Pre-release v0.28.0-alpha1

to help prevent memory fragmentation

.cirrus.yml

@@ -1,13 +1,15 @@
 freebsd_instance:
-  image_family: freebsd-12-0
+  image_family: freebsd-13-0-snap
 
 task:
+  name: FreeBSD 13.0
+  env:
+    IGNORE_OSVERSION: yes
   prerequisites_script:
-    - sed -i '' 's/quarterly/latest/g' /etc/pkg/FreeBSD.conf
     - pkg update -f
     - pkg upgrade -y
-    - pkg install -y pkgconf vips libnghttp2 node npm
+    - pkg install -y pkgconf vips node npm
   install_script:
-    - npm install --unsafe-perm
+    - npm install --build-from-source --unsafe-perm
   test_script:
     - npm test

.github/CONTRIBUTING.md

@@ -27,7 +27,7 @@ Please select the `master` branch as the destination for your Pull Request so yo
 
 Please squash your changes into a single commit using a command like `git rebase -i upstream/master`.
 
-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
 
@@ -42,10 +42,6 @@ You deserve to add your details to the [list of contributors](https://github.com
 
 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.
 
-| Release | WIP branch |
-| ------: | :--------- |
-| v0.26.0 | zoom       |
-
 Please squash your changes into a single commit using a command like `git rebase -i upstream/<wip-branch>`.
 
 ### Add a new public method

.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/installation.md

@@ -1,17 +1,19 @@
 ---
 name: Installation
-about: Something went wrong **installing** sharp
+about: Something went wrong during either 'npm install sharp' or 'require("sharp")'
 labels: installation
 
 ---
 
 Did you see the [documentation relating to installation](https://sharp.pixelplumbing.com/install)?
 
-Have you ensured the platform and version of Node.js used for `npm install` is the same as the platform and version of Node.js used at runtime?
+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?
 
 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`?
 
-If you are installing as a `root` or `sudo` user, have you tried with the `npm install --unsafe-perm` flag?
+If you are using npm v6 or earlier and installing as a `root` or `sudo` user, have you tried with the `npm install --unsafe-perm` flag?
+
+If you are using npm v7, does the user running `npm install` own the directory it is run in?
 
 If you are using the `ignore-scripts` feature of `npm`, have you tried with the `npm install --ignore-scripts=false` flag?
 

.github/ISSUE_TEMPLATE/possible-bug.md

@@ -1,6 +1,6 @@
 ---
 name: Possible bug
-about: Something unexpected occurred **using** sharp
+about: Installation of sharp was successful but then something unexpected occurred using one of its features
 labels: triage
 
 ---

.github/workflows/ci.yml

@@ -0,0 +1,87 @@
+on:
+  - push
+  - pull_request
+jobs:
+  CI:
+    runs-on: ${{ matrix.os }}
+    container: ${{ matrix.container }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            container: centos:7
+            nodejs_version: 10
+            coverage: true
+            prebuild: true
+          - os: ubuntu-20.04
+            container: centos:7
+            nodejs_version: 12
+          - os: ubuntu-20.04
+            container: centos:7
+            nodejs_version: 14
+          - os: ubuntu-20.04
+            container: centos:7
+            nodejs_version: 15
+          - os: ubuntu-20.04
+            container: node:10-alpine3.11
+            prebuild: true
+          - os: ubuntu-20.04
+            container: node:12-alpine3.11
+          - os: ubuntu-20.04
+            container: node:14-alpine3.11
+          - os: ubuntu-20.04
+            container: node:14-alpine3.13
+          - os: ubuntu-20.04
+            container: node:15-alpine3.11
+          - os: macos-10.15
+            nodejs_version: 10
+            prebuild: true
+          - os: macos-10.15
+            nodejs_version: 12
+          - os: macos-10.15
+            nodejs_version: 14
+          - os: macos-10.15
+            nodejs_version: 15
+          - os: windows-2019
+            nodejs_version: 10
+            prebuild: true
+          - os: windows-2019
+            nodejs_version: 12
+          - os: windows-2019
+            nodejs_version: 14
+          - os: windows-2019
+            nodejs_version: 15
+    steps:
+      - name: Dependencies (Linux glibc)
+        if: contains(matrix.container, 'centos')
+        run: |
+          curl -sL https://rpm.nodesource.com/setup_${{ matrix.nodejs_version }}.x | bash -
+          yum install -y gcc-c++ make git python3 nodejs
+      - name: Dependencies (Linux musl)
+        if: contains(matrix.container, 'alpine')
+        run: apk add build-base git python3 --update-cache
+      - name: Dependencies (macOS, Windows)
+        if: contains(matrix.os, 'macos') || contains(matrix.os, 'windows')
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.nodejs_version }}
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Fix working directory ownership
+        if: matrix.container
+        run: chown root.root .
+      - name: Install
+        run: npm install --build-from-source --unsafe-perm
+      - name: Test
+        run: npm test
+      - name: Coverage
+        if: matrix.coverage
+        uses: coverallsapp/github-action@v1.1.2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Prebuild
+        if: matrix.prebuild && startsWith(github.ref, 'refs/tags/')
+        env:
+          prebuild_upload: ${{ secrets.GITHUB_TOKEN }}
+        run: npx prebuild --runtime napi --target 3

.travis.yml

@@ -1,75 +1,108 @@
-matrix:
+jobs:
   include:
-    - name: "Linux (glibc 2.17+) - Node.js 10"
-      os: linux
-      dist: xenial
-      language: node_js
-      node_js: "10"
-    - name: "Linux (glibc 2.17+) - Node.js 12"
-      os: linux
-      dist: xenial
-      language: node_js
-      node_js: "12"
-    - name: "Linux (glibc 2.17+) - Node.js 13"
-      os: linux
-      dist: xenial
-      language: node_js
-      node_js: "13"
-      after_success:
-        - npm install coveralls
-        - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
-    - name: "Linux (musl 1.1.20+) - Node.js 10"
-      os: linux
-      dist: bionic
-      language: minimal
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:10.17.0-alpine3.9 # https://github.com/nodejs/docker-node/issues/1158
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-    - name: "Linux (musl 1.1.20+) - Node.js 12"
-      os: linux
-      dist: bionic
-      language: minimal
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${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 --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-    - name: "Linux (musl 1.1.20+) - Node.js 13"
-      os: linux
-      dist: bionic
-      language: minimal
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:13.0-alpine
-        - sudo docker exec sharp apk add build-base git python2 --update-cache
-      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-    - name: "Linux ARM64v8 (glibc 2.29+) - Node.js 10"
+    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 10"
       arch: arm64
       os: linux
       dist: bionic
-      language: minimal
+      language: shell
       before_install:
-        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp apt-get update
-        - sudo docker exec sharp apt-get install -y build-essential git python2 nodejs npm
-      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
+        - 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"
+        - 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: "macOS (10.13+) - Node.js 10"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "10"
-    - name: "macOS (10.13+) - Node.js 12"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "12"
-    - name: "macOS (10.13+) - Node.js 13"
-      os: osx
-      osx_image: xcode10.1
-      language: node_js
-      node_js: "13"
+      after_success: "[[ -n $TRAVIS_TAG ]] && sudo docker exec --env prebuild_upload sharp sh -c \"npx prebuild --runtime napi --target 3\""
+
+    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 12"
+      arch: arm64
+      os: linux
+      dist: bionic
+      language: shell
+      before_install:
+        - sudo docker run -dit --name sharp --volume "${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"
+        - 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 --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"
+        - 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 ${PWD}
+        - sudo docker run -dit --name sharp --volume "${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"
+        - 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: "Linux ARM64v8 (Alpine 3.11, musl 1.1.24) - Node.js 10"
+      arch: arm64
+      os: linux
+      dist: focal
+      language: shell
+      before_install:
+        - sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:10-alpine3.11
+        - sudo docker exec sharp sh -c "apk add build-base git python3 --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"
+      after_success: "[[ -n $TRAVIS_TAG ]] && sudo docker exec --env prebuild_upload sharp sh -c \"npx prebuild --runtime napi --target 3\""
+
+    - name: "Linux ARM64v8 (Alpine 3.11, musl 1.1.24) - Node.js 12"
+      arch: arm64
+      os: linux
+      dist: focal
+      language: shell
+      before_install:
+        - sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:12-alpine3.11
+        - sudo docker exec sharp sh -c "apk add build-base git python3 --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 (Alpine 3.11, musl 1.1.24) - Node.js 14"
+      arch: arm64
+      os: linux
+      dist: focal
+      language: shell
+      before_install:
+        - sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:14-alpine3.11
+        - sudo docker exec sharp sh -c "apk add build-base git python3 --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 (Alpine 3.11, musl 1.1.24) - Node.js 15"
+      arch: arm64
+      os: linux
+      dist: focal
+      language: shell
+      before_install:
+        - sudo chown 0.0 ${PWD}
+        - sudo docker run -dit --name sharp --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:15-alpine3.11
+        - sudo docker exec sharp sh -c "apk add build-base git python3 --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"
+
 cache:
   npm: false

README.md

@@ -1,14 +1,10 @@
 # sharp
 
-<img src="https://raw.githubusercontent.com/lovell/sharp/master/docs/image/sharp-logo.svg?sanitize=true" width="160" height="160" alt="sharp logo" align="right">
-
-```sh
-npm install 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">
 
 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 and AVIF images of varying dimensions.
 
 Resizing an image is typically 4x-5x faster than using the
 quickest ImageMagick and GraphicsMagick settings
@@ -25,6 +21,10 @@ do not require any additional install or runtime dependencies.
 
 ## Examples
 
+```sh
+npm install sharp
+```
+
 ```javascript
 const sharp = require('sharp');
 ```
@@ -85,6 +85,7 @@ readableStream
 ```
 
 [![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)
 
 ### Documentation
 
@@ -101,7 +102,7 @@ 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, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 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.

appveyor.yml

@@ -1,22 +1,18 @@
-os: Visual Studio 2017
+os: Visual Studio 2019
 version: "{build}"
 build: off
+platform: x86
 environment:
   matrix:
   - nodejs_version: "10"
-    platform: x86
-  - nodejs_version: "10"
-    platform: x64
+    prebuild: true
   - nodejs_version: "12"
-    platform: x86
-  - nodejs_version: "12"
-    platform: x64
-  - nodejs_version: "13"
-    platform: x86
-  - nodejs_version: "13"
-    platform: x64
+  - nodejs_version: "14"
+  - nodejs_version: "15"
 install:
-  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:platform
-  - npm install
+  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version)
+  - npm install --build-from-source
 test_script:
   - npm test
+on_success:
+  - if [%prebuild%] == [true] if [%APPVEYOR_REPO_TAG%] == [true] npx prebuild --runtime napi --target 3

binding.gyp

@@ -1,4 +1,8 @@
 {
+  'variables': {
+    'vips_version': '<!(node -p "require(\'./lib/libvips\').minimumLibvipsVersion")',
+    'sharp_vendor_dir': '<(module_root_dir)/vendor/<(vips_version)'
+  },
   'targets': [{
     'target_name': 'libvips-cpp',
     'conditions': [
@@ -16,23 +20,38 @@
           'src/libvips/cplusplus/VImage.cpp'
         ],
         'include_dirs': [
-          'vendor/include',
-          'vendor/include/glib-2.0',
-          'vendor/lib/glib-2.0/include'
-        ],
-        'libraries': [
-          '../vendor/lib/libvips.lib',
-          '../vendor/lib/libglib-2.0.lib',
-          '../vendor/lib/libgobject-2.0.lib'
+          '<(sharp_vendor_dir)/include',
+          '<(sharp_vendor_dir)/include/glib-2.0',
+          '<(sharp_vendor_dir)/lib/glib-2.0/include'
         ],
+        'link_settings': {
+          'library_dirs': ['<(sharp_vendor_dir)/lib'],
+          'libraries': [
+            'libvips.lib',
+            'libglib-2.0.lib',
+            'libgobject-2.0.lib'
+          ],
+        },
         'configurations': {
           'Release': {
             'msvs_settings': {
               'VCCLCompilerTool': {
-                'ExceptionHandling': 1
+                'ExceptionHandling': 1,
+                'WholeProgramOptimization': 'true'
+              },
+              'VCLibrarianTool': {
+                'AdditionalOptions': [
+                  '/LTCG:INCREMENTAL'
+                ]
               },
               'VCLinkerTool': {
-                'ImageHasSafeExceptionHandlers': 'false'
+                'ImageHasSafeExceptionHandlers': 'false',
+                'OptimizeReferences': 2,
+                'EnableCOMDATFolding': 2,
+                'LinkIncremental': 1,
+                'AdditionalOptions': [
+                  '/LTCG:INCREMENTAL'
+                ]
               }
             },
             'msvs_disabled_warnings': [
@@ -58,8 +77,8 @@
       'runtime_link%': 'shared',
       'conditions': [
         ['OS != "win"', {
-          'pkg_config_path': '<!(node -e "console.log(require(\'./lib/libvips\').pkgConfigPath())")',
-          'use_global_libvips': '<!(node -e "console.log(Boolean(require(\'./lib/libvips\').useGlobalLibvips()).toString())")'
+          'pkg_config_path': '<!(node -p "require(\'./lib/libvips\').pkgConfigPath()")',
+          'use_global_libvips': '<!(node -p "Boolean(require(\'./lib/libvips\').useGlobalLibvips()).toString()")'
         }, {
           'pkg_config_path': '',
           'use_global_libvips': ''
@@ -76,7 +95,7 @@
       'src/sharp.cc'
     ],
     'include_dirs': [
-      '<!@(node -p "require(\'node-addon-api\').include")',
+      '<!(node -p "require(\'node-addon-api\').include_dir")',
     ],
     'conditions': [
       ['use_global_libvips == "true"', {
@@ -98,9 +117,9 @@
       }, {
         # Use pre-built libvips stored locally within node_modules
         'include_dirs': [
-          'vendor/include',
-          'vendor/include/glib-2.0',
-          'vendor/lib/glib-2.0/include'
+          '<(sharp_vendor_dir)/include',
+          '<(sharp_vendor_dir)/include/glib-2.0',
+          '<(sharp_vendor_dir)/lib/glib-2.0/include'
         ],
         'conditions': [
           ['OS == "win"', {
@@ -108,64 +127,43 @@
               '_ALLOW_KEYWORD_MACROS',
               '_FILE_OFFSET_BITS=64'
             ],
-            'libraries': [
-              '../vendor/lib/libvips.lib',
-              '../vendor/lib/libglib-2.0.lib',
-              '../vendor/lib/libgobject-2.0.lib'
-            ]
+            'link_settings': {
+              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'libraries': [
+                'libvips.lib',
+                'libglib-2.0.lib',
+                'libgobject-2.0.lib'
+              ]
+            }
           }],
           ['OS == "mac"', {
-            'libraries': [
-              '../vendor/lib/libvips-cpp.42.dylib',
-              '../vendor/lib/libvips.42.dylib',
-              '../vendor/lib/libglib-2.0.0.dylib',
-              '../vendor/lib/libgobject-2.0.0.dylib',
-              # Ensure runtime linking is relative to sharp.node
-              '-rpath \'@loader_path/../../vendor/lib\''
-            ]
+            'link_settings': {
+              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'libraries': [
+                'libvips-cpp.42.dylib'
+              ]
+            },
+            'xcode_settings': {
+              'OTHER_LDFLAGS': [
+                # Ensure runtime linking is relative to sharp.node
+                '-Wl,-rpath,\'@loader_path/../../vendor/<(vips_version)/lib\''
+              ]
+            }
           }],
           ['OS == "linux"', {
             'defines': [
-              '_GLIBCXX_USE_CXX11_ABI=0'
+              '_GLIBCXX_USE_CXX11_ABI=1'
             ],
-            'libraries': [
-              '../vendor/lib/libvips-cpp.so',
-              '../vendor/lib/libvips.so',
-              '../vendor/lib/libglib-2.0.so',
-              '../vendor/lib/libgobject-2.0.so',
-              # Dependencies of dependencies, included for openSUSE support
-              '../vendor/lib/libcairo.so',
-              '../vendor/lib/libexif.so',
-              '../vendor/lib/libexpat.so',
-              '../vendor/lib/libffi.so',
-              '../vendor/lib/libfontconfig.so',
-              '../vendor/lib/libfreetype.so',
-              '../vendor/lib/libfribidi.so',
-              '../vendor/lib/libgdk_pixbuf-2.0.so',
-              '../vendor/lib/libgif.so',
-              '../vendor/lib/libgio-2.0.so',
-              '../vendor/lib/libgmodule-2.0.so',
-              '../vendor/lib/libgsf-1.so',
-              '../vendor/lib/libgthread-2.0.so',
-              '../vendor/lib/libharfbuzz.so',
-              '../vendor/lib/libjpeg.so',
-              '../vendor/lib/liblcms2.so',
-              '../vendor/lib/liborc-0.4.so',
-              '../vendor/lib/libpango-1.0.so',
-              '../vendor/lib/libpangocairo-1.0.so',
-              '../vendor/lib/libpangoft2-1.0.so',
-              '../vendor/lib/libpixman-1.so',
-              '../vendor/lib/libpng.so',
-              '../vendor/lib/librsvg-2.so',
-              '../vendor/lib/libtiff.so',
-              '../vendor/lib/libwebp.so',
-              '../vendor/lib/libwebpdemux.so',
-              '../vendor/lib/libwebpmux.so',
-              '../vendor/lib/libxml2.so',
-              '../vendor/lib/libz.so',
-              # Ensure runtime linking is relative to sharp.node
-              '-Wl,--disable-new-dtags -Wl,-rpath=\'$${ORIGIN}/../../vendor/lib\''
-            ]
+            'link_settings': {
+              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'libraries': [
+                '-l:libvips-cpp.so.42'
+              ],
+              'ldflags': [
+                # Ensure runtime linking is relative to sharp.node
+                '-Wl,-s -Wl,--disable-new-dtags -Wl,-rpath=\'$$ORIGIN/../../vendor/<(vips_version)/lib\''
+              ]
+            }
           }]
         ]
       }]
@@ -178,8 +176,7 @@
     ],
     'xcode_settings': {
       'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',
-      'CLANG_CXX_LIBRARY': 'libc++',
-      'MACOSX_DEPLOYMENT_TARGET': '10.7',
+      'MACOSX_DEPLOYMENT_TARGET': '10.9',
       'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
       'GCC_ENABLE_CPP_RTTI': 'YES',
       'OTHER_CPLUSPLUSFLAGS': [
@@ -204,10 +201,22 @@
           ['OS == "win"', {
             'msvs_settings': {
               'VCCLCompilerTool': {
-                'ExceptionHandling': 1
+                'ExceptionHandling': 1,
+                'WholeProgramOptimization': 'true'
+              },
+              'VCLibrarianTool': {
+                'AdditionalOptions': [
+                  '/LTCG:INCREMENTAL'
+                ]
               },
               'VCLinkerTool': {
-                'ImageHasSafeExceptionHandlers': 'false'
+                'ImageHasSafeExceptionHandlers': 'false',
+                'OptimizeReferences': 2,
+                'EnableCOMDATFolding': 2,
+                'LinkIncremental': 1,
+                'AdditionalOptions': [
+                  '/LTCG:INCREMENTAL'
+                ]
               }
             },
             'msvs_disabled_warnings': [

docs/README.md

@@ -1,10 +1,10 @@
 # sharp
 
-<img src="https://raw.githubusercontent.com/lovell/sharp/master/docs/image/sharp-logo.svg?sanitize=true" width="160" height="160" alt="sharp logo" align="right">
+<img src="https://cdn.jsdelivr.net/gh/lovell/sharp@master/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, AVIF and WebP images of varying dimensions.
 
 Resizing an image is typically 4x-5x faster than using the
 quickest ImageMagick and GraphicsMagick settings
@@ -21,9 +21,9 @@ 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, AVIF, TIFF, GIF 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, AVIF and TIFF formats as well as uncompressed raw pixel data.
 
 Streams, Buffer objects and the filesystem can be used for input and output.
 
@@ -66,7 +66,7 @@ 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, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 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.

docs/api-channel.md

@@ -42,7 +42,7 @@ Extract a single channel from a multi-channel image.
 
 ### Parameters
 
--   `channel` **([Number][1] \| [String][2])** zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
+-   `channel` **([number][1] \| [string][2])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
 
 ### Examples
 
@@ -70,12 +70,12 @@ 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.
 
-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]<([String][2] \| [Buffer][5])> | [String][2] \| [Buffer][5])** one or more images (file paths, Buffers).
+-   `images` **([Array][4]<([string][2] \| [Buffer][5])> | [string][2] \| [Buffer][5])** one or more images (file paths, Buffers).
 -   `options` **[Object][6]** image options, see `sharp()` constructor.
 
 
@@ -89,7 +89,7 @@ Perform a bitwise boolean operation on all input image channels (bands) to produ
 
 ### Parameters
 
--   `boolOp` **[String][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+-   `boolOp` **[string][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
 
 ### Examples
 

docs/api-colour.md

@@ -7,7 +7,7 @@ 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.
+-   `rgb` **([string][1] \| [Object][2])** parsed by the [color][3] module to extract chroma values.
 
 
 -   Throws **[Error][4]** Invalid parameter
@@ -46,8 +46,16 @@ By default output image will be web-friendly sRGB, with additional channels inte
 
 ### Parameters
 
--   `colourspace` **[String][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
+-   `colourspace` **[string][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
 
+### Examples
+
+```javascript
+// Output 16 bits per pixel RGB
+await sharp(input)
+ .toColourspace('rgb16')
+ .toFile('16-bpp.png')
+```
 
 -   Throws **[Error][4]** Invalid parameters
 
@@ -59,7 +67,7 @@ Alternative spelling of `toColourspace`.
 
 ### Parameters
 
--   `colorspace` **[String][1]?** output colorspace.
+-   `colorspace` **[string][1]?** output colorspace.
 
 
 -   Throws **[Error][4]** Invalid parameters

docs/api-composite.md

@@ -20,7 +20,7 @@ and [https://www.cairographics.org/operators/][2]
 ### Parameters
 
 -   `images` **[Array][3]<[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 bellow)
+    -   `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]?** 

docs/api-constructor.md

@@ -2,32 +2,47 @@
 
 ## Sharp
 
+Constructor factory to create an instance of `sharp`, to which further methods are chained.
+
+JPEG, PNG, WebP, 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.
+
 ### Parameters
 
--   `input` **([Buffer][1] \| [String][2])?** 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][3]?** if present, is an Object with optional attributes.
-    -   `options.failOnError` **[Boolean][4]** by default halt processing and raise an error when loading invalid images.
+-   `input` **([Buffer][2] \| [Uint8Array][3] \| [Uint8ClampedArray][4] \| [string][5])?** if present, can be
+     a Buffer / Uint8Array / Uint8ClampedArray containing JPEG, PNG, WebP, AVIF, GIF, SVG, TIFF or 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` **[Object][6]?** if present, is an Object with optional attributes.
+    -   `options.failOnError` **[boolean][7]** 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][5] \| [Boolean][4])** Do not process input images where the number of pixels
+    -   `options.limitInputPixels` **([number][8] \| [boolean][7])** 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][4]** Set this to `true` to use sequential rather than random access where possible.
+    -   `options.sequentialRead` **[boolean][7]** 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][5]** number representing the DPI for vector images. (optional, default `72`)
-    -   `options.pages` **[Number][5]** number of pages to extract for multi-page input (GIF, TIFF, PDF), use -1 for all pages. (optional, default `1`)
-    -   `options.page` **[Number][5]** page number to start extracting from for multi-page input (GIF, TIFF, PDF), zero based. (optional, default `0`)
-    -   `options.raw` **[Object][3]?** describes raw pixel input image data. See `raw()` for pixel ordering.
-        -   `options.raw.width` **[Number][5]?** 
-        -   `options.raw.height` **[Number][5]?** 
-        -   `options.raw.channels` **[Number][5]?** 1-4
-    -   `options.create` **[Object][3]?** describes a new image to be created.
-        -   `options.create.width` **[Number][5]?** 
-        -   `options.create.height` **[Number][5]?** 
-        -   `options.create.channels` **[Number][5]?** 3-4
-        -   `options.create.background` **([String][2] \| [Object][3])?** parsed by the [color][6] module to extract values for red, green, blue and alpha.
+    -   `options.density` **[number][8]** number representing the DPI for vector images in the range 1 to 100000. (optional, default `72`)
+    -   `options.pages` **[number][8]** number of pages to extract for multi-page input (GIF, WebP, AVIF, TIFF, PDF), use -1 for all pages. (optional, default `1`)
+    -   `options.page` **[number][8]** page number to start extracting from for multi-page input (GIF, WebP, AVIF, TIFF, PDF), zero based. (optional, default `0`)
+    -   `options.level` **[number][8]** level to extract from a multi-level input (OpenSlide), zero based. (optional, default `0`)
+    -   `options.animated` **[boolean][7]** Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`). (optional, default `false`)
+    -   `options.raw` **[Object][6]?** describes raw pixel input image data. See `raw()` for pixel ordering.
+        -   `options.raw.width` **[number][8]?** integral number of pixels wide.
+        -   `options.raw.height` **[number][8]?** integral number of pixels high.
+        -   `options.raw.channels` **[number][8]?** integral number of channels, between 1 and 4.
+    -   `options.create` **[Object][6]?** describes a new image to be created.
+        -   `options.create.width` **[number][8]?** integral number of pixels wide.
+        -   `options.create.height` **[number][8]?** integral number of pixels high.
+        -   `options.create.channels` **[number][8]?** integral number of channels, either 3 (RGB) or 4 (RGBA).
+        -   `options.create.background` **([string][5] \| [Object][6])?** parsed by the [color][9] module to extract values for red, green, blue and alpha.
+        -   `options.create.noise` **[Object][6]?** describes a noise to be created.
+            -   `options.create.noise.type` **[string][5]?** type of generated noise, currently only `gaussian` is supported.
+            -   `options.create.noise.mean` **[number][8]?** mean of pixels in generated noise.
+            -   `options.create.noise.sigma` **[number][8]?** standard deviation of pixels in generated noise.
 
 ### Examples
 
@@ -68,9 +83,45 @@ sharp({
 .then( ... );
 ```
 
--   Throws **[Error][7]** Invalid parameters
+```javascript
+// Convert an animated GIF to an animated WebP
+await sharp('in.gif', { animated: true }).toFile('out.webp');
+```
 
-Returns **[Sharp][8]** 
+```javascript
+// 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');
+```
+
+```javascript
+// Generate RGB Gaussian noise
+await sharp({
+  create: {
+    width: 300,
+    height: 200,
+    channels: 3,
+    noise: {
+      type: 'gaussian',
+      mean: 128,
+      sigma: 30
+    }
+ }
+}).toFile('noise.png');
+```
+
+-   Throws **[Error][10]** Invalid parameters
+
+Returns **[Sharp][11]** 
 
 ## clone
 
@@ -89,20 +140,75 @@ readableStream.pipe(pipeline);
 // secondWritableStream receives auto-rotated, extracted region of readableStream
 ```
 
-Returns **[Sharp][8]** 
+```javascript
+// 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
+});
 
-[1]: https://nodejs.org/api/buffer.html
+const promises = [];
 
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+promises.push(
+  sharpStream
+    .clone()
+    .jpeg({ quality: 100 })
+    .toFile("originalFile.jpg")
+);
 
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
+promises.push(
+  sharpStream
+    .clone()
+    .resize({ width: 500 })
+    .jpeg({ quality: 80 })
+    .toFile("optimized-500.jpg")
+);
 
-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
+promises.push(
+  sharpStream
+    .clone()
+    .resize({ width: 500 })
+    .webp({ quality: 80 })
+    .toFile("optimized-500.webp")
+);
 
-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
+// https://github.com/sindresorhus/got#gotstreamurl-options
+got.stream("https://www.example.com/some-file.jpg").pipe(sharpStream);
 
-[6]: https://www.npmjs.org/package/color
+Promise.all(promises)
+  .then(res => { console.log("Done!", res); })
+  .catch(err => {
+    console.error("Error processing files, let's clean it up", err);
+    try {
+      fs.unlinkSync("originalFile.jpg");
+      fs.unlinkSync("optimized-500.jpg");
+      fs.unlinkSync("optimized-500.webp");
+    } catch (e) {}
+  });
+```
 
-[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+Returns **[Sharp][11]** 
 
-[8]: #sharp
+[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/Uint8Array
+
+[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray
+
+[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+
+[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://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
+
+[9]: https://www.npmjs.org/package/color
+
+[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+
+[11]: #sharp

docs/api-input.md

@@ -20,6 +20,7 @@ A `Promise` is returned when `callback` is not provided.
 -   `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
@@ -70,6 +71,8 @@ A `Promise` is returned when `callback` is not provided.
     -   `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)
 
 ### Parameters
 
@@ -86,6 +89,11 @@ image
   });
 ```
 
+```javascript
+const { entropy, sharpness, dominant } = await sharp(input).stats();
+const { r, g, b } = dominant;
+```
+
 Returns **[Promise][5]<[Object][6]>** 
 
 [1]: https://libvips.github.io/libvips/API/current/VipsImage.html#VipsInterpretation

docs/api-operation.md

@@ -21,9 +21,9 @@ for example `rotate(x).extract(y)` will produce a different result to `extract(y
 
 ### Parameters
 
--   `angle` **[Number][1]** angle of rotation. (optional, default `auto`)
+-   `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"`)
+    -   `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
 
@@ -65,6 +65,61 @@ The use of `flop` implies the removal of the EXIF `Orientation` tag, if any.
 
 Returns **Sharp** 
 
+## affine
+
+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`.
+
+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`
+
+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.
+
+### Parameters
+
+-   `matrix` **([Array][7]<[Array][7]<[number][1]>> | [Array][7]<[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`)
+
+### Examples
+
+```javascript
+const pipeline = sharp()
+  .affine([[1, 0.3], [0.1, 0.7]], {
+     background: 'white',
+     interpolate: sharp.interpolators.nohalo
+  })
+  .toBuffer((err, outputBuffer, info) => {
+     // outputBuffer contains the transformed image
+     // info.width and info.height contain the new dimensions
+  });
+
+inputStream
+  .pipe(pipeline);
+```
+
+-   Throws **[Error][5]** Invalid parameters
+
+Returns **Sharp** 
+
+**Meta**
+
+-   **since**: 0.27.0
+
 ## sharpen
 
 Sharpen the image.
@@ -74,9 +129,9 @@ Separate control over the level of sharpening in "flat" and "jagged" areas is av
 
 ### 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`)
+-   `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`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -90,7 +145,7 @@ When used without parameters the default window is 3x3.
 
 ### Parameters
 
--   `size` **[Number][1]** square mask size: size x size (optional, default `3`)
+-   `size` **[number][1]** square mask size: size x size (optional, default `3`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -105,7 +160,7 @@ 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`.
+-   `sigma` **[number][1]?** a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -119,7 +174,7 @@ Merge alpha transparency channel, if any, with a background.
 ### Parameters
 
 -   `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}`)
+    -   `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** 
 
@@ -135,8 +190,8 @@ Supply a second argument to use a different output gamma value, otherwise the fi
 
 ### 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`)
+-   `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 **[Error][5]** Invalid parameters
@@ -180,11 +235,11 @@ 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]<[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`)
+    -   `kernel.width` **[number][1]** width of the kernel in pixels.
+    -   `kernel.height` **[number][1]** width of the kernel in pixels.
+    -   `kernel.kernel` **[Array][7]<[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`)
 
 ### Examples
 
@@ -212,7 +267,7 @@ Any pixel value greather than or equal to the threshold value will be set to 255
 
 ### Parameters
 
--   `threshold` **[Number][1]** a value in the range 0-255 representing the level at which the threshold will be applied. (optional, default `128`)
+-   `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`)
@@ -231,13 +286,13 @@ the selected bitwise boolean `operation` between the corresponding pixels of the
 
 ### 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.
+-   `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]?** 
+        -   `options.raw.width` **[number][1]?** 
+        -   `options.raw.height` **[number][1]?** 
+        -   `options.raw.channels` **[number][1]?** 
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -250,8 +305,8 @@ Apply the linear formula a \* input + b to the image (levels adjustment)
 
 ### Parameters
 
--   `a` **[Number][1]** multiplier (optional, default `1.0`)
--   `b` **[Number][1]** offset (optional, default `0.0`)
+-   `a` **[number][1]** multiplier (optional, default `1.0`)
+-   `b` **[number][1]** offset (optional, default `0.0`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -264,8 +319,7 @@ Recomb the image with the specified matrix.
 
 ### Parameters
 
--   `inputMatrix`  
--   `3x3` **[Array][7]<[Array][7]<[Number][1]>>** Recombination matrix
+-   `inputMatrix` **[Array][7]<[Array][7]<[number][1]>>** 3x3 Recombination matrix
 
 ### Examples
 
@@ -298,9 +352,9 @@ Transforms the image using brightness, saturation and hue rotation.
 ### Parameters
 
 -   `options` **[Object][2]?** 
-    -   `options.brightness` **[Number][1]?** Brightness multiplier
-    -   `options.saturation` **[Number][1]?** Saturation multiplier
-    -   `options.hue` **[Number][1]?** Degrees for hue rotation
+    -   `options.brightness` **[number][1]?** Brightness multiplier
+    -   `options.saturation` **[number][1]?** Saturation multiplier
+    -   `options.hue` **[number][1]?** Degrees for hue rotation
 
 ### Examples
 

docs/api-output.md

@@ -5,7 +5,7 @@
 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, 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.
@@ -15,7 +15,7 @@ A `Promise` is returned when `callback` is not provided.
 
 ### Parameters
 
--   `fileOut` **[String][2]** the path to write the image data to.
+-   `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).
@@ -42,7 +42,7 @@ Returns **[Promise][5]<[Object][6]>** when no callback is provided
 ## toBuffer
 
 Write output to a Buffer.
-JPEG, PNG, WebP, TIFF and RAW output are supported.
+JPEG, PNG, WebP, AVIF, TIFF 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.
 
@@ -62,7 +62,7 @@ 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`.
+    -   `options.resolveWithObject` **[boolean][7]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
 -   `callback` **[Function][3]?** 
 
 ### Examples
@@ -86,18 +86,37 @@ sharp(input)
   .catch(err => { ... });
 ```
 
+```javascript
+const data = await sharp('my-image.jpg')
+  // output the raw pixels
+  .raw()
+  .toBuffer();
+
+// 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
+await sharp(pixelArray).toFile('my-changed-image.jpg');
+```
+
 Returns **[Promise][5]<[Buffer][8]>** when no callback is provided
 
 ## withMetadata
 
 Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
-The default behaviour, when `withMetadata` is not used, is to strip all metadata and convert to the device-independent sRGB colour space.
-This will also convert to and add a web-friendly sRGB ICC profile.
+This will also convert to and add a web-friendly sRGB ICC profile 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
 
 -   `options` **[Object][6]?** 
-    -   `options.orientation` **[Number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
+    -   `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
 
@@ -118,7 +137,7 @@ Force output to a given format.
 
 ### Parameters
 
--   `format` **([String][2] \| [Object][6])** as a String or an Object with an 'id' attribute
+-   `format` **([string][2] \| [Object][6])** as a string or an Object with an 'id' attribute
 -   `options` **[Object][6]** output options
 
 ### Examples
@@ -141,18 +160,19 @@ Use these JPEG options for output image.
 ### Parameters
 
 -   `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 when quality <= 90 (optional, default `'4:2:0'`)
-    -   `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 (optional, default `false`)
-    -   `options.optimiseCoding` **[Boolean][7]** optimise Huffman coding tables (optional, default `true`)
-    -   `options.optimizeCoding` **[Boolean][7]** alternative spelling of optimiseCoding (optional, default `true`)
-    -   `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 (optional, default `0`)
-    -   `options.force` **[Boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
+    -   `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.mozjpeg` **[boolean][7]** use mozjpeg defaults, equivalent to `{ trellisQuantisation: true, overshootDeringing: true, optimiseScans: true, quantisationTable: 3 }` (optional, default `false`)
+    -   `options.trellisQuantisation` **[boolean][7]** apply trellis quantisation (optional, default `false`)
+    -   `options.overshootDeringing` **[boolean][7]** apply overshoot deringing (optional, default `false`)
+    -   `options.optimiseScans` **[boolean][7]** optimise progressive scans, forces progressive (optional, default `false`)
+    -   `options.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans (optional, default `false`)
+    -   `options.quantisationTable` **[number][9]** quantization table to use, integer 0-8 (optional, default `0`)
+    -   `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable (optional, default `0`)
+    -   `options.force` **[boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
 
 ### Examples
 
@@ -166,6 +186,13 @@ const data = await sharp(input)
   .toBuffer();
 ```
 
+```javascript
+// 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** 
@@ -174,31 +201,39 @@ Returns **Sharp**
 
 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.
 
 ### Parameters
 
 -   `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, requires libvips compiled with support for libimagequant (optional, default `100`)
-    -   `options.colours` **[Number][9]** maximum number of palette entries, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.colors` **[Number][9]** alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.dither` **[Number][9]** level of Floyd-Steinberg error diffusion, 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`)
+    -   `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`)
+    -   `options.compressionLevel` **[number][9]** zlib compression level, 0 (fastest, largest) to 9 (slowest, smallest) (optional, default `6`)
+    -   `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 (optional, default `false`)
+    -   `options.quality` **[number][9]** use the lowest number of colours needed to achieve given quality, sets `palette` to `true` (optional, default `100`)
+    -   `options.colours` **[number][9]** maximum number of palette entries, sets `palette` to `true` (optional, default `256`)
+    -   `options.colors` **[number][9]** alternative spelling of `options.colours`, sets `palette` to `true` (optional, default `256`)
+    -   `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, sets `palette` to `true` (optional, default `1.0`)
+    -   `options.force` **[boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`)
 
 ### Examples
 
 ```javascript
-// Convert any input to PNG output
+// Convert any input to full colour PNG output
 const data = await sharp(input)
   .png()
   .toBuffer();
 ```
 
+```javascript
+// Convert any input to indexed PNG output (slower)
+const data = await sharp(input)
+  .png({ palette: true })
+  .toBuffer();
+```
+
 -   Throws **[Error][4]** Invalid options
 
 Returns **Sharp** 
@@ -210,13 +245,16 @@ 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.force` **[Boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`)
+    -   `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]<[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`)
 
 ### Examples
 
@@ -227,6 +265,27 @@ const data = await sharp(input)
   .toBuffer();
 ```
 
+-   Throws **[Error][4]** Invalid options
+
+Returns **Sharp** 
+
+## gif
+
+Use these GIF options for output image.
+
+Requires libvips compiled with support for ImageMagick or GraphicsMagick.
+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]<[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`)
+
+
 -   Throws **[Error][4]** Invalid options
 
 Returns **Sharp** 
@@ -238,17 +297,17 @@ Use these TIFF options for output image.
 ### Parameters
 
 -   `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.squash` **[Boolean][7]** squash 8-bit images down to 1 bit (optional, default `false`)
+    -   `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` **[string][2]** compression options: lzw, deflate, jpeg, ccittfax4 (optional, default `'jpeg'`)
+    -   `options.predictor` **[string][2]** 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` **[number][9]** horizontal tile size (optional, default `256`)
+    -   `options.tileHeight` **[number][9]** 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` **[number][9]** reduce bitdepth to 1, 2 or 4 bit (optional, default `8`)
 
 ### Examples
 
@@ -257,7 +316,7 @@ Use these TIFF options for output image.
 sharp('input.svg')
   .tiff({
     compression: 'lzw',
-    squash: true
+    bitdepth: 1
   })
   .toFile('1-bpp-output.tiff')
   .then(info => { ... });
@@ -267,23 +326,45 @@ sharp('input.svg')
 
 Returns **Sharp** 
 
-## heif
+## avif
 
-Use these HEIF options for output image.
+Use these AVIF 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.
+Whilst it is possible to create AVIF images smaller than 16x16 pixels,
+most web browsers do not display these properly.
 
 ### 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`)
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `50`)
+    -   `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`)
+    -   `options.speed` **[number][9]** CPU effort vs file size, 0 (slowest/smallest) to 8 (fastest/largest) (optional, default `5`)
+    -   `options.chromaSubsampling` **[string][2]** set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling, requires libvips v8.11.0 (optional, default `'4:2:0'`)
+
+
+-   Throws **[Error][4]** Invalid options
+
+Returns **Sharp** 
+
+**Meta**
+
+-   **since**: 0.27.0
+
+## heif
+
+Use these HEIF options for output image.
+
+Support for patent-encumbered HEIC images requires the use of a
+globally-installed libvips compiled with support for libheif, libde265 and x265.
+
+### Parameters
+
+-   `options` **[Object][6]?** output options
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `50`)
+    -   `options.compression` **[string][2]** compression format: av1, hevc (optional, default `'av1'`)
+    -   `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`)
+    -   `options.speed` **[number][9]** CPU effort vs file size, 0 (slowest/smallest) to 8 (fastest/largest) (optional, default `5`)
+    -   `options.chromaSubsampling` **[string][2]** set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling, requires libvips v8.11.0 (optional, default `'4:2:0'`)
 
 
 -   Throws **[Error][4]** Invalid options
@@ -314,7 +395,7 @@ const { data, info } = await sharp('input.jpg')
 const data = await sharp('input.png')
   .ensureAlpha()
   .extractChannel(3)
-  .colourspace('b-w')
+  .toColourspace('b-w')
   .raw()
   .toBuffer();
 ```
@@ -332,14 +413,16 @@ Warning: multiple sharp instances concurrently producing tile output can expose
 ### Parameters
 
 -   `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][10] 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`, `zoomify` or `google`. (optional, default `'dz'`)
+    -   `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
 
@@ -377,4 +460,8 @@ Returns **Sharp**
 
 [9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
 
-[10]: https://www.npmjs.org/package/color
+[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

docs/api-resize.md

@@ -6,8 +6,8 @@ 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`: Crop to cover both provided dimensions (the default).
--   `contain`: Embed within both provided dimensions.
+-   `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.
@@ -38,8 +38,8 @@ Possible interpolation kernels are:
 
 ### 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.
+-   `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.
@@ -136,11 +136,11 @@ 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` **([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}`)
 
 ### Examples
@@ -166,7 +166,7 @@ Returns **Sharp**
 
 ## extract
 
-Extract a region of the image.
+Extract/crop a region of the image.
 
 -   Use `extract` before `resize` for pre-resize extraction.
 -   Use `extract` after `resize` for post-resize extraction.
@@ -175,10 +175,10 @@ Extract a region of the image.
 ### 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
+    -   `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
 
 ### Examples
 
@@ -209,11 +209,12 @@ Returns **Sharp**
 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.
 
-The `info` response Object will contain `trimOffsetLeft` and `trimOffsetTop` properties.
+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`)
+-   `threshold` **[number][8]** the allowed difference from the top-left pixel, a number greater than zero. (optional, default `10`)
 
 
 -   Throws **[Error][13]** Invalid parameters

docs/api-utility.md

@@ -12,6 +12,36 @@ 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
 
 An Object containing the version numbers of libvips and its dependencies.
@@ -31,10 +61,10 @@ useful for determining how much working memory is required for a particular task
 
 ### Parameters
 
--   `options` **([Object][1] \| [Boolean][2])** Object with the following attributes, or Boolean where true uses default cache settings and false removes all caching (optional, default `true`)
-    -   `options.memory` **[Number][3]** is the maximum memory in MB to use for this cache (optional, default `50`)
-    -   `options.files` **[Number][3]** is the maximum number of files to hold open (optional, default `20`)
-    -   `options.items` **[Number][3]** is the maximum number of operations to cache (optional, default `100`)
+-   `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
 
@@ -64,7 +94,7 @@ This method always returns the current concurrency.
 
 ### Parameters
 
--   `concurrency` **[Number][3]?** 
+-   `concurrency` **[number][11]?** 
 
 ### Examples
 
@@ -74,7 +104,7 @@ sharp.concurrency(2); // 2
 sharp.concurrency(0); // 4
 ```
 
-Returns **[Number][3]** concurrency
+Returns **[number][11]** concurrency
 
 ## queue
 
@@ -116,7 +146,7 @@ by taking advantage of the SIMD vector unit of the CPU, e.g. Intel SSE and ARM N
 
 ### Parameters
 
--   `simd` **[Boolean][2]**  (optional, default `true`)
+-   `simd` **[boolean][10]**  (optional, default `true`)
 
 ### Examples
 
@@ -130,10 +160,26 @@ const simd = sharp.simd(false);
 // prevent libvips from using liborc at runtime
 ```
 
-Returns **[Boolean][2]** 
+Returns **[boolean][10]** 
 
 [1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
 
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
+[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
 
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
+[3]: http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation
+
+[4]: http://en.wikipedia.org/wiki/Bilinear_interpolation
+
+[5]: http://en.wikipedia.org/wiki/Bicubic_interpolation
+
+[6]: https://github.com/jcupitt/libvips/blob/master/libvips/resample/lbb.cpp#L100
+
+[7]: http://en.wikipedia.org/wiki/Acutance
+
+[8]: http://eprints.soton.ac.uk/268086/
+
+[9]: https://github.com/jcupitt/libvips/blob/master/libvips/resample/vsqbs.cpp#L48
+
+[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
+
+[11]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

docs/build.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const fs = require('fs').promises;
+const path = require('path');
+const documentation = require('documentation');
+
+[
+  '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 documentation.build(input, { shallow: true });
+  const markdown = await documentation.formats.md(ast, { markdownToc: false });
+
+  await fs.writeFile(output, markdown);
+});

docs/changelog.md

@@ -1,9 +1,211 @@
 # Changelog
 
+## v0.28 - *bijou*
+
+Requires libvips v8.10.6
+
+### v0.28.0 - TBD
+
+* 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.
+
+* Ensure `@id` attribute can be set for IIIF tile-based output.
+  [#2612](https://github.com/lovell/sharp/issues/2612)
+  [@edsilv](https://github.com/edsilv)
+
+## 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
+
+### v0.26.3 - 16th November 2020
+
+* Expose libvips' affine operation.
+  [#2336](https://github.com/lovell/sharp/pull/2336)
+  [@guillevc](https://github.com/guillevc)
+
+* Fallback to tar.gz for prebuilt libvips when Brotli not available.
+  [#2412](https://github.com/lovell/sharp/pull/2412)
+  [@ascorbic](https://github.com/ascorbic)
+
+### v0.26.2 - 14th October 2020
+
+* Add support for EXR input. Requires libvips compiled with OpenEXR.
+  [#698](https://github.com/lovell/sharp/issues/698)
+
+* Ensure support for yarn v2.
+  [#2379](https://github.com/lovell/sharp/pull/2379)
+  [@jalovatt](https://github.com/jalovatt)
+
+* Add centre/center option to tile-based output.
+  [#2397](https://github.com/lovell/sharp/pull/2397)
+  [@beig](https://github.com/beig)
+
+### v0.26.1 - 20th September 2020
+
+* Ensure correct pageHeight when verifying multi-page image dimensions.
+  [#2343](https://github.com/lovell/sharp/pull/2343)
+  [@derom](https://github.com/derom)
+
+* Allow input density range up to 100000 DPI.
+  [#2348](https://github.com/lovell/sharp/pull/2348)
+  [@stefanprobst](https://github.com/stefanprobst)
+
+* Ensure animation-related properties can be set for Stream-based input.
+  [#2369](https://github.com/lovell/sharp/pull/2369)
+  [@AcrylicShrimp](https://github.com/AcrylicShrimp)
+
+* Ensure `stats` can be calculated for 1x1 input.
+  [#2372](https://github.com/lovell/sharp/issues/2372)
+
+* Ensure animated GIF output is optimised.
+  [#2376](https://github.com/lovell/sharp/issues/2376)
+
+### v0.26.0 - 25th August 2020
+
+* Prebuilt libvips binaries are now statically-linked and Brotli-compressed, requiring Node.js 10.16.0+.
+
+* TIFF output `squash` is replaced by `bitdepth` to reduce to 1, 2 or 4 bit.
+
+* JPEG output `quality` >= 90 no longer automatically sets `chromaSubsampling` to `4:4:4`.
+
+* Add most `dominant` colour to image `stats`.
+  [#640](https://github.com/lovell/sharp/issues/640)
+
+* Add support for animated GIF (requires \*magick) and WebP output.
+  [#2012](https://github.com/lovell/sharp/pull/2012)
+  [@deftomat](https://github.com/deftomat)
+
+* Add support for libvips ImageMagick v7 loaders.
+  [#2258](https://github.com/lovell/sharp/pull/2258)
+  [@vouillon](https://github.com/vouillon)
+
+* Allow multi-page input via \*magick.
+  [#2259](https://github.com/lovell/sharp/pull/2259)
+  [@vouillon](https://github.com/vouillon)
+
+* Add support to `withMetadata` for custom ICC profile.
+  [#2271](https://github.com/lovell/sharp/pull/2271)
+  [@roborourke](https://github.com/roborourke)
+
+* Ensure prebuilt binaries for ARM default to v7 when using Electron.
+  [#2292](https://github.com/lovell/sharp/pull/2292)
+  [@diegodev3](https://github.com/diegodev3)
+
 ## v0.25 - *yield*
 
 Requires libvips v8.9.1
 
+### v0.25.4 - 12th June 2020
+
+* Allow libvips binary location override where version is appended.
+  [#2217](https://github.com/lovell/sharp/pull/2217)
+  [@malice00](https://github.com/malice00)
+
+* Enable PNG palette when setting quality, colours, colors or dither.
+  [#2226](https://github.com/lovell/sharp/pull/2226)
+  [@romaleev](https://github.com/romaleev)
+
+* Add `level` constructor option to use a specific level of a multi-level image.
+  Expose `levels` metadata for multi-level images.
+  [#2222](https://github.com/lovell/sharp/issues/2222)
+
+* Add support for named `alpha` channel to `extractChannel` operation.
+  [#2138](https://github.com/lovell/sharp/issues/2138)
+
+* Add experimental `sharpness` calculation to `stats()` response.
+  [#2251](https://github.com/lovell/sharp/issues/2251)
+
+* Emit `warning` event for non-critical processing problems.
+  [#2032](https://github.com/lovell/sharp/issues/2032)
+
+### v0.25.3 - 17th May 2020
+
+* Ensure libvips is initialised only once, improves worker thread safety.
+  [#2143](https://github.com/lovell/sharp/issues/2143)
+
+* Ensure npm platform flag is respected when copying DLLs.
+  [#2188](https://github.com/lovell/sharp/pull/2188)
+  [@dimadeveatii](https://github.com/dimadeveatii)
+
+* Allow SVG input with large inline images to be parsed.
+  [#2195](https://github.com/lovell/sharp/issues/2195)
+
+### v0.25.2 - 20th March 2020
+
+* Provide prebuilt binaries for Linux ARM64v8.
+
+* Add IIIF layout support to tile-based output.
+  [#2098](https://github.com/lovell/sharp/pull/2098)
+  [@edsilv](https://github.com/edsilv)
+
+* Ensure input options are consistently and correctly detected.
+  [#2118](https://github.com/lovell/sharp/issues/2118)
+
+* Ensure N-API prebuilt binaries work on RHEL7 and its derivatives.
+  [#2119](https://github.com/lovell/sharp/issues/2119)
+
+* Ensure AsyncWorker options are persisted.
+  [#2130](https://github.com/lovell/sharp/issues/2130)
+
 ### v0.25.1 - 7th March 2020
 
 * Ensure prebuilt binaries are fetched based on N-API version.

docs/firebase.json

@@ -4,9 +4,11 @@
     "public": ".",
     "ignore": [
       ".*",
-      "*.json",
+      "build.js",
+      "firebase.json",
       "*.md",
-      "image/**"
+      "image/**",
+      "search-index/**"
     ],
     "headers": [
       {

docs/humans.txt

@@ -176,3 +176,36 @@ GitHub: https://github.com/rustyguts
 
 Name: Brychan Bennett-Odlum
 GitHub: https://github.com/BrychanOdlum
+
+Name: Edward Silverton
+GitHub: https://github.com/edsilv
+
+Name: Dumitru Deveatii
+GitHub: https://github.com/dimadeveatii
+
+Name: Roland Asmann
+GitHub: https://github.com/malice00
+
+Name: Roman Malieiev
+GitHub: https://github.com/romaleev
+
+Name: Jerome Vouillon
+GitHub: https://github.com/vouillon
+
+Name: Tomáš Szabo
+GitHub: https://github.com/deftomat
+
+Name: Robert O'Rourke
+GitHub: https://github.com/roborourke
+
+Name: Denis Soldatov
+GitHub: https://github.com/derom
+
+Name: Stefan Probst
+GitHub: https://github.com/stefanprobst
+
+Name: Thomas Beiganz
+GitHub: https://github.com/beig
+
+Name: Florian Busch
+GitHub: https://github.com/florian-busch

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

@@ -19,25 +19,28 @@ Node.js v10+ on the most common platforms:
 
 * macOS x64 (>= 10.13)
 * Linux x64 (glibc >= 2.17, musl >= 1.1.24)
-* Windows
+* Linux ARM64 (glibc >= 2.29, musl >= 1.1.24)
+* Windows x64
+* Windows x86
 
-A ~10MB tarball containing libvips and its most commonly used dependencies
+An ~8MB tarball containing libvips and its most commonly used dependencies
 is downloaded via HTTPS and stored within `node_modules/sharp/vendor` during `npm install`.
 
 This provides support for the
-JPEG, PNG, WebP, TIFF, GIF (input) and SVG (input) image formats.
+JPEG, PNG, WebP, AVIF, TIFF, GIF (input) and SVG (input) image formats.
 
 The following platforms have prebuilt libvips but not sharp:
 
+* macOS ARM64
 * Linux ARMv6
 * Linux ARMv7 (glibc >= 2.28)
-* Linux ARM64 (glibc >= 2.29)
+* Windows ARM64
 
 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 ARM64 (glibc <= 2.28)
 * Linux PowerPC
 * FreeBSD
 * OpenBSD
@@ -47,12 +50,26 @@ The following platforms require compilation of both libvips and sharp from sourc
 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.
+When using npm v6 or earlier, the `npm install --unsafe-perm` flag must be used when installing as `root` or a `sudo` user.
+
+When using npm v7, the user running `npm install` must own the directory it is run in.
 
 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.
 
+## Apple M1
+
+Prebuilt libvips binaries are provided for macOS on ARM64 (since sharp v0.28.0).
+
+During `npm install` sharp will be built locally,
+which requires Xcode and Python - see
+[building from source](#building-from-source).
+
+When this new ARM64 CPU is made freely available
+to open source projects via a CI service
+then prebuilt sharp binaries can also be provided.
+
 ## Custom libvips
 
 To use a custom, globally-installed version of libvips instead of the provided binaries,
@@ -69,7 +86,7 @@ The use of a globally-installed libvips is unsupported on Windows.
 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
+* prebuilt sharp binaries do not exist for the current platform, or
 * when the `npm install --build-from-source` flag is used.
 
 Building from source requires:
@@ -81,24 +98,44 @@ Building from source requires:
 
 This is an advanced approach that most people will not require.
 
-To install the prebuilt libvips binaries from a custom URL,
-set the `sharp_dist_base_url` npm config option
-or the `SHARP_DIST_BASE_URL` environment variable.
+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.
 
-For example, both of the following will result in an attempt to download the file located at
-`https://hostname/path/libvips-x.y.z-platform.tar.gz`.
+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_dist_base_url "https://hostname/path/"
+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
 ```
 
-```sh
-SHARP_DIST_BASE_URL="https://hostname/path/" npm install sharp
-```
+or set the following environment variables:
 
-To install the prebuilt sharp binaries from a custom URL, please see
-[https://github.com/prebuild/prebuild-install#custom-binaries](https://github.com/prebuild/prebuild-install#custom-binaries)
+```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
+```
 
 ## FreeBSD
 
@@ -130,11 +167,19 @@ The binaries in 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.
 
-On machines other than Linux x64, such as macOS and Windows, run the following:
+When building your deployment package on machines other than Linux x64 (glibc),
+run the following commands:
 
+macOS:
 ```sh
 rm -rf node_modules/sharp
-npm install --arch=x64 --platform=linux --target=12.0.0 sharp
+SHARP_IGNORE_GLOBAL_LIBVIPS=1 npm install --arch=x64 --platform=linux sharp
+```
+
+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:
@@ -147,16 +192,34 @@ docker run -v "$PWD":/var/task lambci/lambda:build-nodejs12.x npm install sharp
 To get the best performance select the largest memory available.
 A 1536 MB function provides ~12x more CPU time than a 128 MB function.
 
-## Electron
+## Webpack
 
-Electron provides versions of the V8 JavaScript engine
-that are incompatible with Node.js.
-To ensure the correct binaries are used, run the following:
+Ensure sharp is added to the
+[externals](https://webpack.js.org/configuration/externals/)
+configuration.
 
-```sh
-npm install
-npx electron-rebuild
+```js
+externals: {
+  'sharp': 'commonjs sharp'
+}
 ```
 
-Further help can be found at
-[https://electronjs.org/docs/tutorial/using-native-node-modules](https://electronjs.org/docs/tutorial/using-native-node-modules)
+## Worker threads
+
+The main thread must call `require('sharp')`
+before worker threads are created
+to ensure shared libraries remain loaded in memory
+until after all threads are complete.
+
+## Known conflicts
+
+### Canvas and Windows
+
+The prebuilt binaries provided by `canvas` for Windows depend on the unmaintained GTK 2, last updated in 2011.
+
+These conflict with the modern, up-to-date binaries provided by sharp.
+
+If both modules are used in the same Windows process, the following error will occur:
+```
+The specified procedure could not be found.
+```

docs/performance.md

@@ -4,11 +4,11 @@ A test to benchmark the performance of this module relative to alternatives.
 
 ## The contenders
 
-* [jimp](https://www.npmjs.com/package/jimp) v0.9.3 - Image processing in pure JavaScript. Provides bicubic interpolation.
-* [mapnik](https://www.npmjs.org/package/mapnik) v4.3.1 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
+* [jimp](https://www.npmjs.com/package/jimp) v0.16.1 - Image processing in pure JavaScript. Provides bicubic interpolation.
+* [mapnik](https://www.npmjs.org/package/mapnik) v4.5.5 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
 * [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 v0.24.0 / libvips v8.9.0 - Caching within libvips disabled to ensure a fair comparison.
+* sharp v0.27.0 / libvips v8.10.5 - Caching within libvips disabled to ensure a fair comparison.
 
 ## The task
 
@@ -18,25 +18,25 @@ then compress to JPEG at a "quality" setting of 80.
 
 ## Test environment
 
-* AWS EC2 eu-west-1 [c5.large](https://aws.amazon.com/ec2/instance-types/c5/) (2x Xeon Platinum 8124M CPU @ 3.00GHz)
-* Ubuntu 18.04 (hvm-ssd/ubuntu-bionic-18.04-amd64-server-20180912 ami-00035f41c82244dab)
-* Node.js v12.14.1
+* AWS EC2 eu-west-1 [c5d.large](https://aws.amazon.com/ec2/instance-types/c5/) (2x Xeon Platinum 8275CL CPU @ 3.00GHz)
+* Ubuntu 20.10 (ami-046cdbcee95cdd75c)
+* Node.js v14.15.3
 
 ## Results
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |
-| jimp               | buffer | buffer |    0.72 |      1.0 |
-| mapnik             | buffer | buffer |    3.02 |      4.2 |
-| gm                 | buffer | buffer |    3.90 |      5.4 |
-| gm                 | file   | file   |    3.94 |      5.5 |
-| imagemagick        | file   | file   |    4.30 |      6.0 |
-| sharp              | stream | stream |   23.65 |     32.8 |
-| sharp              | file   | file   |   24.66 |     34.3 |
-| sharp              | buffer | buffer |   25.14 |     34.9 |
+| jimp               | buffer | buffer |    0.77 |      1.0 |
+| mapnik             | buffer | buffer |    3.39 |      4.4 |
+| gm                 | buffer | buffer |    4.30 |      5.6 |
+| gm                 | file   | file   |    4.33 |      5.6 |
+| imagemagick        | file   | file   |    4.39 |      5.7 |
+| sharp              | stream | stream |   23.81 |     30.9 |
+| sharp              | file   | file   |   25.09 |     32.6 |
+| sharp              | buffer | buffer |   25.60 |     33.2 |
 
 Greater libvips performance can be expected with caching enabled (default)
-and using 8+ core machines, especially those with larger L1/L2 CPU caches.
+and using 4+ core machines, especially those with larger L1/L2 CPU caches.
 
 The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
 

docs/search-index/build.js

@@ -0,0 +1,60 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const { extractDescription, extractKeywords } = require('./extract');
+
+const searchIndex = [];
+
+// Install
+const contents = fs.readFileSync(path.join(__dirname, '..', 'install.md'), 'utf8');
+const matches = contents.matchAll(
+  /## (?<title>[A-Za-z0-9 ]+)\n\n(?<body>[^#]+)/gs
+);
+for (const match of matches) {
+  const { title, body } = match.groups;
+  const description = extractDescription(body);
+
+  searchIndex.push({
+    t: title,
+    d: description,
+    k: extractKeywords(`${title} ${description}`),
+    l: `/install#${title.toLowerCase().replace(/ /g, '-')}`
+  });
+}
+
+// API
+[
+  'constructor',
+  'input',
+  'output',
+  'resize',
+  'composite',
+  'operation',
+  'channel',
+  'colour',
+  'utility'
+].forEach((section) => {
+  const contents = fs.readFileSync(path.join(__dirname, '..', `api-${section}.md`), 'utf8');
+  const matches = contents.matchAll(
+    /\n## (?<title>[A-Za-z]+)\n\n(?<firstparagraph>.+?)\n\n/gs
+  );
+  for (const match of matches) {
+    const { title, firstparagraph } = match.groups;
+    const description = firstparagraph.startsWith('###')
+      ? 'Constructor'
+      : extractDescription(firstparagraph);
+
+    searchIndex.push({
+      t: title,
+      d: description,
+      k: extractKeywords(`${title} ${description}`),
+      l: `/api-${section}#${title.toLowerCase()}`
+    });
+  }
+});
+
+fs.writeFileSync(
+  path.join(__dirname, '..', 'search-index.json'),
+  JSON.stringify(searchIndex)
+);

docs/search-index/extract.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const stopWords = require('./stop-words');
+
+const extractDescription = (str) =>
+  str
+    .replace(/\(http[^)]+/g, '')
+    .replace(/\s+/g, ' ')
+    .replace(/[^A-Za-z0-9_/\-,. ]/g, '')
+    .replace(/\s+/g, ' ')
+    .substr(0, 140)
+    .trim();
+
+const extractKeywords = (str) =>
+  [
+    ...new Set(
+      str
+        .split(/[ -/]/)
+        .map((word) => word.toLowerCase().replace(/[^a-z]/g, ''))
+        .filter((word) => word.length > 2 && word.length < 15 && !stopWords.includes(word))
+    )
+  ].join(' ');
+
+module.exports = { extractDescription, extractKeywords };

docs/search-index/stop-words.js

@@ -0,0 +1,73 @@
+'use strict';
+
+module.exports = [
+  'about',
+  'after',
+  'all',
+  'already',
+  'alternative',
+  'always',
+  'and',
+  'any',
+  'are',
+  'been',
+  'before',
+  'can',
+  'containing',
+  'default',
+  'does',
+  'each',
+  'either',
+  'ensure',
+  'etc',
+  'every',
+  'for',
+  'from',
+  'get',
+  'gets',
+  'given',
+  'has',
+  'have',
+  'how',
+  'image',
+  'its',
+  'may',
+  'more',
+  'most',
+  'much',
+  'must',
+  'non',
+  'not',
+  'occur',
+  'occurs',
+  'over',
+  'perform',
+  'performs',
+  'provide',
+  'provided',
+  'set',
+  'sets',
+  'should',
+  'spelling',
+  'support',
+  'supported',
+  'take',
+  'that',
+  'the',
+  'their',
+  'there',
+  'therefore',
+  'these',
+  'this',
+  'use',
+  'used',
+  'using',
+  'value',
+  'values',
+  'when',
+  'which',
+  'while',
+  'will',
+  'with',
+  'without'
+];

install/dll-copy.js

@@ -4,18 +4,20 @@ const fs = require('fs');
 const path = require('path');
 
 const libvips = require('../lib/libvips');
-const npmLog = require('npmlog');
 
-if (process.platform === 'win32') {
+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}`);
+  libvips.log(`Creating ${buildReleaseDir}`);
   try {
     libvips.mkdirSync(buildDir);
     libvips.mkdirSync(buildReleaseDir);
   } catch (err) {}
-  const vendorLibDir = path.join(__dirname, '..', 'vendor', 'lib');
-  npmLog.info('sharp', `Copying DLLs from ${vendorLibDir} to ${buildReleaseDir}`);
+  const vendorLibDir = path.join(__dirname, '..', 'vendor', minimumLibvipsVersion, 'lib');
+  libvips.log(`Copying DLLs from ${vendorLibDir} to ${buildReleaseDir}`);
   try {
     fs
       .readdirSync(vendorLibDir)
@@ -29,6 +31,7 @@ if (process.platform === 'win32') {
         );
       });
   } catch (err) {
-    npmLog.error('sharp', err.message);
+    libvips.log(err);
+    process.exit(1);
   }
 }

install/libvips.js

@@ -3,12 +3,13 @@
 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 tar = require('tar');
+const tarFs = require('tar-fs');
 
 const agent = require('../lib/agent');
 const libvips = require('../lib/libvips');
@@ -20,45 +21,67 @@ const minimumGlibcVersionByArch = {
   x64: '2.17'
 };
 
+const hasSharpPrebuild = [
+  'darwin-x64',
+  'linux-arm64',
+  'linux-x64',
+  'linuxmusl-x64',
+  'linuxmusl-arm64',
+  'win32-ia32',
+  'win32-x64'
+];
+
 const { minimumLibvipsVersion, minimumLibvipsVersionLabelled } = libvips;
-const distBaseUrl = process.env.npm_config_sharp_dist_base_url || process.env.SHARP_DIST_BASE_URL || `https://github.com/lovell/sharp-libvips/releases/download/v${minimumLibvipsVersionLabelled}/`;
+const distHost = process.env.npm_config_sharp_libvips_binary_host || 'https://github.com/lovell/sharp-libvips/releases/download';
+const distBaseUrl = process.env.npm_config_sharp_dist_base_url || process.env.SHARP_DIST_BASE_URL || `${distHost}/v${minimumLibvipsVersionLabelled}/`;
+const supportsBrotli = ('BrotliDecompress' in zlib);
 
 const fail = function (err) {
-  npmLog.error('sharp', err.message);
+  libvips.log(err);
   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');
+    libvips.log('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');
+  libvips.log('Attempting to build from source via node-gyp but this may fail due to the above error');
+  libvips.log('Please see https://sharp.pixelplumbing.com/install for required dependencies');
   process.exit(1);
 };
 
-const extractTarball = function (tarPath) {
+const extractTarball = function (tarPath, platformAndArch) {
   const vendorPath = path.join(__dirname, '..', 'vendor');
   libvips.mkdirSync(vendorPath);
-  tar
-    .extract({
-      file: tarPath,
-      cwd: vendorPath,
-      strict: true
-    })
-    .catch(function (err) {
-      if (/unexpected end of file/.test(err.message)) {
-        npmLog.error('sharp', `Please delete ${tarPath} as it is not a valid tarball`);
+  const versionedVendorPath = path.join(vendorPath, minimumLibvipsVersion);
+  libvips.mkdirSync(versionedVendorPath);
+
+  const ignoreVendorInclude = hasSharpPrebuild.includes(platformAndArch) && !process.env.npm_config_build_from_source;
+  const ignore = function (name) {
+    return ignoreVendorInclude && name.includes('include/');
+  };
+
+  stream.pipeline(
+    fs.createReadStream(tarPath),
+    supportsBrotli ? new zlib.BrotliDecompress() : new zlib.Gunzip(),
+    tarFs.extract(versionedVendorPath, { ignore }),
+    function (err) {
+      if (err) {
+        if (/unexpected end of file/.test(err.message)) {
+          fail(new Error(`Please delete ${tarPath} as it is not a valid tarball`));
+        }
+        fail(err);
       }
-      fail(err);
-    });
+    }
+  );
 };
 
 try {
   const useGlobalLibvips = libvips.useGlobalLibvips();
+
   if (useGlobalLibvips) {
     const globalLibvipsVersion = libvips.globalLibvipsVersion();
-    npmLog.info('sharp', `Detected globally-installed libvips v${globalLibvipsVersion}`);
-    npmLog.info('sharp', 'Building from source via node-gyp');
+    libvips.log(`Detected globally-installed libvips v${globalLibvipsVersion}`);
+    libvips.log('Building from source via node-gyp');
     process.exit(1);
   } else if (libvips.hasVendoredLibvips()) {
-    npmLog.info('sharp', `Using existing vendored libvips v${minimumLibvipsVersion}`);
+    libvips.log(`Using existing vendored libvips v${minimumLibvipsVersion}`);
   } else {
     // Is this arch/platform supported?
     const arch = process.env.npm_config_arch || process.arch;
@@ -66,6 +89,9 @@ try {
     if (arch === 'ia32' && !platformAndArch.startsWith('win32')) {
       throw new Error(`Intel Architecture 32-bit systems require manual installation of libvips >= ${minimumLibvipsVersion}`);
     }
+    if (platformAndArch === 'darwin-arm64') {
+      throw new Error("Please run 'brew install vips' to install libvips on Apple M1 (ARM64) systems");
+    }
     if (platformAndArch === 'freebsd-x64' || platformAndArch === 'openbsd-x64' || platformAndArch === 'sunos-x64') {
       throw new Error(`BSD/SunOS systems require manual installation of libvips >= ${minimumLibvipsVersion}`);
     }
@@ -74,17 +100,28 @@ try {
         throw new Error(`Use with glibc ${detectLibc.version} requires manual installation of libvips >= ${minimumLibvipsVersion}`);
       }
     }
+    if (detectLibc.family === detectLibc.MUSL && detectLibc.version) {
+      if (semver.lt(detectLibc.version, '1.1.24')) {
+        throw new Error(`Use with musl ${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.gz';
+    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);
+      libvips.log(`Using cached ${tarPathCache}`);
+      extractTarball(tarPathCache, platformAndArch);
     } else {
-      const tarPathTemp = path.join(os.tmpdir(), `${process.pid}-${tarFilename}`);
-      const tmpFile = fs.createWriteStream(tarPathTemp);
       const url = distBaseUrl + tarFilename;
-      npmLog.info('sharp', `Downloading ${url}`);
+      libvips.log(`Downloading ${url}`);
       simpleGet({ url: url, agent: agent() }, function (err, response) {
         if (err) {
           fail(err);
@@ -93,24 +130,37 @@ try {
         } else if (response.statusCode !== 200) {
           fail(new Error(`Status ${response.statusCode} ${response.statusMessage}`));
         } else {
+          const tarPathTemp = path.join(os.tmpdir(), `${process.pid}-${tarFilename}`);
+          const tmpFileStream = fs.createWriteStream(tarPathTemp);
           response
-            .on('error', fail)
-            .pipe(tmpFile);
+            .on('error', function (err) {
+              tmpFileStream.destroy(err);
+            })
+            .on('close', function () {
+              if (!response.complete) {
+                tmpFileStream.destroy(new Error('Download incomplete (connection was terminated)'));
+              }
+            })
+            .pipe(tmpFileStream);
+          tmpFileStream
+            .on('error', function (err) {
+              // Clean up temporary file
+              fs.unlinkSync(tarPathTemp);
+              fail(err);
+            })
+            .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);
+            });
         }
       });
-      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) {

lib/channel.js

@@ -60,22 +60,19 @@ function ensureAlpha () {
  *     // green.jpg is a greyscale image containing the green channel of the input
  *    });
  *
- * @param {Number|String} channel - zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
+ * @param {number|string} channel - zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
  * @returns {Sharp}
  * @throws {Error} Invalid channel
  */
 function extractChannel (channel) {
-  if (channel === 'red') {
-    channel = 0;
-  } else if (channel === 'green') {
-    channel = 1;
-  } else if (channel === 'blue') {
-    channel = 2;
+  const channelMap = { red: 0, green: 1, blue: 2, alpha: 3 };
+  if (Object.keys(channelMap).includes(channel)) {
+    channel = channelMap[channel];
   }
   if (is.integer(channel) && is.inRange(channel, 0, 4)) {
     this.options.extractChannel = channel;
   } else {
-    throw is.invalidParameterError('channel', 'integer or one of: red, green, blue', channel);
+    throw is.invalidParameterError('channel', 'integer or one of: red, green, blue, alpha', channel);
   }
   return this;
 }
@@ -88,10 +85,10 @@ 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).
+ * @param {Array<string|Buffer>|string|Buffer} images - one or more images (file paths, Buffers).
  * @param {Object} options - image options, see `sharp()` constructor.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -119,7 +116,7 @@ function joinChannel (images, options) {
  *     // then `O(1,1) = 0b11110111 & 0b10101010 & 0b00001111 = 0b00000010 = 2`.
  *   });
  *
- * @param {String} boolOp - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+ * @param {string} boolOp - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */

lib/colour.js

@@ -19,7 +19,7 @@ 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.
  *
- * @param {String|Object} rgb - parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values.
+ * @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
  */
@@ -57,7 +57,14 @@ function grayscale (grayscale) {
 /**
  * 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/master/libvips/iofuncs/enumtypes.c#L568)
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -71,7 +78,7 @@ function toColourspace (colourspace) {
 
 /**
  * Alternative spelling of `toColourspace`.
- * @param {String} [colorspace] - output colorspace.
+ * @param {string} [colorspace] - output colorspace.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -82,8 +89,8 @@ function toColorspace (colorspace) {
 /**
  * Update a colour attribute of the this.options Object.
  * @private
- * @param {String} key
- * @param {String|Object} value
+ * @param {string} key
+ * @param {string|Object} value
  * @throws {Error} Invalid value
  */
 function _setBackgroundColourOption (key, value) {

lib/composite.js

@@ -72,7 +72,7 @@ const blend = {
  *   });
  *
  * @param {Object[]} images - Ordered list of images to composite
- * @param {Buffer|String} [images[].input] - Buffer containing image data, String containing the path to an image file, or Create object (see bellow)
+ * @param {Buffer|String} [images[].input] - Buffer containing image data, String containing the path to an image file, or Create object (see below)
  * @param {Object} [images[].input.create] - describes a blank overlay to be created.
  * @param {Number} [images[].input.create.width]
  * @param {Number} [images[].input.create.height]
@@ -100,16 +100,14 @@ function composite (images) {
     if (!is.object(image)) {
       throw is.invalidParameterError('image to composite', 'object', image);
     }
-    const { raw, density, limitInputPixels, sequentialRead } = image;
-    const inputOptions = [raw, density, limitInputPixels, sequentialRead].some(is.defined)
-      ? { raw, density, limitInputPixels, sequentialRead }
-      : undefined;
+    const inputOptions = this._inputOptionsFromObject(image);
     const composite = {
       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
     };
@@ -128,21 +126,23 @@ 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)) {

lib/constructor.js

@@ -18,12 +18,10 @@ try {
     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'
+      '  "npm install --ignore-scripts=false --verbose sharp" and look for errors'
     );
   }
   help.push(
@@ -38,15 +36,20 @@ try {
 const debuglog = util.debuglog('sharp');
 
 /**
- * @constructs 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, 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](http://nodejs.org/api/stream.html#stream_class_stream_duplex) class.
  *
+ * @constructs Sharp
+ *
+ * @emits Sharp#info
+ * @emits Sharp#warning
+ *
  * @example
  * sharp('input.jpg')
  *   .resize(300, 200)
@@ -81,30 +84,69 @@ const debuglog = util.debuglog('sharp');
  * .toBuffer()
  * .then( ... );
  *
- * @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
+ * // Convert an animated GIF to an animated WebP
+ * await sharp('in.gif', { animated: true }).toFile('out.webp');
+ *
+ * @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');
+ *
+ * @param {(Buffer|Uint8Array|Uint8ClampedArray|string)} [input] - if present, can be
+ *  a Buffer / Uint8Array / Uint8ClampedArray containing JPEG, PNG, WebP, AVIF, GIF, SVG, TIFF or 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.
+ * @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 {Number|Boolean} [options.limitInputPixels=268402689] - Do not process input images where the number of pixels
+ * @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.
+ * @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 {Number} [options.density=72] - number representing the DPI for vector images.
- * @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.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, WebP, AVIF, TIFF, PDF), use -1 for all pages.
+ * @param {number} [options.page=0] - page number to start extracting from for multi-page input (GIF, WebP, AVIF, TIFF, PDF), zero based.
+ * @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 {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 {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 {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 {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.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -144,6 +186,13 @@ const Sharp = function (input, options) {
     extendRight: 0,
     extendBackground: [0, 0, 0, 255],
     withoutEnlargement: false,
+    affineMatrix: [],
+    affineBackground: [0, 0, 0, 255],
+    affineIdx: 0,
+    affineIdy: 0,
+    affineOdx: 0,
+    affineOdy: 0,
+    affineInterpolator: this.constructor.interpolators.bilinear,
     kernel: 'lanczos3',
     fastShrinkOnLoad: true,
     // operations
@@ -181,6 +230,7 @@ const Sharp = function (input, options) {
     streamOut: false,
     withMetadata: false,
     withMetadataOrientation: -1,
+    withMetadataIcc: '',
     resolveWithObject: false,
     // output format
     jpegQuality: 80,
@@ -192,7 +242,7 @@ const Sharp = function (input, options) {
     jpegOptimiseCoding: true,
     jpegQuantisationTable: 0,
     pngProgressive: false,
-    pngCompressionLevel: 9,
+    pngCompressionLevel: 6,
     pngAdaptiveFiltering: false,
     pngPalette: false,
     pngQuality: 100,
@@ -208,15 +258,17 @@ const Sharp = function (input, options) {
     tiffCompression: 'jpeg',
     tiffPredictor: 'horizontal',
     tiffPyramid: false,
-    tiffSquash: false,
+    tiffBitdepth: 8,
     tiffTile: false,
     tiffTileHeight: 256,
     tiffTileWidth: 256,
     tiffXres: 1.0,
     tiffYres: 1.0,
-    heifQuality: 80,
+    heifQuality: 50,
     heifLossless: false,
-    heifCompression: 'hevc',
+    heifCompression: 'av1',
+    heifSpeed: 5,
+    heifChromaSubsampling: '4:2:0',
     tileSize: 256,
     tileOverlap: 0,
     tileContainer: 'fs',
@@ -226,10 +278,15 @@ const Sharp = function (input, options) {
     tileAngle: 0,
     tileSkipBlanks: -1,
     tileBackground: [255, 255, 255, 255],
+    tileCentre: false,
+    tileId: 'https://example.com/iiif',
     linearA: 1,
     linearB: 0,
     // Function to notify of libvips warnings
-    debuglog: debuglog,
+    debuglog: warning => {
+      this.emit('warning', warning);
+      debuglog(warning);
+    },
     // Function to notify of queue length changes
     queueListener: function (queueLength) {
       Sharp.queue.emit('change', queueLength);
@@ -253,6 +310,54 @@ util.inherits(Sharp, stream.Duplex);
  * // firstWritableStream receives auto-rotated, resized readableStream
  * // secondWritableStream receives auto-rotated, extracted region of readableStream
  *
+ * @example
+ * // 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 promises = [];
+ *
+ * promises.push(
+ *   sharpStream
+ *     .clone()
+ *     .jpeg({ quality: 100 })
+ *     .toFile("originalFile.jpg")
+ * );
+ *
+ * promises.push(
+ *   sharpStream
+ *     .clone()
+ *     .resize({ width: 500 })
+ *     .jpeg({ quality: 80 })
+ *     .toFile("optimized-500.jpg")
+ * );
+ *
+ * promises.push(
+ *   sharpStream
+ *     .clone()
+ *     .resize({ width: 500 })
+ *     .webp({ quality: 80 })
+ *     .toFile("optimized-500.webp")
+ * );
+ *
+ * // https://github.com/sindresorhus/got#gotstreamurl-options
+ * got.stream("https://www.example.com/some-file.jpg").pipe(sharpStream);
+ *
+ * Promise.all(promises)
+ *   .then(res => { console.log("Done!", res); })
+ *   .catch(err => {
+ *     console.error("Error processing files, let's clean it up", err);
+ *     try {
+ *       fs.unlinkSync("originalFile.jpg");
+ *       fs.unlinkSync("optimized-500.jpg");
+ *       fs.unlinkSync("optimized-500.webp");
+ *     } catch (e) {}
+ *   });
+ *
  * @returns {Sharp}
  */
 function clone () {

lib/input.js

@@ -4,6 +4,17 @@ const color = require('color');
 const is = require('./is');
 const sharp = require('../build/Release/sharp.node');
 
+/**
+ * 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 }
+    : undefined;
+}
+
 /**
  * Create Object containing input and input-related options.
  * @private
@@ -20,15 +31,18 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
   } else if (is.buffer(input)) {
     // Buffer
     inputDescriptor.buffer = input;
+  } else if (is.uint8Array(input)) {
+    // Uint8Array or Uint8ClampedArray
+    inputDescriptor.buffer = Buffer.from(input.buffer);
   } else if (is.plainObject(input) && !is.defined(inputOptions)) {
     // Plain Object descriptor, e.g. create
     inputOptions = input;
-    if (is.plainObject(inputOptions.raw) || is.bool(inputOptions.failOnError)) {
-      // Raw Stream
+    if (_inputOptionsFromObject(inputOptions)) {
+      // Stream with options
       inputDescriptor.buffer = [];
     }
   } else if (!is.defined(input) && !is.defined(inputOptions) && is.object(containerOptions) && containerOptions.allowStream) {
-    // Stream
+    // Stream without options
     inputDescriptor.buffer = [];
   } else {
     throw new Error(`Unsupported input '${input}' of type ${typeof input}${
@@ -46,10 +60,10 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
     }
     // Density
     if (is.defined(inputOptions.density)) {
-      if (is.inRange(inputOptions.density, 1, 2400)) {
+      if (is.inRange(inputOptions.density, 1, 100000)) {
         inputDescriptor.density = inputOptions.density;
       } else {
-        throw is.invalidParameterError('density', 'number between 1 and 2400', inputOptions.density);
+        throw is.invalidParameterError('density', 'number between 1 and 100000', inputOptions.density);
       }
     }
     // limitInputPixels
@@ -88,6 +102,13 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
       }
     }
     // Multi-page input (GIF, TIFF, PDF)
+    if (is.defined(inputOptions.animated)) {
+      if (is.bool(inputOptions.animated)) {
+        inputDescriptor.pages = inputOptions.animated ? -1 : 1;
+      } else {
+        throw is.invalidParameterError('animated', 'boolean', inputOptions.animated);
+      }
+    }
     if (is.defined(inputOptions.pages)) {
       if (is.integer(inputOptions.pages) && is.inRange(inputOptions.pages, -1, 100000)) {
         inputDescriptor.pages = inputOptions.pages;
@@ -102,28 +123,64 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         throw is.invalidParameterError('page', 'integer between 0 and 100000', inputOptions.page);
       }
     }
+    // Multi-level input (OpenSlide)
+    if (is.defined(inputOptions.level)) {
+      if (is.integer(inputOptions.level) && is.inRange(inputOptions.level, 0, 256)) {
+        inputDescriptor.level = inputOptions.level;
+      } else {
+        throw is.invalidParameterError('level', 'integer between 0 and 256', inputOptions.level);
+      }
+    }
     // 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');
       }
     }
   } else if (is.defined(inputOptions)) {
@@ -136,7 +193,7 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
  * Handle incoming Buffer chunk on Writable Stream.
  * @private
  * @param {Buffer} chunk
- * @param {String} encoding - unused
+ * @param {string} encoding - unused
  * @param {Function} callback
  */
 function _write (chunk, encoding, callback) {
@@ -172,7 +229,7 @@ function _flattenBufferIn () {
 /**
  * Are we expecting Stream-based input?
  * @private
- * @returns {Boolean}
+ * @returns {boolean}
  */
 function _isStreamInput () {
   return Array.isArray(this.options.input.buffer);
@@ -197,6 +254,7 @@ function _isStreamInput () {
  * - `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
@@ -279,6 +337,8 @@ function metadata (callback) {
  *     - `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)
  *
  * @example
  * const image = sharp(inputJpg);
@@ -288,6 +348,10 @@ function metadata (callback) {
  *      // stats contains the channel-wise statistics array and the isOpaque value
  *   });
  *
+ * @example
+ * const { entropy, sharpness, dominant } = await sharp(input).stats();
+ * const { r, g, b } = dominant;
+ *
  * @param {Function} [callback] - called with the arguments `(err, stats)`
  * @returns {Promise<Object>}
  */
@@ -337,6 +401,7 @@ function stats (callback) {
 module.exports = function (Sharp) {
   Object.assign(Sharp.prototype, {
     // Private
+    _inputOptionsFromObject,
     _createInputDescriptor,
     _write,
     _flattenBufferIn,

lib/is.js

@@ -21,7 +21,7 @@ const object = function (val) {
  * @private
  */
 const plainObject = function (val) {
-  return object(val) && Object.prototype.toString.call(val) === '[object Object]';
+  return Object.prototype.toString.call(val) === '[object Object]';
 };
 
 /**
@@ -45,7 +45,16 @@ const bool = function (val) {
  * @private
  */
 const buffer = function (val) {
-  return object(val) && val instanceof Buffer;
+  return val instanceof Buffer;
+};
+
+/**
+ * Is this value a Uint8Array or Uint8ClampedArray object?
+ * @private
+ */
+const uint8Array = function (val) {
+  // allow both since Uint8ClampedArray simply clamps the values between 0-255
+  return val instanceof Uint8Array || val instanceof Uint8ClampedArray;
 };
 
 /**
@@ -69,7 +78,7 @@ const number = function (val) {
  * @private
  */
 const integer = function (val) {
-  return number(val) && val % 1 === 0;
+  return Number.isInteger(val);
 };
 
 /**
@@ -85,14 +94,14 @@ const inRange = function (val, min, max) {
  * @private
  */
 const inArray = function (val, list) {
-  return list.indexOf(val) !== -1;
+  return list.includes(val);
 };
 
 /**
  * Create an Error with a message relating to an invalid parameter.
  *
- * @param {String} name - parameter name.
- * @param {String} expected - description of the type/value/range expected.
+ * @param {string} name - parameter name.
+ * @param {string} expected - description of the type/value/range expected.
  * @param {*} actual - the value received.
  * @returns {Error} Containing the formatted message.
  * @private
@@ -110,6 +119,7 @@ module.exports = {
   fn: fn,
   bool: bool,
   buffer: buffer,
+  uint8Array: uint8Array,
   string: string,
   number: number,
   integer: integer,

lib/libvips.js

@@ -37,10 +37,28 @@ const cachePath = function () {
   return libvipsCachePath;
 };
 
+const log = function (item) {
+  if (item instanceof Error) {
+    console.error(`sharp: ${item.message}`);
+  } else {
+    console.log(`sharp: ${item}`);
+  }
+};
+
+const isRosetta = function () {
+  /* istanbul ignore next */
+  if (process.platform === 'darwin' && process.arch === 'x64') {
+    const translated = spawnSync('sysctl sysctl.proc_translated', spawnSyncOptions).stdout;
+    return (translated || '').trim() === 'sysctl.proc_translated: 1';
+  }
+  return false;
+};
+
 const globalLibvipsVersion = function () {
   if (process.platform !== 'win32') {
-    const globalLibvipsVersion = spawnSync(`PKG_CONFIG_PATH="${pkgConfigPath()}" pkg-config --modversion vips-cpp`, spawnSyncOptions).stdout || '';
-    return globalLibvipsVersion.trim();
+    const globalLibvipsVersion = spawnSync(`PKG_CONFIG_PATH="${pkgConfigPath()}" pkg-config --modversion vips-cpp`, spawnSyncOptions).stdout;
+    /* istanbul ignore next */
+    return (globalLibvipsVersion || '').trim();
   } else {
     return '';
   }
@@ -48,24 +66,18 @@ const globalLibvipsVersion = function () {
 
 const hasVendoredLibvips = function () {
   const currentPlatformId = platform();
-  const vendorPath = path.join(__dirname, '..', 'vendor');
-  let vendorVersionId;
+  const vendorPath = path.join(__dirname, '..', 'vendor', minimumLibvipsVersion);
   let vendorPlatformId;
   try {
-    vendorVersionId = require(path.join(vendorPath, 'versions.json')).vips;
     vendorPlatformId = require(path.join(vendorPath, 'platform.json'));
   } catch (err) {}
-  /* istanbul ignore if */
-  if (vendorVersionId && vendorVersionId !== minimumLibvipsVersion) {
-    throw new Error(`Found vendored libvips v${vendorVersionId} but require v${minimumLibvipsVersion}. Please remove the 'node_modules/sharp/vendor' directory and run 'npm install'.`);
-  }
   /* 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/vendor' directory and run 'npm install'.`);
+      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;
@@ -87,7 +99,10 @@ const useGlobalLibvips = function () {
   if (Boolean(env.SHARP_IGNORE_GLOBAL_LIBVIPS) === true) {
     return false;
   }
-
+  /* istanbul ignore next */
+  if (isRosetta()) {
+    return false;
+  }
   const globalVipsVersion = globalLibvipsVersion();
   return !!globalVipsVersion && /* istanbul ignore next */
     semver.gte(globalVipsVersion, minimumLibvipsVersion);
@@ -97,6 +112,7 @@ module.exports = {
   minimumLibvipsVersion,
   minimumLibvipsVersionLabelled,
   cachePath,
+  log,
   globalLibvipsVersion,
   hasVendoredLibvips,
   pkgConfigPath,

lib/operation.js

@@ -32,9 +32,9 @@ const is = require('./is');
  *   });
  * readableStream.pipe(pipeline);
  *
- * @param {Number} [angle=auto] angle of rotation.
+ * @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.
+ * @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.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -82,15 +82,112 @@ function flop (flop) {
   return this;
 }
 
+/**
+ * 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`.
+ *
+ * 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`
+ *
+ * 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.
+ *
+ * @since 0.27.0
+ *
+ * @example
+ * const pipeline = sharp()
+ *   .affine([[1, 0.3], [0.1, 0.7]], {
+ *      background: 'white',
+ *      interpolate: sharp.interpolators.nohalo
+ *   })
+ *   .toBuffer((err, outputBuffer, info) => {
+ *      // outputBuffer contains the transformed image
+ *      // info.width and info.height contain the new dimensions
+ *   });
+ *
+ * inputStream
+ *   .pipe(pipeline);
+ *
+ * @param {Array<Array<number>>|Array<number>} matrix - affine transformation matrix
+ * @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.
+ * @param {Number} [options.idx=0] - input horizontal offset
+ * @param {Number} [options.idy=0] - input vertical offset
+ * @param {Number} [options.odx=0] - output horizontal offset
+ * @param {Number} [options.ody=0] - output vertical offset
+ * @param {String} [options.interpolator=sharp.interpolators.bicubic] - interpolator
+ * @returns {Sharp}
+ * @throws {Error} Invalid parameters
+ */
+function affine (matrix, options) {
+  const flatMatrix = [].concat(...matrix);
+  if (flatMatrix.length === 4 && flatMatrix.every(is.number)) {
+    this.options.affineMatrix = flatMatrix;
+  } else {
+    throw is.invalidParameterError('matrix', '1x4 or 2x2 array', matrix);
+  }
+
+  if (is.defined(options)) {
+    if (is.object(options)) {
+      this._setBackgroundColourOption('affineBackground', options.background);
+      if (is.defined(options.idx)) {
+        if (is.number(options.idx)) {
+          this.options.affineIdx = options.idx;
+        } else {
+          throw is.invalidParameterError('options.idx', 'number', options.idx);
+        }
+      }
+      if (is.defined(options.idy)) {
+        if (is.number(options.idy)) {
+          this.options.affineIdy = options.idy;
+        } else {
+          throw is.invalidParameterError('options.idy', 'number', options.idy);
+        }
+      }
+      if (is.defined(options.odx)) {
+        if (is.number(options.odx)) {
+          this.options.affineOdx = options.odx;
+        } else {
+          throw is.invalidParameterError('options.odx', 'number', options.odx);
+        }
+      }
+      if (is.defined(options.ody)) {
+        if (is.number(options.ody)) {
+          this.options.affineOdy = options.ody;
+        } else {
+          throw is.invalidParameterError('options.ody', 'number', options.ody);
+        }
+      }
+      if (is.defined(options.interpolator)) {
+        if (is.inArray(options.interpolator, Object.values(this.constructor.interpolators))) {
+          this.options.affineInterpolator = options.interpolator;
+        } else {
+          throw is.invalidParameterError('options.interpolator', 'valid interpolator name', options.interpolator);
+        }
+      }
+    } else {
+      throw is.invalidParameterError('options', 'object', options);
+    }
+  }
+
+  return this;
+}
+
 /**
  * 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.
+ * @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.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -129,7 +226,7 @@ function sharpen (sigma, flat, jagged) {
 /**
  * Apply median filter.
  * When used without parameters the default window is 3x3.
- * @param {Number} [size=3] square mask size: size x size
+ * @param {number} [size=3] square mask size: size x size
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -150,7 +247,7 @@ function median (size) {
  * Blur the image.
  * When used without parameters, performs a fast, mild blur of the output image.
  * When a `sigma` is provided, performs a slower, more accurate Gaussian blur.
- * @param {Number} [sigma] a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+ * @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
  */
@@ -173,7 +270,7 @@ function blur (sigma) {
 /**
  * Merge alpha transparency channel, if any, with a background.
  * @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.
+ * @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}
  */
 function flatten (options) {
@@ -193,8 +290,8 @@ function flatten (options) {
  *
  * Supply a second argument to use a different output gamma value, otherwise the first value is used in both cases.
  *
- * @param {Number} [gamma=2.2] value between 1.0 and 3.0.
- * @param {Number} [gammaOut] value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
+ * @param {number} [gamma=2.2] value between 1.0 and 3.0.
+ * @param {number} [gammaOut] value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -264,11 +361,11 @@ 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 {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.
+ * @param {number} kernel.width - width of the kernel in pixels.
+ * @param {number} kernel.height - width 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.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -300,7 +397,7 @@ 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.
- * @param {Number} [threshold=128] - a value in the range 0-255 representing the level at which the threshold will be applied.
+ * @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.
  * @param {Boolean} [options.grayscale=true] - alternative spelling for greyscale.
@@ -331,13 +428,13 @@ function threshold (threshold, options) {
  * 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.
  *
- * @param {Buffer|String} operand - Buffer containing image data or String containing the path to an image file.
- * @param {String} operator - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+ * @param {Buffer|string} operand - Buffer containing image data or string containing the path to an image file.
+ * @param {string} operator - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
  * @param {Object} [options]
  * @param {Object} [options.raw] - describes operand when using raw pixel data.
- * @param {Number} [options.raw.width]
- * @param {Number} [options.raw.height]
- * @param {Number} [options.raw.channels]
+ * @param {number} [options.raw.width]
+ * @param {number} [options.raw.height]
+ * @param {number} [options.raw.channels]
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -353,8 +450,8 @@ 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
+ * @param {number} [a=1.0] multiplier
+ * @param {number} [b=0.0] offset
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -394,7 +491,7 @@ function linear (a, b) {
  *     // With this example input, a sepia filter has been applied
  *   });
  *
- * @param {Array<Array<Number>>} 3x3 Recombination matrix
+ * @param {Array<Array<number>>} inputMatrix - 3x3 Recombination matrix
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -440,9 +537,9 @@ function recomb (inputMatrix) {
  *   });
  *
  * @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.brightness] Brightness multiplier
+ * @param {number} [options.saturation] Saturation multiplier
+ * @param {number} [options.hue] Degrees for hue rotation
  * @returns {Sharp}
  */
 function modulate (options) {
@@ -482,6 +579,7 @@ module.exports = function (Sharp) {
     rotate,
     flip,
     flop,
+    affine,
     sharpen,
     median,
     blur,

lib/output.js

@@ -6,19 +6,23 @@ const sharp = require('../build/Release/sharp.node');
 const formats = new Map([
   ['heic', 'heif'],
   ['heif', 'heif'],
+  ['avif', 'avif'],
   ['jpeg', 'jpeg'],
   ['jpg', 'jpeg'],
   ['png', 'png'],
   ['raw', 'raw'],
   ['tiff', 'tiff'],
-  ['webp', 'webp']
+  ['webp', 'webp'],
+  ['gif', 'gif']
 ]);
 
+const errMagickSave = new Error('GIF output requires libvips with support for ImageMagick');
+
 /**
  * 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, 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.
@@ -36,7 +40,7 @@ const formats = new Map([
  *   .then(info => { ... })
  *   .catch(err => { ... });
  *
- * @param {String} fileOut - the path to write the image data to.
+ * @param {string} fileOut - the path to write the image data to.
  * @param {Function} [callback] - 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).
@@ -45,32 +49,30 @@ const formats = new Map([
  * @throws {Error} Invalid parameters
  */
 function toFile (fileOut, callback) {
-  if (!fileOut || fileOut.length === 0) {
-    const errOutputInvalid = new Error('Missing output file path');
+  let err;
+  if (!is.string(fileOut)) {
+    err = new Error('Missing output file path');
+  } else if (this.options.input.file === fileOut) {
+    err = new Error('Cannot use same file for input and output');
+  } else if (this.options.formatOut === 'input' && fileOut.toLowerCase().endsWith('.gif') && !this.constructor.format.magick.output.file) {
+    err = errMagickSave;
+  }
+  if (err) {
     if (is.fn(callback)) {
-      callback(errOutputInvalid);
+      callback(err);
     } else {
-      return Promise.reject(errOutputInvalid);
+      return Promise.reject(err);
     }
   } else {
-    if (this.options.input.file === fileOut) {
-      const errOutputIsInput = new Error('Cannot use same file for input and output');
-      if (is.fn(callback)) {
-        callback(errOutputIsInput);
-      } else {
-        return Promise.reject(errOutputIsInput);
-      }
-    } else {
-      this.options.fileOut = fileOut;
-      return this._pipeline(callback);
-    }
+    this.options.fileOut = fileOut;
+    return this._pipeline(callback);
   }
   return this;
 }
 
 /**
  * Write output to a Buffer.
- * JPEG, PNG, WebP, TIFF and RAW output are supported.
+ * JPEG, PNG, WebP, AVIF, TIFF 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.
  *
@@ -102,8 +104,22 @@ function toFile (fileOut, callback) {
  *   .then(({ data, info }) => { ... })
  *   .catch(err => { ... });
  *
+ * @example
+ * const data = await sharp('my-image.jpg')
+ *   // output the raw pixels
+ *   .raw()
+ *   .toBuffer();
+ *
+ * // 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
+ * await sharp(pixelArray).toFile('my-changed-image.jpg');
+ *
  * @param {Object} [options]
- * @param {Boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
+ * @param {boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
  * @param {Function} [callback]
  * @returns {Promise<Buffer>} - when no callback is provided
  */
@@ -118,8 +134,11 @@ function toBuffer (options, callback) {
 
 /**
  * Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
- * The default behaviour, when `withMetadata` is not used, is to strip all metadata and convert to the device-independent sRGB colour space.
- * This will also convert to and add a web-friendly sRGB ICC profile.
+ * This will also convert to and add a web-friendly sRGB ICC profile 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.
  *
  * @example
  * sharp('input.jpg')
@@ -128,7 +147,8 @@ function toBuffer (options, callback) {
  *   .then(info => { ... });
  *
  * @param {Object} [options]
- * @param {Number} [options.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
+ * @param {number} [options.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
+ * @param {string} [options.icc] filesystem path to output ICC profile, defaults to sRGB.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -142,6 +162,13 @@ function withMetadata (options) {
         throw is.invalidParameterError('orientation', 'integer between 1 and 8', options.orientation);
       }
     }
+    if (is.defined(options.icc)) {
+      if (is.string(options.icc)) {
+        this.options.withMetadataIcc = options.icc;
+      } else {
+        throw is.invalidParameterError('icc', 'string filesystem path to ICC profile', options.icc);
+      }
+    }
   }
   return this;
 }
@@ -155,13 +182,13 @@ function withMetadata (options) {
  *   .toFormat('png')
  *   .toBuffer();
  *
- * @param {(String|Object)} format - as a String or an Object with an 'id' attribute
+ * @param {(string|Object)} format - as a string or an Object with an 'id' attribute
  * @param {Object} options - output options
  * @returns {Sharp}
  * @throws {Error} unsupported format or options
  */
 function toFormat (format, options) {
-  const actualFormat = formats.get(is.object(format) && is.string(format.id) ? format.id : format);
+  const actualFormat = formats.get((is.object(format) && is.string(format.id) ? format.id : format).toLowerCase());
   if (!actualFormat) {
     throw is.invalidParameterError('format', `one of: ${[...formats.keys()].join(', ')}`, format);
   }
@@ -180,19 +207,26 @@ function toFormat (format, options) {
  *   })
  *   .toBuffer();
  *
+ * @example
+ * // Use mozjpeg to reduce output JPEG file size (slower)
+ * const data = await sharp(input)
+ *   .jpeg({ mozjpeg: true })
+ *   .toBuffer();
+ *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
- * @param {String} [options.chromaSubsampling='4:2:0'] - set to '4:4:4' to prevent chroma subsampling when quality <= 90
- * @param {Boolean} [options.trellisQuantisation=false] - apply trellis quantisation, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.overshootDeringing=false] - apply overshoot deringing, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.optimiseScans=false] - optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.optimizeScans=false] - alternative spelling of optimiseScans
- * @param {Boolean} [options.optimiseCoding=true] - optimise Huffman coding tables
- * @param {Boolean} [options.optimizeCoding=true] - alternative spelling of optimiseCoding
- * @param {Number} [options.quantisationTable=0] - quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg
- * @param {Number} [options.quantizationTable=0] - alternative spelling of quantisationTable
- * @param {Boolean} [options.force=true] - force JPEG output, otherwise attempt to use input format
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {boolean} [options.progressive=false] - use progressive (interlace) scan
+ * @param {string} [options.chromaSubsampling='4:2:0'] - set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling
+ * @param {boolean} [options.optimiseCoding=true] - optimise Huffman coding tables
+ * @param {boolean} [options.optimizeCoding=true] - alternative spelling of optimiseCoding
+ * @param {boolean} [options.mozjpeg=false] - use mozjpeg defaults, equivalent to `{ trellisQuantisation: true, overshootDeringing: true, optimiseScans: true, quantisationTable: 3 }`
+ * @param {boolean} [options.trellisQuantisation=false] - apply trellis quantisation
+ * @param {boolean} [options.overshootDeringing=false] - apply overshoot deringing
+ * @param {boolean} [options.optimiseScans=false] - optimise progressive scans, forces progressive
+ * @param {boolean} [options.optimizeScans=false] - alternative spelling of optimiseScans
+ * @param {number} [options.quantisationTable=0] - quantization table to use, integer 0-8
+ * @param {number} [options.quantizationTable=0] - alternative spelling of quantisationTable
+ * @param {boolean} [options.force=true] - force JPEG output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -215,6 +249,23 @@ function jpeg (options) {
         throw is.invalidParameterError('chromaSubsampling', 'one of: 4:2:0, 4:4:4', options.chromaSubsampling);
       }
     }
+    const optimiseCoding = is.bool(options.optimizeCoding) ? options.optimizeCoding : options.optimiseCoding;
+    if (is.defined(optimiseCoding)) {
+      this._setBooleanOption('jpegOptimiseCoding', optimiseCoding);
+    }
+    if (is.defined(options.mozjpeg)) {
+      if (is.bool(options.mozjpeg)) {
+        if (options.mozjpeg) {
+          this.options.jpegTrellisQuantisation = true;
+          this.options.jpegOvershootDeringing = true;
+          this.options.jpegOptimiseScans = true;
+          this.options.jpegProgressive = true;
+          this.options.jpegQuantisationTable = 3;
+        }
+      } else {
+        throw is.invalidParameterError('mozjpeg', 'boolean', options.mozjpeg);
+      }
+    }
     const trellisQuantisation = is.bool(options.trellisQuantization) ? options.trellisQuantization : options.trellisQuantisation;
     if (is.defined(trellisQuantisation)) {
       this._setBooleanOption('jpegTrellisQuantisation', trellisQuantisation);
@@ -229,10 +280,6 @@ function jpeg (options) {
         this.options.jpegProgressive = true;
       }
     }
-    const optimiseCoding = is.bool(options.optimizeCoding) ? options.optimizeCoding : options.optimiseCoding;
-    if (is.defined(optimiseCoding)) {
-      this._setBooleanOption('jpegOptimiseCoding', optimiseCoding);
-    }
     const quantisationTable = is.number(options.quantizationTable) ? options.quantizationTable : options.quantisationTable;
     if (is.defined(quantisationTable)) {
       if (is.integer(quantisationTable) && is.inRange(quantisationTable, 0, 8)) {
@@ -248,25 +295,32 @@ function jpeg (options) {
 /**
  * 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.
  *
  * @example
- * // Convert any input to PNG output
+ * // Convert any input to full colour PNG output
  * const data = await sharp(input)
  *   .png()
  *   .toBuffer();
  *
+ * @example
+ * // Convert any input to indexed PNG output (slower)
+ * const data = await sharp(input)
+ *   .png({ palette: true })
+ *   .toBuffer();
+ *
  * @param {Object} [options]
- * @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
- * @param {Number} [options.compressionLevel=9] - zlib compression level, 0-9
- * @param {Boolean} [options.adaptiveFiltering=false] - use adaptive row filtering
- * @param {Boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant
- * @param {Number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, requires libvips compiled with support for libimagequant
- * @param {Number} [options.colours=256] - maximum number of palette entries, requires libvips compiled with support for libimagequant
- * @param {Number} [options.colors=256] - alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant
- * @param {Number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, requires libvips compiled with support for libimagequant
- * @param {Boolean} [options.force=true] - force PNG output, otherwise attempt to use input format
+ * @param {boolean} [options.progressive=false] - use progressive (interlace) scan
+ * @param {number} [options.compressionLevel=6] - zlib compression level, 0 (fastest, largest) to 9 (slowest, smallest)
+ * @param {boolean} [options.adaptiveFiltering=false] - use adaptive row filtering
+ * @param {boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support
+ * @param {number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, sets `palette` to `true`
+ * @param {number} [options.colours=256] - maximum number of palette entries, sets `palette` to `true`
+ * @param {number} [options.colors=256] - alternative spelling of `options.colours`, sets `palette` to `true`
+ * @param {number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, sets `palette` to `true`
+ * @param {boolean} [options.force=true] - force PNG output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -287,28 +341,30 @@ function png (options) {
     }
     if (is.defined(options.palette)) {
       this._setBooleanOption('pngPalette', options.palette);
-      if (this.options.pngPalette) {
-        if (is.defined(options.quality)) {
-          if (is.integer(options.quality) && is.inRange(options.quality, 0, 100)) {
-            this.options.pngQuality = options.quality;
-          } else {
-            throw is.invalidParameterError('quality', 'integer between 0 and 100', options.quality);
-          }
+    } else if (is.defined(options.quality) || is.defined(options.colours || options.colors) || is.defined(options.dither)) {
+      this._setBooleanOption('pngPalette', true);
+    }
+    if (this.options.pngPalette) {
+      if (is.defined(options.quality)) {
+        if (is.integer(options.quality) && is.inRange(options.quality, 0, 100)) {
+          this.options.pngQuality = options.quality;
+        } else {
+          throw is.invalidParameterError('quality', 'integer between 0 and 100', options.quality);
         }
-        const colours = options.colours || options.colors;
-        if (is.defined(colours)) {
-          if (is.integer(colours) && is.inRange(colours, 2, 256)) {
-            this.options.pngColours = colours;
-          } else {
-            throw is.invalidParameterError('colours', 'integer between 2 and 256', colours);
-          }
+      }
+      const colours = options.colours || options.colors;
+      if (is.defined(colours)) {
+        if (is.integer(colours) && is.inRange(colours, 2, 256)) {
+          this.options.pngColours = colours;
+        } else {
+          throw is.invalidParameterError('colours', 'integer between 2 and 256', colours);
         }
-        if (is.defined(options.dither)) {
-          if (is.number(options.dither) && is.inRange(options.dither, 0, 1)) {
-            this.options.pngDither = options.dither;
-          } else {
-            throw is.invalidParameterError('dither', 'number between 0.0 and 1.0', options.dither);
-          }
+      }
+      if (is.defined(options.dither)) {
+        if (is.number(options.dither) && is.inRange(options.dither, 0, 1)) {
+          this.options.pngDither = options.dither;
+        } else {
+          throw is.invalidParameterError('dither', 'number between 0.0 and 1.0', options.dither);
         }
       }
     }
@@ -326,13 +382,16 @@ function png (options) {
  *   .toBuffer();
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100
- * @param {Boolean} [options.lossless=false] - use lossless compression mode
- * @param {Boolean} [options.nearLossless=false] - use near_lossless compression mode
- * @param {Boolean} [options.smartSubsample=false] - use high quality chroma subsampling
- * @param {Number} [options.reductionEffort=4] - level of CPU effort to reduce file size, integer 0-6
- * @param {Boolean} [options.force=true] - force WebP output, otherwise attempt to use input format
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100
+ * @param {boolean} [options.lossless=false] - use lossless compression mode
+ * @param {boolean} [options.nearLossless=false] - use near_lossless compression mode
+ * @param {boolean} [options.smartSubsample=false] - use high quality chroma subsampling
+ * @param {number} [options.reductionEffort=4] - level of CPU effort to reduce file size, integer 0-6
+ * @param {number} [options.pageHeight] - page height for animated output
+ * @param {number} [options.loop=0] - number of animation iterations, use 0 for infinite animation
+ * @param {number[]} [options.delay] - list of delays between animation frames (in milliseconds)
+ * @param {boolean} [options.force=true] - force WebP output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -367,9 +426,73 @@ function webp (options) {
       throw is.invalidParameterError('reductionEffort', 'integer between 0 and 6', options.reductionEffort);
     }
   }
+
+  trySetAnimationOptions(options, this.options);
   return this._updateFormatOut('webp', options);
 }
 
+/**
+ * Use these GIF options for output image.
+ *
+ * Requires libvips compiled with support for ImageMagick or GraphicsMagick.
+ * The prebuilt binaries do not include this - see
+ * {@link https://sharp.pixelplumbing.com/install#custom-libvips installing a custom libvips}.
+ *
+ * @param {Object} [options] - output options
+ * @param {number} [options.pageHeight] - page height for animated output
+ * @param {number} [options.loop=0] - number of animation iterations, use 0 for infinite animation
+ * @param {number[]} [options.delay] - list of delays between animation frames (in milliseconds)
+ * @param {boolean} [options.force=true] - force GIF output, otherwise attempt to use input format
+ * @returns {Sharp}
+ * @throws {Error} Invalid options
+ */
+/* istanbul ignore next */
+function gif (options) {
+  if (!this.constructor.format.magick.output.buffer) {
+    throw errMagickSave;
+  }
+  trySetAnimationOptions(options, this.options);
+  return this._updateFormatOut('gif', options);
+}
+
+/**
+ * Set animation options if available.
+ * @private
+ *
+ * @param {Object} [source] - output options
+ * @param {number} [source.pageHeight] - page height for animated output
+ * @param {number} [source.loop=0] - number of animation iterations, use 0 for infinite animation
+ * @param {number[]} [source.delay] - list of delays between animation frames (in milliseconds)
+ * @param {Object} [target] - target object for valid options
+ * @throws {Error} Invalid options
+ */
+function trySetAnimationOptions (source, target) {
+  if (is.object(source) && is.defined(source.pageHeight)) {
+    if (is.integer(source.pageHeight) && source.pageHeight > 0) {
+      target.pageHeight = source.pageHeight;
+    } else {
+      throw is.invalidParameterError('pageHeight', 'integer larger than 0', source.pageHeight);
+    }
+  }
+  if (is.object(source) && is.defined(source.loop)) {
+    if (is.integer(source.loop) && is.inRange(source.loop, 0, 65535)) {
+      target.loop = source.loop;
+    } else {
+      throw is.invalidParameterError('loop', 'integer between 0 and 65535', source.loop);
+    }
+  }
+  if (is.object(source) && is.defined(source.delay)) {
+    if (
+      Array.isArray(source.delay) &&
+      source.delay.every(is.integer) &&
+      source.delay.every(v => is.inRange(v, 0, 65535))) {
+      target.delay = source.delay;
+    } else {
+      throw is.invalidParameterError('delay', 'array of integers between 0 and 65535', source.delay);
+    }
+  }
+}
+
 /**
  * Use these TIFF options for output image.
  *
@@ -378,23 +501,23 @@ function webp (options) {
  * sharp('input.svg')
  *   .tiff({
  *     compression: 'lzw',
- *     squash: true
+ *     bitdepth: 1
  *   })
  *   .toFile('1-bpp-output.tiff')
  *   .then(info => { ... });
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
- * @param {Boolean} [options.compression='jpeg'] - compression options: lzw, deflate, jpeg, ccittfax4
- * @param {Boolean} [options.predictor='horizontal'] - compression predictor options: none, horizontal, float
- * @param {Boolean} [options.pyramid=false] - write an image pyramid
- * @param {Boolean} [options.tile=false] - write a tiled tiff
- * @param {Boolean} [options.tileWidth=256] - horizontal tile size
- * @param {Boolean} [options.tileHeight=256] - vertical tile size
- * @param {Number} [options.xres=1.0] - horizontal resolution in pixels/mm
- * @param {Number} [options.yres=1.0] - vertical resolution in pixels/mm
- * @param {Boolean} [options.squash=false] - squash 8-bit images down to 1 bit
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
+ * @param {string} [options.compression='jpeg'] - compression options: lzw, deflate, jpeg, ccittfax4
+ * @param {string} [options.predictor='horizontal'] - compression predictor options: none, horizontal, float
+ * @param {boolean} [options.pyramid=false] - write an image pyramid
+ * @param {boolean} [options.tile=false] - write a tiled tiff
+ * @param {number} [options.tileWidth=256] - horizontal tile size
+ * @param {number} [options.tileHeight=256] - vertical tile size
+ * @param {number} [options.xres=1.0] - horizontal resolution in pixels/mm
+ * @param {number} [options.yres=1.0] - vertical resolution in pixels/mm
+ * @param {number} [options.bitdepth=8] - reduce bitdepth to 1, 2 or 4 bit
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -407,8 +530,12 @@ function tiff (options) {
         throw is.invalidParameterError('quality', 'integer between 1 and 100', options.quality);
       }
     }
-    if (is.defined(options.squash)) {
-      this._setBooleanOption('tiffSquash', options.squash);
+    if (is.defined(options.bitdepth)) {
+      if (is.integer(options.bitdepth) && is.inArray(options.bitdepth, [1, 2, 4, 8])) {
+        this.options.tiffBitdepth = options.bitdepth;
+      } else {
+        throw is.invalidParameterError('bitdepth', '1, 2, 4 or 8', options.bitdepth);
+      }
     }
     // tiling
     if (is.defined(options.tile)) {
@@ -467,29 +594,44 @@ function tiff (options) {
   return this._updateFormatOut('tiff', options);
 }
 
+/**
+ * Use these AVIF options for output image.
+ *
+ * Whilst it is possible to create AVIF images smaller than 16x16 pixels,
+ * most web browsers do not display these properly.
+ *
+ * @since 0.27.0
+ *
+ * @param {Object} [options] - output options
+ * @param {number} [options.quality=50] - quality, integer 1-100
+ * @param {boolean} [options.lossless=false] - use lossless compression
+ * @param {number} [options.speed=5] - CPU effort vs file size, 0 (slowest/smallest) to 8 (fastest/largest)
+ * @param {string} [options.chromaSubsampling='4:2:0'] - set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling, requires libvips v8.11.0
+ * @returns {Sharp}
+ * @throws {Error} Invalid options
+ */
+function avif (options) {
+  return this.heif({ ...options, compression: 'av1' });
+}
+
 /**
  * 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.
+ * Support for patent-encumbered HEIC images requires the use of a
+ * globally-installed libvips compiled with support for libheif, libde265 and x265.
  *
  * @since 0.23.0
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.compression='hevc'] - compression format: hevc, avc, jpeg, av1
- * @param {Boolean} [options.lossless=false] - use lossless compression
+ * @param {number} [options.quality=50] - quality, integer 1-100
+ * @param {string} [options.compression='av1'] - compression format: av1, hevc
+ * @param {boolean} [options.lossless=false] - use lossless compression
+ * @param {number} [options.speed=5] - CPU effort vs file size, 0 (slowest/smallest) to 8 (fastest/largest)
+ * @param {string} [options.chromaSubsampling='4:2:0'] - set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling, requires libvips v8.11.0
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
 function heif (options) {
-  if (!this.constructor.format.heif.output.buffer) {
-    throw new Error('The heif operation requires libvips to have been installed with support for libheif');
-  }
   if (is.object(options)) {
     if (is.defined(options.quality)) {
       if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
@@ -506,10 +648,24 @@ function heif (options) {
       }
     }
     if (is.defined(options.compression)) {
-      if (is.string(options.compression) && is.inArray(options.compression, ['hevc', 'avc', 'jpeg', 'av1'])) {
+      if (is.string(options.compression) && is.inArray(options.compression, ['av1', 'hevc'])) {
         this.options.heifCompression = options.compression;
       } else {
-        throw is.invalidParameterError('compression', 'one of: hevc, avc, jpeg, av1', options.compression);
+        throw is.invalidParameterError('compression', 'one of: av1, hevc', options.compression);
+      }
+    }
+    if (is.defined(options.speed)) {
+      if (is.integer(options.speed) && is.inRange(options.speed, 0, 8)) {
+        this.options.heifSpeed = options.speed;
+      } else {
+        throw is.invalidParameterError('speed', 'integer between 0 and 8', options.speed);
+      }
+    }
+    if (is.defined(options.chromaSubsampling)) {
+      if (is.string(options.chromaSubsampling) && is.inArray(options.chromaSubsampling, ['4:2:0', '4:4:4'])) {
+        this.options.heifChromaSubsampling = options.chromaSubsampling;
+      } else {
+        throw is.invalidParameterError('chromaSubsampling', 'one of: 4:2:0, 4:4:4', options.chromaSubsampling);
       }
     }
   }
@@ -532,7 +688,7 @@ function heif (options) {
  * const data = await sharp('input.png')
  *   .ensureAlpha()
  *   .extractChannel(3)
- *   .colourspace('b-w')
+ *   .toColourspace('b-w')
  *   .raw()
  *   .toBuffer();
  *
@@ -561,14 +717,17 @@ function raw () {
  *   });
  *
  * @param {Object} [options]
- * @param {Number} [options.size=256] tile size in pixels, a value between 1 and 8192.
- * @param {Number} [options.overlap=0] tile overlap in pixels, a value between 0 and 8192.
- * @param {Number} [options.angle=0] tile angle of rotation, must be a multiple of 90.
- * @param {String|Object} [options.background={r: 255, g: 255, b: 255, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to white without transparency.
- * @param {String} [options.depth] how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
- * @param {Number} [options.skipBlanks=-1] threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images
- * @param {String} [options.container='fs'] tile container, with value `fs` (filesystem) or `zip` (compressed file).
- * @param {String} [options.layout='dz'] filesystem layout, possible values are `dz`, `zoomify` or `google`.
+ * @param {number} [options.size=256] tile size in pixels, a value between 1 and 8192.
+ * @param {number} [options.overlap=0] tile overlap in pixels, a value between 0 and 8192.
+ * @param {number} [options.angle=0] tile angle of rotation, must be a multiple of 90.
+ * @param {string|Object} [options.background={r: 255, g: 255, b: 255, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to white without transparency.
+ * @param {string} [options.depth] how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
+ * @param {number} [options.skipBlanks=-1] threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images
+ * @param {string} [options.container='fs'] tile container, with value `fs` (filesystem) or `zip` (compressed file).
+ * @param {string} [options.layout='dz'] filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`.
+ * @param {boolean} [options.centre=false] centre image in tile.
+ * @param {boolean} [options.center=false] alternative spelling of centre.
+ * @param {string} [options.id='https://example.com/iiif'] when `layout` is `iiif`, sets the `@id` attribute of `info.json`
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -603,10 +762,10 @@ function tile (options) {
     }
     // Layout
     if (is.defined(options.layout)) {
-      if (is.string(options.layout) && is.inArray(options.layout, ['dz', 'google', 'zoomify'])) {
+      if (is.string(options.layout) && is.inArray(options.layout, ['dz', 'google', 'iiif', 'zoomify'])) {
         this.options.tileLayout = options.layout;
       } else {
-        throw is.invalidParameterError('layout', 'one of: dz, google, zoomify', options.layout);
+        throw is.invalidParameterError('layout', 'one of: dz, google, iiif, zoomify', options.layout);
       }
     }
     // Angle of rotation,
@@ -637,6 +796,19 @@ function tile (options) {
     } else if (is.defined(options.layout) && options.layout === 'google') {
       this.options.tileSkipBlanks = 5;
     }
+    // Center image in tile
+    const centre = is.bool(options.center) ? options.center : options.centre;
+    if (is.defined(centre)) {
+      this._setBooleanOption('tileCentre', centre);
+    }
+    // @id attribute for IIIF layout
+    if (is.defined(options.id)) {
+      if (is.string(options.id)) {
+        this.options.tileId = options.id;
+      } else {
+        throw is.invalidParameterError('id', 'string', options.id);
+      }
+    }
   }
   // Format
   if (is.inArray(this.options.formatOut, ['jpeg', 'png', 'webp'])) {
@@ -651,9 +823,9 @@ function tile (options) {
  * Update the output format unless options.force is false,
  * in which case revert to input format.
  * @private
- * @param {String} formatOut
+ * @param {string} formatOut
  * @param {Object} [options]
- * @param {Boolean} [options.force=true] - force output format, otherwise attempt to use input format
+ * @param {boolean} [options.force=true] - force output format, otherwise attempt to use input format
  * @returns {Sharp}
  */
 function _updateFormatOut (formatOut, options) {
@@ -664,10 +836,10 @@ function _updateFormatOut (formatOut, options) {
 }
 
 /**
- * Update a Boolean attribute of the this.options Object.
+ * Update a boolean attribute of the this.options Object.
  * @private
- * @param {String} key
- * @param {Boolean} val
+ * @param {string} key
+ * @param {boolean} val
  * @throws {Error} Invalid key
  */
 function _setBooleanOption (key, val) {
@@ -795,7 +967,9 @@ module.exports = function (Sharp) {
     png,
     webp,
     tiff,
+    avif,
     heif,
+    gif,
     raw,
     tile,
     // Private

lib/platform.js

@@ -13,7 +13,8 @@ module.exports = function () {
   const platformId = [`${platform}${libc}`];
 
   if (arch === 'arm') {
-    platformId.push(`armv${env.npm_config_arm_version || process.config.variables.arm_version || '6'}`);
+    const fallback = process.versions.electron ? '7' : '6';
+    platformId.push(`armv${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 {

lib/resize.js

@@ -96,8 +96,8 @@ function isRotationExpected (options) {
  * 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`: Crop to cover both provided dimensions (the default).
- * - `contain`: Embed within both provided dimensions.
+ * - `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.
@@ -190,8 +190,8 @@ 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] - 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 {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.
@@ -302,11 +302,11 @@ function resize (width, height, options) {
  *   })
  *   ...
  *
- * @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|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 {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
@@ -336,7 +336,7 @@ function extend (extend) {
 }
 
 /**
- * Extract a region of the image.
+ * Extract/crop a region of the image.
  *
  * - Use `extract` before `resize` for pre-resize extraction.
  * - Use `extract` after `resize` for post-resize extraction.
@@ -358,10 +358,10 @@ function extend (extend) {
  *   });
  *
  * @param {Object} options - describes the region to extract using integral pixel values
- * @param {Number} options.left - zero-indexed offset from left edge
- * @param {Number} options.top - zero-indexed offset from top edge
- * @param {Number} options.width - width of region to extract
- * @param {Number} options.height - height of region to extract
+ * @param {number} options.left - zero-indexed offset from left edge
+ * @param {number} options.top - zero-indexed offset from top edge
+ * @param {number} options.width - width of region to extract
+ * @param {number} options.height - height of region to extract
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -386,9 +386,10 @@ function extract (options) {
  * 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.
  *
- * The `info` response Object will contain `trimOffsetLeft` and `trimOffsetTop` properties.
+ * 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.
+ * @param {number} [threshold=10] the allowed difference from the top-left pixel, a number greater than zero.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */

lib/utility.js

@@ -1,6 +1,8 @@
 'use strict';
 
 const events = require('events');
+const detectLibc = require('detect-libc');
+
 const is = require('./is');
 const sharp = require('../build/Release/sharp.node');
 
@@ -13,6 +15,26 @@ const sharp = require('../build/Release/sharp.node');
  */
 const format = sharp.format();
 
+/**
+ * An Object containing the available interpolators and their proper values
+ * @readonly
+ * @enum {string}
+ */
+const interpolators = {
+  /** [Nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation). Suitable for image enlargement only. */
+  nearest: 'nearest',
+  /** [Bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation). Faster than bicubic but with less smooth results. */
+  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. */
+  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. */
+  vertexSplitQuadraticBasisSpline: 'vsqbs'
+};
+
 /**
  * An Object containing the version numbers of libvips and its dependencies.
  * @member
@@ -23,7 +45,7 @@ let versions = {
   vips: sharp.libvipsVersion()
 };
 try {
-  versions = require('../vendor/versions.json');
+  versions = require(`../vendor/${versions.vips}/versions.json`);
 } catch (err) {}
 
 /**
@@ -39,10 +61,10 @@ try {
  * sharp.cache( { files: 0 } );
  * sharp.cache(false);
  *
- * @param {Object|Boolean} [options=true] - Object with the following attributes, or Boolean where true uses default cache settings and false removes all caching
- * @param {Number} [options.memory=50] - is the maximum memory in MB to use for this cache
- * @param {Number} [options.files=20] - is the maximum number of files to hold open
- * @param {Number} [options.items=100] - is the maximum number of operations to cache
+ * @param {Object|boolean} [options=true] - Object with the following attributes, or boolean where true uses default cache settings and false removes all caching
+ * @param {number} [options.memory=50] - is the maximum memory in MB to use for this cache
+ * @param {number} [options.files=20] - is the maximum number of files to hold open
+ * @param {number} [options.items=100] - is the maximum number of operations to cache
  * @returns {Object}
  */
 function cache (options) {
@@ -64,8 +86,12 @@ 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 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.
  *
  * The maximum number of images that can be processed in parallel
  * is limited by libuv's `UV_THREADPOOL_SIZE` environment variable.
@@ -77,12 +103,17 @@ cache(true);
  * sharp.concurrency(2); // 2
  * sharp.concurrency(0); // 4
  *
- * @param {Number} [concurrency]
- * @returns {Number} concurrency
+ * @param {number} [concurrency]
+ * @returns {number} concurrency
  */
 function concurrency (concurrency) {
   return sharp.concurrency(is.integer(concurrency) ? concurrency : null);
 }
+/* istanbul ignore next */
+if (detectLibc.family === 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:
@@ -124,8 +155,8 @@ function counters () {
  * const simd = sharp.simd(false);
  * // prevent libvips from using liborc at runtime
  *
- * @param {Boolean} [simd=true]
- * @returns {Boolean}
+ * @param {boolean} [simd=true]
+ * @returns {boolean}
  */
 function simd (simd) {
   return sharp.simd(is.bool(simd) ? simd : null);
@@ -137,15 +168,12 @@ simd(true);
  * @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;
 };

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": "0.25.1",
+  "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images",
+  "version": "0.28.0-alpha1",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://github.com/lovell/sharp",
   "contributors": [
@@ -65,17 +65,26 @@
     "Andargor <andargor@yahoo.com>",
     "Paul Neave <paul.neave@gmail.com>",
     "Brendan Kennedy <brenwken@gmail.com>",
-    "Brychan Bennett-Odlum <git@brychan.io>"
+    "Brychan Bennett-Odlum <git@brychan.io>",
+    "Edward Silverton <e.silverton@gmail.com>",
+    "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>",
+    "Christian Flintrup <chr@gigahost.dk>",
+    "Manan Jadhav <manan@motionden.com>",
+    "Leon Radley <leon@radley.se>",
+    "alza54 <alza54@thiocod.in>"
   ],
   "scripts": {
-    "install": "(node install/libvips && node install/dll-copy && prebuild-install --runtime=napi) || (node-gyp rebuild && node install/dll-copy)",
+    "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 && prebuild-ci",
+    "test": "semistandard && cpplint && npm run test-unit && npm run test-licensing",
     "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",
     "test-leak": "./test/leak/leak.sh",
-    "docs-build": "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",
+    "docs-build": "documentation lint lib && 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"
   },
@@ -94,6 +103,7 @@
     "jpeg",
     "png",
     "webp",
+    "avif",
     "tiff",
     "gif",
     "svg",
@@ -107,35 +117,35 @@
     "vips"
   ],
   "dependencies": {
-    "color": "^3.1.2",
+    "color": "^3.1.3",
     "detect-libc": "^1.0.3",
-    "node-addon-api": "^2.0.0",
-    "npmlog": "^4.1.2",
-    "prebuild-install": "^5.3.3",
-    "semver": "^7.1.3",
+    "node-addon-api": "^3.1.0",
+    "prebuild-install": "^6.0.1",
+    "semver": "^7.3.4",
     "simple-get": "^3.1.0",
-    "tar": "^6.0.1",
+    "tar-fs": "^2.1.1",
     "tunnel-agent": "^0.6.0"
   },
   "devDependencies": {
     "async": "^3.2.0",
-    "cc": "^2.0.1",
-    "decompress-zip": "^0.3.2",
-    "documentation": "^12.1.4",
+    "cc": "^3.0.1",
+    "decompress-zip": "^0.3.3",
+    "documentation": "^13.1.1",
     "exif-reader": "^1.0.3",
-    "icc": "^1.0.0",
+    "icc": "^2.0.0",
     "license-checker": "^25.0.1",
-    "mocha": "^7.1.0",
-    "mock-fs": "^4.11.0",
-    "nyc": "^15.0.0",
-    "prebuild": "^10.0.0",
-    "prebuild-ci": "^3.1.0",
+    "mocha": "^8.3.1",
+    "mock-fs": "^4.13.0",
+    "nyc": "^15.1.0",
+    "prebuild": "^10.0.1",
     "rimraf": "^3.0.2",
-    "semistandard": "^14.2.0"
+    "semistandard": "^16.0.0"
   },
   "license": "Apache-2.0",
   "config": {
-    "libvips": "8.9.1"
+    "libvips": "8.10.6-alpha3",
+    "runtime": "napi",
+    "target": 3
   },
   "engines": {
     "node": ">=10"

src/common.cc

@@ -17,6 +17,7 @@
 #include <string.h>
 #include <vector>
 #include <queue>
+#include <map>
 #include <mutex>  // NOLINT(build/c++11)
 
 #include <napi.h>
@@ -41,6 +42,9 @@ namespace sharp {
   int32_t AttrAsInt32(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Number>().Int32Value();
   }
+  int32_t AttrAsInt32(Napi::Object obj, unsigned int const attr) {
+    return obj.Get(attr).As<Napi::Number>().Int32Value();
+  }
   double AttrAsDouble(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Number>().DoubleValue();
   }
@@ -50,13 +54,21 @@ namespace sharp {
   bool AttrAsBool(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Boolean>().Value();
   }
-  std::vector<double> AttrAsRgba(Napi::Object obj, std::string attr) {
-    Napi::Array background = obj.Get(attr).As<Napi::Array>();
-    std::vector<double> rgba(background.Length());
-    for (unsigned int i = 0; i < background.Length(); i++) {
-      rgba[i] = AttrAsDouble(background, i);
+  std::vector<double> AttrAsVectorOfDouble(Napi::Object obj, std::string attr) {
+    Napi::Array napiArray = obj.Get(attr).As<Napi::Array>();
+    std::vector<double> vectorOfDouble(napiArray.Length());
+    for (unsigned int i = 0; i < napiArray.Length(); i++) {
+      vectorOfDouble[i] = AttrAsDouble(napiArray, i);
     }
-    return rgba;
+    return vectorOfDouble;
+  }
+  std::vector<int32_t> AttrAsInt32Vector(Napi::Object obj, std::string attr) {
+    Napi::Array array = obj.Get(attr).As<Napi::Array>();
+    std::vector<int32_t> vector(array.Length());
+    for (unsigned int i = 0; i < array.Length(); i++) {
+      vector[i] = AttrAsInt32(array, i);
+    }
+    return vector;
   }
 
   // Create an InputDescriptor instance from a Napi::Object describing an input image
@@ -88,12 +100,22 @@ namespace sharp {
     if (HasAttr(input, "page")) {
       descriptor->page = AttrAsUint32(input, "page");
     }
+    // Multi-level input (OpenSlide)
+    if (HasAttr(input, "level")) {
+      descriptor->level = AttrAsUint32(input, "level");
+    }
     // Create new image
     if (HasAttr(input, "createChannels")) {
       descriptor->createChannels = AttrAsUint32(input, "createChannels");
       descriptor->createWidth = AttrAsUint32(input, "createWidth");
       descriptor->createHeight = AttrAsUint32(input, "createHeight");
-      descriptor->createBackground = AttrAsRgba(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");
+      }
     }
     // Limit input images to a given number of pixels, where pixels = width * height
     descriptor->limitInputPixels = AttrAsUint32(input, "limitInputPixels");
@@ -121,6 +143,9 @@ namespace sharp {
   bool IsWebp(std::string const &str) {
     return EndsWith(str, ".webp") || EndsWith(str, ".WEBP");
   }
+  bool IsGif(std::string const &str) {
+    return EndsWith(str, ".gif") || EndsWith(str, ".GIF");
+  }
   bool IsTiff(std::string const &str) {
     return EndsWith(str, ".tif") || EndsWith(str, ".tiff") || EndsWith(str, ".TIF") || EndsWith(str, ".TIFF");
   }
@@ -161,6 +186,7 @@ namespace sharp {
       case ImageType::OPENSLIDE: id = "openslide"; break;
       case ImageType::PPM: id = "ppm"; break;
       case ImageType::FITS: id = "fits"; break;
+      case ImageType::EXR: id = "exr"; break;
       case ImageType::VIPS: id = "vips"; break;
       case ImageType::RAW: id = "raw"; break;
       case ImageType::UNKNOWN: id = "unknown"; break;
@@ -169,32 +195,50 @@ 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 = {
+    { "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 },
+    { "VipsForeignLoadSvgFile", ImageType::SVG },
+    { "VipsForeignLoadSvgBuffer", ImageType::SVG },
+    { "VipsForeignLoadHeifFile", ImageType::HEIF },
+    { "VipsForeignLoadHeifBuffer", ImageType::HEIF },
+    { "VipsForeignLoadPdfFile", ImageType::PDF },
+    { "VipsForeignLoadPdfBuffer", ImageType::PDF },
+    { "VipsForeignLoadMagickFile", ImageType::MAGICK },
+    { "VipsForeignLoadMagickBuffer", ImageType::MAGICK },
+    { "VipsForeignLoadOpenslide", ImageType::OPENSLIDE },
+    { "VipsForeignLoadPpmFile", ImageType::PPM },
+    { "VipsForeignLoadFits", ImageType::FITS },
+    { "VipsForeignLoadOpenexr", ImageType::EXR },
+    { "VipsForeignLoadVips", ImageType::VIPS },
+    { "VipsForeignLoadRaw", ImageType::RAW }
+  };
+
   /*
     Determine image format of a buffer.
   */
   ImageType DetermineImageType(void *buffer, size_t const length) {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load_buffer(buffer, length);
-    if (load != NULL) {
-      std::string const loader = load;
-      if (EndsWith(loader, "JpegBuffer")) {
-        imageType = ImageType::JPEG;
-      } else if (EndsWith(loader, "PngBuffer")) {
-        imageType = ImageType::PNG;
-      } else if (EndsWith(loader, "WebpBuffer")) {
-        imageType = ImageType::WEBP;
-      } else if (EndsWith(loader, "TiffBuffer")) {
-        imageType = ImageType::TIFF;
-      } else if (EndsWith(loader, "GifBuffer")) {
-        imageType = ImageType::GIF;
-      } else if (EndsWith(loader, "SvgBuffer")) {
-        imageType = ImageType::SVG;
-      } else if (EndsWith(loader, "HeifBuffer")) {
-        imageType = ImageType::HEIF;
-      } else if (EndsWith(loader, "PdfBuffer")) {
-        imageType = ImageType::PDF;
-      } else if (EndsWith(loader, "MagickBuffer")) {
-        imageType = ImageType::MAGICK;
+    if (load != nullptr) {
+      auto it = loaderToType.find(load);
+      if (it != loaderToType.end()) {
+        imageType = it->second;
       }
     }
     return imageType;
@@ -207,36 +251,12 @@ namespace sharp {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load(file);
     if (load != nullptr) {
-      std::string const loader = load;
-      if (EndsWith(loader, "JpegFile")) {
-        imageType = ImageType::JPEG;
-      } else if (EndsWith(loader, "PngFile")) {
-        imageType = ImageType::PNG;
-      } else if (EndsWith(loader, "WebpFile")) {
-        imageType = ImageType::WEBP;
-      } else if (EndsWith(loader, "Openslide")) {
-        imageType = ImageType::OPENSLIDE;
-      } else if (EndsWith(loader, "TiffFile")) {
-        imageType = ImageType::TIFF;
-      } else if (EndsWith(loader, "GifFile")) {
-        imageType = ImageType::GIF;
-      } else if (EndsWith(loader, "SvgFile")) {
-        imageType = ImageType::SVG;
-      } else if (EndsWith(loader, "HeifFile")) {
-        imageType = ImageType::HEIF;
-      } else if (EndsWith(loader, "PdfFile")) {
-        imageType = ImageType::PDF;
-      } else if (EndsWith(loader, "Ppm")) {
-        imageType = ImageType::PPM;
-      } else if (EndsWith(loader, "Fits")) {
-        imageType = ImageType::FITS;
-      } else if (EndsWith(loader, "Vips")) {
-        imageType = ImageType::VIPS;
-      } else if (EndsWith(loader, "Magick") || EndsWith(loader, "MagickFile")) {
-        imageType = ImageType::MAGICK;
+      auto it = loaderToType.find(load);
+      if (it != loaderToType.end()) {
+        imageType = it->second;
       }
     } else {
-      if (EndsWith(vips::VError().what(), " not found\n")) {
+      if (EndsWith(vips::VError().what(), " does not exist\n")) {
         imageType = ImageType::MISSING;
       }
     }
@@ -248,6 +268,8 @@ namespace sharp {
   */
   bool ImageTypeSupportsPage(ImageType imageType) {
     return
+      imageType == ImageType::WEBP ||
+      imageType == ImageType::MAGICK ||
       imageType == ImageType::GIF ||
       imageType == ImageType::TIFF ||
       imageType == ImageType::HEIF ||
@@ -279,6 +301,9 @@ namespace sharp {
             vips::VOption *option = VImage::option()
               ->set("access", descriptor->access)
               ->set("fail", descriptor->failOnError);
+            if (imageType == ImageType::SVG) {
+              option->set("unlimited", TRUE);
+            }
             if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
               option->set("dpi", descriptor->density);
             }
@@ -289,6 +314,9 @@ namespace sharp {
               option->set("n", descriptor->pages);
               option->set("page", descriptor->page);
             }
+            if (imageType == ImageType::OPENSLIDE) {
+              option->set("level", descriptor->level);
+            }
             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);
@@ -303,15 +331,35 @@ namespace sharp {
     } else {
       if (descriptor->createChannels > 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") {
+          int const channels = descriptor->createChannels;
+          image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight);
+          std::vector<VImage> bands = {};
+          bands.reserve(channels);
+          for (int _band = 0; _band < channels; _band++) {
+            bands.push_back(image.gaussnoise(
+              descriptor->createWidth,
+              descriptor->createHeight,
+              VImage::option()->set("mean", descriptor->createNoiseMean)->set("sigma", descriptor->createNoiseSigma)));
+          }
+          image = image.bandjoin(bands);
+          image = image.cast(VipsBandFormat::VIPS_FORMAT_UCHAR);
+          if (channels < 3) {
+            image = image.colourspace(VIPS_INTERPRETATION_B_W);
+          } else {
+            image = image.colourspace(VIPS_INTERPRETATION_sRGB);
+          }
+        } else {
+          std::vector<double> background = {
+            descriptor->createBackground[0],
+            descriptor->createBackground[1],
+            descriptor->createBackground[2]
+          };
+          if (descriptor->createChannels == 4) {
+            background.push_back(descriptor->createBackground[3]);
+          }
+          image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight).new_from_image(background);
         }
-        image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight).new_from_image(background);
         image.get_image()->Type = VIPS_INTERPRETATION_sRGB;
         imageType = ImageType::RAW;
       } else {
@@ -325,6 +373,9 @@ namespace sharp {
             vips::VOption *option = VImage::option()
               ->set("access", descriptor->access)
               ->set("fail", descriptor->failOnError);
+            if (imageType == ImageType::SVG) {
+              option->set("unlimited", TRUE);
+            }
             if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
               option->set("dpi", descriptor->density);
             }
@@ -335,6 +386,9 @@ namespace sharp {
               option->set("n", descriptor->pages);
               option->set("page", descriptor->page);
             }
+            if (imageType == ImageType::OPENSLIDE) {
+              option->set("level", descriptor->level);
+            }
             image = VImage::new_from_file(descriptor->file.data(), option);
             if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
               image = SetDensity(image, descriptor->density);
@@ -367,12 +421,7 @@ 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();
   }
 
   /*
@@ -404,6 +453,38 @@ namespace sharp {
     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;
+
+    if (pageHeight == 0 && image.get_typeof(VIPS_META_PAGE_HEIGHT) == G_TYPE_INT) {
+      pageHeight = image.get_int(VIPS_META_PAGE_HEIGHT);
+    }
+
+    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!
+    VImage copy = image.copy();
+
+    copy.set(VIPS_META_PAGE_HEIGHT, pageHeight);
+    if (hasDelay) copy.set("delay", delay);
+    if (loop != -1) copy.set("loop", loop);
+
+    return copy;
+  }
+
   /*
     Does this image have a non-default density?
   */
@@ -434,14 +515,21 @@ namespace sharp {
     Check the proposed format supports the current dimensions.
   */
   void AssertImageTypeDimensions(VImage image, ImageType const imageType) {
+    const int height = image.get_typeof(VIPS_META_PAGE_HEIGHT) == G_TYPE_INT
+      ? image.get_int(VIPS_META_PAGE_HEIGHT)
+      : image.height();
     if (imageType == ImageType::JPEG) {
-      if (image.width() > 65535 || image.height() > 65535) {
+      if (image.width() > 65535 || height > 65535) {
         throw vips::VError("Processed image is too large for the JPEG format");
       }
     } else if (imageType == ImageType::WEBP) {
-      if (image.width() > 16383 || image.height() > 16383) {
+      if (image.width() > 16383 || height > 16383) {
         throw vips::VError("Processed image is too large for the WebP format");
       }
+    } else if (imageType == ImageType::GIF) {
+      if (image.width() > 65535 || height > 65535) {
+        throw vips::VError("Processed image is too large for the GIF format");
+      }
     }
   }
 
@@ -598,26 +686,18 @@ 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);
   }
 
@@ -704,4 +784,25 @@ namespace sharp {
     return std::make_tuple(image, alphaColour);
   }
 
+  /*
+    Removes alpha channel, if any.
+  */
+  VImage RemoveAlpha(VImage image) {
+    if (HasAlpha(image)) {
+      image = image.extract_band(0, VImage::option()->set("n", image.bands() - 1));
+    }
+    return image;
+  }
+
+  /*
+    Ensures alpha channel, if missing.
+  */
+  VImage EnsureAlpha(VImage image) {
+    if (!HasAlpha(image)) {
+      std::vector<double> alpha;
+      alpha.push_back(sharp::MaximumImageAlpha(image.interpretation()));
+      image = image.bandjoin_const(alpha);
+    }
+    return image;
+  }
 }  // namespace sharp

src/common.h

@@ -24,8 +24,10 @@
 
 // Verify platform and compiler compatibility
 
-#if (VIPS_MAJOR_VERSION < 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 9))
-#error "libvips version 8.9.1+ is required - please see https://sharp.pixelplumbing.com/install"
+#if (VIPS_MAJOR_VERSION < 8) || \
+  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 10) || \
+  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION == 10 && VIPS_MICRO_VERSION < 6)
+#error "libvips version 8.10.6+ is required - please see https://sharp.pixelplumbing.com/install"
 #endif
 
 #if ((!defined(__clang__)) && defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)))
@@ -57,10 +59,14 @@ namespace sharp {
     int rawHeight;
     int pages;
     int page;
+    int level;
     int createChannels;
     int createWidth;
     int createHeight;
     std::vector<double> createBackground;
+    std::string createNoiseType;
+    double createNoiseMean;
+    double createNoiseSigma;
 
     InputDescriptor():
       buffer(nullptr),
@@ -75,10 +81,13 @@ namespace sharp {
       rawHeight(0),
       pages(1),
       page(0),
+      level(0),
       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) {}
   };
 
   // Convenience methods to access the attributes of a Napi::Object
@@ -86,10 +95,12 @@ namespace sharp {
   std::string AttrAsStr(Napi::Object obj, std::string 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);
   double AttrAsDouble(Napi::Object obj, std::string attr);
   double AttrAsDouble(Napi::Object obj, unsigned int const attr);
   bool AttrAsBool(Napi::Object obj, std::string attr);
-  std::vector<double> AttrAsRgba(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);
 
   // Create an InputDescriptor instance from a Napi::Object describing an input image
   InputDescriptor* CreateInputDescriptor(Napi::Object input);
@@ -107,6 +118,7 @@ namespace sharp {
     OPENSLIDE,
     PPM,
     FITS,
+    EXR,
     VIPS,
     RAW,
     UNKNOWN,
@@ -123,6 +135,7 @@ namespace sharp {
   bool IsJpeg(std::string const &str);
   bool IsPng(std::string const &str);
   bool IsWebp(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);
@@ -182,6 +195,12 @@ namespace sharp {
   */
   VImage RemoveExifOrientation(VImage image);
 
+  /*
+    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);
+
   /*
     Does this image have a non-default density?
   */
@@ -269,6 +288,16 @@ namespace sharp {
    */
   std::tuple<VImage, std::vector<double>> ApplyAlpha(VImage image, std::vector<double> colour);
 
+  /*
+    Removes alpha channel, if any.
+  */
+  VImage RemoveAlpha(VImage image);
+
+  /*
+    Ensures alpha channel, if missing.
+  */
+  VImage EnsureAlpha(VImage image);
+
 }  // namespace sharp
 
 #endif  // SRC_COMMON_H_

src/libvips/cplusplus/vips-operators.cpp

@@ -1,5 +1,5 @@
 // bodies for vips operations
-// Wed 01 Jan 2020 12:22:12 PM CET
+// Sun  5 Jul 22:36:37 BST 2020
 // this file is generated automatically, do not edit!
 
 VImage VImage::CMC2LCh( VOption *options ) const
@@ -754,6 +754,18 @@ VImage VImage::csvload( const char *filename, VOption *options )
     return( out );
 }
 
+VImage VImage::csvload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "csvload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 void VImage::csvsave( const char *filename, VOption *options ) const
 {
     call( "csvsave",
@@ -762,6 +774,14 @@ void VImage::csvsave( const char *filename, VOption *options ) const
             set( "filename", filename ) );
 }
 
+void VImage::csvsave_target( VTarget target, VOption *options ) const
+{
+    call( "csvsave_target",
+        (options ? options : VImage::option())->
+            set( "in", *this )->
+            set( "target", target ) );
+}
+
 VImage VImage::dE00( VImage right, VOption *options ) const
 {
     VImage out;
@@ -1218,6 +1238,18 @@ VImage VImage::gifload_buffer( VipsBlob *buffer, VOption *options )
     return( out );
 }
 
+VImage VImage::gifload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "gifload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 VImage VImage::globalbalance( VOption *options ) const
 {
     VImage out;
@@ -1297,6 +1329,18 @@ VImage VImage::heifload_buffer( VipsBlob *buffer, VOption *options )
     return( out );
 }
 
+VImage VImage::heifload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "heifload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 void VImage::heifsave( const char *filename, VOption *options ) const
 {
     call( "heifsave",
@@ -1317,6 +1361,14 @@ VipsBlob *VImage::heifsave_buffer( VOption *options ) const
     return( buffer );
 }
 
+void VImage::heifsave_target( VTarget target, VOption *options ) const
+{
+    call( "heifsave_target",
+        (options ? options : VImage::option())->
+            set( "in", *this )->
+            set( "target", target ) );
+}
+
 VImage VImage::hist_cum( VOption *options ) const
 {
     VImage out;
@@ -2028,6 +2080,18 @@ VImage VImage::matload( const char *filename, VOption *options )
     return( out );
 }
 
+VImage VImage::matrixinvert( VOption *options ) const
+{
+    VImage out;
+
+    call( "matrixinvert",
+        (options ? options : VImage::option())->
+            set( "in", *this )->
+            set( "out", &out ) );
+
+    return( out );
+}
+
 VImage VImage::matrixload( const char *filename, VOption *options )
 {
     VImage out;
@@ -2040,6 +2104,18 @@ VImage VImage::matrixload( const char *filename, VOption *options )
     return( out );
 }
 
+VImage VImage::matrixload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "matrixload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 void VImage::matrixprint( VOption *options ) const
 {
     call( "matrixprint",
@@ -2055,6 +2131,14 @@ void VImage::matrixsave( const char *filename, VOption *options ) const
             set( "filename", filename ) );
 }
 
+void VImage::matrixsave_target( VTarget target, VOption *options ) const
+{
+    call( "matrixsave_target",
+        (options ? options : VImage::option())->
+            set( "in", *this )->
+            set( "target", target ) );
+}
+
 double VImage::max( VOption *options ) const
 {
     double out;
@@ -2256,6 +2340,18 @@ VImage VImage::pdfload_buffer( VipsBlob *buffer, VOption *options )
     return( out );
 }
 
+VImage VImage::pdfload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "pdfload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 int VImage::percent( double percent, VOption *options ) const
 {
     int threshold;
@@ -2371,6 +2467,18 @@ VImage VImage::ppmload( const char *filename, VOption *options )
     return( out );
 }
 
+VImage VImage::ppmload_source( VSource source, VOption *options )
+{
+    VImage out;
+
+    call( "ppmload_source",
+        (options ? options : VImage::option())->
+            set( "out", &out )->
+            set( "source", source ) );
+
+    return( out );
+}
+
 void VImage::ppmsave( const char *filename, VOption *options ) const
 {
     call( "ppmsave",
@@ -2379,6 +2487,14 @@ void VImage::ppmsave( const char *filename, VOption *options ) const
             set( "filename", filename ) );
 }
 
+void VImage::ppmsave_target( VTarget target, VOption *options ) const
+{
+    call( "ppmsave_target",
+        (options ? options : VImage::option())->
+            set( "in", *this )->
+            set( "target", target ) );
+}
+
 VImage VImage::premultiply( VOption *options ) const
 {
     VImage out;

src/metadata.cc

@@ -74,6 +74,18 @@ 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("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++) {
+          std::string prefix = "openslide.level[" + std::to_string(l) + "].";
+          int const width = std::stoi(image.get_string((prefix + "width").data()));
+          int const height = std::stoi(image.get_string((prefix + "height").data()));
+          baton->levels.push_back(std::pair<int, int>(width, height));
+        }
+      }
       baton->hasProfile = sharp::HasProfile(image);
       // Derived attributes
       baton->hasAlpha = sharp::HasAlpha(image);
@@ -177,6 +189,20 @@ 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->levels.empty()) {
+        int i = 0;
+        Napi::Array levels = Napi::Array::New(env, static_cast<size_t>(baton->levels.size()));
+        for (std::pair<int, int> const &l : baton->levels) {
+          Napi::Object level = Napi::Object::New(env);
+          level.Set("width", l.first);
+          level.Set("height", l.second);
+          levels.Set(i++, level);
+        }
+        info.Set("levels", levels);
+      }
       info.Set("hasProfile", baton->hasProfile);
       info.Set("hasAlpha", baton->hasAlpha);
       if (baton->orientation > 0) {
@@ -229,6 +255,7 @@ Napi::Value metadata(const Napi::CallbackInfo& info) {
   // Join queue for worker thread
   Napi::Function callback = info[1].As<Napi::Function>();
   MetadataWorker *worker = new MetadataWorker(callback, baton, debuglog);
+  worker->Receiver().Set("options", options);
   worker->Queue();
 
   // Increment queued task counter

src/metadata.h

@@ -39,6 +39,8 @@ struct MetadataBaton {
   int loop;
   std::vector<int> delay;
   int pagePrimary;
+  std::string compression;
+  std::vector<std::pair<int, int>> levels;
   bool hasProfile;
   bool hasAlpha;
   int orientation;

src/operations.cc

@@ -27,29 +27,6 @@ using vips::VImage;
 using vips::VError;
 
 namespace sharp {
-
-  /*
-    Removes alpha channel, if any.
-  */
-  VImage RemoveAlpha(VImage image) {
-    if (HasAlpha(image)) {
-      image = image.extract_band(0, VImage::option()->set("n", image.bands() - 1));
-    }
-    return image;
-  }
-
-  /*
-    Ensures alpha channel, if missing.
-  */
-  VImage EnsureAlpha(VImage image) {
-    if (!HasAlpha(image)) {
-      std::vector<double> alpha;
-      alpha.push_back(sharp::MaximumImageAlpha(image.interpretation()));
-      image = image.bandjoin_const(alpha);
-    }
-    return image;
-  }
-
   /*
    * Tint an image using the specified chroma, preserving the original image luminance
    */
@@ -172,8 +149,8 @@ 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

src/operations.h

@@ -25,16 +25,6 @@ using vips::VImage;
 
 namespace sharp {
 
-  /*
-    Removes alpha channel, if any.
-  */
-  VImage RemoveAlpha(VImage image);
-
-  /*
-    Ensures alpha channel, if missing.
-  */
-  VImage EnsureAlpha(VImage image);
-
   /*
    * Tint an image using the specified chroma, preserving the original image luminance
    */

src/pipeline.cc

@@ -485,6 +485,18 @@ class PipelineWorker : public Napi::AsyncWorker {
           baton->leftOffsetPost, baton->topOffsetPost, baton->widthPost, baton->heightPost);
       }
 
+      // Affine transform
+      if (baton->affineMatrix.size() > 0) {
+        std::vector<double> background;
+        std::tie(image, background) = sharp::ApplyAlpha(image, baton->affineBackground);
+        image = image.affine(baton->affineMatrix, VImage::option()->set("background", background)
+          ->set("idx", baton->affineIdx)
+          ->set("idy", baton->affineIdy)
+          ->set("odx", baton->affineOdx)
+          ->set("ody", baton->affineOdy)
+          ->set("interpolate", baton->affineInterpolator));
+      }
+
       // Extend edges
       if (baton->extendTop > 0 || baton->extendBottom > 0 || baton->extendLeft > 0 || baton->extendRight > 0) {
         std::vector<double> background;
@@ -558,7 +570,7 @@ class PipelineWorker : public Napi::AsyncWorker {
               int left;
               int top;
               compositeImage = compositeImage.replicate(across, down);
-              if (composite->left >= 0 && composite->top >= 0) {
+              if (composite->hasOffset) {
                 std::tie(left, top) = sharp::CalculateCrop(
                   compositeImage.width(), compositeImage.height(), image.width(), image.height(),
                   composite->left, composite->top);
@@ -580,7 +592,7 @@ class PipelineWorker : public Napi::AsyncWorker {
           // Calculate position
           int left;
           int top;
-          if (composite->left >= 0 && composite->top >= 0) {
+          if (composite->hasOffset) {
             // Composite image at given offsets
             std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
               compositeImage.width(), compositeImage.height(), composite->left, composite->top);
@@ -645,8 +657,12 @@ class PipelineWorker : public Napi::AsyncWorker {
       // Extract an image channel (aka vips band)
       if (baton->extractChannel > -1) {
         if (baton->extractChannel >= image.bands()) {
-          (baton->err).append("Cannot extract channel from image. Too few channels in image.");
-          return Error();
+          if (baton->extractChannel == 3 && sharp::HasAlpha(image)) {
+            baton->extractChannel = image.bands() - 1;
+          } else {
+            (baton->err).append("Cannot extract channel from image. Too few channels in image.");
+            return Error();
+          }
         }
         VipsInterpretation const interpretation = sharp::Is16Bit(image.interpretation())
           ? VIPS_INTERPRETATION_GREY16
@@ -680,6 +696,15 @@ class PipelineWorker : public Napi::AsyncWorker {
         }
       }
 
+      // Apply output ICC profile
+      if (!baton->withMetadataIcc.empty()) {
+        image = image.icc_transform(
+          const_cast<char*>(baton->withMetadataIcc.data()),
+          VImage::option()
+            ->set("input_profile", "srgb")
+            ->set("intent", VIPS_INTENT_PERCEPTUAL));
+      }
+
       // Override EXIF Orientation tag
       if (baton->withMetadata && baton->withMetadataOrientation != -1) {
         image = sharp::SetExifOrientation(image, baton->withMetadataOrientation);
@@ -689,17 +714,29 @@ class PipelineWorker : public Napi::AsyncWorker {
       baton->channels = image.bands();
       baton->width = image.width();
       baton->height = image.height();
+
+      bool const supportsGifOutput = vips_type_find("VipsOperation", "magicksave") != 0 &&
+       vips_type_find("VipsOperation", "magicksave_buffer") != 0;
+
+      image = sharp::SetAnimationProperties(
+        image,
+        baton->pageHeight,
+        baton->delay,
+        baton->loop);
+
       // Output
       if (baton->fileOut.empty()) {
         // Buffer output
         if (baton->formatOut == "jpeg" || (baton->formatOut == "input" && inputImageType == sharp::ImageType::JPEG)) {
           // Write JPEG to buffer
           sharp::AssertImageTypeDimensions(image, sharp::ImageType::JPEG);
-          VipsArea *area = VIPS_AREA(image.jpegsave_buffer(VImage::option()
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.jpegsave_buffer(VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->jpegQuality)
             ->set("interlace", baton->jpegProgressive)
-            ->set("no_subsample", baton->jpegChromaSubsampling == "4:4:4")
+            ->set("subsample_mode", baton->jpegChromaSubsampling == "4:4:4"
+              ? VIPS_FOREIGN_JPEG_SUBSAMPLE_OFF
+              : VIPS_FOREIGN_JPEG_SUBSAMPLE_ON)
             ->set("trellis_quant", baton->jpegTrellisQuantisation)
             ->set("quant_table", baton->jpegQuantisationTable)
             ->set("overshoot_deringing", baton->jpegOvershootDeringing)
@@ -716,11 +753,11 @@ class PipelineWorker : public Napi::AsyncWorker {
             baton->channels = std::min(baton->channels, 3);
           }
         } else if (baton->formatOut == "png" || (baton->formatOut == "input" &&
-          (inputImageType == sharp::ImageType::PNG || inputImageType == sharp::ImageType::GIF ||
-            inputImageType == sharp::ImageType::SVG))) {
+          (inputImageType == sharp::ImageType::PNG || (inputImageType == sharp::ImageType::GIF && !supportsGifOutput) ||
+           inputImageType == sharp::ImageType::SVG))) {
           // Write PNG to buffer
           sharp::AssertImageTypeDimensions(image, sharp::ImageType::PNG);
-          VipsArea *area = VIPS_AREA(image.pngsave_buffer(VImage::option()
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.pngsave_buffer(VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("interlace", baton->pngProgressive)
             ->set("compression", baton->pngCompressionLevel)
@@ -738,7 +775,7 @@ class PipelineWorker : public Napi::AsyncWorker {
           (baton->formatOut == "input" && inputImageType == sharp::ImageType::WEBP)) {
           // Write WEBP to buffer
           sharp::AssertImageTypeDimensions(image, sharp::ImageType::WEBP);
-          VipsArea *area = VIPS_AREA(image.webpsave_buffer(VImage::option()
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.webpsave_buffer(VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->webpQuality)
             ->set("lossless", baton->webpLossless)
@@ -751,6 +788,20 @@ class PipelineWorker : public Napi::AsyncWorker {
           area->free_fn = nullptr;
           vips_area_unref(area);
           baton->formatOut = "webp";
+        } else if (baton->formatOut == "gif" ||
+          (baton->formatOut == "input" && inputImageType == sharp::ImageType::GIF && supportsGifOutput)) {
+          // Write GIF to buffer
+          sharp::AssertImageTypeDimensions(image, sharp::ImageType::GIF);
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.magicksave_buffer(VImage::option()
+            ->set("strip", !baton->withMetadata)
+            ->set("optimize_gif_frames", TRUE)
+            ->set("optimize_gif_transparency", TRUE)
+            ->set("format", "gif")));
+          baton->bufferOut = static_cast<char*>(area->data);
+          baton->bufferOutLength = area->length;
+          area->free_fn = nullptr;
+          vips_area_unref(area);
+          baton->formatOut = "gif";
         } else if (baton->formatOut == "tiff" ||
           (baton->formatOut == "input" && inputImageType == sharp::ImageType::TIFF)) {
           // Write TIFF to buffer
@@ -762,10 +813,10 @@ class PipelineWorker : public Napi::AsyncWorker {
           if (baton->tiffPredictor == VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT) {
             image = image.cast(VIPS_FORMAT_FLOAT);
           }
-          VipsArea *area = VIPS_AREA(image.tiffsave_buffer(VImage::option()
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.tiffsave_buffer(VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->tiffQuality)
-            ->set("squash", baton->tiffSquash)
+            ->set("bitdepth", baton->tiffBitdepth)
             ->set("compression", baton->tiffCompression)
             ->set("predictor", baton->tiffPredictor)
             ->set("pyramid", baton->tiffPyramid)
@@ -782,10 +833,15 @@ class PipelineWorker : public Napi::AsyncWorker {
         } else if (baton->formatOut == "heif" ||
           (baton->formatOut == "input" && inputImageType == sharp::ImageType::HEIF)) {
           // Write HEIF to buffer
-          VipsArea *area = VIPS_AREA(image.heifsave_buffer(VImage::option()
+          VipsArea *area = reinterpret_cast<VipsArea*>(image.heifsave_buffer(VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("compression", baton->heifCompression)
             ->set("Q", baton->heifQuality)
+            ->set("speed", baton->heifSpeed)
+#if defined(VIPS_TYPE_FOREIGN_SUBSAMPLE)
+            ->set("subsample_mode", baton->heifChromaSubsampling == "4:4:4"
+              ? VIPS_FOREIGN_SUBSAMPLE_OFF : VIPS_FOREIGN_SUBSAMPLE_ON)
+#endif
             ->set("lossless", baton->heifLossless)));
           baton->bufferOut = static_cast<char*>(area->data);
           baton->bufferOutLength = area->length;
@@ -826,13 +882,16 @@ class PipelineWorker : public Napi::AsyncWorker {
         bool const isJpeg = sharp::IsJpeg(baton->fileOut);
         bool const isPng = sharp::IsPng(baton->fileOut);
         bool const isWebp = sharp::IsWebp(baton->fileOut);
+        bool const isGif = sharp::IsGif(baton->fileOut);
         bool const isTiff = sharp::IsTiff(baton->fileOut);
         bool const isHeif = sharp::IsHeif(baton->fileOut);
         bool const isDz = sharp::IsDz(baton->fileOut);
         bool const isDzZip = sharp::IsDzZip(baton->fileOut);
         bool const isV = sharp::IsV(baton->fileOut);
         bool const mightMatchInput = baton->formatOut == "input";
-        bool const willMatchInput = mightMatchInput && !(isJpeg || isPng || isWebp || isTiff || isDz || isDzZip || isV);
+        bool const willMatchInput = mightMatchInput &&
+         !(isJpeg || isPng || isWebp || isGif || isTiff || isHeif || isDz || isDzZip || isV);
+
         if (baton->formatOut == "jpeg" || (mightMatchInput && isJpeg) ||
           (willMatchInput && inputImageType == sharp::ImageType::JPEG)) {
           // Write JPEG to file
@@ -841,7 +900,9 @@ class PipelineWorker : public Napi::AsyncWorker {
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->jpegQuality)
             ->set("interlace", baton->jpegProgressive)
-            ->set("no_subsample", baton->jpegChromaSubsampling == "4:4:4")
+            ->set("subsample_mode", baton->jpegChromaSubsampling == "4:4:4"
+              ? VIPS_FOREIGN_JPEG_SUBSAMPLE_OFF
+              : VIPS_FOREIGN_JPEG_SUBSAMPLE_ON)
             ->set("trellis_quant", baton->jpegTrellisQuantisation)
             ->set("quant_table", baton->jpegQuantisationTable)
             ->set("overshoot_deringing", baton->jpegOvershootDeringing)
@@ -850,8 +911,8 @@ class PipelineWorker : public Napi::AsyncWorker {
           baton->formatOut = "jpeg";
           baton->channels = std::min(baton->channels, 3);
         } else if (baton->formatOut == "png" || (mightMatchInput && isPng) || (willMatchInput &&
-          (inputImageType == sharp::ImageType::PNG || inputImageType == sharp::ImageType::GIF ||
-            inputImageType == sharp::ImageType::SVG))) {
+          (inputImageType == sharp::ImageType::PNG || (inputImageType == sharp::ImageType::GIF && !supportsGifOutput) ||
+           inputImageType == sharp::ImageType::SVG))) {
           // Write PNG to file
           sharp::AssertImageTypeDimensions(image, sharp::ImageType::PNG);
           image.pngsave(const_cast<char*>(baton->fileOut.data()), VImage::option()
@@ -877,6 +938,16 @@ class PipelineWorker : public Napi::AsyncWorker {
             ->set("reduction_effort", baton->webpReductionEffort)
             ->set("alpha_q", baton->webpAlphaQuality));
           baton->formatOut = "webp";
+        } else if (baton->formatOut == "gif" || (mightMatchInput && isGif) ||
+          (willMatchInput && inputImageType == sharp::ImageType::GIF && supportsGifOutput)) {
+          // Write GIF to file
+          sharp::AssertImageTypeDimensions(image, sharp::ImageType::GIF);
+          image.magicksave(const_cast<char*>(baton->fileOut.data()), VImage::option()
+            ->set("strip", !baton->withMetadata)
+            ->set("optimize_gif_frames", TRUE)
+            ->set("optimize_gif_transparency", TRUE)
+            ->set("format", "gif"));
+          baton->formatOut = "gif";
         } else if (baton->formatOut == "tiff" || (mightMatchInput && isTiff) ||
           (willMatchInput && inputImageType == sharp::ImageType::TIFF)) {
           // Write TIFF to file
@@ -884,10 +955,14 @@ class PipelineWorker : public Napi::AsyncWorker {
             sharp::AssertImageTypeDimensions(image, sharp::ImageType::JPEG);
             baton->channels = std::min(baton->channels, 3);
           }
+          // Cast pixel values to float, if required
+          if (baton->tiffPredictor == VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT) {
+            image = image.cast(VIPS_FORMAT_FLOAT);
+          }
           image.tiffsave(const_cast<char*>(baton->fileOut.data()), VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->tiffQuality)
-            ->set("squash", baton->tiffSquash)
+            ->set("bitdepth", baton->tiffBitdepth)
             ->set("compression", baton->tiffCompression)
             ->set("predictor", baton->tiffPredictor)
             ->set("pyramid", baton->tiffPyramid)
@@ -900,13 +975,15 @@ class PipelineWorker : public Napi::AsyncWorker {
         } else if (baton->formatOut == "heif" || (mightMatchInput && isHeif) ||
           (willMatchInput && inputImageType == sharp::ImageType::HEIF)) {
           // Write HEIF to file
-          if (sharp::IsAvif(baton->fileOut)) {
-            baton->heifCompression = VIPS_FOREIGN_HEIF_COMPRESSION_AV1;
-          }
           image.heifsave(const_cast<char*>(baton->fileOut.data()), VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->heifQuality)
             ->set("compression", baton->heifCompression)
+            ->set("speed", baton->heifSpeed)
+#if defined(VIPS_TYPE_FOREIGN_SUBSAMPLE)
+            ->set("subsample_mode", baton->heifChromaSubsampling == "4:4:4"
+              ? VIPS_FOREIGN_SUBSAMPLE_OFF : VIPS_FOREIGN_SUBSAMPLE_ON)
+#endif
             ->set("lossless", baton->heifLossless));
           baton->formatOut = "heif";
         } else if (baton->formatOut == "dz" || isDz || isDzZip) {
@@ -933,19 +1010,17 @@ class PipelineWorker : public Napi::AsyncWorker {
             };
             suffix = AssembleSuffixString(".webp", options);
           } else {
-            std::string extname = baton->tileLayout == VIPS_FOREIGN_DZ_LAYOUT_GOOGLE
-              || baton->tileLayout == VIPS_FOREIGN_DZ_LAYOUT_ZOOMIFY
-                ? ".jpg" : ".jpeg";
             std::vector<std::pair<std::string, std::string>> options {
               {"Q", std::to_string(baton->jpegQuality)},
               {"interlace", baton->jpegProgressive ? "TRUE" : "FALSE"},
-              {"no_subsample", baton->jpegChromaSubsampling == "4:4:4" ? "TRUE": "FALSE"},
+              {"subsample_mode", baton->jpegChromaSubsampling == "4:4:4" ? "off" : "on"},
               {"trellis_quant", baton->jpegTrellisQuantisation ? "TRUE" : "FALSE"},
               {"quant_table", std::to_string(baton->jpegQuantisationTable)},
               {"overshoot_deringing", baton->jpegOvershootDeringing ? "TRUE": "FALSE"},
               {"optimize_scans", baton->jpegOptimiseScans ? "TRUE": "FALSE"},
               {"optimize_coding", baton->jpegOptimiseCoding ? "TRUE": "FALSE"}
             };
+            std::string extname = baton->tileLayout == VIPS_FOREIGN_DZ_LAYOUT_DZ ? ".jpeg" : ".jpg";
             suffix = AssembleSuffixString(extname, options);
           }
           // Remove alpha channel from tile background if image does not contain an alpha channel
@@ -962,6 +1037,8 @@ class PipelineWorker : public Napi::AsyncWorker {
             ->set("suffix", const_cast<char*>(suffix.data()))
             ->set("angle", CalculateAngleRotation(baton->tileAngle))
             ->set("background", baton->tileBackground)
+            ->set("centre", baton->tileCentre)
+            ->set("id", const_cast<char*>(baton->tileId.data()))
             ->set("skip_blanks", baton->tileSkipBlanks);
           // libvips chooses a default depth based on layout. Instead of replicating that logic here by
           // not passing anything - libvips will handle choice
@@ -1189,6 +1266,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
     composite->gravity = sharp::AttrAsUint32(compositeObject, "gravity");
     composite->left = sharp::AttrAsInt32(compositeObject, "left");
     composite->top = sharp::AttrAsInt32(compositeObject, "top");
+    composite->hasOffset = sharp::AttrAsBool(compositeObject, "hasOffset");
     composite->tile = sharp::AttrAsBool(compositeObject, "tile");
     composite->premultiplied = sharp::AttrAsBool(compositeObject, "premultiplied");
     baton->composite.push_back(composite);
@@ -1196,7 +1274,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   // Resize options
   baton->withoutEnlargement = sharp::AttrAsBool(options, "withoutEnlargement");
   baton->position = sharp::AttrAsInt32(options, "position");
-  baton->resizeBackground = sharp::AttrAsRgba(options, "resizeBackground");
+  baton->resizeBackground = sharp::AttrAsVectorOfDouble(options, "resizeBackground");
   baton->kernel = sharp::AttrAsStr(options, "kernel");
   baton->fastShrinkOnLoad = sharp::AttrAsBool(options, "fastShrinkOnLoad");
   // Join Channel Options
@@ -1209,7 +1287,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   }
   // Operators
   baton->flatten = sharp::AttrAsBool(options, "flatten");
-  baton->flattenBackground = sharp::AttrAsRgba(options, "flattenBackground");
+  baton->flattenBackground = sharp::AttrAsVectorOfDouble(options, "flattenBackground");
   baton->negate = sharp::AttrAsBool(options, "negate");
   baton->blurSigma = sharp::AttrAsDouble(options, "blurSigma");
   baton->brightness = sharp::AttrAsDouble(options, "brightness");
@@ -1231,7 +1309,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->useExifOrientation = sharp::AttrAsBool(options, "useExifOrientation");
   baton->angle = sharp::AttrAsInt32(options, "angle");
   baton->rotationAngle = sharp::AttrAsDouble(options, "rotationAngle");
-  baton->rotationBackground = sharp::AttrAsRgba(options, "rotationBackground");
+  baton->rotationBackground = sharp::AttrAsVectorOfDouble(options, "rotationBackground");
   baton->rotateBeforePreExtract = sharp::AttrAsBool(options, "rotateBeforePreExtract");
   baton->flip = sharp::AttrAsBool(options, "flip");
   baton->flop = sharp::AttrAsBool(options, "flop");
@@ -1239,8 +1317,15 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->extendBottom = sharp::AttrAsInt32(options, "extendBottom");
   baton->extendLeft = sharp::AttrAsInt32(options, "extendLeft");
   baton->extendRight = sharp::AttrAsInt32(options, "extendRight");
-  baton->extendBackground = sharp::AttrAsRgba(options, "extendBackground");
+  baton->extendBackground = sharp::AttrAsVectorOfDouble(options, "extendBackground");
   baton->extractChannel = sharp::AttrAsInt32(options, "extractChannel");
+  baton->affineMatrix = sharp::AttrAsVectorOfDouble(options, "affineMatrix");
+  baton->affineBackground = sharp::AttrAsVectorOfDouble(options, "affineBackground");
+  baton->affineIdx = sharp::AttrAsDouble(options, "affineIdx");
+  baton->affineIdy = sharp::AttrAsDouble(options, "affineIdy");
+  baton->affineOdx = sharp::AttrAsDouble(options, "affineOdx");
+  baton->affineOdy = sharp::AttrAsDouble(options, "affineOdy");
+  baton->affineInterpolator = vips::VInterpolate::new_from_name(sharp::AttrAsStr(options, "affineInterpolator").data());
 
   baton->removeAlpha = sharp::AttrAsBool(options, "removeAlpha");
   baton->ensureAlpha = sharp::AttrAsBool(options, "ensureAlpha");
@@ -1280,6 +1365,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->fileOut = sharp::AttrAsStr(options, "fileOut");
   baton->withMetadata = sharp::AttrAsBool(options, "withMetadata");
   baton->withMetadataOrientation = sharp::AttrAsUint32(options, "withMetadataOrientation");
+  baton->withMetadataIcc = sharp::AttrAsStr(options, "withMetadataIcc");
   // Format-specific
   baton->jpegQuality = sharp::AttrAsUint32(options, "jpegQuality");
   baton->jpegProgressive = sharp::AttrAsBool(options, "jpegProgressive");
@@ -1304,7 +1390,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->webpReductionEffort = sharp::AttrAsUint32(options, "webpReductionEffort");
   baton->tiffQuality = sharp::AttrAsUint32(options, "tiffQuality");
   baton->tiffPyramid = sharp::AttrAsBool(options, "tiffPyramid");
-  baton->tiffSquash = sharp::AttrAsBool(options, "tiffSquash");
+  baton->tiffBitdepth = sharp::AttrAsUint32(options, "tiffBitdepth");
   baton->tiffTile = sharp::AttrAsBool(options, "tiffTile");
   baton->tiffTileWidth = sharp::AttrAsUint32(options, "tiffTileWidth");
   baton->tiffTileHeight = sharp::AttrAsUint32(options, "tiffTileHeight");
@@ -1322,11 +1408,25 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->heifCompression = static_cast<VipsForeignHeifCompression>(
     vips_enum_from_nick(nullptr, VIPS_TYPE_FOREIGN_HEIF_COMPRESSION,
     sharp::AttrAsStr(options, "heifCompression").data()));
+  baton->heifSpeed = sharp::AttrAsUint32(options, "heifSpeed");
+  baton->heifChromaSubsampling = sharp::AttrAsStr(options, "heifChromaSubsampling");
+
+  // Animated output
+  if (sharp::HasAttr(options, "pageHeight")) {
+    baton->pageHeight = sharp::AttrAsUint32(options, "pageHeight");
+  }
+  if (sharp::HasAttr(options, "loop")) {
+    baton->loop = sharp::AttrAsUint32(options, "loop");
+  }
+  if (sharp::HasAttr(options, "delay")) {
+    baton->delay = sharp::AttrAsInt32Vector(options, "delay");
+  }
+
   // Tile output
   baton->tileSize = sharp::AttrAsUint32(options, "tileSize");
   baton->tileOverlap = sharp::AttrAsUint32(options, "tileOverlap");
   baton->tileAngle = sharp::AttrAsInt32(options, "tileAngle");
-  baton->tileBackground = sharp::AttrAsRgba(options, "tileBackground");
+  baton->tileBackground = sharp::AttrAsVectorOfDouble(options, "tileBackground");
   baton->tileSkipBlanks = sharp::AttrAsInt32(options, "tileSkipBlanks");
   baton->tileContainer = static_cast<VipsForeignDzContainer>(
     vips_enum_from_nick(nullptr, VIPS_TYPE_FOREIGN_DZ_CONTAINER,
@@ -1338,6 +1438,8 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->tileDepth = static_cast<VipsForeignDzDepth>(
     vips_enum_from_nick(nullptr, VIPS_TYPE_FOREIGN_DZ_DEPTH,
     sharp::AttrAsStr(options, "tileDepth").data()));
+  baton->tileCentre = sharp::AttrAsBool(options, "tileCentre");
+  baton->tileId = sharp::AttrAsStr(options, "tileId");
 
   // Force random access for certain operations
   if (baton->input->access == VIPS_ACCESS_SEQUENTIAL) {
@@ -1362,6 +1464,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   // Join queue for worker thread
   Napi::Function callback = info[1].As<Napi::Function>();
   PipelineWorker *worker = new PipelineWorker(callback, baton, debuglog, queueListener);
+  worker->Receiver().Set("options", options);
   worker->Queue();
 
   // Increment queued task counter

src/pipeline.h

@@ -40,6 +40,7 @@ struct Composite {
   int gravity;
   int left;
   int top;
+  bool hasOffset;
   bool tile;
   bool premultiplied;
 
@@ -47,8 +48,9 @@ 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) {}
 };
@@ -79,6 +81,7 @@ struct PipelineBaton {
   int cropOffsetLeft;
   int cropOffsetTop;
   bool premultiplied;
+  bool tileCentre;
   std::string kernel;
   bool fastShrinkOnLoad;
   double tintA;
@@ -118,6 +121,13 @@ struct PipelineBaton {
   int extendRight;
   std::vector<double> extendBackground;
   bool withoutEnlargement;
+  std::vector<double> affineMatrix;
+  std::vector<double> affineBackground;
+  double affineIdx;
+  double affineIdy;
+  double affineOdx;
+  double affineOdy;
+  vips::VInterpolate affineInterpolator;
   int jpegQuality;
   bool jpegProgressive;
   std::string jpegChromaSubsampling;
@@ -143,7 +153,7 @@ struct PipelineBaton {
   VipsForeignTiffCompression tiffCompression;
   VipsForeignTiffPredictor tiffPredictor;
   bool tiffPyramid;
-  bool tiffSquash;
+  int tiffBitdepth;
   bool tiffTile;
   int tiffTileHeight;
   int tiffTileWidth;
@@ -151,10 +161,13 @@ struct PipelineBaton {
   double tiffYres;
   int heifQuality;
   VipsForeignHeifCompression heifCompression;
+  int heifSpeed;
+  std::string heifChromaSubsampling;
   bool heifLossless;
   std::string err;
   bool withMetadata;
   int withMetadataOrientation;
+  std::string withMetadataIcc;
   std::unique_ptr<double[]> convKernel;
   int convKernelWidth;
   int convKernelHeight;
@@ -167,6 +180,9 @@ struct PipelineBaton {
   bool removeAlpha;
   bool ensureAlpha;
   VipsInterpretation colourspace;
+  int pageHeight;
+  std::vector<int> delay;
+  int loop;
   int tileSize;
   int tileOverlap;
   VipsForeignDzContainer tileContainer;
@@ -176,6 +192,7 @@ struct PipelineBaton {
   std::vector<double> tileBackground;
   int tileSkipBlanks;
   VipsForeignDzDepth tileDepth;
+  std::string tileId;
   std::unique_ptr<double[]> recombMatrix;
 
   PipelineBaton():
@@ -226,6 +243,13 @@ struct PipelineBaton {
     extendRight(0),
     extendBackground{ 0.0, 0.0, 0.0, 255.0 },
     withoutEnlargement(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")),
     jpegQuality(80),
     jpegProgressive(false),
     jpegChromaSubsampling("4:2:0"),
@@ -235,7 +259,7 @@ struct PipelineBaton {
     jpegOptimiseScans(false),
     jpegOptimiseCoding(true),
     pngProgressive(false),
-    pngCompressionLevel(9),
+    pngCompressionLevel(6),
     pngAdaptiveFiltering(false),
     pngPalette(false),
     pngQuality(100),
@@ -251,14 +275,16 @@ struct PipelineBaton {
     tiffCompression(VIPS_FOREIGN_TIFF_COMPRESSION_JPEG),
     tiffPredictor(VIPS_FOREIGN_TIFF_PREDICTOR_HORIZONTAL),
     tiffPyramid(false),
-    tiffSquash(false),
+    tiffBitdepth(8),
     tiffTile(false),
     tiffTileHeight(256),
     tiffTileWidth(256),
     tiffXres(1.0),
     tiffYres(1.0),
-    heifQuality(80),
-    heifCompression(VIPS_FOREIGN_HEIF_COMPRESSION_HEVC),
+    heifQuality(50),
+    heifCompression(VIPS_FOREIGN_HEIF_COMPRESSION_AV1),
+    heifSpeed(5),
+    heifChromaSubsampling("4:2:0"),
     heifLossless(false),
     withMetadata(false),
     withMetadataOrientation(-1),
@@ -273,6 +299,9 @@ struct PipelineBaton {
     removeAlpha(false),
     ensureAlpha(false),
     colourspace(VIPS_INTERPRETATION_LAST),
+    pageHeight(0),
+    delay{-1},
+    loop(-1),
     tileSize(256),
     tileOverlap(0),
     tileContainer(VIPS_FOREIGN_DZ_CONTAINER_FS),

src/sharp.cc

@@ -21,8 +21,15 @@
 #include "utilities.h"
 #include "stats.h"
 
-Napi::Object init(Napi::Env env, Napi::Object exports) {
+static void* sharp_vips_init(void*) {
+  g_setenv("VIPS_MIN_STACK_SIZE", "2m", FALSE);
   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);
 
   g_log_set_handler("VIPS", static_cast<GLogLevelFlags>(G_LOG_LEVEL_WARNING),
     static_cast<GLogFunc>(sharp::VipsWarningCallback), nullptr);
@@ -37,6 +44,7 @@ Napi::Object init(Napi::Env env, Napi::Object exports) {
   exports.Set("libvipsVersion", Napi::Function::New(env, libvipsVersion));
   exports.Set("format", Napi::Function::New(env, format));
   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

@@ -75,8 +75,31 @@ class StatsWorker : public Napi::AsyncWorker {
             baton->isOpaque = false;
           }
         }
+        // Convert to greyscale
+        vips::VImage greyscale = image.colourspace(VIPS_INTERPRETATION_B_W)[0];
         // Estimate entropy via histogram of greyscale value frequency
-        baton->entropy = std::abs(image.colourspace(VIPS_INTERPRETATION_B_W)[0].hist_find().hist_entropy());
+        baton->entropy = std::abs(greyscale.hist_find().hist_entropy());
+        // Estimate sharpness via standard deviation of greyscale laplacian
+        if (image.width() > 1 || image.height() > 1) {
+          VImage laplacian = VImage::new_matrixv(3, 3,
+            0.0,  1.0, 0.0,
+            1.0, -4.0, 1.0,
+            0.0,  1.0, 0.0);
+          laplacian.set("scale", 9.0);
+          baton->sharpness = greyscale.conv(laplacian).deviate();
+        }
+        // Most dominant sRGB colour via 4096-bin 3D histogram
+        vips::VImage hist = sharp::RemoveAlpha(image)
+          .colourspace(VIPS_INTERPRETATION_sRGB)
+          .hist_find_ndim(VImage::option()->set("bins", 16));
+        std::complex<double> maxpos = hist.maxpos();
+        int const dx = static_cast<int>(std::real(maxpos));
+        int const dy = static_cast<int>(std::imag(maxpos));
+        std::vector<double> pel = hist(dx, dy);
+        int const dz = std::distance(pel.begin(), std::find(pel.begin(), pel.end(), hist.max()));
+        baton->dominantRed = dx * 16 + 8;
+        baton->dominantGreen = dy * 16 + 8;
+        baton->dominantBlue = dz * 16 + 8;
       } catch (vips::VError const &err) {
         (baton->err).append(err.what());
       }
@@ -123,6 +146,12 @@ class StatsWorker : public Napi::AsyncWorker {
       info.Set("channels", channels);
       info.Set("isOpaque", baton->isOpaque);
       info.Set("entropy", baton->entropy);
+      info.Set("sharpness", baton->sharpness);
+      Napi::Object dominant = Napi::Object::New(env);
+      dominant.Set("r", baton->dominantRed);
+      dominant.Set("g", baton->dominantGreen);
+      dominant.Set("b", baton->dominantBlue);
+      info.Set("dominant", dominant);
       Callback().MakeCallback(Receiver().Value(), { env.Null(), info });
     } else {
       Callback().MakeCallback(Receiver().Value(), { Napi::Error::New(env, baton->err).Value() });
@@ -154,6 +183,7 @@ Napi::Value stats(const Napi::CallbackInfo& info) {
   // Join queue for worker thread
   Napi::Function callback = info[1].As<Napi::Function>();
   StatsWorker *worker = new StatsWorker(callback, baton, debuglog);
+  worker->Receiver().Set("options", options);
   worker->Queue();
 
   // Increment queued task counter

src/stats.h

@@ -47,13 +47,21 @@ struct StatsBaton {
   std::vector<ChannelStats> channelStats;
   bool isOpaque;
   double entropy;
+  double sharpness;
+  int dominantRed;
+  int dominantGreen;
+  int dominantBlue;
 
   std::string err;
 
   StatsBaton():
     input(nullptr),
     isOpaque(true),
-    entropy(0.0)
+    entropy(0.0),
+    sharpness(0.0),
+    dominantRed(0),
+    dominantGreen(0),
+    dominantBlue(0)
     {}
 };
 

src/utilities.cc

@@ -225,3 +225,19 @@ 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

@@ -24,5 +24,6 @@ Napi::Value simd(const Napi::CallbackInfo& info);
 Napi::Value libvipsVersion(const Napi::CallbackInfo& info);
 Napi::Value format(const Napi::CallbackInfo& info);
 Napi::Value _maxColourDistance(const Napi::CallbackInfo& info);
+Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info);
 
 #endif  // SRC_UTILITIES_H_

test/bench/package.json

@@ -8,16 +8,16 @@
     "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": "^0.9.3",
-    "mapnik": "^4.3.1",
-    "semver": "^7.1.1"
+    "async": "3.2.0",
+    "benchmark": "2.1.4",
+    "gm": "1.23.1",
+    "imagemagick": "0.1.3",
+    "jimp": "0.16.1",
+    "mapnik": "4.5.5",
+    "semver": "7.3.4"
   },
   "license": "Apache-2.0",
   "engines": {
-    "node": ">=8.5.0"
+    "node": "14"
   }
 }

test/bench/perf.js

@@ -15,6 +15,10 @@ const jimp = require('jimp');
 
 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;
 
@@ -56,7 +60,7 @@ 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 {
@@ -77,7 +81,7 @@ 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();
             });
@@ -105,7 +109,7 @@ async.series({
       fn: function (deferred) {
         imagemagick.resize({
           srcPath: fixtures.inputJpg,
-          dstPath: fixtures.outputJpg,
+          dstPath: outputJpg,
           quality: 0.8,
           width: width,
           height: height,
@@ -128,7 +132,7 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .write(fixtures.outputJpg, function (err) {
+          .write(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -159,7 +163,7 @@ async.series({
           .filter('Lanczos')
           .resize(width, height)
           .quality(80)
-          .write(fixtures.outputJpg, function (err) {
+          .write(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -190,7 +194,7 @@ async.series({
       fn: function (deferred) {
         sharp(inputJpgBuffer)
           .resize(width, height)
-          .toFile(fixtures.outputJpg, function (err) {
+          .toFile(outputJpg, function (err) {
             if (err) {
               throw err;
             } else {
@@ -217,7 +221,7 @@ 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 +233,7 @@ 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();
         });
@@ -564,8 +568,9 @@ async.series({
   },
   // PNG
   png: function (callback) {
-    const inputPngBuffer = fs.readFileSync(fixtures.inputPng);
+    const inputPngBuffer = fs.readFileSync(fixtures.inputPngAlphaPremultiplicationLarge);
     const pngSuite = new Benchmark.Suite('png');
+    const minSamples = 64;
     // jimp
     pngSuite.add('jimp-buffer-buffer', {
       defer: true,
@@ -576,6 +581,8 @@ async.series({
           } else {
             image
               .resize(width, height)
+              .deflateLevel(6)
+              .filterType(0)
               .getBuffer(jimp.MIME_PNG, function (err) {
                 if (err) {
                   throw err;
@@ -589,13 +596,15 @@ async.series({
     }).add('jimp-file-file', {
       defer: true,
       fn: function (deferred) {
-        jimp.read(fixtures.inputPng, function (err, image) {
+        jimp.read(fixtures.inputPngAlphaPremultiplicationLarge, function (err, image) {
           if (err) {
             throw err;
           } else {
             image
               .resize(width, height)
-              .write(fixtures.outputPng, function (err) {
+              .deflateLevel(6)
+              .filterType(0)
+              .write(outputPng, function (err) {
                 if (err) {
                   throw err;
                 } else {
@@ -610,7 +619,7 @@ async.series({
     pngSuite.add('mapnik-file-file', {
       defer: true,
       fn: function (deferred) {
-        mapnik.Image.open(fixtures.inputPng, function (err, img) {
+        mapnik.Image.open(fixtures.inputPngAlphaPremultiplicationLarge, function (err, img) {
           if (err) throw err;
           img.premultiply(function (err, img) {
             if (err) throw err;
@@ -620,7 +629,7 @@ async.series({
               if (err) throw err;
               img.demultiply(function (err, img) {
                 if (err) throw err;
-                img.save(fixtures.outputPng, 'png', function (err) {
+                img.save(outputPng, 'png', function (err) {
                   if (err) throw err;
                   deferred.resolve();
                 });
@@ -657,11 +666,15 @@ async.series({
       defer: true,
       fn: function (deferred) {
         imagemagick.resize({
-          srcPath: fixtures.inputPng,
-          dstPath: fixtures.outputPng,
+          srcPath: fixtures.inputPngAlphaPremultiplicationLarge,
+          dstPath: outputPng,
           width: width,
           height: height,
-          filter: 'Lanczos'
+          filter: 'Lanczos',
+          customArgs: [
+            '-define', 'PNG:compression-level=6',
+            '-define', 'PNG:compression-filter=0'
+          ]
         }, function (err) {
           if (err) {
             throw err;
@@ -675,10 +688,12 @@ async.series({
     pngSuite.add('gm-file-file', {
       defer: true,
       fn: function (deferred) {
-        gm(fixtures.inputPng)
+        gm(fixtures.inputPngAlphaPremultiplicationLarge)
           .filter('Lanczos')
           .resize(width, height)
-          .write(fixtures.outputPng, function (err) {
+          .define('PNG:compression-level=6')
+          .define('PNG:compression-filter=0')
+          .write(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -689,9 +704,11 @@ async.series({
     }).add('gm-file-buffer', {
       defer: true,
       fn: function (deferred) {
-        gm(fixtures.inputPng)
+        gm(fixtures.inputPngAlphaPremultiplicationLarge)
           .filter('Lanczos')
           .resize(width, height)
+          .define('PNG:compression-level=6')
+          .define('PNG:compression-filter=0')
           .toBuffer(function (err, buffer) {
             if (err) {
               throw err;
@@ -705,10 +722,12 @@ async.series({
     // sharp
     pngSuite.add('sharp-buffer-file', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
           .resize(width, height)
-          .toFile(fixtures.outputPng, function (err) {
+          .png({ compressionLevel: 6 })
+          .toFile(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -718,9 +737,11 @@ async.series({
       }
     }).add('sharp-buffer-buffer', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
           .resize(width, height)
+          .png({ compressionLevel: 6 })
           .toBuffer(function (err, buffer) {
             if (err) {
               throw err;
@@ -732,10 +753,12 @@ async.series({
       }
     }).add('sharp-file-file', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
-        sharp(fixtures.inputPng)
+        sharp(fixtures.inputPngAlphaPremultiplicationLarge)
           .resize(width, height)
-          .toFile(fixtures.outputPng, function (err) {
+          .png({ compressionLevel: 6 })
+          .toFile(outputPng, function (err) {
             if (err) {
               throw err;
             } else {
@@ -745,9 +768,11 @@ async.series({
       }
     }).add('sharp-file-buffer', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
-        sharp(fixtures.inputPng)
+        sharp(fixtures.inputPngAlphaPremultiplicationLarge)
           .resize(width, height)
+          .png({ compressionLevel: 6 })
           .toBuffer(function (err, buffer) {
             if (err) {
               throw err;
@@ -759,10 +784,11 @@ async.series({
       }
     }).add('sharp-progressive', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
           .resize(width, height)
-          .png({ progressive: true })
+          .png({ compressionLevel: 6, progressive: true })
           .toBuffer(function (err, buffer) {
             if (err) {
               throw err;
@@ -774,10 +800,27 @@ async.series({
       }
     }).add('sharp-adaptiveFiltering', {
       defer: true,
+      minSamples,
       fn: function (deferred) {
         sharp(inputPngBuffer)
           .resize(width, height)
-          .png({ adaptiveFiltering: true })
+          .png({ adaptiveFiltering: true, compressionLevel: 6 })
+          .toBuffer(function (err, buffer) {
+            if (err) {
+              throw err;
+            } else {
+              assert.notStrictEqual(null, buffer);
+              deferred.resolve();
+            }
+          });
+      }
+    }).add('sharp-compressionLevel=9', {
+      defer: true,
+      minSamples,
+      fn: function (deferred) {
+        sharp(inputPngBuffer)
+          .resize(width, height)
+          .png({ compressionLevel: 9 })
           .toBuffer(function (err, buffer) {
             if (err) {
               throw err;
@@ -802,7 +845,7 @@ async.series({
       fn: function (deferred) {
         sharp(inputWebPBuffer)
           .resize(width, height)
-          .toFile(fixtures.outputWebP, function (err) {
+          .toFile(outputWebP, function (err) {
             if (err) {
               throw err;
             } else {
@@ -829,7 +872,7 @@ 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 {

test/bench/random.js

@@ -23,7 +23,7 @@ new Benchmark.Suite('random').add('imagemagick', {
   fn: function (deferred) {
     imagemagick.resize({
       srcPath: fixtures.inputJpg,
-      dstPath: fixtures.outputJpg,
+      dstPath: fixtures.path('output.jpg'),
       quality: 0.8,
       width: randomDimension(),
       height: randomDimension(),

test/fixtures/circle.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 8 8">
+      <circle r="3.75" cx="4" cy="4" fill="deeppink" />
+</svg>

test/fixtures/index.js

@@ -93,6 +93,9 @@ module.exports = {
 
   inputWebP: getPath('4.webp'), // http://www.gstatic.com/webp/gallery/4.webp
   inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
+  inputWebPAnimated: getPath('rotating-squares.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
+  inputWebPAnimatedLoop3: getPath('animated-loop-3.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
+  inputWebPAnimatedBigHeight: getPath('big-height.webp'),
   inputTiff: getPath('G31D.TIF'), // http://www.fileformat.info/format/tiff/sample/e6c9a6e5253348f4aef6d17b534360ab/index.htm
   inputTiffMultipage: getPath('G31D_MULTI.TIF'), // gm convert G31D.TIF -resize 50% G31D_2.TIF ; tiffcp G31D.TIF G31D_2.TIF G31D_MULTI.TIF
   inputTiffCielab: getPath('cielab-dagams.tiff'), // https://github.com/lovell/sharp/issues/646
@@ -104,7 +107,9 @@ module.exports = {
   inputGifAnimated: getPath('rotating-squares.gif'), // CC0 https://loading.io/spinner/blocks/-rotating-squares-preloader-gif
   inputGifAnimatedLoop3: getPath('animated-loop-3.gif'), // CC-BY-SA-4.0 Petrus3743 https://commons.wikimedia.org/wiki/File:01-Goldener_Schnitt_Formel-Animation.gif
   inputSvg: getPath('check.svg'), // http://dev.w3.org/SVG/tools/svgweb/samples/svg-files/check.svg
+  inputSvgSmallViewBox: getPath('circle.svg'),
   inputSvgWithEmbeddedImages: getPath('struct-image-04-t.svg'), // https://dev.w3.org/SVG/profiles/1.2T/test/svg/struct-image-04-t.svg
+  inputAvif: getPath('sdr_cosmos12920_cicp1-13-6_yuv444_full_qp10.avif'), // CC by-nc-nd https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles/Netflix
 
   inputJPGBig: getPath('flowers.jpeg'),
 
@@ -115,13 +120,6 @@ module.exports = {
 
   inputV: getPath('vfile.v'),
 
-  outputJpg: getPath('output.jpg'),
-  outputPng: getPath('output.png'),
-  outputWebP: getPath('output.webp'),
-  outputV: getPath('output.v'),
-  outputTiff: getPath('output.tiff'),
-  outputZoinks: getPath('output.zoinks'), // an 'unknown' file extension
-
   testPattern: getPath('test-pattern.png'),
 
   // Path for tests requiring human inspection

test/leak/sharp.supp

@@ -39,6 +39,16 @@
   Memcheck:Cond
   obj:*/libjpeg.so*
 }
+{
+  value_jpeg_obj_static
+  Memcheck:Value8
+  obj:*/libvips.so*
+}
+{
+  cond_jpeg_obj_static
+  Memcheck:Cond
+  obj:*/libvips.so*
+}
 {
   param_jpeg_jpeg_finish_compress
   Memcheck:Param
@@ -179,6 +189,24 @@
   ...
   fun:gsf_output_write
 }
+{
+  param_gsf_new_do_write
+  Memcheck:Param
+  write(buf)
+  ...
+  fun:new_do_write
+  ...
+  fun:gsf_output_close
+}
+{
+  param_gsf_output_write
+  Memcheck:Param
+  write(buf)
+  ...
+  fun:new_do_write
+  ...
+  fun:gsf_output_write
+}
 
 # fontconfig
 {
@@ -208,6 +236,84 @@
   fun:XML_ParseBuffer
   obj:*/libfontconfig.so.*
 }
+{
+  leak_fontconfig_FcInitLoadConfigAndFonts
+  Memcheck:Leak
+  match-leak-kinds: definite
+  fun:malloc
+  ...
+  fun:XML_ParseBuffer
+  ...
+  fun:FcInitLoadConfigAndFonts
+}
+
+# heif
+{
+  cond_heif_encode_image
+  Memcheck:Cond
+  ...
+  fun:heif_context_encode_image
+}
+{
+  value8_heif_encode_image
+  Memcheck:Value8
+  ...
+  fun:heif_context_encode_image
+}
+{
+  cond_heif_aom_codec_encode
+  Memcheck:Cond
+  ...
+  fun:aom_codec_encode
+}
+{
+  value8_heif_aom_codec_encode
+  Memcheck:Value8
+  ...
+  fun:aom_codec_encode
+}
+{
+  value1_heif_aom_codec_encode
+  Memcheck:Value1
+  ...
+  fun:aom_codec_encode
+}
+{
+  cond_heif_av1_encode_frame
+  Memcheck:Cond
+  ...
+  fun:av1_encode_frame
+}
+{
+  value8_heif_av1_encode_frame
+  Memcheck:Value8
+  ...
+  fun:av1_encode_frame
+}
+{
+  cond_heif_context_write
+  Memcheck:Cond
+  ...
+  fun:heif_context_write
+}
+{
+  value8_heif_context_write
+  Memcheck:Value8
+  ...
+  fun:heif_context_write
+}
+{
+  cond_heif_context_read
+  Memcheck:Cond
+  ...
+  fun:heif_context_read_from_reader
+}
+{
+  value8_heif_context_read
+  Memcheck:Value8
+  ...
+  fun:heif_context_read_from_reader
+}
 
 # libvips
 {
@@ -296,6 +402,40 @@
   ...
   fun:start_thread
 }
+{
+  cond_libvips_source_read
+  Memcheck:Cond
+  ...
+  fun:vips_source_read
+}
+{
+  value8_libvips_source_read
+  Memcheck:Value8
+  ...
+  fun:vips_source_read
+}
+{
+  cond_libvips_target_finish
+  Memcheck:Cond
+  ...
+  fun:vips_target_finish
+}
+{
+  value8_libvips_target_finish
+  Memcheck:Value8
+  ...
+  fun:vips_target_finish
+}
+{
+  value8_libvips_static
+  Memcheck:Value8
+  obj:*/libvips-cpp.so.*
+}
+{
+  cond_libvips_static
+  Memcheck:Cond
+  obj:*/libvips-cpp.so.*
+}
 {
   leak_libvips_init
   Memcheck:Leak
@@ -304,6 +444,42 @@
   ...
   fun:vips__init
 }
+{
+  leak_rsvg_static_data
+  Memcheck:Leak
+  match-leak-kinds: definite
+  fun:malloc
+  ...
+  fun:rsvg_handle_new_from_stream_sync
+}
+{
+  leak_rsvg_rsvg_rust_handle_new_from_gfile_sync
+  Memcheck:Leak
+  match-leak-kinds: definite
+  fun:malloc
+  ...
+  fun:rsvg_handle_new_from_gfile_sync
+}
+{
+  leak_rsvg_rust_handle_new_from_stream_sync
+  Memcheck:Leak
+  match-leak-kinds: possible
+  fun:malloc
+  ...
+  fun:xmlParseElement
+  ...
+  fun:rsvg_handle_new_from_stream_sync
+}
+{
+  leak_rsvg_rust_handle_new_from_gfile_sync
+  Memcheck:Leak
+  match-leak-kinds: possible
+  fun:malloc
+  ...
+  fun:xmlParseElement
+  ...
+  fun:rsvg_handle_new_from_gfile_sync
+}
 
 # libuv warnings
 {
@@ -418,6 +594,13 @@
   ...
   fun:_ZN4node17CreateEnvironmentEPN2v87IsolateEP9uv_loop_sNS0_5LocalINS0_7ContextEEEiPKPKciSB_
 }
+{
+  leak_nodejs_CreateEnvironment_IsolateData
+  Memcheck:Leak
+  match-leak-kinds: possible
+  ...
+  fun:_ZN4node17CreateEnvironmentEPNS_11IsolateDataEN2v85LocalINS2_7ContextEEERKSt6vectorISsSaISsEESA_NS_16EnvironmentFlags5FlagsENS_8ThreadIdESt10unique_ptrINS_21InspectorParentHandleESt14default_deleteISF_EE
+}
 {
   leak_nodejs_Environment_Start
   Memcheck:Leak
@@ -664,3 +847,27 @@
   ...
   fun:_ZN12v8_inspector10toString16ERKNS_10StringViewE
 }
+{
+  cond_v8_Builtins_InterpreterEntryTrampoline
+  Memcheck:Cond
+  ...
+  fun:Builtins_InterpreterEntryTrampoline
+}
+{
+  cond_v8_ZN2v88internal18ArrayBufferSweeper9SweepFullEv
+  Memcheck:Cond
+  ...
+  fun:_ZN2v88internal18ArrayBufferSweeper9SweepFullEv
+}
+{
+  cond_v8_ZN4node11Environment27RunAndClearNativeImmediatesEb
+  Memcheck:Cond
+  ...
+  fun:_ZN4node11Environment27RunAndClearNativeImmediatesEb
+}
+{
+  cond_v8_ZN2v88internal18ArrayBufferSweeper10ReleaseAllEv
+  Memcheck:Cond
+  ...
+  fun:_ZN2v88internal18ArrayBufferSweeper10ReleaseAllEv
+}

test/unit/affine.js

@@ -0,0 +1,175 @@
+'use strict';
+
+const assert = require('assert');
+
+const sharp = require('../../');
+const fixtures = require('../fixtures');
+
+describe('Affine transform', () => {
+  describe('Invalid input', () => {
+    it('Missing matrix', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine();
+      });
+    });
+    it('Invalid 1d matrix', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine(['123', 123, 123, 123]);
+      });
+    });
+    it('Invalid 2d matrix', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[123, 123], [null, 123]]);
+      });
+    });
+    it('Invalid options parameter type', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[1, 0], [0, 1]], 'invalid options type');
+      });
+    });
+    it('Invalid background color', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([4, 4, 4, 4], { background: 'not a color' });
+      });
+    });
+    it('Invalid idx offset type', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[4, 4], [4, 4]], { idx: 'invalid idx type' });
+      });
+    });
+    it('Invalid idy offset type', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([4, 4, 4, 4], { idy: 'invalid idy type' });
+      });
+    });
+    it('Invalid odx offset type', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[4, 4], [4, 4]], { odx: 'invalid odx type' });
+      });
+    });
+    it('Invalid ody offset type', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[4, 4], [4, 4]], { ody: 'invalid ody type' });
+      });
+    });
+    it('Invalid interpolator', () => {
+      assert.throws(() => {
+        sharp(fixtures.inputJpg)
+          .affine([[4, 4], [4, 4]], { interpolator: 'cubic' });
+      });
+    });
+  });
+  it('Applies identity matrix', done => {
+    const input = fixtures.inputJpg;
+    sharp(input)
+      .affine([[1, 0], [0, 1]])
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(input, data, done);
+      });
+  });
+  it('Applies resize affine matrix', done => {
+    const input = fixtures.inputJpg;
+    const inputWidth = 2725;
+    const inputHeight = 2225;
+    sharp(input)
+      .affine([[0.2, 0], [0, 1.5]])
+      .toBuffer((err, data, info) => {
+        if (err) throw err;
+        fixtures.assertSimilar(input, data, done);
+        assert.strictEqual(info.width, Math.ceil(inputWidth * 0.2));
+        assert.strictEqual(info.height, Math.ceil(inputHeight * 1.5));
+      });
+  });
+  it('Resizes and applies affine transform', done => {
+    const input = fixtures.inputJpg;
+    sharp(input)
+      .resize(500, 500)
+      .affine([[0.5, 1], [1, 0.5]])
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(data, fixtures.expected('affine-resize-expected.jpg'), done);
+      });
+  });
+  it('Extracts and applies affine transform', done => {
+    sharp(fixtures.inputJpg)
+      .extract({ left: 300, top: 300, width: 600, height: 600 })
+      .affine([0.3, 0, -0.5, 0.3])
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(data, fixtures.expected('affine-extract-expected.jpg'), done);
+      });
+  });
+  it('Rotates and applies affine transform', done => {
+    sharp(fixtures.inputJpg320x240)
+      .rotate(90)
+      .affine([[-1.2, 0], [0, -1.2]])
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(data, fixtures.expected('affine-rotate-expected.jpg'), done);
+      });
+  });
+  it('Extracts, rotates and applies affine transform', done => {
+    sharp(fixtures.inputJpg)
+      .extract({ left: 1000, top: 1000, width: 200, height: 200 })
+      .rotate(45, { background: 'blue' })
+      .affine([[2, 1], [2, -0.5]], { background: 'red' })
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(fixtures.expected('affine-extract-rotate-expected.jpg'), data, done);
+      });
+  });
+  it('Applies affine transform with background color', done => {
+    sharp(fixtures.inputJpg320x240)
+      .rotate(180)
+      .affine([[-1.5, 1.2], [-1, 1]], { background: 'red' })
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(fixtures.expected('affine-background-expected.jpg'), data, done);
+      });
+  });
+  it('Applies affine transform with background color and output offsets', done => {
+    sharp(fixtures.inputJpg320x240)
+      .rotate(180)
+      .affine([[-2, 1.5], [-1, 2]], { background: 'blue', odx: 40, ody: -100 })
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(fixtures.expected('affine-background-output-offsets-expected.jpg'), data, done);
+      });
+  });
+  it('Applies affine transform with background color and all offsets', done => {
+    sharp(fixtures.inputJpg320x240)
+      .rotate(180)
+      .affine([[-1.2, 1.8], [-1, 2]], { background: 'yellow', idx: 10, idy: -40, odx: 10, ody: -50 })
+      .toBuffer((err, data) => {
+        if (err) throw err;
+        fixtures.assertSimilar(fixtures.expected('affine-background-all-offsets-expected.jpg'), data, done);
+      });
+  });
+  describe('Interpolations', () => {
+    const input = fixtures.inputJpg320x240;
+    const inputWidth = 320;
+    const inputHeight = 240;
+    for (const interp in sharp.interpolators) {
+      it(`Performs 2x upscale with ${interp} interpolation`, done => {
+        sharp(input)
+          .affine([[2, 0], [0, 2]], { interpolator: sharp.interpolators[interp] })
+          .toBuffer((err, data, info) => {
+            if (err) throw err;
+            assert.strictEqual(info.width, Math.ceil(inputWidth * 2));
+            assert.strictEqual(info.height, Math.ceil(inputHeight * 2));
+            fixtures.assertSimilar(fixtures.expected(`affine-${sharp.interpolators[interp]}-2x-upscale-expected.jpg`), data, done);
+          });
+      });
+    }
+  });
+});

test/unit/avif.js

@@ -0,0 +1,84 @@
+'use strict';
+
+const assert = require('assert');
+
+const sharp = require('../../');
+const { inputAvif, inputJpg } = require('../fixtures');
+
+describe('AVIF', () => {
+  it('called without options does not throw an error', () => {
+    assert.doesNotThrow(() => {
+      sharp().avif();
+    });
+  });
+
+  it('can convert AVIF to JPEG', async () => {
+    const data = await sharp(inputAvif)
+      .resize(32)
+      .jpeg()
+      .toBuffer();
+    const metadata = await sharp(data)
+      .metadata();
+    const { compression, size, ...metadataWithoutSize } = metadata;
+    assert.deepStrictEqual(metadataWithoutSize, {
+      channels: 3,
+      chromaSubsampling: '4:2:0',
+      density: 72,
+      depth: 'uchar',
+      format: 'jpeg',
+      hasAlpha: false,
+      hasProfile: false,
+      height: 13,
+      isProgressive: false,
+      space: 'srgb',
+      width: 32
+    });
+  });
+
+  it('can convert JPEG to AVIF', async () => {
+    const data = await sharp(inputJpg)
+      .resize(32)
+      .avif()
+      .toBuffer();
+    const metadata = await sharp(data)
+      .metadata();
+    const { compression, size, ...metadataWithoutSize } = metadata;
+    assert.deepStrictEqual(metadataWithoutSize, {
+      channels: 3,
+      depth: 'uchar',
+      format: 'heif',
+      hasAlpha: false,
+      hasProfile: false,
+      height: 26,
+      isProgressive: false,
+      pageHeight: 26,
+      pagePrimary: 0,
+      pages: 1,
+      space: 'srgb',
+      width: 32
+    });
+  });
+
+  it('can passthrough AVIF', async () => {
+    const data = await sharp(inputAvif)
+      .resize(32)
+      .toBuffer();
+    const metadata = await sharp(data)
+      .metadata();
+    const { compression, size, ...metadataWithoutSize } = metadata;
+    assert.deepStrictEqual(metadataWithoutSize, {
+      channels: 3,
+      depth: 'uchar',
+      format: 'heif',
+      hasAlpha: false,
+      hasProfile: false,
+      height: 12,
+      isProgressive: false,
+      pageHeight: 12,
+      pagePrimary: 0,
+      pages: 1,
+      space: 'srgb',
+      width: 32
+    });
+  });
+});

test/unit/composite.js

@@ -172,6 +172,24 @@ describe('composite', () => {
       });
   });
 
+  it('negative offset and gravity', done => {
+    sharp(fixtures.inputJpg)
+      .resize(400)
+      .composite([{
+        input: fixtures.inputPngWithTransparency16bit,
+        left: -10,
+        top: -10,
+        gravity: 4
+      }])
+      .toBuffer((err, data, info) => {
+        if (err) throw err;
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(3, info.channels);
+        fixtures.assertSimilar(
+          fixtures.expected('overlay-negative-offset-with-gravity.jpg'), data, done);
+      });
+  });
+
   it('offset, gravity and tile', done => {
     sharp(fixtures.inputJpg)
       .resize(80)
@@ -333,13 +351,25 @@ describe('composite', () => {
     it('invalid left', () => {
       assert.throws(() => {
         sharp().composite([{ input: 'test', left: 0.5 }]);
-      }, /Expected positive integer for left but received 0.5 of type number/);
+      }, /Expected integer for left but received 0.5 of type number/);
+      assert.throws(() => {
+        sharp().composite([{ input: 'test', left: 'invalid' }]);
+      }, /Expected integer for left but received invalid of type string/);
+      assert.throws(() => {
+        sharp().composite([{ input: 'test', left: 'invalid', top: 10 }]);
+      }, /Expected integer for left but received invalid of type string/);
     });
 
     it('invalid top', () => {
       assert.throws(() => {
-        sharp().composite([{ input: 'test', top: -1 }]);
-      }, /Expected positive integer for top but received -1 of type number/);
+        sharp().composite([{ input: 'test', top: 0.5 }]);
+      }, /Expected integer for top but received 0.5 of type number/);
+      assert.throws(() => {
+        sharp().composite([{ input: 'test', top: 'invalid' }]);
+      }, /Expected integer for top but received invalid of type string/);
+      assert.throws(() => {
+        sharp().composite([{ input: 'test', top: 'invalid', left: 10 }]);
+      }, /Expected integer for top but received invalid of type string/);
     });
 
     it('left but no top', () => {

test/unit/extractChannel.js

@@ -80,6 +80,19 @@ describe('Image channel extraction', function () {
       });
   });
 
+  it('Alpha from 2-channel input', function (done) {
+    const output = fixtures.path('output.extract-alpha-2-channel.png');
+    sharp(fixtures.inputPngWithGreyAlpha)
+      .extractChannel('alpha')
+      .toColourspace('b-w')
+      .toFile(output, function (err, info) {
+        if (err) throw err;
+        assert.strictEqual(1, info.channels);
+        fixtures.assertMaxColourDistance(output, fixtures.expected('extract-alpha-2-channel.png'));
+        done();
+      });
+  });
+
   it('Invalid channel number', function () {
     assert.throws(function () {
       sharp(fixtures.inputJpg)
@@ -94,7 +107,7 @@ describe('Image channel extraction', function () {
     });
   });
 
-  it('Non-existant channel', function (done) {
+  it('Non-existent channel', function (done) {
     sharp(fixtures.inputPng)
       .extractChannel(1)
       .toBuffer(function (err) {