, IFD1 etc. of key/value string pairs to write as EXIF data. |
+| [options.density] | <code>number</code> |  | Number of pixels per inch (DPI). |
+
+**Example**  
+```js
 sharp('input.jpg')
   .withMetadata()
   .toFile('output-with-metadata.jpg')
   .then(info => { ... });
 ```
+**Example**  
+```js
+// Set output EXIF metadata
+const data = await sharp(input)
+  .withMetadata({
+    exif: {
+      IFD0: {
+        Copyright: 'The National Gallery'
+      },
+      IFD3: {
+        GPSLatitudeRef: 'N',
+        GPSLatitude: '51/1 30/1 3230/100',
+        GPSLongitudeRef: 'W',
+        GPSLongitude: '0/1 7/1 4366/100'
+      }
+    }
+  })
+  .toBuffer();
+```
+**Example**  
+```js
+// Set output metadata to 96 DPI
+const data = await sharp(input)
+  .withMetadata({ density: 96 })
+  .toBuffer();
+```
 
--   Throws **[Error][4]** Invalid parameters
-
-Returns **Sharp** 
 
 ## toFormat
+> toFormat(format, options) ⇒ <code>Sharp</code>
 
 Force output to a given format.
 
-### Parameters
 
--   `format` **([string][2] \| [Object][6])** as a string or an Object with an 'id' attribute
--   `options` **[Object][6]** output options
+**Throws**:
 
-### Examples
+- <code>Error</code> unsupported format or options
 
-```javascript
+
+| Param | Type | Description |
+| --- | --- | --- |
+| format | <code>string</code> \| <code>Object</code> | as a string or an Object with an 'id' attribute |
+| options | <code>Object</code> | output options |
+
+**Example**  
+```js
 // Convert any input to PNG output
 const data = await sharp(input)
   .toFormat('png')
   .toBuffer();
 ```
 
--   Throws **[Error][4]** unsupported format or options
-
-Returns **Sharp** 
 
 ## jpeg
+> jpeg([options]) ⇒ <code>Sharp</code>
 
 Use these JPEG options for output image.
 
-Some of these options require the use of a globally-installed libvips compiled with support for mozjpeg.
 
-### Parameters
+**Throws**:
 
--   `options` **[Object][6]?** output options
-    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`)
-    -   `options.chromaSubsampling` **[string][2]** set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling (optional, default `'4:2:0'`)
-    -   `options.optimiseCoding` **[boolean][7]** optimise Huffman coding tables (optional, default `true`)
-    -   `options.optimizeCoding` **[boolean][7]** alternative spelling of optimiseCoding (optional, default `true`)
-    -   `options.trellisQuantisation` **[boolean][7]** apply trellis quantisation, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.overshootDeringing` **[boolean][7]** apply overshoot deringing, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.optimiseScans` **[boolean][7]** optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.quantisationTable` **[number][9]** quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg (optional, default `0`)
-    -   `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable, requires libvips compiled with support for mozjpeg (optional, default `0`)
-    -   `options.force` **[boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
+- <code>Error</code> Invalid options
 
-### Examples
 
-```javascript
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.quality] | <code>number</code> | <code>80</code> | quality, integer 1-100 |
+| [options.progressive] | <code>boolean</code> | <code>false</code> | use progressive (interlace) scan |
+| [options.chromaSubsampling] | <code>string</code> | <code>&quot;&#x27;4:2:0&#x27;&quot;</code> | set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling |
+| [options.optimiseCoding] | <code>boolean</code> | <code>true</code> | optimise Huffman coding tables |
+| [options.optimizeCoding] | <code>boolean</code> | <code>true</code> | alternative spelling of optimiseCoding |
+| [options.mozjpeg] | <code>boolean</code> | <code>false</code> | use mozjpeg defaults, equivalent to `{ trellisQuantisation: true, overshootDeringing: true, optimiseScans: true, quantisationTable: 3 }` |
+| [options.trellisQuantisation] | <code>boolean</code> | <code>false</code> | apply trellis quantisation |
+| [options.overshootDeringing] | <code>boolean</code> | <code>false</code> | apply overshoot deringing |
+| [options.optimiseScans] | <code>boolean</code> | <code>false</code> | optimise progressive scans, forces progressive |
+| [options.optimizeScans] | <code>boolean</code> | <code>false</code> | alternative spelling of optimiseScans |
+| [options.quantisationTable] | <code>number</code> | <code>0</code> | quantization table to use, integer 0-8 |
+| [options.quantizationTable] | <code>number</code> | <code>0</code> | alternative spelling of quantisationTable |
+| [options.force] | <code>boolean</code> | <code>true</code> | force JPEG output, otherwise attempt to use input format |
+
+**Example**  
+```js
 // Convert any input to very high quality JPEG output
 const data = await sharp(input)
   .jpeg({
@@ -171,120 +235,240 @@ const data = await sharp(input)
   })
   .toBuffer();
 ```
+**Example**  
+```js
+// Use mozjpeg to reduce output JPEG file size (slower)
+const data = await sharp(input)
+  .jpeg({ mozjpeg: true })
+  .toBuffer();
+```
 
--   Throws **[Error][4]** Invalid options
-
-Returns **Sharp** 
 
 ## png
+> png([options]) ⇒ <code>Sharp</code>
 
 Use these PNG options for output image.
 
-PNG output is always full colour at 8 or 16 bits per pixel.
+By default, PNG output is full colour at 8 or 16 bits per pixel.
 Indexed PNG input at 1, 2 or 4 bits per pixel is converted to 8 bits per pixel.
+Set `palette` to `true` for slower, indexed PNG output.
 
-Some of these options require the use of a globally-installed libvips compiled with support for libimagequant (GPL).
 
-### Parameters
+**Throws**:
 
--   `options` **[Object][6]?** 
-    -   `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`)
-    -   `options.compressionLevel` **[number][9]** zlib compression level, 0-9 (optional, default `9`)
-    -   `options.adaptiveFiltering` **[boolean][7]** use adaptive row filtering (optional, default `false`)
-    -   `options.palette` **[boolean][7]** quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant (optional, default `false`)
-    -   `options.quality` **[number][9]** use the lowest number of colours needed to achieve given quality, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `100`)
-    -   `options.colours` **[number][9]** maximum number of palette entries, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.colors` **[number][9]** alternative spelling of `options.colours`, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `1.0`)
-    -   `options.force` **[boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`)
+- <code>Error</code> Invalid options
 
-### Examples
 
-```javascript
-// Convert any input to PNG output
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.progressive] | <code>boolean</code> | <code>false</code> | use progressive (interlace) scan |
+| [options.compressionLevel] | <code>number</code> | <code>6</code> | zlib compression level, 0 (fastest, largest) to 9 (slowest, smallest) |
+| [options.adaptiveFiltering] | <code>boolean</code> | <code>false</code> | use adaptive row filtering |
+| [options.palette] | <code>boolean</code> | <code>false</code> | quantise to a palette-based image with alpha transparency support |
+| [options.quality] | <code>number</code> | <code>100</code> | use the lowest number of colours needed to achieve given quality, sets `palette` to `true` |
+| [options.effort] | <code>number</code> | <code>7</code> | CPU effort, between 1 (fastest) and 10 (slowest), sets `palette` to `true` |
+| [options.colours] | <code>number</code> | <code>256</code> | maximum number of palette entries, sets `palette` to `true` |
+| [options.colors] | <code>number</code> | <code>256</code> | alternative spelling of `options.colours`, sets `palette` to `true` |
+| [options.dither] | <code>number</code> | <code>1.0</code> | level of Floyd-Steinberg error diffusion, sets `palette` to `true` |
+| [options.force] | <code>boolean</code> | <code>true</code> | force PNG output, otherwise attempt to use input format |
+
+**Example**  
+```js
+// Convert any input to full colour PNG output
 const data = await sharp(input)
   .png()
   .toBuffer();
 ```
+**Example**  
+```js
+// Convert any input to indexed PNG output (slower)
+const data = await sharp(input)
+  .png({ palette: true })
+  .toBuffer();
+```
 
--   Throws **[Error][4]** Invalid options
-
-Returns **Sharp** 
 
 ## webp
+> webp([options]) ⇒ <code>Sharp</code>
 
 Use these WebP options for output image.
 
-### Parameters
 
--   `options` **[Object][6]?** output options
-    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.alphaQuality` **[number][9]** quality of alpha layer, integer 0-100 (optional, default `100`)
-    -   `options.lossless` **[boolean][7]** use lossless compression mode (optional, default `false`)
-    -   `options.nearLossless` **[boolean][7]** use near_lossless compression mode (optional, default `false`)
-    -   `options.smartSubsample` **[boolean][7]** use high quality chroma subsampling (optional, default `false`)
-    -   `options.reductionEffort` **[number][9]** level of CPU effort to reduce file size, integer 0-6 (optional, default `4`)
-    -   `options.pageHeight` **[number][9]?** page height for animated output
-    -   `options.loop` **[number][9]** number of animation iterations, use 0 for infinite animation (optional, default `0`)
-    -   `options.delay` **[Array][10]&lt;[number][9]>?** list of delays between animation frames (in milliseconds)
-    -   `options.force` **[boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`)
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid options
 
-```javascript
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.quality] | <code>number</code> | <code>80</code> | quality, integer 1-100 |
+| [options.alphaQuality] | <code>number</code> | <code>100</code> | quality of alpha layer, integer 0-100 |
+| [options.lossless] | <code>boolean</code> | <code>false</code> | use lossless compression mode |
+| [options.nearLossless] | <code>boolean</code> | <code>false</code> | use near_lossless compression mode |
+| [options.smartSubsample] | <code>boolean</code> | <code>false</code> | use high quality chroma subsampling |
+| [options.preset] | <code>string</code> | <code>&quot;&#x27;default&#x27;&quot;</code> | named preset for preprocessing/filtering, one of: default, photo, picture, drawing, icon, text |
+| [options.effort] | <code>number</code> | <code>4</code> | CPU effort, between 0 (fastest) and 6 (slowest) |
+| [options.loop] | <code>number</code> | <code>0</code> | number of animation iterations, use 0 for infinite animation |
+| [options.delay] | <code>number</code> \| <code>Array.&lt;number&gt;</code> |  | delay(s) between animation frames (in milliseconds) |
+| [options.minSize] | <code>boolean</code> | <code>false</code> | prevent use of animation key frames to minimise file size (slow) |
+| [options.mixed] | <code>boolean</code> | <code>false</code> | allow mixture of lossy and lossless animation frames (slow) |
+| [options.force] | <code>boolean</code> | <code>true</code> | force WebP output, otherwise attempt to use input format |
+
+**Example**  
+```js
 // Convert any input to lossless WebP output
 const data = await sharp(input)
   .webp({ lossless: true })
   .toBuffer();
 ```
+**Example**  
+```js
+// Optimise the file size of an animated WebP
+const outputWebp = await sharp(inputWebp, { animated: true })
+  .webp({ effort: 6 })
+  .toBuffer();
+```
 
--   Throws **[Error][4]** Invalid options
-
-Returns **Sharp** 
 
 ## gif
+> gif([options]) ⇒ <code>Sharp</code>
 
-Use these GIF options for output image.
+Use these GIF options for the output image.
 
-Requires libvips compiled with support for ImageMagick or GraphicsMagick.
+The first entry in the palette is reserved for transparency.
+
+The palette of the input image will be re-used if possible.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid options
+
+**Since**: 0.30.0  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.reuse] | <code>boolean</code> | <code>true</code> | re-use existing palette, otherwise generate new (slow) |
+| [options.progressive] | <code>boolean</code> | <code>false</code> | use progressive (interlace) scan |
+| [options.colours] | <code>number</code> | <code>256</code> | maximum number of palette entries, including transparency, between 2 and 256 |
+| [options.colors] | <code>number</code> | <code>256</code> | alternative spelling of `options.colours` |
+| [options.effort] | <code>number</code> | <code>7</code> | CPU effort, between 1 (fastest) and 10 (slowest) |
+| [options.dither] | <code>number</code> | <code>1.0</code> | level of Floyd-Steinberg error diffusion, between 0 (least) and 1 (most) |
+| [options.interFrameMaxError] | <code>number</code> | <code>0</code> | maximum inter-frame error for transparency, between 0 (lossless) and 32 |
+| [options.interPaletteMaxError] | <code>number</code> | <code>3</code> | maximum inter-palette error for palette reuse, between 0 and 256 |
+| [options.loop] | <code>number</code> | <code>0</code> | number of animation iterations, use 0 for infinite animation |
+| [options.delay] | <code>number</code> \| <code>Array.&lt;number&gt;</code> |  | delay(s) between animation frames (in milliseconds) |
+| [options.force] | <code>boolean</code> | <code>true</code> | force GIF output, otherwise attempt to use input format |
+
+**Example**  
+```js
+// Convert PNG to GIF
+await sharp(pngBuffer)
+  .gif()
+  .toBuffer();
+```
+**Example**  
+```js
+// Convert animated WebP to animated GIF
+await sharp('animated.webp', { animated: true })
+  .toFile('animated.gif');
+```
+**Example**  
+```js
+// Create a 128x128, cropped, non-dithered, animated thumbnail of an animated GIF
+const out = await sharp('in.gif', { animated: true })
+  .resize({ width: 128, height: 128 })
+  .gif({ dither: 0 })
+  .toBuffer();
+```
+**Example**  
+```js
+// Lossy file size reduction of animated GIF
+await sharp('in.gif', { animated: true })
+  .gif({ interFrameMaxError: 8 })
+  .toFile('optim.gif');
+```
+
+
+## jp2
+> jp2([options]) ⇒ <code>Sharp</code>
+
+Use these JP2 options for output image.
+
+Requires libvips compiled with support for OpenJPEG.
 The prebuilt binaries do not include this - see
-[installing a custom libvips][11].
-
-### Parameters
-
--   `options` **[Object][6]?** output options
-    -   `options.pageHeight` **[number][9]?** page height for animated output
-    -   `options.loop` **[number][9]** number of animation iterations, use 0 for infinite animation (optional, default `0`)
-    -   `options.delay` **[Array][10]&lt;[number][9]>?** list of delays between animation frames (in milliseconds)
-    -   `options.force` **[boolean][7]** force GIF output, otherwise attempt to use input format (optional, default `true`)
+[installing a custom libvips](https://sharp.pixelplumbing.com/install#custom-libvips).
 
 
--   Throws **[Error][4]** Invalid options
+**Throws**:
+
+- <code>Error</code> Invalid options
+
+**Since**: 0.29.1  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.quality] | <code>number</code> | <code>80</code> | quality, integer 1-100 |
+| [options.lossless] | <code>boolean</code> | <code>false</code> | use lossless compression mode |
+| [options.tileWidth] | <code>number</code> | <code>512</code> | horizontal tile size |
+| [options.tileHeight] | <code>number</code> | <code>512</code> | vertical tile size |
+| [options.chromaSubsampling] | <code>string</code> | <code>&quot;&#x27;4:4:4&#x27;&quot;</code> | set to '4:2:0' to use chroma subsampling |
+
+**Example**  
+```js
+// Convert any input to lossless JP2 output
+const data = await sharp(input)
+  .jp2({ lossless: true })
+  .toBuffer();
+```
+**Example**  
+```js
+// Convert any input to very high quality JP2 output
+const data = await sharp(input)
+  .jp2({
+    quality: 100,
+    chromaSubsampling: '4:4:4'
+  })
+  .toBuffer();
+```
 
-Returns **Sharp** 
 
 ## tiff
+> tiff([options]) ⇒ <code>Sharp</code>
 
 Use these TIFF options for output image.
 
-### Parameters
+The `density` can be set in pixels/inch via [withMetadata](#withmetadata)
+instead of providing `xres` and `yres` in pixels/mm.
 
--   `options` **[Object][6]?** output options
-    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.force` **[boolean][7]** force TIFF output, otherwise attempt to use input format (optional, default `true`)
-    -   `options.compression` **[boolean][7]** compression options: lzw, deflate, jpeg, ccittfax4 (optional, default `'jpeg'`)
-    -   `options.predictor` **[boolean][7]** compression predictor options: none, horizontal, float (optional, default `'horizontal'`)
-    -   `options.pyramid` **[boolean][7]** write an image pyramid (optional, default `false`)
-    -   `options.tile` **[boolean][7]** write a tiled tiff (optional, default `false`)
-    -   `options.tileWidth` **[boolean][7]** horizontal tile size (optional, default `256`)
-    -   `options.tileHeight` **[boolean][7]** vertical tile size (optional, default `256`)
-    -   `options.xres` **[number][9]** horizontal resolution in pixels/mm (optional, default `1.0`)
-    -   `options.yres` **[number][9]** vertical resolution in pixels/mm (optional, default `1.0`)
-    -   `options.bitdepth` **[boolean][7]** reduce bitdepth to 1, 2 or 4 bit (optional, default `8`)
 
-### Examples
+**Throws**:
 
-```javascript
+- <code>Error</code> Invalid options
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.quality] | <code>number</code> | <code>80</code> | quality, integer 1-100 |
+| [options.force] | <code>boolean</code> | <code>true</code> | force TIFF output, otherwise attempt to use input format |
+| [options.compression] | <code>string</code> | <code>&quot;&#x27;jpeg&#x27;&quot;</code> | compression options: none, jpeg, deflate, packbits, ccittfax4, lzw, webp, zstd, jp2k |
+| [options.predictor] | <code>string</code> | <code>&quot;&#x27;horizontal&#x27;&quot;</code> | compression predictor options: none, horizontal, float |
+| [options.pyramid] | <code>boolean</code> | <code>false</code> | write an image pyramid |
+| [options.tile] | <code>boolean</code> | <code>false</code> | write a tiled tiff |
+| [options.tileWidth] | <code>number</code> | <code>256</code> | horizontal tile size |
+| [options.tileHeight] | <code>number</code> | <code>256</code> | vertical tile size |
+| [options.xres] | <code>number</code> | <code>1.0</code> | horizontal resolution in pixels/mm |
+| [options.yres] | <code>number</code> | <code>1.0</code> | vertical resolution in pixels/mm |
+| [options.resolutionUnit] | <code>string</code> | <code>&quot;&#x27;inch&#x27;&quot;</code> | resolution unit options: inch, cm |
+| [options.bitdepth] | <code>number</code> | <code>8</code> | reduce bitdepth to 1, 2 or 4 bit |
+
+**Example**  
+```js
 // Convert SVG input to LZW-compressed, 1 bit per pixel TIFF output
 sharp('input.svg')
   .tiff({
@@ -295,89 +479,181 @@ sharp('input.svg')
   .then(info => { ... });
 ```
 
--   Throws **[Error][4]** Invalid options
 
-Returns **Sharp** 
+## avif
+> avif([options]) ⇒ <code>Sharp</code>
+
+Use these AVIF options for output image.
+
+AVIF image sequences are not supported.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid options
+
+**Since**: 0.27.0  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.quality] | <code>number</code> | <code>50</code> | quality, integer 1-100 |
+| [options.lossless] | <code>boolean</code> | <code>false</code> | use lossless compression |
+| [options.effort] | <code>number</code> | <code>4</code> | CPU effort, between 0 (fastest) and 9 (slowest) |
+| [options.chromaSubsampling] | <code>string</code> | <code>&quot;&#x27;4:4:4&#x27;&quot;</code> | set to '4:2:0' to use chroma subsampling |
+
+**Example**  
+```js
+const data = await sharp(input)
+  .avif({ effort: 2 })
+  .toBuffer();
+```
+**Example**  
+```js
+const data = await sharp(input)
+  .avif({ lossless: true })
+  .toBuffer();
+```
+
 
 ## heif
+> heif(options) ⇒ <code>Sharp</code>
 
 Use these HEIF options for output image.
 
-Support for HEIF (HEIC/AVIF) is experimental.
-Do not use this in production systems.
-
-Requires a custom, globally-installed libvips compiled with support for libheif.
-
-Most versions of libheif support only the patent-encumbered HEVC compression format.
-
-### Parameters
-
--   `options` **[Object][6]?** output options
-    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.compression` **[boolean][7]** compression format: hevc, avc, jpeg, av1 (optional, default `'hevc'`)
-    -   `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`)
+Support for patent-encumbered HEIC images using `hevc` compression requires the use of a
+globally-installed libvips compiled with support for libheif, libde265 and x265.
 
 
--   Throws **[Error][4]** Invalid options
+**Throws**:
 
-Returns **Sharp** 
+- <code>Error</code> Invalid options
+
+**Since**: 0.23.0  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| options | <code>Object</code> |  | output options |
+| options.compression | <code>string</code> |  | compression format: av1, hevc |
+| [options.quality] | <code>number</code> | <code>50</code> | quality, integer 1-100 |
+| [options.lossless] | <code>boolean</code> | <code>false</code> | use lossless compression |
+| [options.effort] | <code>number</code> | <code>4</code> | CPU effort, between 0 (fastest) and 9 (slowest) |
+| [options.chromaSubsampling] | <code>string</code> | <code>&quot;&#x27;4:4:4&#x27;&quot;</code> | set to '4:2:0' to use chroma subsampling |
+
+**Example**  
+```js
+const data = await sharp(input)
+  .heif({ compression: 'hevc' })
+  .toBuffer();
+```
+
+
+## jxl
+> jxl([options]) ⇒ <code>Sharp</code>
+
+Use these JPEG-XL (JXL) options for output image.
+
+This feature is experimental, please do not use in production systems.
+
+Requires libvips compiled with support for libjxl.
+The prebuilt binaries do not include this - see
+[installing a custom libvips](https://sharp.pixelplumbing.com/install#custom-libvips).
+
+Image metadata (EXIF, XMP) is unsupported.
+
+
+**Throws**:
+
+- <code>Error</code> Invalid options
+
+**Since**: 0.31.3  
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.distance] | <code>number</code> | <code>1.0</code> | maximum encoding error, between 0 (highest quality) and 15 (lowest quality) |
+| [options.quality] | <code>number</code> |  | calculate `distance` based on JPEG-like quality, between 1 and 100, overrides distance if specified |
+| [options.decodingTier] | <code>number</code> | <code>0</code> | target decode speed tier, between 0 (highest quality) and 4 (lowest quality) |
+| [options.lossless] | <code>boolean</code> | <code>false</code> | use lossless compression |
+| [options.effort] | <code>number</code> | <code>7</code> | CPU effort, between 3 (fastest) and 9 (slowest) |
 
-**Meta**
 
--   **since**: 0.23.0
 
 ## raw
+> raw([options]) ⇒ <code>Sharp</code>
 
-Force output to be raw, uncompressed, 8-bit unsigned integer (unit8) pixel data.
+Force output to be raw, uncompressed pixel data.
 Pixel ordering is left-to-right, top-to-bottom, without padding.
 Channel ordering will be RGB or RGBA for non-greyscale colourspaces.
 
-### Examples
 
-```javascript
-// Extract raw RGB pixel data from JPEG input
+**Throws**:
+
+- <code>Error</code> Invalid options
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  | output options |
+| [options.depth] | <code>string</code> | <code>&quot;&#x27;uchar&#x27;&quot;</code> | bit depth, one of: char, uchar (default), short, ushort, int, uint, float, complex, double, dpcomplex |
+
+**Example**  
+```js
+// Extract raw, unsigned 8-bit RGB pixel data from JPEG input
 const { data, info } = await sharp('input.jpg')
   .raw()
   .toBuffer({ resolveWithObject: true });
 ```
-
-```javascript
-// Extract alpha channel as raw pixel data from PNG input
+**Example**  
+```js
+// Extract alpha channel as raw, unsigned 16-bit pixel data from PNG input
 const data = await sharp('input.png')
   .ensureAlpha()
   .extractChannel(3)
   .toColourspace('b-w')
-  .raw()
+  .raw({ depth: 'ushort' })
   .toBuffer();
 ```
 
-Returns **Sharp** 
 
 ## tile
+> tile([options]) ⇒ <code>Sharp</code>
 
 Use tile-based deep zoom (image pyramid) output.
+
 Set the format and options for tile images via the `toFormat`, `jpeg`, `png` or `webp` functions.
 Use a `.zip` or `.szi` file extension with `toFile` to write to a compressed archive file format.
 
-Warning: multiple sharp instances concurrently producing tile output can expose a possible race condition in some versions of libgsf.
+The container will be set to `zip` when the output is a Buffer or Stream, otherwise it will default to `fs`.
 
-### Parameters
+Requires libvips compiled with support for libgsf.
+The prebuilt binaries do not include this - see
+[installing a custom libvips](https://sharp.pixelplumbing.com/install#custom-libvips).
 
--   `options` **[Object][6]?** 
-    -   `options.size` **[number][9]** tile size in pixels, a value between 1 and 8192. (optional, default `256`)
-    -   `options.overlap` **[number][9]** tile overlap in pixels, a value between 0 and 8192. (optional, default `0`)
-    -   `options.angle` **[number][9]** tile angle of rotation, must be a multiple of 90. (optional, default `0`)
-    -   `options.background` **([string][2] \| [Object][6])** background colour, parsed by the [color][12] module, defaults to white without transparency. (optional, default `{r:255,g:255,b:255,alpha:1}`)
-    -   `options.depth` **[string][2]?** how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
-    -   `options.skipBlanks` **[number][9]** threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images (optional, default `-1`)
-    -   `options.container` **[string][2]** tile container, with value `fs` (filesystem) or `zip` (compressed file). (optional, default `'fs'`)
-    -   `options.layout` **[string][2]** filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`. (optional, default `'dz'`)
-    -   `options.centre` **[boolean][7]** centre image in tile. (optional, default `false`)
-    -   `options.center` **[boolean][7]** alternative spelling of centre. (optional, default `false`)
 
-### Examples
+**Throws**:
 
-```javascript
+- <code>Error</code> Invalid parameters
+
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> |  |  |
+| [options.size] | <code>number</code> | <code>256</code> | tile size in pixels, a value between 1 and 8192. |
+| [options.overlap] | <code>number</code> | <code>0</code> | tile overlap in pixels, a value between 0 and 8192. |
+| [options.angle] | <code>number</code> | <code>0</code> | tile angle of rotation, must be a multiple of 90. |
+| [options.background] | <code>string</code> \| <code>Object</code> | <code>&quot;{r: 255, g: 255, b: 255, alpha: 1}&quot;</code> | background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to white without transparency. |
+| [options.depth] | <code>string</code> |  | how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout. |
+| [options.skipBlanks] | <code>number</code> | <code>-1</code> | threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images |
+| [options.container] | <code>string</code> | <code>&quot;&#x27;fs&#x27;&quot;</code> | tile container, with value `fs` (filesystem) or `zip` (compressed file). |
+| [options.layout] | <code>string</code> | <code>&quot;&#x27;dz&#x27;&quot;</code> | filesystem layout, possible values are `dz`, `iiif`, `iiif3`, `zoomify` or `google`. |
+| [options.centre] | <code>boolean</code> | <code>false</code> | centre image in tile. |
+| [options.center] | <code>boolean</code> | <code>false</code> | alternative spelling of centre. |
+| [options.id] | <code>string</code> | <code>&quot;&#x27;https://example.com/iiif&#x27;&quot;</code> | when `layout` is `iiif`/`iiif3`, sets the `@id`/`id` attribute of `info.json` |
+| [options.basename] | <code>string</code> |  | the name of the directory within the zip file when container is `zip`. |
+
+**Example**  
+```js
 sharp('input.tiff')
   .png()
   .tile({
@@ -388,31 +664,47 @@ sharp('input.tiff')
     // output_files contains 512x512 tiles grouped by zoom level
   });
 ```
+**Example**  
+```js
+const zipFileWithTiles = await sharp(input)
+  .tile({ basename: "tiles" })
+  .toBuffer();
+```
+**Example**  
+```js
+const iiififier = sharp().tile({ layout: "iiif" });
+readableStream
+  .pipe(iiififier)
+  .pipe(writeableStream);
+```
 
--   Throws **[Error][4]** Invalid parameters
 
-Returns **Sharp** 
+## timeout
+> timeout(options) ⇒ <code>Sharp</code>
 
-[1]: #withmetadata
+Set a timeout for processing, in seconds.
+Use a value of zero to continue processing indefinitely, the default behaviour.
 
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+The clock starts when libvips opens an input image for processing.
+Time spent waiting for a libuv thread to become available is not included.
 
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function
 
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+**Since**: 0.29.2  
 
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Promise
+| Param | Type | Description |
+| --- | --- | --- |
+| options | <code>Object</code> |  |
+| options.seconds | <code>number</code> | Number of seconds after which processing will be stopped |
 
-[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[8]: https://nodejs.org/api/buffer.html
-
-[9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
-
-[11]: https://sharp.pixelplumbing.com/install#custom-libvips
-
-[12]: https://www.npmjs.org/package/color
+**Example**  
+```js
+// Ensure processing takes no longer than 3 seconds
+try {
+  const data = await sharp(input)
+    .blur(1000)
+    .timeout({ seconds: 3 })
+    .toBuffer();
+} catch (err) {
+  if (err.message.includes('timeout')) { ... }
+}
+```

docs/api-resize.md

@@ -1,58 +1,64 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
 ## resize
+> resize([width], [height], [options]) ⇒ <code>Sharp</code>
 
 Resize image to `width`, `height` or `width x height`.
 
 When both a `width` and `height` are provided, the possible methods by which the image should **fit** these are:
+- `cover`: (default) Preserving aspect ratio, attempt to ensure the image covers both provided dimensions by cropping/clipping to fit.
+- `contain`: Preserving aspect ratio, contain within both provided dimensions using "letterboxing" where necessary.
+- `fill`: Ignore the aspect ratio of the input and stretch to both provided dimensions.
+- `inside`: Preserving aspect ratio, resize the image to be as large as possible while ensuring its dimensions are less than or equal to both those specified.
+- `outside`: Preserving aspect ratio, resize the image to be as small as possible while ensuring its dimensions are greater than or equal to both those specified.
 
--   `cover`: (default) Preserving aspect ratio, ensure the image covers both provided dimensions by cropping/clipping to fit.
--   `contain`: Preserving aspect ratio, contain within both provided dimensions using "letterboxing" where necessary.
--   `fill`: Ignore the aspect ratio of the input and stretch to both provided dimensions.
--   `inside`: Preserving aspect ratio, resize the image to be as large as possible while ensuring its dimensions are less than or equal to both those specified.
--   `outside`: Preserving aspect ratio, resize the image to be as small as possible while ensuring its dimensions are greater than or equal to both those specified.
+Some of these values are based on the [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit) CSS property.
 
-Some of these values are based on the [object-fit][1] CSS property.
+<img alt="Examples of various values for the fit property when resizing" width="100%" style="aspect-ratio: 998/243" src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/api-resize-fit.svg">
 
-When using a `fit` of `cover` or `contain`, the default **position** is `centre`. Other options are:
+When using a **fit** of `cover` or `contain`, the default **position** is `centre`. Other options are:
+- `sharp.position`: `top`, `right top`, `right`, `right bottom`, `bottom`, `left bottom`, `left`, `left top`.
+- `sharp.gravity`: `north`, `northeast`, `east`, `southeast`, `south`, `southwest`, `west`, `northwest`, `center` or `centre`.
+- `sharp.strategy`: `cover` only, dynamically crop using either the `entropy` or `attention` strategy.
 
--   `sharp.position`: `top`, `right top`, `right`, `right bottom`, `bottom`, `left bottom`, `left`, `left top`.
--   `sharp.gravity`: `north`, `northeast`, `east`, `southeast`, `south`, `southwest`, `west`, `northwest`, `center` or `centre`.
--   `sharp.strategy`: `cover` only, dynamically crop using either the `entropy` or `attention` strategy.
-
-Some of these values are based on the [object-position][2] CSS property.
+Some of these values are based on the [object-position](https://developer.mozilla.org/en-US/docs/Web/CSS/object-position) CSS property.
 
 The experimental strategy-based approach resizes so one dimension is at its target length
 then repeatedly ranks edge regions, discarding the edge with the lowest score based on the selected strategy.
-
--   `entropy`: focus on the region with the highest [Shannon entropy][3].
--   `attention`: focus on the region with the highest luminance frequency, colour saturation and presence of skin tones.
+- `entropy`: focus on the region with the highest [Shannon entropy](https://en.wikipedia.org/wiki/Entropy_%28information_theory%29).
+- `attention`: focus on the region with the highest luminance frequency, colour saturation and presence of skin tones.
 
 Possible interpolation kernels are:
+- `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation).
+- `cubic`: Use a [Catmull-Rom spline](https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline).
+- `mitchell`: Use a [Mitchell-Netravali spline](https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf).
+- `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
+- `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
 
--   `nearest`: Use [nearest neighbour interpolation][4].
--   `cubic`: Use a [Catmull-Rom spline][5].
--   `mitchell`: Use a [Mitchell-Netravali spline][6].
--   `lanczos2`: Use a [Lanczos kernel][7] with `a=2`.
--   `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
+Only one resize can occur per pipeline.
+Previous calls to `resize` in the same pipeline will be ignored.
 
-### Parameters
 
--   `width` **[number][8]?** pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
--   `height` **[number][8]?** pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
--   `options` **[Object][9]?** 
-    -   `options.width` **[String][10]?** alternative means of specifying `width`. If both are present this take priority.
-    -   `options.height` **[String][10]?** alternative means of specifying `height`. If both are present this take priority.
-    -   `options.fit` **[String][10]** how the image should be resized to fit both provided dimensions, one of `cover`, `contain`, `fill`, `inside` or `outside`. (optional, default `'cover'`)
-    -   `options.position` **[String][10]** position, gravity or strategy to use when `fit` is `cover` or `contain`. (optional, default `'centre'`)
-    -   `options.background` **([String][10] \| [Object][9])** background colour when using a `fit` of `contain`, parsed by the [color][11] module, defaults to black without transparency. (optional, default `{r:0,g:0,b:0,alpha:1}`)
-    -   `options.kernel` **[String][10]** the kernel to use for image reduction. (optional, default `'lanczos3'`)
-    -   `options.withoutEnlargement` **[Boolean][12]** do not enlarge if the width _or_ height are already less than the specified dimensions, equivalent to GraphicsMagick's `>` geometry option. (optional, default `false`)
-    -   `options.fastShrinkOnLoad` **[Boolean][12]** take greater advantage of the JPEG and WebP shrink-on-load feature, which can lead to a slight moiré pattern on some images. (optional, default `true`)
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [width] | <code>number</code> |  | How many pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height. |
+| [height] | <code>number</code> |  | How many pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width. |
+| [options] | <code>Object</code> |  |  |
+| [options.width] | <code>number</code> |  | An alternative means of specifying `width`. If both are present this takes priority. |
+| [options.height] | <code>number</code> |  | An alternative means of specifying `height`. If both are present this takes priority. |
+| [options.fit] | <code>String</code> | <code>&#x27;cover&#x27;</code> | How the image should be resized/cropped to fit the target dimension(s), one of `cover`, `contain`, `fill`, `inside` or `outside`. |
+| [options.position] | <code>String</code> | <code>&#x27;centre&#x27;</code> | A position, gravity or strategy to use when `fit` is `cover` or `contain`. |
+| [options.background] | <code>String</code> \| <code>Object</code> | <code>{r: 0, g: 0, b: 0, alpha: 1}</code> | background colour when `fit` is `contain`, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency. |
+| [options.kernel] | <code>String</code> | <code>&#x27;lanczos3&#x27;</code> | The kernel to use for image reduction. Use the `fastShrinkOnLoad` option to control kernel vs shrink-on-load. |
+| [options.withoutEnlargement] | <code>Boolean</code> | <code>false</code> | Do not scale up if the width *or* height are already less than the target dimensions, equivalent to GraphicsMagick's `>` geometry option. This may result in output dimensions smaller than the target dimensions. |
+| [options.withoutReduction] | <code>Boolean</code> | <code>false</code> | Do not scale down if the width *or* height are already greater than the target dimensions, equivalent to GraphicsMagick's `<` geometry option. This may still result in a crop to reach the target dimensions. |
+| [options.fastShrinkOnLoad] | <code>Boolean</code> | <code>true</code> | Take greater advantage of the JPEG and WebP shrink-on-load feature, which can lead to a slight moiré pattern or round-down of an auto-scaled dimension. |
+
+**Example**  
+```js
 sharp(input)
   .resize({ width: 100 })
   .toBuffer()
@@ -60,8 +66,8 @@ sharp(input)
     // 100 pixels wide, auto-scaled height
   });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .resize({ height: 100 })
   .toBuffer()
@@ -69,8 +75,8 @@ sharp(input)
     // 100 pixels high, auto-scaled width
   });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .resize(200, 300, {
     kernel: sharp.kernel.nearest,
@@ -85,8 +91,8 @@ sharp(input)
     // contained within the north-east corner of a semi-transparent white canvas
   });
 ```
-
-```javascript
+**Example**  
+```js
 const transformer = sharp()
   .resize({
     width: 200,
@@ -100,8 +106,8 @@ readableStream
   .pipe(transformer)
   .pipe(writableStream);
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .resize(200, 200, {
     fit: sharp.fit.inside,
@@ -115,8 +121,23 @@ sharp(input)
     // and no larger than the input image
   });
 ```
-
-```javascript
+**Example**  
+```js
+sharp(input)
+  .resize(200, 200, {
+    fit: sharp.fit.outside,
+    withoutReduction: true
+  })
+  .toFormat('jpeg')
+  .toBuffer()
+  .then(function(outputBuffer) {
+    // outputBuffer contains JPEG image data
+    // of at least 200 pixels wide and 200 pixels high while maintaining aspect ratio
+    // and no smaller than the input image
+  });
+```
+**Example**  
+```js
 const scaleByHalf = await sharp(input)
   .metadata()
   .then(({ width }) => sharp(input)
@@ -125,27 +146,32 @@ const scaleByHalf = await sharp(input)
   );
 ```
 
--   Throws **[Error][13]** Invalid parameters
-
-Returns **Sharp** 
 
 ## extend
+> extend(extend) ⇒ <code>Sharp</code>
 
-Extends/pads the edges of the image with the provided background colour.
+Extend / pad / extrude one or more edges of the image with either
+the provided background colour or pixels derived from the image.
 This operation will always occur after resizing and extraction, if any.
 
-### Parameters
 
--   `extend` **([number][8] \| [Object][9])** single pixel count to add to all edges or an Object with per-edge counts
-    -   `extend.top` **[number][8]?** 
-    -   `extend.left` **[number][8]?** 
-    -   `extend.bottom` **[number][8]?** 
-    -   `extend.right` **[number][8]?** 
-    -   `extend.background` **([String][10] \| [Object][9])** background colour, parsed by the [color][11] module, defaults to black without transparency. (optional, default `{r:0,g:0,b:0,alpha:1}`)
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| extend | <code>number</code> \| <code>Object</code> |  | single pixel count to add to all edges or an Object with per-edge counts |
+| [extend.top] | <code>number</code> | <code>0</code> |  |
+| [extend.left] | <code>number</code> | <code>0</code> |  |
+| [extend.bottom] | <code>number</code> | <code>0</code> |  |
+| [extend.right] | <code>number</code> | <code>0</code> |  |
+| [extend.extendWith] | <code>String</code> | <code>&#x27;background&#x27;</code> | populate new pixels using this method, one of: background, copy, repeat, mirror. |
+| [extend.background] | <code>String</code> \| <code>Object</code> | <code>{r: 0, g: 0, b: 0, alpha: 1}</code> | background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency. |
+
+**Example**  
+```js
 // Resize to 140 pixels wide, then add 10 transparent pixels
 // to the top, left and right edges and 20 to the bottom edge
 sharp(input)
@@ -159,38 +185,61 @@ sharp(input)
   })
   ...
 ```
+**Example**  
+```js
+// Add a row of 10 red pixels to the bottom
+sharp(input)
+  .extend({
+    bottom: 10,
+    background: 'red'
+  })
+  ...
+```
+**Example**  
+```js
+// Extrude image by 8 pixels to the right, mirroring existing right hand edge
+sharp(input)
+  .extend({
+    right: 8,
+    background: 'mirror'
+  })
+  ...
+```
 
--   Throws **[Error][13]** Invalid parameters
-
-Returns **Sharp** 
 
 ## extract
+> extract(options) ⇒ <code>Sharp</code>
 
 Extract/crop a region of the image.
 
--   Use `extract` before `resize` for pre-resize extraction.
--   Use `extract` after `resize` for post-resize extraction.
--   Use `extract` before and after for both.
+- Use `extract` before `resize` for pre-resize extraction.
+- Use `extract` after `resize` for post-resize extraction.
+- Use `extract` twice and `resize` once for extract-then-resize-then-extract in a fixed operation order.
 
-### Parameters
 
--   `options` **[Object][9]** describes the region to extract using integral pixel values
-    -   `options.left` **[number][8]** zero-indexed offset from left edge
-    -   `options.top` **[number][8]** zero-indexed offset from top edge
-    -   `options.width` **[number][8]** width of region to extract
-    -   `options.height` **[number][8]** height of region to extract
+**Throws**:
 
-### Examples
+- <code>Error</code> Invalid parameters
 
-```javascript
+
+| Param | Type | Description |
+| --- | --- | --- |
+| options | <code>Object</code> | describes the region to extract using integral pixel values |
+| options.left | <code>number</code> | zero-indexed offset from left edge |
+| options.top | <code>number</code> | zero-indexed offset from top edge |
+| options.width | <code>number</code> | width of region to extract |
+| options.height | <code>number</code> | height of region to extract |
+
+**Example**  
+```js
 sharp(input)
   .extract({ left: left, top: top, width: width, height: height })
   .toFile(output, function(err) {
     // Extract a region of the input image, saving in the same format.
   });
 ```
-
-```javascript
+**Example**  
+```js
 sharp(input)
   .extract({ left: leftOffsetPre, top: topOffsetPre, width: widthPre, height: heightPre })
   .resize(width, height)
@@ -200,49 +249,67 @@ sharp(input)
   });
 ```
 
--   Throws **[Error][13]** Invalid parameters
-
-Returns **Sharp** 
 
 ## trim
+> trim(trim) ⇒ <code>Sharp</code>
 
-Trim "boring" pixels from all edges that contain values similar to the top-left pixel.
-Images consisting entirely of a single colour will calculate "boring" using the alpha channel, if any.
+Trim pixels from all edges that contain values similar to the given background colour, which defaults to that of the top-left pixel.
+
+Images with an alpha channel will use the combined bounding box of alpha and non-alpha channels.
+
+If the result of this operation would trim an image to nothing then no change is made.
 
 The `info` response Object, obtained from callback of `.toFile()` or `.toBuffer()`,
 will contain `trimOffsetLeft` and `trimOffsetTop` properties.
 
-### Parameters
 
--   `threshold` **[number][8]** the allowed difference from the top-left pixel, a number greater than zero. (optional, default `10`)
+**Throws**:
+
+- <code>Error</code> Invalid parameters
 
 
--   Throws **[Error][13]** Invalid parameters
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| trim | <code>string</code> \| <code>number</code> \| <code>Object</code> |  | the specific background colour to trim, the threshold for doing so or an Object with both. |
+| [trim.background] | <code>string</code> \| <code>Object</code> | <code>&quot;&#x27;top-left pixel&#x27;&quot;</code> | background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to that of the top-left pixel. |
+| [trim.threshold] | <code>number</code> | <code>10</code> | the allowed difference from the above colour, a positive number. |
 
-Returns **Sharp** 
-
-[1]: https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit
-
-[2]: https://developer.mozilla.org/en-US/docs/Web/CSS/object-position
-
-[3]: https://en.wikipedia.org/wiki/Entropy_%28information_theory%29
-
-[4]: http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation
-
-[5]: https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline
-
-[6]: https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf
-
-[7]: https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel
-
-[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
-
-[9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
-
-[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
-
-[11]: https://www.npmjs.org/package/color
-
-[12]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
-
-[13]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+**Example**  
+```js
+// Trim pixels with a colour similar to that of the top-left pixel.
+sharp(input)
+  .trim()
+  .toFile(output, function(err, info) {
+    ...
+  });
+```
+**Example**  
+```js
+// Trim pixels with the exact same colour as that of the top-left pixel.
+sharp(input)
+  .trim(0)
+  .toFile(output, function(err, info) {
+    ...
+  });
+```
+**Example**  
+```js
+// Trim only pixels with a similar colour to red.
+sharp(input)
+  .trim("#FF0000")
+  .toFile(output, function(err, info) {
+    ...
+  });
+```
+**Example**  
+```js
+// Trim all "yellow-ish" pixels, being more lenient with the higher threshold.
+sharp(input)
+  .trim({
+    background: "yellow",
+    threshold: 42,
+  })
+  .toFile(output, function(err, info) {
+    ...
+  });
+```

docs/api-utility.md

@@ -1,142 +1,153 @@
-<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
-
-## format
-
-An Object containing nested boolean values representing the available input and output formats/methods.
-
-### Examples
-
-```javascript
-console.log(sharp.format);
-```
-
-Returns **[Object][1]** 
-
-## interpolators
-
-An Object containing the available interpolators and their proper values
-
-Type: [string][2]
-
-### nearest
-
-[Nearest neighbour interpolation][3]. Suitable for image enlargement only.
-
-### bilinear
-
-[Bilinear interpolation][4]. Faster than bicubic but with less smooth results.
-
-### bicubic
-
-[Bicubic interpolation][5] (the default).
-
-### locallyBoundedBicubic
-
-[LBB interpolation][6]. Prevents some "[acutance][7]" but typically reduces performance by a factor of 2.
-
-### nohalo
-
-[Nohalo interpolation][8]. Prevents acutance but typically reduces performance by a factor of 3.
-
-### vertexSplitQuadraticBasisSpline
-
-[VSQBS interpolation][9]. Prevents "staircasing" when enlarging.
-
 ## versions
+> versions
 
-An Object containing the version numbers of libvips and its dependencies.
+An Object containing the version numbers of sharp, libvips and its dependencies.
 
-### Examples
 
-```javascript
+**Example**  
+```js
 console.log(sharp.versions);
 ```
 
+
+## interpolators
+> interpolators : <code>enum</code>
+
+An Object containing the available interpolators and their proper values
+
+
+**Read only**: true  
+**Properties**
+
+| Name | Type | Default | Description |
+| --- | --- | --- | --- |
+| nearest | <code>string</code> | <code>&quot;nearest&quot;</code> | [Nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation). Suitable for image enlargement only. |
+| bilinear | <code>string</code> | <code>&quot;bilinear&quot;</code> | [Bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation). Faster than bicubic but with less smooth results. |
+| bicubic | <code>string</code> | <code>&quot;bicubic&quot;</code> | [Bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation) (the default). |
+| locallyBoundedBicubic | <code>string</code> | <code>&quot;lbb&quot;</code> | [LBB interpolation](https://github.com/libvips/libvips/blob/master/libvips/resample/lbb.cpp#L100). Prevents some "[acutance](http://en.wikipedia.org/wiki/Acutance)" but typically reduces performance by a factor of 2. |
+| nohalo | <code>string</code> | <code>&quot;nohalo&quot;</code> | [Nohalo interpolation](http://eprints.soton.ac.uk/268086/). Prevents acutance but typically reduces performance by a factor of 3. |
+| vertexSplitQuadraticBasisSpline | <code>string</code> | <code>&quot;vsqbs&quot;</code> | [VSQBS interpolation](https://github.com/libvips/libvips/blob/master/libvips/resample/vsqbs.cpp#L48). Prevents "staircasing" when enlarging. |
+
+
+
+## format
+> format ⇒ <code>Object</code>
+
+An Object containing nested boolean values representing the available input and output formats/methods.
+
+
+**Example**  
+```js
+console.log(sharp.format);
+```
+
+
+## queue
+> queue
+
+An EventEmitter that emits a `change` event when a task is either:
+- queued, waiting for _libuv_ to provide a worker thread
+- complete
+
+
+**Example**  
+```js
+sharp.queue.on('change', function(queueLength) {
+  console.log('Queue contains ' + queueLength + ' task(s)');
+});
+```
+
+
 ## cache
+> cache([options]) ⇒ <code>Object</code>
 
 Gets or, when options are provided, sets the limits of _libvips'_ operation cache.
 Existing entries in the cache will be trimmed after any change in limits.
 This method always returns cache statistics,
 useful for determining how much working memory is required for a particular task.
 
-### Parameters
 
--   `options` **([Object][1] \| [boolean][10])** Object with the following attributes, or boolean where true uses default cache settings and false removes all caching (optional, default `true`)
-    -   `options.memory` **[number][11]** is the maximum memory in MB to use for this cache (optional, default `50`)
-    -   `options.files` **[number][11]** is the maximum number of files to hold open (optional, default `20`)
-    -   `options.items` **[number][11]** is the maximum number of operations to cache (optional, default `100`)
 
-### Examples
+| Param | Type | Default | Description |
+| --- | --- | --- | --- |
+| [options] | <code>Object</code> \| <code>boolean</code> | <code>true</code> | Object with the following attributes, or boolean where true uses default cache settings and false removes all caching |
+| [options.memory] | <code>number</code> | <code>50</code> | is the maximum memory in MB to use for this cache |
+| [options.files] | <code>number</code> | <code>20</code> | is the maximum number of files to hold open |
+| [options.items] | <code>number</code> | <code>100</code> | is the maximum number of operations to cache |
 
-```javascript
+**Example**  
+```js
 const stats = sharp.cache();
 ```
-
-```javascript
+**Example**  
+```js
 sharp.cache( { items: 200 } );
 sharp.cache( { files: 0 } );
 sharp.cache(false);
 ```
 
-Returns **[Object][1]** 
 
 ## concurrency
+> concurrency([concurrency]) ⇒ <code>number</code>
 
 Gets or, when a concurrency is provided, sets
-the number of threads _libvips'_ should create to process each image.
-The default value is the number of CPU cores.
-A value of `0` will reset to this default.
-
-The maximum number of images that can be processed in parallel
-is limited by libuv's `UV_THREADPOOL_SIZE` environment variable.
+the maximum number of threads _libvips_ should use to process _each image_.
+These are from a thread pool managed by glib,
+which helps avoid the overhead of creating new threads.
 
 This method always returns the current concurrency.
 
-### Parameters
+The default value is the number of CPU cores,
+except when using glibc-based Linux without jemalloc,
+where the default is `1` to help reduce memory fragmentation.
 
--   `concurrency` **[number][11]?** 
+A value of `0` will reset this to the number of CPU cores.
 
-### Examples
+Some image format libraries spawn additional threads,
+e.g. libaom manages its own 4 threads when encoding AVIF images,
+and these are independent of the value set here.
 
-```javascript
+The maximum number of images that sharp can process in parallel
+is controlled by libuv's `UV_THREADPOOL_SIZE` environment variable,
+which defaults to 4.
+
+https://nodejs.org/api/cli.html#uv_threadpool_sizesize
+
+For example, by default, a machine with 8 CPU cores will process
+4 images in parallel and use up to 8 threads per image,
+so there will be up to 32 concurrent threads.
+
+
+**Returns**: <code>number</code> - concurrency  
+
+| Param | Type |
+| --- | --- |
+| [concurrency] | <code>number</code> | 
+
+**Example**  
+```js
 const threads = sharp.concurrency(); // 4
 sharp.concurrency(2); // 2
 sharp.concurrency(0); // 4
 ```
 
-Returns **[number][11]** concurrency
-
-## queue
-
-An EventEmitter that emits a `change` event when a task is either:
-
--   queued, waiting for _libuv_ to provide a worker thread
--   complete
-
-### Examples
-
-```javascript
-sharp.queue.on('change', function(queueLength) {
-  console.log('Queue contains ' + queueLength + ' task(s)');
-});
-```
 
 ## counters
+> counters() ⇒ <code>Object</code>
 
 Provides access to internal task counters.
+- queue is the number of tasks this module has queued waiting for _libuv_ to provide a worker thread from its pool.
+- process is the number of resize tasks currently being processed.
 
--   queue is the number of tasks this module has queued waiting for _libuv_ to provide a worker thread from its pool.
--   process is the number of resize tasks currently being processed.
 
-### Examples
-
-```javascript
+**Example**  
+```js
 const counters = sharp.counters(); // { queue: 2, process: 4 }
 ```
 
-Returns **[Object][1]** 
 
 ## simd
+> simd([simd]) ⇒ <code>boolean</code>
 
 Get and set use of SIMD vector unit instructions.
 Requires libvips to have been compiled with liborc support.
@@ -144,42 +155,78 @@ Requires libvips to have been compiled with liborc support.
 Improves the performance of `resize`, `blur` and `sharpen` operations
 by taking advantage of the SIMD vector unit of the CPU, e.g. Intel SSE and ARM NEON.
 
-### Parameters
 
--   `simd` **[boolean][10]**  (optional, default `true`)
 
-### Examples
+| Param | Type | Default |
+| --- | --- | --- |
+| [simd] | <code>boolean</code> | <code>true</code> | 
 
-```javascript
+**Example**  
+```js
 const simd = sharp.simd();
 // simd is `true` if the runtime use of liborc is currently enabled
 ```
-
-```javascript
+**Example**  
+```js
 const simd = sharp.simd(false);
 // prevent libvips from using liborc at runtime
 ```
 
-Returns **[boolean][10]** 
 
-[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
+## block
+> block(options)
 
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+Block libvips operations at runtime.
 
-[3]: http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation
+This is in addition to the `VIPS_BLOCK_UNTRUSTED` environment variable,
+which when set will block all "untrusted" operations.
 
-[4]: http://en.wikipedia.org/wiki/Bilinear_interpolation
 
-[5]: http://en.wikipedia.org/wiki/Bicubic_interpolation
+**Since**: 0.32.4  
 
-[6]: https://github.com/jcupitt/libvips/blob/master/libvips/resample/lbb.cpp#L100
+| Param | Type | Description |
+| --- | --- | --- |
+| options | <code>Object</code> |  |
+| options.operation | <code>Array.&lt;string&gt;</code> | List of libvips low-level operation names to block. |
 
-[7]: http://en.wikipedia.org/wiki/Acutance
+**Example** *(Block all TIFF input.)*  
+```js
+sharp.block({
+  operation: ['VipsForeignLoadTiff']
+});
+```
 
-[8]: http://eprints.soton.ac.uk/268086/
 
-[9]: https://github.com/jcupitt/libvips/blob/master/libvips/resample/vsqbs.cpp#L48
+## unblock
+> unblock(options)
 
-[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
+Unblock libvips operations at runtime.
 
-[11]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
+This is useful for defining a list of allowed operations.
+
+
+**Since**: 0.32.4  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| options | <code>Object</code> |  |
+| options.operation | <code>Array.&lt;string&gt;</code> | List of libvips low-level operation names to unblock. |
+
+**Example** *(Block all input except WebP from the filesystem.)*  
+```js
+sharp.block({
+  operation: ['VipsForeignLoad']
+});
+sharp.unblock({
+  operation: ['VipsForeignLoadWebpFile']
+});
+```
+**Example** *(Block all input except JPEG and PNG from a Buffer or Stream.)*  
+```js
+sharp.block({
+  operation: ['VipsForeignLoad']
+});
+sharp.unblock({
+  operation: ['VipsForeignLoadJpegBuffer', 'VipsForeignLoadPngBuffer']
+});
+```

docs/build.js

@@ -0,0 +1,38 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+const fs = require('fs').promises;
+const path = require('path');
+const jsdoc2md = require('jsdoc-to-markdown');
+
+[
+  'constructor',
+  'input',
+  'resize',
+  'composite',
+  'operation',
+  'colour',
+  'channel',
+  'output',
+  'utility'
+].forEach(async (m) => {
+  const input = path.join('lib', `${m}.js`);
+  const output = path.join('docs', `api-${m}.md`);
+
+  const ast = await jsdoc2md.getTemplateData({ files: input });
+  const markdown = await jsdoc2md.render({
+    data: ast,
+    'global-index-format': 'none',
+    'module-index-format': 'none'
+  });
+
+  const cleanMarkdown = markdown
+    .replace(/(## )([A-Za-z0-9]+)([^\n]*)/g, '$1$2\n> $2$3\n') // simplify headings to match those of documentationjs, ensures existing URLs work
+    .replace(/<a name="[A-Za-z0-9+]+"><\/a>/g, '') // remove anchors, let docute add these (at markdown to HTML render time)
+    .replace(/\*\*Kind\*\*: global[^\n]+/g, '') // remove all "global" Kind labels (requires JSDoc refactoring)
+    .trim();
+
+  await fs.writeFile(output, cleanMarkdown);
+});

docs/changelog.md

@@ -1,5 +1,695 @@
 # Changelog
 
+## v0.33 - *gauge*
+
+Requires libvips v8.14.5
+
+### v0.33.0 - TBD
+
+* Drop support for Node.js 14 and 16, now requires Node.js >= 18.17.0
+
+* Remove `sharp.vendor`.
+
+* Make `compression` option of `heif` mandatory to help reduce HEIF vs HEIC confusion.
+  [#3740](https://github.com/lovell/sharp/issues/3740)
+
+* Ensure correct interpretation of 16-bit raw input.
+  [#3808](https://github.com/lovell/sharp/issues/3808)
+
+## v0.32 - *flow*
+
+Requires libvips v8.14.5
+
+### v0.32.6 - 18th September 2023
+
+* Upgrade to libvips v8.14.5 for upstream bug fixes.
+
+* Ensure composite tile images are fully decoded (regression in 0.32.0).
+  [#3767](https://github.com/lovell/sharp/issues/3767)
+
+* Ensure `withMetadata` can add ICC profiles to RGB16 output.
+  [#3773](https://github.com/lovell/sharp/issues/3773)
+
+* Ensure `withMetadata` does not reduce 16-bit images to 8-bit (regression in 0.32.5).
+  [#3773](https://github.com/lovell/sharp/issues/3773)
+
+* TypeScript: Add definitions for block and unblock.
+  [#3799](https://github.com/lovell/sharp/pull/3799)
+  [@ldrick](https://github.com/ldrick)
+
+### v0.32.5 - 15th August 2023
+
+* Upgrade to libvips v8.14.4 for upstream bug fixes.
+
+* TypeScript: Add missing `WebpPresetEnum` to definitions.
+  [#3748](https://github.com/lovell/sharp/pull/3748)
+  [@pilotso11](https://github.com/pilotso11)
+
+* Ensure compilation using musl v1.2.4.
+  [#3755](https://github.com/lovell/sharp/pull/3755)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Ensure resize with a `fit` of `inside` respects 90/270 degree rotation.
+  [#3756](https://github.com/lovell/sharp/issues/3756)
+
+* TypeScript: Ensure `minSize` property of `WebpOptions` is boolean.
+  [#3758](https://github.com/lovell/sharp/pull/3758)
+  [@sho-xizz](https://github.com/sho-xizz)
+
+* Ensure `withMetadata` adds default sRGB profile.
+  [#3761](https://github.com/lovell/sharp/issues/3761)
+
+### v0.32.4 - 21st July 2023
+
+* Upgrade to libvips v8.14.3 for upstream bug fixes.
+
+* Expose ability to (un)block low-level libvips operations by name.
+
+* Prebuilt binaries: restore support for tile-based output.
+  [#3581](https://github.com/lovell/sharp/issues/3581)
+
+### v0.32.3 - 14th July 2023
+
+* Expose `preset` option for WebP output.
+  [#3639](https://github.com/lovell/sharp/issues/3639)
+
+* Ensure decoding remains sequential for all operations (regression in 0.32.2).
+  [#3725](https://github.com/lovell/sharp/issues/3725)
+
+### v0.32.2 - 11th July 2023
+
+* Limit HEIF output dimensions to 16384x16384, matches libvips.
+
+* Ensure exceptions are not thrown when terminating.
+  [#3569](https://github.com/lovell/sharp/issues/3569)
+
+* Ensure the same access method is used for all inputs (regression in 0.32.0).
+  [#3669](https://github.com/lovell/sharp/issues/3669)
+
+* Improve detection of jp2 filename extensions.
+  [#3674](https://github.com/lovell/sharp/pull/3674)
+  [@bianjunjie1981](https://github.com/bianjunjie1981)
+
+* Guard use of smartcrop premultiplied option to prevent warning (regression in 0.32.1).
+  [#3710](https://github.com/lovell/sharp/issues/3710)
+
+* Prevent over-compute in affine-based rotate before resize.
+  [#3722](https://github.com/lovell/sharp/issues/3722)
+
+* Allow sequential read for EXIF-based auto-orientation.
+  [#3725](https://github.com/lovell/sharp/issues/3725)
+
+### v0.32.1 - 27th April 2023
+
+* Add experimental `unflatten` operation.
+  [#3461](https://github.com/lovell/sharp/pull/3461)
+  [@antonmarsden](https://github.com/antonmarsden)
+
+* Ensure use of `flip` operation forces random access read (regression in 0.32.0).
+  [#3600](https://github.com/lovell/sharp/issues/3600)
+
+* Ensure `linear` operation works with 16-bit input (regression in 0.31.3).
+  [#3605](https://github.com/lovell/sharp/issues/3605)
+
+* Install: ensure proxy URLs are logged correctly.
+  [#3615](https://github.com/lovell/sharp/pull/3615)
+  [@TomWis97](https://github.com/TomWis97)
+
+* Ensure profile-less CMYK to CMYK roundtrip skips colourspace conversion.
+  [#3620](https://github.com/lovell/sharp/issues/3620)
+
+* Add support for `modulate` operation when using non-sRGB pipeline colourspace.
+  [#3620](https://github.com/lovell/sharp/issues/3620)
+
+* Ensure `trim` operation works with CMYK images (regression in 0.31.0).
+  [#3636](https://github.com/lovell/sharp/issues/3636)
+
+* Install: coerce libc version to semver.
+  [#3641](https://github.com/lovell/sharp/issues/3641)
+
+### v0.32.0 - 24th March 2023
+
+* Default to using sequential rather than random access read where possible.
+
+* Replace GIF output `optimise` / `optimize` option with `reuse`.
+
+* Add `progressive` option to GIF output for interlacing.
+
+* Add `wrap` option to text image creation.
+
+* Add `formatMagick` property to metadata of images loaded via *magick.
+
+* Prefer integer (un)premultiply for faster resizing of RGBA images.
+
+* Add `ignoreIcc` input option to ignore embedded ICC profile.
+
+* Allow use of GPS (IFD3) EXIF metadata.
+  [#2767](https://github.com/lovell/sharp/issues/2767)
+
+* TypeScript definitions are now maintained and published directly, deprecating the `@types/sharp` package.
+  [#3369](https://github.com/lovell/sharp/issues/3369)
+
+* Prebuilt binaries: ensure macOS 10.13+ support, as documented.
+  [#3438](https://github.com/lovell/sharp/issues/3438)
+
+* Prebuilt binaries: prevent use of glib slice allocator, improves QEMU support.
+  [#3448](https://github.com/lovell/sharp/issues/3448)
+
+* Add focus point coordinates to output when using attention based crop.
+  [#3470](https://github.com/lovell/sharp/pull/3470)
+  [@ejoebstl](https://github.com/ejoebstl)
+
+* Expose sharp version as `sharp.versions.sharp`.
+  [#3471](https://github.com/lovell/sharp/issues/3471)
+
+* Respect `fastShrinkOnLoad` resize option for WebP input.
+  [#3516](https://github.com/lovell/sharp/issues/3516)
+
+* Reduce sharpen `sigma` maximum from 10000 to 10.
+  [#3521](https://github.com/lovell/sharp/issues/3521)
+
+* Add support for `ArrayBuffer` input.
+  [#3548](https://github.com/lovell/sharp/pull/3548)
+  [@kapouer](https://github.com/kapouer)
+
+* Add support to `extend` operation for `extendWith` to allow copy/mirror/repeat.
+  [#3556](https://github.com/lovell/sharp/pull/3556)
+  [@janaz](https://github.com/janaz)
+
+* Ensure all async JS callbacks are wrapped to help avoid possible race condition.
+  [#3569](https://github.com/lovell/sharp/issues/3569)
+
+* Prebuilt binaries: support for tile-based output temporarily removed due to licensing issue.
+  [#3581](https://github.com/lovell/sharp/issues/3581)
+
+* Add support to `normalise` for `lower` and `upper` percentiles.
+  [#3583](https://github.com/lovell/sharp/pull/3583)
+  [@LachlanNewman](https://github.com/LachlanNewman)
+
+## v0.31 - *eagle*
+
+Requires libvips v8.13.3
+
+### v0.31.3 - 21st December 2022
+
+* Add experimental support for JPEG-XL images. Requires libvips compiled with libjxl.
+  [#2731](https://github.com/lovell/sharp/issues/2731)
+
+* Add runtime detection of V8 memory cage, ensures compatibility with Electron 21 onwards.
+  [#3384](https://github.com/lovell/sharp/issues/3384)
+
+* Expose `interFrameMaxError` and `interPaletteMaxError` GIF optimisation properties.
+  [#3401](https://github.com/lovell/sharp/issues/3401)
+
+* Allow installation on Linux with glibc patch versions e.g. Fedora 38.
+  [#3423](https://github.com/lovell/sharp/issues/3423)
+
+* Expand range of existing `sharpen` parameters to match libvips.
+  [#3427](https://github.com/lovell/sharp/issues/3427)
+
+* Prevent possible race condition awaiting metadata of Stream-based input.
+  [#3451](https://github.com/lovell/sharp/issues/3451)
+
+* Improve `extractChannel` support for 16-bit output colourspaces.
+  [#3453](https://github.com/lovell/sharp/issues/3453)
+
+* Ignore `sequentialRead` option when calculating image statistics.
+  [#3462](https://github.com/lovell/sharp/issues/3462)
+
+* Small performance improvement for operations that introduce a non-opaque background.
+  [#3465](https://github.com/lovell/sharp/issues/3465)
+
+* Ensure integral output of `linear` operation.
+  [#3468](https://github.com/lovell/sharp/issues/3468)
+
+### v0.31.2 - 4th November 2022
+
+* Upgrade to libvips v8.13.3 for upstream bug fixes.
+
+* Ensure manual flip, rotate, resize operation ordering (regression in 0.31.1)
+  [#3391](https://github.com/lovell/sharp/issues/3391)
+
+* Ensure auto-rotation works without resize (regression in 0.31.1)
+  [#3422](https://github.com/lovell/sharp/issues/3422)
+
+### v0.31.1 - 29th September 2022
+
+* Upgrade to libvips v8.13.2 for upstream bug fixes.
+
+* Ensure `close` event occurs after `end` event for Stream-based output.
+  [#3313](https://github.com/lovell/sharp/issues/3313)
+
+* Ensure `limitInputPixels` constructor option uses uint64.
+  [#3349](https://github.com/lovell/sharp/pull/3349)
+  [@marcosc90](https://github.com/marcosc90)
+
+* Ensure auto-rotation works with shrink-on-load and extract (regression in 0.31.0).
+  [#3352](https://github.com/lovell/sharp/issues/3352)
+
+* Ensure AVIF output is always 8-bit.
+  [#3358](https://github.com/lovell/sharp/issues/3358)
+
+* Ensure greyscale images can be trimmed (regression in 0.31.0).
+  [#3386](https://github.com/lovell/sharp/issues/3386)
+
+### v0.31.0 - 5th September 2022
+
+* Drop support for Node.js 12, now requires Node.js >= 14.15.0.
+
+* GIF output now re-uses input palette if possible. Use `reoptimise` option to generate a new palette.
+
+* Add WebP `minSize` and `mixed` options for greater control over animation frames.
+
+* Remove previously-deprecated WebP `reductionEffort` and HEIF `speed` options. Use `effort` to control these.
+
+* The `flip` and `flop` operations will now occur before the `rotate` operation.
+
+* Improve `normalise` operation with use of histogram.
+  [#200](https://github.com/lovell/sharp/issues/200)
+
+* Use combined bounding box of alpha and non-alpha channels for `trim` operation.
+  [#2166](https://github.com/lovell/sharp/issues/2166)
+
+* Add Buffer and Stream support to tile-based output.
+  [#2238](https://github.com/lovell/sharp/issues/2238)
+
+* Add input `fileSuffix` and output `alias` to `format` information.
+  [#2642](https://github.com/lovell/sharp/issues/2642)
+
+* Re-introduce support for greyscale ICC profiles (temporarily removed in 0.30.2).
+  [#3114](https://github.com/lovell/sharp/issues/3114)
+
+* Add support for WebP and PackBits `compression` options with TIFF output.
+  [#3198](https://github.com/lovell/sharp/issues/3198)
+
+* Ensure OpenSlide and FITS input works with custom libvips.
+  [#3226](https://github.com/lovell/sharp/issues/3226)
+
+* Ensure `trim` operation is a no-op when it would reduce an image to nothing.
+  [#3223](https://github.com/lovell/sharp/issues/3223)
+
+* Expose `vips_text` to create an image containing rendered text.
+  [#3252](https://github.com/lovell/sharp/pull/3252)
+  [@brahima](https://github.com/brahima)
+
+* Ensure only properties owned by the `withMetadata` EXIF Object are parsed.
+  [#3292](https://github.com/lovell/sharp/issues/3292)
+
+* Expand `linear` operation to allow use of per-channel arrays.
+  [#3303](https://github.com/lovell/sharp/pull/3303)
+  [@antonmarsden](https://github.com/antonmarsden)
+
+* Ensure the order of `rotate`, `resize` and `extend` operations is respected where possible.
+  Emit warnings when previous calls in the same pipeline will be ignored.
+  [#3319](https://github.com/lovell/sharp/issues/3319)
+
+* Ensure PNG bitdepth can be set for non-palette output.
+  [#3322](https://github.com/lovell/sharp/issues/3322)
+
+* Add trim option to provide a specific background colour.
+  [#3332](https://github.com/lovell/sharp/pull/3332)
+  [@mart-jansink](https://github.com/mart-jansink)
+
+* Ensure resized image is unpremultiplied before composite.
+  [#3334](https://github.com/lovell/sharp/issues/3334)
+
+## v0.30 - *dresser*
+
+Requires libvips v8.12.2
+
+### v0.30.7 - 22nd June 2022
+
+* Ensure tiled composition always works with outside resizing.
+  [#3227](https://github.com/lovell/sharp/issues/3227)
+
+* Allow WebP encoding effort of 0.
+  [#3261](https://github.com/lovell/sharp/pull/3261)
+  [@AlexanderTheGrey](https://github.com/AlexanderTheGrey)
+
+* Prevent upsampling via libwebp.
+  [#3267](https://github.com/lovell/sharp/pull/3267)
+  [@blacha](https://github.com/blacha)
+
+### v0.30.6 - 30th May 2022
+
+* Allow values for `limitInputPixels` larger than 32-bit.
+  [#3238](https://github.com/lovell/sharp/issues/3238)
+
+* Ensure brew-installed `vips` can be detected (regression in 0.30.5).
+  [#3239](https://github.com/lovell/sharp/issues/3239)
+
+### v0.30.5 - 23rd May 2022
+
+* Install: pass `PKG_CONFIG_PATH` via env rather than substitution.
+  [@dwisiswant0](https://github.com/dwisiswant0)
+
+* Add support for `--libc` flag to improve cross-platform installation.
+  [#3160](https://github.com/lovell/sharp/pull/3160)
+  [@joonamo](https://github.com/joonamo)
+
+* Allow installation of prebuilt libvips binaries from filesystem.
+  [#3196](https://github.com/lovell/sharp/pull/3196)
+  [@ankurparihar](https://github.com/ankurparihar)
+
+* Fix rotate-then-extract for EXIF orientation 2.
+  [#3218](https://github.com/lovell/sharp/pull/3218)
+  [@jakob0fischl](https://github.com/jakob0fischl)
+
+### v0.30.4 - 18th April 2022
+
+* Increase control over sensitivity to invalid images via `failOn`, deprecate `failOnError` (equivalent to `failOn: 'warning'`).
+
+* Ensure `create` input image has correct bit depth and colour space.
+  [#3139](https://github.com/lovell/sharp/issues/3139)
+
+* Add support for `TypedArray` input with `byteOffset` and `length`.
+  [#3146](https://github.com/lovell/sharp/pull/3146)
+  [@codepage949](https://github.com/codepage949)
+
+* Improve error message when attempting to render SVG input greater than 32767x32767.
+  [#3167](https://github.com/lovell/sharp/issues/3167)
+
+* Add missing file name to 'Input file is missing' error message.
+  [#3178](https://github.com/lovell/sharp/pull/3178)
+  [@Brodan](https://github.com/Brodan)
+
+### v0.30.3 - 14th March 2022
+
+* Allow `sharpen` options to be provided more consistently as an Object.
+  [#2561](https://github.com/lovell/sharp/issues/2561)
+
+* Expose `x1`, `y2` and `y3` parameters of `sharpen` operation.
+  [#2935](https://github.com/lovell/sharp/issues/2935)
+
+* Prevent double unpremultiply with some composite blend modes (regression in 0.30.2).
+  [#3118](https://github.com/lovell/sharp/issues/3118)
+
+### v0.30.2 - 2nd March 2022
+
+* Improve performance and accuracy when compositing multiple images.
+  [#2286](https://github.com/lovell/sharp/issues/2286)
+
+* Expand pkgconfig search path for wider BSD support.
+  [#3106](https://github.com/lovell/sharp/issues/3106)
+
+* Ensure Windows C++ runtime is linked statically (regression in 0.30.0).
+  [#3110](https://github.com/lovell/sharp/pull/3110)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Temporarily ignore greyscale ICC profiles to workaround lcms bug.
+  [#3112](https://github.com/lovell/sharp/issues/3112)
+
+### v0.30.1 - 9th February 2022
+
+* Allow use of `toBuffer` and `toFile` on the same instance.
+  [#3044](https://github.com/lovell/sharp/issues/3044)
+
+* Skip shrink-on-load for known libjpeg rounding errors.
+  [#3066](https://github.com/lovell/sharp/issues/3066)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Ensure withoutReduction does not interfere with contain/crop/embed.
+  [#3081](https://github.com/lovell/sharp/pull/3081)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Ensure affine interpolator is correctly finalised.
+  [#3083](https://github.com/lovell/sharp/pull/3083)
+  [@kleisauke](https://github.com/kleisauke)
+
+### v0.30.0 - 1st February 2022
+
+* Add support for GIF output to prebuilt binaries.
+
+* Reduce minimum Linux ARM64v8 glibc requirement to 2.17.
+
+* Verify prebuilt binaries with a Subresource Integrity check.
+
+* Standardise WebP `effort` option name, deprecate `reductionEffort`.
+
+* Standardise HEIF `effort` option name, deprecate `speed`.
+
+* Add support for IIIF v3 tile-based output.
+
+* Expose control over CPU effort for palette-based PNG output.
+  [#2541](https://github.com/lovell/sharp/issues/2541)
+
+* Improve animated (multi-page) image resize and extract.
+  [#2789](https://github.com/lovell/sharp/pull/2789)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Expose platform and architecture of vendored binaries as `sharp.vendor`.
+  [#2928](https://github.com/lovell/sharp/issues/2928)
+
+* Ensure 16-bit PNG output uses correct bitdepth.
+  [#2958](https://github.com/lovell/sharp/pull/2958)
+  [@gforge](https://github.com/gforge)
+
+* Properly emit close events for duplex streams.
+  [#2976](https://github.com/lovell/sharp/pull/2976)
+  [@driannaude](https://github.com/driannaude)
+
+* Expose `unlimited` option for SVG and PNG input, switches off safety features.
+  [#2984](https://github.com/lovell/sharp/issues/2984)
+
+* Add `withoutReduction` option to resize operation.
+  [#3006](https://github.com/lovell/sharp/pull/3006)
+  [@christopherbradleybanks](https://github.com/christopherbradleybanks)
+
+* Add `resolutionUnit` as `tiff` option and expose in metadata.
+  [#3023](https://github.com/lovell/sharp/pull/3023)
+  [@ompal-sisodiya](https://github.com/ompal-sisodiya)
+
+* Ensure rotate-then-extract works with EXIF mirroring.
+  [#3024](https://github.com/lovell/sharp/issues/3024)
+
+## v0.29 - *circle*
+
+Requires libvips v8.11.3
+
+### v0.29.3 - 14th November 2021
+
+* Ensure correct dimensions when containing image resized to 1px.
+  [#2951](https://github.com/lovell/sharp/issues/2951)
+
+* Impute TIFF `xres`/`yres` from `density` provided to `withMetadata`.
+  [#2952](https://github.com/lovell/sharp/pull/2952)
+  [@mbklein](https://github.com/mbklein)
+
+### v0.29.2 - 21st October 2021
+
+* Add `timeout` function to limit processing time.
+
+* Ensure `sharp.versions` is populated from vendored libvips.
+
+* Remove animation properties from single page images.
+  [#2890](https://github.com/lovell/sharp/issues/2890)
+
+* Allow use of 'tif' to select TIFF output.
+  [#2893](https://github.com/lovell/sharp/pull/2893)
+  [@erf](https://github.com/erf)
+
+* Improve error message on Windows for version conflict.
+  [#2918](https://github.com/lovell/sharp/pull/2918)
+  [@dkrnl](https://github.com/dkrnl)
+
+* Throw error rather than exit when invalid binaries detected.
+  [#2931](https://github.com/lovell/sharp/issues/2931)
+
+### v0.29.1 - 7th September 2021
+
+* Add `lightness` option to `modulate` operation.
+  [#2846](https://github.com/lovell/sharp/pull/2846)
+
+* Ensure correct PNG bitdepth is set based on number of colours.
+  [#2855](https://github.com/lovell/sharp/issues/2855)
+
+* Ensure background is always premultiplied when compositing.
+  [#2858](https://github.com/lovell/sharp/issues/2858)
+
+* Ensure images with P3 profiles retain full gamut.
+  [#2862](https://github.com/lovell/sharp/issues/2862)
+
+* Add support for libvips compiled with OpenJPEG.
+  [#2868](https://github.com/lovell/sharp/pull/2868)
+
+* Remove unsupported animation properties from AVIF output.
+  [#2870](https://github.com/lovell/sharp/issues/2870)
+
+* Resolve paths before comparing input/output filenames.
+  [#2878](https://github.com/lovell/sharp/pull/2878)
+  [@rexxars](https://github.com/rexxars)
+
+* Allow use of speed 9 (fastest) for HEIF encoding.
+  [#2879](https://github.com/lovell/sharp/pull/2879)
+  [@rexxars](https://github.com/rexxars)
+
+### v0.29.0 - 17th August 2021
+
+* Drop support for Node.js 10, now requires Node.js >= 12.13.0.
+
+* Add `background` property to PNG and GIF image metadata.
+
+* Add `compression` property to HEIF image metadata.
+  [#2504](https://github.com/lovell/sharp/issues/2504)
+
+* AVIF encoding now defaults to `4:4:4` chroma subsampling.
+  [#2562](https://github.com/lovell/sharp/issues/2562)
+
+* Allow multiple platform-arch binaries in same `node_modules` installation tree.
+  [#2575](https://github.com/lovell/sharp/issues/2575)
+
+* Default to single-channel `b-w` space when `extractChannel` is used.
+  [#2658](https://github.com/lovell/sharp/issues/2658)
+
+* Allow installation directory to contain spaces (regression in v0.26.0).
+  [#2777](https://github.com/lovell/sharp/issues/2777)
+
+* Add `pipelineColourspace` operator to set the processing space.
+  [#2704](https://github.com/lovell/sharp/pull/2704)
+  [@Daiz](https://github.com/Daiz)
+
+* Allow bit depth to be set when using raw input and output.
+  [#2762](https://github.com/lovell/sharp/pull/2762)
+  [@mart-jansink](https://github.com/mart-jansink)
+
+* Allow `negate` to act only on non-alpha channels.
+  [#2808](https://github.com/lovell/sharp/pull/2808)
+  [@rexxars](https://github.com/rexxars)
+
+## v0.28 - *bijou*
+
+Requires libvips v8.10.6
+
+### v0.28.3 - 24th May 2021
+
+* Ensure presence of libvips, vendored or global, before invoking node-gyp.
+
+* Skip shrink-on-load for multi-page WebP.
+  [#2714](https://github.com/lovell/sharp/issues/2714)
+
+* Add contrast limiting adaptive histogram equalization (CLAHE) operator.
+  [#2726](https://github.com/lovell/sharp/pull/2726)
+  [@baparham](https://github.com/baparham)
+
+### v0.28.2 - 10th May 2021
+
+* Allow `withMetadata` to set `density`.
+  [#967](https://github.com/lovell/sharp/issues/967)
+
+* Skip shrink-on-load where one dimension <4px.
+  [#2653](https://github.com/lovell/sharp/issues/2653)
+
+* Allow escaped proxy credentials.
+  [#2664](https://github.com/lovell/sharp/pull/2664)
+  [@msalettes](https://github.com/msalettes)
+
+* Add `premultiplied` flag for raw pixel data input.
+  [#2685](https://github.com/lovell/sharp/pull/2685)
+  [@mnutt](https://github.com/mnutt)
+
+* Detect empty input and throw a helpful error.
+  [#2687](https://github.com/lovell/sharp/pull/2687)
+  [@JakobJingleheimer](https://github.com/JakobJingleheimer)
+
+* Add install-time flag to skip version compatibility checks.
+  [#2692](https://github.com/lovell/sharp/pull/2692)
+  [@xemle](https://github.com/xemle)
+
+### v0.28.1 - 5th April 2021
+
+* Ensure all installation errors are logged with a more obvious prefix.
+
+* Allow `withMetadata` to set and update EXIF metadata.
+  [#650](https://github.com/lovell/sharp/issues/650)
+
+* Add support for OME-TIFF Sub Image File Directories (subIFD).
+  [#2557](https://github.com/lovell/sharp/issues/2557)
+
+* Allow `ensureAlpha` to set the alpha transparency level.
+  [#2634](https://github.com/lovell/sharp/issues/2634)
+
+### v0.28.0 - 29th March 2021
+
+* Prebuilt binaries now include mozjpeg and libimagequant (BSD 2-Clause).
+
+* Prebuilt binaries limit AVIF support to the most common 8-bit depth.
+
+* Add `mozjpeg` option to `jpeg` method, sets mozjpeg defaults.
+
+* Reduce the default PNG `compressionLevel` to the more commonly used 6.
+
+* Reduce concurrency on glibc-based Linux when using the default memory allocator to help prevent fragmentation.
+
+* Default missing edge properties of extend operation to zero.
+  [#2578](https://github.com/lovell/sharp/issues/2578)
+
+* Ensure composite does not clip top and left offsets.
+  [#2594](https://github.com/lovell/sharp/pull/2594)
+  [@SHG42](https://github.com/SHG42)
+
+* Improve error handling of network failure at install time.
+  [#2608](https://github.com/lovell/sharp/pull/2608)
+  [@abradley](https://github.com/abradley)
+
+* Ensure `@id` attribute can be set for IIIF tile-based output.
+  [#2612](https://github.com/lovell/sharp/issues/2612)
+  [@edsilv](https://github.com/edsilv)
+
+* Ensure composite replicates the correct number of tiles for centred gravities.
+  [#2626](https://github.com/lovell/sharp/issues/2626)
+
+## v0.27 - *avif*
+
+Requires libvips v8.10.5
+
+### v0.27.2 - 22nd February 2021
+
+* macOS: Prevent use of globally-installed ARM64 libvips with Rosetta x64 emulation.
+  [#2460](https://github.com/lovell/sharp/issues/2460)
+
+* Linux (musl): Prevent use of prebuilt linuxmusl-x64 binaries with musl >= 1.2.0.
+  [#2570](https://github.com/lovell/sharp/issues/2570)
+
+* Improve 16-bit grey+alpha support by using libvips' `has_alpha` detection.
+  [#2569](https://github.com/lovell/sharp/issues/2569)
+
+* Allow the use of non lower case extensions with `toFormat`.
+  [#2581](https://github.com/lovell/sharp/pull/2581)
+  [@florian-busch](https://github.com/florian-busch)
+
+* Allow use of `recomb` operation with single channel input.
+  [#2584](https://github.com/lovell/sharp/issues/2584)
+
+### v0.27.1 - 27th January 2021
+
+* Ensure TIFF is cast when using float predictor.
+  [#2502](https://github.com/lovell/sharp/pull/2502)
+  [@randyridge](https://github.com/randyridge)
+
+* Add support for Uint8Array and Uint8ClampedArray input.
+  [#2511](https://github.com/lovell/sharp/pull/2511)
+  [@leon](https://github.com/leon)
+
+* Revert: ensure all platforms use fontconfig for font rendering.
+  [#2515](https://github.com/lovell/sharp/issues/2515)
+
+* Expose libvips gaussnoise operation to allow creation of Gaussian noise.
+  [#2527](https://github.com/lovell/sharp/pull/2527)
+  [@alza54](https://github.com/alza54)
+
+### v0.27.0 - 22nd December 2020
+
+* Add support for AVIF to prebuilt binaries.
+
+* Remove experimental status from `heif` output, defaults are now AVIF-centric.
+
+* Allow negative top/left offsets for composite operation.
+  [#2391](https://github.com/lovell/sharp/pull/2391)
+  [@CurosMJ](https://github.com/CurosMJ)
+
+* Ensure all platforms use fontconfig for font rendering.
+  [#2399](https://github.com/lovell/sharp/issues/2399)
+
 ## v0.26 - *zoom*
 
 Requires libvips v8.10.0

docs/firebase.json

@@ -4,8 +4,8 @@
     "public": ".",
     "ignore": [
       ".*",
+      "build.js",
       "firebase.json",
-      "*.md",
       "image/**",
       "search-index/**"
     ],
@@ -13,10 +13,9 @@
       {
         "source": "**",
         "headers": [
-          {
-            "key": "Cache-Control",
-            "value": "max-age=86400"
-          }
+          { "key": "Cache-Control", "value": "max-age=86400" },
+          { "key": "X-Content-Type-Options", "value": "nosniff" },
+          { "key": "X-Frame-Options", "value": "SAMEORIGIN" }
         ]
       }
     ],

docs/humans.txt

@@ -206,3 +206,72 @@ GitHub: https://github.com/stefanprobst
 
 Name: Thomas Beiganz
 GitHub: https://github.com/beig
+
+Name: Florian Busch
+GitHub: https://github.com/florian-busch
+
+Name: Matthieu Salettes
+GitHub: https://github.com/msalettes
+
+Name: Taneli Vatanen
+GitHub: https://github.com/Daiz
+
+Name: Mart Jansink
+GitHub: https://github.com/mart-jansink
+
+Name: Tenpi
+GitHub: https://github.com/Tenpi
+
+Name: Zaruike
+GitHub: https://github.com/Zaruike
+
+Name: Erlend F
+GitHub: https://github.com/erf
+
+Name: Drian Naude
+GitHub: https://github.com/driannaude
+
+Name: Max Gordon
+GitHub: https://github.com/gforge
+
+Name: Chris Banks
+GitHub: https://github.com/christopherbradleybanks
+
+Name: codepage949
+GitHub: https://github.com/codepage949
+
+Name: Chris Hranj
+GitHub: https://github.com/Brodan
+
+Name: Ankur Parihar
+GitHub: https://github.com/ankurparihar
+
+Name: Joona Heinikoski
+GitHub: https://github.com/joonamo
+
+Name: AlexanderTheGrey
+GitHub: https://github.com/AlexanderTheGrey
+
+Name: Blayne Chard
+GitHub: https://github.com/blacha
+
+Name: Brahim
+GitHub: https://github.com/brahima
+
+Name: Anton Marsden
+GitHub: https://github.com/antonmarsden
+
+Name:  Marcos Casagrande
+GitHub: https://github.com/marcosc90
+
+Name: Emanuel Jöbstl
+GitHub: https://github.com/ejoebstl
+
+Name: Tomasz Janowski
+GitHub: https://github.com/janaz
+
+Name: Lachlan Newman
+GitHub: https://github.com/LachlanNewman
+
+Name: BJJ
+GitHub: https://github.com/bianjunjie1981

docs/image/api-resize-fit.svg

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="998" height="243" viewBox="0 0 998 243">
+  <defs>
+    <g id="placeholder">
+      <rect width="180" height="128" fill="#64bed8"/>
+      <circle cx="61.1" cy="36.8" r="19.3" fill="#ffefa9"/>
+      <circle cx="61.1" cy="36.8" r="18.1" fill="#fdda42"/>
+      <path d="m67.2 34.7 15.2 46L90 57.9l30.4 38 7.8-15.2 7.5 15.4H44z" fill="#6a696f"/>
+      <path d="m82.4 80.7-15.2-46-.3 69h22.9z" fill="#474749"/>
+      <path d="m90.1 58 12.2 15 18.2 23-13.9.1z" fill="#474749"/>
+      <path d="M135.8 96H131l-2.8-15.3z" fill="#474749"/>
+      <path d="M35.2 96h107.1c0 1.7-1.4 3.2-3.2 3.2H38.4a3.2 3.2 0 0 1-3.2-3.2z" fill="#b9c861"/>
+      <path d="m67.2 34.7-.1 31-6.2-3-5.3 2.7z" fill="#fff"/>
+      <path d="m67.2 34.7 7.6 23-7.7 8z" fill="#b3b1b4"/>
+      <rect width="30.8" height="7.7" x="71.1" y="27.2" rx="2.8" ry="4.1" fill="#fff"/>
+      <rect width="30.8" height="7.7" x="82.2" y="34.8" rx="2.8" ry="4.1" fill="#fff"/>
+      <rect width="30.8" height="7.7" x="36.2" y="19.6" rx="2.8" ry="4.1" fill="#fff"/>
+      <path d="m89.6 72.8-7.2 7.9L90 57.9l10 23z" fill="#fff"/>
+      <path d="m90.1 58 10 23 2.2-8z" fill="#b3b1b4"/>
+      <path d="M131.2 85.2 137 68l9 17.2-8 6z" fill="#8da128"/>
+      <rect width="109.4" height="6.8" x="33.9" y="99.1" rx="13.2" ry="11.4" fill="#22b0d6"/>
+      <path d="m137 68-5.8 17.2 6.8 6.1.3-13.7z" fill="#727d2e"/>
+      <rect width="83.3" height="6.8" x="50.8" y="103.6" rx="10" ry="11.4" fill="#22b0d6"/>
+      <rect width=".7" height="18.4" x="138" y="77.6" fill="#585657"/>
+      <rect width=".5" height="5.2" x="2" y="-161.3" fill="#585657" transform="rotate(120)"/>
+      <rect width=".5" height="5.3" x="5.5" y="-163.3" fill="#585657" transform="rotate(120)"/>
+      <rect width=".5" height="4.8" x="-142.4" y="77.7" fill="#585657" transform="rotate(240)"/>
+      <rect width=".5" height="5.1" x="-146" y="75.6" fill="#585657" transform="rotate(240)"/>
+    </g>
+    <pattern id="img" height="100%" width="100%" viewBox="0 0 180 128">
+      <use xlink:href="#placeholder"/>
+    </pattern>
+    <pattern id="img-fill" width="100%" height="100%" viewBox="0 0 180 128" preserveAspectRatio="none">
+      <use xlink:href="#placeholder"/>
+    </pattern>
+  </defs>
+  <rect x="0" y="0" width="998" height="243" fill="#ddd"/>
+  <g id="cover">
+    <rect x="22" y="28" width="180" height="132" fill="url(#img)"/>
+    <rect x="48" y="30" width="128" height="128" fill="none" stroke="#000" stroke-width="4"/>
+    <text x="112" y="85%" dominant-baseline="middle" text-anchor="middle" font-family="sans" font-size="32" font-weight="bold">cover</text>
+  </g>
+  <g id="contain">
+    <rect x="240" y="30" width="128" height="128" fill="url(#img)" stroke="#000" stroke-width="4"/>
+    <text x="304" y="85%" dominant-baseline="middle" text-anchor="middle" font-family="sans" font-size="32" font-weight="bold" fill="#555">contain</text>
+  </g>
+  <g id="fill">
+    <rect x="432" y="30" width="128" height="128" fill="url(#img-fill)" stroke="#000" stroke-width="4"/>
+    <text x="496" y="85%" dominant-baseline="middle" text-anchor="middle" font-family="sans" font-size="32" font-weight="bold">fill</text>
+  </g>
+  <g id="inside">
+    <rect x="624" y="48" width="128" height="92" fill="url(#img)" stroke="#000" stroke-width="4"/>
+    <rect x="624" y="30" width="128" height="128" fill="none" stroke="#000" stroke-width="4" stroke-dasharray="12 4" stroke-dashoffset="6"/>
+    <text x="688" y="85%" dominant-baseline="middle" text-anchor="middle" font-family="sans" font-size="32" font-weight="bold" fill="#555">inside</text>
+  </g>
+  <g id="outside">
+    <rect x="792" y="30" width="176" height="128" fill="url(#img)" stroke="#000" stroke-width="4"/>
+    <rect x="816" y="30" width="128" height="128" fill="none" stroke="#000" stroke-width="4" stroke-dasharray="12 4" stroke-dashoffset="-2"/>
+    <text x="880" y="85%" dominant-baseline="middle" text-anchor="middle" font-family="sans" font-size="32" font-weight="bold">outside</text>
+  </g>
+</svg>

docs/image/sharp-logo-mono.svg

@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="86 86 550 550">
+<!-- Creative Commons CC0 1.0 Universal Public Domain Dedication -->
+  <defs>
+    <mask id="c">
+      <path fill="none" stroke="#fff" stroke-width="80" d="M258.411 285.777l200.176-26.8M244.113 466.413L451.44 438.66m.001 0V238.484m0-150.121v171.572l178.725-23.917m-359.843 19.584V477.22m2.387 156.95V462.591L93.984 486.515"/>
+      <path fill="none" stroke="#000" stroke-width="112" d="M451.441 610.246V438.66l178.725-23.91M269.688 112.59v171.58L90.964 308.093"/>
+    </mask>
+  </defs>
+  <path mask="url(#c)" fill="none" stroke="#000" stroke-width="80" d="M258.411 285.777l200.176-26.8M244.113 466.413L451.44 438.66m.001 0V238.484m0-150.121v171.572l178.725-23.917m-359.843 19.584V477.22m2.387 156.95V462.591L93.984 486.515"/>
+  <path fill="none" stroke="#000" stroke-width="80" d="M451.441 610.246V438.66l178.725-23.91M269.688 112.59v171.58L90.964 308.093"/>
+</svg>

docs/image/sharp-logo.svg

@@ -1,5 +1,5 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="86 86 550 550">
-<!-- Copyright 2019 Lovell Fuller. This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License. -->
+<!-- Creative Commons CC0 1.0 Universal Public Domain Dedication -->
 <path fill="none" stroke="#9c0" stroke-width="80" d="M258.411 285.777l200.176-26.8M244.113 466.413L451.44 438.66M451.441 438.66V238.484M451.441 88.363v171.572l178.725-23.917M270.323 255.602V477.22M272.71 634.17V462.591L93.984 486.515"/>
 <path fill="none" stroke="#090" stroke-width="80" d="M451.441 610.246V438.66l178.725-23.91M269.688 112.59v171.58L90.964 308.093"/>
 </svg>

docs/install.md

@@ -8,68 +8,46 @@ npm install sharp
 yarn add sharp
 ```
 
+```sh
+pnpm add sharp
+```
+
 ## Prerequisites
 
-* Node.js v10+
+* Node.js >= 18.17.0
 
 ## Prebuilt binaries
 
-Ready-compiled sharp and libvips binaries are provided for use with
-Node.js v10+ on the most common platforms:
+Ready-compiled sharp and libvips binaries are provided for use on the most common platforms:
 
 * macOS x64 (>= 10.13)
-* Linux x64 (glibc >= 2.17, musl >= 1.1.24)
-* Linux ARM64 (glibc >= 2.29)
-* Windows
-
-A 7-8MB tarball containing libvips and its most commonly used dependencies
-is downloaded via HTTPS and stored within `node_modules/sharp/vendor` during `npm install`.
+* macOS ARM64
+* Linux x64 (glibc >= 2.26, musl >= 1.2.2, CPU with SSE4.2)
+* Linux ARM64 (glibc >= 2.26, musl >= 1.2.2)
+* Linux ARM (glibc >= 2.28)
+* Windows x64
+* Windows x86
 
 This provides support for the
-JPEG, PNG, WebP, TIFF, GIF (input) and SVG (input) image formats.
-
-The following platforms have prebuilt libvips but not sharp:
-
-* Linux ARMv6
-* Linux ARMv7 (glibc >= 2.28)
-
-The following platforms require compilation of both libvips and sharp from source:
-
-* Linux x86
-* Linux x64 (glibc <= 2.16, includes RHEL/CentOS 6)
-* Linux ARM64 (glibc <= 2.28, musl)
-* Linux PowerPC
-* FreeBSD
-* OpenBSD
-
-## Common problems
-
-The architecture and platform of Node.js used for `npm install`
-must be the same as the architecture and platform of Node.js used at runtime.
-
-The `npm install --unsafe-perm` flag must be used when installing as `root` or a `sudo` user.
-
-The `npm install --ignore-scripts=false` flag must be used when `npm` has been configured to ignore installation scripts.
-
-Check the output of running `npm install --verbose sharp` for useful error messages.
+JPEG, PNG, WebP, AVIF (limited to 8-bit depth), TIFF, GIF and SVG (input) image formats.
 
 ## Custom libvips
 
 To use a custom, globally-installed version of libvips instead of the provided binaries,
-make sure it is at least the version listed under `config.libvips` in the `package.json` file
+make sure it is at least the version listed under `engines.libvips` in the `package.json` file
 and that it can be located using `pkg-config --modversion vips-cpp`.
 
-For help compiling libvips from source, please see
-[https://libvips.github.io/libvips/install.html#building-libvips-from-a-source-tarball](https://libvips.github.io/libvips/install.html#building-libvips-from-a-source-tarball).
+For help compiling libvips and its dependencies, please see
+[building libvips from source](https://www.libvips.org/install.html#building-libvips-from-source).
 
-The use of a globally-installed libvips is unsupported on Windows.
+The use of a globally-installed libvips is unsupported on Windows
+and on macOS when running Node.js under Rosetta.
 
 ## Building from source
 
 This module will be compiled from source at `npm install` time when:
 
-* a globally-installed libvips is detected (set the `SHARP_IGNORE_GLOBAL_LIBVIPS` environment variable to skip this),
-* prebuilt binaries do not exist for the current platform and Node.js version, or
+* a globally-installed libvips is detected (set the `SHARP_IGNORE_GLOBAL_LIBVIPS` environment variable to skip this), or
 * when the `npm install --build-from-source` flag is used.
 
 Building from source requires:
@@ -77,48 +55,11 @@ Building from source requires:
 * C++11 compiler
 * [node-gyp](https://github.com/nodejs/node-gyp#installation) and its dependencies
 
-## Custom prebuilt binaries
+If `node-gyp` cannot be found, try adding it to `devDependencies`.
 
-This is an advanced approach that most people will not require.
-
-To install the prebuilt sharp binaries from a custom URL,
-set the `sharp_binary_host` npm config option
-or the `npm_config_sharp_binary_host` environment variable.
-
-To install the prebuilt libvips binaries from a custom URL,
-set the `sharp_libvips_binary_host` npm config option
-or the `npm_config_sharp_libvips_binary_host` environment variable.
-
-The version subpath and file name are appended to these. There should be tarballs available
-that are compressed with both gzip and Brotli, as the format downloaded will vary depending
-on whether the user's version of Node supports Brotli decompression (Node.js v10.16.0+)
-
-For example, if `sharp_libvips_binary_host` is set to `https://hostname/path`
-and the libvips version is `1.2.3` then the resultant URL will be
-`https://hostname/path/v1.2.3/libvips-1.2.3-platform-arch.tar.br` or 
-`https://hostname/path/v1.2.3/libvips-1.2.3-platform-arch.tar.gz`.
-
-See the Chinese mirror below for a further example.
-
-## Chinese mirror
-
-Alibaba provide a mirror site based in China containing binaries for both sharp and libvips.
-
-To use this either set the following configuration:
-
-```sh
-npm config set sharp_binary_host "https://npm.taobao.org/mirrors/sharp"
-npm config set sharp_libvips_binary_host "https://npm.taobao.org/mirrors/sharp-libvips"
-npm install sharp
-```
-
-or set the following environment variables:
-
-```sh
-npm_config_sharp_binary_host="https://npm.taobao.org/mirrors/sharp" \
-  npm_config_sharp_libvips_binary_host="https://npm.taobao.org/mirrors/sharp-libvips" \
-  npm install sharp
-```
+For cross-compiling, the `--platform`, `--arch` and `--libc` npm flags
+(or the `npm_config_platform`, `npm_config_arch` and `npm_config_libc` environment variables)
+can be used to configure the target environment.
 
 ## FreeBSD
 
@@ -132,52 +73,147 @@ pkg install -y pkgconf vips
 cd /usr/ports/graphics/vips/ && make install clean
 ```
 
-## Heroku
+## Linux memory allocator
 
-Add the
-[jemalloc buildpack](https://github.com/gaffneyc/heroku-buildpack-jemalloc)
-to reduce the effects of memory fragmentation.
+The default memory allocator on most glibc-based Linux systems
+(e.g. Debian, Red Hat) is unsuitable for long-running, multi-threaded
+processes that involve lots of small memory allocations.
 
-Set
-[NODE_MODULES_CACHE](https://devcenter.heroku.com/articles/nodejs-support#cache-behavior)
-to `false` when using the `yarn` package manager.
+For this reason, by default, sharp will limit the use of thread-based
+[concurrency](api-utility#concurrency) when the glibc allocator is
+detected at runtime.
+
+To help avoid fragmentation and improve performance on these systems,
+the use of an alternative memory allocator such as
+[jemalloc](https://github.com/jemalloc/jemalloc) is recommended.
+
+Those using musl-based Linux (e.g. Alpine) and non-Linux systems are
+unaffected.
 
 ## AWS Lambda
 
-Set the Lambda runtime to `nodejs12.x`.
-
-The binaries in the `node_modules` directory of the
+The `node_modules` directory of the
 [deployment package](https://docs.aws.amazon.com/lambda/latest/dg/nodejs-package.html)
-must be for the Linux x64 platform.
+must include binaries for either the linux-x64 or linux-arm64 platforms
+depending on the chosen architecture.
 
-When building your deployment package on machines other than Linux x64 (glibc),
-run the following commands:
+When building your deployment package on a machine that differs from the target architecture,
+you will need to install either `@sharpen/sharp-linux-x64` or `@sharpen/sharp-linux-arm64` package.
 
-macOS:
 ```sh
-rm -rf node_modules/sharp
-SHARP_IGNORE_GLOBAL_LIBVIPS=1 npm install --arch=x64 --platform=linux sharp
+npm install --force @sharpen/sharp-linux-x64
 ```
 
-Windows:
 ```sh
-rmdir /s /q node_modules/sharp
-npm install --arch=x64 --platform=linux sharp
-```
-
-Alternatively a Docker container closely matching the Lambda runtime can be used:
-
-```sh
-rm -rf node_modules/sharp
-docker run -v "$PWD":/var/task lambci/lambda:build-nodejs12.x npm install sharp
+npm install --force @sharpen/sharp-linux-arm64
 ```
 
 To get the best performance select the largest memory available.
 A 1536 MB function provides ~12x more CPU time than a 128 MB function.
 
+When integrating with AWS API Gateway, ensure it is configured with the relevant
+[binary media types](https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-payload-encodings.html).
+
+## Bundlers
+
+### webpack
+
+Ensure sharp is excluded from bundling via the
+[externals](https://webpack.js.org/configuration/externals/)
+configuration.
+
+```js
+externals: {
+  'sharp': 'commonjs sharp'
+}
+```
+
+### esbuild
+
+Ensure sharp is excluded from bundling via the
+[external](https://esbuild.github.io/api/#external)
+configuration.
+
+```js
+buildSync({
+  entryPoints: ['app.js'],
+  bundle: true,
+  platform: 'node',
+  external: ['sharp'],
+})
+```
+
+```sh
+esbuild app.js --bundle --platform=node --external:sharp
+```
+
+For `serverless-esbuild`, ensure platform-specific binaries are installed
+via the `serverless.yml` configuration.
+
+```yaml
+custom:
+  esbuild:
+    external:
+      - sharp
+    packagerOptions:
+      scripts:
+        - npm install --force @sharpen/sharp-linux-x64
+```
+
+## TypeScript
+
+TypeScript definitions are published as part of
+the `sharp` package from v0.32.0.
+
+Previously these were available via the `@types/sharp` package,
+which is now deprecated.
+
+When using Typescript, please ensure `devDependencies` includes
+the `@types/node` package.
+
+## Fonts
+
+When creating text images or rendering SVG images that contain text elements,
+`fontconfig` is used to find the relevant fonts.
+
+On Windows and macOS systems, all system fonts are available for use.
+
+On macOS systems using Homebrew, you may need to set the
+`PANGOCAIRO_BACKEND` environment variable to a value of `fontconfig`
+to ensure it is used for font discovery instead of Core Text.
+
+On Linux systems, fonts that include the relevant
+[`fontconfig` configuration](https://www.freedesktop.org/software/fontconfig/fontconfig-user.html)
+when installed via package manager are available for use.
+
+If `fontconfig` configuration is not found, the following error will occur:
+```
+Fontconfig error: Cannot load default config file
+```
+
+In serverless environments where there is no control over font packages,
+use the `FONTCONFIG_PATH` environment variable to point to a custom location.
+
+Embedded SVG fonts are unsupported.
+
 ## Worker threads
 
-The main thread must call `require('sharp')`
-before worker threads are created
-to ensure shared libraries remain loaded in memory
+On some platforms, including glibc-based Linux,
+the main thread must call `require('sharp')`
+_before_ worker threads are created.
+This is to ensure shared libraries remain loaded in memory
 until after all threads are complete.
+
+Without this, the following error may occur:
+```
+Module did not self-register
+```
+
+## Known conflicts
+
+### Canvas and Windows
+
+If both `canvas` and `sharp` modules are used in the same Windows process, the following error may occur:
+```
+The specified procedure could not be found.
+```

docs/performance.md

@@ -2,67 +2,110 @@
 
 A test to benchmark the performance of this module relative to alternatives.
 
-## The contenders
+Greater libvips performance can be expected with caching enabled (default)
+and using 8+ core machines, especially those with larger L1/L2 CPU caches.
 
-* [jimp](https://www.npmjs.com/package/jimp) v0.16.0 - Image processing in pure JavaScript. Provides bicubic interpolation.
-* [mapnik](https://www.npmjs.org/package/mapnik) v4.5.2 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
+The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
+
+## Contenders
+
+* [jimp](https://www.npmjs.com/package/jimp) v0.22.7 - Image processing in pure JavaScript.
 * [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
-* [gm](https://www.npmjs.com/package/gm) v1.23.1 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
-* sharp v0.26.0 / libvips v8.10.0 - Caching within libvips disabled to ensure a fair comparison.
+* [gm](https://www.npmjs.com/package/gm) v1.25.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
+* [@squoosh/lib](https://www.npmjs.com/package/@squoosh/lib) v0.4.0 - Image libraries transpiled to WebAssembly, includes GPLv3 code, but "*Project no longer maintained*".
+* [@squoosh/cli](https://www.npmjs.com/package/@squoosh/cli) v0.7.3 - Command line wrapper around `@squoosh/lib`, avoids GPLv3 by spawning process, but "*Project no longer maintained*".
+* sharp v0.32.0 / libvips v8.14.2 - Caching within libvips disabled to ensure a fair comparison.
 
-## The task
+## Environment
+
+### AMD64
+
+* AWS EC2 us-east-2 [c6a.xlarge](https://aws.amazon.com/ec2/instance-types/c6a/) (4x AMD EPYC 7R13)
+* Ubuntu 22.04 20230303 (ami-0122295b0eb922138)
+* Node.js 16.19.1
+
+### ARM64
+
+* AWS EC2 us-east-2 [c7g.xlarge](https://aws.amazon.com/ec2/instance-types/c7g/) (4x ARM Graviton3)
+* Ubuntu 22.04 20230303 (ami-0af198159897e7a29)
+* Node.js 16.19.1
+
+## Task: JPEG
 
 Decompress a 2725x2225 JPEG image,
 resize to 720x588 using Lanczos 3 resampling (where available),
 then compress to JPEG at a "quality" setting of 80.
 
-## Test environment
+Note: jimp does not support Lanczos 3, bicubic resampling used instead.
 
-* AWS EC2 eu-west-1 [c5d.large](https://aws.amazon.com/ec2/instance-types/c5/) (2x Xeon Platinum 8124M CPU @ 3.00GHz)
-* Ubuntu 20.04 (ami-0f1d11c92a9467c07)
-* Node.js v14.8.0
-
-## Results
+#### Results: JPEG (AMD64)
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |
-| jimp               | buffer | buffer |    0.75 |      1.0 |
-| mapnik             | buffer | buffer |    3.00 |      4.0 |
-| gm                 | buffer | buffer |    4.12 |      5.5 |
-| gm                 | file   | file   |    4.13 |      5.5 |
-| imagemagick        | file   | file   |    4.30 |      5.7 |
-| sharp              | stream | stream |   22.37 |     29.8 |
-| sharp              | file   | file   |   23.40 |     31.2 |
-| sharp              | buffer | buffer |   24.01 |     32.0 |
+| jimp               | buffer | buffer |    0.84 |      1.0 |
+| squoosh-cli        | file   | file   |    1.07 |      1.3 |
+| squoosh-lib        | buffer | buffer |    1.82 |      2.2 |
+| gm                 | buffer | buffer |    8.41 |     10.0 |
+| gm                 | file   | file   |    8.45 |     10.0 |
+| imagemagick        | file   | file   |    8.77 |     10.4 |
+| sharp              | stream | stream |   36.36 |     43.3 |
+| sharp              | file   | file   |   38.67 |     46.0 |
+| sharp              | buffer | buffer |   39.44 |     47.0 |
 
-Greater libvips performance can be expected with caching enabled (default)
-and using 4+ core machines, especially those with larger L1/L2 CPU caches.
+#### Results: JPEG (ARM64)
 
-The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
+| Module             | Input  | Output | Ops/sec | Speed-up |
+| :----------------- | :----- | :----- | ------: | -------: |
+| jimp               | buffer | buffer |    1.02 |      1.0 |
+| squoosh-cli        | file   | file   |    1.11 |      1.1 |
+| squoosh-lib        | buffer | buffer |    2.08 |      2.0 |
+| gm                 | buffer | buffer |    8.80 |      8.6 |
+| gm                 | file   | file   |   10.05 |      9.9 |
+| imagemagick        | file   | file   |   10.28 |     10.1 |
+| sharp              | stream | stream |   26.87 |     26.3 |
+| sharp              | file   | file   |   27.88 |     27.3 |
+| sharp              | buffer | buffer |   28.40 |     27.8 |
+
+## Task: PNG
+
+Decompress a 2048x1536 RGBA PNG image,
+premultiply the alpha channel,
+resize to 720x540 using Lanczos 3 resampling (where available),
+unpremultiply then compress as PNG with a "default" zlib compression level of 6
+and without adaptive filtering.
+
+Note: jimp does not support premultiply/unpremultiply.
+
+### Results: PNG (AMD64)
+
+| Module             | Input  | Output | Ops/sec | Speed-up |
+| :----------------- | :----- | :----- | ------: | -------: |
+| squoosh-cli        | file   | file   |    0.40 |      1.0 |
+| squoosh-lib        | buffer | buffer |    0.47 |      1.2 |
+| gm                 | file   | file   |    6.47 |     16.2 |
+| jimp               | buffer | buffer |    6.60 |     16.5 |
+| imagemagick        | file   | file   |    7.08 |     17.7 |
+| sharp              | file   | file   |   17.80 |     44.5 |
+| sharp              | buffer | buffer |   18.02 |     45.0 |
+
+### Results: PNG (ARM64)
+
+| Module             | Input  | Output | Ops/sec | Speed-up |
+| :----------------- | :----- | :----- | ------: | -------: |
+| squoosh-cli        | file   | file   |    0.40 |      1.0 |
+| squoosh-lib        | buffer | buffer |    0.48 |      1.2 |
+| gm                 | file   | file   |    7.20 |     18.0 |
+| jimp               | buffer | buffer |    7.62 |     19.1 |
+| imagemagick        | file   | file   |    7.96 |     19.9 |
+| sharp              | file   | file   |   12.97 |     32.4 |
+| sharp              | buffer | buffer |   13.12 |     32.8 |
 
 ## Running the benchmark test
 
-Requires _ImageMagick_, _GraphicsMagick_ and _Mapnik_:
-
-```sh
-brew install imagemagick
-brew install graphicsmagick
-brew install mapnik
-```
-
-```sh
-sudo apt-get install imagemagick libmagick++-dev graphicsmagick libmapnik-dev
-```
-
-```sh
-sudo yum install ImageMagick-devel ImageMagick-c++-devel GraphicsMagick mapnik-devel
-```
+Requires Docker.
 
 ```sh
 git clone https://github.com/lovell/sharp.git
-cd sharp
-npm install
-cd test/bench
-npm install
-npm test
+cd sharp/test/bench
+./run-with-docker.sh
 ```

docs/search-index/build.js

@@ -1,15 +1,18 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const fs = require('fs');
 const path = require('path');
-const { extractDescription, extractKeywords } = require('./extract');
+const { extractDescription, extractKeywords, extractParameters } = require('./extract');
 
 const searchIndex = [];
 
 // Install
 const contents = fs.readFileSync(path.join(__dirname, '..', 'install.md'), 'utf8');
 const matches = contents.matchAll(
-  /## (?<title>[A-Za-z ]+)\n\n(?<body>[^#]+)/gs
+  /## (?<title>[A-Za-z0-9 ]+)\n\n(?<body>[^#]+)/gs
 );
 for (const match of matches) {
   const { title, body } = match.groups;
@@ -37,18 +40,19 @@ for (const match of matches) {
 ].forEach((section) => {
   const contents = fs.readFileSync(path.join(__dirname, '..', `api-${section}.md`), 'utf8');
   const matches = contents.matchAll(
-    /\n## (?<title>[A-Za-z]+)\n\n(?<firstparagraph>.+?)\n\n/gs
+    /## (?<title>[A-Za-z]+)\n[^\n]+\n(?<firstparagraph>.+?)\n\n.+?(?<parameters>\| Param .+?\n\n)?\*\*Example/gs
   );
   for (const match of matches) {
-    const { title, firstparagraph } = match.groups;
+    const { title, firstparagraph, parameters } = match.groups;
     const description = firstparagraph.startsWith('###')
       ? 'Constructor'
       : extractDescription(firstparagraph);
+    const parameterNames = parameters ? extractParameters(parameters) : '';
 
     searchIndex.push({
       t: title,
       d: description,
-      k: extractKeywords(`${title} ${description}`),
+      k: extractKeywords(`${title} ${description} ${parameterNames}`),
       l: `/api-${section}#${title.toLowerCase()}`
     });
   }

docs/search-index/extract.js

@@ -1,24 +1,34 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const stopWords = require('./stop-words');
 
 const extractDescription = (str) =>
   str
+    .replace(/### Examples.*/sg, '')
     .replace(/\(http[^)]+/g, '')
     .replace(/\s+/g, ' ')
     .replace(/[^A-Za-z0-9_/\-,. ]/g, '')
     .replace(/\s+/g, ' ')
-    .substr(0, 140)
+    .substring(0, 200)
     .trim();
 
+const extractParameters = (str) =>
+  [...str.matchAll(/options\.(?<name>[^.`\] ]+)/gs)]
+    .map((match) => match.groups.name)
+    .map((name) => name.replace(/([A-Z])/g, ' $1').toLowerCase())
+    .join(' ');
+
 const extractKeywords = (str) =>
   [
     ...new Set(
       str
         .split(/[ -/]/)
         .map((word) => word.toLowerCase().replace(/[^a-z]/g, ''))
-        .filter((word) => word.length > 2 && !stopWords.includes(word))
+        .filter((word) => word.length > 2 && word.length < 15 && !stopWords.includes(word))
     )
   ].join(' ');
 
-module.exports = { extractDescription, extractKeywords };
+module.exports = { extractDescription, extractKeywords, extractParameters };

docs/search-index/stop-words.js

@@ -1,24 +1,44 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 module.exports = [
   'about',
   'after',
   'all',
+  'allows',
   'already',
+  'also',
   'alternative',
   'always',
   'and',
   'any',
   'are',
+  'available',
+  'based',
   'been',
   'before',
+  'best',
+  'both',
+  'call',
+  'callback',
   'can',
   'containing',
+  'contains',
+  'created',
+  'current',
+  'date',
   'default',
   'does',
   'each',
   'either',
+  'ensure',
+  'entirely',
   'etc',
+  'every',
+  'except',
+  'following',
   'for',
   'from',
   'get',
@@ -28,7 +48,15 @@ module.exports = [
   'have',
   'how',
   'image',
+  'implies',
+  'include',
+  'including',
+  'involve',
   'its',
+  'last',
+  'least',
+  'lots',
+  'make',
   'may',
   'more',
   'most',
@@ -36,36 +64,72 @@ module.exports = [
   'must',
   'non',
   'not',
+  'now',
   'occur',
   'occurs',
+  'one',
+  'options',
+  'other',
+  'out',
   'over',
+  'part',
   'perform',
   'performs',
+  'please',
+  'pre',
+  'previously',
+  'produce',
   'provide',
   'provided',
+  'ready',
+  'requires',
+  'requiresharp',
+  'returned',
+  'run',
+  'same',
+  'see',
   'set',
   'sets',
+  'sharp',
   'should',
+  'since',
+  'site',
+  'some',
+  'specified',
   'spelling',
+  'such',
   'support',
   'supported',
+  'sure',
   'take',
+  'task',
+  'than',
   'that',
   'the',
   'their',
+  'then',
   'there',
   'therefore',
   'these',
   'this',
+  'under',
+  'unless',
+  'unmaintained',
+  'unsuitable',
+  'until',
   'use',
   'used',
   'using',
   'value',
   'values',
+  'via',
+  'were',
   'when',
   'which',
   'while',
   'will',
   'with',
-  'without'
+  'without',
+  'you',
+  'your'
 ];

install/check.js

@@ -0,0 +1,27 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+const { useGlobalLibvips, globalLibvipsVersion, log, gypRebuild } = require('../lib/libvips');
+
+const buildFromSource = (msg) => {
+  log(msg);
+  log('Attempting to build from source via node-gyp');
+  try {
+    require('node-gyp');
+  } catch (err) {
+    log('You might need to install node-gyp');
+  }
+  log('See https://sharp.pixelplumbing.com/install#building-from-source');
+  const status = gypRebuild();
+  if (status !== 0) {
+    process.exit(status);
+  }
+};
+
+if (useGlobalLibvips()) {
+  buildFromSource(`Detected globally-installed libvips v${globalLibvipsVersion()}`);
+} else if (process.env.npm_config_build_from_source) {
+  buildFromSource('Detected --build-from-source flag');
+}

install/dll-copy.js

@@ -1,37 +0,0 @@
-'use strict';
-
-const fs = require('fs');
-const path = require('path');
-
-const libvips = require('../lib/libvips');
-const npmLog = require('npmlog');
-
-const minimumLibvipsVersion = libvips.minimumLibvipsVersion;
-
-const platform = process.env.npm_config_platform || process.platform;
-if (platform === 'win32') {
-  const buildDir = path.join(__dirname, '..', 'build');
-  const buildReleaseDir = path.join(buildDir, 'Release');
-  npmLog.info('sharp', `Creating ${buildReleaseDir}`);
-  try {
-    libvips.mkdirSync(buildDir);
-    libvips.mkdirSync(buildReleaseDir);
-  } catch (err) {}
-  const vendorLibDir = path.join(__dirname, '..', 'vendor', minimumLibvipsVersion, 'lib');
-  npmLog.info('sharp', `Copying DLLs from ${vendorLibDir} to ${buildReleaseDir}`);
-  try {
-    fs
-      .readdirSync(vendorLibDir)
-      .filter(function (filename) {
-        return /\.dll$/.test(filename);
-      })
-      .forEach(function (filename) {
-        fs.copyFileSync(
-          path.join(vendorLibDir, filename),
-          path.join(buildReleaseDir, filename)
-        );
-      });
-  } catch (err) {
-    npmLog.error('sharp', err.message);
-  }
-}

install/libvips.js

@@ -1,134 +0,0 @@
-'use strict';
-
-const fs = require('fs');
-const os = require('os');
-const path = require('path');
-const stream = require('stream');
-const zlib = require('zlib');
-
-const detectLibc = require('detect-libc');
-const npmLog = require('npmlog');
-const semver = require('semver');
-const simpleGet = require('simple-get');
-const tarFs = require('tar-fs');
-
-const agent = require('../lib/agent');
-const libvips = require('../lib/libvips');
-const platform = require('../lib/platform');
-
-const minimumGlibcVersionByArch = {
-  arm: '2.28',
-  arm64: '2.29',
-  x64: '2.17'
-};
-
-const { minimumLibvipsVersion, minimumLibvipsVersionLabelled } = libvips;
-const distHost = process.env.npm_config_sharp_libvips_binary_host || 'https://github.com/lovell/sharp-libvips/releases/download';
-const distBaseUrl = process.env.npm_config_sharp_dist_base_url || process.env.SHARP_DIST_BASE_URL || `${distHost}/v${minimumLibvipsVersionLabelled}/`;
-const supportsBrotli = ('BrotliDecompress' in zlib);
-
-const fail = function (err) {
-  npmLog.error('sharp', err.message);
-  if (err.code === 'EACCES') {
-    npmLog.info('sharp', 'Are you trying to install as a root or sudo user? Try again with the --unsafe-perm flag');
-  }
-  npmLog.info('sharp', 'Attempting to build from source via node-gyp but this may fail due to the above error');
-  npmLog.info('sharp', 'Please see https://sharp.pixelplumbing.com/install for required dependencies');
-  process.exit(1);
-};
-
-const extractTarball = function (tarPath) {
-  const vendorPath = path.join(__dirname, '..', 'vendor');
-  libvips.mkdirSync(vendorPath);
-  const versionedVendorPath = path.join(vendorPath, minimumLibvipsVersion);
-  libvips.mkdirSync(versionedVendorPath);
-  stream.pipeline(
-    fs.createReadStream(tarPath),
-    supportsBrotli ? new zlib.BrotliDecompress() : new zlib.Gunzip(),
-    tarFs.extract(versionedVendorPath),
-    function (err) {
-      if (err) {
-        if (/unexpected end of file/.test(err.message)) {
-          npmLog.error('sharp', `Please delete ${tarPath} as it is not a valid tarball`);
-        }
-        fail(err);
-      }
-    }
-  );
-};
-
-try {
-  const useGlobalLibvips = libvips.useGlobalLibvips();
-
-  if (useGlobalLibvips) {
-    const globalLibvipsVersion = libvips.globalLibvipsVersion();
-    npmLog.info('sharp', `Detected globally-installed libvips v${globalLibvipsVersion}`);
-    npmLog.info('sharp', 'Building from source via node-gyp');
-    process.exit(1);
-  } else if (libvips.hasVendoredLibvips()) {
-    npmLog.info('sharp', `Using existing vendored libvips v${minimumLibvipsVersion}`);
-  } else {
-    // Is this arch/platform supported?
-    const arch = process.env.npm_config_arch || process.arch;
-    const platformAndArch = platform();
-    if (arch === 'ia32' && !platformAndArch.startsWith('win32')) {
-      throw new Error(`Intel Architecture 32-bit systems require manual installation of libvips >= ${minimumLibvipsVersion}`);
-    }
-    if (platformAndArch === 'freebsd-x64' || platformAndArch === 'openbsd-x64' || platformAndArch === 'sunos-x64') {
-      throw new Error(`BSD/SunOS systems require manual installation of libvips >= ${minimumLibvipsVersion}`);
-    }
-    if (detectLibc.family === detectLibc.GLIBC && detectLibc.version) {
-      if (semver.lt(`${detectLibc.version}.0`, `${minimumGlibcVersionByArch[arch]}.0`)) {
-        throw new Error(`Use with glibc ${detectLibc.version} requires manual installation of libvips >= ${minimumLibvipsVersion}`);
-      }
-    }
-
-    const supportedNodeVersion = process.env.npm_package_engines_node || require('../package.json').engines.node;
-    if (!semver.satisfies(process.versions.node, supportedNodeVersion)) {
-      throw new Error(`Expected Node.js version ${supportedNodeVersion} but found ${process.versions.node}`);
-    }
-
-    const extension = supportsBrotli ? 'br' : 'gz';
-
-    // Download to per-process temporary file
-    const tarFilename = ['libvips', minimumLibvipsVersion, platformAndArch].join('-') + '.tar.' + extension;
-    const tarPathCache = path.join(libvips.cachePath(), tarFilename);
-    if (fs.existsSync(tarPathCache)) {
-      npmLog.info('sharp', `Using cached ${tarPathCache}`);
-      extractTarball(tarPathCache);
-    } else {
-      const tarPathTemp = path.join(os.tmpdir(), `${process.pid}-${tarFilename}`);
-      const tmpFile = fs.createWriteStream(tarPathTemp);
-      const url = distBaseUrl + tarFilename;
-      npmLog.info('sharp', `Downloading ${url}`);
-      simpleGet({ url: url, agent: agent() }, function (err, response) {
-        if (err) {
-          fail(err);
-        } else if (response.statusCode === 404) {
-          fail(new Error(`Prebuilt libvips ${minimumLibvipsVersion} binaries are not yet available for ${platformAndArch}`));
-        } else if (response.statusCode !== 200) {
-          fail(new Error(`Status ${response.statusCode} ${response.statusMessage}`));
-        } else {
-          response
-            .on('error', fail)
-            .pipe(tmpFile);
-        }
-      });
-      tmpFile
-        .on('error', fail)
-        .on('close', function () {
-          try {
-            // Attempt to rename
-            fs.renameSync(tarPathTemp, tarPathCache);
-          } catch (err) {
-            // Fall back to copy and unlink
-            fs.copyFileSync(tarPathTemp, tarPathCache);
-            fs.unlinkSync(tarPathTemp);
-          }
-          extractTarball(tarPathCache);
-        });
-    }
-  }
-} catch (err) {
-  fail(err);
-}

install/prebuild-ci.js

@@ -1,12 +0,0 @@
-'use strict';
-
-const { spawnSync } = require('child_process');
-
-const { prebuild_upload: hasToken, APPVEYOR_REPO_TAG_NAME, TRAVIS_TAG } = process.env;
-
-if (hasToken && (APPVEYOR_REPO_TAG_NAME || TRAVIS_TAG)) {
-  spawnSync('node',
-    ['./node_modules/prebuild/bin.js', '--runtime', 'napi', '--target', '3'],
-    { shell: true, stdio: 'inherit' }
-  );
-}

lib/agent.js

@@ -1,40 +0,0 @@
-'use strict';
-
-const url = require('url');
-const tunnelAgent = require('tunnel-agent');
-
-const is = require('./is');
-
-const proxies = [
-  'HTTPS_PROXY',
-  'https_proxy',
-  'HTTP_PROXY',
-  'http_proxy',
-  'npm_config_https_proxy',
-  'npm_config_proxy'
-];
-
-function env (key) {
-  return process.env[key];
-}
-
-module.exports = function () {
-  try {
-    const proxy = new url.URL(proxies.map(env).find(is.string));
-    const tunnel = proxy.protocol === 'https:'
-      ? tunnelAgent.httpsOverHttps
-      : tunnelAgent.httpsOverHttp;
-    const proxyAuth = proxy.username && proxy.password
-      ? `${proxy.username}:${proxy.password}`
-      : null;
-    return tunnel({
-      proxy: {
-        port: Number(proxy.port),
-        host: proxy.hostname,
-        proxyAuth
-      }
-    });
-  } catch (err) {
-    return null;
-  }
-};

lib/channel.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const is = require('./is');
@@ -15,6 +18,8 @@ const bool = {
 /**
  * Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.
  *
+ * See also {@link /api-operation#flatten|flatten}.
+ *
  * @example
  * sharp('rgba.png')
  *   .removeAlpha()
@@ -30,21 +35,39 @@ function removeAlpha () {
 }
 
 /**
- * Ensure alpha channel, if missing. The added alpha channel will be fully opaque. This is a no-op if the image already has an alpha channel.
+ * Ensure the output image has an alpha transparency channel.
+ * If missing, the added alpha channel will have the specified
+ * transparency level, defaulting to fully-opaque (1).
+ * This is a no-op if the image already has an alpha channel.
  *
  * @since 0.21.2
  *
  * @example
- * sharp('rgb.jpg')
+ * // rgba.png will be a 4 channel image with a fully-opaque alpha channel
+ * await sharp('rgb.jpg')
  *   .ensureAlpha()
- *   .toFile('rgba.png', function(err, info) {
- *     // rgba.png is a 4 channel image with a fully opaque alpha channel
- *   });
+ *   .toFile('rgba.png')
  *
+ * @example
+ * // rgba is a 4 channel image with a fully-transparent alpha channel
+ * const rgba = await sharp(rgb)
+ *   .ensureAlpha(0)
+ *   .toBuffer();
+ *
+ * @param {number} [alpha=1] - alpha transparency level (0=fully-transparent, 1=fully-opaque)
  * @returns {Sharp}
+ * @throws {Error} Invalid alpha transparency level
  */
-function ensureAlpha () {
-  this.options.ensureAlpha = true;
+function ensureAlpha (alpha) {
+  if (is.defined(alpha)) {
+    if (is.number(alpha) && is.inRange(alpha, 0, 1)) {
+      this.options.ensureAlpha = alpha;
+    } else {
+      throw is.invalidParameterError('alpha', 'number between 0 and 1', alpha);
+    }
+  } else {
+    this.options.ensureAlpha = 1;
+  }
   return this;
 }
 
@@ -52,13 +75,17 @@ function ensureAlpha () {
  * Extract a single channel from a multi-channel image.
  *
  * @example
- * sharp(input)
+ * // green.jpg is a greyscale image containing the green channel of the input
+ * await sharp(input)
  *   .extractChannel('green')
- *   .toColourspace('b-w')
- *   .toFile('green.jpg', function(err, info) {
- *     // info.channels === 1
- *     // green.jpg is a greyscale image containing the green channel of the input
- *    });
+ *   .toFile('green.jpg');
+ *
+ * @example
+ * // red1 is the red value of the first pixel, red2 the second pixel etc.
+ * const [red1, red2, ...] = await sharp(input)
+ *   .extractChannel(0)
+ *   .raw()
+ *   .toBuffer();
  *
  * @param {number|string} channel - zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
  * @returns {Sharp}
@@ -85,7 +112,7 @@ function extractChannel (channel) {
  * - sRGB: 0: Red, 1: Green, 2: Blue, 3: Alpha.
  * - CMYK: 0: Magenta, 1: Cyan, 2: Yellow, 3: Black, 4: Alpha.
  *
- * Buffers may be any of the image formats supported by sharp: JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data.
+ * Buffers may be any of the image formats supported by sharp.
  * For raw pixel input, the `options` object should contain a `raw` attribute, which follows the format of the attribute of the same name in the `sharp()` constructor.
  *
  * @param {Array<string|Buffer>|string|Buffer} images - one or more images (file paths, Buffers).

lib/colour.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const color = require('color');
@@ -19,6 +22,11 @@ const colourspace = {
  * Tint the image using the provided chroma while preserving the image luminance.
  * An alpha channel may be present and will be unchanged by the operation.
  *
+ * @example
+ * const output = await sharp(input)
+ *   .tint({ r: 255, g: 240, b: 16 })
+ *   .toBuffer();
+ *
  * @param {string|Object} rgb - parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values.
  * @returns {Sharp}
  * @throws {Error} Invalid parameter
@@ -37,6 +45,10 @@ function tint (rgb) {
  * This may be overridden by other sharp operations such as `toColourspace('b-w')`,
  * which will produce an output image containing one color channel.
  * An alpha channel may be present, and will be unchanged by the operation.
+ *
+ * @example
+ * const output = await sharp(input).greyscale().toBuffer();
+ *
  * @param {Boolean} [greyscale=true]
  * @returns {Sharp}
  */
@@ -54,10 +66,57 @@ function grayscale (grayscale) {
   return this.greyscale(grayscale);
 }
 
+/**
+ * Set the pipeline colourspace.
+ *
+ * The input image will be converted to the provided colourspace at the start of the pipeline.
+ * All operations will use this colourspace before converting to the output colourspace,
+ * as defined by {@link #tocolourspace|toColourspace}.
+ *
+ * This feature is experimental and has not yet been fully-tested with all operations.
+ *
+ * @since 0.29.0
+ *
+ * @example
+ * // Run pipeline in 16 bits per channel RGB while converting final result to 8 bits per channel sRGB.
+ * await sharp(input)
+ *  .pipelineColourspace('rgb16')
+ *  .toColourspace('srgb')
+ *  .toFile('16bpc-pipeline-to-8bpc-output.png')
+ *
+ * @param {string} [colourspace] - pipeline colourspace e.g. `rgb16`, `scrgb`, `lab`, `grey16` [...](https://github.com/libvips/libvips/blob/41cff4e9d0838498487a00623462204eb10ee5b8/libvips/iofuncs/enumtypes.c#L774)
+ * @returns {Sharp}
+ * @throws {Error} Invalid parameters
+ */
+function pipelineColourspace (colourspace) {
+  if (!is.string(colourspace)) {
+    throw is.invalidParameterError('colourspace', 'string', colourspace);
+  }
+  this.options.colourspaceInput = colourspace;
+  return this;
+}
+
+/**
+ * Alternative spelling of `pipelineColourspace`.
+ * @param {string} [colorspace] - pipeline colorspace.
+ * @returns {Sharp}
+ * @throws {Error} Invalid parameters
+ */
+function pipelineColorspace (colorspace) {
+  return this.pipelineColourspace(colorspace);
+}
+
 /**
  * Set the output colourspace.
  * By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.
- * @param {string} [colourspace] - output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://github.com/libvips/libvips/blob/master/libvips/iofuncs/enumtypes.c#L568)
+ *
+ * @example
+ * // Output 16 bits per pixel RGB
+ * await sharp(input)
+ *  .toColourspace('rgb16')
+ *  .toFile('16-bpp.png')
+ *
+ * @param {string} [colourspace] - output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://github.com/libvips/libvips/blob/3c0bfdf74ce1dc37a6429bed47fa76f16e2cd70a/libvips/iofuncs/enumtypes.c#L777-L794)
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -112,6 +171,8 @@ module.exports = function (Sharp) {
     tint,
     greyscale,
     grayscale,
+    pipelineColourspace,
+    pipelineColorspace,
     toColourspace,
     toColorspace,
     // Private

lib/composite.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const is = require('./is');
@@ -43,6 +46,9 @@ const blend = {
  * The images to composite must be the same size or smaller than the processed image.
  * If both `top` and `left` options are provided, they take precedence over `gravity`.
  *
+ * Any resize, rotate or extract operations in the same processing pipeline
+ * will always be applied to the input image before composition.
+ *
  * The `blend` option can be one of `clear`, `source`, `over`, `in`, `out`, `atop`,
  * `dest`, `dest-over`, `dest-in`, `dest-out`, `dest-atop`,
  * `xor`, `add`, `saturate`, `multiply`, `screen`, `overlay`, `darken`, `lighten`,
@@ -50,12 +56,27 @@ const blend = {
  * `hard-light`, `soft-light`, `difference`, `exclusion`.
  *
  * More information about blend modes can be found at
- * https://libvips.github.io/libvips/API/current/libvips-conversion.html#VipsBlendMode
+ * https://www.libvips.org/API/current/libvips-conversion.html#VipsBlendMode
  * and https://www.cairographics.org/operators/
  *
  * @since 0.22.0
  *
  * @example
+ * await sharp(background)
+ *   .composite([
+ *     { input: layer1, gravity: 'northwest' },
+ *     { input: layer2, gravity: 'southeast' },
+ *   ])
+ *   .toFile('combined.png');
+ *
+ * @example
+ * const output = await sharp('input.gif', { animated: true })
+ *   .composite([
+ *     { input: 'overlay.png', tile: true, blend: 'saturate' }
+ *   ])
+ *   .toBuffer();
+ *
+ * @example
  * sharp('input.png')
  *   .rotate(180)
  *   .resize(300)
@@ -78,17 +99,31 @@ const blend = {
  * @param {Number} [images[].input.create.height]
  * @param {Number} [images[].input.create.channels] - 3-4
  * @param {String|Object} [images[].input.create.background] - parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
+ * @param {Object} [images[].input.text] - describes a new text image to be created.
+ * @param {string} [images[].input.text.text] - text to render as a UTF-8 string. It can contain Pango markup, for example `<i>Le</i>Monde`.
+ * @param {string} [images[].input.text.font] - font name to render with.
+ * @param {string} [images[].input.text.fontfile] - absolute filesystem path to a font file that can be used by `font`.
+ * @param {number} [images[].input.text.width=0] - integral number of pixels to word-wrap at. Lines of text wider than this will be broken at word boundaries.
+ * @param {number} [images[].input.text.height=0] - integral number of pixels high. When defined, `dpi` will be ignored and the text will automatically fit the pixel resolution defined by `width` and `height`. Will be ignored if `width` is not specified or set to 0.
+ * @param {string} [images[].input.text.align='left'] - text alignment (`'left'`, `'centre'`, `'center'`, `'right'`).
+ * @param {boolean} [images[].input.text.justify=false] - set this to true to apply justification to the text.
+ * @param {number} [images[].input.text.dpi=72] - the resolution (size) at which to render the text. Does not take effect if `height` is specified.
+ * @param {boolean} [images[].input.text.rgba=false] - set this to true to enable RGBA output. This is useful for colour emoji rendering, or support for Pango markup features like `<span foreground="red">Red!</span>`.
+ * @param {number} [images[].input.text.spacing=0] - text line height in points. Will use the font line height if none is specified.
  * @param {String} [images[].blend='over'] - how to blend this image with the image below.
  * @param {String} [images[].gravity='centre'] - gravity at which to place the overlay.
  * @param {Number} [images[].top] - the pixel offset from the top edge.
  * @param {Number} [images[].left] - the pixel offset from the left edge.
  * @param {Boolean} [images[].tile=false] - set to true to repeat the overlay image across the entire image with the given `gravity`.
- * @param {Boolean} [images[].premultiplied=false] - set to true to avoid premultipling the image below. Equivalent to the `--premultiplied` vips option.
+ * @param {Boolean} [images[].premultiplied=false] - set to true to avoid premultiplying the image below. Equivalent to the `--premultiplied` vips option.
  * @param {Number} [images[].density=72] - number representing the DPI for vector overlay image.
  * @param {Object} [images[].raw] - describes overlay when using raw pixel data.
  * @param {Number} [images[].raw.width]
  * @param {Number} [images[].raw.height]
  * @param {Number} [images[].raw.channels]
+ * @param {boolean} [images[].animated=false] - Set to `true` to read all frames/pages of an animated image.
+ * @param {string} [images[].failOn='warning'] - @see {@link /api-constructor#parameters|constructor parameters}
+ * @param {number|boolean} [images[].limitInputPixels=268402689] - @see {@link /api-constructor#parameters|constructor parameters}
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -105,8 +140,9 @@ function composite (images) {
       input: this._createInputDescriptor(image.input, inputOptions, { allowStream: false }),
       blend: 'over',
       tile: false,
-      left: -1,
-      top: -1,
+      left: 0,
+      top: 0,
+      hasOffset: false,
       gravity: 0,
       premultiplied: false
     };
@@ -125,21 +161,23 @@ function composite (images) {
       }
     }
     if (is.defined(image.left)) {
-      if (is.integer(image.left) && image.left >= 0) {
+      if (is.integer(image.left)) {
         composite.left = image.left;
       } else {
-        throw is.invalidParameterError('left', 'positive integer', image.left);
+        throw is.invalidParameterError('left', 'integer', image.left);
       }
     }
     if (is.defined(image.top)) {
-      if (is.integer(image.top) && image.top >= 0) {
+      if (is.integer(image.top)) {
         composite.top = image.top;
       } else {
-        throw is.invalidParameterError('top', 'positive integer', image.top);
+        throw is.invalidParameterError('top', 'integer', image.top);
       }
     }
-    if (composite.left !== composite.top && Math.min(composite.left, composite.top) === -1) {
+    if (is.defined(image.top) !== is.defined(image.left)) {
       throw new Error('Expected both left and top to be set');
+    } else {
+      composite.hasOffset = is.integer(image.top) && is.integer(image.left);
     }
     if (is.defined(image.gravity)) {
       if (is.integer(image.gravity) && is.inRange(image.gravity, 0, 8)) {
@@ -157,7 +195,6 @@ function composite (images) {
         throw is.invalidParameterError('premultiplied', 'boolean', image.premultiplied);
       }
     }
-
     return composite;
   });
   return this;

lib/constructor.js

@@ -1,38 +1,13 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
-const util = require('util');
-const stream = require('stream');
+const util = require('node:util');
+const stream = require('node:stream');
 const is = require('./is');
 
-require('./libvips').hasVendoredLibvips();
-
-/* istanbul ignore next */
-try {
-  require('../build/Release/sharp.node');
-} catch (err) {
-  // Bail early if bindings aren't available
-  const help = ['', 'Something went wrong installing the "sharp" module', '', err.message, ''];
-  if (/NODE_MODULE_VERSION/.test(err.message)) {
-    help.push('- Ensure the version of Node.js used at install time matches that used at runtime');
-  } else if (/invalid ELF header/.test(err.message)) {
-    help.push(`- Ensure "${process.platform}" is used at install time as well as runtime`);
-  } else if (/dylib/.test(err.message) && /Incompatible library version/.test(err.message)) {
-    help.push('- Run "brew update && brew upgrade vips"');
-  } else if (/Cannot find module/.test(err.message)) {
-    help.push('- Run "npm rebuild --verbose sharp" and look for errors');
-  } else {
-    help.push(
-      '- Remove the "node_modules/sharp" directory then run',
-      '  "npm install --ignore-scripts=false --verbose" and look for errors'
-    );
-  }
-  help.push(
-    '- Consult the installation documentation at https://sharp.pixelplumbing.com/install',
-    '- Search for this error at https://github.com/lovell/sharp/issues', ''
-  );
-  const error = help.join('\n');
-  throw new Error(error);
-}
+require('./sharp');
 
 // Use NODE_DEBUG=sharp to enable libvips warnings
 const debuglog = util.debuglog('sharp');
@@ -40,7 +15,7 @@ const debuglog = util.debuglog('sharp');
 /**
  * Constructor factory to create an instance of `sharp`, to which further methods are chained.
  *
- * JPEG, PNG, WebP or TIFF format image data can be streamed out from this object.
+ * JPEG, PNG, WebP, GIF, AVIF or TIFF format image data can be streamed out from this object.
  * When using Stream based output, derived attributes are available from the `info` event.
  *
  * Non-critical problems encountered during processing are emitted as `warning` events.
@@ -73,7 +48,7 @@ const debuglog = util.debuglog('sharp');
  * readableStream.pipe(transformer).pipe(writableStream);
  *
  * @example
- * // Create a blank 300x200 PNG image of semi-transluent red pixels
+ * // Create a blank 300x200 PNG image of semi-translucent red pixels
  * sharp({
  *   create: {
  *     width: 300,
@@ -90,32 +65,102 @@ const debuglog = util.debuglog('sharp');
  * // Convert an animated GIF to an animated WebP
  * await sharp('in.gif', { animated: true }).toFile('out.webp');
  *
- * @param {(Buffer|string)} [input] - if present, can be
- *  a Buffer containing JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data, or
- *  a String containing the filesystem path to an JPEG, PNG, WebP, GIF, SVG or TIFF image file.
- *  JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when not present.
+ * @example
+ * // Read a raw array of pixels and save it to a png
+ * const input = Uint8Array.from([255, 255, 255, 0, 0, 0]); // or Uint8ClampedArray
+ * const image = sharp(input, {
+ *   // because the input does not contain its dimensions or how many channels it has
+ *   // we need to specify it in the constructor options
+ *   raw: {
+ *     width: 2,
+ *     height: 1,
+ *     channels: 3
+ *   }
+ * });
+ * await image.toFile('my-two-pixels.png');
+ *
+ * @example
+ * // Generate RGB Gaussian noise
+ * await sharp({
+ *   create: {
+ *     width: 300,
+ *     height: 200,
+ *     channels: 3,
+ *     noise: {
+ *       type: 'gaussian',
+ *       mean: 128,
+ *       sigma: 30
+ *     }
+ *  }
+ * }).toFile('noise.png');
+ *
+ * @example
+ * // Generate an image from text
+ * await sharp({
+ *   text: {
+ *     text: 'Hello, world!',
+ *     width: 400, // max width
+ *     height: 300 // max height
+ *   }
+ * }).toFile('text_bw.png');
+ *
+ * @example
+ * // Generate an rgba image from text using pango markup and font
+ * await sharp({
+ *   text: {
+ *     text: '<span foreground="red">Red!</span><span background="cyan">blue</span>',
+ *     font: 'sans',
+ *     rgba: true,
+ *     dpi: 300
+ *   }
+ * }).toFile('text_rgba.png');
+ *
+ * @param {(Buffer|ArrayBuffer|Uint8Array|Uint8ClampedArray|Int8Array|Uint16Array|Int16Array|Uint32Array|Int32Array|Float32Array|Float64Array|string)} [input] - if present, can be
+ *  a Buffer / ArrayBuffer / Uint8Array / Uint8ClampedArray containing JPEG, PNG, WebP, AVIF, GIF, SVG or TIFF image data, or
+ *  a TypedArray containing raw pixel image data, or
+ *  a String containing the filesystem path to an JPEG, PNG, WebP, AVIF, GIF, SVG or TIFF image file.
+ *  JPEG, PNG, WebP, AVIF, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when not present.
  * @param {Object} [options] - if present, is an Object with optional attributes.
- * @param {boolean} [options.failOnError=true] - by default halt processing and raise an error when loading invalid images.
- *  Set this flag to `false` if you'd rather apply a "best effort" to decode images, even if the data is corrupt or invalid.
+ * @param {string} [options.failOn='warning'] - when to abort processing of invalid pixel data, one of (in order of sensitivity): 'none' (least), 'truncated', 'error' or 'warning' (most), higher levels imply lower levels, invalid metadata will always abort.
  * @param {number|boolean} [options.limitInputPixels=268402689] - Do not process input images where the number of pixels
  *  (width x height) exceeds this limit. Assumes image dimensions contained in the input metadata can be trusted.
  *  An integral Number of pixels, zero or false to remove limit, true to use default limit of 268402689 (0x3FFF x 0x3FFF).
- * @param {boolean} [options.sequentialRead=false] - Set this to `true` to use sequential rather than random access where possible.
- *  This can reduce memory usage and might improve performance on some systems.
+ * @param {boolean} [options.unlimited=false] - Set this to `true` to remove safety features that help prevent memory exhaustion (JPEG, PNG, SVG, HEIF).
+ * @param {boolean} [options.sequentialRead=true] - Set this to `false` to use random access rather than sequential read. Some operations will do this automatically.
  * @param {number} [options.density=72] - number representing the DPI for vector images in the range 1 to 100000.
- * @param {number} [options.pages=1] - number of pages to extract for multi-page input (GIF, TIFF, PDF), use -1 for all pages.
- * @param {number} [options.page=0] - page number to start extracting from for multi-page input (GIF, TIFF, PDF), zero based.
+ * @param {number} [options.ignoreIcc=false] - should the embedded ICC profile, if any, be ignored.
+ * @param {number} [options.pages=1] - Number of pages to extract for multi-page input (GIF, WebP, TIFF), use -1 for all pages.
+ * @param {number} [options.page=0] - Page number to start extracting from for multi-page input (GIF, WebP, TIFF), zero based.
+ * @param {number} [options.subifd=-1] - subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image.
  * @param {number} [options.level=0] - level to extract from a multi-level input (OpenSlide), zero based.
- * @param {boolean} [options.animated=false] - Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`).
+ * @param {boolean} [options.animated=false] - Set to `true` to read all frames/pages of an animated image (GIF, WebP, TIFF), equivalent of setting `pages` to `-1`.
  * @param {Object} [options.raw] - describes raw pixel input image data. See `raw()` for pixel ordering.
- * @param {number} [options.raw.width]
- * @param {number} [options.raw.height]
- * @param {number} [options.raw.channels] - 1-4
+ * @param {number} [options.raw.width] - integral number of pixels wide.
+ * @param {number} [options.raw.height] - integral number of pixels high.
+ * @param {number} [options.raw.channels] - integral number of channels, between 1 and 4.
+ * @param {boolean} [options.raw.premultiplied] - specifies that the raw input has already been premultiplied, set to `true`
+ *  to avoid sharp premultiplying the image. (optional, default `false`)
  * @param {Object} [options.create] - describes a new image to be created.
- * @param {number} [options.create.width]
- * @param {number} [options.create.height]
- * @param {number} [options.create.channels] - 3-4
+ * @param {number} [options.create.width] - integral number of pixels wide.
+ * @param {number} [options.create.height] - integral number of pixels high.
+ * @param {number} [options.create.channels] - integral number of channels, either 3 (RGB) or 4 (RGBA).
  * @param {string|Object} [options.create.background] - parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
+ * @param {Object} [options.create.noise] - describes a noise to be created.
+ * @param {string} [options.create.noise.type] - type of generated noise, currently only `gaussian` is supported.
+ * @param {number} [options.create.noise.mean] - mean of pixels in generated noise.
+ * @param {number} [options.create.noise.sigma] - standard deviation of pixels in generated noise.
+ * @param {Object} [options.text] - describes a new text image to be created.
+ * @param {string} [options.text.text] - text to render as a UTF-8 string. It can contain Pango markup, for example `<i>Le</i>Monde`.
+ * @param {string} [options.text.font] - font name to render with.
+ * @param {string} [options.text.fontfile] - absolute filesystem path to a font file that can be used by `font`.
+ * @param {number} [options.text.width=0] - Integral number of pixels to word-wrap at. Lines of text wider than this will be broken at word boundaries.
+ * @param {number} [options.text.height=0] - Maximum integral number of pixels high. When defined, `dpi` will be ignored and the text will automatically fit the pixel resolution defined by `width` and `height`. Will be ignored if `width` is not specified or set to 0.
+ * @param {string} [options.text.align='left'] - Alignment style for multi-line text (`'left'`, `'centre'`, `'center'`, `'right'`).
+ * @param {boolean} [options.text.justify=false] - set this to true to apply justification to the text.
+ * @param {number} [options.text.dpi=72] - the resolution (size) at which to render the text. Does not take effect if `height` is specified.
+ * @param {boolean} [options.text.rgba=false] - set this to true to enable RGBA output. This is useful for colour emoji rendering, or support for pango markup features like `<span foreground="red">Red!</span>`.
+ * @param {number} [options.text.spacing=0] - text line height in points. Will use the font line height if none is specified.
+ * @param {string} [options.text.wrap='word'] - word wrapping style when width is provided, one of: 'word', 'char', 'charWord' (prefer char, fallback to word) or 'none'.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -154,7 +199,9 @@ const Sharp = function (input, options) {
     extendLeft: 0,
     extendRight: 0,
     extendBackground: [0, 0, 0, 255],
+    extendWith: 'background',
     withoutEnlargement: false,
+    withoutReduction: false,
     affineMatrix: [],
     affineBackground: [0, 0, 0, 255],
     affineIdx: 0,
@@ -169,29 +216,42 @@ const Sharp = function (input, options) {
     tintB: 128,
     flatten: false,
     flattenBackground: [0, 0, 0],
+    unflatten: false,
     negate: false,
+    negateAlpha: true,
     medianSize: 0,
     blurSigma: 0,
     sharpenSigma: 0,
-    sharpenFlat: 1,
-    sharpenJagged: 2,
+    sharpenM1: 1,
+    sharpenM2: 2,
+    sharpenX1: 2,
+    sharpenY2: 10,
+    sharpenY3: 20,
     threshold: 0,
     thresholdGrayscale: true,
+    trimBackground: [],
     trimThreshold: 0,
     gamma: 0,
     gammaOut: 0,
     greyscale: false,
     normalise: false,
+    normaliseLower: 1,
+    normaliseUpper: 99,
+    claheWidth: 0,
+    claheHeight: 0,
+    claheMaxSlope: 3,
     brightness: 1,
     saturation: 1,
     hue: 0,
+    lightness: 0,
     booleanBufferIn: null,
     booleanFileIn: '',
     joinChannelIn: [],
     extractChannel: -1,
     removeAlpha: false,
-    ensureAlpha: false,
+    ensureAlpha: -1,
     colourspace: 'srgb',
+    colourspaceInput: 'last',
     composite: [],
     // output
     fileOut: '',
@@ -199,7 +259,9 @@ const Sharp = function (input, options) {
     streamOut: false,
     withMetadata: false,
     withMetadataOrientation: -1,
+    withMetadataDensity: 0,
     withMetadataIcc: '',
+    withMetadataStrs: {},
     resolveWithObject: false,
     // output format
     jpegQuality: 80,
@@ -211,18 +273,34 @@ const Sharp = function (input, options) {
     jpegOptimiseCoding: true,
     jpegQuantisationTable: 0,
     pngProgressive: false,
-    pngCompressionLevel: 9,
+    pngCompressionLevel: 6,
     pngAdaptiveFiltering: false,
     pngPalette: false,
     pngQuality: 100,
-    pngColours: 256,
+    pngEffort: 7,
+    pngBitdepth: 8,
     pngDither: 1,
+    jp2Quality: 80,
+    jp2TileHeight: 512,
+    jp2TileWidth: 512,
+    jp2Lossless: false,
+    jp2ChromaSubsampling: '4:4:4',
     webpQuality: 80,
     webpAlphaQuality: 100,
     webpLossless: false,
     webpNearLossless: false,
     webpSmartSubsample: false,
-    webpReductionEffort: 4,
+    webpPreset: 'default',
+    webpEffort: 4,
+    webpMinSize: false,
+    webpMixed: false,
+    gifBitdepth: 8,
+    gifEffort: 7,
+    gifDither: 1,
+    gifInterFrameMaxError: 0,
+    gifInterPaletteMaxError: 3,
+    gifReuse: true,
+    gifProgressive: false,
     tiffQuality: 80,
     tiffCompression: 'jpeg',
     tiffPredictor: 'horizontal',
@@ -233,9 +311,17 @@ const Sharp = function (input, options) {
     tiffTileWidth: 256,
     tiffXres: 1.0,
     tiffYres: 1.0,
-    heifQuality: 80,
+    tiffResolutionUnit: 'inch',
+    heifQuality: 50,
     heifLossless: false,
-    heifCompression: 'hevc',
+    heifCompression: 'av1',
+    heifEffort: 4,
+    heifChromaSubsampling: '4:4:4',
+    jxlDistance: 1,
+    jxlDecodingTier: 0,
+    jxlEffort: 7,
+    jxlLossless: false,
+    rawDepth: 'uchar',
     tileSize: 256,
     tileOverlap: 0,
     tileContainer: 'fs',
@@ -246,8 +332,11 @@ const Sharp = function (input, options) {
     tileSkipBlanks: -1,
     tileBackground: [255, 255, 255, 255],
     tileCentre: false,
-    linearA: 1,
-    linearB: 0,
+    tileId: 'https://example.com/iiif',
+    tileBasename: '',
+    timeoutSeconds: 0,
+    linearA: [],
+    linearB: [],
     // Function to notify of libvips warnings
     debuglog: warning => {
       this.emit('warning', warning);
@@ -261,7 +350,8 @@ const Sharp = function (input, options) {
   this.options.input = this._createInputDescriptor(input, options, { allowStream: true });
   return this;
 };
-util.inherits(Sharp, stream.Duplex);
+Object.setPrototypeOf(Sharp.prototype, stream.Duplex.prototype);
+Object.setPrototypeOf(Sharp, stream.Duplex);
 
 /**
  * Take a "snapshot" of the Sharp instance, returning a new instance.
@@ -281,9 +371,7 @@ util.inherits(Sharp, stream.Duplex);
  * // Using Promises to know when the pipeline is complete
  * const fs = require("fs");
  * const got = require("got");
- * const sharpStream = sharp({
- *   failOnError: false
- * });
+ * const sharpStream = sharp({ failOn: 'none' });
  *
  * const promises = [];
  *
@@ -310,7 +398,7 @@ util.inherits(Sharp, stream.Duplex);
  *     .toFile("optimized-500.webp")
  * );
  *
- * // https://github.com/sindresorhus/got#gotstreamurl-options
+ * // https://github.com/sindresorhus/got/blob/main/documentation/3-streams.md
  * got.stream("https://www.example.com/some-file.jpg").pipe(sharpStream);
  *
  * Promise.all(promises)

lib/index.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const Sharp = require('./constructor');

lib/input.js

@@ -1,17 +1,32 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const color = require('color');
 const is = require('./is');
-const sharp = require('../build/Release/sharp.node');
+const sharp = require('./sharp');
+
+/**
+ * Justication alignment
+ * @member
+ * @private
+ */
+const align = {
+  left: 'low',
+  center: 'centre',
+  centre: 'centre',
+  right: 'high'
+};
 
 /**
  * Extract input options, if any, from an object.
  * @private
  */
 function _inputOptionsFromObject (obj) {
-  const { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages } = obj;
-  return [raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages].some(is.defined)
-    ? { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages }
+  const { raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd } = obj;
+  return [raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd].some(is.defined)
+    ? { raw, density, limitInputPixels, ignoreIcc, unlimited, sequentialRead, failOn, failOnError, animated, page, pages, subifd }
     : undefined;
 }
 
@@ -21,16 +36,31 @@ function _inputOptionsFromObject (obj) {
  */
 function _createInputDescriptor (input, inputOptions, containerOptions) {
   const inputDescriptor = {
-    failOnError: true,
+    failOn: 'warning',
     limitInputPixels: Math.pow(0x3FFF, 2),
-    sequentialRead: false
+    ignoreIcc: false,
+    unlimited: false,
+    sequentialRead: true
   };
   if (is.string(input)) {
     // filesystem
     inputDescriptor.file = input;
   } else if (is.buffer(input)) {
     // Buffer
+    if (input.length === 0) {
+      throw Error('Input Buffer is empty');
+    }
     inputDescriptor.buffer = input;
+  } else if (is.arrayBuffer(input)) {
+    if (input.byteLength === 0) {
+      throw Error('Input bit Array is empty');
+    }
+    inputDescriptor.buffer = Buffer.from(input, 0, input.byteLength);
+  } else if (is.typedArray(input)) {
+    if (input.length === 0) {
+      throw Error('Input Bit Array is empty');
+    }
+    inputDescriptor.buffer = Buffer.from(input.buffer, input.byteOffset, input.byteLength);
   } else if (is.plainObject(input) && !is.defined(inputOptions)) {
     // Plain Object descriptor, e.g. create
     inputOptions = input;
@@ -47,14 +77,22 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
     }`);
   }
   if (is.object(inputOptions)) {
-    // Fail on error
+    // Deprecated: failOnError
     if (is.defined(inputOptions.failOnError)) {
       if (is.bool(inputOptions.failOnError)) {
-        inputDescriptor.failOnError = inputOptions.failOnError;
+        inputDescriptor.failOn = inputOptions.failOnError ? 'warning' : 'none';
       } else {
         throw is.invalidParameterError('failOnError', 'boolean', inputOptions.failOnError);
       }
     }
+    // failOn
+    if (is.defined(inputOptions.failOn)) {
+      if (is.string(inputOptions.failOn) && is.inArray(inputOptions.failOn, ['none', 'truncated', 'error', 'warning'])) {
+        inputDescriptor.failOn = inputOptions.failOn;
+      } else {
+        throw is.invalidParameterError('failOn', 'one of: none, truncated, error, warning', inputOptions.failOn);
+      }
+    }
     // Density
     if (is.defined(inputOptions.density)) {
       if (is.inRange(inputOptions.density, 1, 100000)) {
@@ -63,16 +101,32 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         throw is.invalidParameterError('density', 'number between 1 and 100000', inputOptions.density);
       }
     }
+    // Ignore embeddded ICC profile
+    if (is.defined(inputOptions.ignoreIcc)) {
+      if (is.bool(inputOptions.ignoreIcc)) {
+        inputDescriptor.ignoreIcc = inputOptions.ignoreIcc;
+      } else {
+        throw is.invalidParameterError('ignoreIcc', 'boolean', inputOptions.ignoreIcc);
+      }
+    }
     // limitInputPixels
     if (is.defined(inputOptions.limitInputPixels)) {
       if (is.bool(inputOptions.limitInputPixels)) {
         inputDescriptor.limitInputPixels = inputOptions.limitInputPixels
           ? Math.pow(0x3FFF, 2)
           : 0;
-      } else if (is.integer(inputOptions.limitInputPixels) && inputOptions.limitInputPixels >= 0) {
+      } else if (is.integer(inputOptions.limitInputPixels) && is.inRange(inputOptions.limitInputPixels, 0, Number.MAX_SAFE_INTEGER)) {
         inputDescriptor.limitInputPixels = inputOptions.limitInputPixels;
       } else {
-        throw is.invalidParameterError('limitInputPixels', 'integer >= 0', inputOptions.limitInputPixels);
+        throw is.invalidParameterError('limitInputPixels', 'positive integer', inputOptions.limitInputPixels);
+      }
+    }
+    // unlimited
+    if (is.defined(inputOptions.unlimited)) {
+      if (is.bool(inputOptions.unlimited)) {
+        inputDescriptor.unlimited = inputOptions.unlimited;
+      } else {
+        throw is.invalidParameterError('unlimited', 'boolean', inputOptions.unlimited);
       }
     }
     // sequentialRead
@@ -94,6 +148,38 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         inputDescriptor.rawWidth = inputOptions.raw.width;
         inputDescriptor.rawHeight = inputOptions.raw.height;
         inputDescriptor.rawChannels = inputOptions.raw.channels;
+        inputDescriptor.rawPremultiplied = !!inputOptions.raw.premultiplied;
+
+        switch (input.constructor) {
+          case Uint8Array:
+          case Uint8ClampedArray:
+            inputDescriptor.rawDepth = 'uchar';
+            break;
+          case Int8Array:
+            inputDescriptor.rawDepth = 'char';
+            break;
+          case Uint16Array:
+            inputDescriptor.rawDepth = 'ushort';
+            break;
+          case Int16Array:
+            inputDescriptor.rawDepth = 'short';
+            break;
+          case Uint32Array:
+            inputDescriptor.rawDepth = 'uint';
+            break;
+          case Int32Array:
+            inputDescriptor.rawDepth = 'int';
+            break;
+          case Float32Array:
+            inputDescriptor.rawDepth = 'float';
+            break;
+          case Float64Array:
+            inputDescriptor.rawDepth = 'double';
+            break;
+          default:
+            inputDescriptor.rawDepth = 'uchar';
+            break;
+        }
       } else {
         throw new Error('Expected width, height and channels for raw pixel input');
       }
@@ -128,28 +214,146 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         throw is.invalidParameterError('level', 'integer between 0 and 256', inputOptions.level);
       }
     }
+    // Sub Image File Directory (TIFF)
+    if (is.defined(inputOptions.subifd)) {
+      if (is.integer(inputOptions.subifd) && is.inRange(inputOptions.subifd, -1, 100000)) {
+        inputDescriptor.subifd = inputOptions.subifd;
+      } else {
+        throw is.invalidParameterError('subifd', 'integer between -1 and 100000', inputOptions.subifd);
+      }
+    }
     // Create new image
     if (is.defined(inputOptions.create)) {
       if (
         is.object(inputOptions.create) &&
         is.integer(inputOptions.create.width) && inputOptions.create.width > 0 &&
         is.integer(inputOptions.create.height) && inputOptions.create.height > 0 &&
-        is.integer(inputOptions.create.channels) && is.inRange(inputOptions.create.channels, 3, 4) &&
-        is.defined(inputOptions.create.background)
+        is.integer(inputOptions.create.channels)
       ) {
         inputDescriptor.createWidth = inputOptions.create.width;
         inputDescriptor.createHeight = inputOptions.create.height;
         inputDescriptor.createChannels = inputOptions.create.channels;
-        const background = color(inputOptions.create.background);
-        inputDescriptor.createBackground = [
-          background.red(),
-          background.green(),
-          background.blue(),
-          Math.round(background.alpha() * 255)
-        ];
+        // Noise
+        if (is.defined(inputOptions.create.noise)) {
+          if (!is.object(inputOptions.create.noise)) {
+            throw new Error('Expected noise to be an object');
+          }
+          if (!is.inArray(inputOptions.create.noise.type, ['gaussian'])) {
+            throw new Error('Only gaussian noise is supported at the moment');
+          }
+          if (!is.inRange(inputOptions.create.channels, 1, 4)) {
+            throw is.invalidParameterError('create.channels', 'number between 1 and 4', inputOptions.create.channels);
+          }
+          inputDescriptor.createNoiseType = inputOptions.create.noise.type;
+          if (is.number(inputOptions.create.noise.mean) && is.inRange(inputOptions.create.noise.mean, 0, 10000)) {
+            inputDescriptor.createNoiseMean = inputOptions.create.noise.mean;
+          } else {
+            throw is.invalidParameterError('create.noise.mean', 'number between 0 and 10000', inputOptions.create.noise.mean);
+          }
+          if (is.number(inputOptions.create.noise.sigma) && is.inRange(inputOptions.create.noise.sigma, 0, 10000)) {
+            inputDescriptor.createNoiseSigma = inputOptions.create.noise.sigma;
+          } else {
+            throw is.invalidParameterError('create.noise.sigma', 'number between 0 and 10000', inputOptions.create.noise.sigma);
+          }
+        } else if (is.defined(inputOptions.create.background)) {
+          if (!is.inRange(inputOptions.create.channels, 3, 4)) {
+            throw is.invalidParameterError('create.channels', 'number between 3 and 4', inputOptions.create.channels);
+          }
+          const background = color(inputOptions.create.background);
+          inputDescriptor.createBackground = [
+            background.red(),
+            background.green(),
+            background.blue(),
+            Math.round(background.alpha() * 255)
+          ];
+        } else {
+          throw new Error('Expected valid noise or background to create a new input image');
+        }
         delete inputDescriptor.buffer;
       } else {
-        throw new Error('Expected width, height, channels and background to create a new input image');
+        throw new Error('Expected valid width, height and channels to create a new input image');
+      }
+    }
+    // Create a new image with text
+    if (is.defined(inputOptions.text)) {
+      if (is.object(inputOptions.text) && is.string(inputOptions.text.text)) {
+        inputDescriptor.textValue = inputOptions.text.text;
+        if (is.defined(inputOptions.text.height) && is.defined(inputOptions.text.dpi)) {
+          throw new Error('Expected only one of dpi or height');
+        }
+        if (is.defined(inputOptions.text.font)) {
+          if (is.string(inputOptions.text.font)) {
+            inputDescriptor.textFont = inputOptions.text.font;
+          } else {
+            throw is.invalidParameterError('text.font', 'string', inputOptions.text.font);
+          }
+        }
+        if (is.defined(inputOptions.text.fontfile)) {
+          if (is.string(inputOptions.text.fontfile)) {
+            inputDescriptor.textFontfile = inputOptions.text.fontfile;
+          } else {
+            throw is.invalidParameterError('text.fontfile', 'string', inputOptions.text.fontfile);
+          }
+        }
+        if (is.defined(inputOptions.text.width)) {
+          if (is.number(inputOptions.text.width)) {
+            inputDescriptor.textWidth = inputOptions.text.width;
+          } else {
+            throw is.invalidParameterError('text.textWidth', 'number', inputOptions.text.width);
+          }
+        }
+        if (is.defined(inputOptions.text.height)) {
+          if (is.number(inputOptions.text.height)) {
+            inputDescriptor.textHeight = inputOptions.text.height;
+          } else {
+            throw is.invalidParameterError('text.height', 'number', inputOptions.text.height);
+          }
+        }
+        if (is.defined(inputOptions.text.align)) {
+          if (is.string(inputOptions.text.align) && is.string(this.constructor.align[inputOptions.text.align])) {
+            inputDescriptor.textAlign = this.constructor.align[inputOptions.text.align];
+          } else {
+            throw is.invalidParameterError('text.align', 'valid alignment', inputOptions.text.align);
+          }
+        }
+        if (is.defined(inputOptions.text.justify)) {
+          if (is.bool(inputOptions.text.justify)) {
+            inputDescriptor.textJustify = inputOptions.text.justify;
+          } else {
+            throw is.invalidParameterError('text.justify', 'boolean', inputOptions.text.justify);
+          }
+        }
+        if (is.defined(inputOptions.text.dpi)) {
+          if (is.number(inputOptions.text.dpi) && is.inRange(inputOptions.text.dpi, 1, 100000)) {
+            inputDescriptor.textDpi = inputOptions.text.dpi;
+          } else {
+            throw is.invalidParameterError('text.dpi', 'number between 1 and 100000', inputOptions.text.dpi);
+          }
+        }
+        if (is.defined(inputOptions.text.rgba)) {
+          if (is.bool(inputOptions.text.rgba)) {
+            inputDescriptor.textRgba = inputOptions.text.rgba;
+          } else {
+            throw is.invalidParameterError('text.rgba', 'bool', inputOptions.text.rgba);
+          }
+        }
+        if (is.defined(inputOptions.text.spacing)) {
+          if (is.number(inputOptions.text.spacing)) {
+            inputDescriptor.textSpacing = inputOptions.text.spacing;
+          } else {
+            throw is.invalidParameterError('text.spacing', 'number', inputOptions.text.spacing);
+          }
+        }
+        if (is.defined(inputOptions.text.wrap)) {
+          if (is.string(inputOptions.text.wrap) && is.inArray(inputOptions.text.wrap, ['word', 'char', 'wordChar', 'none'])) {
+            inputDescriptor.textWrap = inputOptions.text.wrap;
+          } else {
+            throw is.invalidParameterError('text.wrap', 'one of: word, char, wordChar, none', inputOptions.text.wrap);
+          }
+        }
+        delete inputDescriptor.buffer;
+      } else {
+        throw new Error('Expected a valid string to create an image with text.');
       }
     }
   } else if (is.defined(inputOptions)) {
@@ -205,25 +409,38 @@ function _isStreamInput () {
 }
 
 /**
- * Fast access to (uncached) image metadata without decoding any compressed image data.
+ * Fast access to (uncached) image metadata without decoding any compressed pixel data.
+ *
+ * This is read from the header of the input image.
+ * It does not take into consideration any operations to be applied to the output image,
+ * such as resize or rotate.
+ *
+ * Dimensions in the response will respect the `page` and `pages` properties of the
+ * {@link /api-constructor#parameters|constructor parameters}.
+ *
  * A `Promise` is returned when `callback` is not provided.
  *
  * - `format`: Name of decoder used to decompress image data e.g. `jpeg`, `png`, `webp`, `gif`, `svg`
  * - `size`: Total size of image in bytes, for Stream and Buffer input only
- * - `width`: Number of pixels wide (EXIF orientation is not taken into consideration)
- * - `height`: Number of pixels high (EXIF orientation is not taken into consideration)
- * - `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://libvips.github.io/libvips/API/current/VipsImage.html#VipsInterpretation)
+ * - `width`: Number of pixels wide (EXIF orientation is not taken into consideration, see example below)
+ * - `height`: Number of pixels high (EXIF orientation is not taken into consideration, see example below)
+ * - `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://www.libvips.org/API/current/VipsImage.html#VipsInterpretation)
  * - `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
- * - `depth`: Name of pixel depth format e.g. `uchar`, `char`, `ushort`, `float` [...](https://libvips.github.io/libvips/API/current/VipsImage.html#VipsBandFormat)
+ * - `depth`: Name of pixel depth format e.g. `uchar`, `char`, `ushort`, `float` [...](https://www.libvips.org/API/current/VipsImage.html#VipsBandFormat)
  * - `density`: Number of pixels per inch (DPI), if present
  * - `chromaSubsampling`: String containing JPEG chroma subsampling, `4:2:0` or `4:4:4` for RGB, `4:2:0:4` or `4:4:4:4` for CMYK
  * - `isProgressive`: Boolean indicating whether the image is interlaced using a progressive scan
  * - `pages`: Number of pages/frames contained within the image, with support for TIFF, HEIF, PDF, animated GIF and animated WebP
  * - `pageHeight`: Number of pixels high each page in a multi-page image will be.
+ * - `paletteBitDepth`: Bit depth of palette-based image (GIF, PNG).
  * - `loop`: Number of times to loop an animated image, zero refers to a continuous loop.
  * - `delay`: Delay in ms between each page in an animated image, provided as an array of integers.
  * - `pagePrimary`: Number of the primary page in a HEIF image
  * - `levels`: Details of each level in a multi-level image provided as an array of objects, requires libvips compiled with support for OpenSlide
+ * - `subifds`: Number of Sub Image File Directories in an OME-TIFF image
+ * - `background`: Default background colour, if present, for PNG (bKGD) and GIF images, either an RGB Object or a single greyscale value
+ * - `compression`: The encoder used to compress an HEIF file, `av1` (AVIF) or `hevc` (HEIC)
+ * - `resolutionUnit`: The unit of resolution (density), either `inch` or `cm`, if present
  * - `hasProfile`: Boolean indicating the presence of an embedded ICC profile
  * - `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
  * - `orientation`: Number value of the EXIF Orientation header, if present
@@ -232,6 +449,10 @@ function _isStreamInput () {
  * - `iptc`: Buffer containing raw IPTC data, if present
  * - `xmp`: Buffer containing raw XMP data, if present
  * - `tifftagPhotoshop`: Buffer containing raw TIFFTAG_PHOTOSHOP data, if present
+ * - `formatMagick`: String containing format for images loaded via *magick
+ *
+ * @example
+ * const metadata = await sharp(input).metadata();
  *
  * @example
  * const image = sharp(inputJpg);
@@ -247,6 +468,17 @@ function _isStreamInput () {
  *     // data contains a WebP image half the width and height of the original JPEG
  *   });
  *
+ * @example
+ * // Based on EXIF rotation metadata, get the right-side-up width and height:
+ *
+ * const size = getNormalSize(await sharp(input).metadata());
+ *
+ * function getNormalSize({ width, height, orientation }) {
+ *   return (orientation || 0) >= 5
+ *     ? { width: height, height: width }
+ *     : { width, height };
+ * }
+ *
  * @param {Function} [callback] - called with the arguments `(err, metadata)`
  * @returns {Promise<Object>|Sharp}
  */
@@ -264,7 +496,7 @@ function metadata (callback) {
   } else {
     if (this._isStreamInput()) {
       return new Promise((resolve, reject) => {
-        this.on('finish', () => {
+        const finished = () => {
           this._flattenBufferIn();
           sharp.metadata(this.options, (err, metadata) => {
             if (err) {
@@ -273,7 +505,12 @@ function metadata (callback) {
               resolve(metadata);
             }
           });
-        });
+        };
+        if (this.writableFinished) {
+          finished();
+        } else {
+          this.once('finish', finished);
+        }
       });
     } else {
       return new Promise((resolve, reject) => {
@@ -305,9 +542,12 @@ function metadata (callback) {
  *     - `maxX` (x-coordinate of one of the pixel where the maximum lies)
  *     - `maxY` (y-coordinate of one of the pixel where the maximum lies)
  * - `isOpaque`: Is the image fully opaque? Will be `true` if the image has no alpha channel or if every pixel is fully opaque.
- * - `entropy`: Histogram-based estimation of greyscale entropy, discarding alpha channel if any (experimental)
- * - `sharpness`: Estimation of greyscale sharpness based on the standard deviation of a Laplacian convolution, discarding alpha channel if any (experimental)
- * - `dominant`: Object containing most dominant sRGB colour based on a 4096-bin 3D histogram (experimental)
+ * - `entropy`: Histogram-based estimation of greyscale entropy, discarding alpha channel if any.
+ * - `sharpness`: Estimation of greyscale sharpness based on the standard deviation of a Laplacian convolution, discarding alpha channel if any.
+ * - `dominant`: Object containing most dominant sRGB colour based on a 4096-bin 3D histogram.
+ *
+ * **Note**: Statistics are derived from the original input image. Any operations performed on the image must first be
+ * written to a buffer in order to run `stats` on the result (see third example).
  *
  * @example
  * const image = sharp(inputJpg);
@@ -321,6 +561,13 @@ function metadata (callback) {
  * const { entropy, sharpness, dominant } = await sharp(input).stats();
  * const { r, g, b } = dominant;
  *
+ * @example
+ * const image = sharp(input);
+ * // store intermediate result
+ * const part = await image.extract(region).toBuffer();
+ * // create new instance to obtain statistics of extracted region
+ * const stats = await sharp(part).stats();
+ *
  * @param {Function} [callback] - called with the arguments `(err, stats)`
  * @returns {Promise<Object>}
  */
@@ -379,4 +626,6 @@ module.exports = function (Sharp) {
     metadata,
     stats
   });
+  // Class attributes
+  Sharp.align = align;
 };

lib/is.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 /**
@@ -48,6 +51,37 @@ const buffer = function (val) {
   return val instanceof Buffer;
 };
 
+/**
+ * Is this value a typed array object?. E.g. Uint8Array or Uint8ClampedArray?
+ * @private
+ */
+const typedArray = function (val) {
+  if (defined(val)) {
+    switch (val.constructor) {
+      case Uint8Array:
+      case Uint8ClampedArray:
+      case Int8Array:
+      case Uint16Array:
+      case Int16Array:
+      case Uint32Array:
+      case Int32Array:
+      case Float32Array:
+      case Float64Array:
+        return true;
+    }
+  }
+
+  return false;
+};
+
+/**
+ * Is this value an ArrayBuffer object?
+ * @private
+ */
+const arrayBuffer = function (val) {
+  return val instanceof ArrayBuffer;
+};
+
 /**
  * Is this value a non-empty string?
  * @private
@@ -104,16 +138,18 @@ const invalidParameterError = function (name, expected, actual) {
 };
 
 module.exports = {
-  defined: defined,
-  object: object,
-  plainObject: plainObject,
-  fn: fn,
-  bool: bool,
-  buffer: buffer,
-  string: string,
-  number: number,
-  integer: integer,
-  inRange: inRange,
-  inArray: inArray,
-  invalidParameterError: invalidParameterError
+  defined,
+  object,
+  plainObject,
+  fn,
+  bool,
+  buffer,
+  typedArray,
+  arrayBuffer,
+  string,
+  number,
+  integer,
+  inRange,
+  inArray,
+  invalidParameterError
 };

lib/libvips.js

@@ -1,99 +1,153 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
-const fs = require('fs');
-const os = require('os');
-const path = require('path');
-const spawnSync = require('child_process').spawnSync;
-const semver = require('semver');
-const platform = require('./platform');
+const { spawnSync } = require('node:child_process');
+const semverCoerce = require('semver/functions/coerce');
+const semverGreaterThanOrEqualTo = require('semver/functions/gte');
+const detectLibc = require('detect-libc');
 
-const env = process.env;
-const minimumLibvipsVersionLabelled = env.npm_package_config_libvips || /* istanbul ignore next */
-  require('../package.json').config.libvips;
-const minimumLibvipsVersion = semver.coerce(minimumLibvipsVersionLabelled).version;
+const { engines } = require('../package.json');
+
+const minimumLibvipsVersionLabelled = process.env.npm_package_config_libvips || /* istanbul ignore next */
+  engines.libvips;
+const minimumLibvipsVersion = semverCoerce(minimumLibvipsVersionLabelled).version;
+
+const prebuiltPlatforms = [
+  'darwin-arm64', 'darwin-x64',
+  'linux-arm', 'linux-arm64', 'linux-x64',
+  'linuxmusl-arm64', 'linuxmusl-x64',
+  'win32-ia32', 'win32-x64'
+];
 
 const spawnSyncOptions = {
   encoding: 'utf8',
   shell: true
 };
 
-const mkdirSync = function (dirPath) {
-  try {
-    fs.mkdirSync(dirPath);
-  } catch (err) {
-    /* istanbul ignore if */
-    if (err.code !== 'EEXIST') {
-      throw err;
-    }
+const log = (item) => {
+  if (item instanceof Error) {
+    console.error(`sharp: Installation error: ${item.message}`);
+  } else {
+    console.log(`sharp: ${item}`);
   }
 };
 
-const cachePath = function () {
-  const npmCachePath = env.npm_config_cache || /* istanbul ignore next */
-    (env.APPDATA ? path.join(env.APPDATA, 'npm-cache') : path.join(os.homedir(), '.npm'));
-  mkdirSync(npmCachePath);
-  const libvipsCachePath = path.join(npmCachePath, '_libvips');
-  mkdirSync(libvipsCachePath);
-  return libvipsCachePath;
+/* istanbul ignore next */
+const runtimeLibc = () => detectLibc.isNonGlibcLinuxSync() ? detectLibc.familySync() : '';
+
+const runtimePlatformArch = () => `${process.platform}${runtimeLibc()}-${process.arch}`;
+
+/* istanbul ignore next */
+const buildPlatformArch = () => {
+  /* eslint camelcase: ["error", { allow: ["^npm_config_"] }] */
+  const { npm_config_arch, npm_config_platform, npm_config_libc } = process.env;
+  return `${npm_config_platform || process.platform}${npm_config_libc || runtimeLibc()}-${npm_config_arch || process.arch}`;
 };
 
-const globalLibvipsVersion = function () {
+const buildSharpLibvipsIncludeDir = () => {
+  try {
+    return require('@sharpen/sharp-libvips-dev/include');
+  } catch {}
+  /* istanbul ignore next */
+  return '';
+};
+
+const buildSharpLibvipsCPlusPlusDir = () => {
+  try {
+    return require('@sharpen/sharp-libvips-dev/cplusplus');
+  } catch {}
+  /* istanbul ignore next */
+  return '';
+};
+
+const buildSharpLibvipsLibDir = () => {
+  try {
+    return require(`@sharpen/sharp-libvips-${buildPlatformArch()}/lib`);
+  } catch {}
+  /* istanbul ignore next */
+  return '';
+};
+
+const isRosetta = () => {
+  /* istanbul ignore next */
+  if (process.platform === 'darwin' && process.arch === 'x64') {
+    const translated = spawnSync('sysctl sysctl.proc_translated', spawnSyncOptions).stdout;
+    return (translated || '').trim() === 'sysctl.proc_translated: 1';
+  }
+  return false;
+};
+
+/* istanbul ignore next */
+const gypRebuild = () =>
+  spawnSync('node-gyp rebuild', {
+    ...spawnSyncOptions,
+    stdio: 'inherit'
+  }).status;
+
+const globalLibvipsVersion = () => {
   if (process.platform !== 'win32') {
-    const globalLibvipsVersion = spawnSync(`PKG_CONFIG_PATH="${pkgConfigPath()}" pkg-config --modversion vips-cpp`, spawnSyncOptions).stdout || '';
-    return globalLibvipsVersion.trim();
+    const globalLibvipsVersion = spawnSync('pkg-config --modversion vips-cpp', {
+      ...spawnSyncOptions,
+      env: {
+        ...process.env,
+        PKG_CONFIG_PATH: pkgConfigPath()
+      }
+    }).stdout;
+    /* istanbul ignore next */
+    return (globalLibvipsVersion || '').trim();
   } else {
     return '';
   }
 };
 
-const hasVendoredLibvips = function () {
-  const currentPlatformId = platform();
-  const vendorPath = path.join(__dirname, '..', 'vendor', minimumLibvipsVersion);
-  let vendorPlatformId;
-  try {
-    vendorPlatformId = require(path.join(vendorPath, 'platform.json'));
-  } catch (err) {}
-  /* istanbul ignore else */
-  if (vendorPlatformId) {
-    /* istanbul ignore else */
-    if (currentPlatformId === vendorPlatformId) {
-      return true;
-    } else {
-      throw new Error(`'${vendorPlatformId}' binaries cannot be used on the '${currentPlatformId}' platform. Please remove the 'node_modules/sharp' directory and run 'npm install' on the '${currentPlatformId}' platform.`);
-    }
-  } else {
-    return false;
-  }
-};
-
-const pkgConfigPath = function () {
+/* istanbul ignore next */
+const pkgConfigPath = () => {
   if (process.platform !== 'win32') {
-    const brewPkgConfigPath = spawnSync('which brew >/dev/null 2>&1 && eval $(brew --env) && echo $PKG_CONFIG_LIBDIR', spawnSyncOptions).stdout || '';
-    return [brewPkgConfigPath.trim(), env.PKG_CONFIG_PATH, '/usr/local/lib/pkgconfig', '/usr/lib/pkgconfig']
-      .filter(function (p) { return !!p; })
-      .join(':');
+    const brewPkgConfigPath = spawnSync(
+      'which brew >/dev/null 2>&1 && brew environment --plain | grep PKG_CONFIG_LIBDIR | cut -d" " -f2',
+      spawnSyncOptions
+    ).stdout || '';
+    return [
+      brewPkgConfigPath.trim(),
+      process.env.PKG_CONFIG_PATH,
+      '/usr/local/lib/pkgconfig',
+      '/usr/lib/pkgconfig',
+      '/usr/local/libdata/pkgconfig',
+      '/usr/libdata/pkgconfig'
+    ].filter(Boolean).join(':');
   } else {
     return '';
   }
 };
 
-const useGlobalLibvips = function () {
-  if (Boolean(env.SHARP_IGNORE_GLOBAL_LIBVIPS) === true) {
+const useGlobalLibvips = () => {
+  if (Boolean(process.env.SHARP_IGNORE_GLOBAL_LIBVIPS) === true) {
+    log('Detected SHARP_IGNORE_GLOBAL_LIBVIPS, skipping search for globally-installed libvips');
+    return false;
+  }
+  /* istanbul ignore next */
+  if (isRosetta()) {
+    log('Detected Rosetta, skipping search for globally-installed libvips');
     return false;
   }
-
   const globalVipsVersion = globalLibvipsVersion();
   return !!globalVipsVersion && /* istanbul ignore next */
-    semver.gte(globalVipsVersion, minimumLibvipsVersion);
+    semverGreaterThanOrEqualTo(globalVipsVersion, minimumLibvipsVersion);
 };
 
 module.exports = {
   minimumLibvipsVersion,
-  minimumLibvipsVersionLabelled,
-  cachePath,
+  prebuiltPlatforms,
+  buildPlatformArch,
+  buildSharpLibvipsIncludeDir,
+  buildSharpLibvipsCPlusPlusDir,
+  buildSharpLibvipsLibDir,
+  runtimePlatformArch,
+  log,
+  gypRebuild,
   globalLibvipsVersion,
-  hasVendoredLibvips,
   pkgConfigPath,
-  useGlobalLibvips,
-  mkdirSync
+  useGlobalLibvips
 };

lib/operation.js

@@ -1,6 +1,8 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
-const { flatten: flattenArray } = require('array-flatten');
 const color = require('color');
 const is = require('./is');
 
@@ -9,7 +11,7 @@ const is = require('./is');
  * or auto-orient based on the EXIF `Orientation` tag.
  *
  * If an angle is provided, it is converted to a valid positive degree rotation.
- * For example, `-450` will produce a 270deg rotation.
+ * For example, `-450` will produce a 270 degree rotation.
  *
  * When rotating by an angle other than a multiple of 90,
  * the background colour can be provided with the `background` option.
@@ -17,10 +19,13 @@ const is = require('./is');
  * If no angle is provided, it is determined from the EXIF data.
  * Mirroring is supported and may infer the use of a flip operation.
  *
- * The use of `rotate` implies the removal of the EXIF `Orientation` tag, if any.
+ * The use of `rotate` without an angle will remove the EXIF `Orientation` tag, if any.
  *
- * Method order is important when both rotating and extracting regions,
- * for example `rotate(x).extract(y)` will produce a different result to `extract(y).rotate(x)`.
+ * Only one rotation can occur per pipeline.
+ * Previous calls to `rotate` in the same pipeline will be ignored.
+ *
+ * Method order is important when rotating, resizing and/or extracting regions,
+ * for example `.rotate(x).extract(y)` will produce a different result to `.extract(y).rotate(x)`.
  *
  * @example
  * const pipeline = sharp()
@@ -33,6 +38,16 @@ const is = require('./is');
  *   });
  * readableStream.pipe(pipeline);
  *
+ * @example
+ * const rotateThenResize = await sharp(input)
+ *   .rotate(90)
+ *   .resize({ width: 16, height: 8, fit: 'fill' })
+ *   .toBuffer();
+ * const resizeThenRotate = await sharp(input)
+ *   .resize({ width: 16, height: 8, fit: 'fill' })
+ *   .rotate(90)
+ *   .toBuffer();
+ *
  * @param {number} [angle=auto] angle of rotation.
  * @param {Object} [options] - if present, is an Object with optional attributes.
  * @param {string|Object} [options.background="#000000"] parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
@@ -40,6 +55,9 @@ const is = require('./is');
  * @throws {Error} Invalid parameters
  */
 function rotate (angle, options) {
+  if (this.options.useExifOrientation || this.options.angle || this.options.rotationAngle) {
+    this.options.debuglog('ignoring previous rotate options');
+  }
   if (!is.defined(angle)) {
     this.options.useExifOrientation = true;
   } else if (is.integer(angle) && !(angle % 90)) {
@@ -62,8 +80,14 @@ function rotate (angle, options) {
 }
 
 /**
- * Flip the image about the vertical Y axis. This always occurs after rotation, if any.
- * The use of `flip` implies the removal of the EXIF `Orientation` tag, if any.
+ * Mirror the image vertically (up-down) about the x-axis.
+ * This always occurs before rotation, if any.
+ *
+ * This operation does not work correctly with multi-page images.
+ *
+ * @example
+ * const output = await sharp(input).flip().toBuffer();
+ *
  * @param {Boolean} [flip=true]
  * @returns {Sharp}
  */
@@ -73,8 +97,12 @@ function flip (flip) {
 }
 
 /**
- * Flop the image about the horizontal X axis. This always occurs after rotation, if any.
- * The use of `flop` implies the removal of the EXIF `Orientation` tag, if any.
+ * Mirror the image horizontally (left-right) about the y-axis.
+ * This always occurs before rotation, if any.
+ *
+ * @example
+ * const output = await sharp(input).flop().toBuffer();
+ *
  * @param {Boolean} [flop=true]
  * @returns {Sharp}
  */
@@ -88,7 +116,7 @@ function flop (flop) {
  *
  * You must provide an array of length 4 or a 2x2 affine transformation matrix.
  * By default, new pixels are filled with a black background. You can provide a background color with the `background` option.
- * A particular interpolator may also be specified. Set the `interpolator` option to an attribute of the `sharp.interpolator` Object e.g. `sharp.interpolator.nohalo`.
+ * A particular interpolator may also be specified. Set the `interpolator` option to an attribute of the `sharp.interpolators` Object e.g. `sharp.interpolators.nohalo`.
  *
  * In the case of a 2x2 matrix, the transform is:
  * - X = `matrix[0, 0]` \* (x + `idx`) + `matrix[0, 1]` \* (y + `idy`) + `odx`
@@ -105,7 +133,7 @@ function flop (flop) {
  * const pipeline = sharp()
  *   .affine([[1, 0.3], [0.1, 0.7]], {
  *      background: 'white',
- *      interpolate: sharp.interpolators.nohalo
+ *      interpolator: sharp.interpolators.nohalo
  *   })
  *   .toBuffer((err, outputBuffer, info) => {
  *      // outputBuffer contains the transformed image
@@ -127,7 +155,7 @@ function flop (flop) {
  * @throws {Error} Invalid parameters
  */
 function affine (matrix, options) {
-  const flatMatrix = flattenArray(matrix);
+  const flatMatrix = [].concat(...matrix);
   if (flatMatrix.length === 4 && flatMatrix.every(is.number)) {
     this.options.affineMatrix = flatMatrix;
   } else {
@@ -182,44 +210,113 @@ function affine (matrix, options) {
 
 /**
  * Sharpen the image.
- * When used without parameters, performs a fast, mild sharpen of the output image.
- * When a `sigma` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space.
- * Separate control over the level of sharpening in "flat" and "jagged" areas is available.
  *
- * @param {number} [sigma] - the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
- * @param {number} [flat=1.0] - the level of sharpening to apply to "flat" areas.
- * @param {number} [jagged=2.0] - the level of sharpening to apply to "jagged" areas.
+ * When used without parameters, performs a fast, mild sharpen of the output image.
+ *
+ * When a `sigma` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space.
+ * Fine-grained control over the level of sharpening in "flat" (m1) and "jagged" (m2) areas is available.
+ *
+ * See {@link https://www.libvips.org/API/current/libvips-convolution.html#vips-sharpen|libvips sharpen} operation.
+ *
+ * @example
+ * const data = await sharp(input).sharpen().toBuffer();
+ *
+ * @example
+ * const data = await sharp(input).sharpen({ sigma: 2 }).toBuffer();
+ *
+ * @example
+ * const data = await sharp(input)
+ *   .sharpen({
+ *     sigma: 2,
+ *     m1: 0,
+ *     m2: 3,
+ *     x1: 3,
+ *     y2: 15,
+ *     y3: 15,
+ *   })
+ *   .toBuffer();
+ *
+ * @param {Object|number} [options] - if present, is an Object with attributes
+ * @param {number} [options.sigma] - the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`, between 0.000001 and 10
+ * @param {number} [options.m1=1.0] - the level of sharpening to apply to "flat" areas, between 0 and 1000000
+ * @param {number} [options.m2=2.0] - the level of sharpening to apply to "jagged" areas, between 0 and 1000000
+ * @param {number} [options.x1=2.0] - threshold between "flat" and "jagged", between 0 and 1000000
+ * @param {number} [options.y2=10.0] - maximum amount of brightening, between 0 and 1000000
+ * @param {number} [options.y3=20.0] - maximum amount of darkening, between 0 and 1000000
+ * @param {number} [flat] - (deprecated) see `options.m1`.
+ * @param {number} [jagged] - (deprecated) see `options.m2`.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-function sharpen (sigma, flat, jagged) {
-  if (!is.defined(sigma)) {
+function sharpen (options, flat, jagged) {
+  if (!is.defined(options)) {
     // No arguments: default to mild sharpen
     this.options.sharpenSigma = -1;
-  } else if (is.bool(sigma)) {
-    // Boolean argument: apply mild sharpen?
-    this.options.sharpenSigma = sigma ? -1 : 0;
-  } else if (is.number(sigma) && is.inRange(sigma, 0.01, 10000)) {
-    // Numeric argument: specific sigma
-    this.options.sharpenSigma = sigma;
-    // Control over flat areas
+  } else if (is.bool(options)) {
+    // Deprecated boolean argument: apply mild sharpen?
+    this.options.sharpenSigma = options ? -1 : 0;
+  } else if (is.number(options) && is.inRange(options, 0.01, 10000)) {
+    // Deprecated numeric argument: specific sigma
+    this.options.sharpenSigma = options;
+    // Deprecated control over flat areas
     if (is.defined(flat)) {
       if (is.number(flat) && is.inRange(flat, 0, 10000)) {
-        this.options.sharpenFlat = flat;
+        this.options.sharpenM1 = flat;
       } else {
         throw is.invalidParameterError('flat', 'number between 0 and 10000', flat);
       }
     }
-    // Control over jagged areas
+    // Deprecated control over jagged areas
     if (is.defined(jagged)) {
       if (is.number(jagged) && is.inRange(jagged, 0, 10000)) {
-        this.options.sharpenJagged = jagged;
+        this.options.sharpenM2 = jagged;
       } else {
         throw is.invalidParameterError('jagged', 'number between 0 and 10000', jagged);
       }
     }
+  } else if (is.plainObject(options)) {
+    if (is.number(options.sigma) && is.inRange(options.sigma, 0.000001, 10)) {
+      this.options.sharpenSigma = options.sigma;
+    } else {
+      throw is.invalidParameterError('options.sigma', 'number between 0.000001 and 10', options.sigma);
+    }
+    if (is.defined(options.m1)) {
+      if (is.number(options.m1) && is.inRange(options.m1, 0, 1000000)) {
+        this.options.sharpenM1 = options.m1;
+      } else {
+        throw is.invalidParameterError('options.m1', 'number between 0 and 1000000', options.m1);
+      }
+    }
+    if (is.defined(options.m2)) {
+      if (is.number(options.m2) && is.inRange(options.m2, 0, 1000000)) {
+        this.options.sharpenM2 = options.m2;
+      } else {
+        throw is.invalidParameterError('options.m2', 'number between 0 and 1000000', options.m2);
+      }
+    }
+    if (is.defined(options.x1)) {
+      if (is.number(options.x1) && is.inRange(options.x1, 0, 1000000)) {
+        this.options.sharpenX1 = options.x1;
+      } else {
+        throw is.invalidParameterError('options.x1', 'number between 0 and 1000000', options.x1);
+      }
+    }
+    if (is.defined(options.y2)) {
+      if (is.number(options.y2) && is.inRange(options.y2, 0, 1000000)) {
+        this.options.sharpenY2 = options.y2;
+      } else {
+        throw is.invalidParameterError('options.y2', 'number between 0 and 1000000', options.y2);
+      }
+    }
+    if (is.defined(options.y3)) {
+      if (is.number(options.y3) && is.inRange(options.y3, 0, 1000000)) {
+        this.options.sharpenY3 = options.y3;
+      } else {
+        throw is.invalidParameterError('options.y3', 'number between 0 and 1000000', options.y3);
+      }
+    }
   } else {
-    throw is.invalidParameterError('sigma', 'number between 0.01 and 10000', sigma);
+    throw is.invalidParameterError('sigma', 'number between 0.01 and 10000', options);
   }
   return this;
 }
@@ -227,6 +324,13 @@ function sharpen (sigma, flat, jagged) {
 /**
  * Apply median filter.
  * When used without parameters the default window is 3x3.
+ *
+ * @example
+ * const output = await sharp(input).median().toBuffer();
+ *
+ * @example
+ * const output = await sharp(input).median(5).toBuffer();
+ *
  * @param {number} [size=3] square mask size: size x size
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -246,8 +350,21 @@ function median (size) {
 
 /**
  * Blur the image.
- * When used without parameters, performs a fast, mild blur of the output image.
+ *
+ * When used without parameters, performs a fast 3x3 box blur (equivalent to a box linear filter).
+ *
  * When a `sigma` is provided, performs a slower, more accurate Gaussian blur.
+ *
+ * @example
+ * const boxBlurred = await sharp(input)
+ *   .blur()
+ *   .toBuffer();
+ *
+ * @example
+ * const gaussianBlurred = await sharp(input)
+ *   .blur(5)
+ *   .toBuffer();
+ *
  * @param {number} [sigma] a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -269,7 +386,15 @@ function blur (sigma) {
 }
 
 /**
- * Merge alpha transparency channel, if any, with a background.
+ * Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
+ *
+ * See also {@link /api-channel#removealpha|removeAlpha}.
+ *
+ * @example
+ * await sharp(rgbaInput)
+ *   .flatten({ background: '#F0A703' })
+ *   .toBuffer();
+ *
  * @param {Object} [options]
  * @param {string|Object} [options.background={r: 0, g: 0, b: 0}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black.
  * @returns {Sharp}
@@ -282,6 +407,32 @@ function flatten (options) {
   return this;
 }
 
+/**
+ * Ensure the image has an alpha channel
+ * with all white pixel values made fully transparent.
+ *
+ * Existing alpha channel values for non-white pixels remain unchanged.
+ *
+ * This feature is experimental and the API may change.
+ *
+ * @since 0.32.1
+ *
+ * @example
+ * await sharp(rgbInput)
+ *   .unflatten()
+ *   .toBuffer();
+ *
+ * @example
+ * await sharp(rgbInput)
+ *   .threshold(128, { grayscale: false }) // converter bright pixels to white
+ *   .unflatten()
+ *   .toBuffer();
+ */
+function unflatten () {
+  this.options.unflatten = true;
+  return this;
+}
+
 /**
  * Apply a gamma correction by reducing the encoding (darken) pre-resize at a factor of `1/gamma`
  * then increasing the encoding (brighten) post-resize at a factor of `gamma`.
@@ -318,31 +469,144 @@ function gamma (gamma, gammaOut) {
 
 /**
  * Produce the "negative" of the image.
- * @param {Boolean} [negate=true]
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .negate()
+ *   .toBuffer();
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .negate({ alpha: false })
+ *   .toBuffer();
+ *
+ * @param {Object} [options]
+ * @param {Boolean} [options.alpha=true] Whether or not to negate any alpha channel
  * @returns {Sharp}
  */
-function negate (negate) {
-  this.options.negate = is.bool(negate) ? negate : true;
+function negate (options) {
+  this.options.negate = is.bool(options) ? options : true;
+  if (is.plainObject(options) && 'alpha' in options) {
+    if (!is.bool(options.alpha)) {
+      throw is.invalidParameterError('alpha', 'should be boolean value', options.alpha);
+    } else {
+      this.options.negateAlpha = options.alpha;
+    }
+  }
   return this;
 }
 
 /**
- * Enhance output image contrast by stretching its luminance to cover the full dynamic range.
- * @param {Boolean} [normalise=true]
+ * Enhance output image contrast by stretching its luminance to cover a full dynamic range.
+ *
+ * Uses a histogram-based approach, taking a default range of 1% to 99% to reduce sensitivity to noise at the extremes.
+ *
+ * Luminance values below the `lower` percentile will be underexposed by clipping to zero.
+ * Luminance values above the `upper` percentile will be overexposed by clipping to the max pixel value.
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .normalise()
+ *   .toBuffer();
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .normalise({ lower: 0, upper: 100 })
+ *   .toBuffer();
+ *
+ * @param {Object} [options]
+ * @param {number} [options.lower=1] - Percentile below which luminance values will be underexposed.
+ * @param {number} [options.upper=99] - Percentile above which luminance values will be overexposed.
  * @returns {Sharp}
  */
-function normalise (normalise) {
-  this.options.normalise = is.bool(normalise) ? normalise : true;
+function normalise (options) {
+  if (is.plainObject(options)) {
+    if (is.defined(options.lower)) {
+      if (is.number(options.lower) && is.inRange(options.lower, 0, 99)) {
+        this.options.normaliseLower = options.lower;
+      } else {
+        throw is.invalidParameterError('lower', 'number between 0 and 99', options.lower);
+      }
+    }
+    if (is.defined(options.upper)) {
+      if (is.number(options.upper) && is.inRange(options.upper, 1, 100)) {
+        this.options.normaliseUpper = options.upper;
+      } else {
+        throw is.invalidParameterError('upper', 'number between 1 and 100', options.upper);
+      }
+    }
+  }
+  if (this.options.normaliseLower >= this.options.normaliseUpper) {
+    throw is.invalidParameterError('range', 'lower to be less than upper',
+      `${this.options.normaliseLower} >= ${this.options.normaliseUpper}`);
+  }
+  this.options.normalise = true;
   return this;
 }
 
 /**
  * Alternative spelling of normalise.
- * @param {Boolean} [normalize=true]
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .normalize()
+ *   .toBuffer();
+ *
+ * @param {Object} [options]
+ * @param {number} [options.lower=1] - Percentile below which luminance values will be underexposed.
+ * @param {number} [options.upper=99] - Percentile above which luminance values will be overexposed.
  * @returns {Sharp}
  */
-function normalize (normalize) {
-  return this.normalise(normalize);
+function normalize (options) {
+  return this.normalise(options);
+}
+
+/**
+ * Perform contrast limiting adaptive histogram equalization
+ * {@link https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE|CLAHE}.
+ *
+ * This will, in general, enhance the clarity of the image by bringing out darker details.
+ *
+ * @since 0.28.3
+ *
+ * @example
+ * const output = await sharp(input)
+ *   .clahe({
+ *     width: 3,
+ *     height: 3,
+ *   })
+ *   .toBuffer();
+ *
+ * @param {Object} options
+ * @param {number} options.width - Integral width of the search window, in pixels.
+ * @param {number} options.height - Integral height of the search window, in pixels.
+ * @param {number} [options.maxSlope=3] - Integral level of brightening, between 0 and 100, where 0 disables contrast limiting.
+ * @returns {Sharp}
+ * @throws {Error} Invalid parameters
+ */
+function clahe (options) {
+  if (is.plainObject(options)) {
+    if (is.integer(options.width) && options.width > 0) {
+      this.options.claheWidth = options.width;
+    } else {
+      throw is.invalidParameterError('width', 'integer greater than zero', options.width);
+    }
+    if (is.integer(options.height) && options.height > 0) {
+      this.options.claheHeight = options.height;
+    } else {
+      throw is.invalidParameterError('height', 'integer greater than zero', options.height);
+    }
+    if (is.defined(options.maxSlope)) {
+      if (is.integer(options.maxSlope) && is.inRange(options.maxSlope, 0, 100)) {
+        this.options.claheMaxSlope = options.maxSlope;
+      } else {
+        throw is.invalidParameterError('maxSlope', 'integer between 0 and 100', options.maxSlope);
+      }
+    }
+  } else {
+    throw is.invalidParameterError('options', 'plain object', options);
+  }
+  return this;
 }
 
 /**
@@ -363,7 +627,7 @@ function normalize (normalize) {
  *
  * @param {Object} kernel
  * @param {number} kernel.width - width of the kernel in pixels.
- * @param {number} kernel.height - width of the kernel in pixels.
+ * @param {number} kernel.height - height of the kernel in pixels.
  * @param {Array<number>} kernel.kernel - Array of length `width*height` containing the kernel values.
  * @param {number} [kernel.scale=sum] - the scale of the kernel in pixels.
  * @param {number} [kernel.offset=0] - the offset of the kernel in pixels.
@@ -397,7 +661,7 @@ function convolve (kernel) {
 }
 
 /**
- * Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
+ * Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
  * @param {number} [threshold=128] - a value in the range 0-255 representing the level at which the threshold will be applied.
  * @param {Object} [options]
  * @param {Boolean} [options.greyscale=true] - convert to single channel greyscale.
@@ -450,32 +714,61 @@ function boolean (operand, operator, options) {
 }
 
 /**
- * Apply the linear formula a * input + b to the image (levels adjustment)
- * @param {number} [a=1.0] multiplier
- * @param {number} [b=0.0] offset
+ * Apply the linear formula `a` * input + `b` to the image to adjust image levels.
+ *
+ * When a single number is provided, it will be used for all image channels.
+ * When an array of numbers is provided, the array length must match the number of channels.
+ *
+ * @example
+ * await sharp(input)
+ *   .linear(0.5, 2)
+ *   .toBuffer();
+ *
+ * @example
+ * await sharp(rgbInput)
+ *   .linear(
+ *     [0.25, 0.5, 0.75],
+ *     [150, 100, 50]
+ *   )
+ *   .toBuffer();
+ *
+ * @param {(number|number[])} [a=[]] multiplier
+ * @param {(number|number[])} [b=[]] offset
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
 function linear (a, b) {
+  if (!is.defined(a) && is.number(b)) {
+    a = 1.0;
+  } else if (is.number(a) && !is.defined(b)) {
+    b = 0.0;
+  }
   if (!is.defined(a)) {
-    this.options.linearA = 1.0;
+    this.options.linearA = [];
   } else if (is.number(a)) {
+    this.options.linearA = [a];
+  } else if (Array.isArray(a) && a.length && a.every(is.number)) {
     this.options.linearA = a;
   } else {
-    throw is.invalidParameterError('a', 'numeric', a);
+    throw is.invalidParameterError('a', 'number or array of numbers', a);
   }
   if (!is.defined(b)) {
-    this.options.linearB = 0.0;
+    this.options.linearB = [];
   } else if (is.number(b)) {
+    this.options.linearB = [b];
+  } else if (Array.isArray(b) && b.length && b.every(is.number)) {
     this.options.linearB = b;
   } else {
-    throw is.invalidParameterError('b', 'numeric', b);
+    throw is.invalidParameterError('b', 'number or array of numbers', b);
+  }
+  if (this.options.linearA.length !== this.options.linearB.length) {
+    throw new Error('Expected a and b to be arrays of the same length');
   }
   return this;
 }
 
 /**
- * Recomb the image with the specified matrix.
+ * Recombine the image with the specified matrix.
  *
  * @since 0.21.1
  *
@@ -488,7 +781,7 @@ function linear (a, b) {
  *   ])
  *   .raw()
  *   .toBuffer(function(err, data, info) {
- *     // data contains the raw pixel data after applying the recomb
+ *     // data contains the raw pixel data after applying the matrix
  *     // With this example input, a sepia filter has been applied
  *   });
  *
@@ -514,33 +807,51 @@ function recomb (inputMatrix) {
 }
 
 /**
- * Transforms the image using brightness, saturation and hue rotation.
+ * Transforms the image using brightness, saturation, hue rotation, and lightness.
+ * Brightness and lightness both operate on luminance, with the difference being that
+ * brightness is multiplicative whereas lightness is additive.
  *
  * @since 0.22.1
  *
  * @example
- * sharp(input)
+ * // increase brightness by a factor of 2
+ * const output = await sharp(input)
  *   .modulate({
- *     brightness: 2 // increase lightness by a factor of 2
- *   });
+ *     brightness: 2
+ *   })
+ *   .toBuffer();
  *
- * sharp(input)
+ * @example
+ * // hue-rotate by 180 degrees
+ * const output = await sharp(input)
  *   .modulate({
- *     hue: 180 // hue-rotate by 180 degrees
- *   });
+ *     hue: 180
+ *   })
+ *   .toBuffer();
  *
- * // decreate brightness and saturation while also hue-rotating by 90 degrees
- * sharp(input)
+ * @example
+ * // increase lightness by +50
+ * const output = await sharp(input)
+ *   .modulate({
+ *     lightness: 50
+ *   })
+ *   .toBuffer();
+ *
+ * @example
+ * // decrease brightness and saturation while also hue-rotating by 90 degrees
+ * const output = await sharp(input)
  *   .modulate({
  *     brightness: 0.5,
  *     saturation: 0.5,
- *     hue: 90
- *   });
+ *     hue: 90,
+ *   })
+ *   .toBuffer();
  *
  * @param {Object} [options]
  * @param {number} [options.brightness] Brightness multiplier
  * @param {number} [options.saturation] Saturation multiplier
  * @param {number} [options.hue] Degrees for hue rotation
+ * @param {number} [options.lightness] Lightness addend
  * @returns {Sharp}
  */
 function modulate (options) {
@@ -568,6 +879,13 @@ function modulate (options) {
       throw is.invalidParameterError('hue', 'number', options.hue);
     }
   }
+  if ('lightness' in options) {
+    if (is.number(options.lightness)) {
+      this.options.lightness = options.lightness;
+    } else {
+      throw is.invalidParameterError('lightness', 'number', options.lightness);
+    }
+  }
   return this;
 }
 
@@ -585,10 +903,12 @@ module.exports = function (Sharp) {
     median,
     blur,
     flatten,
+    unflatten,
     gamma,
     negate,
     normalise,
     normalize,
+    clahe,
     convolve,
     threshold,
     boolean,

lib/platform.js

@@ -1,25 +0,0 @@
-'use strict';
-
-const detectLibc = require('detect-libc');
-
-const env = process.env;
-
-module.exports = function () {
-  const arch = env.npm_config_arch || process.arch;
-  const platform = env.npm_config_platform || process.platform;
-  /* istanbul ignore next */
-  const libc = (platform === 'linux' && detectLibc.isNonGlibcLinux) ? detectLibc.family : '';
-
-  const platformId = [`${platform}${libc}`];
-
-  if (arch === 'arm') {
-    const fallback = process.versions.electron ? '7' : '6';
-    platformId.push(`armv${env.npm_config_arm_version || process.config.variables.arm_version || fallback}`);
-  } else if (arch === 'arm64') {
-    platformId.push(`arm64v${env.npm_config_arm_version || '8'}`);
-  } else {
-    platformId.push(arch);
-  }
-
-  return platformId.join('-');
-};

lib/resize.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 const is = require('./is');
@@ -36,6 +39,18 @@ const position = {
   'left top': 8
 };
 
+/**
+ * How to extend the image.
+ * @member
+ * @private
+ */
+const extendWith = {
+  background: 'background',
+  copy: 'copy',
+  repeat: 'repeat',
+  mirror: 'mirror'
+};
+
 /**
  * Strategies for automagic cover behaviour.
  * @member
@@ -92,11 +107,18 @@ function isRotationExpected (options) {
   return (options.angle % 360) !== 0 || options.useExifOrientation === true || options.rotationAngle !== 0;
 }
 
+/**
+ * @private
+ */
+function isResizeExpected (options) {
+  return options.width !== -1 || options.height !== -1;
+}
+
 /**
  * Resize image to `width`, `height` or `width x height`.
  *
  * When both a `width` and `height` are provided, the possible methods by which the image should **fit** these are:
- * - `cover`: (default) Preserving aspect ratio, ensure the image covers both provided dimensions by cropping/clipping to fit.
+ * - `cover`: (default) Preserving aspect ratio, attempt to ensure the image covers both provided dimensions by cropping/clipping to fit.
  * - `contain`: Preserving aspect ratio, contain within both provided dimensions using "letterboxing" where necessary.
  * - `fill`: Ignore the aspect ratio of the input and stretch to both provided dimensions.
  * - `inside`: Preserving aspect ratio, resize the image to be as large as possible while ensuring its dimensions are less than or equal to both those specified.
@@ -104,7 +126,9 @@ function isRotationExpected (options) {
  *
  * Some of these values are based on the [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit) CSS property.
  *
- * When using a `fit` of `cover` or `contain`, the default **position** is `centre`. Other options are:
+ * <img alt="Examples of various values for the fit property when resizing" width="100%" style="aspect-ratio: 998/243" src="https://cdn.jsdelivr.net/gh/lovell/sharp@main/docs/image/api-resize-fit.svg">
+ *
+ * When using a **fit** of `cover` or `contain`, the default **position** is `centre`. Other options are:
  * - `sharp.position`: `top`, `right top`, `right`, `right bottom`, `bottom`, `left bottom`, `left`, `left top`.
  * - `sharp.gravity`: `north`, `northeast`, `east`, `southeast`, `south`, `southwest`, `west`, `northwest`, `center` or `centre`.
  * - `sharp.strategy`: `cover` only, dynamically crop using either the `entropy` or `attention` strategy.
@@ -123,6 +147,9 @@ function isRotationExpected (options) {
  * - `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
  * - `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
  *
+ * Only one resize can occur per pipeline.
+ * Previous calls to `resize` in the same pipeline will be ignored.
+ *
  * @example
  * sharp(input)
  *   .resize({ width: 100 })
@@ -183,6 +210,20 @@ function isRotationExpected (options) {
  *   });
  *
  * @example
+ * sharp(input)
+ *   .resize(200, 200, {
+ *     fit: sharp.fit.outside,
+ *     withoutReduction: true
+ *   })
+ *   .toFormat('jpeg')
+ *   .toBuffer()
+ *   .then(function(outputBuffer) {
+ *     // outputBuffer contains JPEG image data
+ *     // of at least 200 pixels wide and 200 pixels high while maintaining aspect ratio
+ *     // and no smaller than the input image
+ *   });
+ *
+ * @example
  * const scaleByHalf = await sharp(input)
  *   .metadata()
  *   .then(({ width }) => sharp(input)
@@ -190,28 +231,35 @@ function isRotationExpected (options) {
  *     .toBuffer()
  *   );
  *
- * @param {number} [width] - pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
- * @param {number} [height] - pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
+ * @param {number} [width] - How many pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
+ * @param {number} [height] - How many pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
  * @param {Object} [options]
- * @param {String} [options.width] - alternative means of specifying `width`. If both are present this take priority.
- * @param {String} [options.height] - alternative means of specifying `height`. If both are present this take priority.
- * @param {String} [options.fit='cover'] - how the image should be resized to fit both provided dimensions, one of `cover`, `contain`, `fill`, `inside` or `outside`.
- * @param {String} [options.position='centre'] - position, gravity or strategy to use when `fit` is `cover` or `contain`.
- * @param {String|Object} [options.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour when using a `fit` of `contain`, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
- * @param {String} [options.kernel='lanczos3'] - the kernel to use for image reduction.
- * @param {Boolean} [options.withoutEnlargement=false] - do not enlarge if the width *or* height are already less than the specified dimensions, equivalent to GraphicsMagick's `>` geometry option.
- * @param {Boolean} [options.fastShrinkOnLoad=true] - take greater advantage of the JPEG and WebP shrink-on-load feature, which can lead to a slight moiré pattern on some images.
+ * @param {number} [options.width] - An alternative means of specifying `width`. If both are present this takes priority.
+ * @param {number} [options.height] - An alternative means of specifying `height`. If both are present this takes priority.
+ * @param {String} [options.fit='cover'] - How the image should be resized/cropped to fit the target dimension(s), one of `cover`, `contain`, `fill`, `inside` or `outside`.
+ * @param {String} [options.position='centre'] - A position, gravity or strategy to use when `fit` is `cover` or `contain`.
+ * @param {String|Object} [options.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour when `fit` is `contain`, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
+ * @param {String} [options.kernel='lanczos3'] - The kernel to use for image reduction. Use the `fastShrinkOnLoad` option to control kernel vs shrink-on-load.
+ * @param {Boolean} [options.withoutEnlargement=false] - Do not scale up if the width *or* height are already less than the target dimensions, equivalent to GraphicsMagick's `>` geometry option. This may result in output dimensions smaller than the target dimensions.
+ * @param {Boolean} [options.withoutReduction=false] - Do not scale down if the width *or* height are already greater than the target dimensions, equivalent to GraphicsMagick's `<` geometry option. This may still result in a crop to reach the target dimensions.
+ * @param {Boolean} [options.fastShrinkOnLoad=true] - Take greater advantage of the JPEG and WebP shrink-on-load feature, which can lead to a slight moiré pattern or round-down of an auto-scaled dimension.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-function resize (width, height, options) {
-  if (is.defined(width)) {
-    if (is.object(width) && !is.defined(options)) {
-      options = width;
-    } else if (is.integer(width) && width > 0) {
-      this.options.width = width;
+function resize (widthOrOptions, height, options) {
+  if (isResizeExpected(this.options)) {
+    this.options.debuglog('ignoring previous resize options');
+  }
+  if (this.options.widthPost !== -1) {
+    this.options.debuglog('operation order will be: extract, resize, extract');
+  }
+  if (is.defined(widthOrOptions)) {
+    if (is.object(widthOrOptions) && !is.defined(options)) {
+      options = widthOrOptions;
+    } else if (is.integer(widthOrOptions) && widthOrOptions > 0) {
+      this.options.width = widthOrOptions;
     } else {
-      throw is.invalidParameterError('width', 'positive integer', width);
+      throw is.invalidParameterError('width', 'positive integer', widthOrOptions);
     }
   } else {
     this.options.width = -1;
@@ -276,16 +324,24 @@ function resize (width, height, options) {
     if (is.defined(options.withoutEnlargement)) {
       this._setBooleanOption('withoutEnlargement', options.withoutEnlargement);
     }
+    // Without reduction
+    if (is.defined(options.withoutReduction)) {
+      this._setBooleanOption('withoutReduction', options.withoutReduction);
+    }
     // Shrink on load
     if (is.defined(options.fastShrinkOnLoad)) {
       this._setBooleanOption('fastShrinkOnLoad', options.fastShrinkOnLoad);
     }
   }
+  if (isRotationExpected(this.options) && isResizeExpected(this.options)) {
+    this.options.rotateBeforePreExtract = true;
+  }
   return this;
 }
 
 /**
- * Extends/pads the edges of the image with the provided background colour.
+ * Extend / pad / extrude one or more edges of the image with either
+ * the provided background colour or pixels derived from the image.
  * This operation will always occur after resizing and extraction, if any.
  *
  * @example
@@ -302,11 +358,30 @@ function resize (width, height, options) {
  *   })
  *   ...
  *
+* @example
+ * // Add a row of 10 red pixels to the bottom
+ * sharp(input)
+ *   .extend({
+ *     bottom: 10,
+ *     background: 'red'
+ *   })
+ *   ...
+ *
+ * @example
+ * // Extrude image by 8 pixels to the right, mirroring existing right hand edge
+ * sharp(input)
+ *   .extend({
+ *     right: 8,
+ *     background: 'mirror'
+ *   })
+ *   ...
+ *
  * @param {(number|Object)} extend - single pixel count to add to all edges or an Object with per-edge counts
- * @param {number} [extend.top]
- * @param {number} [extend.left]
- * @param {number} [extend.bottom]
- * @param {number} [extend.right]
+ * @param {number} [extend.top=0]
+ * @param {number} [extend.left=0]
+ * @param {number} [extend.bottom=0]
+ * @param {number} [extend.right=0]
+ * @param {String} [extend.extendWith='background'] - populate new pixels using this method, one of: background, copy, repeat, mirror.
  * @param {String|Object} [extend.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -317,18 +392,43 @@ function extend (extend) {
     this.options.extendBottom = extend;
     this.options.extendLeft = extend;
     this.options.extendRight = extend;
-  } else if (
-    is.object(extend) &&
-    is.integer(extend.top) && extend.top >= 0 &&
-    is.integer(extend.bottom) && extend.bottom >= 0 &&
-    is.integer(extend.left) && extend.left >= 0 &&
-    is.integer(extend.right) && extend.right >= 0
-  ) {
-    this.options.extendTop = extend.top;
-    this.options.extendBottom = extend.bottom;
-    this.options.extendLeft = extend.left;
-    this.options.extendRight = extend.right;
+  } else if (is.object(extend)) {
+    if (is.defined(extend.top)) {
+      if (is.integer(extend.top) && extend.top >= 0) {
+        this.options.extendTop = extend.top;
+      } else {
+        throw is.invalidParameterError('top', 'positive integer', extend.top);
+      }
+    }
+    if (is.defined(extend.bottom)) {
+      if (is.integer(extend.bottom) && extend.bottom >= 0) {
+        this.options.extendBottom = extend.bottom;
+      } else {
+        throw is.invalidParameterError('bottom', 'positive integer', extend.bottom);
+      }
+    }
+    if (is.defined(extend.left)) {
+      if (is.integer(extend.left) && extend.left >= 0) {
+        this.options.extendLeft = extend.left;
+      } else {
+        throw is.invalidParameterError('left', 'positive integer', extend.left);
+      }
+    }
+    if (is.defined(extend.right)) {
+      if (is.integer(extend.right) && extend.right >= 0) {
+        this.options.extendRight = extend.right;
+      } else {
+        throw is.invalidParameterError('right', 'positive integer', extend.right);
+      }
+    }
     this._setBackgroundColourOption('extendBackground', extend.background);
+    if (is.defined(extend.extendWith)) {
+      if (is.string(extendWith[extend.extendWith])) {
+        this.options.extendWith = extendWith[extend.extendWith];
+      } else {
+        throw is.invalidParameterError('extendWith', 'one of: background, copy, repeat, mirror', extend.extendWith);
+      }
+    }
   } else {
     throw is.invalidParameterError('extend', 'integer or object', extend);
   }
@@ -340,7 +440,7 @@ function extend (extend) {
  *
  * - Use `extract` before `resize` for pre-resize extraction.
  * - Use `extract` after `resize` for post-resize extraction.
- * - Use `extract` before and after for both.
+ * - Use `extract` twice and `resize` once for extract-then-resize-then-extract in a fixed operation order.
  *
  * @example
  * sharp(input)
@@ -366,7 +466,10 @@ function extend (extend) {
  * @throws {Error} Invalid parameters
  */
 function extract (options) {
-  const suffix = this.options.width === -1 && this.options.height === -1 ? 'Pre' : 'Post';
+  const suffix = isResizeExpected(this.options) || this.options.widthPre !== -1 ? 'Post' : 'Pre';
+  if (this.options[`width${suffix}`] !== -1) {
+    this.options.debuglog('ignoring previous extract options');
+  }
   ['left', 'top', 'width', 'height'].forEach(function (name) {
     const value = options[name];
     if (is.integer(value) && value >= 0) {
@@ -376,32 +479,87 @@ function extract (options) {
     }
   }, this);
   // Ensure existing rotation occurs before pre-resize extraction
-  if (suffix === 'Pre' && isRotationExpected(this.options)) {
-    this.options.rotateBeforePreExtract = true;
+  if (isRotationExpected(this.options) && !isResizeExpected(this.options)) {
+    if (this.options.widthPre === -1 || this.options.widthPost === -1) {
+      this.options.rotateBeforePreExtract = true;
+    }
   }
   return this;
 }
 
 /**
- * Trim "boring" pixels from all edges that contain values similar to the top-left pixel.
- * Images consisting entirely of a single colour will calculate "boring" using the alpha channel, if any.
+ * Trim pixels from all edges that contain values similar to the given background colour, which defaults to that of the top-left pixel.
+ *
+ * Images with an alpha channel will use the combined bounding box of alpha and non-alpha channels.
+ *
+ * If the result of this operation would trim an image to nothing then no change is made.
  *
  * The `info` response Object, obtained from callback of `.toFile()` or `.toBuffer()`,
  * will contain `trimOffsetLeft` and `trimOffsetTop` properties.
  *
- * @param {number} [threshold=10] the allowed difference from the top-left pixel, a number greater than zero.
+ * @example
+ * // Trim pixels with a colour similar to that of the top-left pixel.
+ * sharp(input)
+ *   .trim()
+ *   .toFile(output, function(err, info) {
+ *     ...
+ *   });
+ * @example
+ * // Trim pixels with the exact same colour as that of the top-left pixel.
+ * sharp(input)
+ *   .trim(0)
+ *   .toFile(output, function(err, info) {
+ *     ...
+ *   });
+ * @example
+ * // Trim only pixels with a similar colour to red.
+ * sharp(input)
+ *   .trim("#FF0000")
+ *   .toFile(output, function(err, info) {
+ *     ...
+ *   });
+ * @example
+ * // Trim all "yellow-ish" pixels, being more lenient with the higher threshold.
+ * sharp(input)
+ *   .trim({
+ *     background: "yellow",
+ *     threshold: 42,
+ *   })
+ *   .toFile(output, function(err, info) {
+ *     ...
+ *   });
+ *
+ * @param {string|number|Object} trim - the specific background colour to trim, the threshold for doing so or an Object with both.
+ * @param {string|Object} [trim.background='top-left pixel'] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to that of the top-left pixel.
+ * @param {number} [trim.threshold=10] - the allowed difference from the above colour, a positive number.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-function trim (threshold) {
-  if (!is.defined(threshold)) {
+function trim (trim) {
+  if (!is.defined(trim)) {
     this.options.trimThreshold = 10;
-  } else if (is.number(threshold) && threshold > 0) {
-    this.options.trimThreshold = threshold;
+  } else if (is.string(trim)) {
+    this._setBackgroundColourOption('trimBackground', trim);
+    this.options.trimThreshold = 10;
+  } else if (is.number(trim)) {
+    if (trim >= 0) {
+      this.options.trimThreshold = trim;
+    } else {
+      throw is.invalidParameterError('threshold', 'positive number', trim);
+    }
+  } else if (is.object(trim)) {
+    this._setBackgroundColourOption('trimBackground', trim.background);
+    if (!is.defined(trim.threshold)) {
+      this.options.trimThreshold = 10;
+    } else if (is.number(trim.threshold) && trim.threshold >= 0) {
+      this.options.trimThreshold = trim.threshold;
+    } else {
+      throw is.invalidParameterError('threshold', 'positive number', trim);
+    }
   } else {
-    throw is.invalidParameterError('threshold', 'number greater than zero', threshold);
+    throw is.invalidParameterError('trim', 'string, number or object', trim);
   }
-  if (this.options.trimThreshold && isRotationExpected(this.options)) {
+  if (isRotationExpected(this.options)) {
     this.options.rotateBeforePreExtract = true;
   }
   return this;

lib/sharp.js

@@ -0,0 +1,60 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+// Inspects the runtime environment and exports the relevant sharp.node binary
+
+const { familySync, versionSync } = require('detect-libc');
+
+const { runtimePlatformArch, prebuiltPlatforms, minimumLibvipsVersion } = require('./libvips');
+const runtimePlatform = runtimePlatformArch();
+
+/* istanbul ignore next */
+try {
+  // Check for local build
+  module.exports = require(`../build/Release/sharp-${runtimePlatform}.node`);
+} catch (errLocal) {
+  try {
+    // Check for runtime package
+    module.exports = require(`@sharpen/sharp-${runtimePlatform}/sharp.node`);
+  } catch (errPackage) {
+    const help = ['Could not load the "sharp" module at runtime'];
+    if (errLocal.code !== 'MODULE_NOT_FOUND') {
+      help.push(`${errLocal.code}: ${errLocal.message}`);
+    }
+    if (errPackage.code !== 'MODULE_NOT_FOUND') {
+      help.push(`${errPackage.code}: ${errPackage.message}`);
+    }
+    help.push('Possible solutions:');
+    // Common error messages
+    if (prebuiltPlatforms.includes(runtimePlatform)) {
+      help.push(`- Add an explicit dependency for the runtime platform: "npm install --force @sharpen/sharp-${runtimePlatform}"`);
+    } else {
+      help.push(`- The ${runtimePlatform} platform requires manual installation of libvips >= ${minimumLibvipsVersion}`);
+    }
+    if (runtimePlatform.startsWith('linux') && /symbol not found/i.test(errPackage)) {
+      try {
+        const { engines } = require(`@sharpen/sharp-libvips-${runtimePlatform}/package`);
+        const libcFound = `${familySync()} ${versionSync()}`;
+        const libcRequires = `${engines.musl ? 'musl' : 'glibc'} ${engines.musl || engines.glibc}`;
+        help.push(`- Update your OS: found ${libcFound}, requires ${libcRequires}`);
+      } catch (errEngines) {}
+    }
+    if (runtimePlatform.startsWith('darwin') && /Incompatible library version/.test(errLocal.message)) {
+      help.push('- Update Homebrew: "brew update && brew upgrade vips"');
+    }
+    if (errPackage.code === 'ERR_DLOPEN_DISABLED') {
+      help.push('- Run Node.js without using the --no-addons flag');
+    }
+    // Link to installation docs
+    if (runtimePlatform.startsWith('linux') && /Module did not self-register/.test(errLocal.message + errPackage.message)) {
+      help.push('- Using worker threads on Linux? See https://sharp.pixelplumbing.com/install#worker-threads');
+    } else if (runtimePlatform.startsWith('win32') && /The specified procedure could not be found/.test(errPackage.message)) {
+      help.push('- Using the canvas package on Windows? See https://sharp.pixelplumbing.com/install#canvas-and-windows');
+    } else {
+      help.push('- Consult the installation documentation: https://sharp.pixelplumbing.com/install');
+    }
+    throw new Error(help.join('\n'));
+  }
+}

lib/utility.js

@@ -1,8 +1,14 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
-const events = require('events');
+const events = require('node:events');
+const detectLibc = require('detect-libc');
+
 const is = require('./is');
-const sharp = require('../build/Release/sharp.node');
+const { runtimePlatformArch } = require('./libvips');
+const sharp = require('./sharp');
 
 /**
  * An Object containing nested boolean values representing the available input and output formats/methods.
@@ -12,6 +18,10 @@ const sharp = require('../build/Release/sharp.node');
  * @returns {Object}
  */
 const format = sharp.format();
+format.heif.output.alias = ['avif', 'heic'];
+format.jpeg.output.alias = ['jpe', 'jpg'];
+format.tiff.output.alias = ['tif'];
+format.jp2k.output.alias = ['j2c', 'j2k', 'jp2', 'jpx'];
 
 /**
  * An Object containing the available interpolators and their proper values
@@ -25,16 +35,16 @@ const interpolators = {
   bilinear: 'bilinear',
   /** [Bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation) (the default). */
   bicubic: 'bicubic',
-  /** [LBB interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/lbb.cpp#L100). Prevents some "[acutance](http://en.wikipedia.org/wiki/Acutance)" but typically reduces performance by a factor of 2. */
+  /** [LBB interpolation](https://github.com/libvips/libvips/blob/master/libvips/resample/lbb.cpp#L100). Prevents some "[acutance](http://en.wikipedia.org/wiki/Acutance)" but typically reduces performance by a factor of 2. */
   locallyBoundedBicubic: 'lbb',
   /** [Nohalo interpolation](http://eprints.soton.ac.uk/268086/). Prevents acutance but typically reduces performance by a factor of 3. */
   nohalo: 'nohalo',
-  /** [VSQBS interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/vsqbs.cpp#L48). Prevents "staircasing" when enlarging. */
+  /** [VSQBS interpolation](https://github.com/libvips/libvips/blob/master/libvips/resample/vsqbs.cpp#L48). Prevents "staircasing" when enlarging. */
   vertexSplitQuadraticBasisSpline: 'vsqbs'
 };
 
 /**
- * An Object containing the version numbers of libvips and its dependencies.
+ * An Object containing the version numbers of sharp, libvips and its dependencies.
  * @member
  * @example
  * console.log(sharp.versions);
@@ -43,8 +53,13 @@ let versions = {
   vips: sharp.libvipsVersion()
 };
 try {
-  versions = require(`../vendor/${versions.vips}/versions.json`);
-} catch (err) {}
+  versions = require(`@sharpen/sharp-${runtimePlatformArch()}/versions`);
+} catch (_) {
+  try {
+    versions = require(`@sharpen/sharp-libvips-${runtimePlatformArch()}/versions`);
+  } catch (_) {}
+}
+versions.sharp = require('../package.json').version;
 
 /**
  * Gets or, when options are provided, sets the limits of _libvips'_ operation cache.
@@ -83,15 +98,32 @@ cache(true);
 
 /**
  * Gets or, when a concurrency is provided, sets
- * the number of threads _libvips'_ should create to process each image.
- * The default value is the number of CPU cores.
- * A value of `0` will reset to this default.
- *
- * The maximum number of images that can be processed in parallel
- * is limited by libuv's `UV_THREADPOOL_SIZE` environment variable.
+ * the maximum number of threads _libvips_ should use to process _each image_.
+ * These are from a thread pool managed by glib,
+ * which helps avoid the overhead of creating new threads.
  *
  * This method always returns the current concurrency.
  *
+ * The default value is the number of CPU cores,
+ * except when using glibc-based Linux without jemalloc,
+ * where the default is `1` to help reduce memory fragmentation.
+ *
+ * A value of `0` will reset this to the number of CPU cores.
+ *
+ * Some image format libraries spawn additional threads,
+ * e.g. libaom manages its own 4 threads when encoding AVIF images,
+ * and these are independent of the value set here.
+ *
+ * The maximum number of images that sharp can process in parallel
+ * is controlled by libuv's `UV_THREADPOOL_SIZE` environment variable,
+ * which defaults to 4.
+ *
+ * https://nodejs.org/api/cli.html#uv_threadpool_sizesize
+ *
+ * For example, by default, a machine with 8 CPU cores will process
+ * 4 images in parallel and use up to 8 threads per image,
+ * so there will be up to 32 concurrent threads.
+ *
  * @example
  * const threads = sharp.concurrency(); // 4
  * sharp.concurrency(2); // 2
@@ -103,6 +135,11 @@ cache(true);
 function concurrency (concurrency) {
   return sharp.concurrency(is.integer(concurrency) ? concurrency : null);
 }
+/* istanbul ignore next */
+if (detectLibc.familySync() === detectLibc.GLIBC && !sharp._isUsingJemalloc()) {
+  // Reduce default concurrency to 1 when using glibc memory allocator
+  sharp.concurrency(1);
+}
 
 /**
  * An EventEmitter that emits a `change` event when a task is either:
@@ -152,21 +189,85 @@ function simd (simd) {
 }
 simd(true);
 
+/**
+ * Block libvips operations at runtime.
+ *
+ * This is in addition to the `VIPS_BLOCK_UNTRUSTED` environment variable,
+ * which when set will block all "untrusted" operations.
+ *
+ * @since 0.32.4
+ *
+ * @example <caption>Block all TIFF input.</caption>
+ * sharp.block({
+ *   operation: ['VipsForeignLoadTiff']
+ * });
+ *
+ * @param {Object} options
+ * @param {Array<string>} options.operation - List of libvips low-level operation names to block.
+ */
+function block (options) {
+  if (is.object(options)) {
+    if (Array.isArray(options.operation) && options.operation.every(is.string)) {
+      sharp.block(options.operation, true);
+    } else {
+      throw is.invalidParameterError('operation', 'Array<string>', options.operation);
+    }
+  } else {
+    throw is.invalidParameterError('options', 'object', options);
+  }
+}
+
+/**
+ * Unblock libvips operations at runtime.
+ *
+ * This is useful for defining a list of allowed operations.
+ *
+ * @since 0.32.4
+ *
+ * @example <caption>Block all input except WebP from the filesystem.</caption>
+ * sharp.block({
+ *   operation: ['VipsForeignLoad']
+ * });
+ * sharp.unblock({
+ *   operation: ['VipsForeignLoadWebpFile']
+ * });
+ *
+ * @example <caption>Block all input except JPEG and PNG from a Buffer or Stream.</caption>
+ * sharp.block({
+ *   operation: ['VipsForeignLoad']
+ * });
+ * sharp.unblock({
+ *   operation: ['VipsForeignLoadJpegBuffer', 'VipsForeignLoadPngBuffer']
+ * });
+ *
+ * @param {Object} options
+ * @param {Array<string>} options.operation - List of libvips low-level operation names to unblock.
+ */
+function unblock (options) {
+  if (is.object(options)) {
+    if (Array.isArray(options.operation) && options.operation.every(is.string)) {
+      sharp.block(options.operation, false);
+    } else {
+      throw is.invalidParameterError('operation', 'Array<string>', options.operation);
+    }
+  } else {
+    throw is.invalidParameterError('options', 'object', options);
+  }
+}
+
 /**
  * Decorate the Sharp class with utility-related functions.
  * @private
  */
 module.exports = function (Sharp) {
-  [
-    cache,
-    concurrency,
-    counters,
-    simd
-  ].forEach(function (f) {
-    Sharp[f.name] = f;
-  });
+  Sharp.cache = cache;
+  Sharp.concurrency = concurrency;
+  Sharp.counters = counters;
+  Sharp.simd = simd;
   Sharp.format = format;
   Sharp.interpolators = interpolators;
   Sharp.versions = versions;
   Sharp.queue = queue;
+  Sharp.block = block;
+  Sharp.unblock = unblock;
 };

npm/darwin-arm64/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "@sharpen/sharp-darwin-arm64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with macOS ARM64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/darwin-arm64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-darwin-arm64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-darwin-arm64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "glibc": ">=2.26"
+  },
+  "os": [
+    "darwin"
+  ],
+  "cpu": [
+    "arm64"
+  ]
+}

npm/darwin-x64/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "@sharpen/sharp-darwin-x64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with macOS x64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/darwin-x64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-darwin-x64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-darwin-x64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "glibc": ">=2.26"
+  },
+  "os": [
+    "darwin"
+  ],
+  "cpu": [
+    "x64"
+  ]
+}

npm/from-github-release.js

@@ -0,0 +1,70 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+// Populate contents of all packages with the current GitHub release
+
+const { writeFile, copyFile, rm } = require('node:fs/promises');
+const path = require('node:path');
+const { Readable } = require('node:stream');
+const { pipeline } = require('node:stream/promises');
+const { createGunzip } = require('node:zlib');
+const { extract } = require('tar-fs');
+
+const { workspaces } = require('./package.json');
+const { version } = require('../package.json');
+
+const mapTarballEntry = (header) => {
+  header.name = path.basename(header.name);
+  return header;
+};
+
+const licensing = `
+## Licensing
+
+Copyright 2013 Lovell Fuller and others.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+[https://www.apache.org/licenses/LICENSE-2.0](https://www.apache.org/licenses/LICENSE-2.0)
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+`;
+
+workspaces.map(async platform => {
+  const url = `https://github.com/lovell/sharp/releases/download/v${version}/sharp-v${version}-napi-v9-${platform}.tar.gz`;
+  const dir = path.join(__dirname, platform);
+  const response = await fetch(url);
+  if (!response.ok) {
+    console.log(`Skipping ${platform}: ${response.statusText}`);
+    return;
+  }
+  // Extract prebuild tarball
+  const lib = path.join(dir, 'lib');
+  await rm(lib, { recursive: true });
+  await pipeline(
+    Readable.fromWeb(response.body),
+    createGunzip(),
+    extract(lib, { map: mapTarballEntry })
+  );
+  // Generate README
+  const { name, description } = require(`./${platform}/package.json`);
+  await writeFile(path.join(dir, 'README.md'), `# \`${name}\`\n\n${description}.\n${licensing}`);
+  // Copy Apache-2.0 LICENSE
+  await copyFile(path.join(__dirname, '..', 'LICENSE'), path.join(dir, 'LICENSE'));
+  // Copy Windows-specific files
+  if (platform.startsWith('win32-')) {
+    const sharpLibvipsDir = path.join(require(`@sharpen/sharp-libvips-${platform}/lib`), '..');
+    await Promise.all(
+      ['versions.json', 'THIRD-PARTY-NOTICES.md'].map(
+        filename => copyFile(path.join(sharpLibvipsDir, filename), path.join(dir, filename))
+      )
+    );
+  }
+});

npm/from-local-build.js

@@ -0,0 +1,26 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+// Populate contents of a single npm/sharpen-sharp-<build-platform> package
+// with the local/CI build directory for local/CI prebuild testing
+
+const fs = require('node:fs');
+const path = require('node:path');
+
+const { buildPlatformArch } = require('../lib/libvips');
+const platform = buildPlatformArch();
+const dest = path.join(__dirname, platform);
+
+// Use same config as prebuild to copy binary files
+const release = path.join(__dirname, '..', 'build', 'Release');
+const prebuildrc = JSON.parse(fs.readFileSync(path.join(__dirname, '..', '.prebuildrc'), 'utf8'));
+const include = new RegExp(prebuildrc['include-regex'], 'i');
+fs.cpSync(release, path.join(dest, 'lib'), {
+  recursive: true,
+  filter: (file) => {
+    const name = path.basename(file);
+    return name === 'Release' || include.test(name);
+  }
+});

npm/linux-arm/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@sharpen/sharp-linux-arm",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Linux (glibc) ARM (32-bit)",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/linux-arm"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-linux-arm": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-linux-arm.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "glibc": ">=2.28"
+  },
+  "os": [
+    "linux"
+  ],
+  "libc": [
+    "glibc"
+  ],
+  "cpu": [
+    "arm"
+  ]
+}

npm/linux-arm64/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@sharpen/sharp-linux-arm64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Linux (glibc) ARM64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/linux-arm64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-linux-arm64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-linux-arm64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "glibc": ">=2.26"
+  },
+  "os": [
+    "linux"
+  ],
+  "libc": [
+    "glibc"
+  ],
+  "cpu": [
+    "arm64"
+  ]
+}

npm/linux-x64/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@sharpen/sharp-linux-x64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Linux (glibc) x64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/linux-x64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-linux-x64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-linux-x64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "glibc": ">=2.26"
+  },
+  "os": [
+    "linux"
+  ],
+  "libc": [
+    "glibc"
+  ],
+  "cpu": [
+    "x64"
+  ]
+}

npm/linuxmusl-arm64/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@sharpen/sharp-linuxmusl-arm64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Linux (musl) ARM64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/linuxmusl-arm64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-linuxmusl-arm64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-linuxmusl-arm64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "musl": ">=1.2.2"
+  },
+  "os": [
+    "linux"
+  ],
+  "libc": [
+    "musl"
+  ],
+  "cpu": [
+    "arm64"
+  ]
+}

npm/linuxmusl-x64/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@sharpen/sharp-linuxmusl-x64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Linux (musl) x64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/linuxmusl-x64"
+  },
+  "license": "Apache-2.0",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "optionalDependencies": {
+    "@sharpen/sharp-libvips-linuxmusl-x64": "0.0.1-alpha.1"
+  },
+  "files": [
+    "lib"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-linuxmusl-x64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0",
+    "musl": ">=1.2.2"
+  },
+  "os": [
+    "linux"
+  ],
+  "libc": [
+    "musl"
+  ],
+  "cpu": [
+    "x64"
+  ]
+}

npm/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "@sharpen/sharp",
+  "version": "0.0.1-alpha.1",
+  "private": "true",
+  "workspaces": [
+    "darwin-x64",
+    "darwin-arm64",
+    "linux-arm",
+    "linux-arm64",
+    "linuxmusl-arm64",
+    "linuxmusl-x64",
+    "linux-x64",
+    "win32-ia32",
+    "win32-x64"
+  ]
+}

npm/win32-ia32/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "@sharpen/sharp-win32-ia32",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Windows x86 (32-bit)",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/win32-ia32"
+  },
+  "license": "Apache-2.0 AND LGPL-3.0-or-later",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "files": [
+    "lib",
+    "versions.json",
+    "THIRD-PARTY-NOTICES.md"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-win32-ia32.node",
+    "./package": "./package.json",
+    "./versions": "./versions.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0"
+  },
+  "os": [
+    "win32"
+  ],
+  "cpu": [
+    "ia32"
+  ]
+}

npm/win32-x64/package.json

@@ -0,0 +1,41 @@
+{
+  "name": "@sharpen/sharp-win32-x64",
+  "version": "0.0.1-alpha.4",
+  "description": "Prebuilt sharp for use with Windows x64",
+  "homepage": "https://sharp.pixelplumbing.com",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lovell/sharp.git",
+    "directory": "npm/win32-x64"
+  },
+  "license": "Apache-2.0 AND LGPL-3.0-or-later",
+  "funding": {
+    "url": "https://opencollective.com/libvips"
+  },
+  "preferUnplugged": true,
+  "files": [
+    "lib",
+    "versions.json",
+    "THIRD-PARTY-NOTICES.md"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "commonjs",
+  "exports": {
+    "./sharp.node": "./lib/sharp-win32-x64.node",
+    "./package": "./package.json"
+  },
+  "engines": {
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "npm": ">=9.6.5",
+    "yarn": ">=3.2.0",
+    "pnpm": ">=7.1.0"
+  },
+  "os": [
+    "win32"
+  ],
+  "cpu": [
+    "x64"
+  ]
+}

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sharp",
-  "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images",
-  "version": "0.26.3",
+  "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, GIF, AVIF and TIFF images",
+  "version": "0.33.0-alpha.4",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://github.com/lovell/sharp",
   "contributors": [
@@ -70,39 +70,61 @@
     "Roman Malieiev <aromaleev@gmail.com>",
     "Tomas Szabo <tomas.szabo@deftomat.com>",
     "Robert O'Rourke <robert@o-rourke.org>",
-    "Guillermo Alfonso Varela Chouciño <guillevch@gmail.com>"
+    "Guillermo Alfonso Varela Chouciño <guillevch@gmail.com>",
+    "Christian Flintrup <chr@gigahost.dk>",
+    "Manan Jadhav <manan@motionden.com>",
+    "Leon Radley <leon@radley.se>",
+    "alza54 <alza54@thiocod.in>",
+    "Jacob Smith <jacob@frende.me>",
+    "Michael Nutt <michael@nutt.im>",
+    "Brad Parham <baparham@gmail.com>",
+    "Taneli Vatanen <taneli.vatanen@gmail.com>",
+    "Joris Dugué <zaruike10@gmail.com>",
+    "Chris Banks <christopher.bradley.banks@gmail.com>",
+    "Ompal Singh <ompal.hitm09@gmail.com>",
+    "Brodan <christopher.hranj@gmail.com",
+    "Ankur Parihar <ankur.github@gmail.com>",
+    "Brahim Ait elhaj <brahima@gmail.com>",
+    "Mart Jansink <m.jansink@gmail.com>",
+    "Lachlan Newman <lachnewman007@gmail.com>"
   ],
   "scripts": {
-    "install": "(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)",
-    "clean": "rm -rf node_modules/ build/ vendor/ .nyc_output/ coverage/ test/fixtures/output.*",
-    "test": "semistandard && cpplint && npm run test-unit && npm run test-licensing && node install/prebuild-ci",
-    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=5000 --timeout=60000 ./test/unit/*.js",
-    "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;MIT\"",
-    "test-coverage": "./test/coverage/report.sh",
+    "install": "node install/check",
+    "clean": "rm -rf build/ .nyc_output/ coverage/ test/fixtures/output.*",
+    "test": "npm run test-lint && npm run test-unit && npm run test-licensing && npm run test-types",
+    "test-lint": "semistandard && cpplint",
+    "test-unit": "nyc --reporter=lcov --reporter=text --check-coverage --branches=100 mocha",
+    "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;LGPL-3.0-or-later;MIT\"",
     "test-leak": "./test/leak/leak.sh",
-    "docs-build": "documentation lint lib && for m in constructor input resize composite operation colour channel output utility; do documentation build --shallow --format=md --markdown-toc=false lib/$m.js >docs/api-$m.md; done && node docs/search-index/build",
+    "test-types": "tsd",
+    "package-from-local-build": "node npm/from-local-build",
+    "package-from-github-release": "node npm/from-github-release",
+    "docs-build": "node docs/build && node docs/search-index/build",
     "docs-serve": "cd docs && npx serve",
     "docs-publish": "cd docs && npx firebase-tools deploy --project pixelplumbing --only hosting:pixelplumbing-sharp"
   },
+  "type": "commonjs",
   "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "files": [
     "binding.gyp",
-    "install/**",
-    "!install/prebuild-ci.js",
-    "lib/**",
-    "src/**"
+    "install",
+    "lib",
+    "src"
   ],
   "repository": {
     "type": "git",
-    "url": "git://github.com/lovell/sharp"
+    "url": "git://github.com/lovell/sharp.git"
   },
   "keywords": [
     "jpeg",
     "png",
     "webp",
+    "avif",
     "tiff",
     "gif",
     "svg",
+    "jp2",
     "dzi",
     "image",
     "resize",
@@ -113,47 +135,59 @@
     "vips"
   ],
   "dependencies": {
-    "array-flatten": "^3.0.0",
-    "color": "^3.1.3",
-    "detect-libc": "^1.0.3",
-    "node-addon-api": "^3.0.2",
-    "npmlog": "^4.1.2",
-    "prebuild-install": "^6.0.0",
-    "semver": "^7.3.2",
-    "simple-get": "^4.0.0",
-    "tar-fs": "^2.1.1",
-    "tunnel-agent": "^0.6.0"
+    "color": "^4.2.3",
+    "detect-libc": "^2.0.2",
+    "node-addon-api": "^7.0.0",
+    "semver": "^7.5.4"
+  },
+  "optionalDependencies": {
+    "@sharpen/sharp-darwin-arm64": "0.0.1-alpha.4",
+    "@sharpen/sharp-darwin-x64": "0.0.1-alpha.4",
+    "@sharpen/sharp-libvips-darwin-arm64": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-darwin-x64": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-linux-arm": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-linux-arm64": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-linux-x64": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-linuxmusl-arm64": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-linuxmusl-x64": "0.0.1-alpha.2",
+    "@sharpen/sharp-linux-arm": "0.0.1-alpha.4",
+    "@sharpen/sharp-linux-arm64": "0.0.1-alpha.4",
+    "@sharpen/sharp-linux-x64": "0.0.1-alpha.4",
+    "@sharpen/sharp-linuxmusl-arm64": "0.0.1-alpha.4",
+    "@sharpen/sharp-linuxmusl-x64": "0.0.1-alpha.4",
+    "@sharpen/sharp-win32-ia32": "0.0.1-alpha.4",
+    "@sharpen/sharp-win32-x64": "0.0.1-alpha.4"
   },
   "devDependencies": {
-    "async": "^3.2.0",
-    "cc": "^2.0.1",
-    "decompress-zip": "^0.3.2",
-    "documentation": "^13.1.0",
-    "exif-reader": "^1.0.3",
-    "icc": "^2.0.0",
+    "@sharpen/sharp-libvips-dev": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-win32-ia32": "0.0.1-alpha.2",
+    "@sharpen/sharp-libvips-win32-x64": "0.0.1-alpha.2",
+    "@types/node": "*",
+    "async": "^3.2.4",
+    "cc": "^3.0.1",
+    "exif-reader": "^2.0.0",
+    "extract-zip": "^2.0.1",
+    "icc": "^3.0.0",
+    "jsdoc-to-markdown": "^8.0.0",
     "license-checker": "^25.0.1",
-    "mocha": "^8.2.1",
-    "mock-fs": "^4.13.0",
+    "mocha": "^10.2.0",
     "nyc": "^15.1.0",
-    "prebuild": "^10.0.1",
-    "rimraf": "^3.0.2",
-    "semistandard": "^16.0.0"
+    "prebuild": "^12.1.0",
+    "semistandard": "^17.0.0",
+    "tar-fs": "^3.0.4",
+    "tsd": "^0.29.0"
   },
   "license": "Apache-2.0",
-  "config": {
-    "libvips": "8.10.0",
-    "runtime": "napi",
-    "target": 3
-  },
   "engines": {
-    "node": ">=10"
+    "node": "^18.17.0 || ^20.3.0 || >=21.0.0",
+    "libvips": ">=8.14.5"
   },
   "funding": {
     "url": "https://opencollective.com/libvips"
   },
   "binary": {
     "napi_versions": [
-      3
+      9
     ]
   },
   "semistandard": {
@@ -166,5 +200,8 @@
     "filter": [
       "build/include"
     ]
+  },
+  "tsd": {
+    "directory": "test/types/"
   }
 }

src/common.cc

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #include <cstdlib>
 #include <string>
@@ -36,6 +25,9 @@ namespace sharp {
   std::string AttrAsStr(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::String>();
   }
+  std::string AttrAsStr(Napi::Object obj, unsigned int const attr) {
+    return obj.Get(attr).As<Napi::String>();
+  }
   uint32_t AttrAsUint32(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Number>().Uint32Value();
   }
@@ -45,6 +37,9 @@ namespace sharp {
   int32_t AttrAsInt32(Napi::Object obj, unsigned int const attr) {
     return obj.Get(attr).As<Napi::Number>().Int32Value();
   }
+  int64_t AttrAsInt64(Napi::Object obj, std::string attr) {
+    return obj.Get(attr).As<Napi::Number>().Int64Value();
+  }
   double AttrAsDouble(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Number>().DoubleValue();
   }
@@ -82,16 +77,22 @@ namespace sharp {
       descriptor->buffer = buffer.Data();
       descriptor->isBuffer = TRUE;
     }
-    descriptor->failOnError = AttrAsBool(input, "failOnError");
+    descriptor->failOn = AttrAsEnum<VipsFailOn>(input, "failOn", VIPS_TYPE_FAIL_ON);
     // Density for vector-based input
     if (HasAttr(input, "density")) {
       descriptor->density = AttrAsDouble(input, "density");
     }
+    // Should we ignore any embedded ICC profile
+    if (HasAttr(input, "ignoreIcc")) {
+      descriptor->ignoreIcc = AttrAsBool(input, "ignoreIcc");
+    }
     // Raw pixel input
     if (HasAttr(input, "rawChannels")) {
+      descriptor->rawDepth = AttrAsEnum<VipsBandFormat>(input, "rawDepth", VIPS_TYPE_BAND_FORMAT);
       descriptor->rawChannels = AttrAsUint32(input, "rawChannels");
       descriptor->rawWidth = AttrAsUint32(input, "rawWidth");
       descriptor->rawHeight = AttrAsUint32(input, "rawHeight");
+      descriptor->rawPremultiplied = AttrAsBool(input, "rawPremultiplied");
     }
     // Multi-page input (GIF, TIFF, PDF)
     if (HasAttr(input, "pages")) {
@@ -104,25 +105,71 @@ namespace sharp {
     if (HasAttr(input, "level")) {
       descriptor->level = AttrAsUint32(input, "level");
     }
+    // subIFD (OME-TIFF)
+    if (HasAttr(input, "subifd")) {
+      descriptor->subifd = AttrAsInt32(input, "subifd");
+    }
     // Create new image
     if (HasAttr(input, "createChannels")) {
       descriptor->createChannels = AttrAsUint32(input, "createChannels");
       descriptor->createWidth = AttrAsUint32(input, "createWidth");
       descriptor->createHeight = AttrAsUint32(input, "createHeight");
-      descriptor->createBackground = AttrAsVectorOfDouble(input, "createBackground");
+      if (HasAttr(input, "createNoiseType")) {
+        descriptor->createNoiseType = AttrAsStr(input, "createNoiseType");
+        descriptor->createNoiseMean = AttrAsDouble(input, "createNoiseMean");
+        descriptor->createNoiseSigma = AttrAsDouble(input, "createNoiseSigma");
+      } else {
+        descriptor->createBackground = AttrAsVectorOfDouble(input, "createBackground");
+      }
+    }
+    // Create new image with text
+    if (HasAttr(input, "textValue")) {
+      descriptor->textValue = AttrAsStr(input, "textValue");
+      if (HasAttr(input, "textFont")) {
+        descriptor->textFont = AttrAsStr(input, "textFont");
+      }
+      if (HasAttr(input, "textFontfile")) {
+        descriptor->textFontfile = AttrAsStr(input, "textFontfile");
+      }
+      if (HasAttr(input, "textWidth")) {
+        descriptor->textWidth = AttrAsUint32(input, "textWidth");
+      }
+      if (HasAttr(input, "textHeight")) {
+        descriptor->textHeight = AttrAsUint32(input, "textHeight");
+      }
+      if (HasAttr(input, "textAlign")) {
+        descriptor->textAlign = AttrAsEnum<VipsAlign>(input, "textAlign", VIPS_TYPE_ALIGN);
+      }
+      if (HasAttr(input, "textJustify")) {
+        descriptor->textJustify = AttrAsBool(input, "textJustify");
+      }
+      if (HasAttr(input, "textDpi")) {
+        descriptor->textDpi = AttrAsUint32(input, "textDpi");
+      }
+      if (HasAttr(input, "textRgba")) {
+        descriptor->textRgba = AttrAsBool(input, "textRgba");
+      }
+      if (HasAttr(input, "textSpacing")) {
+        descriptor->textSpacing = AttrAsUint32(input, "textSpacing");
+      }
+      if (HasAttr(input, "textWrap")) {
+        descriptor->textWrap = AttrAsEnum<VipsTextWrap>(input, "textWrap", VIPS_TYPE_TEXT_WRAP);
+      }
     }
     // Limit input images to a given number of pixels, where pixels = width * height
-    descriptor->limitInputPixels = AttrAsUint32(input, "limitInputPixels");
+    descriptor->limitInputPixels = static_cast<uint64_t>(AttrAsInt64(input, "limitInputPixels"));
     // Allow switch from random to sequential access
     descriptor->access = AttrAsBool(input, "sequentialRead") ? VIPS_ACCESS_SEQUENTIAL : VIPS_ACCESS_RANDOM;
+    // Remove safety features and allow unlimited input
+    descriptor->unlimited = AttrAsBool(input, "unlimited");
     return descriptor;
   }
 
   // How many tasks are in the queue?
-  volatile int counterQueue = 0;
+  std::atomic<int> counterQueue{0};
 
   // How many tasks are being processed?
-  volatile int counterProcess = 0;
+  std::atomic<int> counterProcess{0};
 
   // Filename extension checkers
   static bool EndsWith(std::string const &str, std::string const &end) {
@@ -140,6 +187,10 @@ namespace sharp {
   bool IsGif(std::string const &str) {
     return EndsWith(str, ".gif") || EndsWith(str, ".GIF");
   }
+  bool IsJp2(std::string const &str) {
+    return EndsWith(str, ".jp2") || EndsWith(str, ".jpx") || EndsWith(str, ".j2k") || EndsWith(str, ".j2c")
+      || EndsWith(str, ".JP2") || EndsWith(str, ".JPX") || EndsWith(str, ".J2K") || EndsWith(str, ".J2C");
+  }
   bool IsTiff(std::string const &str) {
     return EndsWith(str, ".tif") || EndsWith(str, ".tiff") || EndsWith(str, ".TIF") || EndsWith(str, ".TIFF");
   }
@@ -152,6 +203,9 @@ namespace sharp {
   bool IsAvif(std::string const &str) {
     return EndsWith(str, ".avif") || EndsWith(str, ".AVIF");
   }
+  bool IsJxl(std::string const &str) {
+    return EndsWith(str, ".jxl") || EndsWith(str, ".JXL");
+  }
   bool IsDz(std::string const &str) {
     return EndsWith(str, ".dzi") || EndsWith(str, ".DZI");
   }
@@ -162,6 +216,13 @@ namespace sharp {
     return EndsWith(str, ".v") || EndsWith(str, ".V") || EndsWith(str, ".vips") || EndsWith(str, ".VIPS");
   }
 
+  /*
+    Trim space from end of string.
+  */
+  std::string TrimEnd(std::string const &str) {
+    return str.substr(0, str.find_last_not_of(" \n\r\f") + 1);
+  }
+
   /*
     Provide a string identifier for the given image type.
   */
@@ -173,6 +234,7 @@ namespace sharp {
       case ImageType::WEBP: id = "webp"; break;
       case ImageType::TIFF: id = "tiff"; break;
       case ImageType::GIF: id = "gif"; break;
+      case ImageType::JP2: id = "jp2"; break;
       case ImageType::SVG: id = "svg"; break;
       case ImageType::HEIF: id = "heif"; break;
       case ImageType::PDF: id = "pdf"; break;
@@ -181,6 +243,7 @@ namespace sharp {
       case ImageType::PPM: id = "ppm"; break;
       case ImageType::FITS: id = "fits"; break;
       case ImageType::EXR: id = "exr"; break;
+      case ImageType::JXL: id = "jxl"; break;
       case ImageType::VIPS: id = "vips"; break;
       case ImageType::RAW: id = "raw"; break;
       case ImageType::UNKNOWN: id = "unknown"; break;
@@ -189,31 +252,47 @@ namespace sharp {
     return id;
   }
 
+  /**
+   * Regenerate this table with something like:
+   *
+   * $ vips -l foreign | grep -i load | awk '{ print $2, $1; }'
+   *
+   * Plus a bit of editing.
+   */
   std::map<std::string, ImageType> loaderToType = {
-    { "jpegload", ImageType::JPEG },
-    { "jpegload_buffer", ImageType::JPEG },
-    { "pngload", ImageType::PNG },
-    { "pngload_buffer", ImageType::PNG },
-    { "webpload", ImageType::WEBP },
-    { "webpload_buffer", ImageType::WEBP },
-    { "tiffload", ImageType::TIFF },
-    { "tiffload_buffer", ImageType::TIFF },
-    { "gifload", ImageType::GIF },
-    { "gifload_buffer", ImageType::GIF },
-    { "svgload", ImageType::SVG },
-    { "svgload_buffer", ImageType::SVG },
-    { "heifload", ImageType::HEIF },
-    { "heifload_buffer", ImageType::HEIF },
-    { "pdfload", ImageType::PDF },
-    { "pdfload_buffer", ImageType::PDF },
-    { "magickload", ImageType::MAGICK },
-    { "magickload_buffer", ImageType::MAGICK },
-    { "openslideload", ImageType::OPENSLIDE },
-    { "ppmload", ImageType::PPM },
-    { "fitsload", ImageType::FITS },
-    { "openexrload", ImageType::EXR },
-    { "vipsload", ImageType::VIPS },
-    { "rawload", ImageType::RAW }
+    { "VipsForeignLoadJpegFile", ImageType::JPEG },
+    { "VipsForeignLoadJpegBuffer", ImageType::JPEG },
+    { "VipsForeignLoadPngFile", ImageType::PNG },
+    { "VipsForeignLoadPngBuffer", ImageType::PNG },
+    { "VipsForeignLoadWebpFile", ImageType::WEBP },
+    { "VipsForeignLoadWebpBuffer", ImageType::WEBP },
+    { "VipsForeignLoadTiffFile", ImageType::TIFF },
+    { "VipsForeignLoadTiffBuffer", ImageType::TIFF },
+    { "VipsForeignLoadGifFile", ImageType::GIF },
+    { "VipsForeignLoadGifBuffer", ImageType::GIF },
+    { "VipsForeignLoadNsgifFile", ImageType::GIF },
+    { "VipsForeignLoadNsgifBuffer", ImageType::GIF },
+    { "VipsForeignLoadJp2kBuffer", ImageType::JP2 },
+    { "VipsForeignLoadJp2kFile", ImageType::JP2 },
+    { "VipsForeignLoadSvgFile", ImageType::SVG },
+    { "VipsForeignLoadSvgBuffer", ImageType::SVG },
+    { "VipsForeignLoadHeifFile", ImageType::HEIF },
+    { "VipsForeignLoadHeifBuffer", ImageType::HEIF },
+    { "VipsForeignLoadPdfFile", ImageType::PDF },
+    { "VipsForeignLoadPdfBuffer", ImageType::PDF },
+    { "VipsForeignLoadMagickFile", ImageType::MAGICK },
+    { "VipsForeignLoadMagickBuffer", ImageType::MAGICK },
+    { "VipsForeignLoadMagick7File", ImageType::MAGICK },
+    { "VipsForeignLoadMagick7Buffer", ImageType::MAGICK },
+    { "VipsForeignLoadOpenslideFile", ImageType::OPENSLIDE },
+    { "VipsForeignLoadPpmFile", ImageType::PPM },
+    { "VipsForeignLoadFitsFile", ImageType::FITS },
+    { "VipsForeignLoadOpenexr", ImageType::EXR },
+    { "VipsForeignLoadJxlFile", ImageType::JXL },
+    { "VipsForeignLoadJxlBuffer", ImageType::JXL },
+    { "VipsForeignLoadVips", ImageType::VIPS },
+    { "VipsForeignLoadVipsFile", ImageType::VIPS },
+    { "VipsForeignLoadRaw", ImageType::RAW }
   };
 
   /*
@@ -223,7 +302,7 @@ namespace sharp {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load_buffer(buffer, length);
     if (load != nullptr) {
-      auto it = loaderToType.find(vips_nickname_find(g_type_from_name(load)));
+      auto it = loaderToType.find(load);
       if (it != loaderToType.end()) {
         imageType = it->second;
       }
@@ -238,7 +317,7 @@ namespace sharp {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load(file);
     if (load != nullptr) {
-      auto it = loaderToType.find(vips_nickname_find(g_type_from_name(load)));
+      auto it = loaderToType.find(load);
       if (it != loaderToType.end()) {
         imageType = it->second;
       }
@@ -258,11 +337,23 @@ namespace sharp {
       imageType == ImageType::WEBP ||
       imageType == ImageType::MAGICK ||
       imageType == ImageType::GIF ||
+      imageType == ImageType::JP2 ||
       imageType == ImageType::TIFF ||
       imageType == ImageType::HEIF ||
       imageType == ImageType::PDF;
   }
 
+  /*
+    Does this image type support removal of safety limits?
+  */
+  bool ImageTypeSupportsUnlimited(ImageType imageType) {
+    return
+      imageType == ImageType::JPEG ||
+      imageType == ImageType::PNG ||
+      imageType == ImageType::SVG ||
+      imageType == ImageType::HEIF;
+  }
+
   /*
     Open an image from the given InputDescriptor (filesystem, compressed buffer, raw pixel data)
   */
@@ -272,12 +363,16 @@ namespace sharp {
     if (descriptor->isBuffer) {
       if (descriptor->rawChannels > 0) {
         // Raw, uncompressed pixel data
+        bool const is8bit = vips_band_format_is8bit(descriptor->rawDepth);
         image = VImage::new_from_memory(descriptor->buffer, descriptor->bufferLength,
-          descriptor->rawWidth, descriptor->rawHeight, descriptor->rawChannels, VIPS_FORMAT_UCHAR);
+          descriptor->rawWidth, descriptor->rawHeight, descriptor->rawChannels, descriptor->rawDepth);
         if (descriptor->rawChannels < 3) {
-          image.get_image()->Type = VIPS_INTERPRETATION_B_W;
+          image.get_image()->Type = is8bit ? VIPS_INTERPRETATION_B_W : VIPS_INTERPRETATION_GREY16;
         } else {
-          image.get_image()->Type = VIPS_INTERPRETATION_sRGB;
+          image.get_image()->Type = is8bit ? VIPS_INTERPRETATION_sRGB : VIPS_INTERPRETATION_RGB16;
+        }
+        if (descriptor->rawPremultiplied) {
+          image = image.unpremultiply();
         }
         imageType = ImageType::RAW;
       } else {
@@ -287,8 +382,8 @@ namespace sharp {
           try {
             vips::VOption *option = VImage::option()
               ->set("access", descriptor->access)
-              ->set("fail", descriptor->failOnError);
-            if (imageType == ImageType::SVG) {
+              ->set("fail_on", descriptor->failOn);
+            if (descriptor->unlimited && ImageTypeSupportsUnlimited(imageType)) {
               option->set("unlimited", TRUE);
             }
             if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
@@ -304,6 +399,9 @@ namespace sharp {
             if (imageType == ImageType::OPENSLIDE) {
               option->set("level", descriptor->level);
             }
+            if (imageType == ImageType::TIFF) {
+              option->set("subifd", descriptor->subifd);
+            }
             image = VImage::new_from_buffer(descriptor->buffer, descriptor->bufferLength, nullptr, option);
             if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
               image = SetDensity(image, descriptor->density);
@@ -316,31 +414,80 @@ namespace sharp {
         }
       }
     } else {
-      if (descriptor->createChannels > 0) {
+      int const channels = descriptor->createChannels;
+      if (channels > 0) {
         // Create new image
-        std::vector<double> background = {
-          descriptor->createBackground[0],
-          descriptor->createBackground[1],
-          descriptor->createBackground[2]
-        };
-        if (descriptor->createChannels == 4) {
-          background.push_back(descriptor->createBackground[3]);
+        if (descriptor->createNoiseType == "gaussian") {
+          std::vector<VImage> bands = {};
+          bands.reserve(channels);
+          for (int _band = 0; _band < channels; _band++) {
+            bands.push_back(VImage::gaussnoise(descriptor->createWidth, descriptor->createHeight, VImage::option()
+              ->set("mean", descriptor->createNoiseMean)
+              ->set("sigma", descriptor->createNoiseSigma)));
+          }
+          image = VImage::bandjoin(bands).copy(VImage::option()->set("interpretation",
+            channels < 3 ? VIPS_INTERPRETATION_B_W: VIPS_INTERPRETATION_sRGB));
+        } else {
+          std::vector<double> background = {
+            descriptor->createBackground[0],
+            descriptor->createBackground[1],
+            descriptor->createBackground[2]
+          };
+          if (channels == 4) {
+            background.push_back(descriptor->createBackground[3]);
+          }
+          image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight)
+            .copy(VImage::option()->set("interpretation",
+              channels < 3 ? VIPS_INTERPRETATION_B_W : VIPS_INTERPRETATION_sRGB))
+            .new_from_image(background);
+        }
+        image = image.cast(VIPS_FORMAT_UCHAR);
+        imageType = ImageType::RAW;
+      } else if (descriptor->textValue.length() > 0) {
+        // Create a new image with text
+        vips::VOption *textOptions = VImage::option()
+          ->set("align", descriptor->textAlign)
+          ->set("justify", descriptor->textJustify)
+          ->set("rgba", descriptor->textRgba)
+          ->set("spacing", descriptor->textSpacing)
+          ->set("wrap", descriptor->textWrap)
+          ->set("autofit_dpi", &descriptor->textAutofitDpi);
+        if (descriptor->textWidth > 0) {
+          textOptions->set("width", descriptor->textWidth);
+        }
+        // Ignore dpi if height is set
+        if (descriptor->textWidth > 0 && descriptor->textHeight > 0) {
+          textOptions->set("height", descriptor->textHeight);
+        } else if (descriptor->textDpi > 0) {
+          textOptions->set("dpi", descriptor->textDpi);
+        }
+        if (descriptor->textFont.length() > 0) {
+          textOptions->set("font", const_cast<char*>(descriptor->textFont.data()));
+        }
+        if (descriptor->textFontfile.length() > 0) {
+          textOptions->set("fontfile", const_cast<char*>(descriptor->textFontfile.data()));
+        }
+        image = VImage::text(const_cast<char *>(descriptor->textValue.data()), textOptions);
+        if (!descriptor->textRgba) {
+          image = image.copy(VImage::option()->set("interpretation", VIPS_INTERPRETATION_B_W));
         }
-        image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight).new_from_image(background);
-        image.get_image()->Type = VIPS_INTERPRETATION_sRGB;
         imageType = ImageType::RAW;
       } else {
         // From filesystem
         imageType = DetermineImageType(descriptor->file.data());
         if (imageType == ImageType::MISSING) {
-          throw vips::VError("Input file is missing");
+          if (descriptor->file.find("<svg") != std::string::npos) {
+            throw vips::VError("Input file is missing, did you mean "
+              "sharp(Buffer.from('" + descriptor->file.substr(0, 8) + "...')?");
+          }
+          throw vips::VError("Input file is missing: " + descriptor->file);
         }
         if (imageType != ImageType::UNKNOWN) {
           try {
             vips::VOption *option = VImage::option()
               ->set("access", descriptor->access)
-              ->set("fail", descriptor->failOnError);
-            if (imageType == ImageType::SVG) {
+              ->set("fail_on", descriptor->failOn);
+            if (descriptor->unlimited && ImageTypeSupportsUnlimited(imageType)) {
               option->set("unlimited", TRUE);
             }
             if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
@@ -356,6 +503,9 @@ namespace sharp {
             if (imageType == ImageType::OPENSLIDE) {
               option->set("level", descriptor->level);
             }
+            if (imageType == ImageType::TIFF) {
+              option->set("subifd", descriptor->subifd);
+            }
             image = VImage::new_from_file(descriptor->file.data(), option);
             if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
               image = SetDensity(image, descriptor->density);
@@ -368,9 +518,10 @@ namespace sharp {
         }
       }
     }
+
     // Limit input images to a given number of pixels, where pixels = width * height
     if (descriptor->limitInputPixels > 0 &&
-      static_cast<uint64_t>(image.width() * image.height()) > static_cast<uint64_t>(descriptor->limitInputPixels)) {
+      static_cast<uint64_t>(image.width()) * image.height() > descriptor->limitInputPixels) {
       throw vips::VError("Input image exceeds pixel limit");
     }
     return std::make_tuple(image, imageType);
@@ -388,12 +539,7 @@ namespace sharp {
     Uses colour space interpretation with number of channels to guess this.
   */
   bool HasAlpha(VImage image) {
-    int const bands = image.bands();
-    VipsInterpretation const interpretation = image.interpretation();
-    return (
-      (bands == 2 && interpretation == VIPS_INTERPRETATION_B_W) ||
-      (bands == 4 && interpretation != VIPS_INTERPRETATION_CMYK) ||
-      (bands == 5 && interpretation == VIPS_INTERPRETATION_CMYK));
+    return image.has_alpha();
   }
 
   /*
@@ -422,41 +568,56 @@ namespace sharp {
   VImage RemoveExifOrientation(VImage image) {
     VImage copy = image.copy();
     copy.remove(VIPS_META_ORIENTATION);
+    copy.remove("exif-ifd0-Orientation");
     return copy;
   }
 
   /*
     Set animation properties if necessary.
-    Non-provided properties will be loaded from image.
   */
-  VImage SetAnimationProperties(VImage image, int pageHeight, std::vector<int> delay, int loop) {
-    bool hasDelay = delay.size() != 1 || delay.front() != -1;
+  VImage SetAnimationProperties(VImage image, int nPages, int pageHeight, std::vector<int> delay, int loop) {
+    bool hasDelay = !delay.empty();
 
-    if (pageHeight == 0 && image.get_typeof(VIPS_META_PAGE_HEIGHT) == G_TYPE_INT) {
-      pageHeight = image.get_int(VIPS_META_PAGE_HEIGHT);
+    // Avoid a copy if none of the animation properties are needed.
+    if (nPages == 1 && !hasDelay && loop == -1) return image;
+
+    if (delay.size() == 1) {
+      // We have just one delay, repeat that value for all frames.
+      delay.insert(delay.end(), nPages - 1, delay[0]);
     }
 
-    if (!hasDelay && image.get_typeof("delay") == VIPS_TYPE_ARRAY_INT) {
-      delay = image.get_array_int("delay");
-      hasDelay = true;
-    }
-
-    if (loop == -1 && image.get_typeof("loop") == G_TYPE_INT) {
-      loop = image.get_int("loop");
-    }
-
-    if (pageHeight == 0) return image;
-
-    // It is necessary to create the copy as otherwise, pageHeight will be ignored!
+    // Attaching metadata, need to copy the image.
     VImage copy = image.copy();
 
-    copy.set(VIPS_META_PAGE_HEIGHT, pageHeight);
+    // Only set page-height if we have more than one page, or this could
+    // accidentally turn into an animated image later.
+    if (nPages > 1) copy.set(VIPS_META_PAGE_HEIGHT, pageHeight);
     if (hasDelay) copy.set("delay", delay);
     if (loop != -1) copy.set("loop", loop);
 
     return copy;
   }
 
+  /*
+    Remove animation properties from image.
+  */
+  VImage RemoveAnimationProperties(VImage image) {
+    VImage copy = image.copy();
+    copy.remove(VIPS_META_PAGE_HEIGHT);
+    copy.remove("delay");
+    copy.remove("loop");
+    return copy;
+  }
+
+  /*
+    Remove GIF palette from image.
+  */
+  VImage RemoveGifPalette(VImage image) {
+    VImage copy = image.copy();
+    copy.remove("gif-palette");
+    return copy;
+  }
+
   /*
     Does this image have a non-default density?
   */
@@ -477,12 +638,19 @@ namespace sharp {
   VImage SetDensity(VImage image, const double density) {
     const double pixelsPerMm = density / 25.4;
     VImage copy = image.copy();
-    copy.set("Xres", pixelsPerMm);
-    copy.set("Yres", pixelsPerMm);
-    copy.set(VIPS_META_RESOLUTION_UNIT, "in");
+    copy.get_image()->Xres = pixelsPerMm;
+    copy.get_image()->Yres = pixelsPerMm;
     return copy;
   }
 
+  /*
+    Multi-page images can have a page height. Fetch it, and sanity check it.
+    If page-height is not set, it defaults to the image height
+  */
+  int GetPageHeight(VImage image) {
+    return vips_image_get_page_height(image.get_image());
+  }
+
   /*
     Check the proposed format supports the current dimensions.
   */
@@ -502,6 +670,10 @@ namespace sharp {
       if (image.width() > 65535 || height > 65535) {
         throw vips::VError("Processed image is too large for the GIF format");
       }
+    } else if (imageType == ImageType::HEIF) {
+      if (image.width() > 16384 || height > 16384) {
+        throw vips::VError("Processed image is too large for the HEIF format");
+      }
     }
   }
 
@@ -539,6 +711,32 @@ namespace sharp {
     return warning;
   }
 
+  /*
+    Attach an event listener for progress updates, used to detect timeout
+  */
+  void SetTimeout(VImage image, int const seconds) {
+    if (seconds > 0) {
+      VipsImage *im = image.get_image();
+      if (im->progress_signal == NULL) {
+        int *timeout = VIPS_NEW(im, int);
+        *timeout = seconds;
+        g_signal_connect(im, "eval", G_CALLBACK(VipsProgressCallBack), timeout);
+        vips_image_set_progress(im, TRUE);
+      }
+    }
+  }
+
+  /*
+    Event listener for progress updates, used to detect timeout
+  */
+  void VipsProgressCallBack(VipsImage *im, VipsProgress *progress, int *timeout) {
+    if (*timeout > 0 && progress->run >= *timeout) {
+      vips_image_set_kill(im, TRUE);
+      vips_error("timeout", "%d%% complete", progress->percent);
+      *timeout = 0;
+    }
+  }
+
   /*
     Calculate the (left, top) coordinates of the output image
     within the input image, applying the given gravity during an embed.
@@ -658,26 +856,18 @@ namespace sharp {
     int top = 0;
 
     // assign only if valid
-    if (x >= 0 && x < (inWidth - outWidth)) {
+    if (x < (inWidth - outWidth)) {
       left = x;
     } else if (x >= (inWidth - outWidth)) {
       left = inWidth - outWidth;
     }
 
-    if (y >= 0 && y < (inHeight - outHeight)) {
+    if (y < (inHeight - outHeight)) {
       top = y;
     } else if (y >= (inHeight - outHeight)) {
       top = inHeight - outHeight;
     }
 
-    // the resulting left and top could have been outside the image after calculation from bottom/right edges
-    if (left < 0) {
-      left = 0;
-    }
-    if (top < 0) {
-      top = 0;
-    }
-
     return std::make_tuple(left, top);
   }
 
@@ -696,42 +886,30 @@ namespace sharp {
     return Is16Bit(interpretation) ? 65535.0 : 255.0;
   }
 
-  /*
-    Get boolean operation type from string
-  */
-  VipsOperationBoolean GetBooleanOperation(std::string const opStr) {
-    return static_cast<VipsOperationBoolean>(
-      vips_enum_from_nick(nullptr, VIPS_TYPE_OPERATION_BOOLEAN, opStr.data()));
-  }
-
-  /*
-    Get interpretation type from string
-  */
-  VipsInterpretation GetInterpretation(std::string const typeStr) {
-    return static_cast<VipsInterpretation>(
-      vips_enum_from_nick(nullptr, VIPS_TYPE_INTERPRETATION, typeStr.data()));
-  }
-
   /*
     Convert RGBA value to another colourspace
   */
-  std::vector<double> GetRgbaAsColourspace(std::vector<double> const rgba, VipsInterpretation const interpretation) {
+  std::vector<double> GetRgbaAsColourspace(std::vector<double> const rgba,
+    VipsInterpretation const interpretation, bool premultiply) {
     int const bands = static_cast<int>(rgba.size());
-    if (bands < 3 || interpretation == VIPS_INTERPRETATION_sRGB || interpretation == VIPS_INTERPRETATION_RGB) {
+    if (bands < 3) {
       return rgba;
-    } else {
-      VImage pixel = VImage::new_matrix(1, 1);
-      pixel.set("bands", bands);
-      pixel = pixel.new_from_image(rgba);
-      pixel = pixel.colourspace(interpretation, VImage::option()->set("source_space", VIPS_INTERPRETATION_sRGB));
-      return pixel(0, 0);
     }
+    VImage pixel = VImage::new_matrix(1, 1);
+    pixel.set("bands", bands);
+    pixel = pixel
+      .new_from_image(rgba)
+      .colourspace(interpretation, VImage::option()->set("source_space", VIPS_INTERPRETATION_sRGB));
+    if (premultiply) {
+      pixel = pixel.premultiply();
+    }
+    return pixel(0, 0);
   }
 
   /*
     Apply the alpha channel to a given colour
   */
-  std::tuple<VImage, std::vector<double>> ApplyAlpha(VImage image, std::vector<double> colour) {
+  std::tuple<VImage, std::vector<double>> ApplyAlpha(VImage image, std::vector<double> colour, bool premultiply) {
     // Scale up 8-bit values to match 16-bit input image
     double const multiplier = sharp::Is16Bit(image.interpretation()) ? 256.0 : 1.0;
     // Create alphaColour colour
@@ -755,11 +933,11 @@ namespace sharp {
       alphaColour.push_back(colour[3] * multiplier);
     }
     // Ensure alphaColour colour uses correct colourspace
-    alphaColour = sharp::GetRgbaAsColourspace(alphaColour, image.interpretation());
+    alphaColour = sharp::GetRgbaAsColourspace(alphaColour, image.interpretation(), premultiply);
     // Add non-transparent alpha channel, if required
     if (colour[3] < 255.0 && !HasAlpha(image)) {
       image = image.bandjoin(
-        VImage::new_matrix(image.width(), image.height()).new_from_image(255 * multiplier));
+        VImage::new_matrix(image.width(), image.height()).new_from_image(255 * multiplier).cast(image.format()));
     }
     return std::make_tuple(image, alphaColour);
   }
@@ -777,12 +955,89 @@ namespace sharp {
   /*
     Ensures alpha channel, if missing.
   */
-  VImage EnsureAlpha(VImage image) {
+  VImage EnsureAlpha(VImage image, double const value) {
     if (!HasAlpha(image)) {
       std::vector<double> alpha;
-      alpha.push_back(sharp::MaximumImageAlpha(image.interpretation()));
+      alpha.push_back(value * sharp::MaximumImageAlpha(image.interpretation()));
       image = image.bandjoin_const(alpha);
     }
     return image;
   }
+
+  std::pair<double, double> ResolveShrink(int width, int height, int targetWidth, int targetHeight,
+    Canvas canvas, bool withoutEnlargement, bool withoutReduction) {
+    double hshrink = 1.0;
+    double vshrink = 1.0;
+
+    if (targetWidth > 0 && targetHeight > 0) {
+      // Fixed width and height
+      hshrink = static_cast<double>(width) / targetWidth;
+      vshrink = static_cast<double>(height) / targetHeight;
+
+      switch (canvas) {
+        case Canvas::CROP:
+        case Canvas::MIN:
+          if (hshrink < vshrink) {
+            vshrink = hshrink;
+          } else {
+            hshrink = vshrink;
+          }
+          break;
+        case Canvas::EMBED:
+        case Canvas::MAX:
+          if (hshrink > vshrink) {
+            vshrink = hshrink;
+          } else {
+            hshrink = vshrink;
+          }
+          break;
+        case Canvas::IGNORE_ASPECT:
+          break;
+      }
+    } else if (targetWidth > 0) {
+      // Fixed width
+      hshrink = static_cast<double>(width) / targetWidth;
+
+      if (canvas != Canvas::IGNORE_ASPECT) {
+        // Auto height
+        vshrink = hshrink;
+      }
+    } else if (targetHeight > 0) {
+      // Fixed height
+      vshrink = static_cast<double>(height) / targetHeight;
+
+      if (canvas != Canvas::IGNORE_ASPECT) {
+        // Auto width
+        hshrink = vshrink;
+      }
+    }
+
+    // We should not reduce or enlarge the output image, if
+    // withoutReduction or withoutEnlargement is specified.
+    if (withoutReduction) {
+      // Equivalent of VIPS_SIZE_UP
+      hshrink = std::min(1.0, hshrink);
+      vshrink = std::min(1.0, vshrink);
+    } else if (withoutEnlargement) {
+      // Equivalent of VIPS_SIZE_DOWN
+      hshrink = std::max(1.0, hshrink);
+      vshrink = std::max(1.0, vshrink);
+    }
+
+    // We don't want to shrink so much that we send an axis to 0
+    hshrink = std::min(hshrink, static_cast<double>(width));
+    vshrink = std::min(vshrink, static_cast<double>(height));
+
+    return std::make_pair(hshrink, vshrink);
+  }
+
+  /*
+    Ensure decoding remains sequential.
+  */
+  VImage StaySequential(VImage image, VipsAccess access, bool condition) {
+    if (access == VIPS_ACCESS_SEQUENTIAL && condition) {
+      return image.copy_memory();
+    }
+    return image;
+  }
 }  // namespace sharp

src/common.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_COMMON_H_
 #define SRC_COMMON_H_
@@ -18,14 +7,17 @@
 #include <string>
 #include <tuple>
 #include <vector>
+#include <atomic>
 
 #include <napi.h>
 #include <vips/vips8>
 
 // Verify platform and compiler compatibility
 
-#if (VIPS_MAJOR_VERSION < 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 10))
-#error "libvips version 8.10.0+ is required - please see https://sharp.pixelplumbing.com/install"
+#if (VIPS_MAJOR_VERSION < 8) || \
+  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 14) || \
+  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION == 14 && VIPS_MICRO_VERSION < 5)
+#error "libvips version 8.14.5+ is required - please see https://sharp.pixelplumbing.com/install"
 #endif
 
 #if ((!defined(__clang__)) && defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)))
@@ -46,46 +38,83 @@ namespace sharp {
     std::string name;
     std::string file;
     char *buffer;
-    bool failOnError;
-    int limitInputPixels;
+    VipsFailOn failOn;
+    uint64_t limitInputPixels;
+    bool unlimited;
     VipsAccess access;
     size_t bufferLength;
     bool isBuffer;
     double density;
+    bool ignoreIcc;
+    VipsBandFormat rawDepth;
     int rawChannels;
     int rawWidth;
     int rawHeight;
+    bool rawPremultiplied;
     int pages;
     int page;
     int level;
+    int subifd;
     int createChannels;
     int createWidth;
     int createHeight;
     std::vector<double> createBackground;
+    std::string createNoiseType;
+    double createNoiseMean;
+    double createNoiseSigma;
+    std::string textValue;
+    std::string textFont;
+    std::string textFontfile;
+    int textWidth;
+    int textHeight;
+    VipsAlign textAlign;
+    bool textJustify;
+    int textDpi;
+    bool textRgba;
+    int textSpacing;
+    VipsTextWrap textWrap;
+    int textAutofitDpi;
 
     InputDescriptor():
       buffer(nullptr),
-      failOnError(TRUE),
+      failOn(VIPS_FAIL_ON_WARNING),
       limitInputPixels(0x3FFF * 0x3FFF),
+      unlimited(FALSE),
       access(VIPS_ACCESS_RANDOM),
       bufferLength(0),
       isBuffer(FALSE),
       density(72.0),
+      ignoreIcc(FALSE),
+      rawDepth(VIPS_FORMAT_UCHAR),
       rawChannels(0),
       rawWidth(0),
       rawHeight(0),
+      rawPremultiplied(false),
       pages(1),
       page(0),
       level(0),
+      subifd(-1),
       createChannels(0),
       createWidth(0),
       createHeight(0),
-      createBackground{ 0.0, 0.0, 0.0, 255.0 } {}
+      createBackground{ 0.0, 0.0, 0.0, 255.0 },
+      createNoiseMean(0.0),
+      createNoiseSigma(0.0),
+      textWidth(0),
+      textHeight(0),
+      textAlign(VIPS_ALIGN_LOW),
+      textJustify(FALSE),
+      textDpi(72),
+      textRgba(FALSE),
+      textSpacing(0),
+      textWrap(VIPS_TEXT_WRAP_WORD),
+      textAutofitDpi(0) {}
   };
 
   // Convenience methods to access the attributes of a Napi::Object
   bool HasAttr(Napi::Object obj, std::string attr);
   std::string AttrAsStr(Napi::Object obj, std::string attr);
+  std::string AttrAsStr(Napi::Object obj, unsigned int const attr);
   uint32_t AttrAsUint32(Napi::Object obj, std::string attr);
   int32_t AttrAsInt32(Napi::Object obj, std::string attr);
   int32_t AttrAsInt32(Napi::Object obj, unsigned int const attr);
@@ -94,6 +123,10 @@ namespace sharp {
   bool AttrAsBool(Napi::Object obj, std::string attr);
   std::vector<double> AttrAsVectorOfDouble(Napi::Object obj, std::string attr);
   std::vector<int32_t> AttrAsInt32Vector(Napi::Object obj, std::string attr);
+  template <class T> T AttrAsEnum(Napi::Object obj, std::string attr, GType type) {
+    return static_cast<T>(
+      vips_enum_from_nick(nullptr, type, AttrAsStr(obj, attr).data()));
+  }
 
   // Create an InputDescriptor instance from a Napi::Object describing an input image
   InputDescriptor* CreateInputDescriptor(Napi::Object input);
@@ -102,6 +135,7 @@ namespace sharp {
     JPEG,
     PNG,
     WEBP,
+    JP2,
     TIFF,
     GIF,
     SVG,
@@ -112,31 +146,47 @@ namespace sharp {
     PPM,
     FITS,
     EXR,
+    JXL,
     VIPS,
     RAW,
     UNKNOWN,
     MISSING
   };
 
+  enum class Canvas {
+      CROP,
+      EMBED,
+      MAX,
+      MIN,
+      IGNORE_ASPECT
+  };
+
   // How many tasks are in the queue?
-  extern volatile int counterQueue;
+  extern std::atomic<int> counterQueue;
 
   // How many tasks are being processed?
-  extern volatile int counterProcess;
+  extern std::atomic<int> counterProcess;
 
   // Filename extension checkers
   bool IsJpeg(std::string const &str);
   bool IsPng(std::string const &str);
   bool IsWebp(std::string const &str);
+  bool IsJp2(std::string const &str);
   bool IsGif(std::string const &str);
   bool IsTiff(std::string const &str);
   bool IsHeic(std::string const &str);
   bool IsHeif(std::string const &str);
   bool IsAvif(std::string const &str);
+  bool IsJxl(std::string const &str);
   bool IsDz(std::string const &str);
   bool IsDzZip(std::string const &str);
   bool IsV(std::string const &str);
 
+  /*
+    Trim space from end of string.
+  */
+  std::string TrimEnd(std::string const &str);
+
   /*
     Provide a string identifier for the given image type.
   */
@@ -157,6 +207,11 @@ namespace sharp {
   */
   bool ImageTypeSupportsPage(ImageType imageType);
 
+  /*
+    Does this image type support removal of safety limits?
+  */
+  bool ImageTypeSupportsUnlimited(ImageType imageType);
+
   /*
     Open an image from the given InputDescriptor (filesystem, compressed buffer, raw pixel data)
   */
@@ -190,9 +245,18 @@ namespace sharp {
 
   /*
     Set animation properties if necessary.
-    Non-provided properties will be loaded from image.
   */
-  VImage SetAnimationProperties(VImage image, int pageHeight, std::vector<int> delay, int loop);
+  VImage SetAnimationProperties(VImage image, int nPages, int pageHeight, std::vector<int> delay, int loop);
+
+  /*
+    Remove animation properties from image.
+  */
+  VImage RemoveAnimationProperties(VImage image);
+
+  /*
+    Remove GIF palette from image.
+  */
+  VImage RemoveGifPalette(VImage image);
 
   /*
     Does this image have a non-default density?
@@ -209,6 +273,12 @@ namespace sharp {
   */
   VImage SetDensity(VImage image, const double density);
 
+  /*
+    Multi-page images can have a page height. Fetch it, and sanity check it.
+    If page-height is not set, it defaults to the image height
+  */
+  int GetPageHeight(VImage image);
+
   /*
     Check the proposed format supports the current dimensions.
   */
@@ -229,6 +299,16 @@ namespace sharp {
   */
   std::string VipsWarningPop();
 
+  /*
+    Attach an event listener for progress updates, used to detect timeout
+  */
+  void SetTimeout(VImage image, int const timeoutSeconds);
+
+  /*
+    Event listener for progress updates, used to detect timeout
+  */
+  void VipsProgressCallBack(VipsImage *image, VipsProgress *progress, int *timeoutSeconds);
+
   /*
     Calculate the (left, top) coordinates of the output image
     within the input image, applying the given gravity during an embed.
@@ -261,25 +341,16 @@ namespace sharp {
   */
   double MaximumImageAlpha(VipsInterpretation const interpretation);
 
-  /*
-    Get boolean operation type from string
-  */
-  VipsOperationBoolean GetBooleanOperation(std::string const opStr);
-
-  /*
-    Get interpretation type from string
-  */
-  VipsInterpretation GetInterpretation(std::string const typeStr);
-
   /*
     Convert RGBA value to another colourspace
   */
-  std::vector<double> GetRgbaAsColourspace(std::vector<double> const rgba, VipsInterpretation const interpretation);
+  std::vector<double> GetRgbaAsColourspace(std::vector<double> const rgba,
+    VipsInterpretation const interpretation, bool premultiply);
 
   /*
     Apply the alpha channel to a given colour
    */
-  std::tuple<VImage, std::vector<double>> ApplyAlpha(VImage image, std::vector<double> colour);
+  std::tuple<VImage, std::vector<double>> ApplyAlpha(VImage image, std::vector<double> colour, bool premultiply);
 
   /*
     Removes alpha channel, if any.
@@ -289,7 +360,18 @@ namespace sharp {
   /*
     Ensures alpha channel, if missing.
   */
-  VImage EnsureAlpha(VImage image);
+  VImage EnsureAlpha(VImage image, double const value);
+
+  /*
+    Calculate the horizontal and vertical shrink factors, taking the canvas mode into account.
+  */
+  std::pair<double, double> ResolveShrink(int width, int height, int targetWidth, int targetHeight,
+    Canvas canvas, bool withoutEnlargement, bool withoutReduction);
+
+  /*
+    Ensure decoding remains sequential.
+  */
+  VImage StaySequential(VImage image, VipsAccess access, bool condition = TRUE);
 
 }  // namespace sharp
 

src/libvips/cplusplus/VConnection.cpp

@@ -1,178 +0,0 @@
-/* Object part of the VSource and VTarget class
- */
-
-/*
-
-    Copyright (C) 1991-2001 The National Gallery
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU Lesser General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-    02110-1301  USA
-
- */
-
-/*
-
-    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
-
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif /*HAVE_CONFIG_H*/
-#include <vips/intl.h>
-
-#include <vips/vips8>
-
-#include <vips/debug.h>
-
-/*
-#define VIPS_DEBUG
-#define VIPS_DEBUG_VERBOSE
- */
-
-VIPS_NAMESPACE_START
-
-VSource 
-VSource::new_from_descriptor( int descriptor )
-{
-	VipsSource *input;
-
-	if( !(input = vips_source_new_from_descriptor( descriptor )) )
-		throw VError();
-
-	VSource out( input ); 
-
-	return( out ); 
-}
-
-VSource 
-VSource::new_from_file( const char *filename )
-{
-	VipsSource *input;
-
-	if( !(input = vips_source_new_from_file( filename )) )
-		throw VError();
-
-	VSource out( input ); 
-
-	return( out ); 
-}
-
-VSource 
-VSource::new_from_blob( VipsBlob *blob )
-{
-	VipsSource *input;
-
-	if( !(input = vips_source_new_from_blob( blob )) )
-		throw VError();
-
-	VSource out( input ); 
-
-	return( out ); 
-}
-
-VSource 
-VSource::new_from_memory( const void *data, 
-	size_t size )
-{
-	VipsSource *input;
-
-	if( !(input = vips_source_new_from_memory( data, size )) )
-		throw VError();
-
-	VSource out( input ); 
-
-	return( out ); 
-}
-
-VSource 
-VSource::new_from_options( const char *options )
-{
-	VipsSource *input;
-
-	if( !(input = vips_source_new_from_options( options )) )
-		throw VError();
-
-	VSource out( input ); 
-
-	return( out ); 
-}
-
-VOption *
-VOption::set( const char *name, const VSource value )
-{
-	Pair *pair = new Pair( name );
-
-	pair->input = true;
-	g_value_init( &pair->value, VIPS_TYPE_SOURCE );
-	g_value_set_object( &pair->value, value.get_source() );
-	options.push_back( pair );
-
-	return( this );
-}
-
-VTarget 
-VTarget::new_to_descriptor( int descriptor )
-{
-	VipsTarget *output;
-
-	if( !(output = vips_target_new_to_descriptor( descriptor )) )
-		throw VError();
-
-	VTarget out( output ); 
-
-	return( out ); 
-}
-
-VTarget 
-VTarget::new_to_file( const char *filename )
-{
-	VipsTarget *output;
-
-	if( !(output = vips_target_new_to_file( filename )) )
-		throw VError();
-
-	VTarget out( output ); 
-
-	return( out ); 
-}
-
-VTarget 
-VTarget::new_to_memory()
-{
-	VipsTarget *output;
-
-	if( !(output = vips_target_new_to_memory()) )
-		throw VError();
-
-	VTarget out( output ); 
-
-	return( out ); 
-}
-
-VOption *
-VOption::set( const char *name, const VTarget value )
-{
-	Pair *pair = new Pair( name );
-
-	pair->input = true;
-	g_value_init( &pair->value, VIPS_TYPE_TARGET );
-	g_value_set_object( &pair->value, value.get_target() );
-	options.push_back( pair );
-
-	return( this );
-}
-
-VIPS_NAMESPACE_END

src/libvips/cplusplus/VError.cpp

@@ -1,50 +0,0 @@
-// Code for error type
-
-/*
-
-    Copyright (C) 1991-2001 The National Gallery
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU Lesser General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-    02110-1301  USA
-
- */
-
-/*
-
-    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
-
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif /*HAVE_CONFIG_H*/
-#include <vips/intl.h>
-
-#include <vips/vips8>
-
-VIPS_NAMESPACE_START
-
-std::ostream &operator<<( std::ostream &file, const VError &err )
-{
-	err.ostream_print( file );
-	return( file );
-}
-
-void VError::ostream_print( std::ostream &file ) const
-{
-	file << _what;
-}
-
-VIPS_NAMESPACE_END

src/libvips/cplusplus/VInterpolate.cpp

@@ -1,76 +0,0 @@
-/* Object part of VInterpolate class
- */
-
-/*
-
-    Copyright (C) 1991-2001 The National Gallery
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU Lesser General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-    02110-1301  USA
-
- */
-
-/*
-
-    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
-
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif /*HAVE_CONFIG_H*/
-#include <vips/intl.h>
-
-#include <vips/vips8>
-
-#include <vips/debug.h>
-
-/*
-#define VIPS_DEBUG
-#define VIPS_DEBUG_VERBOSE
- */
-
-VIPS_NAMESPACE_START
-
-VInterpolate 
-VInterpolate::new_from_name( const char *name, VOption *options )
-{
-	VipsInterpolate *interp;
-
-	if( !(interp = vips_interpolate_new( name )) ) {
-		delete options; 
-		throw VError(); 
-	}
-	delete options; 
-
-	VInterpolate out( interp ); 
-
-	return( out ); 
-}
-
-VOption *
-VOption::set( const char *name, const VInterpolate value )
-{
-	Pair *pair = new Pair( name );
-
-	pair->input = true;
-	g_value_init( &pair->value, VIPS_TYPE_INTERPOLATE );
-	g_value_set_object( &pair->value, value.get_interpolate() );
-	options.push_back( pair );
-
-	return( this );
-}
-
-VIPS_NAMESPACE_END

src/metadata.cc

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #include <numeric>
 #include <vector>
@@ -29,7 +18,7 @@ class MetadataWorker : public Napi::AsyncWorker {
 
   void Execute() {
     // Decrement queued task counter
-    g_atomic_int_dec_and_test(&sharp::counterQueue);
+    sharp::counterQueue--;
 
     vips::VImage image;
     sharp::ImageType imageType = sharp::ImageType::UNKNOWN;
@@ -74,6 +63,15 @@ class MetadataWorker : public Napi::AsyncWorker {
       if (image.get_typeof("heif-primary") == G_TYPE_INT) {
         baton->pagePrimary = image.get_int("heif-primary");
       }
+      if (image.get_typeof("heif-compression") == VIPS_TYPE_REF_STRING) {
+        baton->compression = image.get_string("heif-compression");
+      }
+      if (image.get_typeof(VIPS_META_RESOLUTION_UNIT) == VIPS_TYPE_REF_STRING) {
+        baton->resolutionUnit = image.get_string(VIPS_META_RESOLUTION_UNIT);
+      }
+      if (image.get_typeof("magick-format") == VIPS_TYPE_REF_STRING) {
+        baton->formatMagick = image.get_string("magick-format");
+      }
       if (image.get_typeof("openslide.level-count") == VIPS_TYPE_REF_STRING) {
         int const levels = std::stoi(image.get_string("openslide.level-count"));
         for (int l = 0; l < levels; l++) {
@@ -83,7 +81,13 @@ class MetadataWorker : public Napi::AsyncWorker {
           baton->levels.push_back(std::pair<int, int>(width, height));
         }
       }
+      if (image.get_typeof(VIPS_META_N_SUBIFDS) == G_TYPE_INT) {
+        baton->subifds = image.get_int(VIPS_META_N_SUBIFDS);
+      }
       baton->hasProfile = sharp::HasProfile(image);
+      if (image.get_typeof("background") == VIPS_TYPE_ARRAY_DOUBLE) {
+        baton->background = image.get_array_double("background");
+      }
       // Derived attributes
       baton->hasAlpha = sharp::HasAlpha(image);
       baton->orientation = sharp::ExifOrientation(image);
@@ -141,7 +145,7 @@ class MetadataWorker : public Napi::AsyncWorker {
     // Handle warnings
     std::string warning = sharp::VipsWarningPop();
     while (!warning.empty()) {
-      debuglog.Call({ Napi::String::New(env, warning) });
+      debuglog.MakeCallback(Receiver().Value(), { Napi::String::New(env, warning) });
       warning = sharp::VipsWarningPop();
     }
 
@@ -186,6 +190,15 @@ class MetadataWorker : public Napi::AsyncWorker {
       if (baton->pagePrimary > -1) {
         info.Set("pagePrimary", baton->pagePrimary);
       }
+      if (!baton->compression.empty()) {
+        info.Set("compression", baton->compression);
+      }
+      if (!baton->resolutionUnit.empty()) {
+        info.Set("resolutionUnit", baton->resolutionUnit == "in" ? "inch" : baton->resolutionUnit);
+      }
+      if (!baton->formatMagick.empty()) {
+        info.Set("formatMagick", baton->formatMagick);
+      }
       if (!baton->levels.empty()) {
         int i = 0;
         Napi::Array levels = Napi::Array::New(env, static_cast<size_t>(baton->levels.size()));
@@ -197,30 +210,45 @@ class MetadataWorker : public Napi::AsyncWorker {
         }
         info.Set("levels", levels);
       }
+      if (baton->subifds > 0) {
+        info.Set("subifds", baton->subifds);
+      }
+      if (!baton->background.empty()) {
+        if (baton->background.size() == 3) {
+          Napi::Object background = Napi::Object::New(env);
+          background.Set("r", baton->background[0]);
+          background.Set("g", baton->background[1]);
+          background.Set("b", baton->background[2]);
+          info.Set("background", background);
+        } else {
+          info.Set("background", baton->background[0]);
+        }
+      }
       info.Set("hasProfile", baton->hasProfile);
       info.Set("hasAlpha", baton->hasAlpha);
       if (baton->orientation > 0) {
         info.Set("orientation", baton->orientation);
       }
       if (baton->exifLength > 0) {
-        info.Set("exif", Napi::Buffer<char>::New(env, baton->exif, baton->exifLength, sharp::FreeCallback));
+        info.Set("exif", Napi::Buffer<char>::NewOrCopy(env, baton->exif, baton->exifLength, sharp::FreeCallback));
       }
       if (baton->iccLength > 0) {
-        info.Set("icc", Napi::Buffer<char>::New(env, baton->icc, baton->iccLength, sharp::FreeCallback));
+        info.Set("icc", Napi::Buffer<char>::NewOrCopy(env, baton->icc, baton->iccLength, sharp::FreeCallback));
       }
       if (baton->iptcLength > 0) {
-        info.Set("iptc", Napi::Buffer<char>::New(env, baton->iptc, baton->iptcLength, sharp::FreeCallback));
+        info.Set("iptc", Napi::Buffer<char>::NewOrCopy(env, baton->iptc, baton->iptcLength, sharp::FreeCallback));
       }
       if (baton->xmpLength > 0) {
-        info.Set("xmp", Napi::Buffer<char>::New(env, baton->xmp, baton->xmpLength, sharp::FreeCallback));
+        info.Set("xmp", Napi::Buffer<char>::NewOrCopy(env, baton->xmp, baton->xmpLength, sharp::FreeCallback));
       }
       if (baton->tifftagPhotoshopLength > 0) {
         info.Set("tifftagPhotoshop",
-          Napi::Buffer<char>::New(env, baton->tifftagPhotoshop, baton->tifftagPhotoshopLength, sharp::FreeCallback));
+          Napi::Buffer<char>::NewOrCopy(env, baton->tifftagPhotoshop,
+            baton->tifftagPhotoshopLength, sharp::FreeCallback));
       }
       Callback().MakeCallback(Receiver().Value(), { env.Null(), info });
     } else {
-      Callback().MakeCallback(Receiver().Value(), { Napi::Error::New(env, baton->err).Value() });
+      Callback().MakeCallback(Receiver().Value(), { Napi::Error::New(env, sharp::TrimEnd(baton->err)).Value() });
     }
 
     delete baton->input;
@@ -238,7 +266,7 @@ class MetadataWorker : public Napi::AsyncWorker {
 Napi::Value metadata(const Napi::CallbackInfo& info) {
   // V8 objects are converted to non-V8 types held in the baton struct
   MetadataBaton *baton = new MetadataBaton;
-  Napi::Object options = info[0].As<Napi::Object>();
+  Napi::Object options = info[size_t(0)].As<Napi::Object>();
 
   // Input
   baton->input = sharp::CreateInputDescriptor(options.Get("input").As<Napi::Object>());
@@ -247,13 +275,13 @@ Napi::Value metadata(const Napi::CallbackInfo& info) {
   Napi::Function debuglog = options.Get("debuglog").As<Napi::Function>();
 
   // Join queue for worker thread
-  Napi::Function callback = info[1].As<Napi::Function>();
+  Napi::Function callback = info[size_t(1)].As<Napi::Function>();
   MetadataWorker *worker = new MetadataWorker(callback, baton, debuglog);
   worker->Receiver().Set("options", options);
   worker->Queue();
 
   // Increment queued task counter
-  g_atomic_int_inc(&sharp::counterQueue);
+  sharp::counterQueue++;
 
   return info.Env().Undefined();
 }

src/metadata.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_METADATA_H_
 #define SRC_METADATA_H_
@@ -39,7 +28,12 @@ struct MetadataBaton {
   int loop;
   std::vector<int> delay;
   int pagePrimary;
+  std::string compression;
+  std::string resolutionUnit;
+  std::string formatMagick;
   std::vector<std::pair<int, int>> levels;
+  int subifds;
+  std::vector<double> background;
   bool hasProfile;
   bool hasAlpha;
   int orientation;
@@ -67,6 +61,7 @@ struct MetadataBaton {
     pageHeight(0),
     loop(-1),
     pagePrimary(-1),
+    subifds(0),
     hasProfile(false),
     hasAlpha(false),
     orientation(0),

src/operations.cc

@@ -1,23 +1,11 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #include <algorithm>
 #include <functional>
 #include <memory>
 #include <tuple>
 #include <vector>
-
 #include <vips/vips8>
 
 #include "common.h"
@@ -57,7 +45,7 @@ namespace sharp {
   /*
    * Stretch luminance to cover full dynamic range.
    */
-  VImage Normalise(VImage image) {
+  VImage Normalise(VImage image, int const lower, int const upper) {
     // Get original colourspace
     VipsInterpretation typeBeforeNormalize = image.interpretation();
     if (typeBeforeNormalize == VIPS_INTERPRETATION_RGB) {
@@ -67,11 +55,12 @@ namespace sharp {
     VImage lab = image.colourspace(VIPS_INTERPRETATION_LAB);
     // Extract luminance
     VImage luminance = lab[0];
+
     // Find luminance range
-    VImage stats = luminance.stats();
-    double min = stats(0, 0)[0];
-    double max = stats(1, 0)[0];
-    if (min != max) {
+    int const min = lower == 0 ? luminance.min() : luminance.percent(lower);
+    int const max = upper == 100 ? luminance.max() : luminance.percent(upper);
+
+    if (std::abs(max - min) > 1) {
       // Extract chroma
       VImage chroma = lab.extract_band(1, VImage::option()->set("n", 2));
       // Calculate multiplication factor and addition
@@ -92,6 +81,13 @@ namespace sharp {
     return image;
   }
 
+  /*
+   * Contrast limiting adapative histogram equalization (CLAHE)
+   */
+  VImage Clahe(VImage image, int const width, int const height, int const maxSlope) {
+    return image.hist_local(width, height, VImage::option()->set("max_slope", maxSlope));
+  }
+
   /*
    * Gamma encoding/decoding
    */
@@ -105,6 +101,32 @@ namespace sharp {
     }
   }
 
+  /*
+   * Flatten image to remove alpha channel
+   */
+  VImage Flatten(VImage image, std::vector<double> flattenBackground) {
+    double const multiplier = sharp::Is16Bit(image.interpretation()) ? 256.0 : 1.0;
+    std::vector<double> background {
+      flattenBackground[0] * multiplier,
+      flattenBackground[1] * multiplier,
+      flattenBackground[2] * multiplier
+    };
+    return image.flatten(VImage::option()->set("background", background));
+  }
+
+  /**
+   * Produce the "negative" of the image.
+   */
+  VImage Negate(VImage image, bool const negateAlpha) {
+    if (HasAlpha(image) && !negateAlpha) {
+      // Separate alpha channel
+      VImage alpha = image[image.bands() - 1];
+      return RemoveAlpha(image).invert().bandjoin(alpha);
+    } else {
+      return image.invert();
+    }
+  }
+
   /*
    * Gaussian blur. Use sigma of -1.0 for fast blur.
    */
@@ -149,8 +171,8 @@ namespace sharp {
    */
   VImage Recomb(VImage image, std::unique_ptr<double[]> const &matrix) {
     double *m = matrix.get();
+    image = image.colourspace(VIPS_INTERPRETATION_sRGB);
     return image
-      .colourspace(VIPS_INTERPRETATION_sRGB)
       .recomb(image.bands() == 3
         ? VImage::new_from_memory(
           m, 9 * sizeof(double), 3, 3, 1, VIPS_FORMAT_DOUBLE
@@ -162,7 +184,9 @@ namespace sharp {
           0.0, 0.0, 0.0, 1.0));
   }
 
-  VImage Modulate(VImage image, double const brightness, double const saturation, int const hue) {
+  VImage Modulate(VImage image, double const brightness, double const saturation,
+                  int const hue, double const lightness) {
+    VipsInterpretation colourspaceBeforeModulate = image.interpretation();
     if (HasAlpha(image)) {
       // Separate alpha channel
       VImage alpha = image[image.bands() - 1];
@@ -170,25 +194,26 @@ namespace sharp {
         .colourspace(VIPS_INTERPRETATION_LCH)
         .linear(
           { brightness, saturation, 1},
-          { 0.0, 0.0, static_cast<double>(hue) }
+          { lightness, 0.0, static_cast<double>(hue) }
         )
-        .colourspace(VIPS_INTERPRETATION_sRGB)
+        .colourspace(colourspaceBeforeModulate)
         .bandjoin(alpha);
     } else {
       return image
         .colourspace(VIPS_INTERPRETATION_LCH)
         .linear(
           { brightness, saturation, 1 },
-          { 0.0, 0.0, static_cast<double>(hue) }
+          { lightness, 0.0, static_cast<double>(hue) }
         )
-        .colourspace(VIPS_INTERPRETATION_sRGB);
+        .colourspace(colourspaceBeforeModulate);
     }
   }
 
   /*
    * Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
    */
-  VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged) {
+  VImage Sharpen(VImage image, double const sigma, double const m1, double const m2,
+    double const x1, double const y2, double const y3) {
     if (sigma == -1.0) {
       // Fast, mild sharpen
       VImage sharpen = VImage::new_matrixv(3, 3,
@@ -203,8 +228,14 @@ namespace sharp {
       if (colourspaceBeforeSharpen == VIPS_INTERPRETATION_RGB) {
         colourspaceBeforeSharpen = VIPS_INTERPRETATION_sRGB;
       }
-      return image.sharpen(
-        VImage::option()->set("sigma", sigma)->set("m1", flat)->set("m2", jagged))
+      return image
+        .sharpen(VImage::option()
+          ->set("sigma", sigma)
+          ->set("m1", m1)
+          ->set("m2", m2)
+          ->set("x1", x1)
+          ->set("y2", y2)
+          ->set("y3", y3))
         .colourspace(colourspaceBeforeSharpen);
     }
   }
@@ -234,45 +265,190 @@ namespace sharp {
   /*
     Trim an image
   */
-  VImage Trim(VImage image, double const threshold) {
+  VImage Trim(VImage image, std::vector<double> background, double threshold) {
     if (image.width() < 3 && image.height() < 3) {
       throw VError("Image to trim must be at least 3x3 pixels");
     }
-    // Top-left pixel provides the background colour
-    VImage background = image.extract_area(0, 0, 1, 1);
-    if (HasAlpha(background)) {
-      background = background.flatten();
+    if (background.size() == 0) {
+      // Top-left pixel provides the default background colour if none is given
+      background = image.extract_area(0, 0, 1, 1)(0, 0);
+    } else if (sharp::Is16Bit(image.interpretation())) {
+      for (size_t i = 0; i < background.size(); i++) {
+        background[i] *= 256.0;
+      }
+      threshold *= 256.0;
+    }
+    std::vector<double> backgroundAlpha({ background.back() });
+    if (HasAlpha(image)) {
+      background.pop_back();
+    } else {
+      background.resize(image.bands());
     }
     int left, top, width, height;
     left = image.find_trim(&top, &width, &height, VImage::option()
-      ->set("background", background(0, 0))
+      ->set("background", background)
       ->set("threshold", threshold));
-    if (width == 0 || height == 0) {
-      if (HasAlpha(image)) {
-        // Search alpha channel
-        VImage alpha = image[image.bands() - 1];
-        VImage backgroundAlpha = alpha.extract_area(0, 0, 1, 1);
-        left = alpha.find_trim(&top, &width, &height, VImage::option()
-          ->set("background", backgroundAlpha(0, 0))
-          ->set("threshold", threshold));
-      }
-      if (width == 0 || height == 0) {
-        throw VError("Unexpected error while trimming. Try to lower the tolerance");
+    if (HasAlpha(image)) {
+      // Search alpha channel (A)
+      int leftA, topA, widthA, heightA;
+      VImage alpha = image[image.bands() - 1];
+      leftA = alpha.find_trim(&topA, &widthA, &heightA, VImage::option()
+        ->set("background", backgroundAlpha)
+        ->set("threshold", threshold));
+      if (widthA > 0 && heightA > 0) {
+        if (width > 0 && height > 0) {
+          // Combined bounding box (B)
+          int const leftB = std::min(left, leftA);
+          int const topB = std::min(top, topA);
+          int const widthB = std::max(left + width, leftA + widthA) - leftB;
+          int const heightB = std::max(top + height, topA + heightA) - topB;
+          return image.extract_area(leftB, topB, widthB, heightB);
+        } else {
+          // Use alpha only
+          return image.extract_area(leftA, topA, widthA, heightA);
+        }
       }
     }
-    return image.extract_area(left, top, width, height);
+    if (width > 0 && height > 0) {
+      return image.extract_area(left, top, width, height);
+    }
+    return image;
   }
 
   /*
    * Calculate (a * in + b)
    */
-  VImage Linear(VImage image, double const a, double const b) {
-    if (HasAlpha(image)) {
+  VImage Linear(VImage image, std::vector<double> const a, std::vector<double> const b) {
+    size_t const bands = static_cast<size_t>(image.bands());
+    if (a.size() > bands) {
+      throw VError("Band expansion using linear is unsupported");
+    }
+    bool const uchar = !Is16Bit(image.interpretation());
+    if (HasAlpha(image) && a.size() != bands && (a.size() == 1 || a.size() == bands - 1 || bands - 1 == 1)) {
       // Separate alpha channel
-      VImage alpha = image[image.bands() - 1];
-      return RemoveAlpha(image).linear(a, b).bandjoin(alpha);
+      VImage alpha = image[bands - 1];
+      return RemoveAlpha(image).linear(a, b, VImage::option()->set("uchar", uchar)).bandjoin(alpha);
     } else {
-      return image.linear(a, b);
+      return image.linear(a, b, VImage::option()->set("uchar", uchar));
     }
   }
+
+  /*
+   * Unflatten
+   */
+  VImage Unflatten(VImage image) {
+    if (HasAlpha(image)) {
+      VImage alpha = image[image.bands() - 1];
+      VImage noAlpha = RemoveAlpha(image);
+      return noAlpha.bandjoin(alpha & (noAlpha.colourspace(VIPS_INTERPRETATION_B_W) < 255));
+    } else {
+      return image.bandjoin(image.colourspace(VIPS_INTERPRETATION_B_W) < 255);
+    }
+  }
+
+  /*
+   * Ensure the image is in a given colourspace
+   */
+  VImage EnsureColourspace(VImage image, VipsInterpretation colourspace) {
+    if (colourspace != VIPS_INTERPRETATION_LAST && image.interpretation() != colourspace) {
+      image = image.colourspace(colourspace,
+        VImage::option()->set("source_space", image.interpretation()));
+    }
+    return image;
+  }
+
+  /*
+   * Split and crop each frame, reassemble, and update pageHeight.
+   */
+  VImage CropMultiPage(VImage image, int left, int top, int width, int height,
+                       int nPages, int *pageHeight) {
+    if (top == 0 && height == *pageHeight) {
+      // Fast path; no need to adjust the height of the multi-page image
+      return image.extract_area(left, 0, width, image.height());
+    } else {
+      std::vector<VImage> pages;
+      pages.reserve(nPages);
+
+      // Split the image into cropped frames
+      for (int i = 0; i < nPages; i++) {
+        pages.push_back(
+          image.extract_area(left, *pageHeight * i + top, width, height));
+      }
+
+      // Reassemble the frames into a tall, thin image
+      VImage assembled = VImage::arrayjoin(pages,
+        VImage::option()->set("across", 1));
+
+      // Update the page height
+      *pageHeight = height;
+
+      return assembled;
+    }
+  }
+
+  /*
+   * Split into frames, embed each frame, reassemble, and update pageHeight.
+   */
+  VImage EmbedMultiPage(VImage image, int left, int top, int width, int height,
+                        VipsExtend extendWith, std::vector<double> background, int nPages, int *pageHeight) {
+    if (top == 0 && height == *pageHeight) {
+      // Fast path; no need to adjust the height of the multi-page image
+      return image.embed(left, 0, width, image.height(), VImage::option()
+        ->set("extend", extendWith)
+        ->set("background", background));
+    } else if (left == 0 && width == image.width()) {
+      // Fast path; no need to adjust the width of the multi-page image
+      std::vector<VImage> pages;
+      pages.reserve(nPages);
+
+      // Rearrange the tall image into a vertical grid
+      image = image.grid(*pageHeight, nPages, 1);
+
+      // Do the embed on the wide image
+      image = image.embed(0, top, image.width(), height, VImage::option()
+        ->set("extend", extendWith)
+        ->set("background", background));
+
+      // Split the wide image into frames
+      for (int i = 0; i < nPages; i++) {
+        pages.push_back(
+          image.extract_area(width * i, 0, width, height));
+      }
+
+      // Reassemble the frames into a tall, thin image
+      VImage assembled = VImage::arrayjoin(pages,
+        VImage::option()->set("across", 1));
+
+      // Update the page height
+      *pageHeight = height;
+
+      return assembled;
+    } else {
+      std::vector<VImage> pages;
+      pages.reserve(nPages);
+
+      // Split the image into frames
+      for (int i = 0; i < nPages; i++) {
+        pages.push_back(
+          image.extract_area(0, *pageHeight * i, image.width(), *pageHeight));
+      }
+
+      // Embed each frame in the target size
+      for (int i = 0; i < nPages; i++) {
+        pages[i] = pages[i].embed(left, top, width, height, VImage::option()
+          ->set("extend", extendWith)
+          ->set("background", background));
+      }
+
+      // Reassemble the frames into a tall, thin image
+      VImage assembled = VImage::arrayjoin(pages,
+        VImage::option()->set("across", 1));
+
+      // Update the page height
+      *pageHeight = height;
+
+      return assembled;
+    }
+  }
+
 }  // namespace sharp

src/operations.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_OPERATIONS_H_
 #define SRC_OPERATIONS_H_
@@ -33,13 +22,28 @@ namespace sharp {
   /*
    * Stretch luminance to cover full dynamic range.
    */
-  VImage Normalise(VImage image);
+  VImage Normalise(VImage image, int const lower, int const upper);
+
+  /*
+   * Contrast limiting adapative histogram equalization (CLAHE)
+   */
+  VImage Clahe(VImage image, int const width, int const height, int const maxSlope);
 
   /*
    * Gamma encoding/decoding
    */
   VImage Gamma(VImage image, double const exponent);
 
+  /*
+   * Flatten image to remove alpha channel
+   */
+  VImage Flatten(VImage image, std::vector<double> flattenBackground);
+
+  /*
+   * Produce the "negative" of the image.
+   */
+  VImage Negate(VImage image, bool const negateAlpha);
+
   /*
    * Gaussian blur. Use sigma of -1.0 for fast blur.
    */
@@ -54,7 +58,8 @@ namespace sharp {
   /*
    * Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
    */
-  VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged);
+  VImage Sharpen(VImage image, double const sigma, double const m1, double const m2,
+    double const x1, double const y2, double const y3);
 
   /*
     Threshold an image
@@ -74,12 +79,17 @@ namespace sharp {
   /*
     Trim an image
   */
-  VImage Trim(VImage image, double const threshold);
+  VImage Trim(VImage image, std::vector<double> background, double const threshold);
 
   /*
    * Linear adjustment (a * in + b)
    */
-  VImage Linear(VImage image, double const a, double const b);
+  VImage Linear(VImage image, std::vector<double> const a,  std::vector<double> const b);
+
+  /*
+   * Unflatten
+   */
+  VImage Unflatten(VImage image);
 
   /*
    * Recomb with a Matrix of the given bands/channel size.
@@ -88,9 +98,27 @@ namespace sharp {
   VImage Recomb(VImage image, std::unique_ptr<double[]> const &matrix);
 
   /*
-   * Modulate brightness, saturation and hue
+   * Modulate brightness, saturation, hue and lightness
    */
-  VImage Modulate(VImage image, double const brightness, double const saturation, int const hue);
+  VImage Modulate(VImage image, double const brightness, double const saturation,
+                  int const hue, double const lightness);
+
+  /*
+   * Ensure the image is in a given colourspace
+   */
+  VImage EnsureColourspace(VImage image, VipsInterpretation colourspace);
+
+  /*
+   * Split and crop each frame, reassemble, and update pageHeight.
+   */
+  VImage CropMultiPage(VImage image, int left, int top, int width, int height,
+                       int nPages, int *pageHeight);
+
+  /*
+   * Split into frames, embed each frame, reassemble, and update pageHeight.
+   */
+  VImage EmbedMultiPage(VImage image, int left, int top, int width, int height,
+                        VipsExtend extendWith, std::vector<double> background, int nPages, int *pageHeight);
 
 }  // namespace sharp
 

src/pipeline.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_PIPELINE_H_
 #define SRC_PIPELINE_H_
@@ -18,6 +7,7 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <unordered_map>
 
 #include <napi.h>
 #include <vips/vips8>
@@ -26,20 +16,13 @@
 
 Napi::Value pipeline(const Napi::CallbackInfo& info);
 
-enum class Canvas {
-  CROP,
-  EMBED,
-  MAX,
-  MIN,
-  IGNORE_ASPECT
-};
-
 struct Composite {
   sharp::InputDescriptor *input;
   VipsBlendMode mode;
   int gravity;
   int left;
   int top;
+  bool hasOffset;
   bool tile;
   bool premultiplied;
 
@@ -47,8 +30,9 @@ struct Composite {
     input(nullptr),
     mode(VIPS_BLEND_MODE_OVER),
     gravity(0),
-    left(-1),
-    top(-1),
+    left(0),
+    top(0),
+    hasOffset(false),
     tile(false),
     premultiplied(false) {}
 };
@@ -72,40 +56,55 @@ struct PipelineBaton {
   int width;
   int height;
   int channels;
-  Canvas canvas;
+  VipsKernel kernel;
+  sharp::Canvas canvas;
   int position;
   std::vector<double> resizeBackground;
   bool hasCropOffset;
   int cropOffsetLeft;
   int cropOffsetTop;
+  bool hasAttentionCenter;
+  int attentionX;
+  int attentionY;
   bool premultiplied;
   bool tileCentre;
-  std::string kernel;
   bool fastShrinkOnLoad;
   double tintA;
   double tintB;
   bool flatten;
   std::vector<double> flattenBackground;
+  bool unflatten;
   bool negate;
+  bool negateAlpha;
   double blurSigma;
   double brightness;
   double saturation;
   int hue;
+  double lightness;
   int medianSize;
   double sharpenSigma;
-  double sharpenFlat;
-  double sharpenJagged;
+  double sharpenM1;
+  double sharpenM2;
+  double sharpenX1;
+  double sharpenY2;
+  double sharpenY3;
   int threshold;
   bool thresholdGrayscale;
+  std::vector<double> trimBackground;
   double trimThreshold;
   int trimOffsetLeft;
   int trimOffsetTop;
-  double linearA;
-  double linearB;
+  std::vector<double> linearA;
+  std::vector<double> linearB;
   double gamma;
   double gammaOut;
   bool greyscale;
   bool normalise;
+  int normaliseLower;
+  int normaliseUpper;
+  int claheWidth;
+  int claheHeight;
+  int claheMaxSlope;
   bool useExifOrientation;
   int angle;
   double rotationAngle;
@@ -118,14 +117,16 @@ struct PipelineBaton {
   int extendLeft;
   int extendRight;
   std::vector<double> extendBackground;
+  VipsExtend extendWith;
   bool withoutEnlargement;
+  bool withoutReduction;
   std::vector<double> affineMatrix;
   std::vector<double> affineBackground;
   double affineIdx;
   double affineIdy;
   double affineOdx;
   double affineOdy;
-  vips::VInterpolate affineInterpolator;
+  std::string affineInterpolator;
   int jpegQuality;
   bool jpegProgressive;
   std::string jpegChromaSubsampling;
@@ -139,14 +140,30 @@ struct PipelineBaton {
   bool pngAdaptiveFiltering;
   bool pngPalette;
   int pngQuality;
-  int pngColours;
+  int pngEffort;
+  int pngBitdepth;
   double pngDither;
+  int jp2Quality;
+  bool jp2Lossless;
+  int jp2TileHeight;
+  int jp2TileWidth;
+  std::string jp2ChromaSubsampling;
   int webpQuality;
   int webpAlphaQuality;
   bool webpNearLossless;
   bool webpLossless;
   bool webpSmartSubsample;
-  int webpReductionEffort;
+  VipsForeignWebpPreset webpPreset;
+  int webpEffort;
+  bool webpMinSize;
+  bool webpMixed;
+  int gifBitdepth;
+  int gifEffort;
+  double gifDither;
+  double gifInterFrameMaxError;
+  double gifInterPaletteMaxError;
+  bool gifReuse;
+  bool gifProgressive;
   int tiffQuality;
   VipsForeignTiffCompression tiffCompression;
   VipsForeignTiffPredictor tiffPredictor;
@@ -157,13 +174,24 @@ struct PipelineBaton {
   int tiffTileWidth;
   double tiffXres;
   double tiffYres;
+  VipsForeignTiffResunit tiffResolutionUnit;
   int heifQuality;
   VipsForeignHeifCompression heifCompression;
+  int heifEffort;
+  std::string heifChromaSubsampling;
   bool heifLossless;
+  double jxlDistance;
+  int jxlDecodingTier;
+  int jxlEffort;
+  bool jxlLossless;
+  VipsBandFormat rawDepth;
   std::string err;
   bool withMetadata;
   int withMetadataOrientation;
+  double withMetadataDensity;
   std::string withMetadataIcc;
+  std::unordered_map<std::string, std::string> withMetadataStrs;
+  int timeoutSeconds;
   std::unique_ptr<double[]> convKernel;
   int convKernelWidth;
   int convKernelHeight;
@@ -174,9 +202,9 @@ struct PipelineBaton {
   VipsOperationBoolean bandBoolOp;
   int extractChannel;
   bool removeAlpha;
-  bool ensureAlpha;
+  double ensureAlpha;
+  VipsInterpretation colourspaceInput;
   VipsInterpretation colourspace;
-  int pageHeight;
   std::vector<int> delay;
   int loop;
   int tileSize;
@@ -188,6 +216,8 @@ struct PipelineBaton {
   std::vector<double> tileBackground;
   int tileSkipBlanks;
   VipsForeignDzDepth tileDepth;
+  std::string tileId;
+  std::string tileBasename;
   std::unique_ptr<double[]> recombMatrix;
 
   PipelineBaton():
@@ -196,36 +226,52 @@ struct PipelineBaton {
     topOffsetPre(-1),
     topOffsetPost(-1),
     channels(0),
-    canvas(Canvas::CROP),
+    kernel(VIPS_KERNEL_LANCZOS3),
+    canvas(sharp::Canvas::CROP),
     position(0),
     resizeBackground{ 0.0, 0.0, 0.0, 255.0 },
     hasCropOffset(false),
     cropOffsetLeft(0),
     cropOffsetTop(0),
+    hasAttentionCenter(false),
+    attentionX(0),
+    attentionY(0),
     premultiplied(false),
     tintA(128.0),
     tintB(128.0),
     flatten(false),
     flattenBackground{ 0.0, 0.0, 0.0 },
+    unflatten(false),
     negate(false),
+    negateAlpha(true),
     blurSigma(0.0),
     brightness(1.0),
     saturation(1.0),
     hue(0),
+    lightness(0),
     medianSize(0),
     sharpenSigma(0.0),
-    sharpenFlat(1.0),
-    sharpenJagged(2.0),
+    sharpenM1(1.0),
+    sharpenM2(2.0),
+    sharpenX1(2.0),
+    sharpenY2(10.0),
+    sharpenY3(20.0),
     threshold(0),
     thresholdGrayscale(true),
+    trimBackground{},
     trimThreshold(0.0),
     trimOffsetLeft(0),
     trimOffsetTop(0),
-    linearA(1.0),
-    linearB(0.0),
+    linearA{},
+    linearB{},
     gamma(0.0),
     greyscale(false),
     normalise(false),
+    normaliseLower(1),
+    normaliseUpper(99),
+    claheWidth(0),
+    claheHeight(0),
+    claheMaxSlope(3),
     useExifOrientation(false),
     angle(0),
     rotationAngle(0.0),
@@ -237,14 +283,16 @@ struct PipelineBaton {
     extendLeft(0),
     extendRight(0),
     extendBackground{ 0.0, 0.0, 0.0, 255.0 },
+    extendWith(VIPS_EXTEND_BACKGROUND),
     withoutEnlargement(false),
+    withoutReduction(false),
     affineMatrix{ 1.0, 0.0, 0.0, 1.0 },
     affineBackground{ 0.0, 0.0, 0.0, 255.0 },
     affineIdx(0),
     affineIdy(0),
     affineOdx(0),
     affineOdy(0),
-    affineInterpolator(vips::VInterpolate::new_from_name("bicubic")),
+    affineInterpolator("bicubic"),
     jpegQuality(80),
     jpegProgressive(false),
     jpegChromaSubsampling("4:2:0"),
@@ -254,18 +302,34 @@ struct PipelineBaton {
     jpegOptimiseScans(false),
     jpegOptimiseCoding(true),
     pngProgressive(false),
-    pngCompressionLevel(9),
+    pngCompressionLevel(6),
     pngAdaptiveFiltering(false),
     pngPalette(false),
     pngQuality(100),
-    pngColours(256),
+    pngEffort(7),
+    pngBitdepth(8),
     pngDither(1.0),
+    jp2Quality(80),
+    jp2Lossless(false),
+    jp2TileHeight(512),
+    jp2TileWidth(512),
+    jp2ChromaSubsampling("4:4:4"),
     webpQuality(80),
     webpAlphaQuality(100),
     webpNearLossless(false),
     webpLossless(false),
     webpSmartSubsample(false),
-    webpReductionEffort(4),
+    webpPreset(VIPS_FOREIGN_WEBP_PRESET_DEFAULT),
+    webpEffort(4),
+    webpMinSize(false),
+    webpMixed(false),
+    gifBitdepth(8),
+    gifEffort(7),
+    gifDither(1.0),
+    gifInterFrameMaxError(0.0),
+    gifInterPaletteMaxError(3.0),
+    gifReuse(true),
+    gifProgressive(false),
     tiffQuality(80),
     tiffCompression(VIPS_FOREIGN_TIFF_COMPRESSION_JPEG),
     tiffPredictor(VIPS_FOREIGN_TIFF_PREDICTOR_HORIZONTAL),
@@ -276,11 +340,21 @@ struct PipelineBaton {
     tiffTileWidth(256),
     tiffXres(1.0),
     tiffYres(1.0),
-    heifQuality(80),
-    heifCompression(VIPS_FOREIGN_HEIF_COMPRESSION_HEVC),
+    tiffResolutionUnit(VIPS_FOREIGN_TIFF_RESUNIT_INCH),
+    heifQuality(50),
+    heifCompression(VIPS_FOREIGN_HEIF_COMPRESSION_AV1),
+    heifEffort(4),
+    heifChromaSubsampling("4:4:4"),
     heifLossless(false),
+    jxlDistance(1.0),
+    jxlDecodingTier(0),
+    jxlEffort(7),
+    jxlLossless(false),
+    rawDepth(VIPS_FORMAT_UCHAR),
     withMetadata(false),
     withMetadataOrientation(-1),
+    withMetadataDensity(0.0),
+    timeoutSeconds(0),
     convKernelWidth(0),
     convKernelHeight(0),
     convKernelScale(0.0),
@@ -290,10 +364,9 @@ struct PipelineBaton {
     bandBoolOp(VIPS_OPERATION_BOOLEAN_LAST),
     extractChannel(-1),
     removeAlpha(false),
-    ensureAlpha(false),
+    ensureAlpha(-1.0),
+    colourspaceInput(VIPS_INTERPRETATION_LAST),
     colourspace(VIPS_INTERPRETATION_LAST),
-    pageHeight(0),
-    delay{-1},
     loop(-1),
     tileSize(256),
     tileOverlap(0),

src/sharp.cc

@@ -1,16 +1,7 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+#include <mutex>  // NOLINT(build/c++11)
 
 #include <napi.h>
 #include <vips/vips8>
@@ -21,14 +12,11 @@
 #include "utilities.h"
 #include "stats.h"
 
-static void* sharp_vips_init(void*) {
-  vips_init("sharp");
-  return nullptr;
-}
-
 Napi::Object init(Napi::Env env, Napi::Object exports) {
-  static GOnce sharp_vips_init_once = G_ONCE_INIT;
-  g_once(&sharp_vips_init_once, static_cast<GThreadFunc>(sharp_vips_init), nullptr);
+  static std::once_flag sharp_vips_init_once;
+  std::call_once(sharp_vips_init_once, []() {
+    vips_init("sharp");
+  });
 
   g_log_set_handler("VIPS", static_cast<GLogLevelFlags>(G_LOG_LEVEL_WARNING),
     static_cast<GLogFunc>(sharp::VipsWarningCallback), nullptr);
@@ -42,7 +30,9 @@ Napi::Object init(Napi::Env env, Napi::Object exports) {
   exports.Set("simd", Napi::Function::New(env, simd));
   exports.Set("libvipsVersion", Napi::Function::New(env, libvipsVersion));
   exports.Set("format", Napi::Function::New(env, format));
+  exports.Set("block", Napi::Function::New(env, block));
   exports.Set("_maxColourDistance", Napi::Function::New(env, _maxColourDistance));
+  exports.Set("_isUsingJemalloc", Napi::Function::New(env, _isUsingJemalloc));
   exports.Set("stats", Napi::Function::New(env, stats));
   return exports;
 }

src/stats.cc

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #include <numeric>
 #include <vector>
@@ -41,7 +30,7 @@ class StatsWorker : public Napi::AsyncWorker {
 
   void Execute() {
     // Decrement queued task counter
-    g_atomic_int_dec_and_test(&sharp::counterQueue);
+    sharp::counterQueue--;
 
     vips::VImage image;
     sharp::ImageType imageType = sharp::ImageType::UNKNOWN;
@@ -117,7 +106,7 @@ class StatsWorker : public Napi::AsyncWorker {
     // Handle warnings
     std::string warning = sharp::VipsWarningPop();
     while (!warning.empty()) {
-      debuglog.Call({ Napi::String::New(env, warning) });
+      debuglog.MakeCallback(Receiver().Value(), { Napi::String::New(env, warning) });
       warning = sharp::VipsWarningPop();
     }
 
@@ -154,7 +143,7 @@ class StatsWorker : public Napi::AsyncWorker {
       info.Set("dominant", dominant);
       Callback().MakeCallback(Receiver().Value(), { env.Null(), info });
     } else {
-      Callback().MakeCallback(Receiver().Value(), { Napi::Error::New(env, baton->err).Value() });
+      Callback().MakeCallback(Receiver().Value(), { Napi::Error::New(env, sharp::TrimEnd(baton->err)).Value() });
     }
 
     delete baton->input;
@@ -172,22 +161,23 @@ class StatsWorker : public Napi::AsyncWorker {
 Napi::Value stats(const Napi::CallbackInfo& info) {
   // V8 objects are converted to non-V8 types held in the baton struct
   StatsBaton *baton = new StatsBaton;
-  Napi::Object options = info[0].As<Napi::Object>();
+  Napi::Object options = info[size_t(0)].As<Napi::Object>();
 
   // Input
   baton->input = sharp::CreateInputDescriptor(options.Get("input").As<Napi::Object>());
+  baton->input->access = VIPS_ACCESS_RANDOM;
 
   // Function to notify of libvips warnings
   Napi::Function debuglog = options.Get("debuglog").As<Napi::Function>();
 
   // Join queue for worker thread
-  Napi::Function callback = info[1].As<Napi::Function>();
+  Napi::Function callback = info[size_t(1)].As<Napi::Function>();
   StatsWorker *worker = new StatsWorker(callback, baton, debuglog);
   worker->Receiver().Set("options", options);
   worker->Queue();
 
   // Increment queued task counter
-  g_atomic_int_inc(&sharp::counterQueue);
+  sharp::counterQueue++;
 
   return info.Env().Undefined();
 }

src/stats.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_STATS_H_
 #define SRC_STATS_H_

src/utilities.cc

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #include <cmath>
 #include <string>
@@ -30,16 +19,16 @@ Napi::Value cache(const Napi::CallbackInfo& info) {
   Napi::Env env = info.Env();
 
   // Set memory limit
-  if (info[0].IsNumber()) {
-    vips_cache_set_max_mem(info[0].As<Napi::Number>().Int32Value() * 1048576);
+  if (info[size_t(0)].IsNumber()) {
+    vips_cache_set_max_mem(info[size_t(0)].As<Napi::Number>().Int32Value() * 1048576);
   }
   // Set file limit
-  if (info[1].IsNumber()) {
-    vips_cache_set_max_files(info[1].As<Napi::Number>().Int32Value());
+  if (info[size_t(1)].IsNumber()) {
+    vips_cache_set_max_files(info[size_t(1)].As<Napi::Number>().Int32Value());
   }
   // Set items limit
-  if (info[2].IsNumber()) {
-    vips_cache_set_max(info[2].As<Napi::Number>().Int32Value());
+  if (info[size_t(2)].IsNumber()) {
+    vips_cache_set_max(info[size_t(2)].As<Napi::Number>().Int32Value());
   }
 
   // Get memory stats
@@ -69,8 +58,8 @@ Napi::Value cache(const Napi::CallbackInfo& info) {
 */
 Napi::Value concurrency(const Napi::CallbackInfo& info) {
   // Set concurrency
-  if (info[0].IsNumber()) {
-    vips_concurrency_set(info[0].As<Napi::Number>().Int32Value());
+  if (info[size_t(0)].IsNumber()) {
+    vips_concurrency_set(info[size_t(0)].As<Napi::Number>().Int32Value());
   }
   // Get concurrency
   return Napi::Number::New(info.Env(), vips_concurrency_get());
@@ -81,8 +70,8 @@ Napi::Value concurrency(const Napi::CallbackInfo& info) {
 */
 Napi::Value counters(const Napi::CallbackInfo& info) {
   Napi::Object counters = Napi::Object::New(info.Env());
-  counters.Set("queue", sharp::counterQueue);
-  counters.Set("process", sharp::counterProcess);
+  counters.Set("queue", static_cast<int>(sharp::counterQueue));
+  counters.Set("process", static_cast<int>(sharp::counterProcess));
   return counters;
 }
 
@@ -91,8 +80,8 @@ Napi::Value counters(const Napi::CallbackInfo& info) {
 */
 Napi::Value simd(const Napi::CallbackInfo& info) {
   // Set state
-  if (info[0].IsBoolean()) {
-    vips_vector_set_enabled(info[0].As<Napi::Boolean>().Value());
+  if (info[size_t(0)].IsBoolean()) {
+    vips_vector_set_enabled(info[size_t(0)].As<Napi::Boolean>().Value());
   }
   // Get state
   return Napi::Boolean::New(info.Env(), vips_vector_isenabled());
@@ -115,17 +104,28 @@ Napi::Value format(const Napi::CallbackInfo& info) {
   Napi::Object format = Napi::Object::New(env);
   for (std::string const f : {
     "jpeg", "png", "webp", "tiff", "magick", "openslide", "dz",
-    "ppm", "fits", "gif", "svg", "heif", "pdf", "vips"
+    "ppm", "fits", "gif", "svg", "heif", "pdf", "vips", "jp2k", "jxl"
   }) {
     // Input
-    Napi::Boolean hasInputFile =
-      Napi::Boolean::New(env, vips_type_find("VipsOperation", (f + "load").c_str()));
+    const VipsObjectClass *oc = vips_class_find("VipsOperation", (f + "load").c_str());
+    Napi::Boolean hasInputFile = Napi::Boolean::New(env, oc);
     Napi::Boolean hasInputBuffer =
       Napi::Boolean::New(env, vips_type_find("VipsOperation", (f + "load_buffer").c_str()));
     Napi::Object input = Napi::Object::New(env);
     input.Set("file", hasInputFile);
     input.Set("buffer", hasInputBuffer);
     input.Set("stream", hasInputBuffer);
+    if (hasInputFile) {
+      const VipsForeignClass *fc = VIPS_FOREIGN_CLASS(oc);
+      if (fc->suffs) {
+        Napi::Array fileSuffix = Napi::Array::New(env);
+        const char **suffix = fc->suffs;
+        for (int i = 0; *suffix; i++, suffix++) {
+          fileSuffix.Set(i, Napi::String::New(env, *suffix));
+        }
+        input.Set("fileSuffix", fileSuffix);
+      }
+    }
     // Output
     Napi::Boolean hasOutputFile =
       Napi::Boolean::New(env, vips_type_find("VipsOperation", (f + "save").c_str()));
@@ -164,6 +164,17 @@ Napi::Value format(const Napi::CallbackInfo& info) {
   return format;
 }
 
+/*
+  (Un)block libvips operations at runtime.
+*/
+void block(const Napi::CallbackInfo& info) {
+  Napi::Array ops = info[size_t(0)].As<Napi::Array>();
+  bool const state = info[size_t(1)].As<Napi::Boolean>().Value();
+  for (unsigned int i = 0; i < ops.Length(); i++) {
+    vips_operation_block_set(ops.Get(i).As<Napi::String>().Utf8Value().c_str(), state);
+  }
+}
+
 /*
   Synchronous, internal-only method used by some of the functional tests.
   Calculates the maximum colour distance using the DE2000 algorithm
@@ -174,10 +185,10 @@ Napi::Value _maxColourDistance(const Napi::CallbackInfo& info) {
 
   // Open input files
   VImage image1;
-  sharp::ImageType imageType1 = sharp::DetermineImageType(info[0].As<Napi::String>().Utf8Value().data());
+  sharp::ImageType imageType1 = sharp::DetermineImageType(info[size_t(0)].As<Napi::String>().Utf8Value().data());
   if (imageType1 != sharp::ImageType::UNKNOWN) {
     try {
-      image1 = VImage::new_from_file(info[0].As<Napi::String>().Utf8Value().c_str());
+      image1 = VImage::new_from_file(info[size_t(0)].As<Napi::String>().Utf8Value().c_str());
     } catch (...) {
       throw Napi::Error::New(env, "Input file 1 has corrupt header");
     }
@@ -185,10 +196,10 @@ Napi::Value _maxColourDistance(const Napi::CallbackInfo& info) {
     throw Napi::Error::New(env, "Input file 1 is of an unsupported image format");
   }
   VImage image2;
-  sharp::ImageType imageType2 = sharp::DetermineImageType(info[1].As<Napi::String>().Utf8Value().data());
+  sharp::ImageType imageType2 = sharp::DetermineImageType(info[size_t(1)].As<Napi::String>().Utf8Value().data());
   if (imageType2 != sharp::ImageType::UNKNOWN) {
     try {
-      image2 = VImage::new_from_file(info[1].As<Napi::String>().Utf8Value().c_str());
+      image2 = VImage::new_from_file(info[size_t(1)].As<Napi::String>().Utf8Value().c_str());
     } catch (...) {
       throw Napi::Error::New(env, "Input file 2 has corrupt header");
     }
@@ -225,3 +236,19 @@ Napi::Value _maxColourDistance(const Napi::CallbackInfo& info) {
 
   return Napi::Number::New(env, maxColourDistance);
 }
+
+#if defined(__GNUC__)
+// mallctl will be resolved by the runtime linker when jemalloc is being used
+extern "C" {
+  int mallctl(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen) __attribute__((weak));
+}
+Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  return Napi::Boolean::New(env, mallctl != nullptr);
+}
+#else
+Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  return Napi::Boolean::New(env, false);
+}
+#endif

src/utilities.h

@@ -1,16 +1,5 @@
-// Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Lovell Fuller and contributors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef SRC_UTILITIES_H_
 #define SRC_UTILITIES_H_
@@ -23,6 +12,8 @@ Napi::Value counters(const Napi::CallbackInfo& info);
 Napi::Value simd(const Napi::CallbackInfo& info);
 Napi::Value libvipsVersion(const Napi::CallbackInfo& info);
 Napi::Value format(const Napi::CallbackInfo& info);
+void block(const Napi::CallbackInfo& info);
 Napi::Value _maxColourDistance(const Napi::CallbackInfo& info);
+Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info);
 
 #endif  // SRC_UTILITIES_H_

test/beforeEach.js

@@ -0,0 +1,24 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
+'use strict';
+
+const sharp = require('../');
+
+const usingCache = !process.env.G_DEBUG;
+const usingSimd = !process.env.VIPS_NOVECTOR;
+const concurrency = Number(process.env.VIPS_CONCURRENCY) || 0;
+
+exports.mochaHooks = {
+  beforeEach () {
+    sharp.cache(usingCache);
+    sharp.simd(usingSimd);
+    sharp.concurrency(concurrency);
+  },
+
+  afterEach () {
+    if (global.gc) {
+      global.gc();
+    }
+  }
+};

test/bench/Dockerfile

@@ -0,0 +1,31 @@
+FROM ubuntu:22.04
+ARG BRANCH=main
+
+# Install basic dependencies
+RUN apt-get -y update && apt-get install -y build-essential curl git
+
+# Install latest Node.js LTS
+RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
+RUN apt-get install -y nodejs
+
+# Install benchmark dependencies
+RUN apt-get install -y imagemagick libmagick++-dev graphicsmagick
+
+# Install sharp
+RUN mkdir /tmp/sharp
+RUN cd /tmp && git clone --single-branch --branch $BRANCH https://github.com/lovell/sharp.git
+RUN cd /tmp/sharp && npm install --build-from-source
+
+# Install benchmark test
+RUN cd /tmp/sharp/test/bench && npm install --omit optional
+
+RUN cat /etc/os-release | grep VERSION=
+RUN node -v
+
+WORKDIR /tmp/sharp/test/bench
+
+# Workaround for: https://github.com/emscripten-core/emscripten/pull/16917
+# This could be removed once Squoosh is an optional dependency.
+ENV NODE_OPTIONS="--no-experimental-fetch"
+
+CMD [ "node", "perf" ]

test/bench/package.json

@@ -7,17 +7,18 @@
   "scripts": {
     "test": "node perf && node random && node parallel"
   },
-  "devDependencies": {
-    "async": "^3.1.0",
-    "benchmark": "^2.1.4",
-    "gm": "^1.23.1",
-    "imagemagick": "^0.1.3",
-    "jimp": "^0.16.0",
-    "mapnik": "^4.5.2",
-    "semver": "^7.1.1"
+  "dependencies": {
+    "@squoosh/cli": "0.7.3",
+    "@squoosh/lib": "0.5.3",
+    "async": "3.2.4",
+    "benchmark": "2.1.4",
+    "gm": "1.25.0",
+    "imagemagick": "0.1.3",
+    "jimp": "0.22.10"
   },
-  "license": "Apache-2.0",
-  "engines": {
-    "node": ">=10.16.0"
-  }
+  "optionalDependencies": {
+    "@tensorflow/tfjs-node": "4.11.0",
+    "mapnik": "4.5.9"
+  },
+  "license": "Apache-2.0"
 }

test/bench/parallel.js

@@ -1,3 +1,6 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
 process.env.UV_THREADPOOL_SIZE = 64;

test/bench/perf.js

@@ -1,26 +1,50 @@
+// Copyright 2013 Lovell Fuller and others.
+// SPDX-License-Identifier: Apache-2.0
+
 'use strict';
 
+const os = require('os');
 const fs = require('fs');
+const { exec, execSync } = require('child_process');
 
 const async = require('async');
-const assert = require('assert');
 const Benchmark = require('benchmark');
 
+const safeRequire = (name) => {
+  try {
+    return require(name);
+  } catch (err) {}
+  return null;
+};
+
 // Contenders
 const sharp = require('../../');
 const gm = require('gm');
 const imagemagick = require('imagemagick');
-const mapnik = require('mapnik');
+const mapnik = safeRequire('mapnik');
 const jimp = require('jimp');
+const squoosh = require('@squoosh/lib');
+process.env.TF_CPP_MIN_LOG_LEVEL = 1;
+const tfjs = safeRequire('@tensorflow/tfjs-node');
 
 const fixtures = require('../fixtures');
 
+const outputJpg = fixtures.path('output.jpg');
+const outputPng = fixtures.path('output.png');
+const outputWebP = fixtures.path('output.webp');
+
 const width = 720;
 const height = 588;
+const heightPng = 540;
 
 // Disable libvips cache to ensure tests are as fair as they can be
 sharp.cache(false);
 
+// Spawn one thread per physical CPU core
+const physicalCores = Number(execSync('lscpu -p | egrep -v "^#" | sort -u -t, -k 2,4 | wc -l', { encoding: 'utf-8' }).trim());
+console.log(`Detected ${physicalCores} physical cores`);
+sharp.concurrency(physicalCores);
+
 async.series({
   jpeg: function (callback) {
     const inputJpgBuffer = fs.readFileSync(fixtures.inputJpg);
@@ -56,7 +80,7 @@ async.series({
             image
               .resize(width, height, jimp.RESIZE_BICUBIC)
               .quality(80)
-              .write(fixtures.outputJpg, function (err) {
+              .write(outputJpg, function (err) {
                 if (err) {
                   throw err;
                 } else {
@@ -67,8 +91,67 @@ async.series({
         });
       }
     });
+    // squoosh-cli
+    jpegSuite.add('squoosh-cli-file-file', {
+      defer: true,
+      fn: function (deferred) {
+        exec(`./node_modules/.bin/squoosh-cli \
+          --output-dir ${os.tmpdir()} \
+          --resize '{"enabled":true,"width":${width},"height":${height},"method":"lanczos3","premultiply":false,"linearRGB":false}' \
+          --mozjpeg '{"quality":80,"progressive":false,"optimize_coding":true,"quant_table":0,"trellis_multipass":false,"chroma_subsample":2,"separate_chroma_quality":false}' \
+          "${fixtures.inputJpg}"`, function (err) {
+          if (err) {
+            throw err;
+          }
+          deferred.resolve();
+        });
+      }
+    });
+    // squoosh-lib (GPLv3)
+    jpegSuite.add('squoosh-lib-buffer-buffer', {
+      defer: true,
+      fn: function (deferred) {
+        const pool = new squoosh.ImagePool(os.cpus().length);
+        const image = pool.ingestImage(inputJpgBuffer);
+        image.decoded
+          .then(function () {
+            return image.preprocess({
+              resize: {
+                enabled: true,
+                width,
+                height,
+                method: 'lanczos3',
+                premultiply: false,
+                linearRGB: false
+              }
+            });
+          })
+          .then(function () {
+            return image.encode({
+              mozjpeg: {
+                quality: 80,
+                progressive: false,
+                optimize_coding: true,
+                quant_table: 0,
+                trellis_multipass: false,
+                chroma_subsample: 2,
+                separate_chroma_quality: false
+              }
+            });
+          })
+          .then(function () {
+            return pool.close();
+          })
+          .then(function () {
+            return image.encodedWith.mozjpeg;
+          })
+          .then(function () {
+            deferred.resolve();
+          });
+      }
+    });
     // mapnik
-    jpegSuite.add('mapnik-file-file', {
+    mapnik && jpegSuite.add('mapnik-file-file', {
       defer: true,
       fn: function (deferred) {
         mapnik.Image.open(fixtures.inputJpg, function (err, img) {
@@ -77,7 +160,7 @@ async.series({
             .resize(width, height, {
               scaling_method: mapnik.imageScaling.lanczos
             })
-            .save(fixtures.outputJpg, 'jpeg:quality=80', function (err) {
+            .save(outputJpg, 'jpeg:quality=80', function (err) {
               if (err) throw err;
               deferred.resolve();
             });
@@ -105,10 +188,10 @@ async.series({
       fn: function (deferred) {
         imagemagick.resize({
           srcPath: fixtures.inputJpg,
-          dstPath: fixtures.outputJpg,
+          dstPath: outputJpg,
           quality: 0.8,
-          width: width,
-          height: height,
+          width,
+          height,
           format: 'jpg',
           filter: 'Lanczos'
         }, function (err) {
@@ -128,7 +211,7 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .write(fixtures.outputJpg, function (err) {
+          .write(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -143,11 +226,10 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -159,7 +241,7 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .write(fixtures.outputJpg, function (err) {
+          .write(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -174,23 +256,40 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
       }
     });
+    // tfjs
+    tfjs && jpegSuite.add('tfjs-node-buffer-buffer', {
+      defer: true,
+      fn: function (deferred) {
+        const decoded = tfjs.node.decodeJpeg(inputJpgBuffer);
+        const resized = tfjs.image.resizeBilinear(decoded, [height, width]);
+        tfjs
+          .node
+          .encodeJpeg(resized, 'rgb', 80)
+          .then(function () {
+            deferred.resolve();
+            tfjs.disposeVariables();
+          })
+          .catch(function (err) {
+            throw err;
+          });
+      }
+    });
     // sharp
     jpegSuite.add('sharp-buffer-file', {
       defer: true,
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height)
-          .toFile(fixtures.outputJpg, function (err) {
+          .toFile(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -203,11 +302,10 @@ async.series({
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -217,7 +315,7 @@ async.series({
       fn: function (deferred) {
         sharp(fixtures.inputJpg)
           .resize(width, height)
-          .toFile(fixtures.outputJpg, function (err) {
+          .toFile(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -229,7 +327,7 @@ async.series({
       defer: true,
       fn: function (deferred) {
         const readable = fs.createReadStream(fixtures.inputJpg);
-        const writable = fs.createWriteStream(fixtures.outputJpg);
+        const writable = fs.createWriteStream(outputJpg);
         writable.on('finish', function () {
           deferred.resolve();
         });
@@ -242,11 +340,10 @@ async.series({
       fn: function (deferred) {
         sharp(fixtures.inputJpg)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -257,8 +354,7 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .toBuffer()
-          .then(function (buffer) {
-            assert.notStrictEqual(null, buffer);
+          .then(function () {
             deferred.resolve();
           })
           .catch(function (err) {
@@ -281,11 +377,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .sharpen()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -296,11 +391,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .sharpen(3, 1, 3)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -311,11 +405,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .blur()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -326,11 +419,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .blur(3)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -341,11 +433,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .gamma()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -356,11 +447,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .normalise()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -371,11 +461,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .greyscale()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -387,11 +476,10 @@ async.series({
           .resize(width, height)
           .gamma()
           .greyscale()
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -402,11 +490,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .jpeg({ progressive: true })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -417,11 +504,10 @@ async.series({
         sharp(inputJpgBuffer)
           .resize(width, height)
           .jpeg({ chromaSubsampling: '4:4:4' })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -432,11 +518,10 @@ async.series({
         sharp(inputJpgBuffer)
           .rotate(90)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -447,26 +532,24 @@ async.series({
         sharp.simd(false);
         sharp(inputJpgBuffer)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             sharp.simd(true);
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
       }
-    }).add('sharp-sequentialRead', {
+    }).add('sharp-random-access-read', {
       defer: true,
       fn: function (deferred) {
-        sharp(inputJpgBuffer, { sequentialRead: true })
+        sharp(inputJpgBuffer, { sequentialRead: false })
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -479,11 +562,10 @@ async.series({
             fit: 'cover',
             position: sharp.strategy.entropy
           })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -496,11 +578,10 @@ async.series({
             fit: 'cover',
             position: sharp.strategy.attention
           })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -519,11 +600,10 @@ async.series({
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height, { kernel: 'cubic' })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -533,11 +613,10 @@ async.series({
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height, { kernel: 'lanczos2' })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -547,11 +626,10 @@ async.series({
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height, { kernel: 'lanczos3' })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -576,7 +654,7 @@ async.series({
             throw err;
           } else {
             image
-              .resize(width, height)
+              .resize(width, heightPng, jimp.RESIZE_BICUBIC)
               .deflateLevel(6)
               .filterType(0)
               .getBuffer(jimp.MIME_PNG, function (err) {
@@ -597,10 +675,10 @@ async.series({
             throw err;
           } else {
             image
-              .resize(width, height)
+              .resize(width, heightPng, jimp.RESIZE_BICUBIC)
               .deflateLevel(6)
               .filterType(0)
-              .write(fixtures.outputPng, function (err) {
+              .write(outputPng, function (err) {
                 if (err) {
                   throw err;
                 } else {
@@ -611,21 +689,74 @@ async.series({
         });
       }
     });
+    // squoosh-cli
+    pngSuite.add('squoosh-cli-file-file', {
+      defer: true,
+      fn: function (deferred) {
+        exec(`./node_modules/.bin/squoosh-cli \
+          --output-dir ${os.tmpdir()} \
+          --resize '{"enabled":true,"width":${width},"height":${heightPng},"method":"lanczos3","premultiply":true,"linearRGB":false}' \
+          --oxipng '{"level":1}' \
+          "${fixtures.inputPngAlphaPremultiplicationLarge}"`, function (err) {
+          if (err) {
+            throw err;
+          }
+          deferred.resolve();
+        });
+      }
+    });
+    // squoosh-lib (GPLv3)
+    pngSuite.add('squoosh-lib-buffer-buffer', {
+      defer: true,
+      fn: function (deferred) {
+        const pool = new squoosh.ImagePool(os.cpus().length);
+        const image = pool.ingestImage(inputPngBuffer);
+        image.decoded
+          .then(function () {
+            return image.preprocess({
+              resize: {
+                enabled: true,
+                width,
+                height: heightPng,
+                method: 'lanczos3',
+                premultiply: true,
+                linearRGB: false
+              }
+            });
+          })
+          .then(function () {
+            return image.encode({
+              oxipng: {
+                level: 1
+              }
+            });
+          })
+          .then(function () {
+            return pool.close();
+          })
+          .then(function () {
+            return image.encodedWith.oxipng;
+          })
+          .then(function () {
+            deferred.resolve();
+          });
+      }
+    });
     // mapnik
-    pngSuite.add('mapnik-file-file', {
+    mapnik && pngSuite.add('mapnik-file-file', {
       defer: true,
       fn: function (deferred) {
         mapnik.Image.open(fixtures.inputPngAlphaPremultiplicationLarge, function (err, img) {
           if (err) throw err;
           img.premultiply(function (err, img) {
             if (err) throw err;
-            img.resize(width, height, {
+            img.resize(width, heightPng, {
               scaling_method: mapnik.imageScaling.lanczos
             }, function (err, img) {
               if (err) throw err;
               img.demultiply(function (err, img) {
                 if (err) throw err;
-                img.save(fixtures.outputPng, 'png', function (err) {
+                img.save(outputPng, 'png32:f=no:z=6', function (err) {
                   if (err) throw err;
                   deferred.resolve();
                 });
@@ -641,13 +772,13 @@ async.series({
           if (err) throw err;
           img.premultiply(function (err, img) {
             if (err) throw err;
-            img.resize(width, height, {
+            img.resize(width, heightPng, {
               scaling_method: mapnik.imageScaling.lanczos
             }, function (err, img) {
               if (err) throw err;
               img.demultiply(function (err, img) {
                 if (err) throw err;
-                img.encode('png', function (err) {
+                img.encode('png32:f=no:z=6', function (err) {
                   if (err) throw err;
                   deferred.resolve();
                 });
@@ -663,9 +794,9 @@ async.series({
       fn: function (deferred) {
         imagemagick.resize({
           srcPath: fixtures.inputPngAlphaPremultiplicationLarge,
-          dstPath: fixtures.outputPng,
-          width: width,
-          height: height,
+          dstPath: outputPng,
+          width,
+          height: heightPng,
           filter: 'Lanczos',
           customArgs: [
             '-define', 'PNG:compression-level=6',
@@ -686,10 +817,10 @@ async.series({
       fn: function (deferred) {
         gm(fixtures.inputPngAlphaPremultiplicationLarge)
           .filter('Lanczos')
-          .resize(width, height)
+          .resize(width, heightPng)
           .define('PNG:compression-level=6')
           .define('PNG:compression-filter=0')
-          .write(fixtures.outputPng, function (err) {
+          .write(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -702,14 +833,13 @@ async.series({
       fn: function (deferred) {
         gm(fixtures.inputPngAlphaPremultiplicationLarge)
           .filter('Lanczos')
-          .resize(width, height)
+          .resize(width, heightPng)
           .define('PNG:compression-level=6')
           .define('PNG:compression-filter=0')
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -721,9 +851,9 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 6 })
-          .toFile(fixtures.outputPng, function (err) {
+          .toFile(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -736,13 +866,12 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 6 })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err, data) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -752,9 +881,9 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(fixtures.inputPngAlphaPremultiplicationLarge)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 6 })
-          .toFile(fixtures.outputPng, function (err) {
+          .toFile(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -767,13 +896,12 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(fixtures.inputPngAlphaPremultiplicationLarge)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 6 })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -783,13 +911,12 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 6, progressive: true })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -799,13 +926,12 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ adaptiveFiltering: true, compressionLevel: 6 })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -815,13 +941,12 @@ async.series({
       minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
-          .resize(width, height)
+          .resize(width, heightPng)
           .png({ compressionLevel: 9 })
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -841,7 +966,7 @@ async.series({
       fn: function (deferred) {
         sharp(inputWebPBuffer)
           .resize(width, height)
-          .toFile(fixtures.outputWebP, function (err) {
+          .toFile(outputWebP, function (err) {
             if (err) {
               throw err;
             } else {
@@ -854,11 +979,10 @@ async.series({
       fn: function (deferred) {
         sharp(inputWebPBuffer)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -868,7 +992,7 @@ async.series({
       fn: function (deferred) {
         sharp(fixtures.inputWebP)
           .resize(width, height)
-          .toFile(fixtures.outputWebP, function (err) {
+          .toFile(outputWebP, function (err) {
             if (err) {
               throw err;
             } else {
@@ -881,11 +1005,10 @@ async.series({
       fn: function (deferred) {
         sharp(fixtures.inputWebP)
           .resize(width, height)
-          .toBuffer(function (err, buffer) {
+          .toBuffer(function (err) {
             if (err) {
               throw err;
             } else {
-              assert.notStrictEqual(null, buffer);
               deferred.resolve();
             }
           });
@@ -897,7 +1020,9 @@ async.series({
     }).run();
   }
 }, function (err, results) {
-  assert(!err, err);
+  if (err) {
+    throw err;
+  }
   Object.keys(results).forEach(function (format) {
     if (results[format].toString().substr(0, 5) !== 'sharp') {
       console.log('sharp was slower than ' + results[format] + ' for ' + format);