Prerelease v0.26.0-alpha2

CI: ensure git tag is available inside prebuild containers
Prerelease v0.26.0-alpha1
2026-02-04 13:46:19 +01:00 · 2020-08-18 14:01:19 +01:00 · 2020-08-18 14:00:14 +01:00 · 2020-08-18 09:39:09 +01:00 · 2020-08-18 09:37:57 +01:00 · 2020-08-17 16:20:10 +01:00
55 changed files with 1689 additions and 884 deletions
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
+        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_10.x | bash -"
        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
      install: sudo docker exec sharp bash -c "npm install --unsafe-perm"
@@ -16,29 +16,18 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_12.x | bash -"
        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
      install: sudo docker exec sharp bash -c "npm install --unsafe-perm"
      script: sudo docker exec sharp bash -c "npm test"

-    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 13"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
-        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_13.x | bash -"
-        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
-      install: sudo docker exec sharp bash -c "npm install --unsafe-perm"
-      script: sudo docker exec sharp bash -c "npm test"
-
    - name: "Linux x64 (CentOS 7, glibc 2.17) - Node.js 14"
      os: linux
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp centos:7
        - sudo docker exec sharp bash -c "curl -sL https://rpm.nodesource.com/setup_14.x | bash -"
        - sudo docker exec sharp yum install -y gcc-c++ make git nodejs
      install: sudo docker exec sharp bash -c "npm install --unsafe-perm"
@@ -49,7 +38,7 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:10.17.0-alpine3.9 # https://github.com/nodejs/docker-node/issues/1158
+        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:10.17.0-alpine3.9 # https://github.com/nodejs/docker-node/issues/1158
        - sudo docker exec sharp apk add build-base git python2 --update-cache
      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
      script: sudo docker exec sharp sh -c "npm test"
@@ -59,17 +48,7 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${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 x64 (Alpine 3.11, musl 1.1.20) - Node.js 13"
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:13.0-alpine
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:12.0-alpine
        - sudo docker exec sharp apk add build-base git python2 --update-cache
      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
      script: sudo docker exec sharp sh -c "npm test"
@@ -79,7 +58,7 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:14.0-alpine
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp node:14.0-alpine
        - sudo docker exec sharp apk add build-base git python2 --update-cache
      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
      script: sudo docker exec sharp sh -c "npm test"
@@ -90,11 +69,11 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
+        - sudo docker run -dit --name sharp --env CI --env TRAVIS_TAG --env prebuild_upload --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_10.x buster main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
+        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs=10.*"
      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
      script: sudo docker exec sharp sh -c "npm test"

@@ -104,7 +83,7 @@ jobs:
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_12.x buster main' >/etc/apt/sources.list.d/nodesource.list"
@@ -112,27 +91,13 @@ jobs:
      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
      script: sudo docker exec sharp sh -c "npm test"

-    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 13"
-      arch: arm64
-      os: linux
-      dist: bionic
-      language: shell
-      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
-        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
-        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_13.x buster main' >/etc/apt/sources.list.d/nodesource.list"
-        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y nodejs"
-      install: sudo docker exec sharp sh -c "npm install --unsafe-perm"
-      script: sudo docker exec sharp sh -c "npm test"
-
    - name: "Linux ARM64v8 (Debian 11, glibc 2.29) - Node.js 14"
      arch: arm64
      os: linux
      dist: bionic
      language: shell
      before_install:
-        - sudo docker run -dit --name sharp --env CI --env PREBUILD_TOKEN --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
+        - sudo docker run -dit --name sharp --env CI --volume "${PWD}:/mnt/sharp" --workdir /mnt/sharp arm64v8/debian:bullseye
        - sudo docker exec sharp sh -c "apt-get update && apt-get install -y build-essential git python2 curl"
        - sudo docker exec sharp sh -c "curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -"
        - sudo docker exec sharp sh -c "echo 'deb https://deb.nodesource.com/node_14.x buster main' >/etc/apt/sources.list.d/nodesource.list"
@@ -151,25 +116,21 @@ jobs:
      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"
+      before_install: unset prebuild_upload

    - name: "macOS (10.13) - Node.js 14"
      os: osx
      osx_image: xcode10.1
      language: node_js
      node_js: "14"
+      before_install: unset prebuild_upload

    - name: "Unit test coverage report"
      os: linux
      dist: bionic
      language: node_js
      node_js: "13"
-      before_install: unset PREBUILD_TOKEN
+      before_install: unset prebuild_upload
      after_success:
        - npm install coveralls
        - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Lanczos resampling ensures quality is not sacrificed for speed.
 As well as image resizing, operations such as
 rotation, extraction, compositing and gamma correction are available.

-Most modern macOS, Windows and Linux systems running Node.js v10+
+Most modern macOS, Windows and Linux systems running Node.js v10.16.0+
 do not require any additional install or runtime dependencies.

 ## Examples
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,16 +9,16 @@ environment:
    platform: x64
  - nodejs_version: "12"
    platform: x86
+    prebuild_upload: ""
  - nodejs_version: "12"
    platform: x64
-  - nodejs_version: "13"
-    platform: x86
-  - nodejs_version: "13"
-    platform: x64
-  - nodejs_version: "14"
+    prebuild_upload: ""
+  - nodejs_version: "14.2.0"
    platform: x86
+    prebuild_upload: ""
  - nodejs_version: "14"
    platform: x64
+    prebuild_upload: ""
 install:
  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:platform
  - npm install
--- a/binding.gyp
+++ b/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': ''
@@ -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 +127,45 @@
              '_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',
+                'libvips.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'
            ],
-            '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=\'$${ORIGIN}/../../vendor/lib\''
-            ]
+            'link_settings': {
+              'library_dirs': ['<(sharp_vendor_dir)/lib'],
+              'libraries': [
+                '-l:libvips-cpp.so.42',
+                '-l:libvips.so.42'
+              ],
+              'ldflags': [
+                # Ensure runtime linking is relative to sharp.node
+                '-Wl,-s -Wl,--disable-new-dtags -Wl,-rpath=\'$$ORIGIN/../../vendor/<(vips_version)/lib\''
+              ]
+            }
          }]
        ]
      }]
@@ -178,8 +178,7 @@
    ],
    '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 +203,22 @@
          ['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': [
--- a/docs/README.md
+++ b/docs/README.md
@@ -16,7 +16,7 @@ Lanczos resampling ensures quality is not sacrificed for speed.
 As well as image resizing, operations such as
 rotation, extraction, compositing and gamma correction are available.

-Most modern macOS, Windows and Linux systems running Node.js v10+
+Most modern macOS, Windows and Linux systems running Node.js v10.16.0+
 do not require any additional install or runtime dependencies.

 ### Formats
--- a/docs/api-channel.md
+++ b/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

--- a/docs/api-constructor.md
+++ b/docs/api-constructor.md
@@ -2,32 +2,42 @@

 ## 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.
+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
+-   `input` **([Buffer][2] \| [string][3])?** if present, can be
     a Buffer containing JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data, or
     a String containing the filesystem path to an JPEG, PNG, WebP, GIF, SVG or TIFF image file.
     JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when not present.
-   `options` **[Object][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.
+-   `options` **[Object][4]?** if present, is an Object with optional attributes.
+    -   `options.failOnError` **[boolean][5]** by default halt processing and raise an error when loading invalid images.
         Set this flag to `false` if you'd rather apply a "best effort" to decode images, even if the data is corrupt or invalid. (optional, default `true`)
-    -   `options.limitInputPixels` **([Number][5] \| [Boolean][4])** Do not process input images where the number of pixels
+    -   `options.limitInputPixels` **([number][6] \| [boolean][5])** Do not process input images where the number of pixels
         (width x height) exceeds this limit. Assumes image dimensions contained in the input metadata can be trusted.
         An integral Number of pixels, zero or false to remove limit, true to use default limit of 268402689 (0x3FFF x 0x3FFF). (optional, default `268402689`)
-    -   `options.sequentialRead` **[Boolean][4]** Set this to `true` to use sequential rather than random access where possible.
+    -   `options.sequentialRead` **[boolean][5]** Set this to `true` to use sequential rather than random access where possible.
         This can reduce memory usage and might improve performance on some systems. (optional, default `false`)
-    -   `options.density` **[Number][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][6]** number representing the DPI for vector images. (optional, default `72`)
+    -   `options.pages` **[number][6]** number of pages to extract for multi-page input (GIF, TIFF, PDF), use -1 for all pages. (optional, default `1`)
+    -   `options.page` **[number][6]** page number to start extracting from for multi-page input (GIF, TIFF, PDF), zero based. (optional, default `0`)
+    -   `options.level` **[number][6]** level to extract from a multi-level input (OpenSlide), zero based. (optional, default `0`)
+    -   `options.raw` **[Object][4]?** describes raw pixel input image data. See `raw()` for pixel ordering.
+        -   `options.raw.width` **[number][6]?** 
+        -   `options.raw.height` **[number][6]?** 
+        -   `options.raw.channels` **[number][6]?** 1-4
+    -   `options.create` **[Object][4]?** describes a new image to be created.
+        -   `options.create.width` **[number][6]?** 
+        -   `options.create.height` **[number][6]?** 
+        -   `options.create.channels` **[number][6]?** 3-4
+        -   `options.create.background` **([string][3] \| [Object][4])?** parsed by the [color][7] module to extract values for red, green, blue and alpha.

 ### Examples

@@ -68,9 +78,9 @@ sharp({
 .then( ... );
 ```

-   Throws **[Error][7]** Invalid parameters
+-   Throws **[Error][8]** Invalid parameters

-Returns **[Sharp][8]** 
+Returns **[Sharp][9]** 

 ## clone

@@ -138,20 +148,22 @@ Promise.all(promises)
  });
 ```

-Returns **[Sharp][8]** 
+Returns **[Sharp][9]** 

-[1]: https://nodejs.org/api/buffer.html
+[1]: http://nodejs.org/api/stream.html#stream_class_stream_duplex

-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+[2]: https://nodejs.org/api/buffer.html

-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
+[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String

-[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
+[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object

-[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
+[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean

-[6]: https://www.npmjs.org/package/color
+[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

-[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+[7]: https://www.npmjs.org/package/color

-[8]: #sharp
+[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+
+[9]: #sharp
--- a/docs/api-input.md
+++ b/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]&lt;[Object][6]>** 

 [1]: https://libvips.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
--- a/docs/api-output.md
+++ b/docs/api-output.md
@@ -140,20 +140,22 @@ Returns **Sharp**

 Use these JPEG options for output image.

+Some of these options require the use of a globally-installed libvips compiled with support for mozjpeg.
+
 ### Parameters

 -   `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]** for quality &lt; 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled (optional, default `'4:2:0'`)
+    -   `options.chromaSubsampling` **[string][2]** set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling (optional, default `'4:2:0'`)
+    -   `options.optimiseCoding` **[boolean][7]** optimise Huffman coding tables (optional, default `true`)
+    -   `options.optimizeCoding` **[boolean][7]** alternative spelling of optimiseCoding (optional, default `true`)
    -   `options.trellisQuantisation` **[boolean][7]** apply trellis quantisation, requires libvips compiled with support for mozjpeg (optional, default `false`)
    -   `options.overshootDeringing` **[boolean][7]** apply overshoot deringing, requires libvips compiled with support for mozjpeg (optional, default `false`)
    -   `options.optimiseScans` **[boolean][7]** optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans (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.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans, requires libvips compiled with support for mozjpeg (optional, default `false`)
    -   `options.quantisationTable` **[number][9]** quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg (optional, default `0`)
-    -   `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable (optional, default `0`)
+    -   `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable, requires libvips compiled with support for mozjpeg (optional, default `0`)
    -   `options.force` **[boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)

 ### Examples
@@ -179,6 +181,8 @@ Use these PNG options for output image.
 PNG output is always 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.

+Some of these options require the use of a globally-installed libvips compiled with support for libimagequant (GPL).
+
 ### Parameters

 -   `options` **[Object][6]?** 
@@ -186,10 +190,10 @@ Indexed PNG input at 1, 2 or 4 bits per pixel is converted to 8 bits per pixel.
    -   `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.quality` **[number][9]** use the lowest number of colours needed to achieve given quality, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `100`)
+    -   `options.colours` **[number][9]** maximum number of palette entries, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `256`)
+    -   `options.colors` **[number][9]** alternative spelling of `options.colours`, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `256`)
+    -   `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, sets `palette` to `true`, requires libvips compiled with support for libimagequant (optional, default `1.0`)
    -   `options.force` **[boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`)

 ### Examples
@@ -218,6 +222,9 @@ Use these WebP options for output image.
    -   `options.nearLossless` **[boolean][7]** use near_lossless compression mode (optional, default `false`)
    -   `options.smartSubsample` **[boolean][7]** use high quality chroma subsampling (optional, default `false`)
    -   `options.reductionEffort` **[number][9]** level of CPU effort to reduce file size, integer 0-6 (optional, default `4`)
+    -   `options.pageHeight` **[number][9]?** page height for animated output
+    -   `options.loop` **[number][9]** number of animation iterations, use 0 for infinite animation (optional, default `0`)
+    -   `options.delay` **[Array][10]&lt;[number][9]>?** list of delays between animation frames (in milliseconds)
    -   `options.force` **[boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`)

 ### Examples
@@ -229,6 +236,27 @@ 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]&lt;[number][9]>?** list of delays between animation frames (in milliseconds)
+    -   `options.force` **[boolean][7]** force GIF output, otherwise attempt to use input format (optional, default `true`)
+
+
 -   Throws **[Error][4]** Invalid options

 Returns **Sharp** 
@@ -250,7 +278,7 @@ Use these TIFF options for output image.
    -   `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.bitdepth` **[boolean][7]** reduce bitdepth to 1, 2 or 4 bit (optional, default `8`)

 ### Examples

@@ -259,7 +287,7 @@ Use these TIFF options for output image.
 sharp('input.svg')
  .tiff({
    compression: 'lzw',
-    squash: true
+    bitdepth: 1
  })
  .toFile('1-bpp-output.tiff')
  .then(info => { ... });
@@ -337,7 +365,7 @@ Warning: multiple sharp instances concurrently producing tile output can expose
    -   `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.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'`)
@@ -379,4 +407,8 @@ 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
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,9 +1,63 @@
 # Changelog

+## v0.26 - *zoom*
+
+Requires libvips v8.10.0
+
+### v0.26.0 - TBD
+
+* 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)
+
+* 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.
--- a/docs/humans.txt
+++ b/docs/humans.txt
@@ -182,3 +182,15 @@ 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
--- a/docs/index.html
+++ b/docs/index.html
--- a/docs/install.md
+++ b/docs/install.md
@@ -10,19 +10,19 @@ yarn add sharp

 ## Prerequisites

-* Node.js v10+
+* Node.js v10.16.0+

 ## Prebuilt binaries

 Ready-compiled sharp and libvips binaries are provided for use with
-Node.js v10+ on the most common platforms:
+Node.js v10.16.0+ on the most common platforms:

 * macOS x64 (>= 10.13)
 * Linux x64 (glibc >= 2.17, musl >= 1.1.24)
 * Linux ARM64 (glibc >= 2.29)
 * Windows

-A ~10MB tarball containing libvips and its most commonly used dependencies
+A ~7MB 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
@@ -81,24 +81,41 @@ 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.
+
+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`.
+
+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

@@ -160,3 +177,10 @@ npx electron-rebuild

 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.
--- a/docs/search-index.json
+++ b/docs/search-index.json
--- a/install/dll-copy.js
+++ b/install/dll-copy.js
@@ -6,6 +6,8 @@ const path = require('path');
 const libvips = require('../lib/libvips');
 const npmLog = require('npmlog');

+const minimumLibvipsVersion = libvips.minimumLibvipsVersion;
+
 const platform = process.env.npm_config_platform || process.platform;
 if (platform === 'win32') {
  const buildDir = path.join(__dirname, '..', 'build');
@@ -15,7 +17,7 @@ if (platform === 'win32') {
    libvips.mkdirSync(buildDir);
    libvips.mkdirSync(buildReleaseDir);
  } catch (err) {}
-  const vendorLibDir = path.join(__dirname, '..', 'vendor', 'lib');
+  const vendorLibDir = path.join(__dirname, '..', 'vendor', minimumLibvipsVersion, 'lib');
  npmLog.info('sharp', `Copying DLLs from ${vendorLibDir} to ${buildReleaseDir}`);
  try {
    fs
--- a/install/libvips.js
+++ b/install/libvips.js
@@ -3,12 +3,14 @@
 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');
@@ -21,7 +23,8 @@ const minimumGlibcVersionByArch = {
 };

 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 fail = function (err) {
  npmLog.error('sharp', err.message);
@@ -36,18 +39,21 @@ const fail = function (err) {
 const extractTarball = function (tarPath) {
  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);
+  stream.pipeline(
+    fs.createReadStream(tarPath),
+    new zlib.BrotliDecompress(),
+    tarFs.extract(versionedVendorPath),
+    function (err) {
+      if (err) {
+        if (/unexpected end of file/.test(err.message)) {
+          npmLog.error('sharp', `Please delete ${tarPath} as it is not a valid tarball`);
+        }
+        fail(err);
      }
-      fail(err);
-    });
+    }
+  );
 };

 try {
@@ -75,7 +81,7 @@ try {
      }
    }
    // Download to per-process temporary file
-    const tarFilename = ['libvips', minimumLibvipsVersion, platformAndArch].join('-') + '.tar.gz';
+    const tarFilename = ['libvips', minimumLibvipsVersion, platformAndArch].join('-') + '.tar.br';
    const tarPathCache = path.join(libvips.cachePath(), tarFilename);
    if (fs.existsSync(tarPathCache)) {
      npmLog.info('sharp', `Using cached ${tarPathCache}`);
--- a/install/prebuild-ci.js
+++ b/install/prebuild-ci.js
@@ -0,0 +1,9 @@
+'use strict';
+
+const { execFileSync } = require('child_process');
+
+const { prebuild_upload: hasToken, APPVEYOR_REPO_TAG_NAME, TRAVIS_TAG } = process.env;
+
+if (hasToken && (APPVEYOR_REPO_TAG_NAME || TRAVIS_TAG)) {
+  execFileSync('prebuild', ['--runtime', 'napi', '--target', '3'], { stdio: 'inherit' });
+}
--- a/lib/channel.js
+++ b/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;
 }
--- a/lib/constructor.js
+++ b/lib/constructor.js
@@ -38,15 +38,20 @@ 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.
 * 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 +86,31 @@ const debuglog = util.debuglog('sharp');
 * .toBuffer()
 * .then( ... );
 *
- * @param {(Buffer|String)} [input] - if present, can be
+ * @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.
 * @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.
+ * @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.level=0] - level to extract from a multi-level input (OpenSlide), zero based.
 * @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]
+ * @param {number} [options.raw.height]
+ * @param {number} [options.raw.channels] - 1-4
 * @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]
+ * @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.
 * @returns {Sharp}
 * @throws {Error} Invalid parameters
 */
@@ -208,7 +214,7 @@ const Sharp = function (input, options) {
    tiffCompression: 'jpeg',
    tiffPredictor: 'horizontal',
    tiffPyramid: false,
-    tiffSquash: false,
+    tiffBitdepth: 8,
    tiffTile: false,
    tiffTileHeight: 256,
    tiffTileWidth: 256,
@@ -229,7 +235,10 @@ const Sharp = function (input, options) {
    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);
--- a/lib/input.js
+++ b/lib/input.js
@@ -113,6 +113,14 @@ 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 (
@@ -208,6 +216,7 @@ 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
@@ -290,6 +299,8 @@ 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);
@@ -299,6 +310,10 @@ 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>}
 */
--- a/lib/is.js
+++ b/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 +45,7 @@ const bool = function (val) {
 * @private
 */
 const buffer = function (val) {
-  return object(val) && val instanceof Buffer;
+  return val instanceof Buffer;
 };

 /**
@@ -69,7 +69,7 @@ const number = function (val) {
 * @private
 */
 const integer = function (val) {
-  return number(val) && val % 1 === 0;
+  return Number.isInteger(val);
 };

 /**
@@ -85,7 +85,7 @@ const inRange = function (val, min, max) {
 * @private
 */
 const inArray = function (val, list) {
-  return list.indexOf(val) !== -1;
+  return list.includes(val);
 };

 /**
--- a/lib/libvips.js
+++ b/lib/libvips.js
@@ -48,24 +48,18 @@ 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;
--- a/lib/output.js
+++ b/lib/output.js
@@ -11,7 +11,8 @@ const formats = new Map([
  ['png', 'png'],
  ['raw', 'raw'],
  ['tiff', 'tiff'],
-  ['webp', 'webp']
+  ['webp', 'webp'],
+  ['gif', 'gif']
 ]);

 /**
@@ -173,6 +174,8 @@ function toFormat (format, options) {
 /**
 * Use these JPEG options for output image.
 *
+ * Some of these options require the use of a globally-installed libvips compiled with support for mozjpeg.
+ *
 * @example
 * // Convert any input to very high quality JPEG output
 * const data = await sharp(input)
@@ -185,15 +188,15 @@ function toFormat (format, options) {
 * @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'] - for quality < 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled
+ * @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.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 {boolean} [options.optimizeScans=false] - alternative spelling of optimiseScans, requires libvips compiled with support for mozjpeg
 * @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 {number} [options.quantizationTable=0] - alternative spelling of quantisationTable, requires libvips compiled with support for mozjpeg
 * @param {boolean} [options.force=true] - force JPEG output, otherwise attempt to use input format
 * @returns {Sharp}
 * @throws {Error} Invalid options
@@ -253,6 +256,8 @@ function jpeg (options) {
 * PNG output is always 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.
 *
+ * Some of these options require the use of a globally-installed libvips compiled with support for libimagequant (GPL).
+ *
 * @example
 * // Convert any input to PNG output
 * const data = await sharp(input)
@@ -264,10 +269,10 @@ function jpeg (options) {
 * @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 {number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, sets `palette` to `true`, requires libvips compiled with support for libimagequant
+ * @param {number} [options.colours=256] - maximum number of palette entries, sets `palette` to `true`, requires libvips compiled with support for libimagequant
+ * @param {number} [options.colors=256] - alternative spelling of `options.colours`, sets `palette` to `true`, requires libvips compiled with support for libimagequant
+ * @param {number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, sets `palette` to `true`, requires libvips compiled with support for libimagequant
 * @param {boolean} [options.force=true] - force PNG output, otherwise attempt to use input format
 * @returns {Sharp}
 * @throws {Error} Invalid options
@@ -289,28 +294,30 @@ 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);
        }
      }
    }
@@ -334,6 +341,9 @@ function png (options) {
 * @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
@@ -369,9 +379,72 @@ 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
+ */
+function gif (options) {
+  if (!this.constructor.format.magick.output.buffer) {
+    throw new Error('The gif operation requires libvips to have been installed with support for ImageMagick');
+  }
+  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.
 *
@@ -380,7 +453,7 @@ function webp (options) {
 * sharp('input.svg')
 *   .tiff({
 *     compression: 'lzw',
- *     squash: true
+ *     bitdepth: 1
 *   })
 *   .toFile('1-bpp-output.tiff')
 *   .then(info => { ... });
@@ -396,7 +469,7 @@ function webp (options) {
 * @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 {boolean} [options.bitdepth=8] - reduce bitdepth to 1, 2 or 4 bit
 * @returns {Sharp}
 * @throws {Error} Invalid options
 */
@@ -409,8 +482,12 @@ 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)) {
@@ -798,6 +875,7 @@ module.exports = function (Sharp) {
    webp,
    tiff,
    heif,
+    gif,
    raw,
    tile,
    // Private
--- a/lib/platform.js
+++ b/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${env.npm_config_arm_version || '8'}`);
  } else {
--- a/lib/utility.js
+++ b/lib/utility.js
@@ -23,7 +23,7 @@ let versions = {
  vips: sharp.libvipsVersion()
 };
 try {
-  versions = require('../vendor/versions.json');
+  versions = require(`../vendor/${versions.vips}/versions.json`);
 } catch (err) {}

 /**
--- a/package.json
+++ b/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": "0.25.3",
+  "version": "0.26.0-alpha2",
  "author": "Lovell Fuller <npm@lovell.info>",
  "homepage": "https://github.com/lovell/sharp",
  "contributors": [
@@ -66,12 +66,14 @@
    "Paul Neave <paul.neave@gmail.com>",
    "Brendan Kennedy <brenwken@gmail.com>",
    "Brychan Bennett-Odlum <git@brychan.io>",
-    "Edward Silverton <e.silverton@gmail.com>"
+    "Edward Silverton <e.silverton@gmail.com>",
+    "Roman Malieiev <aromaleev@gmail.com>",
+    "Tomas Szabo <tomas.szabo@deftomat.com>"
  ],
  "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 && node install/prebuild-ci",
    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=5000 --timeout=60000 ./test/unit/*.js",
    "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;MIT\"",
    "test-coverage": "./test/coverage/report.sh",
@@ -84,6 +86,7 @@
  "files": [
    "binding.gyp",
    "install/**",
+    "!install/prebuild-ci.js",
    "lib/**",
    "src/**"
  ],
@@ -112,34 +115,35 @@
    "detect-libc": "^1.0.3",
    "node-addon-api": "^3.0.0",
    "npmlog": "^4.1.2",
-    "prebuild-install": "^5.3.3",
+    "prebuild-install": "^5.3.5",
    "semver": "^7.3.2",
    "simple-get": "^4.0.0",
-    "tar": "^6.0.2",
+    "tar-fs": "^2.1.0",
    "tunnel-agent": "^0.6.0"
  },
  "devDependencies": {
    "async": "^3.2.0",
    "cc": "^2.0.1",
    "decompress-zip": "^0.3.2",
-    "documentation": "^13.0.0",
+    "documentation": "^13.0.2",
    "exif-reader": "^1.0.3",
-    "icc": "^1.0.0",
+    "icc": "^2.0.0",
    "license-checker": "^25.0.1",
-    "mocha": "^7.1.2",
+    "mocha": "^8.1.1",
    "mock-fs": "^4.12.0",
-    "nyc": "^15.0.1",
+    "nyc": "^15.1.0",
    "prebuild": "^10.0.0",
-    "prebuild-ci": "^3.1.0",
    "rimraf": "^3.0.2",
-    "semistandard": "^14.2.0"
+    "semistandard": "^14.2.3"
  },
  "license": "Apache-2.0",
  "config": {
-    "libvips": "8.9.1"
+    "libvips": "8.10.0-rc4",
+    "runtime": "napi",
+    "target": 3
  },
  "engines": {
-    "node": ">=10"
+    "node": ">=10.16.0"
  },
  "funding": {
    "url": "https://opencollective.com/libvips"
--- a/src/common.cc
+++ b/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();
  }
@@ -58,6 +62,14 @@ namespace sharp {
    }
    return rgba;
  }
+  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
  InputDescriptor* CreateInputDescriptor(Napi::Object input) {
@@ -88,6 +100,10 @@ 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");
@@ -121,6 +137,9 @@ 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");
  }
@@ -169,32 +188,42 @@ namespace sharp {
    return id;
  }

+  std::map<std::string, ImageType> loaderToType = {
+    { "jpegload", ImageType::JPEG },
+    { "jpegload_buffer", ImageType::JPEG },
+    { "pngload", ImageType::PNG },
+    { "pngload_buffer", ImageType::PNG },
+    { "webpload", ImageType::WEBP },
+    { "webpload_buffer", ImageType::WEBP },
+    { "tiffload", ImageType::TIFF },
+    { "tiffload_buffer", ImageType::TIFF },
+    { "gifload", ImageType::GIF },
+    { "gifload_buffer", ImageType::GIF },
+    { "svgload", ImageType::SVG },
+    { "svgload_buffer", ImageType::SVG },
+    { "heifload", ImageType::HEIF },
+    { "heifload_buffer", ImageType::HEIF },
+    { "pdfload", ImageType::PDF },
+    { "pdfload_buffer", ImageType::PDF },
+    { "magickload", ImageType::MAGICK },
+    { "magickload_buffer", ImageType::MAGICK },
+    { "openslideload", ImageType::OPENSLIDE },
+    { "ppmload", ImageType::PPM },
+    { "fitsload", ImageType::FITS },
+    { "vipsload", ImageType::VIPS },
+    { "rawload", 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(vips_nickname_find(g_type_from_name(load)));
+      if (it != loaderToType.end()) {
+        imageType = it->second;
      }
    }
    return imageType;
@@ -207,36 +236,12 @@ 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(vips_nickname_find(g_type_from_name(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 +253,8 @@ namespace sharp {
  */
  bool ImageTypeSupportsPage(ImageType imageType) {
    return
+      imageType == ImageType::WEBP ||
+      imageType == ImageType::MAGICK ||
      imageType == ImageType::GIF ||
      imageType == ImageType::TIFF ||
      imageType == ImageType::HEIF ||
@@ -292,6 +299,9 @@ 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);
@@ -341,6 +351,9 @@ 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);
@@ -410,6 +423,38 @@ 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?
  */
@@ -440,14 +485,21 @@ namespace sharp {
    Check the proposed format supports the current dimensions.
  */
  void AssertImageTypeDimensions(VImage image, ImageType const imageType) {
+    const int height = image.get_typeof("pageHeight") == G_TYPE_INT
+      ? image.get_int("pageHeight")
+      : 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");
+      }
    }
  }

@@ -710,4 +762,25 @@ 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
--- a/src/common.h
+++ b/src/common.h
@@ -25,7 +25,7 @@
 // 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"
+#error "libvips version 8.9.2+ is required - please see https://sharp.pixelplumbing.com/install"
 #endif

 #if ((!defined(__clang__)) && defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)))
@@ -57,6 +57,7 @@ namespace sharp {
    int rawHeight;
    int pages;
    int page;
+    int level;
    int createChannels;
    int createWidth;
    int createHeight;
@@ -75,6 +76,7 @@ namespace sharp {
      rawHeight(0),
      pages(1),
      page(0),
+      level(0),
      createChannels(0),
      createWidth(0),
      createHeight(0),
@@ -86,10 +88,12 @@ 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<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);
@@ -123,6 +127,7 @@ 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 +187,12 @@ 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 +280,16 @@ 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_
--- a/src/libvips/cplusplus/VImage.cpp
+++ b/src/libvips/cplusplus/VImage.cpp
--- a/src/libvips/cplusplus/vips-operators.cpp
+++ b/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;
--- a/src/metadata.cc
+++ b/src/metadata.cc
@@ -74,6 +74,15 @@ class MetadataWorker : public Napi::AsyncWorker {
      if (image.get_typeof("heif-primary") == G_TYPE_INT) {
        baton->pagePrimary = image.get_int("heif-primary");
      }
+      if (image.get_typeof("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 +186,17 @@ class MetadataWorker : public Napi::AsyncWorker {
      if (baton->pagePrimary > -1) {
        info.Set("pagePrimary", baton->pagePrimary);
      }
+      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) {
--- a/src/metadata.h
+++ b/src/metadata.h
@@ -39,6 +39,7 @@ struct MetadataBaton {
  int loop;
  std::vector<int> delay;
  int pagePrimary;
+  std::vector<std::pair<int, int>> levels;
  bool hasProfile;
  bool hasAlpha;
  int orientation;
--- a/src/operations.cc
+++ b/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
   */
--- a/src/operations.h
+++ b/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
   */
--- a/src/pipeline.cc
+++ b/src/pipeline.cc
@@ -645,8 +645,12 @@ 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
@@ -689,6 +693,16 @@ 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
@@ -699,7 +713,9 @@ 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)
@@ -716,8 +732,8 @@ 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()
@@ -751,6 +767,18 @@ 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 = VIPS_AREA(image.magicksave_buffer(VImage::option()
+            ->set("strip", !baton->withMetadata)
+            ->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
@@ -765,7 +793,7 @@ class PipelineWorker : public Napi::AsyncWorker {
          VipsArea *area = VIPS_AREA(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)
@@ -826,13 +854,16 @@ 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 || isDz || isDzZip || isV);
+
        if (baton->formatOut == "jpeg" || (mightMatchInput && isJpeg) ||
          (willMatchInput && inputImageType == sharp::ImageType::JPEG)) {
          // Write JPEG to file
@@ -841,7 +872,9 @@ 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 +883,8 @@ 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 +910,14 @@ 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("format", "gif"));
+          baton->formatOut = "gif";
        } else if (baton->formatOut == "tiff" || (mightMatchInput && isTiff) ||
          (willMatchInput && inputImageType == sharp::ImageType::TIFF)) {
          // Write TIFF to file
@@ -887,7 +928,7 @@ class PipelineWorker : public Napi::AsyncWorker {
          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)
@@ -936,7 +977,7 @@ class PipelineWorker : public Napi::AsyncWorker {
            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"},
@@ -1302,7 +1343,7 @@ 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");
@@ -1320,6 +1361,18 @@ 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()));
+
+  // 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");
--- a/src/pipeline.h
+++ b/src/pipeline.h
@@ -143,7 +143,7 @@ struct PipelineBaton {
  VipsForeignTiffCompression tiffCompression;
  VipsForeignTiffPredictor tiffPredictor;
  bool tiffPyramid;
-  bool tiffSquash;
+  int tiffBitdepth;
  bool tiffTile;
  int tiffTileHeight;
  int tiffTileWidth;
@@ -167,6 +167,9 @@ struct PipelineBaton {
  bool removeAlpha;
  bool ensureAlpha;
  VipsInterpretation colourspace;
+  int pageHeight;
+  std::vector<int> delay;
+  int loop;
  int tileSize;
  int tileOverlap;
  VipsForeignDzContainer tileContainer;
@@ -251,7 +254,7 @@ 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),
@@ -273,6 +276,9 @@ 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),
--- a/src/stats.cc
+++ b/src/stats.cc
@@ -75,8 +75,29 @@ 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
+        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 +144,12 @@ 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() });
--- a/src/stats.h
+++ b/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)
    {}
 };

--- a/test/fixtures/animated-loop-3.webp
+++ b/test/fixtures/animated-loop-3.webp
--- a/test/fixtures/expected/conv-sobel-horizontal.jpg
+++ b/test/fixtures/expected/conv-sobel-horizontal.jpg
--- a/test/fixtures/expected/extract-alpha-2-channel.png
+++ b/test/fixtures/expected/extract-alpha-2-channel.png
--- a/test/fixtures/expected/extract.webp
+++ b/test/fixtures/expected/extract.webp
--- a/test/fixtures/expected/tint-cmyk.jpg
+++ b/test/fixtures/expected/tint-cmyk.jpg
--- a/test/fixtures/index.js
+++ b/test/fixtures/index.js
@@ -93,6 +93,8 @@ 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
  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
--- a/test/fixtures/rotating-squares.webp
+++ b/test/fixtures/rotating-squares.webp
--- a/test/unit/extractChannel.js
+++ b/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)
--- a/test/unit/failOnError.js
+++ b/test/unit/failOnError.js
@@ -19,11 +19,17 @@ describe('failOnError', function () {
      });
  });

-  it('handles truncated PNG', function (done) {
+  it('handles truncated PNG, emits warnings', function (done) {
+    let isWarningEmitted = false;
    sharp(fixtures.inputPngTruncated, { failOnError: false })
+      .on('warning', function (warning) {
+        assert.ok(warning.includes('not enough data') || warning.includes('end of stream'));
+        isWarningEmitted = true;
+      })
      .resize(320, 240)
      .toBuffer(function (err, data, info) {
        if (err) throw err;
+        assert.strictEqual(true, isWarningEmitted);
        assert.strictEqual('png', info.format);
        assert.strictEqual(320, info.width);
        assert.strictEqual(240, info.height);
@@ -56,7 +62,7 @@ describe('failOnError', function () {

  it('returns errors to callback for truncated PNG', function (done) {
    sharp(fixtures.inputPngTruncated).toBuffer(function (err, data, info) {
-      assert.ok(err.message.includes('vipspng: libpng read error'), err);
+      assert.ok(err.message.includes('read error'), err);
      assert.strictEqual(data, undefined);
      assert.strictEqual(info, undefined);
      done();
--- a/test/unit/gif.js
+++ b/test/unit/gif.js
@@ -42,7 +42,7 @@ describe('GIF input', () => {
      .then(({ data, info }) => {
        assert.strictEqual(true, data.length > 0);
        assert.strictEqual(data.length, info.size);
-        assert.strictEqual('png', info.format);
+        assert.strictEqual(sharp.format.magick.input.buffer ? 'gif' : 'png', info.format);
        assert.strictEqual(80, info.width);
        assert.strictEqual(80, info.height);
        assert.strictEqual(4, info.channels);
@@ -55,10 +55,47 @@ describe('GIF input', () => {
      .then(({ data, info }) => {
        assert.strictEqual(true, data.length > 0);
        assert.strictEqual(data.length, info.size);
-        assert.strictEqual('png', info.format);
+        assert.strictEqual(sharp.format.magick.input.buffer ? 'gif' : 'png', info.format);
        assert.strictEqual(80, info.width);
        assert.strictEqual(2400, info.height);
        assert.strictEqual(4, info.channels);
      })
  );
+
+  if (!sharp.format.magick.output.buffer) {
+    it('GIF output should fail due to missing ImageMagick', () => {
+      assert.throws(
+        () => {
+          sharp().gif();
+        },
+        /The gif operation requires libvips to have been installed with support for ImageMagick/
+      );
+    });
+  }
+
+  it('invalid pageHeight throws', () => {
+    assert.throws(() => {
+      sharp().gif({ pageHeight: 0 });
+    });
+  });
+
+  it('invalid loop throws', () => {
+    assert.throws(() => {
+      sharp().gif({ loop: -1 });
+    });
+
+    assert.throws(() => {
+      sharp().gif({ loop: 65536 });
+    });
+  });
+
+  it('invalid delay throws', () => {
+    assert.throws(() => {
+      sharp().gif({ delay: [-1] });
+    });
+
+    assert.throws(() => {
+      sharp().gif({ delay: [65536] });
+    });
+  });
 });
--- a/test/unit/io.js
+++ b/test/unit/io.js
@@ -302,7 +302,7 @@ describe('Input/output', function () {
  });

  it('Fail when input is empty Buffer', function (done) {
-    if (process.platform === 'freebsd') return this.skip(); // can be removed with libvips 8.10.0+
+    if (sharp.format.magick.input.buffer) return this.skip(); // can be removed with libvips 8.10.0+
    sharp(Buffer.alloc(0)).toBuffer().then(function () {
      assert(false);
      done();
@@ -470,7 +470,7 @@ describe('Input/output', function () {
        .toFile(fixtures.outputZoinks, function (err, info) {
          if (err) throw err;
          assert.strictEqual(true, info.size > 0);
-          assert.strictEqual('png', info.format);
+          assert.strictEqual(sharp.format.magick.input.buffer ? 'gif' : 'png', info.format);
          assert.strictEqual(320, info.width);
          assert.strictEqual(80, info.height);
          rimraf(fixtures.outputZoinks, done);
@@ -659,6 +659,19 @@ describe('Input/output', function () {
        sharp({ pages: '1' });
      }, /Expected integer between -1 and 100000 for pages but received 1 of type string/);
    });
+    it('Valid level property', function () {
+      sharp({ level: 1 });
+    });
+    it('Invalid level property (string) throws', function () {
+      assert.throws(function () {
+        sharp({ level: '1' });
+      }, /Expected integer between 0 and 256 for level but received 1 of type string/);
+    });
+    it('Invalid level property (negative) throws', function () {
+      assert.throws(function () {
+        sharp({ level: -1 });
+      }, /Expected integer between 0 and 256 for level but received -1 of type number/);
+    });
  });

  describe('create new image', function () {
--- a/test/unit/metadata.js
+++ b/test/unit/metadata.js
@@ -19,7 +19,7 @@ describe('Image metadata', function () {
      assert.strictEqual('srgb', metadata.space);
      assert.strictEqual(3, metadata.channels);
      assert.strictEqual('uchar', metadata.depth);
-      assert.strictEqual('undefined', typeof metadata.density);
+      assert.strictEqual(true, ['undefined', 'number'].includes(typeof metadata.density));
      assert.strictEqual('4:2:0', metadata.chromaSubsampling);
      assert.strictEqual(false, metadata.isProgressive);
      assert.strictEqual(false, metadata.hasProfile);
@@ -192,6 +192,54 @@ describe('Image metadata', function () {
    });
  });

+  it('Animated WebP', () =>
+    sharp(fixtures.inputWebPAnimated)
+      .metadata()
+      .then(({
+        format, width, height, space, channels, depth,
+        isProgressive, pages, pageHeight, loop, delay,
+        hasProfile, hasAlpha
+      }) => {
+        assert.strictEqual(format, 'webp');
+        assert.strictEqual(width, 80);
+        assert.strictEqual(height, 80);
+        assert.strictEqual(space, 'srgb');
+        assert.strictEqual(channels, 4);
+        assert.strictEqual(depth, 'uchar');
+        assert.strictEqual(isProgressive, false);
+        assert.strictEqual(pages, 9);
+        assert.strictEqual(pageHeight, 80);
+        assert.strictEqual(loop, 0);
+        assert.deepStrictEqual(delay, [120, 120, 90, 120, 120, 90, 120, 90, 30]);
+        assert.strictEqual(hasProfile, false);
+        assert.strictEqual(hasAlpha, true);
+      })
+  );
+
+  it('Animated WebP with limited looping', () =>
+    sharp(fixtures.inputWebPAnimatedLoop3)
+      .metadata()
+      .then(({
+        format, width, height, space, channels, depth,
+        isProgressive, pages, pageHeight, loop, delay,
+        hasProfile, hasAlpha
+      }) => {
+        assert.strictEqual(format, 'webp');
+        assert.strictEqual(width, 370);
+        assert.strictEqual(height, 285);
+        assert.strictEqual(space, 'srgb');
+        assert.strictEqual(channels, 4);
+        assert.strictEqual(depth, 'uchar');
+        assert.strictEqual(isProgressive, false);
+        assert.strictEqual(pages, 10);
+        assert.strictEqual(pageHeight, 285);
+        assert.strictEqual(loop, 3);
+        assert.deepStrictEqual(delay, [...Array(9).fill(3000), 15000]);
+        assert.strictEqual(hasProfile, false);
+        assert.strictEqual(hasAlpha, true);
+      })
+  );
+
  it('GIF via giflib', function (done) {
    sharp(fixtures.inputGif).metadata(function (err, metadata) {
      if (err) throw err;
@@ -311,7 +359,7 @@ describe('Image metadata', function () {
      assert.strictEqual('srgb', metadata.space);
      assert.strictEqual(3, metadata.channels);
      assert.strictEqual('uchar', metadata.depth);
-      assert.strictEqual('undefined', typeof metadata.density);
+      assert.strictEqual(true, ['undefined', 'number'].includes(typeof metadata.density));
      assert.strictEqual('4:2:0', metadata.chromaSubsampling);
      assert.strictEqual(false, metadata.isProgressive);
      assert.strictEqual(false, metadata.hasProfile);
@@ -343,7 +391,7 @@ describe('Image metadata', function () {
      assert.strictEqual('srgb', metadata.space);
      assert.strictEqual(3, metadata.channels);
      assert.strictEqual('uchar', metadata.depth);
-      assert.strictEqual('undefined', typeof metadata.density);
+      assert.strictEqual(true, ['undefined', 'number'].includes(typeof metadata.density));
      assert.strictEqual('4:2:0', metadata.chromaSubsampling);
      assert.strictEqual(false, metadata.isProgressive);
      assert.strictEqual(false, metadata.hasProfile);
@@ -381,7 +429,7 @@ describe('Image metadata', function () {
      assert.strictEqual('srgb', metadata.space);
      assert.strictEqual(3, metadata.channels);
      assert.strictEqual('uchar', metadata.depth);
-      assert.strictEqual('undefined', typeof metadata.density);
+      assert.strictEqual(true, ['undefined', 'number'].includes(typeof metadata.density));
      assert.strictEqual('4:2:0', metadata.chromaSubsampling);
      assert.strictEqual(false, metadata.isProgressive);
      assert.strictEqual(false, metadata.hasProfile);
@@ -405,7 +453,7 @@ describe('Image metadata', function () {
      assert.strictEqual('srgb', metadata.space);
      assert.strictEqual(3, metadata.channels);
      assert.strictEqual('uchar', metadata.depth);
-      assert.strictEqual('undefined', typeof metadata.density);
+      assert.strictEqual(true, ['undefined', 'number'].includes(typeof metadata.density));
      assert.strictEqual('4:2:0', metadata.chromaSubsampling);
      assert.strictEqual(false, metadata.isProgressive);
      assert.strictEqual(false, metadata.hasProfile);
--- a/test/unit/platform.js
+++ b/test/unit/platform.js
@@ -55,4 +55,12 @@ describe('Platform-detection', function () {
    assert.strictEqual('arm64v8', platform().split('-')[1]);
    delete process.env.npm_config_arch;
  });
+
+  it('Can ensure version ARMv7 if electron version is present', function () {
+    process.env.npm_config_arch = 'arm';
+    process.versions.electron = 'test';
+    assert.strictEqual('armv7', platform().split('-')[1]);
+    delete process.env.npm_config_arch;
+    delete process.versions.electron;
+  });
 });
--- a/test/unit/png.js
+++ b/test/unit/png.js
@@ -127,8 +127,8 @@ describe('PNG', function () {
  it('Valid PNG libimagequant quality value produces image of same size or smaller', function () {
    const inputPngBuffer = fs.readFileSync(fixtures.inputPng);
    return Promise.all([
-      sharp(inputPngBuffer).resize(10).png({ palette: true, quality: 80 }).toBuffer(),
-      sharp(inputPngBuffer).resize(10).png({ palette: true, quality: 100 }).toBuffer()
+      sharp(inputPngBuffer).resize(10).png({ quality: 80 }).toBuffer(),
+      sharp(inputPngBuffer).resize(10).png({ quality: 100 }).toBuffer()
    ]).then(function (data) {
      assert.strictEqual(true, data[0].length <= data[1].length);
    });
@@ -136,15 +136,15 @@ describe('PNG', function () {

  it('Invalid PNG libimagequant quality value throws error', function () {
    assert.throws(function () {
-      sharp().png({ palette: true, quality: 101 });
+      sharp().png({ quality: 101 });
    });
  });

  it('Valid PNG libimagequant colours value produces image of same size or smaller', function () {
    const inputPngBuffer = fs.readFileSync(fixtures.inputPng);
    return Promise.all([
-      sharp(inputPngBuffer).resize(10).png({ palette: true, colours: 100 }).toBuffer(),
-      sharp(inputPngBuffer).resize(10).png({ palette: true, colours: 200 }).toBuffer()
+      sharp(inputPngBuffer).resize(10).png({ colours: 100 }).toBuffer(),
+      sharp(inputPngBuffer).resize(10).png({ colours: 200 }).toBuffer()
    ]).then(function (data) {
      assert.strictEqual(true, data[0].length <= data[1].length);
    });
@@ -152,21 +152,21 @@ describe('PNG', function () {

  it('Invalid PNG libimagequant colours value throws error', function () {
    assert.throws(function () {
-      sharp().png({ palette: true, colours: -1 });
+      sharp().png({ colours: -1 });
    });
  });

  it('Invalid PNG libimagequant colors value throws error', function () {
    assert.throws(function () {
-      sharp().png({ palette: true, colors: 0.1 });
+      sharp().png({ colors: 0.1 });
    });
  });

  it('Valid PNG libimagequant dither value produces image of same size or smaller', function () {
    const inputPngBuffer = fs.readFileSync(fixtures.inputPng);
    return Promise.all([
-      sharp(inputPngBuffer).resize(10).png({ palette: true, dither: 0.1 }).toBuffer(),
-      sharp(inputPngBuffer).resize(10).png({ palette: true, dither: 0.9 }).toBuffer()
+      sharp(inputPngBuffer).resize(10).png({ dither: 0.1 }).toBuffer(),
+      sharp(inputPngBuffer).resize(10).png({ dither: 0.9 }).toBuffer()
    ]).then(function (data) {
      assert.strictEqual(true, data[0].length <= data[1].length);
    });
@@ -174,7 +174,7 @@ describe('PNG', function () {

  it('Invalid PNG libimagequant dither value throws error', function () {
    assert.throws(function () {
-      sharp().png({ palette: true, dither: 'fail' });
+      sharp().png({ dither: 'fail' });
    });
  });
 });
--- a/test/unit/stats.js
+++ b/test/unit/stats.js
@@ -25,6 +25,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.7883011147075762));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(40, r);
+      assert.strictEqual(40, g);
+      assert.strictEqual(40, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -84,6 +90,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3409031108021736));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 9.111356137722868));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(248, r);
+      assert.strictEqual(248, g);
+      assert.strictEqual(248, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -110,6 +122,12 @@ describe('Image Stats', function () {

      assert.strictEqual(false, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.06778064835816622));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 2.522916068931278));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(248, r);
+      assert.strictEqual(248, g);
+      assert.strictEqual(248, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -185,6 +203,12 @@ describe('Image Stats', function () {

      assert.strictEqual(false, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(72, r);
+      assert.strictEqual(104, g);
+      assert.strictEqual(72, b);

      // alpha channel
      assert.strictEqual(0, stats.channels[3].min);
@@ -212,6 +236,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 0.3851250782608986));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 10.312521863719589));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(248, r);
+      assert.strictEqual(248, g);
+      assert.strictEqual(248, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -239,6 +269,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.51758075132966));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 9.959951636662941));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(40, r);
+      assert.strictEqual(136, g);
+      assert.strictEqual(200, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -298,6 +334,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 6.087309412541799));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 2.9250574456255682));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(120, r);
+      assert.strictEqual(136, g);
+      assert.strictEqual(88, b);

      // red channel
      assert.strictEqual(35, stats.channels[0].min);
@@ -357,6 +399,12 @@ describe('Image Stats', function () {

      assert.strictEqual(false, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 1));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 15.870619016486861));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(8, r);
+      assert.strictEqual(8, g);
+      assert.strictEqual(8, b);

      // gray channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -403,6 +451,17 @@ describe('Image Stats', function () {
      })
  );

+  it('Dominant colour', () =>
+    sharp(fixtures.inputJpgBooleanTest)
+      .stats()
+      .then(({ dominant }) => {
+        const { r, g, b } = dominant;
+        assert.strictEqual(r, 8);
+        assert.strictEqual(g, 136);
+        assert.strictEqual(b, 248);
+      })
+  );
+
  it('Stream in, Callback out', function (done) {
    const readable = fs.createReadStream(fixtures.inputJpg);
    const pipeline = sharp().stats(function (err, stats) {
@@ -410,6 +469,12 @@ describe('Image Stats', function () {

      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(40, r);
+      assert.strictEqual(40, g);
+      assert.strictEqual(40, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -472,6 +537,12 @@ describe('Image Stats', function () {
    return pipeline.stats().then(function (stats) {
      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(40, r);
+      assert.strictEqual(40, g);
+      assert.strictEqual(40, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -529,6 +600,12 @@ describe('Image Stats', function () {
    return sharp(fixtures.inputJpg).stats().then(function (stats) {
      assert.strictEqual(true, stats.isOpaque);
      assert.strictEqual(true, isInAcceptableRange(stats.entropy, 7.319914765248541));
+      assert.strictEqual(true, isInAcceptableRange(stats.sharpness, 0.788301114707569));
+
+      const { r, g, b } = stats.dominant;
+      assert.strictEqual(40, r);
+      assert.strictEqual(40, g);
+      assert.strictEqual(40, b);

      // red channel
      assert.strictEqual(0, stats.channels[0].min);
@@ -582,6 +659,18 @@ describe('Image Stats', function () {
    });
  });

+  it('Blurred image has lower sharpness than original', () => {
+    const original = sharp(fixtures.inputJpg).stats();
+    const blurred = sharp(fixtures.inputJpg).blur().toBuffer().then(blur => sharp(blur).stats());
+
+    return Promise
+      .all([original, blurred])
+      .then(([original, blurred]) => {
+        assert.strictEqual(true, isInAcceptableRange(original.sharpness, 0.7883011147075476));
+        assert.strictEqual(true, isInAcceptableRange(blurred.sharpness, 0.4791559805997398));
+      });
+  });
+
  it('File input with corrupt header fails gracefully', function (done) {
    sharp(fixtures.inputJpgWithCorruptHeader)
      .stats(function (err) {
--- a/test/unit/tiff.js
+++ b/test/unit/tiff.js
@@ -116,7 +116,7 @@ describe('TIFF', function () {
    sharp(fixtures.inputTiff8BitDepth)
      .toColourspace('b-w') // can only squash 1 band uchar images
      .tiff({
-        squash: false,
+        bitdepth: 8,
        compression: 'none',
        predictor: 'none'
      })
@@ -133,7 +133,7 @@ describe('TIFF', function () {
    sharp(fixtures.inputTiff8BitDepth)
      .toColourspace('b-w') // can only squash 1 band uchar images
      .tiff({
-        squash: true,
+        bitdepth: 1,
        compression: 'none',
        predictor: 'none'
      })
@@ -145,10 +145,10 @@ describe('TIFF', function () {
      });
  });

-  it('Invalid TIFF squash value throws error', function () {
+  it('Invalid TIFF bitdepth value throws error', function () {
    assert.throws(function () {
-      sharp().tiff({ squash: 'true' });
-    });
+      sharp().tiff({ bitdepth: 3 });
+    }, /Error: Expected 1, 2, 4 or 8 for bitdepth but received 3 of type number/);
  });

  it('TIFF setting xres and yres on file', () =>
@@ -255,7 +255,7 @@ describe('TIFF', function () {
    sharp(fixtures.inputTiff)
      .toColourspace('b-w')
      .tiff({
-        squash: true,
+        bitdepth: 1,
        compression: 'ccittfax4'
      })
      .toFile(fixtures.outputTiff, (err, info) => {
--- a/test/unit/webp.js
+++ b/test/unit/webp.js
@@ -125,4 +125,63 @@ describe('WebP', function () {
      sharp().webp({ reductionEffort: -1 });
    });
  });
+
+  it('invalid pageHeight throws', () => {
+    assert.throws(() => {
+      sharp().webp({ pageHeight: 0 });
+    });
+  });
+
+  it('invalid loop throws', () => {
+    assert.throws(() => {
+      sharp().webp({ loop: -1 });
+    });
+
+    assert.throws(() => {
+      sharp().webp({ loop: 65536 });
+    });
+  });
+
+  it('invalid delay throws', () => {
+    assert.throws(() => {
+      sharp().webp({ delay: [-1] });
+    });
+
+    assert.throws(() => {
+      sharp().webp({ delay: [65536] });
+    });
+  });
+
+  it('should double the number of frames with default delay', async () => {
+    const original = await sharp(fixtures.inputWebPAnimated, { pages: -1 }).metadata();
+    const updated = await sharp(fixtures.inputWebPAnimated, { pages: -1 })
+      .webp({ pageHeight: original.pageHeight / 2 })
+      .toBuffer()
+      .then(data => sharp(data, { pages: -1 }).metadata());
+
+    assert.strictEqual(updated.pages, original.pages * 2);
+    assert.strictEqual(updated.pageHeight, original.pageHeight / 2);
+    assert.deepStrictEqual(updated.delay, [...original.delay, ...Array(9).fill(120)]);
+  });
+
+  it('should limit animation loop', async () => {
+    const updated = await sharp(fixtures.inputWebPAnimated, { pages: -1 })
+      .webp({ loop: 3 })
+      .toBuffer()
+      .then(data => sharp(data, { pages: -1 }).metadata());
+
+    assert.strictEqual(updated.loop, 3);
+  });
+
+  it('should change delay between frames', async () => {
+    const original = await sharp(fixtures.inputWebPAnimated, { pages: -1 }).metadata();
+
+    const expectedDelay = [...Array(original.pages).fill(40)];
+    const updated = await sharp(fixtures.inputWebPAnimated, { pages: -1 })
+      .webp({ delay: expectedDelay })
+      .toBuffer()
+      .then(data => sharp(data, { pages: -1 }).metadata());
+
+    assert.deepStrictEqual(updated.delay, expectedDelay);
+  });
 });
Author	SHA1	Message	Date
Lovell Fuller	ec2beb0039	Prerelease v0.26.0-alpha2	2020-08-18 14:01:19 +01:00
Lovell Fuller	cafb3e8bac	CI: ensure git tag is available inside prebuild containers	2020-08-18 14:00:14 +01:00
Lovell Fuller	e896d5e920	Prerelease v0.26.0-alpha1	2020-08-18 09:39:09 +01:00
Lovell Fuller	42d4228595	Replace prebuild-ci with simple wrapper around prebuild Drop Node.js 13, generate prebuilds for NAPI v3 only	2020-08-18 09:37:57 +01:00
Lovell Fuller	341ea3e4ea	Doc refresh and changelog entry for #2012	2020-08-17 16:20:10 +01:00
Tomáš Szabo	cb1baede87	Add support for animated WebP and GIF (via magick) (#2012 )	2020-08-17 14:48:38 +01:00
diegodev3	45653ca2e7	Ensure prebuilt binaries for ARM default to v7 when using Electron	2020-08-14 17:27:14 +01:00
Lovell Fuller	77c861b74b	Docs: ensure unreleased changes included in next release	2020-08-14 15:03:47 +01:00
Lovell Fuller	b586c2146f	Ensure node-addon-api include path is array context Need to revert to scalar context after node-addon-api v3.0.2	2020-08-14 12:39:58 +01:00
Lovell Fuller	4d42bed4f8	Upgrade to libvips v8.10.0-rc4	2020-08-14 10:33:37 +01:00
Lovell Fuller	ea54c119ab	Bump deps	2020-08-14 08:20:35 +01:00
Lovell Fuller	d95b124771	CI: ensure ARM64 Node.js 10 is installed	2020-08-11 10:09:21 +01:00
Lovell Fuller	61ccf09e6f	CI: ensure ARM64 Node.js 10 is installed from specific repo	2020-08-11 09:37:19 +01:00
Lovell Fuller	8da30f0b41	Map libvips file loader nicknames to sharp image types Use stable API rather than internal class names, reduces complexity	2020-08-09 09:39:27 +01:00
Lovell Fuller	90a57e7664	Upgrade to libvips 8.10.0-rc1	2020-07-17 14:46:53 +01:00
Lovell Fuller	c42de19d2a	Add most dominant colour to image stats #640	2020-07-15 21:57:37 +01:00
Lovell Fuller	dcc42f8514	Ensure electron-builder and electron-rebuild use N-API v3 prebuilds	2020-07-15 09:05:53 +01:00
Lovell Fuller	3150fad909	Upgrade to libvips 8.10.0-beta2	2020-07-14 19:45:25 +01:00
Lovell Fuller	ba17db3ab3	Switch to Brotli-compressed binaries, requires Node.js 10.16.0+	2020-06-29 20:53:58 +01:00
Kleis Auke Wolthuizen	7c1c48327e	Add support for statically-linked dependencies (lovell/sharp-libvips#39) (#2223 )	2020-06-28 21:17:15 +01:00
Lovell Fuller	85459e0ec6	macOS: remove linker flag ignored by clang	2020-06-27 11:55:10 +01:00
Lovell Fuller	13bdb68366	CI: pin Windows x86 Node.js 14 to 14.2.0 This is the least unstable version on the 14 release line. Windows x86 users should probably delay upgrading to Node.js 14.	2020-06-27 11:42:00 +01:00
Lovell Fuller	c91373fba3	Docs: add section about worker threads	2020-06-18 13:42:04 +01:00
Lovell Fuller	e8149f5295	Docs: fix markdown in changelog	2020-06-16 19:01:36 +01:00
Lovell Fuller	ab015ef90f	Avoid copy in metadata levels for loop	2020-06-16 18:59:20 +01:00
Lovell Fuller	fdfc89e577	Docs: add content security policy	2020-06-16 18:41:18 +01:00
Lovell Fuller	e647e1f7bd	Add changelog entry and credit for #2258 #2259	2020-06-16 18:39:58 +01:00
Jerome Vouillon	a05d735e31	Allow multi-page input via ImageMagic (#2259 )	2020-06-15 13:01:53 +01:00
Jerome Vouillon	4470048ba4	Add support for libvips ImageMagick v7 loaders (#2258 )	2020-06-15 12:59:20 +01:00
Lovell Fuller	0f58f956a7	Docs: fix external CSS	2020-06-12 17:07:05 +01:00
Lovell Fuller	20284757a6	Docs: fix binary mirror example	2020-06-12 17:06:46 +01:00
Lovell Fuller	df6efa0285	Release v0.25.4	2020-06-12 14:17:23 +01:00
Lovell Fuller	3c10e118e3	Docs: ensure presence of constructor description	2020-06-12 13:52:19 +01:00
Lovell Fuller	19980190f7	Emit 'warning' event for non-critical problems #2032	2020-06-12 13:46:12 +01:00
Lovell Fuller	8f5495a446	Add experimental sharpness calc to stats #2251	2020-06-12 11:25:57 +01:00
Mikhail Bodrov	9431029917	Simplify type checking of plainObject, buffer (#2252 )	2020-06-10 20:54:01 +01:00
Lovell Fuller	17ea70a102	Add named 'alpha' channel to extractChannel op #2138	2020-06-07 10:43:43 +01:00
Lovell Fuller	7f142bddb3	Add level constructor opt for multi-level input #2222	2020-06-06 16:10:56 +01:00
Lovell Fuller	98e0516ac1	Tests: latest libvips sets JPEG density	2020-06-06 16:09:52 +01:00
Mikhail Bodrov	7717516d1d	Simplify is helpers (#2244 )	2020-06-05 09:48:26 +01:00
Lovell Fuller	760550ca0d	Expose levels metadata for multi-level images #2222	2020-06-04 20:29:02 +01:00
Lovell Fuller	f8144dd89c	Bump dependencies	2020-06-04 20:17:15 +01:00
Lovell Fuller	ac4070cb49	Tests: skip empty Buffer test when *magick supported	2020-06-04 20:07:30 +01:00
Lovell Fuller	25b964e3df	Docs: changelog and credit update for #2226	2020-05-28 22:42:37 +01:00
Lovell Fuller	17ec6c72df	Docs: inline small external docute CSS/JS	2020-05-28 22:41:24 +01:00
Roman Malieiev	a7b1185602	Enable PNG palette when at least one of quality, colours, colors or dither is set (#2226 )	2020-05-28 22:21:33 +01:00
Lovell Fuller	c76ae06fd1	Attempt to reduce file size of binaries at link time	2020-05-22 19:47:19 +01:00
Lovell Fuller	b3dd54d550	Changelog and doc update for #2217	2020-05-22 16:48:27 +01:00
malice00	d248eadb06	Allow libvips binary location override with version appended (#2217 )	2020-05-22 16:07:32 +01:00
Lovell Fuller	507eef3053	Docs: reorder/highlight optional output properties	2020-05-19 18:55:33 +01:00
Lovell Fuller	fc2f672337	Improve error messaging when platform mismatch detected	2020-05-19 18:53:39 +01:00
Lovell Fuller	6f49be8f26	Docs: small perf boost by prefetching image DNS	2020-05-19 18:50:18 +01:00