Release v0.15.1

Switch param validation to use internal functions

.editorconfig

@@ -0,0 +1,12 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.gitignore

@@ -4,6 +4,8 @@ coverage
 test/bench/node_modules
 test/fixtures/output*
 test/leak/libvips.supp
-
-# Mac OS X
+lib
+include
+packaging/libvips*
+packaging/*.log
 .DS_Store

.jshintrc

@@ -2,9 +2,10 @@
   "strict": true,
   "node": true,
   "maxparams": 4,
-  "maxcomplexity": 13,
+  "maxcomplexity": 14,
   "globals": {
-    "before": true,
+    "beforeEach": true,
+    "afterEach": true,
     "describe": true,
     "it": true
   }

.npmignore

@@ -1,10 +1,16 @@
 build
 node_modules
 coverage
+.editorconfig
 .jshintignore
 .jshintrc
 .gitignore
 test
 .travis.yml
 appveyor.yml
+circle.yml
 mkdocs.yml
+lib
+include
+packaging
+preinstall.sh

.travis.yml

@@ -2,16 +2,21 @@ language: node_js
 node_js:
   - "0.10"
   - "0.12"
-  - "iojs-v2"
-  - "iojs-v3"
+  - "4"
+  - "6"
+os:
+  - linux
+  - osx
+sudo: false
 addons:
   apt:
     sources:
     - ubuntu-toolchain-r-test
     packages:
     - g++-4.8
+osx_image: xcode7.3
 before_install:
-  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 90
-  - curl -s https://raw.githubusercontent.com/lovell/sharp/master/preinstall.sh | sudo bash -
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export CXX=g++-4.8; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install homebrew/science/vips; fi
 after_success:
   - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js

CONTRIBUTING.md

@@ -6,16 +6,10 @@ Hello, thank you for your interest in helping!
 
 Please create a [new issue](https://github.com/lovell/sharp/issues/new) containing the steps to reproduce the problem.
 
+If you're having installation problems, please include the output of running `npm install --verbose sharp`.
+
 New bugs are assigned a `triage` label whilst under investigation.
 
-If you're having problems with `npm install sharp`, please include the output of the following commands, perhaps as a [gist](https://gist.github.com/):
-
-```sh
-vips -v
-pkg-config --print-provides vips
-npm install --verbose sharp
-```
-
 ## Submit a new feature request
 
 If a [similar request](https://github.com/lovell/sharp/labels/enhancement) exists, it's probably fastest to add a comment to it about your requirement.
@@ -47,9 +41,8 @@ Any change that modifies the existing public API should be added to the relevant
 
 | Release | WIP branch |
 | ------: | :--------- |
-| v0.11.0 | knife      |
-| v0.12.0 | look       |
-| v0.13.0 | mind       |
+| v0.16.0 | pencil     |
+| v0.17.0 | quill      |
 
 Please squash your changes into a single commit using a command like `git rebase -i upstream/<wip-branch>`.
 
@@ -85,6 +78,15 @@ Requires [Valgrind](http://valgrind.org/).
 npm run test-leak
 ```
 
+### Packaging tests
+
+Tests the installation on a number of Linux-based operating systems.
+Requires docker.
+
+```sh
+npm run test-packaging
+```
+
 ## Finally
 
 Please feel free to ask any questions via a [new issue](https://github.com/lovell/sharp/issues/new) or contact me by [e-mail](https://github.com/lovell/sharp/blob/master/package.json#L4).

README.md

@@ -1,16 +1,33 @@
 # sharp
 
 The typical use case for this high speed Node.js module
-is to convert large images of many formats to
+is to convert large images in common formats to
 smaller, web-friendly JPEG, PNG and WebP images of varying dimensions.
 
+Resizing an image is typically 4x-5x faster than using the
+quickest ImageMagick and GraphicsMagick settings.
+
+Colour spaces, embedded ICC profiles and alpha transparency channels are all handled correctly.
+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 Windows (x64), Linux and ARMv6+ systems do not require
+the installation of any external runtime dependencies.
+
+Use with OS X is as simple as running `brew install homebrew/science/vips`
+to install the libvips dependency.
+
 [![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.png?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
 
 ### Documentation
 
-Visit [sharp.dimens.io](http://sharp.dimens.io/) for
-complete installation instructions, API documentation,
-benchmark tests and a changelog.
+Visit [sharp.dimens.io](http://sharp.dimens.io/) for complete
+[installation instructions](http://sharp.dimens.io/page/install),
+[API documentation](http://sharp.dimens.io/page/api),
+[benchmark tests](http://sharp.dimens.io/page/performance) and
+[changelog](http://sharp.dimens.io/page/changelog).
 
 ### Contributing
 
@@ -19,7 +36,7 @@ covers reporting bugs, requesting features and submitting code changes.
 
 ### Licence
 
-Copyright 2013, 2014, 2015 Lovell Fuller and contributors.
+Copyright 2013, 2014, 2015, 2016 Lovell Fuller and contributors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

appveyor.yml

@@ -1,28 +1,15 @@
-os: Visual Studio 2015
+os: Previous Visual Studio 2015
 version: "{build}"
 build: off
 platform: x64
 environment:
-  VIPS_VERSION_MAJOR_MINOR: 8.0
-  VIPS_VERSION_PATCH: 2
   VIPS_WARNING: 0
   matrix:
-  - nodejs_version: "0.10"
-    nodejs_exec: "node"
   - nodejs_version: "0.12"
-    nodejs_exec: "node"
-  - nodejs_version: "2"
-    nodejs_exec: "iojs"
-  - nodejs_version: "3"
-    nodejs_exec: "iojs"
+  - nodejs_version: "4"
+  - nodejs_version: "6"
 install:
-  - ps: $env:VIPS_VERSION = "$env:VIPS_VERSION_MAJOR_MINOR.$env:VIPS_VERSION_PATCH"
-  - ps: Write-Output "Fetching http://www.vips.ecs.soton.ac.uk/supported/$env:VIPS_VERSION_MAJOR_MINOR/win32/vips-dev-$env:VIPS_VERSION.zip"
-  - ps: Start-FileDownload http://www.vips.ecs.soton.ac.uk/supported/$env:VIPS_VERSION_MAJOR_MINOR/win32/vips-dev-$env:VIPS_VERSION.zip -FileName c:\vips-dev-$env:VIPS_VERSION.zip
-  - ps: Invoke-Expression "& 7z -y x c:\vips-dev-$env:VIPS_VERSION.zip -oc:\ | FIND /V `"ing  `""
-  - ps: $env:VIPS_HOME = "c:\vips-dev-$env:VIPS_VERSION"
-  - ps: $env:PATH = "$env:VIPS_HOME\bin;$env:PATH"
-  - ps: Install-Product node $env:nodejs_version x86
-  - npm install --arch=ia32 --msvs_version=2013
+  - ps: Install-Product node $env:nodejs_version x64
+  - npm install
 test_script:
-  - npm run-script test-win32-%nodejs_exec%
+  - npm run-script test-win

binding.gyp

@@ -1,6 +1,89 @@
 {
   'targets': [{
+    'target_name': 'libvips-cpp',
+    'conditions': [
+      ['OS == "win"', {
+        # Build libvips C++ binding for Windows due to MSVC std library ABI changes
+        'type': 'shared_library',
+        'variables': {
+          'download_vips': '<!(node -e "require(\'./binding\').download_vips()")'
+        },
+        'defines': [
+          'VIPS_CPLUSPLUS_EXPORTS',
+          '_ALLOW_KEYWORD_MACROS'
+        ],
+        'sources': [
+          'src/libvips/cplusplus/VError.cpp',
+          'src/libvips/cplusplus/VInterpolate.cpp',
+          'src/libvips/cplusplus/VImage.cpp'
+        ],
+        'include_dirs': [
+          '<(module_root_dir)/include',
+          '<(module_root_dir)/include/glib-2.0',
+          '<(module_root_dir)/lib/glib-2.0/include'
+        ],
+        'libraries': [
+          '<(module_root_dir)/lib/libvips.lib',
+          '<(module_root_dir)/lib/libglib-2.0.lib',
+          '<(module_root_dir)/lib/libgobject-2.0.lib'
+        ],
+        'configurations': {
+          'Release': {
+            'msvs_settings': {
+              'VCCLCompilerTool': {
+                'ExceptionHandling': 1
+              }
+            },
+            'msvs_disabled_warnings': [
+              4275
+            ]
+          }
+        }
+      }, {
+        # Ignore this target for non-Windows
+        'type': 'none'
+      }]
+    ]
+  }, {
     'target_name': 'sharp',
+    'dependencies': [
+      'libvips-cpp'
+    ],
+    # Nested variables "pattern" borrowed from http://src.chromium.org/viewvc/chrome/trunk/src/build/common.gypi
+    'variables': {
+      'sharp_cxx11%': '0',
+      'variables': {
+        'variables': {
+          'conditions': [
+            ['OS != "win"', {
+              # Build the PKG_CONFIG_PATH environment variable with all possible combinations
+              'pkg_config_path': '<!(which brew >/dev/null 2>&1 && eval $(brew --env) && echo $PKG_CONFIG_LIBDIR || true):$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig'
+            }, {
+              'pkg_config_path': ''
+            }]
+          ],
+        },
+        'conditions': [
+          ['OS != "win"', {
+            # Which version, if any, of libvips is available globally via pkg-config?
+            'global_vips_version': '<!(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --modversion vips-cpp 2>/dev/null || true)'
+          }, {
+            'global_vips_version': ''
+          }]
+        ],
+        'pkg_config_path%': '<(pkg_config_path)'
+      },
+      'pkg_config_path%': '<(pkg_config_path)',
+      'runtime_link%': 'shared',
+      'conditions': [
+        ['OS != "win"', {
+          # Does the globally available version of libvips, if any, meet the minimum version requirement?
+          'use_global_vips': '<!(GLOBAL_VIPS_VERSION="<(global_vips_version)" node -e "require(\'./binding\').use_global_vips()")'
+        }, {
+          'use_global_vips': ''
+        }]
+      ]
+    },
     'sources': [
       'src/common.cc',
       'src/metadata.cc',
@@ -9,50 +92,82 @@
       'src/sharp.cc',
       'src/utilities.cc'
     ],
+    'defines': [
+      '_GLIBCXX_USE_CXX11_ABI=<(sharp_cxx11)',
+      '_ALLOW_KEYWORD_MACROS'
+    ],
+    'include_dirs': [
+      '<!(node -e "require(\'nan\')")'
+    ],
     'conditions': [
-        ['OS=="win"', {
-            'library_dirs': [
-                '$(VIPS_HOME)/lib'
-            ],
+      ['use_global_vips == "true"', {
+        # Use pkg-config for include and lib
+        'include_dirs': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --cflags-only-I vips-cpp vips glib-2.0 | sed s\/-I//g)'],
+        'conditions': [
+          ['runtime_link == "static"', {
+            'libraries': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --libs --static vips-cpp)']
+          }, {
+            'libraries': ['<!@(PKG_CONFIG_PATH="<(pkg_config_path)" pkg-config --libs vips-cpp)']
+          }]
+        ]
+      }, {
+        # Attempt to download pre-built libvips and install locally within node_modules
+        'include_dirs': [
+          '<(module_root_dir)/include',
+          '<(module_root_dir)/include/glib-2.0',
+          '<(module_root_dir)/lib/glib-2.0/include'
+        ],
+        'conditions': [
+          ['OS == "win"', {
             'libraries': [
-                'libvips.dll.a',
-                'glib-2.0.lib',
-                'gobject-2.0.lib',
-                'gthread-2.0.lib',
-                'gmodule-2.0.lib',
-                'liblcms2.dll.a',
-                'libxml2.lib',
-                'intl.lib',
-                'libjpeg.dll.a',
-                'libexif.dll.a',
-                'libpng.lib',
-                'libtiff.dll.a',
-                'libMagickWand-6.Q16.dll.a',
-                'libMagickCore-6.Q16.dll.a',
-                'pango-1.0.lib',
-                'pangoft2-1.0.lib',
-                'libgsf-1.dll.a',
-                'libopenslide.dll.a',
-                'libfftw3.dll.a'
-            ],
-            'include_dirs': [
-                '$(VIPS_HOME)/include',
-                '$(VIPS_HOME)/include/glib-2.0',
-                '$(VIPS_HOME)/lib/glib-2.0/include',
-                '<!(node -e "require(\'nan\')")'
+              '<(module_root_dir)/lib/libvips.lib',
+              '<(module_root_dir)/lib/libglib-2.0.lib',
+              '<(module_root_dir)/lib/libgobject-2.0.lib'
             ]
-        }, {
+          }],
+          ['OS == "linux"', {
             'variables': {
-                'PKG_CONFIG_PATH': '<!(which brew >/dev/null 2>&1 && eval $(brew --env) && echo $PKG_CONFIG_LIBDIR || true):$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig'
+              'download_vips': '<!(LDD_VERSION="<!(ldd --version 2>&1 || true)" node -e "require(\'./binding\').download_vips()")'
             },
             'libraries': [
-                '<!(PKG_CONFIG_PATH="<(PKG_CONFIG_PATH)" pkg-config --libs vips)'
-            ],
-            'include_dirs': [
-                '<!(PKG_CONFIG_PATH="<(PKG_CONFIG_PATH)" pkg-config --cflags vips glib-2.0)',
-                '<!(node -e "require(\'nan\')")'
+              '<(module_root_dir)/lib/libvips-cpp.so',
+              '<(module_root_dir)/lib/libvips.so',
+              '<(module_root_dir)/lib/libglib-2.0.so',
+              '<(module_root_dir)/lib/libgobject-2.0.so',
+              # Dependencies of dependencies, included for openSUSE support
+              '<(module_root_dir)/lib/libcairo.so',
+              '<(module_root_dir)/lib/libcroco-0.6.so',
+              '<(module_root_dir)/lib/libexif.so',
+              '<(module_root_dir)/lib/libffi.so',
+              '<(module_root_dir)/lib/libfontconfig.so',
+              '<(module_root_dir)/lib/libfreetype.so',
+              '<(module_root_dir)/lib/libgdk_pixbuf-2.0.so',
+              '<(module_root_dir)/lib/libgif.so',
+              '<(module_root_dir)/lib/libgio-2.0.so',
+              '<(module_root_dir)/lib/libgmodule-2.0.so',
+              '<(module_root_dir)/lib/libgsf-1.so',
+              '<(module_root_dir)/lib/libgthread-2.0.so',
+              '<(module_root_dir)/lib/libharfbuzz.so',
+              '<(module_root_dir)/lib/libjpeg.so',
+              '<(module_root_dir)/lib/liblcms2.so',
+              '<(module_root_dir)/lib/liborc-0.4.so',
+              '<(module_root_dir)/lib/libpango-1.0.so',
+              '<(module_root_dir)/lib/libpangocairo-1.0.so',
+              '<(module_root_dir)/lib/libpangoft2-1.0.so',
+              '<(module_root_dir)/lib/libpixman-1.so',
+              '<(module_root_dir)/lib/libpng.so',
+              '<(module_root_dir)/lib/libpng16.so',
+              '<(module_root_dir)/lib/librsvg-2.so',
+              '<(module_root_dir)/lib/libtiff.so',
+              '<(module_root_dir)/lib/libwebp.so',
+              '<(module_root_dir)/lib/libxml2.so',
+              '<(module_root_dir)/lib/libz.so',
+              # Ensure runtime linking is relative to sharp.node
+              '-Wl,-rpath=\'$${ORIGIN}/../../lib\''
             ]
-        }]
+          }]
+        ]
+      }]
     ],
     'cflags_cc': [
       '-std=c++0x',
@@ -61,28 +176,82 @@
       '-O3'
     ],
     'xcode_settings': {
+      'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',
+      'CLANG_CXX_LIBRARY': 'libc++',
+      'MACOSX_DEPLOYMENT_TARGET': '10.7',
+      'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
+      'GCC_ENABLE_CPP_RTTI': 'YES',
       'OTHER_CPLUSPLUSFLAGS': [
-        '-std=c++11',
-        '-stdlib=libc++',
         '-fexceptions',
         '-Wall',
         '-O3'
-      ],
-      'MACOSX_DEPLOYMENT_TARGET': '10.7'
-    },
-    'msvs_settings': {
-      'VCCLCompilerTool': {
-        'ExceptionHandling': 1 # /EHsc
-      }
+      ]
     },
     'configurations': {
       'Release': {
         'msvs_settings': {
           'VCCLCompilerTool': {
-            'ExceptionHandling': 1,
+            'ExceptionHandling': 1
           }
-        }
+        },
+        'msvs_disabled_warnings': [
+          4275
+        ]
       }
     },
+  }, {
+    'target_name': 'win_copy_dlls',
+    'type': 'none',
+    'dependencies': [
+      'sharp'
+    ],
+    'conditions': [
+      ['OS == "win"', {
+        # Windows lacks support for rpath
+        'copies': [{
+          'destination': '<(module_root_dir)/build/Release',
+          'files': [
+            '<(module_root_dir)/lib/GNU.Gettext.dll',
+            '<(module_root_dir)/lib/libasprintf-0.dll',
+            '<(module_root_dir)/lib/libcairo-2.dll',
+            '<(module_root_dir)/lib/libcairo-gobject-2.dll',
+            '<(module_root_dir)/lib/libcairo-script-interpreter-2.dll',
+            '<(module_root_dir)/lib/libcroco-0.6-3.dll',
+            '<(module_root_dir)/lib/libexif-12.dll',
+            '<(module_root_dir)/lib/libexpat-1.dll',
+            '<(module_root_dir)/lib/libffi-6.dll',
+            '<(module_root_dir)/lib/libfftw3-3.dll',
+            '<(module_root_dir)/lib/libfontconfig-1.dll',
+            '<(module_root_dir)/lib/libfreetype-6.dll',
+            '<(module_root_dir)/lib/libgcc_s_seh-1.dll',
+            '<(module_root_dir)/lib/libgdk_pixbuf-2.0-0.dll',
+            '<(module_root_dir)/lib/libgif-4.dll',
+            '<(module_root_dir)/lib/libgio-2.0-0.dll',
+            '<(module_root_dir)/lib/libglib-2.0-0.dll',
+            '<(module_root_dir)/lib/libgmodule-2.0-0.dll',
+            '<(module_root_dir)/lib/libgobject-2.0-0.dll',
+            '<(module_root_dir)/lib/libgsf-1-114.dll',
+            '<(module_root_dir)/lib/libgthread-2.0-0.dll',
+            '<(module_root_dir)/lib/libintl-8.dll',
+            '<(module_root_dir)/lib/libjpeg-62.dll',
+            '<(module_root_dir)/lib/liblcms2-2.dll',
+            '<(module_root_dir)/lib/libpango-1.0-0.dll',
+            '<(module_root_dir)/lib/libpangocairo-1.0-0.dll',
+            '<(module_root_dir)/lib/libpangowin32-1.0-0.dll',
+            '<(module_root_dir)/lib/libpixman-1-0.dll',
+            '<(module_root_dir)/lib/libpng16-16.dll',
+            '<(module_root_dir)/lib/libquadmath-0.dll',
+            '<(module_root_dir)/lib/librsvg-2-2.dll',
+            '<(module_root_dir)/lib/libssp-0.dll',
+            '<(module_root_dir)/lib/libstdc++-6.dll',
+            '<(module_root_dir)/lib/libtiff-5.dll',
+            '<(module_root_dir)/lib/libvips-42.dll',
+            '<(module_root_dir)/lib/libwebp-6.dll',
+            '<(module_root_dir)/lib/libxml2-2.dll',
+            '<(module_root_dir)/lib/zlib1.dll'
+          ]
+        }]
+      }]
+    ]
   }]
 }

binding.js

@@ -0,0 +1,134 @@
+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+var zlib = require('zlib');
+
+var semver = require('semver');
+var request = require('request');
+var tar = require('tar');
+
+var tmp = require('os').tmpdir();
+
+var distBaseUrl = 'https://dl.bintray.com/lovell/sharp/';
+
+// Use NPM-provided environment variable where available, falling back to require-based method for Electron
+var minimumLibvipsVersion = process.env.npm_package_config_libvips || require('./package.json').config.libvips;
+
+var vipsHeaderPath = path.join(__dirname, 'include', 'vips', 'vips.h');
+
+// -- Helpers
+
+// Does this file exist?
+var isFile = function(file) {
+  var exists = false;
+  try {
+    exists = fs.statSync(file).isFile();
+  } catch (err) {}
+  return exists;
+};
+
+var unpack = function(tarPath, done) {
+  var extractor = tar.Extract({
+    path: __dirname
+  });
+  extractor.on('error', error);
+  extractor.on('end', function() {
+    if (!isFile(vipsHeaderPath)) {
+      error('Could not unpack ' + tarPath);
+    }
+    if (typeof done === 'function') {
+      done();
+    }
+  });
+  fs.createReadStream(tarPath).on('error', error)
+    .pipe(zlib.Unzip())
+    .pipe(extractor);
+};
+
+// Error
+var error = function(msg) {
+  if (msg instanceof Error) {
+    msg = msg.message;
+  }
+  process.stderr.write('ERROR: ' + msg + '\n');
+  process.exit(1);
+};
+
+// -- Binary downloaders
+
+module.exports.download_vips = function() {
+  // Has vips been installed locally?
+  if (!isFile(vipsHeaderPath)) {
+    // Ensure Intel 64-bit or ARM
+    if (process.arch === 'ia32') {
+      error('Intel Architecture 32-bit systems require manual installation - please see http://sharp.dimens.io/en/stable/install/');
+    }
+    // Ensure glibc >= 2.15
+    var lddVersion = process.env.LDD_VERSION;
+    if (lddVersion) {
+      if (/(glibc|gnu libc)/i.test(lddVersion)) {
+        var glibcVersion = lddVersion ? lddVersion.split(/\n/)[0].split(' ').slice(-1)[0].trim() : '';
+        if (glibcVersion && semver.lt(glibcVersion + '.0', '2.13.0')) {
+          error('glibc version ' + glibcVersion + ' requires manual installation - please see http://sharp.dimens.io/en/stable/install/');
+        }
+      } else {
+        error(lddVersion.split(/\n/)[0] + ' requires manual installation - please see http://sharp.dimens.io/en/stable/install/');
+      }
+    }
+    // Arch/platform-specific .tar.gz
+    var platform = (process.arch === 'arm') ? 'arm' : process.platform.substr(0, 3);
+    var tarFilename = ['libvips', minimumLibvipsVersion, platform].join('-') + '.tar.gz';
+    var tarPath = path.join(__dirname, 'packaging', tarFilename);
+    if (isFile(tarPath)) {
+      unpack(tarPath);
+    } else {
+      // Download to per-process temporary file
+      tarPath = path.join(tmp, process.pid + '-' + tarFilename);
+      var tmpFile = fs.createWriteStream(tarPath).on('finish', function() {
+        unpack(tarPath, function() {
+          // Attempt to remove temporary file
+          try {
+            fs.unlinkSync(tarPath);
+          } catch (err) {}
+        });
+      });
+      var options = {
+        url: distBaseUrl + tarFilename
+      };
+      if (process.env.npm_config_https_proxy) {
+        // Use the NPM-configured HTTPS proxy
+        options.proxy = process.env.npm_config_https_proxy;
+      }
+      request(options).on('response', function(response) {
+        if (response.statusCode !== 200) {
+          error(distBaseUrl + tarFilename + ' status code ' + response.statusCode);
+        }
+      }).on('error', function(err) {
+        error('Download from ' + distBaseUrl + tarFilename + ' failed: ' + err.message);
+      }).pipe(tmpFile);
+    }
+  }
+};
+
+module.exports.use_global_vips = function() {
+  var useGlobalVips = false;
+  var globalVipsVersion = process.env.GLOBAL_VIPS_VERSION;
+  if (globalVipsVersion) {
+    useGlobalVips = semver.gte(
+      globalVipsVersion,
+      minimumLibvipsVersion
+    );
+  }
+  if (process.platform === 'darwin' && !useGlobalVips) {
+    if (globalVipsVersion) {
+      error(
+        'Found libvips ' + globalVipsVersion + ' but require ' + minimumLibvipsVersion +
+        '\nPlease upgrade libvips by running: brew update && brew upgrade'
+      );
+    } else {
+      error('Please install libvips by running: brew install homebrew/science/vips --with-webp --with-graphicsmagick');
+    }
+  }
+  process.stdout.write(useGlobalVips ? 'true' : 'false');
+};

circle.yml

@@ -0,0 +1,6 @@
+machine:
+  services:
+    - docker
+test:
+  override:
+    - ./packaging/test.sh

docs/api.md

@@ -6,22 +6,28 @@ var sharp = require('sharp');
 
 ### Input
 
-#### sharp([input])
+#### sharp([input], [options])
 
-Constructor to which further methods are chained. `input`, if present, can be one of:
+Constructor to which further methods are chained.
 
-* Buffer containing JPEG, PNG, WebP, GIF* or TIFF image data, or
-* String containing the filename of an image, with most major formats supported.
+`input`, if present, can be one of:
 
-The object returned implements the
+* Buffer containing JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data, or
+* String containing the 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 `input` is `null` or `undefined`.
+
+`options`, if present, is an Object with the following optional attributes:
+
+* `density` an integral number representing the DPI for vector images, defaulting to 72.
+* `raw` an Object containing `width`, `height` and `channels` when providing uncompressed data. See `raw()` for pixel ordering.
+
+The object returned by the constructor implements the
 [stream.Duplex](http://nodejs.org/api/stream.html#stream_class_stream_duplex) class.
 
-JPEG, PNG, WebP, GIF* or TIFF format image data
-can be streamed into the object when `input` is not provided.
-
 JPEG, PNG or WebP format image data can be streamed out from this object.
-
-\* libvips 8.0.0+ is required for Buffer/Stream input of GIF and other `magick` formats.
+When using Stream based output, derived attributes are available from the `info` event.
 
 ```javascript
 sharp('input.jpg')
@@ -32,17 +38,31 @@ sharp('input.jpg')
   });
 ```
 
+```javascript
+// Read image data from readableStream,
+// resize to 300 pixels wide,
+// emit an 'info' event with calculated dimensions
+// and finally write image data to writableStream
+var transformer = sharp()
+  .resize(300)
+  .on('info', function(info) {
+    console.log('Image height is ' + info.height);
+  });
+readableStream.pipe(transformer).pipe(writableStream);
+```
+
 #### metadata([callback])
 
 Fast access to image metadata without decoding any compressed image data.
 
 `callback`, if present, gets the arguments `(err, metadata)` where `metadata` has the attributes:
 
-* `format`: Name of decoder to be used to decompress image data e.g. `jpeg`, `png`, `webp` (for file-based input additionally `tiff`, `magick` and `openslide`)
+* `format`: Name of decoder used to decompress image data e.g. `jpeg`, `png`, `webp`, `gif`, `svg`
 * `width`: Number of pixels wide
 * `height`: Number of pixels high
 * `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `scrgb`, `cmyk`, `lab`, `xyz`, `b-w` [...](https://github.com/jcupitt/libvips/blob/master/libvips/iofuncs/enumtypes.c#L522)
 * `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
+* `density`: Number of pixels per inch (DPI), if present
 * `hasProfile`: Boolean indicating the presence of an embedded ICC profile
 * `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
 * `orientation`: Number value of the EXIF Orientation header, if present
@@ -78,7 +98,7 @@ to share a single input Stream.
 ```javascript
 var pipeline = sharp().rotate();
 pipeline.clone().resize(800, 600).pipe(firstWritableStream);
-pipeline.clone().extract(20, 20, 100, 100).pipe(secondWritableStream);
+pipeline.clone().extract({ left: 20, top: 20, width: 100, height: 100 }).pipe(secondWritableStream);
 readableStream.pipe(pipeline);
 // firstWritableStream receives auto-rotated, resized readableStream
 // secondWritableStream receives auto-rotated, extracted region of readableStream
@@ -93,11 +113,12 @@ This will reduce memory usage and can improve performance on some systems.
 
 Do not process input images where the number of pixels (width * height) exceeds this limit.
 
-`pixels` is the integral Number of pixels, with a value between 1 and the default 268402689 (0x3FFF * 0x3FFF).
+`pixels` is either an integral Number of pixels, with a value between 1 and the default 268402689 (0x3FFF * 0x3FFF) or
+ a boolean. `false` will disable checking while `true` will revert to the default limit.
 
 ### Resizing
 
-#### resize([width], [height])
+#### resize([width], [height], [options])
 
 Scale output to `width` x `height`. By default, the resized image is cropped to the exact size specified.
 
@@ -105,22 +126,73 @@ Scale output to `width` x `height`. By default, the resized image is cropped to
 
 `height` is the integral Number of pixels high the resultant image should be, between 1 and 16383. Use `null` or `undefined` to auto-scale the height to match the width.
 
-#### crop([gravity])
+`options` is an optional Object. If present, it can contain one or more of:
+
+* `options.kernel`, the kernel to use for image reduction, defaulting to `lanczos3`.
+* `options.interpolator`, the interpolator to use for image enlargement, defaulting to `bicubic`.
+
+Possible kernels are:
+
+* `cubic`: Use a [Catmull-Rom spline](https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline).
+* `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
+* `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
+
+Possible interpolators are:
+
+* `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation).
+* `bilinear`: Use [bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation), faster than bicubic but with less smooth results.
+* `vertexSplitQuadraticBasisSpline`: Use the smoother [VSQBS interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/vsqbs.cpp#L48) to prevent "staircasing" when enlarging.
+* `bicubic`: Use [bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation) (the default).
+* `locallyBoundedBicubic`: Use [LBB interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/lbb.cpp#L100), which prevents some "[acutance](http://en.wikipedia.org/wiki/Acutance)" but typically reduces performance by a factor of 2.
+* `nohalo`: Use [Nohalo interpolation](http://eprints.soton.ac.uk/268086/), which prevents acutance but typically reduces performance by a factor of 3.
+
+```javascript
+sharp(inputBuffer)
+  .resize(200, 300, {
+    kernel: sharp.kernel.lanczos2,
+    interpolator: sharp.interpolator.nohalo
+  })
+  .background('white')
+  .embed()
+  .toFile('output.tiff')
+  .then(function() {
+    // output.tiff is a 200 pixels wide and 300 pixels high image
+    // containing a lanczos2/nohalo scaled version, embedded on a white canvas,
+    // of the image data in inputBuffer
+  });
+```
+
+#### crop([option])
 
 Crop the resized image to the exact size specified, the default behaviour.
 
-`gravity`, if present, is a String or an attribute of the `sharp.gravity` Object e.g. `sharp.gravity.north`.
+`option`, if present, is an attribute of:
 
-Possible values are `north`, `east`, `south`, `west`, `center` and `centre`. The default gravity is `center`/`centre`.
+* `sharp.gravity` e.g. `sharp.gravity.north`, to crop to an edge or corner, or
+* `sharp.strategy` e.g. `sharp.strategy.entropy`, to crop dynamically.
+
+Possible attributes of `sharp.gravity` are
+`north`, `northeast`, `east`, `southeast`, `south`,
+`southwest`, `west`, `northwest`, `center` and `centre`.
+
+Possible attributes of the experimental `sharp.strategy` are:
+
+* `entropy`: resize so one dimension is at its target size
+then repeatedly remove pixels from the edge with the lowest
+[Shannon entropy](https://en.wikipedia.org/wiki/Entropy_%28information_theory%29)
+until it too reaches the target size.
+
+The default crop option is a `center`/`centre` gravity.
 
 ```javascript
 var transformer = sharp()
-  .resize(300, 200)
-  .crop(sharp.gravity.north)
+  .resize(200, 200)
+  .crop(sharp.strategy.entropy)
   .on('error', function(err) {
     console.log(err);
   });
-// Read image data from readableStream, resize and write image data to writableStream
+// Read image data from readableStream
+// Write 200px square auto-cropped image data to writableStream
 readableStream.pipe(transformer).pipe(writableStream);
 ```
 
@@ -196,40 +268,13 @@ if its width or height exceeds the geometry specification*".
 
 Ignoring the aspect ratio of the input, stretch the image to the exact `width` and/or `height` provided via `resize`.
 
-#### interpolateWith(interpolator)
-
-Use the given interpolator for image resizing, where `interpolator` is an attribute of the `sharp.interpolator` Object e.g. `sharp.interpolator.bicubic`.
-
-Possible interpolators, in order of performance, are:
-
-* `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation), suitable for image enlargement only.
-* `bilinear`: Use [bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation), the default and fastest image reduction interpolation.
-* `bicubic`: Use [bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation), which typically reduces performance by 5%.
-* `vertexSplitQuadraticBasisSpline`: Use [VSQBS interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/vsqbs.cpp#L48), which prevents "staircasing" and typically reduces performance by 5%.
-* `locallyBoundedBicubic`: Use [LBB interpolation](https://github.com/jcupitt/libvips/blob/master/libvips/resample/lbb.cpp#L100), which prevents some "[acutance](http://en.wikipedia.org/wiki/Acutance)" and typically reduces performance by a factor of 2.
-* `nohalo`: Use [Nohalo interpolation](http://eprints.soton.ac.uk/268086/), which prevents acutance and typically reduces performance by a factor of 3.
-
-```javascript
-sharp(inputBuffer)
-  .resize(200, 300)
-  .interpolateWith(sharp.interpolator.nohalo)
-  .background('white')
-  .embed()
-  .toFile('output.tiff')
-  .then(function() {
-    // output.tiff is a 200 pixels wide and 300 pixels high image
-    // containing a nohalo scaled version, embedded on a white canvas,
-    // of the image data in inputBuffer
-  });
-```
-
 ### Operations
 
-#### extract(top, left, width, height)
+#### extract({ left: left, top: top, width: width, height: height })
 
 Extract a region of the image. Can be used with or without a `resize` operation.
 
-`top` and `left` are the offset, in pixels, from the top-left corner.
+`left` and `top` are the offset, in pixels, from the top-left corner.
 
 `width` and `height` are the dimensions of the extracted image.
 
@@ -237,7 +282,7 @@ Use `extract` before `resize` for pre-resize extraction. Use `extract` after `re
 
 ```javascript
 sharp(input)
-  .extract(top, left, width, height)
+  .extract({ left: left, top: top, width: width, height: height })
   .toFile(output, function(err) {
     // Extract a region of the input image, saving in the same format.
   });
@@ -245,17 +290,23 @@ sharp(input)
 
 ```javascript
 sharp(input)
-  .extract(topOffsetPre, leftOffsetPre, widthPre, heightPre)
+  .extract({ left: leftOffsetPre, top: topOffsetPre, width: widthPre, height: heightPre })
   .resize(width, height)
-  .extract(topOffsetPost, leftOffsetPost, widthPost, heightPost)
+  .extract({ left: leftOffsetPost, top: topOffsetPost, width: widthPost, height: heightPost })
   .toFile(output, function(err) {
     // Extract a region, resize, then extract from the resized image
   });
 ```
 
+#### trim([tolerance])
+
+Trim "boring" pixels from all edges that contain values within a percentage similarity of the top-left pixel.
+
+* `tolerance`, if present, is an integral Number between 1 and 99 representing the percentage similarity, defaulting to 10.
+
 #### background(rgba)
 
-Set the background for the `embed` and `flatten` operations.
+Set the background for the `embed`, `flatten` and `extend` operations.
 
 `rgba` is parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
 
@@ -267,6 +318,29 @@ The default background is `{r: 0, g: 0, b: 0, a: 1}`, black without transparency
 
 Merge alpha transparency channel, if any, with `background`.
 
+#### extend(extension)
+
+Extends/pads the edges of the image with `background`, where `extension` is one of:
+
+* a Number representing the pixel count to add to each edge, or
+* an Object containing `top`, `left`, `bottom` and `right` attributes, each a Number of pixels to add to that edge.
+
+This operation will always occur after resizing and extraction, if any.
+
+```javascript
+// Resize to 140 pixels wide, then add 10 transparent pixels
+// to the top, left and right edges and 20 to the bottom edge
+sharp(input)
+  .resize(140)
+  .background({r: 0, g: 0, b: 0, a: 0})
+  .extend({top: 10, bottom: 20, left: 10, right: 10})
+  ...
+```
+
+#### negate()
+
+Produces the "negative" of the image.  White => Black, Black => White, Blue => Yellow, etc.
+
 #### rotate([angle])
 
 Rotate the output image by either an explicit angle or auto-orient based on the EXIF `Orientation` tag.
@@ -311,23 +385,55 @@ When used without parameters, performs a fast, mild blur of the output image. Th
 
 When a `sigma` is provided, performs a slower, more accurate Gaussian blur. This typically reduces performance by 25%.
 
-* `sigma`, if present, is a Number between 0.3 and 1000 representing the approximate blur radius in pixels.
+* `sigma`, if present, is a Number between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
 
-#### sharpen([radius], [flat], [jagged])
+#### convolve(kernel)
+
+Convolve the image with the specified `kernel`, an Object with the following attributes:
+
+* `width` is an integral Number representing the width of the kernel in pixels.
+* `height` is an integral Number representing the width of the kernel in pixels.
+* `kernel` is an Array of length `width*height` containing the kernel values.
+* `scale`, if present, is a Number representing the scale of the kernel in pixels, defaulting to the sum of the kernel's values.
+* `offset`, if present, is a Number representing the offset of the kernel in pixels, defaulting to 0.
+
+```javascript
+sharp(input)
+  .convolve({
+    width: 3,
+    height: 3,
+    kernel: [-1, 0, 1, -2, 0, 2, -1, 0, 1]
+  })
+  .raw()
+  .toBuffer(function(err, data, info) {
+    // data contains the raw pixel data representing the convolution
+    // of the input image with the horizontal Sobel operator
+  });
+```
+
+#### sharpen([sigma], [flat], [jagged])
 
 When used without parameters, performs a fast, mild sharpen of the output image. This typically reduces performance by 10%.
 
-When a `radius` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space. Separate control over the level of sharpening in "flat" and "jagged" areas is available. This typically reduces performance by 50%.
+When a `sigma` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space. Separate control over the level of sharpening in "flat" and "jagged" areas is available. This typically reduces performance by 50%.
 
-* `radius`, if present, is an integral Number representing the sharpen mask radius in pixels.
+* `sigma`, if present, is a Number representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
 * `flat`, if present, is a Number representing the level of sharpening to apply to "flat" areas, defaulting to a value of 1.0.
 * `jagged`, if present, is a Number representing the level of sharpening to apply to "jagged" areas, defaulting to a value of 2.0.
 
+#### threshold([threshold], [options])
+
+Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
+By default, the image will be converted to single channel greyscale before thresholding.
+
+* `threshold`, if present, is a Number between 0 and 255, representing the level at which the threshold will be applied. The default threshold is 128.
+* `options`, if present, is an Object containing a Boolean `greyscale` (or `grayscale`). When `false` each channel will have the threshold applied independently.
+
 #### gamma([gamma])
 
 Apply a gamma correction by reducing the encoding (darken) pre-resize at a factor of `1/gamma` then increasing the encoding (brighten) post-resize at a factor of `gamma`.
 
-`gamma`, if present, is a Number betweem 1 and 3. The default value is `2.2`, a suitable approximation for sRGB images.
+`gamma`, if present, is a Number between 1 and 3. The default value is `2.2`, a suitable approximation for sRGB images.
 
 This can improve the perceived brightness of a resized image in non-linear colour spaces.
 
@@ -345,13 +451,24 @@ The output image will still be web-friendly sRGB and contain three (identical) c
 
 Enhance output image contrast by stretching its luminance to cover the full dynamic range. This typically reduces performance by 30%.
 
-#### overlayWith(filename)
+#### overlayWith(image, [options])
 
-_Experimental_
+Overlay (composite) a image containing an alpha channel over the processed (resized, extracted etc.) image.
 
-Alpha composite `filename` over the processed (resized, extracted) image. The dimensions of the two images must match.
+`image` is one of the following, and must be the same size or smaller than the processed image:
 
-* `filename` is a String containing the filename of an image with an alpha channel.
+* Buffer containing PNG, WebP, GIF or SVG image data, or
+* String containing the path to an image file, with most major transparency formats supported.
+
+`options`, if present, is an Object with the following optional attributes:
+
+* `gravity` is a String or an attribute of the `sharp.gravity` Object e.g. `sharp.gravity.north` at which to place the overlay, defaulting to `center`/`centre`.
+* `top` is an integral Number representing the pixel offset from the top edge.
+* `left` is an integral Number representing the pixel offset from the left edge.
+* `tile` is a Boolean, defaulting to `false`. When set to `true` repeats the overlay image across the entire image with the given `gravity`.
+* `cutout` is a Boolean, defaulting to `false`. When set to `true` applies only the alpha channel of the overlay image to the image to be overlaid, giving the appearance of one image being cut out of another.
+
+If both `top` and `left` are provided, they take precedence over `gravity`.
 
 ```javascript
 sharp('input.png')
@@ -359,7 +476,7 @@ sharp('input.png')
   .resize(300)
   .flatten()
   .background('#ff6600')
-  .overlayWith('overlay.png')
+  .overlayWith('overlay.png', { gravity: sharp.gravity.southeast } )
   .sharpen()
   .withMetadata()
   .quality(90)
@@ -367,33 +484,83 @@ sharp('input.png')
   .toBuffer()
   .then(function(outputBuffer) {
     // outputBuffer contains upside down, 300px wide, alpha channel flattened
-    // onto orange background, composited with overlay.png, sharpened,
-    // with metadata, 90% quality WebP image data. Phew!
+    // onto orange background, composited with overlay.png with SE gravity,
+    // sharpened, with metadata, 90% quality WebP image data. Phew!
   });
 ```
 
+#### extractChannel(channel)
+
+Extract a single channel from a multi-channel image.
+
+* `channel` is a zero-indexed integral Number representing the band number to extract. `red`, `green` or `blue` are also accepted as an alternative to `0`, `1` or `2` respectively.
+
+```javascript
+sharp(input)
+  .extractChannel('green')
+  .toFile('input_green.jpg', function(err, info) {
+    // info.channels === 1
+    // input_green.jpg contains the green channel of the input image
+   });
+```
+
+#### bandbool(operation)
+
+Perform a bitwise boolean operation on all input image channels (bands) to produce a single channel output image.
+
+`operation` is a string containing the name of the bitwise operator to be appled to image channels, which can be one of:
+
+* `and` performs a bitwise and operation, like the c-operator `&`.
+* `or` performs a bitwise or operation, like the c-operator `|`.
+* `eor` performs a bitwise exclusive or operation, like the c-operator `^`.
+
+```javascript
+sharp('input.png')
+  .bandbool(sharp.bool.and)
+  .toFile('output.png')
+```
+
+In the above example if `input.png` is a 3 channel RGB image, `output.png` will be a 1 channel grayscale image where each pixel `P = R & G & B`.
+For example, if `I(1,1) = [247, 170, 14] = [0b11110111, 0b10101010, 0b00001111]` then `O(1,1) = 0b11110111 & 0b10101010 & 0b00001111 = 0b00000010 = 2`.
+
+#### boolean(image, operation)
+
+Perform a bitwise boolean operation with `image`, where `image` is one of the following:
+
+* Buffer containing PNG, WebP, GIF or SVG image data, or
+* String containing the path to an image file
+
+This operation creates an output image where each pixel is the result of the selected bitwise boolean `operation` between the corresponding pixels of the input images.
+The boolean operation can be one of the following:
+
+* `and` performs a bitwise and operation, like the c-operator `&`.
+* `or` performs a bitwise or operation, like the c-operator `|`.
+* `eor` performs a bitwise exclusive or operation, like the c-operator `^`.
+
 ### Output
 
-#### toFile(filename, [callback])
+#### toFile(path, [callback])
 
-`filename` is a String containing the filename to write the image data to. The format is inferred from the extension, with JPEG, PNG, WebP, TIFF and DZI supported.
+`path` is a String containing the path to write the image data to.
+
+If an explicit output format is not selected, it will be inferred from the extension, with JPEG, PNG, WebP, TIFF, DZI, and VIPS V format supported. Note that RAW format is only supported for buffer output.
 
 `callback`, if present, is called with two arguments `(err, info)` where:
 
 * `err` contains an error message, if any.
-* `info` contains the output image `format`, `size` (bytes), `width` and `height`.
+* `info` contains the output image `format`, `size` (bytes), `width`, `height` and `channels`.
 
 A Promises/A+ promise is returned when `callback` is not provided.
 
 #### toBuffer([callback])
 
-Write image data to a Buffer, the format of which will match the input image by default. JPEG, PNG and WebP are supported.
+Write image data to a Buffer, the format of which will match the input image by default. JPEG, PNG, WebP, and RAW are supported.
 
 `callback`, if present, gets three arguments `(err, buffer, info)` where:
 
 * `err` is an error message, if any.
 * `buffer` is the output image data.
-* `info` contains the output image `format`, `size` (bytes), `width` and `height`.
+* `info` contains the output image `format`, `size` (bytes), `width`, `height` and `channels`.
 
 A Promises/A+ promise is returned when `callback` is not provided.
 
@@ -411,8 +578,6 @@ Use WebP format for the output image.
 
 #### raw()
 
-_Requires libvips 7.42.0+_
-
 Provide raw, uncompressed uint8 (unsigned char) image data for Buffer and Stream based output.
 
 The number of channels depends on the input image and selected options.
@@ -446,23 +611,33 @@ This will also convert to and add the latest web-friendly v2 sRGB ICC profile.
 The optional `metadata` parameter, if present, is an Object with the attributes to update.
 New attributes cannot be inserted, only existing attributes updated.
 
-* `orientation` is an integral Number between 0 and 7, used to update the value of the EXIF `Orientation` tag.
+* `orientation` is an integral Number between 1 and 8, used to update the value of the EXIF `Orientation` tag.
 This has no effect if the input image does not have an EXIF `Orientation` tag.
 
 The default behaviour, when `withMetadata` is not used, is to strip all metadata and convert to the device-independent sRGB colour space.
 
-#### tile([size], [overlap])
+#### tile(options)
 
-The size and overlap, in pixels, of square Deep Zoom image pyramid tiles.
+The size, overlap, container and directory layout to use when generating square Deep Zoom image pyramid tiles.
+
+`options` is an Object with one or more of the following attributes:
 
 * `size` is an integral Number between 1 and 8192. The default value is 256 pixels.
 * `overlap` is an integral Number between 0 and 8192. The default value is 0 pixels.
+* `container` is a String, with value `fs` or `zip`. The default value is `fs`.
+* `layout` is a String, with value `dz`, `zoomify` or `google`. The default value is `dz`.
+
+You can also use the file extension `.zip` or `.szi` to write to a compressed archive file format.
 
 ```javascript
-sharp('input.tiff').tile(256).toFile('output.dzi', function(err, info) {
-  // The output.dzi file is the XML format Deep Zoom definition
-  // The output_files directory contains 256x256 pixel tiles grouped by zoom level
-});
+sharp('input.tiff')
+  .tile({
+    size: 512
+  })
+  .toFile('output.dzi', function(err, info) {
+    // output.dzi is the Deep Zoom XML definition
+    // output_files contains 512x512 tiles grouped by zoom level
+  });
 ```
 
 #### withoutChromaSubsampling()
@@ -482,13 +657,11 @@ An advanced setting for the _zlib_ compression level of the lossless PNG output
 
 #### withoutAdaptiveFiltering()
 
-_Requires libvips 7.42.0+_
-
 An advanced setting to disable adaptive row filtering for the lossless PNG output format.
 
 #### trellisQuantisation() / trellisQuantization()
 
-_Requires libvips 8.0.0+ compiled against mozjpeg 3.0+_
+_Requires libvips to have been compiled with mozjpeg support_
 
 An advanced setting to apply the use of
 [trellis quantisation](http://en.wikipedia.org/wiki/Trellis_quantization) with JPEG output.
@@ -496,7 +669,7 @@ Reduces file size and slightly increases relative quality at the cost of increas
 
 #### overshootDeringing()
 
-_Requires libvips 8.0.0+ compiled against mozjpeg 3.0+_
+_Requires libvips to have been compiled with mozjpeg support_
 
 An advanced setting to reduce the effects of
 [ringing](http://en.wikipedia.org/wiki/Ringing_%28signal%29) in JPEG output,
@@ -504,7 +677,7 @@ in particular where black text appears on a white background (or vice versa).
 
 #### optimiseScans() / optimizeScans()
 
-_Requires libvips 8.0.0+ compiled against mozjpeg 3.0+_
+_Requires libvips to have been compiled with mozjpeg support_
 
 An advanced setting for progressive (interlace) JPEG output.
 Calculates which spectrum of DCT coefficients uses the fewest bits.
@@ -533,9 +706,6 @@ for example:
   tiff: { id: 'tiff',
     input: { file: true, buffer: true, stream: true },
     output: { file: true, buffer: false, stream: false } },
-  magick: { id: 'magick',
-    input: { file: true, buffer: true, stream: true },
-    output: { file: false, buffer: false, stream: false } },
   raw: { id: 'raw',
     input: { file: false, buffer: false, stream: false },
     output: { file: false, buffer: true, stream: true } } }
@@ -554,21 +724,38 @@ sharp.queue.on('change', function(queueLength) {
 });
 ```
 
+#### versions
+
+An Object containing the version numbers of libvips and, on Linux, its dependencies.
+
+```javascript
+console.log(sharp.versions);
+```
+
 ### Utilities
 
-#### sharp.cache([memory], [items])
+#### sharp.cache([options])
 
-If `memory` or `items` are provided, set the limits of _libvips'_ operation cache.
+If `options` is provided, sets the limits of _libvips'_ operation cache.
 
-* `memory` is the maximum memory in MB to use for this cache, with a default value of 100
-* `items` is the maximum number of operations to cache, with a default value of 500
+* `options.memory` is the maximum memory in MB to use for this cache, with a default value of 50
+* `options.files` is the maximum number of files to hold open, with a default value of 20
+* `options.items` is the maximum number of operations to cache, with a default value of 100
+
+`options` can also be a boolean, where `true` enables the default cache settings and `false` disables all caching.
+
+Existing entries in the cache will be trimmed after any change in limits.
 
 This method always returns cache statistics, useful for determining how much working memory is required for a particular task.
 
 ```javascript
-var stats = sharp.cache(); // { current: 75, high: 99, memory: 100, items: 500 }
-sharp.cache(200); // { current: 75, high: 99, memory: 200, items: 500 }
-sharp.cache(50, 200); // { current: 49, high: 99, memory: 50, items: 200}
+var stats = sharp.cache();
+```
+
+```javascript
+sharp.cache( { items: 200 } );
+sharp.cache( { files: 0 } );
+sharp.cache(false);
 ```
 
 #### sharp.concurrency([threads])
@@ -595,3 +782,31 @@ Provides access to internal task counters.
 ```javascript
 var counters = sharp.counters(); // { queue: 2, process: 4 }
 ```
+
+#### sharp.simd([enable])
+
+_Requires libvips to have been compiled with liborc support_
+
+Improves the performance of `resize`, `blur` and `sharpen` operations
+by taking advantage of the SIMD vector unit of the CPU, e.g. Intel SSE and ARM NEON.
+
+* `enable`, if present, is a boolean where `true` enables and `false` disables the use of SIMD.
+
+This method always returns the current state.
+
+This feature is currently disabled by default
+but future versions may enable it by default.
+
+When enabled, versions of liborc prior to 0.4.24
+and versions of libvips prior to 8.2.0
+have been known to crash under heavy load.
+
+```javascript
+var simd = sharp.simd();
+// simd is `true` if SIMD is currently enabled
+```
+
+```javascript
+var simd = sharp.simd(true);
+// attempts to enable the use of SIMD, returning true if available
+```

docs/changelog.md

@@ -1,7 +1,306 @@
 # Changelog
 
+### v0.15 - "*outfit*"
+
+Requires libvips v8.3.1
+
+#### v0.15.1 - 12<sup>th</sup> July 2016
+
+* Concat Stream-based input in single operation for ~+3% perf and less GC.
+  [#429](https://github.com/lovell/sharp/issues/429)
+  [@papandreou](https://github.com/papandreou)
+
+* Add alpha channel, if required, before extend operation.
+  [#439](https://github.com/lovell/sharp/pull/439)
+  [@frulo](https://github.com/frulo)
+
+* Allow overlay image to be repeated across entire image via tile option.
+  [#443](https://github.com/lovell/sharp/pull/443)
+  [@lemnisk8](https://github.com/lemnisk8)
+
+* Add cutout option to overlayWith feature, applies only the alpha channel of the overlay image.
+  [#448](https://github.com/lovell/sharp/pull/448)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Ensure scaling factors are calculated independently to prevent rounding errors.
+  [#452](https://github.com/lovell/sharp/issues/452)
+  [@puzrin](https://github.com/puzrin)
+
+* Add --sharp-cxx11 flag to compile with gcc's new C++11 ABI.
+  [#456](https://github.com/lovell/sharp/pull/456)
+  [@kapouer](https://github.com/kapouer)
+
+* Add top/left offset support to overlayWith operation.
+  [#473](https://github.com/lovell/sharp/pull/473)
+  [@rnanwani](https://github.com/rnanwani)
+
+* Add convolve operation for kernel-based convolution.
+  [#479](https://github.com/lovell/sharp/pull/479)
+  [@mhirsch](https://github.com/mhirsch)
+
+* Add greyscale option to threshold operation for colourspace conversion control.
+  [#480](https://github.com/lovell/sharp/pull/480)
+  [@mhirsch](https://github.com/mhirsch)
+
+* Ensure ICC profiles are licenced for distribution.
+  [#486](https://github.com/lovell/sharp/issues/486)
+  [@kapouer](https://github.com/kapouer)
+
+* Allow images with an alpha channel to work with LAB-colourspace based sharpen.
+  [#490](https://github.com/lovell/sharp/issues/490)
+  [@jwagner](https://github.com/jwagner)
+
+* Add trim operation to remove "boring" edges.
+  [#492](https://github.com/lovell/sharp/pull/492)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Add bandbool feature for channel-wise boolean operations.
+  [#496](https://github.com/lovell/sharp/pull/496)
+  [@mhirsch](https://github.com/mhirsch)
+
+* Add extractChannel operation to extract a channel from an image.
+  [#497](https://github.com/lovell/sharp/pull/497)
+  [@mhirsch](https://github.com/mhirsch)
+
+* Add ability to read and write native libvips .v files.
+  [#500](https://github.com/lovell/sharp/pull/500)
+  [@mhirsch](https://github.com/mhirsch)
+
+* Add boolean feature for bitwise image operations.
+  [#501](https://github.com/lovell/sharp/pull/501)
+  [@mhirsch](https://github.com/mhirsch)
+
+#### v0.15.0 - 21<sup>st</sup> May 2016
+
+* Use libvips' new Lanczos 3 kernel as default for image reduction.
+  Deprecate interpolateWith method, now provided as a resize option.
+  [#310](https://github.com/lovell/sharp/issues/310)
+  [@jcupitt](https://github.com/jcupitt)
+
+* Take advantage of libvips v8.3 features.
+  Add support for libvips' new GIF and SVG loaders.
+  Pre-built binaries now include giflib and librsvg, exclude *magick.
+  Use shrink-on-load for WebP input.
+  Break existing sharpen API to accept sigma and improve precision.
+  [#369](https://github.com/lovell/sharp/issues/369)
+
+* Remove unnecessary (un)premultiply operations when not resizing/compositing.
+  [#413](https://github.com/lovell/sharp/issues/413)
+  [@jardakotesovec](https://github.com/jardakotesovec)
+
+### v0.14 - "*needle*"
+
+Requires libvips v8.2.3
+
+#### v0.14.1 - 16<sup>th</sup> April 2016
+
+* Allow removal of limitation on input pixel count via limitInputPixels. Use with care.
+  [#250](https://github.com/lovell/sharp/issues/250)
+  [#316](https://github.com/lovell/sharp/pull/316)
+  [@anandthakker](https://github.com/anandthakker)
+  [@kentongray](https://github.com/kentongray)
+
+* Use final output image for metadata passed to callback.
+  [#399](https://github.com/lovell/sharp/pull/399)
+  [@salzhrani](https://github.com/salzhrani)
+
+* Add support for writing tiled images to a zip container.
+  [#402](https://github.com/lovell/sharp/pull/402)
+  [@felixbuenemann](https://github.com/felixbuenemann)
+
+* Allow use of embed with 1 and 2 channel images.
+  [#411](https://github.com/lovell/sharp/issues/411)
+  [@janaz](https://github.com/janaz)
+
+* Improve Electron compatibility by allowing node-gyp rebuilds without npm.
+  [#412](https://github.com/lovell/sharp/issues/412)
+  [@nouh](https://github.com/nouh)
+
+#### v0.14.0 - 2<sup>nd</sup> April 2016
+
+* Add ability to extend (pad) the edges of an image.
+  [#128](https://github.com/lovell/sharp/issues/128)
+  [@blowsie](https://github.com/blowsie)
+
+* Add support for Zoomify and Google tile layouts. Breaks existing tile API.
+  [#223](https://github.com/lovell/sharp/issues/223)
+  [@bdunnette](https://github.com/bdunnette)
+
+* Improvements to overlayWith: differing sizes/formats, gravity, buffer input.
+  [#239](https://github.com/lovell/sharp/issues/239)
+  [@chrisriley](https://github.com/chrisriley)
+
+* Add entropy-based crop strategy to remove least interesting edges.
+  [#295](https://github.com/lovell/sharp/issues/295)
+  [@rightaway](https://github.com/rightaway)
+
+* Expose density metadata; set density of images from vector input.
+  [#338](https://github.com/lovell/sharp/issues/338)
+  [@lookfirst](https://github.com/lookfirst)
+
+* Emit post-processing 'info' event for Stream output.
+  [#367](https://github.com/lovell/sharp/issues/367)
+  [@salzhrani](https://github.com/salzhrani)
+
+* Ensure output image EXIF Orientation values are within 1-8 range.
+  [#385](https://github.com/lovell/sharp/pull/385)
+  [@jtobinisaniceguy](https://github.com/jtobinisaniceguy)
+
+* Ensure ratios are not swapped when rotating 90/270 and ignoring aspect.
+  [#387](https://github.com/lovell/sharp/issues/387)
+  [@kleisauke](https://github.com/kleisauke)
+
+* Remove deprecated style of calling extract API. Breaks calls using positional arguments.
+  [#276](https://github.com/lovell/sharp/issues/276)
+
+### v0.13 - "*mind*"
+
+Requires libvips v8.2.2
+
+#### v0.13.1 - 27<sup>th</sup> February 2016
+
+* Fix embedding onto transparent backgrounds; regression introduced in v0.13.0.
+  [#366](https://github.com/lovell/sharp/issues/366)
+  [@diegocsandrim](https://github.com/diegocsandrim)
+
+#### v0.13.0 - 15<sup>th</sup> February 2016
+
+* Improve vector image support by allowing control of density/DPI.
+  Switch pre-built libs from Imagemagick to Graphicsmagick.
+  [#110](https://github.com/lovell/sharp/issues/110)
+  [@bradisbell](https://github.com/bradisbell)
+
+* Add support for raw, uncompressed pixel Buffer/Stream input.
+  [#220](https://github.com/lovell/sharp/issues/220)
+  [@mikemorris](https://github.com/mikemorris)
+
+* Switch from libvips' C to C++ bindings, requires upgrade to v8.2.2.
+  [#299](https://github.com/lovell/sharp/issues/299)
+
+* Control number of open files in libvips' cache; breaks existing `cache` behaviour.
+  [#315](https://github.com/lovell/sharp/issues/315)
+  [@impomezia](https://github.com/impomezia)
+
+* Ensure 16-bit input images can be normalised and embedded onto transparent backgrounds.
+  [#339](https://github.com/lovell/sharp/issues/339)
+  [#340](https://github.com/lovell/sharp/issues/340)
+  [@janaz](https://github.com/janaz)
+
+* Ensure selected format takes precedence over any unknown output filename extension.
+  [#344](https://github.com/lovell/sharp/issues/344)
+  [@ubaltaci](https://github.com/ubaltaci)
+
+* Add support for libvips' PBM, PGM, PPM and FITS image format loaders.
+  [#347](https://github.com/lovell/sharp/issues/347)
+  [@oaleynik](https://github.com/oaleynik)
+
+* Ensure default crop gravity is center/centre.
+  [#351](https://github.com/lovell/sharp/pull/351)
+  [@joelmukuthu](https://github.com/joelmukuthu)
+
+* Improve support for musl libc systems e.g. Alpine Linux.
+  [#354](https://github.com/lovell/sharp/issues/354)
+  [#359](https://github.com/lovell/sharp/pull/359)
+  [@download13](https://github.com/download13)
+  [@wjordan](https://github.com/wjordan)
+
+* Small optimisation when reducing by an integral factor to favour shrink over affine.
+
+* Add support for gamma correction of images with an alpha channel.
+
+### v0.12 - "*look*"
+
+Requires libvips v8.2.0
+
+#### v0.12.2 - 16<sup>th</sup> January 2016
+
+* Upgrade libvips to v8.2.0 for improved vips_shrink.
+
+* Add pre-compiled libvips for ARMv6+ CPUs.
+
+* Ensure 16-bit input images work with embed option.
+  [#325](https://github.com/lovell/sharp/issues/325)
+  [@janaz](https://github.com/janaz)
+
+* Allow compilation with gmake to provide FreeBSD support.
+  [#326](https://github.com/lovell/sharp/issues/326)
+  [@c0decafe](https://github.com/c0decafe)
+
+* Attempt to remove temporary file after installation.
+  [#331](https://github.com/lovell/sharp/issues/331)
+  [@dtoubelis](https://github.com/dtoubelis)
+
+#### v0.12.1 - 12<sup>th</sup> December 2015
+
+* Allow use of SIMD vector instructions (via liborc) to be toggled on/off.
+  [#172](https://github.com/lovell/sharp/issues/172)
+  [@bkw](https://github.com/bkw)
+  [@puzrin](https://github.com/puzrin)
+
+* Ensure embedded ICC profiles output with perceptual intent.
+  [#321](https://github.com/lovell/sharp/issues/321)
+  [@vlapo](https://github.com/vlapo)
+
+* Use the NPM-configured HTTPS proxy, if any, for binary downloads.
+
+#### v0.12.0 - 23<sup>rd</sup> November 2015
+
+* Bundle pre-compiled libvips and its dependencies for 64-bit Linux and Windows.
+  [#42](https://github.com/lovell/sharp/issues/42)
+
+* Take advantage of libvips v8.1.0+ features.
+  [#152](https://github.com/lovell/sharp/issues/152)
+
+* Add support for 64-bit Windows. Drop support for 32-bit Windows.
+  [#224](https://github.com/lovell/sharp/issues/224)
+  [@sabrehagen](https://github.com/sabrehagen)
+
+* Switch default interpolator to bicubic.
+  [#289](https://github.com/lovell/sharp/issues/289)
+  [@mahnunchik](https://github.com/mahnunchik)
+
+* Pre-extract rotatation should not swap width/height.
+  [#296](https://github.com/lovell/sharp/issues/296)
+  [@asilvas](https://github.com/asilvas)
+
+* Ensure 16-bit+alpha input images are (un)premultiplied correctly.
+  [#301](https://github.com/lovell/sharp/issues/301)
+  [@izaakschroeder](https://github.com/izaakschroeder)
+
+* Add `threshold` operation.
+  [#303](https://github.com/lovell/sharp/pull/303)
+  [@dacarley](https://github.com/dacarley)
+
+* Add `negate` operation.
+  [#306](https://github.com/lovell/sharp/pull/306)
+  [@dacarley](https://github.com/dacarley)
+
+* Support `options` Object with existing `extract` operation.
+  [#309](https://github.com/lovell/sharp/pull/309)
+  [@papandreou](https://github.com/papandreou)
+
 ### v0.11 - "*knife*"
 
+#### v0.11.4 - 5<sup>th</sup> November 2015
+
+* Add corners, e.g. `northeast`, to existing `gravity` option.
+  [#291](https://github.com/lovell/sharp/pull/291)
+  [@brandonaaron](https://github.com/brandonaaron)
+
+* Ensure correct auto-rotation for EXIF Orientation values 2 and 4.
+  [#288](https://github.com/lovell/sharp/pull/288)
+  [@brandonaaron](https://github.com/brandonaaron)
+
+* Make static linking possible via `--runtime_link` install option.
+  [#287](https://github.com/lovell/sharp/pull/287)
+  [@vlapo](https://github.com/vlapo)
+
+#### v0.11.3 - 8<sup>th</sup> September 2015
+
+* Intrepret blurSigma, sharpenFlat, and sharpenJagged as double precision.
+  [#263](https://github.com/lovell/sharp/pull/263)
+  [@chrisriley](https://github.com/chrisriley)
+
 #### v0.11.2 - 28<sup>th</sup> August 2015
 
 * Allow crop gravity to be provided as a String.

docs/index.md

@@ -1,18 +1,29 @@
 # sharp
 
 The typical use case for this high speed Node.js module
-is to convert large images of many formats to
+is to convert large images in common formats to
 smaller, web-friendly JPEG, PNG and WebP images of varying dimensions.
 
-Resizing an image is typically 4x faster than using
-the quickest ImageMagick and GraphicsMagick settings.
+Resizing an image is typically 4x-5x faster than using the
+quickest ImageMagick and GraphicsMagick settings.
+
+Colour spaces, embedded ICC profiles and alpha transparency channels are all handled correctly.
+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 Windows (x64), Linux and ARMv6+ systems do not require
+the installation of any external runtime dependencies.
+
+Use with OS X is as simple as running `brew install homebrew/science/vips`
+to install the libvips dependency.
 
 [![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.png?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
 
 ### Formats
 
-This module supports reading JPEG, PNG, WebP, TIFF, OpenSlide,
-GIF and other libmagick-supported formats.
+This module supports reading JPEG, PNG, WebP, TIFF, GIF and SVG images.
 
 Output images can be in JPEG, PNG and WebP formats as well as uncompressed raw pixel data.
 
@@ -25,14 +36,6 @@ suitable for use with "slippy map" tile viewers like
 [OpenSeadragon](https://github.com/openseadragon/openseadragon)
 and [Leaflet](https://github.com/turban/Leaflet.Zoomify).
 
-### Features
-
-As well as image resizing, operations such as
-rotation, extraction, compositing and gamma correction are available.
-
-Colour spaces, embedded ICC profiles and alpha transparency channels
-are all handled correctly.
-
 ### Fast
 
 This module is powered by the blazingly fast
@@ -84,12 +87,22 @@ the help and code contributions of the following people:
 * [Victor Mateevitsi](https://github.com/mvictoras)
 * [Alaric Holloway](https://github.com/skedastik)
 * [Bernhard K. Weisshuhn](https://github.com/bkw)
+* [David A. Carley](https://github.com/dacarley)
+* [John Tobin](https://github.com/jtobinisaniceguy)
+* [Kenton Gray](https://github.com/kentongray)
+* [Felix Bünemann](https://github.com/felixbuenemann)
+* [Samy Al Zahrani](https://github.com/salzhrani)
+* [Chintan Thakkar](https://github.com/lemnisk8)
+* [F. Orlando Galashan](https://github.com/frulo)
+* [Kleis Auke Wolthuizen](https://github.com/kleisauke)
+* [Matt Hirsch](https://github.com/mhirsch)
+* [Rahul Nanwani](https://github.com/rnanwani)
 
 Thank you!
 
 ### Licence
 
-Copyright 2013, 2014, 2015 Lovell Fuller and contributors.
+Copyright 2013, 2014, 2015, 2016 Lovell Fuller and contributors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

docs/install.md

@@ -6,74 +6,77 @@ npm install sharp
 
 ### Prerequisites
 
-* Node.js v0.10+ or io.js
-* [libvips](https://github.com/jcupitt/libvips) v7.40.0+ (7.42.0+ recommended)
-* C++11 compatible compiler such as gcc 4.6+, clang 3.0+ or MSVC 2013 (io.js v3+ requires gcc 4.8+)
+* C++11 compatible compiler such as gcc 4.8+, clang 3.0+ or MSVC 2013+
+* [node-gyp](https://github.com/TooTallNate/node-gyp#installation)
 
 ### Linux
 
-[![Ubuntu 12.04 Build Status](https://travis-ci.org/lovell/sharp.png?branch=master)](https://travis-ci.org/lovell/sharp)
-[![Centos 6.5 Build Status](https://snap-ci.com/lovell/sharp/branch/master/build_image)](https://snap-ci.com/lovell/sharp/branch/master)
+[![Ubuntu 14.04 Build Status](https://travis-ci.org/lovell/sharp.png?branch=master)](https://travis-ci.org/lovell/sharp)
+[![Linux Build Status](https://circleci.com/gh/lovell/sharp.svg?style=svg&circle-token=6cb6d1d287a51af83722b19ed8885377fbc85e5c)](https://circleci.com/gh/lovell/sharp)
 
-For a system-wide installation of the most suitable version of
-libvips and its dependencies on the following Operating Systems:
+libvips and its dependencies are fetched and stored within `node_modules/sharp/lib` during `npm install`.
+This involves an automated HTTPS download of approximately 6.7MB.
+
+Most recent Linux-based operating systems with glibc running on x64 and ARMv6+ CPUs should "just work", e.g.:
 
 * Debian 7, 8
-* Ubuntu 12.04, 14.04, 14.10, 15.04
-* Mint 13, 17
-* RHEL/Centos/Scientific 6, 7
-* Fedora 21, 22
-* Amazon Linux 2014.09, 2015.03
-* OpenSuse 13
+* Ubuntu 12.04, 14.04, 15.10, 16.04
+* Centos 7
+* Fedora 22, 23
+* openSUSE 13.2
+* Archlinux 2015.06.01
+* Raspbian Jessie
+* Amazon Linux 2015.03, 2015.09
 
-run the following as a user with `sudo` access:
+To use your own version of libvips instead of the provided binaries, make sure it is
+at least the version listed under `config.libvips` in the `package.json` file,
+that it can be located using `pkg-config --modversion vips-cpp`.
+
+There are [changes in the C++11 ABI](https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html)
+when using v5.1+ of the `g++` compiler.
+If you have installed `libvips-dev` via package manager on an OS such as Debian testing/unstable,
+you can pass the required value of the `_GLIBCXX_USE_CXX11_ABI` macro using the `--sharp-cxx11` flag.
 
 ```sh
+npm install --sharp-cxx11=1
+```
+
+If you are using non-stadard paths (anything other than `/usr` or `/usr/local`),
+you might need to set `PKG_CONFIG_PATH` during `npm install`
+and `LD_LIBRARY_PATH` at runtime.
+
+This allows the use of newer versions of libvips with older versions of sharp.
+
+For 32-bit Intel CPUs and older Linux-based operating systems such as Centos 6,
+a system-wide installation of the most suitable version of
+libvips and its dependencies can be achieved by running
+the following command as a user with `sudo` access
+(requires `curl` and `pkg-config`):
+
+```sh
+# WARNING: This script is deprecated. You probably don't need to run it. Please read above.
 curl -s https://raw.githubusercontent.com/lovell/sharp/master/preinstall.sh | sudo bash -
 ```
 
-or run the following as `root`:
-
-```sh
-curl -s https://raw.githubusercontent.com/lovell/sharp/master/preinstall.sh | bash -
-```
-
-The [preinstall.sh](https://github.com/lovell/sharp/blob/master/preinstall.sh) script requires `curl` and `pkg-config`.
-
-Add `--with-openslide` to enable OpenSlide support:
-
-```sh
-curl -s https://raw.githubusercontent.com/lovell/sharp/master/preinstall.sh | sudo bash -s -- --with-openslide
-```
-
-#### Ubuntu LTS
-
-libvips v7.40.6 is available via a PPA.
-
-##### 12.04
-
-```sh
-sudo add-apt-repository -y ppa:lovell/precise-backport-vips
-sudo apt-get update
-sudo apt-get install -y libvips-dev libgsf-1-dev
-```
-
-##### 14.04
-
-```sh
-sudo add-apt-repository -y ppa:lovell/trusty-backport-vips
-sudo apt-get update
-sudo apt-get install -y libvips-dev libgsf-1-dev
-```
+For Linux-based operating systems such as Alpine that use musl libc,
+the smaller stack size means libvips' cache should be disabled
+via `sharp.cache(false)` to avoid a stack overflow.
 
 ### Mac OS
 
-[![OS X 10.9.5 Build Status](https://travis-ci.org/lovell/sharp-osx-ci.png?branch=master)](https://travis-ci.org/lovell/sharp-osx-ci)
+[![OS X 10.9.5 Build Status](https://travis-ci.org/lovell/sharp.png?branch=master)](https://travis-ci.org/lovell/sharp)
 
-Install libvips via homebrew:
+libvips must be installed before `npm install` is run.
+This can be achieved via homebrew:
 
 ```sh
-brew install homebrew/science/vips --with-webp --with-graphicsmagick
+brew install homebrew/science/vips
+```
+
+For WebP suppport use:
+
+```sh
+brew install homebrew/science/vips --with-webp
 ```
 
 A missing or incorrectly configured _Xcode Command Line Tools_ installation
@@ -88,18 +91,21 @@ If so, please try `brew link gettext --force`.
 
 ### Windows
 
-[![Windows Server 2012 Build Status](https://ci.appveyor.com/api/projects/status/pgtul704nkhhg6sg)](https://ci.appveyor.com/project/lovell/sharp)
+[![Windows x64 Build Status](https://ci.appveyor.com/api/projects/status/pgtul704nkhhg6sg)](https://ci.appveyor.com/project/lovell/sharp)
 
-Requires x86 32-bit Node.js or io.js (use `iojs.exe` rather than `node.exe`).
+libvips and its dependencies are fetched and stored within `node_modules\sharp` during `npm install`.
+This involves an automated HTTPS download of approximately 9MB.
 
-The WebP format is currently unsupported.
+Only 64-bit (x64) `node.exe` is supported.
 
-1. Ensure the [node-gyp prerequisites](https://github.com/TooTallNate/node-gyp#installation) are met.
-2. [Download](http://www.vips.ecs.soton.ac.uk/supported/current/win32/) and unzip `vips-dev.x.y.z.zip`.
-3. Set the `VIPS_HOME` environment variable to the full path of the `vips-dev-x.y.z` directory.
-4. Add `vips-dev-x.y.z\bin` to `PATH`.
+### FreeBSD
 
-Versions of MSVC more recent than 2013 may require the use of `npm install --arch=ia32 --msvs_version=2013`.
+libvips must be installed before `npm install` is run.
+This can be achieved via [FreshPorts](https://www.freshports.org/graphics/vips/):
+
+```sh
+cd /usr/ports/graphics/vips/ && make install clean
+```
 
 ### Heroku
 
@@ -109,15 +115,127 @@ and its dependencies.
 
 ### Docker
 
-[Marc Bachmann](https://github.com/marcbachmann) maintains a
-[Dockerfile for libvips](https://github.com/marcbachmann/dockerfile-libvips).
+[Marc Bachmann](https://github.com/marcbachmann) maintains an
+[Ubuntu-based Dockerfile for libvips](https://github.com/marcbachmann/dockerfile-libvips).
 
 ```sh
 docker pull marcbachmann/libvips
 ```
 
+[Will Jordan](https://github.com/wjordan) maintains an
+[Alpine-based Dockerfile for libvips](https://github.com/wjordan/dockerfile-libvips).
+
+```sh
+docker pull wjordan/libvips
+```
+
+### AWS Lambda
+
+In order to use sharp on AWS Lambda, you need to [create a deployment package](http://docs.aws.amazon.com/lambda/latest/dg/nodejs-create-deployment-pkg.html). Because sharp
+downloads and links libraries for the current platform during `npm install` you have to
+do this on a system similar to the [Lambda Execution Environment](http://docs.aws.amazon.com/lambda/latest/dg/current-supported-versions.html). The easiest ways to do this, is to setup a
+small t2.micro instance using the AMI ID listed in the previous link, ssh into it as ec2-user
+and follow the instructions below.
+
+Install dependencies:
+
+```sh
+curl -s https://rpm.nodesource.com/setup_4.x | sudo bash -
+sudo yum install -y gcc-c++ nodejs
+```
+
+Copy your code and package.json to the instance using `scp` and create a deployment package:
+
+```sh
+cd sharp-lambda-example
+npm install
+zip -ur9 ../sharp-lambda-example.zip index.js node_modules
+```
+
+You can now download your deployment ZIP using `scp` and upload it to Lambda. Be sure to set your Lambda runtime to Node.js 4.3.
+
+**Performance Tip:** To get the best performance on Lambda choose the largest memory available because this also gives you the most cpu time (a 1536 MB function is 12x faster than a 128 MB function).
+
 ### Build tools
 
 * [gulp-responsive](https://www.npmjs.com/package/gulp-responsive)
-* [gulp-sharp](https://www.npmjs.com/package/gulp-sharp)
 * [grunt-sharp](https://www.npmjs.com/package/grunt-sharp)
+
+### Security
+
+Many users of this module process untrusted, user-supplied images,
+but there are aspects of security to consider when doing so.
+
+It is possible to compile libvips with support for various third-party image loaders.
+Each of these libraries has undergone differing levels of security testing.
+
+Whilst tools such as [American Fuzzy Lop](http://lcamtuf.coredump.cx/afl/)
+and [Valgrind](http://valgrind.org/) have been used to test
+the most popular web-based formats, as well as libvips itself,
+you are advised to perform your own testing and sandboxing.
+
+ImageMagick in particular has a relatively large attack surface,
+which can be partially mitigated with a
+[policy.xml](http://www.imagemagick.org/script/resources.php)
+configuration file to prevent the use of coders known to be vulnerable.
+
+```xml
+<policymap>
+  <policy domain="coder" rights="none" pattern="EPHEMERAL" />
+  <policy domain="coder" rights="none" pattern="URL" />
+  <policy domain="coder" rights="none" pattern="HTTPS" />
+  <policy domain="coder" rights="none" pattern="MVG" />
+  <policy domain="coder" rights="none" pattern="MSL" />
+  <policy domain="coder" rights="none" pattern="TEXT" />
+  <policy domain="coder" rights="none" pattern="SHOW" />
+  <policy domain="coder" rights="none" pattern="WIN" />
+  <policy domain="coder" rights="none" pattern="PLT" />
+</policymap>
+```
+
+Set the `MAGICK_CONFIGURE_PATH` environment variable
+to the directory containing the `policy.xml` file.
+
+### Licences
+
+If a global installation of libvips that meets the
+minimum version requirement cannot be found,
+this module will download a pre-compiled bundle of libvips
+and its dependencies on Linux and Windows machines.
+
+Should you need to manually download and inspect these files,
+you can do so via https://dl.bintray.com/lovell/sharp/
+
+This module is licensed under the terms of the
+[Apache 2.0 Licence](https://github.com/lovell/sharp/blob/master/LICENSE).
+
+The libraries downloaded and used by this module
+are done so under the terms of the following licences,
+all of which are compatible with the Apache 2.0 Licence.
+
+Use of libraries under the terms of the LGPLv3 is via the
+"any later version" clause of the LGPLv2 or LGPLv2.1.
+
+| Library       | Used under the terms of                                                                                  |
+|---------------|----------------------------------------------------------------------------------------------------------|
+| cairo         | Mozilla Public License 2.0                                                                               |
+| fontconfig    | [fontconfig Licence](https://cgit.freedesktop.org/fontconfig/tree/COPYING) (BSD-like)                    |
+| freetype      | [freetype Licence](http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/docs/FTL.TXT) (BSD-like) |
+| giflib        | MIT Licence                                                                                              |
+| glib          | LGPLv3                                                                                                   |
+| harfbuzz      | MIT Licence                                                                                              |
+| lcms          | MIT Licence                                                                                              |
+| libcroco      | LGPLv3                                                                                                   |
+| libexif       | LGPLv3                                                                                                   |
+| libffi        | MIT Licence                                                                                              |
+| libgsf        | LGPLv3                                                                                                   |
+| libjpeg-turbo | [zlib License, IJG License](https://github.com/libjpeg-turbo/libjpeg-turbo/blob/master/LICENSE.md)       |
+| libpng        | [libpng License](http://www.libpng.org/pub/png/src/libpng-LICENSE.txt)                                   |
+| librsvg       | LGPLv3                                                                                                   |
+| libtiff       | [libtiff License](http://www.libtiff.org/misc.html) (BSD-like)                                           |
+| libvips       | LGPLv3                                                                                                   |
+| libwebp       | New BSD License                                                                                          |
+| libxml2       | MIT Licence                                                                                              |
+| pango         | LGPLv3                                                                                                   |
+| pixman        | MIT Licence                                                                                              |
+| zlib          | [zlib Licence](https://github.com/madler/zlib/blob/master/zlib.h)                                        |

docs/performance.md

@@ -2,41 +2,45 @@
 
 ### Test environment
 
-* AWS EC2 [c4.xlarge](http://aws.amazon.com/ec2/instance-types/#c4)
-* Ubuntu 15.04
-* Node.js 0.12.7
-* libvips 8.0.2
-* liborc 0.4.22
+* AWS EC2 [c4.xlarge](http://aws.amazon.com/ec2/instance-types/#c4) (4x E5-2666 v3 @ 2.90GHz)
+* Amazon Linux AMI 2016.03.1 (HVM), SSD Volume Type
+* Node.js v6.2.0
 
 ### The contenders
 
-* [lwip](https://www.npmjs.com/package/lwip) 0.0.7 - Wrapper around CImg, compiles dependencies from source
-* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) git@45d4e2e - Wrapper around libmagick++, supports Buffers only.
-* [imagemagick](https://www.npmjs.com/package/imagemagick) 0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
-* [gm](https://www.npmjs.com/package/gm) 1.18.1 - Fully featured wrapper around GraphicsMagick's `convert` command line utility.
-* sharp 0.11.0 - Caching within libvips disabled to ensure a fair comparison.
+* [jimp](https://www.npmjs.com/package/jimp) v0.2.24 - Image processing in pure JavaScript. Bilinear interpolation only.
+* [lwip](https://www.npmjs.com/package/lwip) v0.0.9 - Wrapper around CImg, compiles dependencies from source.
+* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) v1.9.2 - Wrapper around libmagick++, supports Buffers only.
+* [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
+* [gm](https://www.npmjs.com/package/gm) v1.22.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
+* sharp v0.15.0 / libvips v8.3.1 - Caching within libvips disabled to ensure a fair comparison.
 
 ### The task
 
-Decompress a 2725x2225 JPEG image, resize to 720x480 using bilinear interpolation, then compress to JPEG.
+Decompress a 2725x2225 JPEG image,
+resize to 720x480 using Lanczos 3 resampling (where available),
+then compress to JPEG.
 
 ### Results
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |
-| lwip               | file   | file   |    1.75 |        1 |
-| lwip               | buffer | buffer |    2.21 |      1.3 |
-| imagemagick-native | buffer | buffer |    7.13 |      4.1 |
-| gm                 | buffer | buffer |    7.27 |      4.2 |
-| gm                 | file   | file   |    7.33 |      4.2 |
-| imagemagick        | file   | file   |   10.04 |      5.7 |
-| sharp              | stream | stream |   23.12 |     13.2 |
-| sharp              | file   | file   |   24.43 |     14.0 |
-| sharp              | file   | buffer |   24.55 |     14.0 |
-| sharp              | buffer | file   |   24.86 |     14.2 |
-| sharp              | buffer | buffer |   24.92 |     14.2 |
+| jimp (bilinear)    | file   | file   |    0.94 |      1.0 |
+| jimp (bilinear)    | buffer | buffer |    0.98 |      1.0 |
+| lwip               | file   | file   |    1.14 |      1.2 |
+| lwip               | buffer | buffer |    1.14 |      1.2 |
+| imagemagick-native | buffer | buffer |    1.66 |      1.8 |
+| imagemagick        | file   | file   |    5.08 |      5.4 |
+| gm                 | buffer | buffer |    5.43 |      5.7 |
+| gm                 | file   | file   |    5.46 |      5.8 |
+| sharp              | stream | stream |   26.52 |     28.2 |
+| sharp              | file   | file   |   28.16 |     30.0 |
+| sharp              | file   | buffer |   28.27 |     30.1 |
+| sharp              | buffer | file   |   28.42 |     30.2 |
+| sharp              | buffer | buffer |   28.42 |     30.2 |
 
-Greater performance can be expected with caching enabled (default) and using 8+ core machines.
+Greater libvips performance can be expected with caching enabled (default)
+and using 8+ core machines, especially those with larger L1/L2 CPU caches.
 
 The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
 
@@ -50,14 +54,20 @@ brew install graphicsmagick
 ```
 
 ```sh
-sudo apt-get install imagemagick graphicsmagick libmagick++-dev
+sudo apt-get install imagemagick libmagick++-dev graphicsmagick
+```
+
+```sh
+sudo yum install ImageMagick-devel ImageMagick-c++-devel GraphicsMagick
 ```
 
 ### Running the benchmark test
 
 ```sh
 git clone https://github.com/lovell/sharp.git
-cd sharp/test/bench
+cd sharp
+npm install
+cd test/bench
 npm install
 npm test
 ```

mkdocs.yml

@@ -1,7 +1,7 @@
 site_name: sharp
 site_url: http://sharp.dimens.io/
 repo_url: https://github.com/lovell/sharp
-site_description: The fastest Node.js module for resizing JPEG, PNG, WebP and TIFF images. Uses the libvips library.
+site_description: High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images
 copyright: <a href="https://dimens.io/">dimens.io</a>
 google_analytics: ['UA-13034748-12', 'sharp.dimens.io']
 theme: readthedocs

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sharp",
-  "version": "0.11.2",
+  "version": "0.15.1",
   "author": "Lovell Fuller <npm@lovell.info>",
   "contributors": [
     "Pierre Inglebert <pierre.inglebert@gmail.com>",
@@ -16,16 +16,26 @@
     "Linus Unnebäck <linus@folkdatorn.se>",
     "Victor Mateevitsi <mvictoras@gmail.com>",
     "Alaric Holloway <alaric.holloway@gmail.com>",
-    "Bernhard K. Weisshuhn <bkw@codingforce.com>"
+    "Bernhard K. Weisshuhn <bkw@codingforce.com>",
+    "Chris Riley <criley@primedia.com>",
+    "David Carley <dacarley@gmail.com>",
+    "John Tobin <john@limelightmobileinc.com>",
+    "Kenton Gray <kentongray@gmail.com>",
+    "Felix Bünemann <Felix.Buenemann@gmail.com>",
+    "Samy Al Zahrani <samyalzahrany@gmail.com>",
+    "Chintan Thakkar <lemnisk8@gmail.com>",
+    "F. Orlando Galashan <frulo@gmx.de>",
+    "Kleis Auke Wolthuizen <info@kleisauke.nl>",
+    "Matt Hirsch <mhirsch@media.mit.edu>"
   ],
-  "description": "High performance Node.js module to resize JPEG, PNG, WebP and TIFF images using the libvips library",
+  "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images",
   "scripts": {
-    "clean": "rm -rf test/fixtures/output.*",
-    "test": "VIPS_WARNING=0 node ./node_modules/istanbul/lib/cli.js cover ./node_modules/mocha/bin/_mocha -- --slow=5000 --timeout=20000 ./test/unit/*.js",
-    "test-clean": "npm run clean && npm install && npm test",
+    "clean": "rm -rf node_modules/ build/ include/ lib/ coverage/ test/fixtures/output.*",
+    "test": "VIPS_WARNING=0 node ./node_modules/istanbul/lib/cli.js cover ./node_modules/mocha/bin/_mocha -- --slow=5000 --timeout=30000 ./test/unit/*.js",
+    "test-win": "node ./node_modules/mocha/bin/mocha --slow=5000 --timeout=60000 ./test/unit/*.js",
     "test-leak": "./test/leak/leak.sh",
-    "test-win32-node": "node ./node_modules/mocha/bin/mocha --slow=5000 --timeout=30000 ./test/unit/*.js",
-    "test-win32-iojs": "iojs ./node_modules/mocha/bin/mocha --slow=5000 --timeout=30000 ./test/unit/*.js"
+    "test-packaging": "./packaging/test.sh",
+    "test-clean": "rm -rf coverage/ test/fixtures/output.* && npm install && npm test"
   },
   "main": "index.js",
   "repository": {
@@ -37,7 +47,10 @@
     "png",
     "webp",
     "tiff",
+    "gif",
+    "svg",
     "dzi",
+    "image",
     "resize",
     "thumbnail",
     "crop",
@@ -45,24 +58,30 @@
     "vips"
   ],
   "dependencies": {
-    "bluebird": "^2.9.34",
-    "color": "^0.10.1",
-    "nan": "^2.0.8",
-    "semver": "^5.0.1"
+    "bluebird": "^3.4.1",
+    "color": "^0.11.3",
+    "nan": "^2.4.0",
+    "semver": "^5.2.0",
+    "request": "^2.73.0",
+    "tar": "^2.2.1"
   },
   "devDependencies": {
-    "async": "^1.4.2",
-    "coveralls": "^2.11.4",
-    "exif-reader": "1.0.0",
+    "async": "^1.5.2",
+    "bufferutil": "^1.2.1",
+    "coveralls": "^2.11.9",
+    "exif-reader": "^1.0.0",
     "icc": "^0.0.2",
-    "istanbul": "^0.3.18",
-    "mocha": "^2.2.5",
-    "mocha-jshint": "^2.2.3",
+    "istanbul": "^0.4.4",
+    "mocha": "^2.5.3",
+    "mocha-jshint": "^2.3.1",
     "node-cpplint": "^0.4.0",
-    "rimraf": "^2.4.2",
-    "bufferutil": "^1.2.1"
+    "rimraf": "^2.5.3",
+    "unzip": "^0.1.11"
   },
   "license": "Apache-2.0",
+  "config": {
+    "libvips": "8.3.1"
+  },
   "engines": {
     "node": ">=0.10"
   }

packaging/arm-build.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 IP"
+  echo "Build libvips for ARM using Docker, where IP is"
+  echo "the address of a Raspberry Pi running HypriotOS"
+  exit 1
+fi
+IP="$1"
+
+echo "Verifying connectivity to $IP"
+if ! ping -c 1 $IP; then
+  echo "Could not connect to $IP"
+  exit 1
+fi
+
+if ! type sshpass >/dev/null; then
+  echo "Please install sshpass"
+  exit 1
+fi
+
+export SSHPASS=hypriot
+
+echo "Copying arm/Dockerfile and arm/build.sh to device"
+sshpass -e scp -o PreferredAuthentications=password -r arm root@${IP}:/root
+
+echo "Building Raspbian-based container"
+sshpass -e ssh -o PreferredAuthentications=password -t root@${IP} "docker build -t vips-dev-arm arm"
+
+echo "Running arm/build.sh within container"
+sshpass -e ssh -o PreferredAuthentications=password -t root@${IP} "docker run -i -t --rm -v \${PWD}/arm:/arm vips-dev-arm sh -c 'cd /arm && ./build.sh' | tee arm/build.log"
+
+echo "Copying resultant tar.gz file from device"
+sshpass -e scp -o PreferredAuthentications=password root@${IP}:/root/arm/*.tar.gz .

packaging/arm-test.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+  echo "Usage: $0 IP"
+  echo "Test sharp on ARM using Docker, where IP is"
+  echo "the address of a Raspberry Pi running HypriotOS"
+  exit 1
+fi
+IP="$1"
+
+echo "Verifying connectivity to $IP"
+if ! ping -c 1 $IP; then
+  echo "Could not connect to $IP"
+  exit 1
+fi
+
+if ! type sshpass >/dev/null; then
+  echo "Please install sshpass"
+  exit 1
+fi
+
+export SSHPASS=hypriot
+
+echo "Copying sharp source to device"
+sshpass -e scp -o PreferredAuthentications=password -r ../../sharp root@${IP}:/root/sharp
+
+echo "Compile and test within container"
+sshpass -e ssh -o PreferredAuthentications=password -t root@${IP} "docker run -i -t --rm -v \${PWD}/sharp:/s hypriot/rpi-node:5 sh -c 'cd /s && npm install --unsafe-perm && npm test'"

packaging/arm/Dockerfile

@@ -0,0 +1,5 @@
+FROM resin/rpi-raspbian:jessie
+MAINTAINER Lovell Fuller <npm@lovell.info>
+
+# Build dependencies
+RUN apt-get update && apt-get install -y build-essential autoconf libtool nasm gtk-doc-tools texinfo curl

packaging/arm/build.sh

@@ -0,0 +1,211 @@
+#!/bin/sh
+
+# To be run inside a Raspbian container
+
+# Working directories
+DEPS=/deps
+TARGET=/target
+mkdir ${DEPS}
+mkdir ${TARGET}
+
+# Common build paths and flags
+export PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:${TARGET}/lib/pkgconfig"
+export PATH="${PATH}:${TARGET}/bin"
+export CPPFLAGS="-I${TARGET}/include"
+export LDFLAGS="-L${TARGET}/lib"
+export CFLAGS="-O3"
+export CXXFLAGS="-O3"
+
+# Dependency version numbers
+VERSION_ZLIB=1.2.8
+VERSION_FFI=3.2.1
+VERSION_GLIB=2.48.0
+VERSION_XML2=2.9.3
+VERSION_GSF=1.14.36
+VERSION_EXIF=0.6.21
+VERSION_LCMS2=2.7
+VERSION_JPEG=1.4.90
+VERSION_PNG16=1.6.21
+VERSION_WEBP=0.5.0
+VERSION_TIFF=4.0.6
+VERSION_ORC=0.4.25
+VERSION_GDKPIXBUF=2.34.0
+VERSION_FREETYPE=2.6.3
+VERSION_FONTCONFIG=2.11.95
+VERSION_HARFBUZZ=1.2.6
+VERSION_PIXMAN=0.34.0
+VERSION_CAIRO=1.14.6
+VERSION_PANGO=1.40.1
+VERSION_CROCO=0.6.11
+VERSION_SVG=2.40.15
+VERSION_GIF=5.1.4
+VERSION_VIPS=8.3.1
+
+# Least out-of-sync Sourceforge mirror
+SOURCEFORGE_MIRROR=netix
+
+mkdir ${DEPS}/zlib
+curl -Ls http://zlib.net/zlib-${VERSION_ZLIB}.tar.xz | tar xJC ${DEPS}/zlib --strip-components=1
+cd ${DEPS}/zlib
+./configure --prefix=${TARGET} && make install
+rm ${TARGET}/lib/libz.a
+
+mkdir ${DEPS}/ffi
+curl -Ls ftp://sourceware.org/pub/libffi/libffi-${VERSION_FFI}.tar.gz | tar xzC ${DEPS}/ffi --strip-components=1
+cd ${DEPS}/ffi
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --disable-builddir && make install-strip
+
+mkdir ${DEPS}/glib
+curl -Ls https://download.gnome.org/sources/glib/2.48/glib-${VERSION_GLIB}.tar.xz | tar xJC ${DEPS}/glib --strip-components=1
+cd ${DEPS}/glib
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --with-pcre=internal && make install-strip
+
+mkdir ${DEPS}/xml2
+curl -Ls http://xmlsoft.org/sources/libxml2-${VERSION_XML2}.tar.gz | tar xzC ${DEPS}/xml2 --strip-components=1
+cd ${DEPS}/xml2
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --without-python --with-zlib=${TARGET} && make install-strip
+
+mkdir ${DEPS}/gsf
+curl -Ls https://download.gnome.org/sources/libgsf/1.14/libgsf-${VERSION_GSF}.tar.xz | tar xJC ${DEPS}/gsf --strip-components=1
+cd ${DEPS}/gsf
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/exif
+curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/libexif/libexif/${VERSION_EXIF}/libexif-${VERSION_EXIF}.tar.bz2 | tar xjC ${DEPS}/exif --strip-components=1
+cd ${DEPS}/exif
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/lcms2
+curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/lcms/lcms/${VERSION_LCMS2}/lcms2-${VERSION_LCMS2}.tar.gz | tar xzC ${DEPS}/lcms2 --strip-components=1
+cd ${DEPS}/lcms2
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/jpeg
+curl -Ls https://github.com/libjpeg-turbo/libjpeg-turbo/archive/${VERSION_JPEG}.tar.gz | tar xzC ${DEPS}/jpeg --strip-components=1
+cd ${DEPS}/jpeg
+autoreconf -fiv && ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --with-jpeg8 --without-turbojpeg && make install-strip
+
+mkdir ${DEPS}/png16
+curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/libpng/libpng16/${VERSION_PNG16}/libpng-${VERSION_PNG16}.tar.xz | tar xJC ${DEPS}/png16 --strip-components=1
+cd ${DEPS}/png16
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/webp
+curl -Ls http://downloads.webmproject.org/releases/webp/libwebp-${VERSION_WEBP}.tar.gz | tar xzC ${DEPS}/webp --strip-components=1
+cd ${DEPS}/webp
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/tiff
+curl -Ls http://download.osgeo.org/libtiff/tiff-${VERSION_TIFF}.tar.gz | tar xzC ${DEPS}/tiff --strip-components=1
+cd ${DEPS}/tiff
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+rm ${TARGET}/lib/libtiffxx*
+
+mkdir ${DEPS}/orc
+curl -Ls http://gstreamer.freedesktop.org/data/src/orc/orc-${VERSION_ORC}.tar.xz | tar xJC ${DEPS}/orc --strip-components=1
+cd ${DEPS}/orc
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/gdkpixbuf
+curl -Ls https://download.gnome.org/sources/gdk-pixbuf/2.34/gdk-pixbuf-${VERSION_GDKPIXBUF}.tar.xz | tar xJC ${DEPS}/gdkpixbuf --strip-components=1
+cd ${DEPS}/gdkpixbuf
+LD_LIBRARY_PATH=${TARGET}/lib ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-introspection --disable-modules --without-libpng --without-libjpeg --without-libtiff --without-gdiplus --with-included-loaders= \
+  && make install-strip
+
+mkdir ${DEPS}/freetype
+curl -Ls http://download.savannah.gnu.org/releases/freetype/freetype-${VERSION_FREETYPE}.tar.gz | tar xzC ${DEPS}/freetype --strip-components=1
+cd ${DEPS}/freetype
+./configure --prefix=${TARGET} --enable-shared --disable-static && make install
+
+mkdir ${DEPS}/fontconfig
+curl -Ls https://www.freedesktop.org/software/fontconfig/release/fontconfig-${VERSION_FONTCONFIG}.tar.bz2 | tar xjC ${DEPS}/fontconfig --strip-components=1
+cd ${DEPS}/fontconfig
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --enable-libxml2 && make install-strip
+
+mkdir ${DEPS}/harfbuzz
+curl -Ls https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-${VERSION_HARFBUZZ}.tar.bz2 | tar xjC ${DEPS}/harfbuzz --strip-components=1
+cd ${DEPS}/harfbuzz
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/pixman
+curl -Ls http://cairographics.org/releases/pixman-${VERSION_PIXMAN}.tar.gz | tar xzC ${DEPS}/pixman --strip-components=1
+cd ${DEPS}/pixman
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --disable-libpng --disable-arm-iwmmxt && make install-strip
+
+mkdir ${DEPS}/cairo
+curl -Ls http://cairographics.org/releases/cairo-${VERSION_CAIRO}.tar.xz | tar xJC ${DEPS}/cairo --strip-components=1
+cd ${DEPS}/cairo
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-xlib --disable-xcb --disable-quartz --disable-win32 --disable-egl --disable-glx --disable-wgl \
+  --disable-script --disable-ps --disable-gobject --disable-trace --disable-interpreter \
+  && make install-strip
+
+mkdir ${DEPS}/pango
+curl -Ls https://download.gnome.org/sources/pango/1.40/pango-${VERSION_PANGO}.tar.xz | tar xJC ${DEPS}/pango --strip-components=1
+cd ${DEPS}/pango
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/croco
+curl -Ls https://download.gnome.org/sources/libcroco/0.6/libcroco-${VERSION_CROCO}.tar.xz | tar xJC ${DEPS}/croco --strip-components=1
+cd ${DEPS}/croco
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/svg
+curl -Ls https://download.gnome.org/sources/librsvg/2.40/librsvg-${VERSION_SVG}.tar.xz | tar xJC ${DEPS}/svg --strip-components=1
+cd ${DEPS}/svg
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-introspection --disable-tools \
+  && make install-strip
+
+mkdir ${DEPS}/gif
+curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/giflib/giflib-${VERSION_GIF}.tar.gz | tar xzC ${DEPS}/gif --strip-components=1
+cd ${DEPS}/gif
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+mkdir ${DEPS}/vips
+curl -Ls http://www.vips.ecs.soton.ac.uk/supported/8.3/vips-${VERSION_VIPS}.tar.gz | tar xzC ${DEPS}/vips --strip-components=1
+cd ${DEPS}/vips
+./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-debug --disable-introspection --without-python --without-fftw \
+  --without-magick --without-pangoft2 --without-ppm --without-analyze --without-radiance \
+  --with-zip-includes=${TARGET}/include --with-zip-libraries=${TARGET}/lib \
+  --with-jpeg-includes=${TARGET}/include --with-jpeg-libraries=${TARGET}/lib \
+  && make install-strip
+
+# Remove the old C++ bindings
+cd ${TARGET}/include
+rm -rf vips/vipsc++.h vips/vipscpp.h
+cd ${TARGET}/lib
+rm -rf pkgconfig .libs *.la libvipsCC*
+
+# Create JSON file of version numbers
+cd ${TARGET}
+echo "{\n\
+  \"cairo\": \"${VERSION_CAIRO}\",\n\
+  \"croco\": \"${VERSION_CROCO}\",\n\
+  \"exif\": \"${VERSION_EXIF}\",\n\
+  \"ffi\": \"${VERSION_FFI}\",\n\
+  \"fontconfig\": \"${VERSION_FONTCONFIG}\",\n\
+  \"freetype\": \"${VERSION_FREETYPE}\",\n\
+  \"gdkpixbuf\": \"${VERSION_GDKPIXBUF}\",\n\
+  \"gif\": \"${VERSION_GIF}\",\n\
+  \"glib\": \"${VERSION_GLIB}\",\n\
+  \"gsf\": \"${VERSION_GSF}\",\n\
+  \"harfbuzz\": \"${VERSION_HARFBUZZ}\",\n\
+  \"jpeg\": \"${VERSION_JPEG}\",\n\
+  \"lcms\": \"${VERSION_LCMS2}\",\n\
+  \"orc\": \"${VERSION_ORC}\",\n\
+  \"pango\": \"${VERSION_PANGO}\",\n\
+  \"pixman\": \"${VERSION_PIXMAN}\",\n\
+  \"png\": \"${VERSION_PNG16}\",\n\
+  \"svg\": \"${VERSION_SVG}\",\n\
+  \"tiff\": \"${VERSION_TIFF}\",\n\
+  \"vips\": \"${VERSION_VIPS}\",\n\
+  \"webp\": \"${VERSION_WEBP}\",\n\
+  \"xml\": \"${VERSION_XML2}\",\n\
+  \"zlib\": \"${VERSION_ZLIB}\"\n\
+}" >lib/versions.json
+
+# Create .tar.gz
+GZIP=-9 tar czf /arm/libvips-${VERSION_VIPS}-arm.tar.gz include lib

packaging/build.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+VERSION_VIPS=8.3.1
+
+# Is docker available?
+
+if ! type docker >/dev/null; then
+  echo "Please install docker"
+  exit 1
+fi
+
+# TODO: docker v1.9.0 allows build-time args - https://github.com/docker/docker/pull/15182
+
+# Windows
+
+docker build -t vips-dev-win win
+WIN_CONTAINER_ID=$(docker run -d vips-dev-win)
+docker cp "${WIN_CONTAINER_ID}:/libvips-${VERSION_VIPS}-win.tar.gz" .
+docker rm "${WIN_CONTAINER_ID}"
+
+# Linux
+
+docker build -t vips-dev-lin lin
+LIN_CONTAINER_ID=$(docker run -d vips-dev-lin)
+docker cp "${LIN_CONTAINER_ID}:/libvips-${VERSION_VIPS}-lin.tar.gz" .
+docker rm "${LIN_CONTAINER_ID}"
+
+# Checksums
+
+sha256sum *.tar.gz

packaging/lin/Dockerfile

@@ -0,0 +1,221 @@
+FROM debian:wheezy
+MAINTAINER Lovell Fuller <npm@lovell.info>
+
+# Build dependencies
+RUN apt-get update && apt-get install -y build-essential autoconf libtool nasm gtk-doc-tools texinfo
+
+# Create working directories
+ENV DEPS=/deps \
+    TARGET=/target
+RUN mkdir ${DEPS} && mkdir ${TARGET}
+
+# Common build paths and flags
+ENV PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:${TARGET}/lib/pkgconfig" \
+    PATH="${PATH}:${TARGET}/bin" \
+    CPPFLAGS="-I${TARGET}/include" \
+    LDFLAGS="-L${TARGET}/lib" \
+    CFLAGS="-O3" \
+    CXXFLAGS="-O3"
+
+# Dependency version numbers
+ENV VERSION_ZLIB=1.2.8 \
+    VERSION_FFI=3.2.1 \
+    VERSION_GLIB=2.48.0 \
+    VERSION_XML2=2.9.3 \
+    VERSION_GSF=1.14.36 \
+    VERSION_EXIF=0.6.21 \
+    VERSION_LCMS2=2.7 \
+    VERSION_JPEG=1.4.90 \
+    VERSION_PNG16=1.6.21 \
+    VERSION_WEBP=0.5.0 \
+    VERSION_TIFF=4.0.6 \
+    VERSION_ORC=0.4.25 \
+    VERSION_GDKPIXBUF=2.34.0 \
+    VERSION_FREETYPE=2.6.3 \
+    VERSION_FONTCONFIG=2.11.95 \
+    VERSION_HARFBUZZ=1.2.6 \
+    VERSION_PIXMAN=0.34.0 \
+    VERSION_CAIRO=1.14.6 \
+    VERSION_PANGO=1.40.1 \
+    VERSION_CROCO=0.6.11 \
+    VERSION_SVG=2.40.15 \
+    VERSION_GIF=5.1.4 \
+    VERSION_VIPS=8.3.1
+
+# Least out-of-sync Sourceforge mirror
+ENV SOURCEFORGE_MIRROR=netix
+
+RUN mkdir ${DEPS}/zlib
+RUN curl -Ls http://zlib.net/zlib-${VERSION_ZLIB}.tar.xz | tar xJC ${DEPS}/zlib --strip-components=1
+WORKDIR ${DEPS}/zlib
+RUN ./configure --prefix=${TARGET} && make install
+RUN rm ${TARGET}/lib/libz.a
+
+RUN mkdir ${DEPS}/ffi
+RUN curl -Ls ftp://sourceware.org/pub/libffi/libffi-${VERSION_FFI}.tar.gz | tar xzC ${DEPS}/ffi --strip-components=1
+WORKDIR ${DEPS}/ffi
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --disable-builddir && make install-strip
+
+RUN mkdir ${DEPS}/glib
+RUN curl -Ls https://download.gnome.org/sources/glib/2.48/glib-${VERSION_GLIB}.tar.xz | tar xJC ${DEPS}/glib --strip-components=1
+WORKDIR ${DEPS}/glib
+RUN CFLAGS="${CFLAGS} -Wl,--default-symver" CXXFLAGS="${CXXFLAGS} -Wl,--default-symver" \
+  ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --with-pcre=internal && make install-strip
+
+RUN mkdir ${DEPS}/xml2
+RUN curl -Ls http://xmlsoft.org/sources/libxml2-${VERSION_XML2}.tar.gz | tar xzC ${DEPS}/xml2 --strip-components=1
+WORKDIR ${DEPS}/xml2
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --without-python --without-debug --without-docbook --without-ftp --without-html --without-legacy \
+  --without-pattern --without-push --without-regexps --without-schemas --without-schematron --with-zlib=${TARGET} \
+  && make install-strip
+
+RUN mkdir ${DEPS}/gsf
+RUN curl -Ls https://download.gnome.org/sources/libgsf/1.14/libgsf-${VERSION_GSF}.tar.xz | tar xJC ${DEPS}/gsf --strip-components=1
+WORKDIR ${DEPS}/gsf
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/exif
+RUN curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/libexif/libexif/${VERSION_EXIF}/libexif-${VERSION_EXIF}.tar.bz2 | tar xjC ${DEPS}/exif --strip-components=1
+WORKDIR ${DEPS}/exif
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/lcms2
+RUN curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/lcms/lcms/${VERSION_LCMS2}/lcms2-${VERSION_LCMS2}.tar.gz | tar xzC ${DEPS}/lcms2 --strip-components=1
+WORKDIR ${DEPS}/lcms2
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/jpeg
+RUN curl -Ls https://github.com/libjpeg-turbo/libjpeg-turbo/archive/${VERSION_JPEG}.tar.gz | tar xzC ${DEPS}/jpeg --strip-components=1
+WORKDIR ${DEPS}/jpeg
+RUN autoreconf -fiv && ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --with-jpeg8 --without-turbojpeg && make install-strip
+
+RUN mkdir ${DEPS}/png16
+RUN curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/libpng/libpng16/${VERSION_PNG16}/libpng-${VERSION_PNG16}.tar.xz | tar xJC ${DEPS}/png16 --strip-components=1
+WORKDIR ${DEPS}/png16
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/webp
+RUN curl -Ls http://downloads.webmproject.org/releases/webp/libwebp-${VERSION_WEBP}.tar.gz | tar xzC ${DEPS}/webp --strip-components=1
+WORKDIR ${DEPS}/webp
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/tiff
+RUN curl -Ls http://download.osgeo.org/libtiff/tiff-${VERSION_TIFF}.tar.gz | tar xzC ${DEPS}/tiff --strip-components=1
+WORKDIR ${DEPS}/tiff
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+RUN rm ${TARGET}/lib/libtiffxx*
+
+RUN mkdir ${DEPS}/orc
+RUN curl -Ls http://gstreamer.freedesktop.org/data/src/orc/orc-${VERSION_ORC}.tar.xz | tar xJC ${DEPS}/orc --strip-components=1
+WORKDIR ${DEPS}/orc
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+RUN rm ${TARGET}/lib/liborc-test-*
+
+RUN mkdir ${DEPS}/gdkpixbuf
+RUN curl -Ls https://download.gnome.org/sources/gdk-pixbuf/2.34/gdk-pixbuf-${VERSION_GDKPIXBUF}.tar.xz | tar xJC ${DEPS}/gdkpixbuf --strip-components=1
+WORKDIR ${DEPS}/gdkpixbuf
+RUN LD_LIBRARY_PATH=${TARGET}/lib ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-introspection --disable-modules --without-libpng --without-libjpeg --without-libtiff --without-gdiplus --with-included-loaders= \
+  && make install-strip
+
+RUN mkdir ${DEPS}/freetype
+RUN curl -Ls http://download.savannah.gnu.org/releases/freetype/freetype-${VERSION_FREETYPE}.tar.gz | tar xzC ${DEPS}/freetype --strip-components=1
+WORKDIR ${DEPS}/freetype
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static && make install
+
+RUN mkdir ${DEPS}/fontconfig
+RUN curl -Ls https://www.freedesktop.org/software/fontconfig/release/fontconfig-${VERSION_FONTCONFIG}.tar.bz2 | tar xjC ${DEPS}/fontconfig --strip-components=1
+WORKDIR ${DEPS}/fontconfig
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --enable-libxml2 && make install-strip
+
+RUN mkdir ${DEPS}/harfbuzz
+RUN curl -Ls https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-${VERSION_HARFBUZZ}.tar.bz2 | tar xjC ${DEPS}/harfbuzz --strip-components=1
+WORKDIR ${DEPS}/harfbuzz
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/pixman
+RUN curl -Ls http://cairographics.org/releases/pixman-${VERSION_PIXMAN}.tar.gz | tar xzC ${DEPS}/pixman --strip-components=1
+WORKDIR ${DEPS}/pixman
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking --disable-libpng && make install-strip
+
+RUN mkdir ${DEPS}/cairo
+RUN curl -Ls http://cairographics.org/releases/cairo-${VERSION_CAIRO}.tar.xz | tar xJC ${DEPS}/cairo --strip-components=1
+WORKDIR ${DEPS}/cairo
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-xlib --disable-xcb --disable-quartz --disable-win32 --disable-egl --disable-glx --disable-wgl \
+  --disable-script --disable-ps --disable-gobject --disable-trace --disable-interpreter \
+  && make install-strip
+
+RUN mkdir ${DEPS}/pango
+RUN curl -Ls https://download.gnome.org/sources/pango/1.40/pango-${VERSION_PANGO}.tar.xz | tar xJC ${DEPS}/pango --strip-components=1
+WORKDIR ${DEPS}/pango
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/croco
+RUN curl -Ls https://download.gnome.org/sources/libcroco/0.6/libcroco-${VERSION_CROCO}.tar.xz | tar xJC ${DEPS}/croco --strip-components=1
+WORKDIR ${DEPS}/croco
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/svg
+RUN curl -Ls https://download.gnome.org/sources/librsvg/2.40/librsvg-${VERSION_SVG}.tar.xz | tar xJC ${DEPS}/svg --strip-components=1
+WORKDIR ${DEPS}/svg
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-introspection --disable-tools \
+  && make install-strip
+
+RUN mkdir ${DEPS}/gif
+RUN curl -Ls http://${SOURCEFORGE_MIRROR}.dl.sourceforge.net/project/giflib/giflib-${VERSION_GIF}.tar.gz | tar xzC ${DEPS}/gif --strip-components=1
+WORKDIR ${DEPS}/gif
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking && make install-strip
+
+RUN mkdir ${DEPS}/vips
+RUN curl -Ls http://www.vips.ecs.soton.ac.uk/supported/8.3/vips-${VERSION_VIPS}.tar.gz | tar xzC ${DEPS}/vips --strip-components=1
+#RUN apt-get install -y swig gobject-introspection gettext glib2.0-dev
+#RUN curl -Ls https://github.com/jcupitt/libvips/archive/master.tar.gz | tar xzC ${DEPS}/vips --strip-components=1
+WORKDIR ${DEPS}/vips
+#RUN ./bootstrap.sh
+RUN ./configure --prefix=${TARGET} --enable-shared --disable-static --disable-dependency-tracking \
+  --disable-debug --disable-introspection --without-python --without-fftw \
+  --without-magick --without-pangoft2 --without-ppm --without-analyze --without-radiance \
+  --with-zip-includes=${TARGET}/include --with-zip-libraries=${TARGET}/lib \
+  --with-jpeg-includes=${TARGET}/include --with-jpeg-libraries=${TARGET}/lib \
+  && make install-strip
+
+# Remove the old C++ bindings
+WORKDIR ${TARGET}/include
+RUN rm -rf vips/vipsc++.h vips/vipscpp.h
+WORKDIR ${TARGET}/lib
+RUN rm -rf pkgconfig .libs *.la libvipsCC*
+
+# Create JSON file of version numbers
+WORKDIR ${TARGET}
+RUN echo "{\n\
+  \"cairo\": \"${VERSION_CAIRO}\",\n\
+  \"croco\": \"${VERSION_CROCO}\",\n\
+  \"exif\": \"${VERSION_EXIF}\",\n\
+  \"ffi\": \"${VERSION_FFI}\",\n\
+  \"fontconfig\": \"${VERSION_FONTCONFIG}\",\n\
+  \"freetype\": \"${VERSION_FREETYPE}\",\n\
+  \"gdkpixbuf\": \"${VERSION_GDKPIXBUF}\",\n\
+  \"gif\": \"${VERSION_GIF}\",\n\
+  \"glib\": \"${VERSION_GLIB}\",\n\
+  \"gsf\": \"${VERSION_GSF}\",\n\
+  \"harfbuzz\": \"${VERSION_HARFBUZZ}\",\n\
+  \"jpeg\": \"${VERSION_JPEG}\",\n\
+  \"lcms\": \"${VERSION_LCMS2}\",\n\
+  \"orc\": \"${VERSION_ORC}\",\n\
+  \"pango\": \"${VERSION_PANGO}\",\n\
+  \"pixman\": \"${VERSION_PIXMAN}\",\n\
+  \"png\": \"${VERSION_PNG16}\",\n\
+  \"svg\": \"${VERSION_SVG}\",\n\
+  \"tiff\": \"${VERSION_TIFF}\",\n\
+  \"vips\": \"${VERSION_VIPS}\",\n\
+  \"webp\": \"${VERSION_WEBP}\",\n\
+  \"xml\": \"${VERSION_XML2}\",\n\
+  \"zlib\": \"${VERSION_ZLIB}\"\n\
+}" >lib/versions.json
+
+# Create .tar.gz
+WORKDIR ${TARGET}
+RUN GZIP=-9 tar czf /libvips-${VERSION_VIPS}-lin.tar.gz include lib

packaging/test.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Verify docker is available
+if ! type docker >/dev/null; then
+  echo "Please install docker"
+  exit 1
+fi
+
+version_node=4.4.2
+
+test="npm run clean; npm install --unsafe-perm; npm test"
+
+# Debian 7, 8
+# Ubuntu 14.04
+for dist in wheezy jessie trusty; do
+  echo "Testing $dist..."
+  if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/$dist:$version_node >packaging/$dist.log 2>&1 sh -c "cd /v; ./packaging/test/debian.sh; $test";
+  then echo "$dist OK"
+  else echo "$dist fail" && cat packaging/$dist.log
+  fi
+done
+
+# Centos 7
+echo "Testing centos7..."
+if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/centos7:$version_node >packaging/$dist.log 2>&1 sh -c "cd /v; $test";
+then echo "$dist OK"
+else echo "$dist fail" && cat packaging/$dist.log
+fi
+
+# Fedora 22
+echo "Testing fedora22..."
+if docker run -i -t --rm -v $PWD:/v -e "NODE_ENV=development" nodesource/fedora22:$version_node >packaging/$dist.log 2>&1 sh -c "cd /v; $test";
+then echo "$dist OK"
+else echo "$dist fail" && cat packaging/$dist.log
+fi
+
+# openSUSE 13.2
+echo "Testing opensuse..."
+if docker run -i -t --rm -v $PWD:/v opensuse:13.2 >packaging/opensuse.log 2>&1 /bin/sh -c "cd /v; ./packaging/test/opensuse.sh; $test";
+then echo "opensuse OK"
+else echo "opensuse fail" && cat packaging/opensuse.log
+fi
+
+# Archlinux 2015.06.01
+echo "Testing archlinux..."
+if docker run -i -t --rm -v $PWD:/v base/archlinux:2015.06.01 >packaging/archlinux.log 2>&1 sh -c "cd /v; ./packaging/test/archlinux.sh; $test";
+then echo "archlinux OK"
+else echo "archlinux fail" && cat packaging/archlinux.log
+fi
+
+# Alpine
+echo "Testing alpine..."
+if docker run -i -t --rm -v $PWD:/v -e "SHARP_TEST_WITHOUT_CACHE=0" alpine:edge >packaging/alpine.log 2>&1 sh -c "cd /v; ./packaging/test/alpine.sh; $test";
+then echo "alpine OK"
+else echo "alpine fail" && cat packaging/alpine.log
+fi

packaging/test/alpine.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Install build dependencies
+apk add --update make gcc g++ python nodejs
+
+# Install libvips with build headers and dependencies
+apk add libvips-dev --update --repository https://s3.amazonaws.com/wjordan-apk --allow-untrusted

packaging/test/archlinux.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# Install Node.js on Archlinux
+pacman -Sy --noconfirm gcc make python2 nodejs npm | cat
+ln -s /usr/bin/python2 /usr/bin/python

packaging/test/debian.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+# Install pkg-config on Debian/Ubuntu
+apt-get update
+apt-get install -y pkg-config

packaging/test/opensuse.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Install Node.js on openSUSE 13.2
+zypper addrepo http://download.opensuse.org/repositories/devel:languages:nodejs/openSUSE_13.2/devel:languages:nodejs.repo
+zypper --gpg-auto-import-keys refresh
+zypper --non-interactive install gcc-c++ make nodejs-devel npm
+npm install -g npm

packaging/win/Dockerfile

@@ -0,0 +1,20 @@
+FROM debian:wheezy
+MAINTAINER Lovell Fuller <npm@lovell.info>
+
+RUN apt-get update && apt-get install -y curl zip
+
+ENV VERSION_VIPS=8.3.1
+
+# Fetch and unzip
+RUN mkdir /vips
+WORKDIR /vips
+RUN curl -L -O https://github.com/lovell/build-win64/releases/download/v${VERSION_VIPS}/vips-dev-w64-web-${VERSION_VIPS}.zip
+RUN unzip vips-dev-w64-web-${VERSION_VIPS}.zip
+
+# Clean and zip
+WORKDIR /vips/vips-dev-8.3
+RUN rm bin/libvipsCC-42.dll bin/libvips-cpp-42.dll bin/libgsf-win32-1-114.dll
+RUN cp bin/*.dll lib/
+RUN cp -r lib64/* lib/
+
+RUN GZIP=-9 tar czf /libvips-${VERSION_VIPS}-win.tar.gz include lib/glib-2.0 lib/libvips.lib lib/libglib-2.0.lib lib/libgobject-2.0.lib lib/*.dll

preinstall.sh

@@ -1,19 +1,19 @@
 #!/bin/sh
 
-# Ensures libvips is installed and attempts to install it if not
-# Currently supports:
-# * Debian Linux
-#   * Debian 7, 8
-#   * Ubuntu 12.04, 14.04, 14.10, 15.04
-#   * Mint 13, 17
-# * Red Hat Linux
-#   * RHEL/Centos/Scientific 6, 7
-#   * Fedora 21, 22
-#   * Amazon Linux 2014.09, 2015.03
+# Use of this script is deprecated
 
-vips_version_minimum=7.40.0
-vips_version_latest_major_minor=8.0
-vips_version_latest_patch=2
+echo
+echo "WARNING: This script is no longer required on most 64-bit Linux systems when using sharp v0.12.0+"
+echo
+echo "See http://sharp.dimens.io/page/install#linux"
+echo
+echo "If you really, really need this script, it will attempt"
+echo "to globally install libvips if not already available."
+echo
+
+vips_version_minimum=8.3.1
+vips_version_latest_major_minor=8.3
+vips_version_latest_patch=1
 
 openslide_version_minimum=3.4.0
 openslide_version_latest_major_minor=3.4
@@ -24,14 +24,14 @@ install_libvips_from_source() {
   curl -O http://www.vips.ecs.soton.ac.uk/supported/$vips_version_latest_major_minor/vips-$vips_version_latest_major_minor.$vips_version_latest_patch.tar.gz
   tar zvxf vips-$vips_version_latest_major_minor.$vips_version_latest_patch.tar.gz
   cd vips-$vips_version_latest_major_minor.$vips_version_latest_patch
-  ./configure --disable-debug --disable-docs --disable-static --disable-introspection --enable-cxx=yes --without-python --without-orc --without-fftw $1
+  CXXFLAGS="-D_GLIBCXX_USE_CXX11_ABI=0" ./configure --disable-debug --disable-docs --disable-static --disable-introspection --disable-dependency-tracking --enable-cxx=yes --without-python --without-orc --without-fftw $1
   make
   make install
   cd ..
   rm -rf vips-$vips_version_latest_major_minor.$vips_version_latest_patch
   rm vips-$vips_version_latest_major_minor.$vips_version_latest_patch.tar.gz
   ldconfig
-  echo "Installed libvips $vips_version_latest_major_minor.$vips_version_latest_patch"
+  echo "Installed libvips $(PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig pkg-config --modversion vips)"
 }
 
 install_libopenslide_from_source() {
@@ -117,6 +117,11 @@ if [ "$(id -u)" -ne "0" ]; then
   exit 1
 fi
 
+# Deprecation warning
+if [ "$(arch)" == "x86_64" ]; then
+  echo "This script is no longer required on most 64-bit Linux systems when using sharp v0.12.0+"
+fi
+
 # OS-specific installations of libopenslide follows
 # Either openslide does not exist, or vips is installed without openslide support
 if [ $enable_openslide -eq 1 ] && [ -z $vips_with_openslide ] && [ $openslide_exists -eq 0 ]; then
@@ -125,12 +130,12 @@ if [ $enable_openslide -eq 1 ] && [ -z $vips_with_openslide ] && [ $openslide_ex
     DISTRO=$(lsb_release -c -s)
     echo "Detected Debian Linux '$DISTRO'"
     case "$DISTRO" in
-      jessie|vivid)
+      jessie|vivid|wily|xenial)
         # Debian 8, Ubuntu 15
         echo "Installing libopenslide via apt-get"
         apt-get install -y libopenslide-dev
         ;;
-      trusty|utopic|qiana|rebecca|rafaela)
+      trusty|utopic|qiana|rebecca|rafaela|freya)
         # Ubuntu 14, Mint 17
         echo "Installing libopenslide dependencies via apt-get"
         apt-get install -y automake build-essential curl zlib1g-dev libopenjpeg-dev libpng12-dev libjpeg-dev libtiff5-dev libgdk-pixbuf2.0-dev libxml2-dev libsqlite3-dev libcairo2-dev libglib2.0-dev sqlite3 libsqlite3-dev
@@ -209,18 +214,8 @@ if [ -f /etc/debian_version ]; then
   DISTRO=$(lsb_release -c -s)
   echo "Detected Debian Linux '$DISTRO'"
   case "$DISTRO" in
-    jessie|vivid)
-      # Debian 8, Ubuntu 15
-      if [ $enable_openslide -eq 1 ]; then
-        echo "Recompiling vips with openslide support"
-        install_libvips_from_source
-      else
-        echo "Installing libvips via apt-get"
-        apt-get install -y libvips-dev libgsf-1-dev
-      fi
-      ;;
-    trusty|utopic|qiana|rebecca|rafaela)
-      # Ubuntu 14, Mint 17
+    jessie|trusty|utopic|vivid|wily|xenial|qiana|rebecca|rafaela|freya)
+      # Debian 8, Ubuntu 14.04+, Mint 17
       echo "Installing libvips dependencies via apt-get"
       apt-get install -y automake build-essential gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg-dev libpng12-dev libwebp-dev libtiff5-dev libexif-dev libgsf-1-dev liblcms2-dev libxml2-dev swig libmagickcore-dev curl
       install_libvips_from_source
@@ -247,32 +242,26 @@ elif [ -f /etc/redhat-release ]; then
       # RHEL/CentOS 7
       echo "Installing libvips dependencies via yum"
       yum groupinstall -y "Development Tools"
-      yum install -y gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms-devel ImageMagick-devel gobject-introspection-devel libwebp-devel curl
+      yum install -y tar curl gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms2-devel ImageMagick-devel gobject-introspection-devel libwebp-devel
       install_libvips_from_source "--prefix=/usr"
       ;;
     "Red Hat Enterprise Linux release 6."*|"CentOS release 6."*|"Scientific Linux release 6."*)
       # RHEL/CentOS 6
       echo "Installing libvips dependencies via yum"
       yum groupinstall -y "Development Tools"
-      yum install -y gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms-devel ImageMagick-devel curl
+      yum install -y tar curl gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms-devel ImageMagick-devel
       yum install -y http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm
       yum install -y --enablerepo=nux-dextop gobject-introspection-devel
       yum install -y http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
       yum install -y --enablerepo=remi libwebp-devel
       install_libvips_from_source "--prefix=/usr"
       ;;
-    "Fedora release 21 "*|"Fedora release 22 "*)
-      # Fedora 21, 22
-      if [ $enable_openslide -eq 1 ]; then
-        echo "Installing libvips dependencies via yum"
-        yum groupinstall -y "Development Tools"
-        yum install -y gcc-c++ gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel lcms-devel ImageMagick-devel gobject-introspection-devel libwebp-devel curl
-        echo "Compiling vips with openslide support"
-        install_libvips_from_source "--prefix=/usr"
-      else
-        echo "Installing libvips via yum"
-        yum install -y vips-devel
-      fi
+    "Fedora"*)
+      # Fedora 21, 22, 23
+      echo "Installing libvips dependencies via yum"
+      yum groupinstall -y "Development Tools"
+      yum install -y gcc-c++ gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel lcms-devel ImageMagick-devel gobject-introspection-devel libwebp-devel curl
+      install_libvips_from_source "--prefix=/usr"
       ;;
     *)
       # Unsupported RHEL-based OS
@@ -283,12 +272,12 @@ elif [ -f /etc/system-release ]; then
   # Probably Amazon Linux
   RELEASE=$(cat /etc/system-release)
   case $RELEASE in
-    "Amazon Linux AMI release 2014.09"|"Amazon Linux AMI release 2015.03")
+    "Amazon Linux AMI release 2015.03"|"Amazon Linux AMI release 2015.09")
       # Amazon Linux
       echo "Detected '$RELEASE'"
       echo "Installing libvips dependencies via yum"
       yum groupinstall -y "Development Tools"
-      yum install -y gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms-devel ImageMagick-devel gobject-introspection-devel libwebp-devel curl
+      yum install -y gtk-doc libxml2-devel libjpeg-turbo-devel libpng-devel libtiff-devel libexif-devel libgsf-devel lcms2-devel ImageMagick-devel gobject-introspection-devel libwebp-devel curl
       install_libvips_from_source "--prefix=/usr"
       ;;
     *)

src/common.cc

@@ -1,32 +1,30 @@
 #include <cstdlib>
 #include <string>
 #include <string.h>
-#include <vips/vips.h>
+#include <vips/vips8>
 
 #include "common.h"
 
 // Verify platform and compiler compatibility
 
-#if (VIPS_MAJOR_VERSION < 7 || (VIPS_MAJOR_VERSION == 7 && VIPS_MINOR_VERSION < 40))
-#error libvips version 7.40.0+ required - see http://sharp.dimens.io/page/install
-#endif
-
-#ifdef _WIN64
-#error Windows 64-bit is currently unsupported - see http://sharp.dimens.io/page/install#windows
+#if (VIPS_MAJOR_VERSION < 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 2))
+#error libvips version 8.2.0+ required - see sharp.dimens.io/page/install
 #endif
 
 #if ((!defined(__clang__)) && defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)))
-#error GCC version 4.6+ is required for C++11 features - see http://sharp.dimens.io/page/install#prerequisites
+#error GCC version 4.6+ is required for C++11 features - see sharp.dimens.io/page/install#prerequisites
 #endif
 
 #if (defined(__clang__) && defined(__has_feature))
 #if (!__has_feature(cxx_range_for))
-#error clang version 3.0+ is required for C++11 features - see http://sharp.dimens.io/page/install#prerequisites
+#error clang version 3.0+ is required for C++11 features - see sharp.dimens.io/page/install#prerequisites
 #endif
 #endif
 
 #define EXIF_IFD0_ORIENTATION "exif-ifd0-Orientation"
 
+using vips::VImage;
+
 namespace sharp {
 
   // How many tasks are in the queue?
@@ -54,6 +52,36 @@ namespace sharp {
   bool IsDz(std::string const &str) {
     return EndsWith(str, ".dzi") || EndsWith(str, ".DZI");
   }
+  bool IsDzZip(std::string const &str) {
+    return EndsWith(str, ".zip") || EndsWith(str, ".ZIP") || EndsWith(str, ".szi") || EndsWith(str, ".SZI");
+  }
+  bool IsV(std::string const &str) {
+    return EndsWith(str, ".v") || EndsWith(str, ".V") || EndsWith(str, ".vips") || EndsWith(str, ".VIPS");
+  }
+
+  /*
+    Provide a string identifier for the given image type.
+  */
+  std::string ImageTypeId(ImageType const imageType) {
+    std::string id;
+    switch (imageType) {
+      case ImageType::JPEG: id = "jpeg"; break;
+      case ImageType::PNG: id = "png"; break;
+      case ImageType::WEBP: id = "webp"; break;
+      case ImageType::TIFF: id = "tiff"; break;
+      case ImageType::GIF: id = "gif"; break;
+      case ImageType::SVG: id = "svg"; break;
+      case ImageType::PDF: id = "pdf"; break;
+      case ImageType::MAGICK: id = "magick"; break;
+      case ImageType::OPENSLIDE: id = "openslide"; break;
+      case ImageType::PPM: id = "ppm"; break;
+      case ImageType::FITS: id = "fits"; break;
+      case ImageType::VIPS: id = "v"; break;
+      case ImageType::RAW: id = "raw"; break;
+      case ImageType::UNKNOWN: id = "unknown"; break;
+    }
+    return id;
+  }
 
   /*
     Determine image format of a buffer.
@@ -62,7 +90,7 @@ namespace sharp {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load_buffer(buffer, length);
     if (load != NULL) {
-      std::string loader = load;
+      std::string const loader = load;
       if (EndsWith(loader, "JpegBuffer")) {
         imageType = ImageType::JPEG;
       } else if (EndsWith(loader, "PngBuffer")) {
@@ -71,6 +99,12 @@ namespace sharp {
         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, "PdfBuffer")) {
+        imageType = ImageType::PDF;
       } else if (EndsWith(loader, "MagickBuffer")) {
         imageType = ImageType::MAGICK;
       }
@@ -78,21 +112,14 @@ namespace sharp {
     return imageType;
   }
 
-  /*
-    Initialise and return a VipsImage from a buffer. Supports JPEG, PNG, WebP and TIFF.
-  */
-  VipsImage* InitImage(void *buffer, size_t const length, VipsAccess const access) {
-    return vips_image_new_from_buffer(buffer, length, NULL, "access", access, NULL);
-  }
-
   /*
     Determine image format, reads the first few bytes of the file
   */
   ImageType DetermineImageType(char const *file) {
     ImageType imageType = ImageType::UNKNOWN;
     char const *load = vips_foreign_find_load(file);
-    if (load != NULL) {
-      std::string loader = load;
+    if (load != nullptr) {
+      std::string const loader = load;
       if (EndsWith(loader, "JpegFile")) {
         imageType = ImageType::JPEG;
       } else if (EndsWith(loader, "Png")) {
@@ -103,6 +130,18 @@ namespace sharp {
         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, "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;
       }
@@ -110,43 +149,37 @@ namespace sharp {
     return imageType;
   }
 
-  /*
-    Initialise and return a VipsImage from a file.
-  */
-  VipsImage* InitImage(char const *file, VipsAccess const access) {
-    return vips_image_new_from_file(file, "access", access, NULL);
-  }
-
   /*
     Does this image have an embedded profile?
   */
-  bool HasProfile(VipsImage *image) {
-    return (vips_image_get_typeof(image, VIPS_META_ICC_NAME) > 0) ? TRUE : FALSE;
+  bool HasProfile(VImage image) {
+    return (image.get_typeof(VIPS_META_ICC_NAME) != 0) ? TRUE : FALSE;
   }
 
   /*
     Does this image have an alpha channel?
     Uses colour space interpretation with number of channels to guess this.
   */
-  bool HasAlpha(VipsImage *image) {
+  bool HasAlpha(VImage image) {
+    int const bands = image.bands();
+    VipsInterpretation const interpretation = image.interpretation();
     return (
-      (image->Bands == 2 && image->Type == VIPS_INTERPRETATION_B_W) ||
-      (image->Bands == 4 && image->Type != VIPS_INTERPRETATION_CMYK) ||
-      (image->Bands == 5 && image->Type == VIPS_INTERPRETATION_CMYK)
+      (bands == 2 && interpretation == VIPS_INTERPRETATION_B_W) ||
+      (bands == 4 && interpretation != VIPS_INTERPRETATION_CMYK) ||
+      (bands == 5 && interpretation == VIPS_INTERPRETATION_CMYK)
     );
   }
 
   /*
     Get EXIF Orientation of image, if any.
   */
-  int ExifOrientation(VipsImage const *image) {
+  int ExifOrientation(VImage image) {
     int orientation = 0;
-    const char *exif;
-    if (
-      vips_image_get_typeof(image, EXIF_IFD0_ORIENTATION) != 0 &&
-      !vips_image_get_string(image, EXIF_IFD0_ORIENTATION, &exif)
-    ) {
-      orientation = atoi(&exif[0]);
+    if (image.get_typeof(EXIF_IFD0_ORIENTATION) != 0) {
+      char const *exif = image.get_string(EXIF_IFD0_ORIENTATION);
+      if (exif != nullptr) {
+        orientation = atoi(&exif[0]);
+      }
     }
     return orientation;
   }
@@ -154,31 +187,159 @@ namespace sharp {
   /*
     Set EXIF Orientation of image.
   */
-  void SetExifOrientation(VipsImage *image, int const orientation) {
+  void SetExifOrientation(VImage image, int const orientation) {
     char exif[3];
     g_snprintf(exif, sizeof(exif), "%d", orientation);
-    vips_image_set_string(image, EXIF_IFD0_ORIENTATION, exif);
+    image.set(EXIF_IFD0_ORIENTATION, exif);
   }
 
   /*
     Remove EXIF Orientation from image.
   */
-  void RemoveExifOrientation(VipsImage *image) {
+  void RemoveExifOrientation(VImage image) {
     SetExifOrientation(image, 0);
   }
 
   /*
-    Returns the window size for the named interpolator. For example,
-    a window size of 3 means a 3x3 pixel grid is used for the calculation.
+    Does this image have a non-default density?
   */
-  int InterpolatorWindowSize(char const *name) {
-    VipsInterpolate *interpolator = vips_interpolate_new(name);
-    if (interpolator == NULL) {
-      return -1;
-    }
-    int window_size = vips_interpolate_get_window_size(interpolator);
-    g_object_unref(interpolator);
-    return window_size;
+  bool HasDensity(VImage image) {
+    return image.xres() > 1.0;
   }
 
-} // namespace sharp
+  /*
+    Get pixels/mm resolution as pixels/inch density.
+  */
+  int GetDensity(VImage image) {
+    return static_cast<int>(round(image.xres() * 25.4));
+  }
+
+  /*
+    Set pixels/mm resolution based on a pixels/inch density.
+  */
+  void SetDensity(VImage image, const int density) {
+    const double pixelsPerMm = static_cast<double>(density) / 25.4;
+    image.set("Xres", pixelsPerMm);
+    image.set("Yres", pixelsPerMm);
+    image.set(VIPS_META_RESOLUTION_UNIT, "in");
+  }
+
+  /*
+    Called when a Buffer undergoes GC, required to support mixed runtime libraries in Windows
+  */
+  void FreeCallback(char* data, void* hint) {
+    if (data != nullptr) {
+      g_free(data);
+    }
+  }
+
+  /*
+    Calculate the (left, top) coordinates of the output image
+    within the input image, applying the given gravity.
+  */
+  std::tuple<int, int> CalculateCrop(int const inWidth, int const inHeight,
+    int const outWidth, int const outHeight, int const gravity) {
+
+    int left = 0;
+    int top = 0;
+    switch (gravity) {
+      case 1:
+        // North
+        left = (inWidth - outWidth + 1) / 2;
+        break;
+      case 2:
+        // East
+        left = inWidth - outWidth;
+        top = (inHeight - outHeight + 1) / 2;
+        break;
+      case 3:
+        // South
+        left = (inWidth - outWidth + 1) / 2;
+        top = inHeight - outHeight;
+        break;
+      case 4:
+        // West
+        top = (inHeight - outHeight + 1) / 2;
+        break;
+      case 5:
+        // Northeast
+        left = inWidth - outWidth;
+        break;
+      case 6:
+        // Southeast
+        left = inWidth - outWidth;
+        top = inHeight - outHeight;
+      case 7:
+        // Southwest
+        top = inHeight - outHeight;
+      case 8:
+        // Northwest
+        break;
+      default:
+        // Centre
+        left = (inWidth - outWidth + 1) / 2;
+        top = (inHeight - outHeight + 1) / 2;
+    }
+    return std::make_tuple(left, top);
+  }
+
+  /*
+    Calculate the (left, top) coordinates of the output image
+    within the input image, applying the given x and y offsets.
+  */
+  std::tuple<int, int> CalculateCrop(int const inWidth, int const inHeight,
+    int const outWidth, int const outHeight, int const x, int const y) {
+
+    // default values
+    int left = 0;
+    int top = 0;
+
+    // assign only if valid
+    if(x >= 0 && x < (inWidth - outWidth)) {
+      left = x;
+    } else if(x >= (inWidth - outWidth)) {
+      left = inWidth - outWidth;
+    }
+
+    if(y >= 0 && y < (inHeight - outHeight)) {
+      top = y;
+    } else if(x >= (inHeight - outHeight)) {
+      top = inHeight - outHeight;
+    }
+
+    // the resulting left and top could have been outside the image after calculation from bottom/right edges
+    if(left < 0) {
+      left = 0;
+    }
+    if(top < 0) {
+      top = 0;
+    }
+
+    return std::make_tuple(left, top);
+  }
+
+  /*
+    Are pixel values in this image 16-bit integer?
+  */
+  bool Is16Bit(VipsInterpretation const interpretation) {
+    return interpretation == VIPS_INTERPRETATION_RGB16 || interpretation == VIPS_INTERPRETATION_GREY16;
+  }
+
+  /*
+    Return the image alpha maximum. Useful for combining alpha bands. scRGB
+    images are 0 - 1 for image data, but the alpha is 0 - 255.
+  */
+  double MaximumImageAlpha(VipsInterpretation const interpretation) {
+    return Is16Bit(interpretation) ? 65535.0 : 255.0;
+  }
+
+  /*
+    Get boolean operation type from string
+  */
+  VipsOperationBoolean GetBooleanOperation(std::string const opStr) {
+    return static_cast<VipsOperationBoolean>(
+      vips_enum_from_nick(nullptr, VIPS_TYPE_OPERATION_BOOLEAN, opStr.data())
+    );
+  }
+
+}  // namespace sharp

src/common.h

@@ -2,17 +2,29 @@
 #define SRC_COMMON_H_
 
 #include <string>
+#include <tuple>
+
+#include <vips/vips8>
+
+using vips::VImage;
 
 namespace sharp {
 
   enum class ImageType {
-    UNKNOWN,
     JPEG,
     PNG,
     WEBP,
     TIFF,
+    GIF,
+    SVG,
+    PDF,
     MAGICK,
-    OPENSLIDE
+    OPENSLIDE,
+    PPM,
+    FITS,
+    VIPS,
+    RAW,
+    UNKNOWN
   };
 
   // How many tasks are in the queue?
@@ -27,6 +39,13 @@ namespace sharp {
   bool IsWebp(std::string const &str);
   bool IsTiff(std::string const &str);
   bool IsDz(std::string const &str);
+  bool IsDzZip(std::string const &str);
+  bool IsV(std::string const &str);
+
+  /*
+    Provide a string identifier for the given image type.
+  */
+  std::string ImageTypeId(ImageType const imageType);
 
   /*
     Determine image format of a buffer.
@@ -38,47 +57,81 @@ namespace sharp {
   */
   ImageType DetermineImageType(char const *file);
 
-  /*
-    Initialise and return a VipsImage from a buffer. Supports JPEG, PNG, WebP and TIFF.
-  */
-  VipsImage* InitImage(void *buffer, size_t const length, VipsAccess const access);
-
-  /*
-    Initialise and return a VipsImage from a file.
-  */
-  VipsImage* InitImage(char const *file, VipsAccess const access);
-
   /*
     Does this image have an embedded profile?
   */
-  bool HasProfile(VipsImage *image);
+  bool HasProfile(VImage image);
 
   /*
     Does this image have an alpha channel?
     Uses colour space interpretation with number of channels to guess this.
   */
-  bool HasAlpha(VipsImage *image);
+  bool HasAlpha(VImage image);
 
   /*
     Get EXIF Orientation of image, if any.
   */
-  int ExifOrientation(VipsImage const *image);
+  int ExifOrientation(VImage image);
 
   /*
     Set EXIF Orientation of image.
   */
-  void SetExifOrientation(VipsImage *image, int const orientation);
+  void SetExifOrientation(VImage image, int const orientation);
 
   /*
     Remove EXIF Orientation from image.
   */
-  void RemoveExifOrientation(VipsImage *image);
+  void RemoveExifOrientation(VImage image);
 
   /*
-    Returns the window size for the named interpolator. For example,
-    a window size of 3 means a 3x3 pixel grid is used for the calculation.
+    Does this image have a non-default density?
   */
-  int InterpolatorWindowSize(char const *name);
+  bool HasDensity(VImage image);
+
+  /*
+    Get pixels/mm resolution as pixels/inch density.
+  */
+  int GetDensity(VImage image);
+
+  /*
+    Set pixels/mm resolution based on a pixels/inch density.
+  */
+  void SetDensity(VImage image, const int density);
+
+  /*
+    Called when a Buffer undergoes GC, required to support mixed runtime libraries in Windows
+  */
+  void FreeCallback(char* data, void* hint);
+
+  /*
+    Calculate the (left, top) coordinates of the output image
+    within the input image, applying the given gravity.
+  */
+  std::tuple<int, int> CalculateCrop(int const inWidth, int const inHeight,
+    int const outWidth, int const outHeight, int const gravity);
+
+  /*
+    Calculate the (left, top) coordinates of the output image
+    within the input image, applying the given x and y offsets of the output image.
+  */
+  std::tuple<int, int> CalculateCrop(int const inWidth, int const inHeight,
+    int const outWidth, int const outHeight, int const x, int const y);
+
+  /*
+    Are pixel values in this image 16-bit integer?
+  */
+  bool Is16Bit(VipsInterpretation const interpretation);
+
+  /*
+    Return the image alpha maximum. Useful for combining alpha bands. scRGB
+    images are 0 - 1 for image data, but the alpha is 0 - 255.
+  */
+  double MaximumImageAlpha(VipsInterpretation const interpretation);
+
+  /*
+    Get boolean operation type from string
+  */
+  VipsOperationBoolean GetBooleanOperation(std::string const opStr);
 
 }  // namespace sharp
 

src/libvips/cplusplus/VError.cpp

@@ -0,0 +1,52 @@
+// Code for error type
+
+/*
+
+    Copyright (C) 1991-2001 The National Gallery
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /*HAVE_CONFIG_H*/
+#include <vips/intl.h>
+
+#include <iostream>
+
+#include <vips/vips8>
+
+VIPS_NAMESPACE_START
+
+std::ostream &operator<<( std::ostream &file, const VError &err )
+{
+	err.ostream_print( file );
+	return( file );
+}
+
+void VError::ostream_print( std::ostream &file ) const
+{
+	file << _what;
+}
+
+VIPS_NAMESPACE_END

src/libvips/cplusplus/VInterpolate.cpp

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

src/metadata.cc

@@ -1,5 +1,5 @@
 #include <node.h>
-#include <vips/vips.h>
+#include <vips/vips8>
 
 #include "nan.h"
 
@@ -29,12 +29,18 @@ using Nan::NewBuffer;
 using Nan::Null;
 using Nan::Error;
 
+using vips::VImage;
+using vips::VError;
+
 using sharp::ImageType;
+using sharp::ImageTypeId;
 using sharp::DetermineImageType;
-using sharp::InitImage;
 using sharp::HasProfile;
 using sharp::HasAlpha;
 using sharp::ExifOrientation;
+using sharp::HasDensity;
+using sharp::GetDensity;
+using sharp::FreeCallback;
 using sharp::counterQueue;
 
 struct MetadataBaton {
@@ -48,6 +54,7 @@ struct MetadataBaton {
   int height;
   std::string space;
   int channels;
+  int density;
   bool hasProfile;
   bool hasAlpha;
   int orientation;
@@ -59,25 +66,20 @@ struct MetadataBaton {
 
   MetadataBaton():
     bufferInLength(0),
+    density(0),
     orientation(0),
     exifLength(0),
     iccLength(0) {}
 };
 
-/*
-  Delete input char[] buffer and notify V8 of memory deallocation
-  Used as the callback function for the "postclose" signal
-*/
-static void DeleteBuffer(VipsObject *object, char *buffer) {
-  if (buffer != NULL) {
-    delete[] buffer;
-  }
-}
-
 class MetadataWorker : public AsyncWorker {
-
  public:
-  MetadataWorker(Callback *callback, MetadataBaton *baton) : AsyncWorker(callback), baton(baton) {}
+  MetadataWorker(Callback *callback, MetadataBaton *baton, const Local<Object> &bufferIn) :
+    AsyncWorker(callback), baton(baton) {
+      if (baton->bufferInLength > 0) {
+        SaveToPersistent("bufferIn", bufferIn);
+      }
+    }
   ~MetadataWorker() {}
 
   void Execute() {
@@ -85,79 +87,65 @@ class MetadataWorker : public AsyncWorker {
     g_atomic_int_dec_and_test(&counterQueue);
 
     ImageType imageType = ImageType::UNKNOWN;
-    VipsImage *image = NULL;
+    VImage image;
     if (baton->bufferInLength > 0) {
       // From buffer
       imageType = DetermineImageType(baton->bufferIn, baton->bufferInLength);
       if (imageType != ImageType::UNKNOWN) {
-        image = InitImage(baton->bufferIn, baton->bufferInLength, VIPS_ACCESS_RANDOM);
-        if (image != NULL) {
-          // Listen for "postclose" signal to delete input buffer
-          g_signal_connect(image, "postclose", G_CALLBACK(DeleteBuffer), baton->bufferIn);
-        } else {
+        try {
+          image = VImage::new_from_buffer(baton->bufferIn, baton->bufferInLength, nullptr);
+        } catch (...) {
           (baton->err).append("Input buffer has corrupt header");
           imageType = ImageType::UNKNOWN;
-          DeleteBuffer(NULL, baton->bufferIn);
         }
       } else {
         (baton->err).append("Input buffer contains unsupported image format");
-        DeleteBuffer(NULL, baton->bufferIn);
       }
     } else {
       // From file
-      imageType = DetermineImageType(baton->fileIn.c_str());
+      imageType = DetermineImageType(baton->fileIn.data());
       if (imageType != ImageType::UNKNOWN) {
-        image = InitImage(baton->fileIn.c_str(), VIPS_ACCESS_RANDOM);
-        if (image == NULL) {
+        try {
+          image = VImage::new_from_file(baton->fileIn.data());
+        } catch (...) {
           (baton->err).append("Input file has corrupt header");
           imageType = ImageType::UNKNOWN;
         }
       } else {
-        (baton->err).append("Input file is of an unsupported image format");
+        (baton->err).append("Input file is missing or of an unsupported image format");
       }
     }
-    if (image != NULL && imageType != ImageType::UNKNOWN) {
+    if (imageType != ImageType::UNKNOWN) {
       // Image type
-      switch (imageType) {
-        case ImageType::JPEG: baton->format = "jpeg"; break;
-        case ImageType::PNG: baton->format = "png"; break;
-        case ImageType::WEBP: baton->format = "webp"; break;
-        case ImageType::TIFF: baton->format = "tiff"; break;
-        case ImageType::MAGICK: baton->format = "magick"; break;
-        case ImageType::OPENSLIDE: baton->format = "openslide"; break;
-        case ImageType::UNKNOWN: break;
-      }
+      baton->format = ImageTypeId(imageType);
       // VipsImage attributes
-      baton->width = image->Xsize;
-      baton->height = image->Ysize;
-      baton->space = vips_enum_nick(VIPS_TYPE_INTERPRETATION, image->Type);
-      baton->channels = image->Bands;
+      baton->width = image.width();
+      baton->height = image.height();
+      baton->space = vips_enum_nick(VIPS_TYPE_INTERPRETATION, image.interpretation());
+      baton->channels = image.bands();
+      if (HasDensity(image)) {
+        baton->density = GetDensity(image);
+      }
       baton->hasProfile = HasProfile(image);
       // Derived attributes
       baton->hasAlpha = HasAlpha(image);
       baton->orientation = ExifOrientation(image);
       // EXIF
-      if (vips_image_get_typeof(image, VIPS_META_EXIF_NAME) == VIPS_TYPE_BLOB) {
-        void* exif;
+      if (image.get_typeof(VIPS_META_EXIF_NAME) == VIPS_TYPE_BLOB) {
         size_t exifLength;
-        if (!vips_image_get_blob(image, VIPS_META_EXIF_NAME, &exif, &exifLength)) {
-          baton->exifLength = exifLength;
-          baton->exif = static_cast<char*>(malloc(exifLength));
-          memcpy(baton->exif, exif, exifLength);
-        }
+        void const *exif = image.get_blob(VIPS_META_EXIF_NAME, &exifLength);
+        baton->exif = static_cast<char*>(g_malloc(exifLength));
+        memcpy(baton->exif, exif, exifLength);
+        baton->exifLength = exifLength;
       }
       // ICC profile
-      if (vips_image_get_typeof(image, VIPS_META_ICC_NAME) == VIPS_TYPE_BLOB) {
-        void* icc;
+      if (image.get_typeof(VIPS_META_ICC_NAME) == VIPS_TYPE_BLOB) {
         size_t iccLength;
-        if (!vips_image_get_blob(image, VIPS_META_ICC_NAME, &icc, &iccLength)) {
-          baton->iccLength = iccLength;
-          baton->icc = static_cast<char*>(malloc(iccLength));
-          memcpy(baton->icc, icc, iccLength);
-        }
+        void const *icc = image.get_blob(VIPS_META_ICC_NAME, &iccLength);
+        baton->icc = static_cast<char*>(g_malloc(iccLength));
+        memcpy(baton->icc, icc, iccLength);
+        baton->iccLength = iccLength;
       }
-      // Drop image reference
-      g_object_unref(image);
     }
     // Clean up
     vips_error_clear();
@@ -170,7 +158,7 @@ class MetadataWorker : public AsyncWorker {
     Local<Value> argv[2] = { Null(), Null() };
     if (!baton->err.empty()) {
       // Error
-      argv[0] = Error(baton->err.c_str());
+      argv[0] = Error(baton->err.data());
     } else {
       // Metadata Object
       Local<Object> info = New<Object>();
@@ -179,19 +167,33 @@ class MetadataWorker : public AsyncWorker {
       Set(info, New("height").ToLocalChecked(), New<Number>(baton->height));
       Set(info, New("space").ToLocalChecked(), New<String>(baton->space).ToLocalChecked());
       Set(info, New("channels").ToLocalChecked(), New<Number>(baton->channels));
+      if (baton->density > 0) {
+        Set(info, New("density").ToLocalChecked(), New<Number>(baton->density));
+      }
       Set(info, New("hasProfile").ToLocalChecked(), New<Boolean>(baton->hasProfile));
       Set(info, New("hasAlpha").ToLocalChecked(), New<Boolean>(baton->hasAlpha));
       if (baton->orientation > 0) {
         Set(info, New("orientation").ToLocalChecked(), New<Number>(baton->orientation));
       }
       if (baton->exifLength > 0) {
-        Set(info, New("exif").ToLocalChecked(), NewBuffer(baton->exif, baton->exifLength).ToLocalChecked());
+        Set(info,
+          New("exif").ToLocalChecked(),
+          NewBuffer(baton->exif, baton->exifLength, FreeCallback, nullptr).ToLocalChecked()
+        );
       }
       if (baton->iccLength > 0) {
-        Set(info, New("icc").ToLocalChecked(), NewBuffer(baton->icc, baton->iccLength).ToLocalChecked());
+        Set(info,
+          New("icc").ToLocalChecked(),
+          NewBuffer(baton->icc, baton->iccLength, FreeCallback, nullptr).ToLocalChecked()
+        );
       }
       argv[1] = info;
     }
+
+    // Dispose of Persistent wrapper around input Buffer so it can be garbage collected
+    if (baton->bufferInLength > 0) {
+      GetFromPersistent("bufferIn");
+    }
     delete baton;
 
     // Return to JavaScript
@@ -215,17 +217,16 @@ NAN_METHOD(metadata) {
   // Input filename
   baton->fileIn = *Utf8String(Get(options, New("fileIn").ToLocalChecked()).ToLocalChecked());
   // Input Buffer object
+  Local<Object> bufferIn;
   if (node::Buffer::HasInstance(Get(options, New("bufferIn").ToLocalChecked()).ToLocalChecked())) {
-    Local<Object> buffer = Get(options, New("bufferIn").ToLocalChecked()).ToLocalChecked().As<Object>();
-    // Take a copy of the input Buffer to avoid problems with V8 heap compaction
-    baton->bufferInLength = node::Buffer::Length(buffer);
-    baton->bufferIn = new char[baton->bufferInLength];
-    memcpy(baton->bufferIn, node::Buffer::Data(buffer), baton->bufferInLength);
+    bufferIn = Get(options, New("bufferIn").ToLocalChecked()).ToLocalChecked().As<Object>();
+    baton->bufferInLength = node::Buffer::Length(bufferIn);
+    baton->bufferIn = node::Buffer::Data(bufferIn);
   }
 
   // Join queue for worker thread
   Callback *callback = new Callback(info[1].As<Function>());
-  AsyncQueueWorker(new MetadataWorker(callback, baton));
+  AsyncQueueWorker(new MetadataWorker(callback, baton, bufferIn));
 
   // Increment queued task counter
   g_atomic_int_inc(&counterQueue);

src/operations.cc

@@ -1,66 +1,88 @@
-#include <vips/vips.h>
+#include <algorithm>
+#include <tuple>
+#include <memory>
+#include <vips/vips8>
 
 #include "common.h"
 #include "operations.h"
 
+using vips::VImage;
+using vips::VError;
+
 namespace sharp {
 
   /*
-    Alpha composite src over dst
-    Assumes alpha channels are already premultiplied and will be unpremultiplied after
+    Alpha composite src over dst with given gravity.
+    Assumes alpha channels are already premultiplied and will be unpremultiplied after.
    */
-  int Composite(VipsObject *context, VipsImage *src, VipsImage *dst, VipsImage **out) {
+  VImage Composite(VImage src, VImage dst, const int gravity) {
+    if(IsInputValidForComposition(src, dst)) {
+      // Enlarge overlay src, if required
+      if (src.width() < dst.width() || src.height() < dst.height()) {
+        // Calculate the (left, top) coordinates of the output image within the input image, applying the given gravity.
+        int left;
+        int top;
+        std::tie(left, top) = CalculateCrop(dst.width(), dst.height(), src.width(), src.height(), gravity);
+        // Embed onto transparent background
+        std::vector<double> background { 0.0, 0.0, 0.0, 0.0 };
+        src = src.embed(left, top, dst.width(), dst.height(), VImage::option()
+          ->set("extend", VIPS_EXTEND_BACKGROUND)
+          ->set("background", background)
+        );
+      }
+      return CompositeImage(src, dst);
+    }
+    // If the input was not valid for composition the return the input image itself
+    return dst;
+  }
+
+
+  VImage Composite(VImage src, VImage dst, const int x, const int y) {
+    if(IsInputValidForComposition(src, dst)) {
+      // Enlarge overlay src, if required
+      if (src.width() < dst.width() || src.height() < dst.height()) {
+        // Calculate the (left, top) coordinates of the output image within the input image, applying the given gravity.
+        int left;
+        int top;
+        std::tie(left, top) = CalculateCrop(dst.width(), dst.height(), src.width(), src.height(), x, y);
+        // Embed onto transparent background
+        std::vector<double> background { 0.0, 0.0, 0.0, 0.0 };
+        src = src.embed(left, top, dst.width(), dst.height(), VImage::option()
+          ->set("extend", VIPS_EXTEND_BACKGROUND)
+          ->set("background", background)
+        );
+      }
+      return CompositeImage(src, dst);
+    }
+    // If the input was not valid for composition the return the input image itself
+    return dst;
+  }
+
+  bool IsInputValidForComposition(VImage src, VImage dst) {
+    using sharp::CalculateCrop;
     using sharp::HasAlpha;
 
-    // Split src into non-alpha and alpha
-    VipsImage *srcWithoutAlpha;
-    if (vips_extract_band(src, &srcWithoutAlpha, 0, "n", src->Bands - 1, NULL))
-      return -1;
-    vips_object_local(context, srcWithoutAlpha);
-    VipsImage *srcAlpha;
-    if (vips_extract_band(src, &srcAlpha, src->Bands - 1, "n", 1, NULL))
-      return -1;
-    vips_object_local(context, srcAlpha);
-
-    // Split dst into non-alpha and alpha channels
-    VipsImage *dstWithoutAlpha;
-    VipsImage *dstAlpha;
-    if (HasAlpha(dst)) {
-      // Non-alpha: extract all-but-last channel
-      if (vips_extract_band(dst, &dstWithoutAlpha, 0, "n", dst->Bands - 1, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, dstWithoutAlpha);
-      // Alpha: Extract last channel
-      if (vips_extract_band(dst, &dstAlpha, dst->Bands - 1, "n", 1, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, dstAlpha);
-    } else {
-      // Non-alpha: Copy reference
-      dstWithoutAlpha = dst;
-      // Alpha: Use blank, opaque (0xFF) image
-      VipsImage *black;
-      if (vips_black(&black, dst->Xsize, dst->Ysize, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, black);
-      if (vips_invert(black, &dstAlpha, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, dstAlpha);
+    if (!HasAlpha(src)) {
+      throw VError("Overlay image must have an alpha channel");
+    }
+    if (!HasAlpha(dst)) {
+      throw VError("Image to be overlaid must have an alpha channel");
+    }
+    if (src.width() > dst.width() || src.height() > dst.height()) {
+      throw VError("Overlay image must have same dimensions or smaller");
     }
 
-    // Compute normalized input alpha channels:
-    VipsImage *srcAlphaNormalized;
-    if (vips_linear1(srcAlpha, &srcAlphaNormalized, 1.0 / 255.0, 0.0, NULL))
-      return -1;
-    vips_object_local(context, srcAlphaNormalized);
+    return true;
+  }
 
-    VipsImage *dstAlphaNormalized;
-    if (vips_linear1(dstAlpha, &dstAlphaNormalized, 1.0 / 255.0, 0.0, NULL))
-      return -1;
-    vips_object_local(context, dstAlphaNormalized);
+  VImage CompositeImage(VImage src, VImage dst) {
+    // Split src into non-alpha and alpha channels
+    VImage srcWithoutAlpha = src.extract_band(0, VImage::option()->set("n", src.bands() - 1));
+    VImage srcAlpha = src[src.bands() - 1] * (1.0 / 255.0);
+
+    // Split dst into non-alpha and alpha channels
+    VImage dstWithoutAlpha = dst.extract_band(0, VImage::option()->set("n", dst.bands() - 1));
+    VImage dstAlpha = dst[dst.bands() - 1] * (1.0 / 255.0);
 
     //
     // Compute normalized output alpha channel:
@@ -72,22 +94,8 @@ namespace sharp {
     // out_a = src_a + dst_a * (1 - src_a)
     //                         ^^^^^^^^^^^
     //                            t0
-    //                 ^^^^^^^^^^^^^^^^^^^
-    //                         t1
-    VipsImage *t0;
-    if (vips_linear1(srcAlphaNormalized, &t0, -1.0, 1.0, NULL))
-      return -1;
-    vips_object_local(context, t0);
-
-    VipsImage *t1;
-    if (vips_multiply(dstAlphaNormalized, t0, &t1, NULL))
-      return -1;
-    vips_object_local(context, t1);
-
-    VipsImage *outAlphaNormalized;
-    if (vips_add(srcAlphaNormalized, t1, &outAlphaNormalized, NULL))
-      return -1;
-    vips_object_local(context, outAlphaNormalized);
+    VImage t0 = srcAlpha.linear(-1.0, 1.0);
+    VImage outAlphaNormalized = srcAlpha + dstAlpha * t0;
 
     //
     // Compute output RGB channels:
@@ -101,233 +109,353 @@ namespace sharp {
     // premultiplied RGBA image as reversal of premultiplication is handled
     // externally.
     //
-    VipsImage *t2;
-    if (vips_multiply(dstWithoutAlpha, t0, &t2, NULL))
-      return -1;
-    vips_object_local(context, t2);
-
-    VipsImage *outRGBPremultiplied;
-    if (vips_add(srcWithoutAlpha, t2, &outRGBPremultiplied, NULL))
-      return -1;
-    vips_object_local(context, outRGBPremultiplied);
-
-    // Denormalize output alpha channel:
-    VipsImage *outAlpha;
-    if (vips_linear1(outAlphaNormalized, &outAlpha, 255.0, 0.0, NULL))
-      return -1;
-    vips_object_local(context, outAlpha);
+    VImage outRGBPremultiplied = srcWithoutAlpha + dstWithoutAlpha * t0;
 
     // Combine RGB and alpha channel into output image:
-    return vips_bandjoin2(outRGBPremultiplied, outAlpha, out, NULL);
+    return outRGBPremultiplied.bandjoin(outAlphaNormalized * 255.0);
   }
 
   /*
-   * Premultiply alpha channel of `image`.
+    Cutout src over dst with given gravity.
    */
-  int Premultiply(VipsObject *context, VipsImage *image, VipsImage **out) {
-#if (VIPS_MAJOR_VERSION >= 9 || (VIPS_MAJOR_VERSION >= 8 && VIPS_MINOR_VERSION >= 1))
-    return vips_premultiply(image, out, NULL);
-#else
-    VipsImage *imageRGB;
-    if (vips_extract_band(image, &imageRGB, 0, "n", image->Bands - 1, NULL))
-      return -1;
-    vips_object_local(context, imageRGB);
+  VImage Cutout(VImage mask, VImage dst, const int gravity) {
+    using sharp::CalculateCrop;
+    using sharp::HasAlpha;
+    using sharp::MaximumImageAlpha;
 
-    VipsImage *imageAlpha;
-    if (vips_extract_band(image, &imageAlpha, image->Bands - 1, "n", 1, NULL))
-      return -1;
-    vips_object_local(context, imageAlpha);
+    bool maskHasAlpha = HasAlpha(mask);
 
-    VipsImage *imageAlphaNormalized;
-    if (vips_linear1(imageAlpha, &imageAlphaNormalized, 1.0 / 255.0, 0.0, NULL))
-      return -1;
-    vips_object_local(context, imageAlphaNormalized);
+    if (!maskHasAlpha && mask.bands() > 1) {
+      throw VError("Overlay image must have an alpha channel or one band");
+    }
+    if (!HasAlpha(dst)) {
+      throw VError("Image to be overlaid must have an alpha channel");
+    }
+    if (mask.width() > dst.width() || mask.height() > dst.height()) {
+      throw VError("Overlay image must have same dimensions or smaller");
+    }
 
-    VipsImage *imageRGBPremultiplied;
-    if (vips_multiply(imageRGB, imageAlphaNormalized, &imageRGBPremultiplied, NULL))
-      return -1;
-    vips_object_local(context, imageRGBPremultiplied);
+    // Enlarge overlay mask, if required
+    if (mask.width() < dst.width() || mask.height() < dst.height()) {
+      // Calculate the (left, top) coordinates of the output image within the input image, applying the given gravity.
+      int left;
+      int top;
+      std::tie(left, top) = CalculateCrop(dst.width(), dst.height(), mask.width(), mask.height(), gravity);
+      // Embed onto transparent background
+      std::vector<double> background { 0.0, 0.0, 0.0, 0.0 };
+      mask = mask.embed(left, top, dst.width(), dst.height(), VImage::option()
+              ->set("extend", VIPS_EXTEND_BACKGROUND)
+              ->set("background", background)
+      );
+    }
 
-    return vips_bandjoin2(imageRGBPremultiplied, imageAlpha, out, NULL);
-#endif
-  }
+    // we use the mask alpha if it has alpha
+    if(maskHasAlpha) {
+      mask = mask.extract_band(mask.bands() - 1, VImage::option()->set("n", 1));;
+    }
 
-  /*
-   * Unpremultiply alpha channel of `image`.
-   */
-  int Unpremultiply(VipsObject *context, VipsImage *image, VipsImage **out) {
-#if (VIPS_MAJOR_VERSION >= 9 || (VIPS_MAJOR_VERSION >= 8 && VIPS_MINOR_VERSION >= 1))
-    return vips_unpremultiply(image, out, NULL);
-#else
-    VipsImage *imageRGBPremultipliedTransformed;
-    if (vips_extract_band(image, &imageRGBPremultipliedTransformed, 0, "n", image->Bands - 1, NULL))
-      return -1;
-    vips_object_local(context, imageRGBPremultipliedTransformed);
+    // Split dst into an optional alpha
+    VImage dstAlpha = dst.extract_band(dst.bands() - 1, VImage::option()->set("n", 1));
 
-    VipsImage *imageAlphaTransformed;
-    if (vips_extract_band(image, &imageAlphaTransformed, image->Bands - 1, "n", 1, NULL))
-      return -1;
-    vips_object_local(context, imageAlphaTransformed);
+    // we use the dst non-alpha
+    dst = dst.extract_band(0, VImage::option()->set("n", dst.bands() - 1));
 
-    VipsImage *imageAlphaNormalizedTransformed;
-    if (vips_linear1(imageAlphaTransformed, &imageAlphaNormalizedTransformed, 1.0 / 255.0, 0.0, NULL))
-      return -1;
-    vips_object_local(context, imageAlphaNormalizedTransformed);
+    // the range of the mask and the image need to match .. one could be
+    // 16-bit, one 8-bit
+    double const dstMax = MaximumImageAlpha(dst.interpretation());
+    double const maskMax = MaximumImageAlpha(mask.interpretation());
 
-    VipsImage *imageRGBUnpremultipliedTransformed;
-    if (vips_divide(imageRGBPremultipliedTransformed, imageAlphaNormalizedTransformed, &imageRGBUnpremultipliedTransformed, NULL))
-      return -1;
-    vips_object_local(context, imageRGBUnpremultipliedTransformed);
+    // combine the new mask and the existing alpha ... there are
+    // many ways of doing this, mult is the simplest
+    mask = dstMax * ((mask / maskMax) * (dstAlpha / dstMax));
 
-    return vips_bandjoin2(imageRGBUnpremultipliedTransformed, imageAlphaTransformed, out, NULL);
-#endif
+    // append the mask to the image data ... the mask might be float now,
+    // we must cast the format down to match the image data
+    return dst.bandjoin(mask.cast(dst.format()));
   }
 
   /*
    * Stretch luminance to cover full dynamic range.
    */
-  int Normalize(VipsObject *context, VipsImage *image, VipsImage **out) {
-#ifndef _WIN32
+  VImage Normalize(VImage image) {
     // Get original colourspace
-    VipsInterpretation typeBeforeNormalize = image->Type;
+    VipsInterpretation typeBeforeNormalize = image.interpretation();
     if (typeBeforeNormalize == VIPS_INTERPRETATION_RGB) {
       typeBeforeNormalize = VIPS_INTERPRETATION_sRGB;
     }
     // Convert to LAB colourspace
-    VipsImage *lab;
-    if (vips_colourspace(image, &lab, VIPS_INTERPRETATION_LAB, NULL)) {
-      return -1;
-    }
-    vips_object_local(context, lab);
+    VImage lab = image.colourspace(VIPS_INTERPRETATION_LAB);
     // Extract luminance
-    VipsImage *luminance;
-    if (vips_extract_band(lab, &luminance, 0, "n", 1, NULL)) {
-      return -1;
-    }
-    vips_object_local(context, luminance);
-    // Extract chroma
-    VipsImage *chroma;
-    if (vips_extract_band(lab, &chroma, 1, "n", 2, NULL)) {
-      return -1;
-    }
-    vips_object_local(context, chroma);
+    VImage luminance = lab[0];
     // Find luminance range
-    VipsImage *stats;
-    if (vips_stats(luminance, &stats, NULL)) {
-      return -1;
-    }
-    vips_object_local(context, stats);
-    double min = *VIPS_MATRIX(stats, 0, 0);
-    double max = *VIPS_MATRIX(stats, 1, 0);
+    VImage stats = luminance.stats();
+    double min = stats(0, 0)[0];
+    double max = stats(1, 0)[0];
     if (min != max) {
+      // Extract chroma
+      VImage chroma = lab.extract_band(1, VImage::option()->set("n", 2));
+      // Calculate multiplication factor and addition
       double f = 100.0 / (max - min);
       double a = -(min * f);
-      // Scale luminance
-      VipsImage *luminance100;
-      if (vips_linear1(luminance, &luminance100, f, a, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, luminance100);
-      // Join scaled luminance to chroma
-      VipsImage *normalizedLab;
-      if (vips_bandjoin2(luminance100, chroma, &normalizedLab, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, normalizedLab);
-      // Convert to original colourspace
-      VipsImage *normalized;
-      if (vips_colourspace(normalizedLab, &normalized, typeBeforeNormalize, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, normalized);
+      // Scale luminance, join to chroma, convert back to original colourspace
+      VImage normalized = luminance.linear(f, a).bandjoin(chroma).colourspace(typeBeforeNormalize);
       // Attach original alpha channel, if any
       if (HasAlpha(image)) {
         // Extract original alpha channel
-        VipsImage *alpha;
-        if (vips_extract_band(image, &alpha, image->Bands - 1, "n", 1, NULL)) {
-          return -1;
-        }
-        vips_object_local(context, alpha);
+        VImage alpha = image[image.bands() - 1];
         // Join alpha channel to normalised image
-        VipsImage *normalizedAlpha;
-        if (vips_bandjoin2(normalized, alpha, &normalizedAlpha, NULL)) {
-          return -1;
-        }
-        vips_object_local(context, normalizedAlpha);
-        *out = normalizedAlpha;
+        return normalized.bandjoin(alpha);
       } else {
-        *out = normalized;
+        return normalized;
       }
-    } else {
-      // Cannot normalise zero-range image
-      *out = image;
     }
-#else
-    // The normalize operation is currently unsupported on Windows
-    // See https://github.com/lovell/sharp/issues/152
-    *out = image;
-#endif
-    return 0;
+    return image;
   }
 
   /*
-   * Gaussian blur (use sigma <0 for fast blur)
+   * Gamma encoding/decoding
    */
-  int Blur(VipsObject *context, VipsImage *image, VipsImage **out, double sigma) {
-    VipsImage *blurred;
-    if (sigma < 0.0) {
+  VImage Gamma(VImage image, double const exponent) {
+    if (HasAlpha(image)) {
+      // Separate alpha channel
+      VImage imageWithoutAlpha = image.extract_band(0,
+        VImage::option()->set("n", image.bands() - 1));
+      VImage alpha = image[image.bands() - 1];
+      return imageWithoutAlpha.gamma(VImage::option()->set("exponent", exponent)).bandjoin(alpha);
+    } else {
+      return image.gamma(VImage::option()->set("exponent", exponent));
+    }
+  }
+
+  /*
+   * Gaussian blur. Use sigma of -1.0 for fast blur.
+   */
+  VImage Blur(VImage image, double const sigma) {
+    if (sigma == -1.0) {
       // Fast, mild blur - averages neighbouring pixels
-      VipsImage *blur = vips_image_new_matrixv(3, 3,
+      VImage blur = VImage::new_matrixv(3, 3,
         1.0, 1.0, 1.0,
         1.0, 1.0, 1.0,
         1.0, 1.0, 1.0);
-      vips_image_set_double(blur, "scale", 9);
-      vips_object_local(context, blur);
-      if (vips_conv(image, &blurred, blur, NULL)) {
-        return -1;
-      }
+      blur.set("scale", 9.0);
+      return image.conv(blur);
     } else {
       // Slower, accurate Gaussian blur
-      // Create Gaussian function for standard deviation
-      VipsImage *gaussian;
-      if (vips_gaussmat(&gaussian, sigma, 0.2, "separable", TRUE, "integer", TRUE, NULL)) {
-        return -1;
-      }
-      vips_object_local(context, gaussian);
-      // Apply Gaussian function
-      if (vips_convsep(image, &blurred, gaussian, "precision", VIPS_PRECISION_INTEGER, NULL)) {
-        return -1;
-      }
+      return image.gaussblur(sigma);
     }
-    vips_object_local(context, blurred);
-    *out = blurred;
-    return 0;
   }
 
   /*
-   * Sharpen flat and jagged areas. Use radius of -1 for fast sharpen.
+   * Convolution with a kernel.
    */
-  int Sharpen(VipsObject *context, VipsImage *image, VipsImage **out, int radius, double flat, double jagged) {
-    VipsImage *sharpened;
-    if (radius == -1) {
+  VImage Convolve(VImage image, int const width, int const height,
+    double const scale, double const offset,
+    std::unique_ptr<double[]> const &kernel_v
+  ) {
+    VImage kernel = VImage::new_from_memory(
+      kernel_v.get(),
+      width * height * sizeof(double),
+      width,
+      height,
+      1,
+      VIPS_FORMAT_DOUBLE);
+    kernel.set("scale", scale);
+    kernel.set("offset", offset);
+
+    return image.conv(kernel);
+  }
+
+  /*
+   * Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
+   */
+  VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged) {
+    if (sigma == -1.0) {
       // Fast, mild sharpen
-      VipsImage *sharpen = vips_image_new_matrixv(3, 3,
+      VImage sharpen = VImage::new_matrixv(3, 3,
         -1.0, -1.0, -1.0,
         -1.0, 32.0, -1.0,
         -1.0, -1.0, -1.0);
-      vips_image_set_double(sharpen, "scale", 24);
-      vips_object_local(context, sharpen);
-      if (vips_conv(image, &sharpened, sharpen, NULL)) {
-        return -1;
-      }
+      sharpen.set("scale", 24.0);
+      return image.conv(sharpen);
     } else {
       // Slow, accurate sharpen in LAB colour space, with control over flat vs jagged areas
-      if (vips_sharpen(image, &sharpened, "radius", radius, "m1", flat, "m2", jagged, NULL)) {
-        return -1;
+      VipsInterpretation colourspaceBeforeSharpen = image.interpretation();
+      if (colourspaceBeforeSharpen == VIPS_INTERPRETATION_RGB) {
+        colourspaceBeforeSharpen = VIPS_INTERPRETATION_sRGB;
+      }
+      return image.sharpen(
+        VImage::option()->set("sigma", sigma)->set("m1", flat)->set("m2", jagged)
+      ).colourspace(colourspaceBeforeSharpen);
+    }
+  }
+
+  /*
+    Calculate crop area based on image entropy
+  */
+  std::tuple<int, int> EntropyCrop(VImage image, int const outWidth, int const outHeight) {
+    int left = 0;
+    int top = 0;
+    int const inWidth = image.width();
+    int const inHeight = image.height();
+    if (inWidth > outWidth) {
+      // Reduce width by repeated removing slices from edge with lowest entropy
+      int width = inWidth;
+      double leftEntropy = 0.0;
+      double rightEntropy = 0.0;
+      // Max width of each slice
+      int const maxSliceWidth = static_cast<int>(ceil((inWidth - outWidth) / 8.0));
+      while (width > outWidth) {
+        // Width of current slice
+        int const slice = std::min(width - outWidth, maxSliceWidth);
+        if (leftEntropy == 0.0) {
+          // Update entropy of left slice
+          leftEntropy = Entropy(image.extract_area(left, 0, slice, inHeight));
+        }
+        if (rightEntropy == 0.0) {
+          // Update entropy of right slice
+          rightEntropy = Entropy(image.extract_area(width - slice - 1, 0, slice, inHeight));
+        }
+        // Keep slice with highest entropy
+        if (leftEntropy >= rightEntropy) {
+          // Discard right slice
+          rightEntropy = 0.0;
+        } else {
+          // Discard left slice
+          leftEntropy = 0.0;
+          left = left + slice;
+        }
+        width = width - slice;
       }
     }
-    vips_object_local(context, sharpened);
-    *out = sharpened;
-    return 0;
+    if (inHeight > outHeight) {
+      // Reduce height by repeated removing slices from edge with lowest entropy
+      int height = inHeight;
+      double topEntropy = 0.0;
+      double bottomEntropy = 0.0;
+      // Max height of each slice
+      int const maxSliceHeight = static_cast<int>(ceil((inHeight - outHeight) / 8.0));
+      while (height > outHeight) {
+        // Height of current slice
+        int const slice = std::min(height - outHeight, maxSliceHeight);
+        if (topEntropy == 0.0) {
+          // Update entropy of top slice
+          topEntropy = Entropy(image.extract_area(0, top, inWidth, slice));
+        }
+        if (bottomEntropy == 0.0) {
+          // Update entropy of bottom slice
+          bottomEntropy = Entropy(image.extract_area(0, height - slice - 1, inWidth, slice));
+        }
+        // Keep slice with highest entropy
+        if (topEntropy >= bottomEntropy) {
+          // Discard bottom slice
+          bottomEntropy = 0.0;
+        } else {
+          // Discard top slice
+          topEntropy = 0.0;
+          top = top + slice;
+        }
+        height = height - slice;
+      }
+    }
+    return std::make_tuple(left, top);
   }
+
+  /*
+    Calculate the Shannon entropy for an image
+  */
+  double Entropy(VImage image) {
+    return image.hist_find().hist_entropy();
+  }
+
+  /*
+    Insert a tile cache to prevent over-computation of any previous operations in the pipeline
+  */
+  VImage TileCache(VImage image, double const factor) {
+    int tile_width;
+    int tile_height;
+    int scanline_count;
+    vips_get_tile_size(image.get_image(), &tile_width, &tile_height, &scanline_count);
+    double const need_lines = 1.2 * scanline_count / factor;
+    return image.tilecache(VImage::option()
+      ->set("tile_width", image.width())
+      ->set("tile_height", 10)
+      ->set("max_tiles", static_cast<int>(round(1.0 + need_lines / 10.0)))
+      ->set("access", VIPS_ACCESS_SEQUENTIAL)
+      ->set("threaded", TRUE)
+    );
+  }
+
+  VImage Threshold(VImage image, double const threshold, bool const thresholdGrayscale) {
+    if(!thresholdGrayscale) {
+      return image >= threshold;
+    }
+    return image.colourspace(VIPS_INTERPRETATION_B_W) >= threshold;
+  }
+
+  /*
+    Perform boolean/bitwise operation on image color channels - results in one channel image
+  */
+  VImage Bandbool(VImage image, VipsOperationBoolean const boolean) {
+    return image.bandbool(boolean);
+  }
+
+  /*
+    Perform bitwise boolean operation between images
+  */
+  VImage Boolean(VImage image, VImage imageR, VipsOperationBoolean const boolean) {
+    return image.boolean(imageR, boolean);
+  }
+
+  VImage Trim(VImage image, int const tolerance) {
+    using sharp::MaximumImageAlpha;
+    // An equivalent of ImageMagick's -trim in C++ ... automatically remove
+    // "boring" image edges.
+
+    // We use .project to sum the rows and columns of a 0/255 mask image, the first
+    // non-zero row or column is the object edge. We make the mask image with an
+    // amount-different-from-background image plus a threshold.
+
+    // find the value of the pixel at (0, 0) ... we will search for all pixels
+    // significantly different from this
+    std::vector<double> background = image(0, 0);
+
+    double const max = MaximumImageAlpha(image.interpretation());
+
+    // we need to smooth the image, subtract the background from every pixel, take
+    // the absolute value of the difference, then threshold
+    VImage mask = (image.median(3) - background).abs() > (max * tolerance / 100);
+
+    // sum mask rows and columns, then search for the first non-zero sum in each
+    // direction
+    VImage rows;
+    VImage columns = mask.project(&rows);
+
+    VImage profileLeftV;
+    VImage profileLeftH = columns.profile(&profileLeftV);
+
+    VImage profileRightV;
+    VImage profileRightH = columns.fliphor().profile(&profileRightV);
+
+    VImage profileTopV;
+    VImage profileTopH = rows.profile(&profileTopV);
+
+    VImage profileBottomV;
+    VImage profileBottomH = rows.flipver().profile(&profileBottomV);
+
+    int left = static_cast<int>(floor(profileLeftV.min()));
+    int right = columns.width() - static_cast<int>(floor(profileRightV.min()));
+    int top = static_cast<int>(floor(profileTopH.min()));
+    int bottom = rows.height() - static_cast<int>(floor(profileBottomH.min()));
+
+    int width = right - left;
+    int height = bottom - top;
+
+    if(width <= 0 || height <= 0) {
+      throw VError("Unexpected error while trimming. Try to lower the tolerance");
+    }
+
+    // and now crop the original image
+    return image.extract_area(left, top, width, height);
+  }
+
 }  // namespace sharp

src/operations.h

@@ -1,38 +1,101 @@
 #ifndef SRC_OPERATIONS_H_
 #define SRC_OPERATIONS_H_
 
+#include <tuple>
+#include <memory>
+#include <vips/vips8>
+
+using vips::VImage;
+
 namespace sharp {
 
   /*
-    Composite images `src` and `dst` with premultiplied alpha channel and output
-    image with premultiplied alpha.
+    Alpha composite src over dst with given gravity.
+    Assumes alpha channels are already premultiplied and will be unpremultiplied after.
    */
-  int Composite(VipsObject *context, VipsImage *src, VipsImage *dst, VipsImage **out);
+  VImage Composite(VImage src, VImage dst, const int gravity);
 
   /*
-   * Premultiply alpha channel of `image`.
+    Alpha composite src over dst with given x and y offsets.
+    Assumes alpha channels are already premultiplied and will be unpremultiplied after.
    */
-  int Premultiply(VipsObject *context, VipsImage *image, VipsImage **out);
+  VImage Composite(VImage src, VImage dst, const int x, const int y);
 
   /*
-   * Unpremultiply alpha channel of `image`.
-   */
-  int Unpremultiply(VipsObject *context, VipsImage *image, VipsImage **out);
+    Check if the src and dst Images for composition operation are valid
+  */
+  bool IsInputValidForComposition(VImage src, VImage dst);
+
+  /*
+    Given a valid src and dst, returns the composite of the two images
+  */
+  VImage CompositeImage(VImage src, VImage dst);
+
+  /*
+    Cutout src over dst with given gravity.
+  */
+  VImage Cutout(VImage src, VImage dst, const int gravity);
 
   /*
    * Stretch luminance to cover full dynamic range.
    */
-  int Normalize(VipsObject *context, VipsImage *image, VipsImage **out);
+  VImage Normalize(VImage image);
 
   /*
-   * Gaussian blur. Use sigma of -1 for fast blur.
+   * Gamma encoding/decoding
    */
-  int Blur(VipsObject *context, VipsImage *image, VipsImage **out, double sigma);
+  VImage Gamma(VImage image, double const exponent);
 
   /*
-   * Sharpen flat and jagged areas. Use radius of -1 for fast sharpen.
+   * Gaussian blur. Use sigma of -1.0 for fast blur.
    */
-  int Sharpen(VipsObject *context, VipsImage *image, VipsImage **out, int radius, double flat, double jagged);
+  VImage Blur(VImage image, double const sigma);
+
+  /*
+   * Convolution with a kernel.
+   */
+  VImage Convolve(VImage image, int const width, int const height,
+    double const scale, double const offset, std::unique_ptr<double[]> const &kernel_v);
+
+  /*
+   * Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
+   */
+  VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged);
+
+  /*
+    Calculate crop area based on image entropy
+  */
+  std::tuple<int, int> EntropyCrop(VImage image, int const outWidth, int const outHeight);
+
+  /*
+    Calculate the Shannon entropy for an image
+  */
+  double Entropy(VImage image);
+
+  /*
+    Insert a tile cache to prevent over-computation of any previous operations in the pipeline
+  */
+  VImage TileCache(VImage image, double const factor);
+
+  /*
+    Threshold an image
+  */
+  VImage Threshold(VImage image, double const threshold, bool const thresholdColor);
+
+  /*
+    Perform boolean/bitwise operation on image color channels - results in one channel image
+  */
+  VImage Bandbool(VImage image, VipsOperationBoolean const boolean);
+
+  /*
+    Perform bitwise boolean operation between images
+  */
+  VImage Boolean(VImage image, VImage imageR, VipsOperationBoolean const boolean);
+
+  /*
+    Trim an image
+  */
+  VImage Trim(VImage image, int const tolerance);
 
 }  // namespace sharp
 

src/pipeline.h

@@ -1,8 +1,177 @@
 #ifndef SRC_PIPELINE_H_
 #define SRC_PIPELINE_H_
 
+#include <memory>
+
+#include <vips/vips8>
+
 #include "nan.h"
 
 NAN_METHOD(pipeline);
 
+enum class Canvas {
+  CROP,
+  EMBED,
+  MAX,
+  MIN,
+  IGNORE_ASPECT
+};
+
+struct PipelineBaton {
+  std::string fileIn;
+  char *bufferIn;
+  size_t bufferInLength;
+  std::string iccProfilePath;
+  int limitInputPixels;
+  int density;
+  int rawWidth;
+  int rawHeight;
+  int rawChannels;
+  std::string formatOut;
+  std::string fileOut;
+  void *bufferOut;
+  size_t bufferOutLength;
+  std::string overlayFileIn;
+  char *overlayBufferIn;
+  size_t overlayBufferInLength;
+  int overlayGravity;
+  int overlayXOffset;
+  int overlayYOffset;
+  bool overlayTile;
+  bool overlayCutout;
+  std::string booleanFileIn;
+  char *booleanBufferIn;
+  size_t booleanBufferInLength;
+  int topOffsetPre;
+  int leftOffsetPre;
+  int widthPre;
+  int heightPre;
+  int topOffsetPost;
+  int leftOffsetPost;
+  int widthPost;
+  int heightPost;
+  int width;
+  int height;
+  int channels;
+  Canvas canvas;
+  int crop;
+  std::string kernel;
+  std::string interpolator;
+  double background[4];
+  bool flatten;
+  bool negate;
+  double blurSigma;
+  double sharpenSigma;
+  double sharpenFlat;
+  double sharpenJagged;
+  int threshold;
+  bool thresholdGrayscale;
+  int trimTolerance;
+  double gamma;
+  bool greyscale;
+  bool normalize;
+  int angle;
+  bool rotateBeforePreExtract;
+  bool flip;
+  bool flop;
+  int extendTop;
+  int extendBottom;
+  int extendLeft;
+  int extendRight;
+  bool progressive;
+  bool withoutEnlargement;
+  VipsAccess accessMethod;
+  int quality;
+  int compressionLevel;
+  bool withoutAdaptiveFiltering;
+  bool withoutChromaSubsampling;
+  bool trellisQuantisation;
+  bool overshootDeringing;
+  bool optimiseScans;
+  std::string err;
+  bool withMetadata;
+  int withMetadataOrientation;
+  std::unique_ptr<double[]> convKernel;
+  int convKernelWidth;
+  int convKernelHeight;
+  double convKernelScale;
+  double convKernelOffset;
+  VipsOperationBoolean bandBoolOp;
+  VipsOperationBoolean booleanOp;
+  int extractChannel;
+  int tileSize;
+  int tileOverlap;
+  VipsForeignDzContainer tileContainer;
+  VipsForeignDzLayout tileLayout;
+
+  PipelineBaton():
+    bufferInLength(0),
+    limitInputPixels(0),
+    density(72),
+    rawWidth(0),
+    rawHeight(0),
+    rawChannels(0),
+    formatOut(""),
+    fileOut(""),
+    bufferOutLength(0),
+    overlayBufferInLength(0),
+    overlayGravity(0),
+    overlayXOffset(-1),
+    overlayYOffset(-1),
+    overlayTile(false),
+    overlayCutout(false),
+    booleanBufferInLength(0),
+    topOffsetPre(-1),
+    topOffsetPost(-1),
+    channels(0),
+    canvas(Canvas::CROP),
+    crop(0),
+    flatten(false),
+    negate(false),
+    blurSigma(0.0),
+    sharpenSigma(0.0),
+    sharpenFlat(1.0),
+    sharpenJagged(2.0),
+    threshold(0),
+    thresholdGrayscale(true),
+    trimTolerance(0),
+    gamma(0.0),
+    greyscale(false),
+    normalize(false),
+    angle(0),
+    flip(false),
+    flop(false),
+    extendTop(0),
+    extendBottom(0),
+    extendLeft(0),
+    extendRight(0),
+    progressive(false),
+    withoutEnlargement(false),
+    quality(80),
+    compressionLevel(6),
+    withoutAdaptiveFiltering(false),
+    withoutChromaSubsampling(false),
+    trellisQuantisation(false),
+    overshootDeringing(false),
+    optimiseScans(false),
+    withMetadata(false),
+    withMetadataOrientation(-1),
+    convKernelWidth(0),
+    convKernelHeight(0),
+    convKernelScale(0.0),
+    convKernelOffset(0.0),
+    bandBoolOp(VIPS_OPERATION_BOOLEAN_LAST),
+    booleanOp(VIPS_OPERATION_BOOLEAN_LAST),
+    extractChannel(-1),
+    tileSize(256),
+    tileOverlap(0),
+    tileContainer(VIPS_FOREIGN_DZ_CONTAINER_FS),
+    tileLayout(VIPS_FOREIGN_DZ_LAYOUT_DZ) {
+      background[0] = 0.0;
+      background[1] = 0.0;
+      background[2] = 0.0;
+      background[3] = 255.0;
+    }
+};
+
 #endif  // SRC_PIPELINE_H_

src/sharp.cc

@@ -1,5 +1,5 @@
 #include <node.h>
-#include <vips/vips.h>
+#include <vips/vips8>
 
 #include "nan.h"
 
@@ -11,10 +11,6 @@
 NAN_MODULE_INIT(init) {
   vips_init("sharp");
 
-  // Set libvips operation cache limits
-  vips_cache_set_max_mem(100 * 1024 * 1024); // 100 MB
-  vips_cache_set_max(500); // 500 operations
-
   // Methods available to JavaScript
   Nan::Set(target, Nan::New("metadata").ToLocalChecked(),
     Nan::GetFunction(Nan::New<v8::FunctionTemplate>(metadata)).ToLocalChecked());
@@ -26,6 +22,8 @@ NAN_MODULE_INIT(init) {
     Nan::GetFunction(Nan::New<v8::FunctionTemplate>(concurrency)).ToLocalChecked());
   Nan::Set(target, Nan::New("counters").ToLocalChecked(),
     Nan::GetFunction(Nan::New<v8::FunctionTemplate>(counters)).ToLocalChecked());
+  Nan::Set(target, Nan::New("simd").ToLocalChecked(),
+    Nan::GetFunction(Nan::New<v8::FunctionTemplate>(simd)).ToLocalChecked());
   Nan::Set(target, Nan::New("libvipsVersion").ToLocalChecked(),
     Nan::GetFunction(Nan::New<v8::FunctionTemplate>(libvipsVersion)).ToLocalChecked());
   Nan::Set(target, Nan::New("format").ToLocalChecked(),

src/utilities.cc

@@ -1,5 +1,7 @@
+#include <cmath>
 #include <node.h>
-#include <vips/vips.h>
+#include <vips/vips8>
+#include <vips/vector.h>
 
 #include "nan.h"
 
@@ -7,11 +9,12 @@
 #include "operations.h"
 #include "utilities.h"
 
-using v8::Local;
-using v8::Object;
-using v8::Number;
-using v8::String;
 using v8::Boolean;
+using v8::Integer;
+using v8::Local;
+using v8::Number;
+using v8::Object;
+using v8::String;
 
 using Nan::HandleScope;
 using Nan::New;
@@ -21,27 +24,49 @@ using Nan::To;
 using Nan::Utf8String;
 
 /*
-  Get and set cache memory and item limits
+  Get and set cache limits
 */
 NAN_METHOD(cache) {
   HandleScope();
 
-  // Set cache memory limit
+  // Set memory limit
   if (info[0]->IsInt32()) {
     vips_cache_set_max_mem(To<int32_t>(info[0]).FromJust() * 1048576);
   }
-
-  // Set cache items limit
+  // Set file limit
   if (info[1]->IsInt32()) {
-    vips_cache_set_max(To<int32_t>(info[1]).FromJust());
+    vips_cache_set_max_files(To<int32_t>(info[1]).FromJust());
+  }
+  // Set items limit
+  if (info[2]->IsInt32()) {
+    vips_cache_set_max(To<int32_t>(info[2]).FromJust());
   }
 
-  // Get cache statistics
+  // Get memory stats
+  Local<Object> memory = New<Object>();
+  Set(memory, New("current").ToLocalChecked(),
+    New<Integer>(static_cast<int>(round(vips_tracked_get_mem() / 1048576)))
+  );
+  Set(memory, New("high").ToLocalChecked(),
+    New<Integer>(static_cast<int>(round(vips_tracked_get_mem_highwater() / 1048576)))
+  );
+  Set(memory, New("max").ToLocalChecked(),
+    New<Integer>(static_cast<int>(round(vips_cache_get_max_mem() / 1048576)))
+  );
+  // Get file stats
+  Local<Object> files = New<Object>();
+  Set(files, New("current").ToLocalChecked(), New<Integer>(vips_tracked_get_files()));
+  Set(files, New("max").ToLocalChecked(), New<Integer>(vips_cache_get_max_files()));
+
+  // Get item stats
+  Local<Object> items = New<Object>();
+  Set(items, New("current").ToLocalChecked(), New<Integer>(vips_cache_get_size()));
+  Set(items, New("max").ToLocalChecked(), New<Integer>(vips_cache_get_max()));
+
   Local<Object> cache = New<Object>();
-  Set(cache, New("current").ToLocalChecked(), New<Number>(vips_tracked_get_mem() / 1048576));
-  Set(cache, New("high").ToLocalChecked(), New<Number>(vips_tracked_get_mem_highwater() / 1048576));
-  Set(cache, New("memory").ToLocalChecked(), New<Number>(vips_cache_get_max_mem() / 1048576));
-  Set(cache, New("items").ToLocalChecked(), New<Number>(vips_cache_get_max()));
+  Set(cache, New("memory").ToLocalChecked(), memory);
+  Set(cache, New("files").ToLocalChecked(), files);
+  Set(cache, New("items").ToLocalChecked(), items);
   info.GetReturnValue().Set(cache);
 }
 
@@ -56,7 +81,7 @@ NAN_METHOD(concurrency) {
     vips_concurrency_set(To<int32_t>(info[0]).FromJust());
   }
   // Get concurrency
-  info.GetReturnValue().Set(New<Number>(vips_concurrency_get()));
+  info.GetReturnValue().Set(New<Integer>(vips_concurrency_get()));
 }
 
 /*
@@ -68,11 +93,25 @@ NAN_METHOD(counters) {
 
   HandleScope();
   Local<Object> counters = New<Object>();
-  Set(counters, New("queue").ToLocalChecked(), New<Number>(counterQueue));
-  Set(counters, New("process").ToLocalChecked(), New<Number>(counterProcess));
+  Set(counters, New("queue").ToLocalChecked(), New<Integer>(counterQueue));
+  Set(counters, New("process").ToLocalChecked(), New<Integer>(counterProcess));
   info.GetReturnValue().Set(counters);
 }
 
+/*
+  Get and set use of SIMD vector unit instructions
+*/
+NAN_METHOD(simd) {
+  HandleScope();
+
+  // Set state
+  if (info[0]->IsBoolean()) {
+    vips_vector_set_enabled(To<bool>(info[0]).FromJust());
+  }
+  // Get state
+  info.GetReturnValue().Set(New<Boolean>(vips_vector_isenabled()));
+}
+
 /*
   Get libvips version
 */
@@ -99,7 +138,9 @@ NAN_METHOD(format) {
 
   // Which load/save operations are available for each compressed format?
   Local<Object> format = New<Object>();
-  for (std::string f : {"jpeg", "png", "webp", "tiff", "magick", "openslide", "dz"}) {
+  for (std::string f : {
+    "jpeg", "png", "webp", "tiff", "magick", "openslide", "dz", "ppm", "fits", "gif", "svg", "pdf", "v"
+  }) {
     // Input
     Local<Boolean> hasInputFile =
       New<Boolean>(vips_type_find("VipsOperation", (f + "load").c_str()));
@@ -133,19 +174,17 @@ NAN_METHOD(format) {
   Local<String> rawId = New("raw").ToLocalChecked();
   Set(raw, attrId, rawId);
   Set(format, rawId, raw);
-  // No support for raw input yet, so always false
+  Local<Boolean> supported = New<Boolean>(true);
   Local<Boolean> unsupported = New<Boolean>(false);
   Local<Object> rawInput = New<Object>();
   Set(rawInput, attrFile, unsupported);
-  Set(rawInput, attrBuffer, unsupported);
-  Set(rawInput, attrStream, unsupported);
+  Set(rawInput, attrBuffer, supported);
+  Set(rawInput, attrStream, supported);
   Set(raw, attrInput, rawInput);
-  // Raw output via Buffer/Stream is available in libvips >= 7.42.0
-  Local<Boolean> hasOutputBufferRaw = New<Boolean>(vips_version(0) >= 8 || (vips_version(0) == 7 && vips_version(1) >= 42));
   Local<Object> rawOutput = New<Object>();
   Set(rawOutput, attrFile, unsupported);
-  Set(rawOutput, attrBuffer, hasOutputBufferRaw);
-  Set(rawOutput, attrStream, hasOutputBufferRaw);
+  Set(rawOutput, attrBuffer, supported);
+  Set(rawOutput, attrStream, supported);
   Set(raw, attrOutput, rawOutput);
 
   info.GetReturnValue().Set(format);
@@ -157,102 +196,64 @@ NAN_METHOD(format) {
   between two images of the same dimensions and number of channels.
 */
 NAN_METHOD(_maxColourDistance) {
-  using sharp::Premultiply;
+  using vips::VImage;
+  using vips::VError;
   using sharp::DetermineImageType;
   using sharp::ImageType;
-  using sharp::InitImage;
   using sharp::HasAlpha;
 
   HandleScope();
 
-  // Create "hook" VipsObject to hang image references from
-  VipsObject *hook = reinterpret_cast<VipsObject*>(vips_image_new());
-
   // Open input files
-  VipsImage *image1 = NULL;
+  VImage image1;
   ImageType imageType1 = DetermineImageType(*Utf8String(info[0]));
   if (imageType1 != ImageType::UNKNOWN) {
-    image1 = InitImage(*Utf8String(info[0]), VIPS_ACCESS_SEQUENTIAL);
-    if (image1 == NULL) {
-      g_object_unref(hook);
+    try {
+      image1 = VImage::new_from_file(*Utf8String(info[0]));
+    } catch (...) {
       return ThrowError("Input file 1 has corrupt header");
-    } else {
-      vips_object_local(hook, image1);
     }
   } else {
-    g_object_unref(hook);
     return ThrowError("Input file 1 is of an unsupported image format");
   }
-  VipsImage *image2 = NULL;
+  VImage image2;
   ImageType imageType2 = DetermineImageType(*Utf8String(info[1]));
   if (imageType2 != ImageType::UNKNOWN) {
-    image2 = InitImage(*Utf8String(info[1]), VIPS_ACCESS_SEQUENTIAL);
-    if (image2 == NULL) {
-      g_object_unref(hook);
+    try {
+      image2 = VImage::new_from_file(*Utf8String(info[1]));
+    } catch (...) {
       return ThrowError("Input file 2 has corrupt header");
-    } else {
-      vips_object_local(hook, image2);
     }
   } else {
-    g_object_unref(hook);
     return ThrowError("Input file 2 is of an unsupported image format");
   }
-
   // Ensure same number of channels
-  if (image1->Bands != image2->Bands) {
-    g_object_unref(hook);
+  if (image1.bands() != image2.bands()) {
     return ThrowError("mismatchedBands");
   }
   // Ensure same dimensions
-  if (image1->Xsize != image2->Xsize || image1->Ysize != image2->Ysize) {
-    g_object_unref(hook);
+  if (image1.width() != image2.width() || image1.height() != image2.height()) {
     return ThrowError("mismatchedDimensions");
   }
 
-  // Premultiply and remove alpha
-  if (HasAlpha(image1)) {
-    VipsImage *imagePremultiplied1;
-    if (Premultiply(hook, image1, &imagePremultiplied1)) {
-      g_object_unref(hook);
-      return ThrowError(vips_error_buffer());
-    }
-    vips_object_local(hook, imagePremultiplied1);
-    VipsImage *imagePremultipliedNoAlpha1;
-    if (vips_extract_band(image1, &imagePremultipliedNoAlpha1, 1, "n", image1->Bands - 1, NULL)) {
-      g_object_unref(hook);
-      return ThrowError(vips_error_buffer());
-    }
-    vips_object_local(hook, imagePremultipliedNoAlpha1);
-    image1 = imagePremultipliedNoAlpha1;
-  }
-  if (HasAlpha(image2)) {
-    VipsImage *imagePremultiplied2;
-    if (Premultiply(hook, image2, &imagePremultiplied2)) {
-      g_object_unref(hook);
-      return ThrowError(vips_error_buffer());
-    }
-    vips_object_local(hook, imagePremultiplied2);
-    VipsImage *imagePremultipliedNoAlpha2;
-    if (vips_extract_band(image2, &imagePremultipliedNoAlpha2, 1, "n", image2->Bands - 1, NULL)) {
-      g_object_unref(hook);
-      return ThrowError(vips_error_buffer());
-    }
-    vips_object_local(hook, imagePremultipliedNoAlpha2);
-    image2 = imagePremultipliedNoAlpha2;
-  }
-  // Calculate colour distance
-  VipsImage *difference;
-  if (vips_dE00(image1, image2, &difference, NULL)) {
-    g_object_unref(hook);
-    return ThrowError(vips_error_buffer());
-  }
-  vips_object_local(hook, difference);
-  // Extract maximum distance
   double maxColourDistance;
-  if (vips_max(difference, &maxColourDistance, NULL)) {
-    g_object_unref(hook);
-    return ThrowError(vips_error_buffer());
+  try {
+    // Premultiply and remove alpha
+    if (HasAlpha(image1)) {
+      image1 = image1.premultiply().extract_band(1, VImage::option()->set("n", image1.bands() - 1));
+    }
+    if (HasAlpha(image2)) {
+      image2 = image2.premultiply().extract_band(1, VImage::option()->set("n", image2.bands() - 1));
+    }
+    // Calculate colour distance
+    maxColourDistance = image1.dE00(image2).max();
+  } catch (VError err) {
+    return ThrowError(err.what());
   }
-  g_object_unref(hook);
+
+  // Clean up libvips' per-request data and threads
+  vips_error_clear();
+  vips_thread_shutdown();
+
   info.GetReturnValue().Set(New<Number>(maxColourDistance));
 }

src/utilities.h

@@ -6,6 +6,7 @@
 NAN_METHOD(cache);
 NAN_METHOD(concurrency);
 NAN_METHOD(counters);
+NAN_METHOD(simd);
 NAN_METHOD(libvipsVersion);
 NAN_METHOD(format);
 NAN_METHOD(_maxColourDistance);

test/bench/package.json

@@ -5,16 +5,17 @@
   "author": "Lovell Fuller <npm@lovell.info>",
   "description": "Benchmark and performance tests for sharp",
   "scripts": {
-    "test": "node perf && node random && node parallel"
+    "test": "VIPS_WARNING=0 node perf && node random && node parallel"
   },
   "devDependencies": {
+    "async": "^1.5.2",
+    "benchmark": "^2.1.0",
+    "gm": "^1.22.0",
     "imagemagick": "^0.1.3",
-    "imagemagick-native": "^1.8.0",
-    "gm": "^1.18.1",
-    "lwip": "^0.0.7",
-    "async": "^1.4.2",
-    "semver": "^5.0.1",
-    "benchmark": "^1.0.0"
+    "imagemagick-native": "^1.9.2",
+    "jimp": "^0.2.24",
+    "lwip": "^0.0.9",
+    "semver": "^5.1.0"
   },
   "license": "Apache-2.0",
   "engines": {

test/bench/parallel.js

@@ -1,5 +1,7 @@
 'use strict';
 
+process.env.UV_THREADPOOL_SIZE = 64;
+
 var assert = require('assert');
 var async = require('async');
 
@@ -10,12 +12,13 @@ var width = 720;
 var height = 480;
 
 sharp.concurrency(1);
+sharp.simd(true);
 
 var timer = setInterval(function() {
   console.dir(sharp.counters());
 }, 100);
 
-async.mapSeries([1, 1, 2, 4, 8, 16, 32, 64, 128], function(parallelism, next) {
+async.mapSeries([1, 1, 2, 4, 8, 16, 32, 64], function(parallelism, next) {
   var start = new Date().getTime();
   async.times(parallelism,
     function(id, callback) {

test/bench/random.js

@@ -8,12 +8,12 @@ var Benchmark = require('benchmark');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(false);
+sharp.simd(true);
+
 var min = 320;
 var max = 960;
 
-// Nearest equivalent to bilinear
-var magickFilter = 'Triangle';
-
 var randomDimension = function() {
   return Math.ceil(Math.random() * (max - min) + min);
 };
@@ -28,7 +28,7 @@ new Benchmark.Suite('random').add('imagemagick', {
       width: randomDimension(),
       height: randomDimension(),
       format: 'jpg',
-      filter: magickFilter
+      filter: 'Lanczos'
     }, function(err) {
       if (err) {
         throw err;
@@ -42,7 +42,7 @@ new Benchmark.Suite('random').add('imagemagick', {
   fn: function(deferred) {
     gm(fixtures.inputJpg)
       .resize(randomDimension(), randomDimension())
-      .filter(magickFilter)
+      .filter('Lanczos')
       .quality(80)
       .toBuffer(function (err, buffer) {
         if (err) {
@@ -56,19 +56,20 @@ new Benchmark.Suite('random').add('imagemagick', {
 }).add('sharp', {
   defer: true,
   fn: function(deferred) {
-    sharp(fixtures.inputJpg).resize(randomDimension(), randomDimension()).toBuffer(function(err, buffer) {
-      if (err) {
-        throw err;
-      } else {
-        assert.notStrictEqual(null, buffer);
-        deferred.resolve();
-      }
-    });
+    sharp(fixtures.inputJpg)
+      .resize(randomDimension(), randomDimension())
+      .toBuffer(function(err, buffer) {
+        if (err) {
+          throw err;
+        } else {
+          assert.notStrictEqual(null, buffer);
+          deferred.resolve();
+        }
+      });
   }
 }).on('cycle', function(event) {
   console.log(String(event.target));
 }).on('complete', function() {
-  var winner = this.filter('fastest').pluck('name');
+  var winner = this.filter('fastest').map('name');
   assert.strictEqual('sharp', String(winner), 'sharp was slower than ' + winner);
-  console.dir(sharp.cache());
 }).run();

test/fixtures/Wikimedia-logo.svg

@@ -1,17 +0,0 @@
-<?xml version="1.0" standalone="yes"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1"
-   id="Wikimedia logo"
-   viewBox="-599 -599 1198 1198" width="1024" height="1024">
-<defs>
-  <clipPath id="mask">
-    <path d="M 47.5,-87.5 v 425 h -95 v -425 l -552,-552 v 1250 h 1199 v -1250 z" />
-  </clipPath>
-</defs>
-<g clip-path="url(#mask)">
-  <circle id="green parts" fill="#396" r="336.5"/>
-  <circle id="blue arc" fill="none" stroke="#069" r="480.25" stroke-width="135.5" />
-</g>
-<circle fill="#900" cy="-379.5" r="184.5" id="red circle"/>
-</svg>

test/fixtures/check.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+      <path d="M30,76q6-14,13-26q6-12,14-23q8-12,13-17q3-4,6-6q1-1,5-2q8-1,12-1q1,0,1,1q0,1-1,2q-13,11-27,33q-14,21-24,44q-4,9-5,11q-1,2-9,2q-5,0-6-1q-1-1-5-6q-5-8-12-15q-3-4-3-6q0-2,4-5q3-2,6-2q3,0,8,3q5,4,10,14z" fill="green" />
+</svg>