Release v0.28.1

Fixes bug where certain input values for top/left parameters
in composite can conflict with clipping logic, resulting in
inaccurate alignment in output.

README.md

@@ -19,6 +19,14 @@ rotation, extraction, compositing and gamma correction are available.
 Most modern macOS, Windows and Linux systems running Node.js v10+
 do not require any additional install or runtime dependencies.
 
+## Documentation
+
+Visit [sharp.pixelplumbing.com](https://sharp.pixelplumbing.com/) for complete
+[installation instructions](https://sharp.pixelplumbing.com/install),
+[API documentation](https://sharp.pixelplumbing.com/api-constructor),
+[benchmark tests](https://sharp.pixelplumbing.com/performance) and
+[changelog](https://sharp.pixelplumbing.com/changelog).
+
 ## Examples
 
 ```sh
@@ -43,6 +51,7 @@ sharp(inputBuffer)
 sharp('input.jpg')
   .rotate()
   .resize(200)
+  .jpeg({ mozjpeg: true })
   .toBuffer()
   .then( data => { ... })
   .catch( err => { ... });
@@ -84,23 +93,15 @@ readableStream
   .pipe(writableStream);
 ```
 
-[![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.svg?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
-[![N-API v3](https://img.shields.io/badge/N--API-v3-green.svg)](https://nodejs.org/dist/latest/docs/api/n-api.html#n_api_n_api_version_matrix)
-
-### Documentation
-
-Visit [sharp.pixelplumbing.com](https://sharp.pixelplumbing.com/) for complete
-[installation instructions](https://sharp.pixelplumbing.com/install),
-[API documentation](https://sharp.pixelplumbing.com/api-constructor),
-[benchmark tests](https://sharp.pixelplumbing.com/performance) and
-[changelog](https://sharp.pixelplumbing.com/changelog).
-
-### Contributing
+## Contributing
 
 A [guide for contributors](https://github.com/lovell/sharp/blob/master/.github/CONTRIBUTING.md)
 covers reporting bugs, requesting features and submitting code changes.
 
-### Licensing
+[![Test Coverage](https://coveralls.io/repos/lovell/sharp/badge.svg?branch=master)](https://coveralls.io/r/lovell/sharp?branch=master)
+[![N-API v3](https://img.shields.io/badge/N--API-v3-green.svg)](https://nodejs.org/dist/latest/docs/api/n-api.html#n_api_n_api_version_matrix)
+
+## Licensing
 
 Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Lovell Fuller and contributors.
 

docs/README.md

@@ -50,6 +50,10 @@ no child processes are spawned and Promises/async/await are supported.
 
 ### Optimal
 
+The features of `mozjpeg` and `pngquant` can be used
+to optimise the file size of JPEG and PNG images respectively,
+without having to invoke separate `imagemin` processes.
+
 Huffman tables are optimised when generating JPEG output images
 without having to use separate command line tools like
 [jpegoptim](https://github.com/tjko/jpegoptim) and

docs/api-channel.md

@@ -18,18 +18,33 @@ Returns **Sharp**
 
 ## ensureAlpha
 
-Ensure alpha channel, if missing. The added alpha channel will be fully opaque. This is a no-op if the image already has an alpha channel.
+Ensure the output image has an alpha transparency channel.
+If missing, the added alpha channel will have the specified
+transparency level, defaulting to fully-opaque (1).
+This is a no-op if the image already has an alpha channel.
+
+### Parameters
+
+-   `alpha` **[number][1]** alpha transparency level (0=fully-transparent, 1=fully-opaque) (optional, default `1`)
 
 ### Examples
 
 ```javascript
-sharp('rgb.jpg')
+// rgba.png will be a 4 channel image with a fully-opaque alpha channel
+await sharp('rgb.jpg')
   .ensureAlpha()
-  .toFile('rgba.png', function(err, info) {
-    // rgba.png is a 4 channel image with a fully opaque alpha channel
-  });
+  .toFile('rgba.png')
 ```
 
+```javascript
+// rgba is a 4 channel image with a fully-transparent alpha channel
+const rgba = await sharp(rgb)
+  .ensureAlpha(0)
+  .toBuffer();
+```
+
+-   Throws **[Error][2]** Invalid alpha transparency level
+
 Returns **Sharp** 
 
 **Meta**
@@ -42,7 +57,7 @@ Extract a single channel from a multi-channel image.
 
 ### Parameters
 
--   `channel` **([number][1] \| [string][2])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
+-   `channel` **([number][1] \| [string][3])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
 
 ### Examples
 
@@ -56,7 +71,7 @@ sharp(input)
    });
 ```
 
--   Throws **[Error][3]** Invalid channel
+-   Throws **[Error][2]** Invalid channel
 
 Returns **Sharp** 
 
@@ -75,11 +90,11 @@ For raw pixel input, the `options` object should contain a `raw` attribute, whic
 
 ### Parameters
 
--   `images` **([Array][4]<([string][2] \| [Buffer][5])> | [string][2] \| [Buffer][5])** one or more images (file paths, Buffers).
+-   `images` **([Array][4]<([string][3] \| [Buffer][5])> | [string][3] \| [Buffer][5])** one or more images (file paths, Buffers).
 -   `options` **[Object][6]** image options, see `sharp()` constructor.
 
 
--   Throws **[Error][3]** Invalid parameters
+-   Throws **[Error][2]** Invalid parameters
 
 Returns **Sharp** 
 
@@ -89,7 +104,7 @@ Perform a bitwise boolean operation on all input image channels (bands) to produ
 
 ### Parameters
 
--   `boolOp` **[string][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+-   `boolOp` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
 
 ### Examples
 
@@ -103,15 +118,15 @@ sharp('3-channel-rgb-input.png')
   });
 ```
 
--   Throws **[Error][3]** Invalid parameters
+-   Throws **[Error][2]** Invalid parameters
 
 Returns **Sharp** 
 
 [1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
 
-[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
+[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
 
-[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
 
 [4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
 

docs/api-constructor.md

@@ -28,6 +28,7 @@ Implements the [stream.Duplex][1] class.
     -   `options.density` **[number][8]** number representing the DPI for vector images in the range 1 to 100000. (optional, default `72`)
     -   `options.pages` **[number][8]** number of pages to extract for multi-page input (GIF, WebP, AVIF, TIFF, PDF), use -1 for all pages. (optional, default `1`)
     -   `options.page` **[number][8]** page number to start extracting from for multi-page input (GIF, WebP, AVIF, TIFF, PDF), zero based. (optional, default `0`)
+    -   `options.subifd` **[number][8]** subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image. (optional, default `-1`)
     -   `options.level` **[number][8]** level to extract from a multi-level input (OpenSlide), zero based. (optional, default `0`)
     -   `options.animated` **[boolean][7]** Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`). (optional, default `false`)
     -   `options.raw` **[Object][6]?** describes raw pixel input image data. See `raw()` for pixel ordering.

docs/api-input.md

@@ -21,6 +21,7 @@ A `Promise` is returned when `callback` is not provided.
 -   `delay`: Delay in ms between each page in an animated image, provided as an array of integers.
 -   `pagePrimary`: Number of the primary page in a HEIF image
 -   `levels`: Details of each level in a multi-level image provided as an array of objects, requires libvips compiled with support for OpenSlide
+-   `subifds`: Number of Sub Image File Directories in an OME-TIFF image
 -   `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

docs/api-operation.md

@@ -169,13 +169,21 @@ Returns **Sharp**
 
 ## flatten
 
-Merge alpha transparency channel, if any, with a background.
+Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
 
 ### Parameters
 
 -   `options` **[Object][2]?** 
     -   `options.background` **([string][3] \| [Object][2])** background colour, parsed by the [color][4] module, defaults to black. (optional, default `{r:0,g:0,b:0}`)
 
+### Examples
+
+```javascript
+await sharp(rgbaInput)
+  .flatten('#F0A703')
+  .toBuffer();
+```
+
 Returns **Sharp** 
 
 ## gamma
@@ -263,7 +271,7 @@ Returns **Sharp**
 
 ## threshold
 
-Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
+Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
 
 ### Parameters
 

docs/api-output.md

@@ -87,10 +87,10 @@ sharp(input)
 ```
 
 ```javascript
-const data = await sharp('my-image.jpg')
+const { data, info } = await sharp('my-image.jpg')
   // output the raw pixels
   .raw()
-  .toBuffer();
+  .toBuffer({ resolveWithObject: true });
 
 // create a more type safe way to work with the raw pixel data
 // this will not copy the data, instead it will change `data`s underlying ArrayBuffer
@@ -98,7 +98,9 @@ const data = await sharp('my-image.jpg')
 const pixelArray = new Uint8ClampedArray(data.buffer);
 
 // When you are done changing the pixelArray, sharp takes the `pixelArray` as an input
-await sharp(pixelArray).toFile('my-changed-image.jpg');
+const { width, height, channels } = info;
+await sharp(pixelArray, { raw: { width, height, channels } })
+  .toFile('my-changed-image.jpg');
 ```
 
 Returns **[Promise][5]<[Buffer][8]>** when no callback is provided
@@ -117,6 +119,7 @@ sRGB colour space and strip all metadata, including the removal of any ICC profi
 -   `options` **[Object][6]?** 
     -   `options.orientation` **[number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
     -   `options.icc` **[string][2]?** filesystem path to output ICC profile, defaults to sRGB.
+    -   `options.exif` **[Object][6]<[Object][6]>** Object keyed by IFD0, IFD1 etc. of key/value string pairs to write as EXIF data. (optional, default `{}`)
 
 ### Examples
 
@@ -127,6 +130,19 @@ sharp('input.jpg')
   .then(info => { ... });
 ```
 
+```javascript
+// Set "IFD0-Copyright" in output EXIF metadata
+await sharp(input)
+  .withMetadata({
+    exif: {
+      IFD0: {
+        Copyright: 'Wernham Hogg'
+      }
+    }
+  })
+  .toBuffer();
+```
+
 -   Throws **[Error][4]** Invalid parameters
 
 Returns **Sharp** 
@@ -265,6 +281,13 @@ const data = await sharp(input)
   .toBuffer();
 ```
 
+```javascript
+// Optimise the file size of an animated WebP
+const outputWebp = await sharp(inputWebp, { animated: true })
+  .webp({ reductionEffort: 6 })
+  .toBuffer();
+```
+
 -   Throws **[Error][4]** Invalid options
 
 Returns **Sharp** 
@@ -423,6 +446,7 @@ Warning: multiple sharp instances concurrently producing tile output can expose
     -   `options.layout` **[string][2]** filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`. (optional, default `'dz'`)
     -   `options.centre` **[boolean][7]** centre image in tile. (optional, default `false`)
     -   `options.center` **[boolean][7]** alternative spelling of centre. (optional, default `false`)
+    -   `options.id` **[string][2]** when `layout` is `iiif`, sets the `@id` attribute of `info.json` (optional, default `'https://example.com/iiif'`)
 
 ### Examples
 

docs/api-resize.md

@@ -137,10 +137,10 @@ This operation will always occur after resizing and extraction, if any.
 ### Parameters
 
 -   `extend` **([number][8] \| [Object][9])** single pixel count to add to all edges or an Object with per-edge counts
-    -   `extend.top` **[number][8]?** 
-    -   `extend.left` **[number][8]?** 
-    -   `extend.bottom` **[number][8]?** 
-    -   `extend.right` **[number][8]?** 
+    -   `extend.top` **[number][8]**  (optional, default `0`)
+    -   `extend.left` **[number][8]**  (optional, default `0`)
+    -   `extend.bottom` **[number][8]**  (optional, default `0`)
+    -   `extend.right` **[number][8]**  (optional, default `0`)
     -   `extend.background` **([String][10] \| [Object][9])** background colour, parsed by the [color][11] module, defaults to black without transparency. (optional, default `{r:0,g:0,b:0,alpha:1}`)
 
 ### Examples
@@ -160,6 +160,16 @@ sharp(input)
   ...
 ```
 
+```javascript
+// Add a row of 10 red pixels to the bottom
+sharp(input)
+  .extend({
+    bottom: 10,
+    background: 'red'
+  })
+  ...
+```
+
 -   Throws **[Error][13]** Invalid parameters
 
 Returns **Sharp** 

docs/api-utility.md

@@ -84,8 +84,12 @@ Returns **[Object][1]**
 
 Gets or, when a concurrency is provided, sets
 the number of threads _libvips'_ should create to process each image.
-The default value is the number of CPU cores.
-A value of `0` will reset to this default.
+
+The default value is the number of CPU cores,
+except when using glibc-based Linux without jemalloc,
+where the default is `1` to help reduce memory fragmentation.
+
+A value of `0` will reset this to the number of CPU cores.
 
 The maximum number of images that can be processed in parallel
 is limited by libuv's `UV_THREADPOOL_SIZE` environment variable.

docs/changelog.md

@@ -4,7 +4,20 @@
 
 Requires libvips v8.10.6
 
-### v0.28.0 - TBD
+### v0.28.1 - 5th April 2021
+
+* Ensure all installation errors are logged with a more obvious prefix.
+
+* Allow `withMetadata` to set and update EXIF metadata.
+  [#650](https://github.com/lovell/sharp/issues/650)
+
+* Add support for OME-TIFF Sub Image File Directories (subIFD).
+  [#2557](https://github.com/lovell/sharp/issues/2557)
+
+* Allow `ensureAlpha` to set the alpha transparency level.
+  [#2634](https://github.com/lovell/sharp/issues/2634)
+
+### v0.28.0 - 29th March 2021
 
 * Prebuilt binaries now include mozjpeg and libimagequant (BSD 2-Clause).
 
@@ -16,10 +29,24 @@ Requires libvips v8.10.6
 
 * Reduce concurrency on glibc-based Linux when using the default memory allocator to help prevent fragmentation.
 
+* Default missing edge properties of extend operation to zero.
+  [#2578](https://github.com/lovell/sharp/issues/2578)
+
+* Ensure composite does not clip top and left offsets.
+  [#2594](https://github.com/lovell/sharp/pull/2594)
+  [@SHG42](https://github.com/SHG42)
+
+* Improve error handling of network failure at install time.
+  [#2608](https://github.com/lovell/sharp/pull/2608)
+  [@abradley](https://github.com/abradley)
+
 * Ensure `@id` attribute can be set for IIIF tile-based output.
   [#2612](https://github.com/lovell/sharp/issues/2612)
   [@edsilv](https://github.com/edsilv)
 
+* Ensure composite replicates the correct number of tiles for centred gravities.
+  [#2626](https://github.com/lovell/sharp/issues/2626)
+
 ## v0.27 - *avif*
 
 Requires libvips v8.10.5

docs/index.html

@@ -19,7 +19,7 @@
   <link rel="apple-touch-icon-precomposed" sizes="72x72" href="https://pixel.plumbing/px/72x72/sharp-logo.svg">
   <link rel="apple-touch-icon-precomposed" href="https://pixel.plumbing/px/57x57/sharp-logo.svg">
   <link rel="author" href="/humans.txt" type="text/plain">
-  <link rel="preload" href="https://cdn.jsdelivr.net/gh/lovell/sharp@v0.27.2/docs/README.md" as="fetch" type="text/markdown" crossorigin>
+  <link rel="preload" href="https://cdn.jsdelivr.net/gh/lovell/sharp@v0.28.1/docs/README.md" as="fetch" type="text/markdown" crossorigin>
   <link rel="preload" href="https://cdn.jsdelivr.net/gh/lovell/sharp@master/docs/image/sharp-logo.svg" as="image" type="image/svg+xml" crossorigin>
   <link rel="dns-prefetch" href="https://pixel.plumbing">
   <link rel="dns-prefetch" href="https://www.google-analytics.com">
@@ -139,7 +139,7 @@
         docuteApiTitlePlugin,
         docuteApiSearchPlugin
       ],
-      sourcePath: 'https://cdn.jsdelivr.net/gh/lovell/sharp@v0.27.2/docs',
+      sourcePath: 'https://cdn.jsdelivr.net/gh/lovell/sharp@v0.28.1/docs',
       nav: [
         {
           title: 'Funding',

docs/install.md

@@ -23,7 +23,7 @@ Node.js v10+ on the most common platforms:
 * Windows x64
 * Windows x86
 
-An ~8MB tarball containing libvips and its most commonly used dependencies
+An ~7.5MB tarball containing libvips and its most commonly used dependencies
 is downloaded via HTTPS and stored within `node_modules/sharp/vendor` during `npm install`.
 
 This provides support for the
@@ -102,6 +102,10 @@ To install the prebuilt sharp binaries from a custom URL,
 set the `sharp_binary_host` npm config option
 or the `npm_config_sharp_binary_host` environment variable.
 
+To install the prebuilt sharp binaries from a directory on the local filesystem,
+set the `sharp_local_prebuilds` npm config option
+or the `npm_config_sharp_local_prebuilds` environment variable.
+
 To install the prebuilt libvips binaries from a custom URL,
 set the `sharp_libvips_binary_host` npm config option
 or the `npm_config_sharp_libvips_binary_host` environment variable.
@@ -149,6 +153,23 @@ pkg install -y pkgconf vips
 cd /usr/ports/graphics/vips/ && make install clean
 ```
 
+## Linux memory allocator
+
+The default memory allocator on most glibc-based Linux systems
+(e.g. Debian, Red Hat) is unsuitable for long-running, multi-threaded
+processes that involve lots of small memory allocations.
+
+For this reason, by default, sharp will limit the use of thread-based
+[concurrency](api-utility#concurrency) when the glibc allocator is
+detected at runtime.
+
+To help avoid fragmentation and improve performance on these systems,
+the use of an alternative memory allocator such as
+[jemalloc](https://github.com/jemalloc/jemalloc) is recommended.
+
+Those using musl-based Linux (e.g. Alpine) and non-Linux systems are
+unaffected.
+
 ## Heroku
 
 Add the
@@ -161,8 +182,6 @@ to `false` when using the `yarn` package manager.
 
 ## AWS Lambda
 
-Set the Lambda runtime to `nodejs12.x`.
-
 The binaries in the `node_modules` directory of the
 [deployment package](https://docs.aws.amazon.com/lambda/latest/dg/nodejs-package.html)
 must be for the Linux x64 platform.

docs/performance.md

@@ -5,10 +5,10 @@ A test to benchmark the performance of this module relative to alternatives.
 ## The contenders
 
 * [jimp](https://www.npmjs.com/package/jimp) v0.16.1 - Image processing in pure JavaScript. Provides bicubic interpolation.
-* [mapnik](https://www.npmjs.org/package/mapnik) v4.5.5 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
+* [mapnik](https://www.npmjs.org/package/mapnik) v4.5.6 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
 * [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
 * [gm](https://www.npmjs.com/package/gm) v1.23.1 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
-* sharp v0.27.0 / libvips v8.10.5 - Caching within libvips disabled to ensure a fair comparison.
+* sharp v0.28.0 / libvips v8.10.6 - Caching within libvips disabled to ensure a fair comparison.
 
 ## The task
 
@@ -18,25 +18,25 @@ then compress to JPEG at a "quality" setting of 80.
 
 ## Test environment
 
-* AWS EC2 eu-west-1 [c5d.large](https://aws.amazon.com/ec2/instance-types/c5/) (2x Xeon Platinum 8275CL CPU @ 3.00GHz)
-* Ubuntu 20.10 (ami-046cdbcee95cdd75c)
-* Node.js v14.15.3
+* AWS EC2 eu-west-1 [c5ad.xlarge](https://aws.amazon.com/ec2/instance-types/c5/) (4x AMD EPYC 7R32)
+* Ubuntu 20.10 (ami-03f10415e8b0bfb86)
+* Node.js v14.16.0
 
 ## Results
 
 | Module             | Input  | Output | Ops/sec | Speed-up |
 | :----------------- | :----- | :----- | ------: | -------: |
-| jimp               | buffer | buffer |    0.77 |      1.0 |
-| mapnik             | buffer | buffer |    3.39 |      4.4 |
-| gm                 | buffer | buffer |    4.30 |      5.6 |
-| gm                 | file   | file   |    4.33 |      5.6 |
-| imagemagick        | file   | file   |    4.39 |      5.7 |
-| sharp              | stream | stream |   23.81 |     30.9 |
-| sharp              | file   | file   |   25.09 |     32.6 |
-| sharp              | buffer | buffer |   25.60 |     33.2 |
+| jimp               | buffer | buffer |    0.78 |      1.0 |
+| mapnik             | buffer | buffer |    3.39 |      4.3 |
+| gm                 | buffer | buffer |    7.84 |     10.1 |
+| gm                 | file   | file   |    9.24 |     11.8 |
+| imagemagick        | file   | file   |    9.37 |     12.0 |
+| sharp              | stream | stream |   26.84 |     34.4 |
+| sharp              | file   | file   |   29.76 |     38.2 |
+| sharp              | buffer | buffer |   31.60 |     40.5 |
 
 Greater libvips performance can be expected with caching enabled (default)
-and using 4+ core machines, especially those with larger L1/L2 CPU caches.
+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.
 
@@ -51,7 +51,7 @@ brew install mapnik
 ```
 
 ```sh
-sudo apt-get install imagemagick libmagick++-dev graphicsmagick libmapnik-dev
+sudo apt-get install build-essential imagemagick libmagick++-dev graphicsmagick libmapnik-dev
 ```
 
 ```sh
@@ -61,7 +61,7 @@ sudo yum install ImageMagick-devel ImageMagick-c++-devel GraphicsMagick mapnik-d
 ```sh
 git clone https://github.com/lovell/sharp.git
 cd sharp
-npm install
+npm install --build-from-source
 cd test/bench
 npm install
 npm test

docs/search-index/extract.js

@@ -8,7 +8,7 @@ const extractDescription = (str) =>
     .replace(/\s+/g, ' ')
     .replace(/[^A-Za-z0-9_/\-,. ]/g, '')
     .replace(/\s+/g, ' ')
-    .substr(0, 140)
+    .substr(0, 180)
     .trim();
 
 const extractKeywords = (str) =>

docs/search-index/stop-words.js

@@ -4,14 +4,19 @@ module.exports = [
   'about',
   'after',
   'all',
+  'allows',
   'already',
+  'also',
   'alternative',
   'always',
   'and',
   'any',
   'are',
+  'based',
   'been',
   'before',
+  'both',
+  'call',
   'can',
   'containing',
   'default',
@@ -30,7 +35,10 @@ module.exports = [
   'have',
   'how',
   'image',
+  'involve',
   'its',
+  'least',
+  'lots',
   'may',
   'more',
   'most',
@@ -40,17 +48,24 @@ module.exports = [
   'not',
   'occur',
   'occurs',
+  'options',
   'over',
   'perform',
   'performs',
   'provide',
   'provided',
+  'ready',
+  'same',
+  'see',
   'set',
   'sets',
   'should',
+  'since',
   'spelling',
+  'such',
   'support',
   'supported',
+  'sure',
   'take',
   'that',
   'the',
@@ -59,6 +74,9 @@ module.exports = [
   'therefore',
   'these',
   'this',
+  'under',
+  'unless',
+  'until',
   'use',
   'used',
   'using',
@@ -69,5 +87,6 @@ module.exports = [
   'while',
   'will',
   'with',
-  'without'
+  'without',
+  'you'
 ];

install/libvips.js

@@ -145,7 +145,9 @@ try {
           tmpFileStream
             .on('error', function (err) {
               // Clean up temporary file
-              fs.unlinkSync(tarPathTemp);
+              try {
+                fs.unlinkSync(tarPathTemp);
+              } catch (e) {}
               fail(err);
             })
             .on('close', function () {
@@ -157,7 +159,7 @@ try {
                 fs.copyFileSync(tarPathTemp, tarPathCache);
                 fs.unlinkSync(tarPathTemp);
               }
-              extractTarball(tarPathCache);
+              extractTarball(tarPathCache, platformAndArch);
             });
         }
       });

lib/channel.js

@@ -30,21 +30,39 @@ function removeAlpha () {
 }
 
 /**
- * Ensure alpha channel, if missing. The added alpha channel will be fully opaque. This is a no-op if the image already has an alpha channel.
+ * Ensure the output image has an alpha transparency channel.
+ * If missing, the added alpha channel will have the specified
+ * transparency level, defaulting to fully-opaque (1).
+ * This is a no-op if the image already has an alpha channel.
  *
  * @since 0.21.2
  *
  * @example
- * sharp('rgb.jpg')
+ * // rgba.png will be a 4 channel image with a fully-opaque alpha channel
+ * await sharp('rgb.jpg')
  *   .ensureAlpha()
- *   .toFile('rgba.png', function(err, info) {
- *     // rgba.png is a 4 channel image with a fully opaque alpha channel
- *   });
+ *   .toFile('rgba.png')
  *
+ * @example
+ * // rgba is a 4 channel image with a fully-transparent alpha channel
+ * const rgba = await sharp(rgb)
+ *   .ensureAlpha(0)
+ *   .toBuffer();
+ *
+ * @param {number} [alpha=1] - alpha transparency level (0=fully-transparent, 1=fully-opaque)
  * @returns {Sharp}
+ * @throws {Error} Invalid alpha transparency level
  */
-function ensureAlpha () {
-  this.options.ensureAlpha = true;
+function ensureAlpha (alpha) {
+  if (is.defined(alpha)) {
+    if (is.number(alpha) && is.inRange(alpha, 0, 1)) {
+      this.options.ensureAlpha = alpha;
+    } else {
+      throw is.invalidParameterError('alpha', 'number between 0 and 1', alpha);
+    }
+  } else {
+    this.options.ensureAlpha = 1;
+  }
   return this;
 }
 

lib/constructor.js

@@ -132,6 +132,7 @@ const debuglog = util.debuglog('sharp');
  * @param {number} [options.density=72] - number representing the DPI for vector images in the range 1 to 100000.
  * @param {number} [options.pages=1] - number of pages to extract for multi-page input (GIF, WebP, AVIF, TIFF, PDF), use -1 for all pages.
  * @param {number} [options.page=0] - page number to start extracting from for multi-page input (GIF, WebP, AVIF, TIFF, PDF), zero based.
+ * @param {number} [options.subifd=-1] - subIFD (Sub Image File Directory) to extract for OME-TIFF, defaults to main image.
  * @param {number} [options.level=0] - level to extract from a multi-level input (OpenSlide), zero based.
  * @param {boolean} [options.animated=false] - Set to `true` to read all frames/pages of an animated image (equivalent of setting `pages` to `-1`).
  * @param {Object} [options.raw] - describes raw pixel input image data. See `raw()` for pixel ordering.
@@ -221,7 +222,7 @@ const Sharp = function (input, options) {
     joinChannelIn: [],
     extractChannel: -1,
     removeAlpha: false,
-    ensureAlpha: false,
+    ensureAlpha: -1,
     colourspace: 'srgb',
     composite: [],
     // output
@@ -231,6 +232,7 @@ const Sharp = function (input, options) {
     withMetadata: false,
     withMetadataOrientation: -1,
     withMetadataIcc: '',
+    withMetadataStrs: {},
     resolveWithObject: false,
     // output format
     jpegQuality: 80,

lib/input.js

@@ -9,9 +9,9 @@ const sharp = require('../build/Release/sharp.node');
  * @private
  */
 function _inputOptionsFromObject (obj) {
-  const { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages } = obj;
-  return [raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages].some(is.defined)
-    ? { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages }
+  const { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages, subifd } = obj;
+  return [raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages, subifd].some(is.defined)
+    ? { raw, density, limitInputPixels, sequentialRead, failOnError, animated, page, pages, subifd }
     : undefined;
 }
 
@@ -131,6 +131,14 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
         throw is.invalidParameterError('level', 'integer between 0 and 256', inputOptions.level);
       }
     }
+    // Sub Image File Directory (TIFF)
+    if (is.defined(inputOptions.subifd)) {
+      if (is.integer(inputOptions.subifd) && is.inRange(inputOptions.subifd, -1, 100000)) {
+        inputDescriptor.subifd = inputOptions.subifd;
+      } else {
+        throw is.invalidParameterError('subifd', 'integer between -1 and 100000', inputOptions.subifd);
+      }
+    }
     // Create new image
     if (is.defined(inputOptions.create)) {
       if (
@@ -255,6 +263,7 @@ function _isStreamInput () {
  * - `delay`: Delay in ms between each page in an animated image, provided as an array of integers.
  * - `pagePrimary`: Number of the primary page in a HEIF image
  * - `levels`: Details of each level in a multi-level image provided as an array of objects, requires libvips compiled with support for OpenSlide
+ * - `subifds`: Number of Sub Image File Directories in an OME-TIFF image
  * - `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

lib/libvips.js

@@ -39,7 +39,7 @@ const cachePath = function () {
 
 const log = function (item) {
   if (item instanceof Error) {
-    console.error(`sharp: ${item.message}`);
+    console.error(`sharp: Installation error: ${item.message}`);
   } else {
     console.log(`sharp: ${item}`);
   }

lib/operation.js

@@ -268,7 +268,13 @@ function blur (sigma) {
 }
 
 /**
- * Merge alpha transparency channel, if any, with a background.
+ * Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
+ *
+ * @example
+ * await sharp(rgbaInput)
+ *   .flatten('#F0A703')
+ *   .toBuffer();
+ *
  * @param {Object} [options]
  * @param {string|Object} [options.background={r: 0, g: 0, b: 0}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black.
  * @returns {Sharp}
@@ -396,7 +402,7 @@ function convolve (kernel) {
 }
 
 /**
- * Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
+ * Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
  * @param {number} [threshold=128] - a value in the range 0-255 representing the level at which the threshold will be applied.
  * @param {Object} [options]
  * @param {Boolean} [options.greyscale=true] - convert to single channel greyscale.

lib/output.js

@@ -105,10 +105,10 @@ function toFile (fileOut, callback) {
  *   .catch(err => { ... });
  *
  * @example
- * const data = await sharp('my-image.jpg')
+ * const { data, info } = await sharp('my-image.jpg')
  *   // output the raw pixels
  *   .raw()
- *   .toBuffer();
+ *   .toBuffer({ resolveWithObject: true });
  *
  * // create a more type safe way to work with the raw pixel data
  * // this will not copy the data, instead it will change `data`s underlying ArrayBuffer
@@ -116,7 +116,9 @@ function toFile (fileOut, callback) {
  * const pixelArray = new Uint8ClampedArray(data.buffer);
  *
  * // When you are done changing the pixelArray, sharp takes the `pixelArray` as an input
- * await sharp(pixelArray).toFile('my-changed-image.jpg');
+ * const { width, height, channels } = info;
+ * await sharp(pixelArray, { raw: { width, height, channels } })
+ *   .toFile('my-changed-image.jpg');
  *
  * @param {Object} [options]
  * @param {boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
@@ -146,9 +148,22 @@ function toBuffer (options, callback) {
  *   .toFile('output-with-metadata.jpg')
  *   .then(info => { ... });
  *
+ * @example
+ * // Set "IFD0-Copyright" in output EXIF metadata
+ * await sharp(input)
+ *   .withMetadata({
+ *     exif: {
+ *       IFD0: {
+ *         Copyright: 'Wernham Hogg'
+ *       }
+ *     }
+ *   })
+ *   .toBuffer();
+ *
  * @param {Object} [options]
  * @param {number} [options.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
  * @param {string} [options.icc] filesystem path to output ICC profile, defaults to sRGB.
+ * @param {Object<Object>} [options.exif={}] Object keyed by IFD0, IFD1 etc. of key/value string pairs to write as EXIF data.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -169,6 +184,25 @@ function withMetadata (options) {
         throw is.invalidParameterError('icc', 'string filesystem path to ICC profile', options.icc);
       }
     }
+    if (is.defined(options.exif)) {
+      if (is.object(options.exif)) {
+        for (const [ifd, entries] of Object.entries(options.exif)) {
+          if (is.object(entries)) {
+            for (const [k, v] of Object.entries(entries)) {
+              if (is.string(v)) {
+                this.options.withMetadataStrs[`exif-${ifd.toLowerCase()}-${k}`] = v;
+              } else {
+                throw is.invalidParameterError(`exif.${ifd}.${k}`, 'string', v);
+              }
+            }
+          } else {
+            throw is.invalidParameterError(`exif.${ifd}`, 'object', entries);
+          }
+        }
+      } else {
+        throw is.invalidParameterError('exif', 'object', options.exif);
+      }
+    }
   }
   return this;
 }
@@ -381,6 +415,12 @@ function png (options) {
  *   .webp({ lossless: true })
  *   .toBuffer();
  *
+ * @example
+ * // Optimise the file size of an animated WebP
+ * const outputWebp = await sharp(inputWebp, { animated: true })
+ *   .webp({ reductionEffort: 6 })
+ *   .toBuffer();
+ *
  * @param {Object} [options] - output options
  * @param {number} [options.quality=80] - quality, integer 1-100
  * @param {number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100

lib/resize.js

@@ -302,11 +302,20 @@ function resize (width, height, options) {
  *   })
  *   ...
  *
+* @example
+ * // Add a row of 10 red pixels to the bottom
+ * sharp(input)
+ *   .extend({
+ *     bottom: 10,
+ *     background: 'red'
+ *   })
+ *   ...
+ *
  * @param {(number|Object)} extend - single pixel count to add to all edges or an Object with per-edge counts
- * @param {number} [extend.top]
- * @param {number} [extend.left]
- * @param {number} [extend.bottom]
- * @param {number} [extend.right]
+ * @param {number} [extend.top=0]
+ * @param {number} [extend.left=0]
+ * @param {number} [extend.bottom=0]
+ * @param {number} [extend.right=0]
  * @param {String|Object} [extend.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -317,17 +326,35 @@ function extend (extend) {
     this.options.extendBottom = extend;
     this.options.extendLeft = extend;
     this.options.extendRight = extend;
-  } else if (
-    is.object(extend) &&
-    is.integer(extend.top) && extend.top >= 0 &&
-    is.integer(extend.bottom) && extend.bottom >= 0 &&
-    is.integer(extend.left) && extend.left >= 0 &&
-    is.integer(extend.right) && extend.right >= 0
-  ) {
-    this.options.extendTop = extend.top;
-    this.options.extendBottom = extend.bottom;
-    this.options.extendLeft = extend.left;
-    this.options.extendRight = extend.right;
+  } else if (is.object(extend)) {
+    if (is.defined(extend.top)) {
+      if (is.integer(extend.top) && extend.top >= 0) {
+        this.options.extendTop = extend.top;
+      } else {
+        throw is.invalidParameterError('top', 'positive integer', extend.top);
+      }
+    }
+    if (is.defined(extend.bottom)) {
+      if (is.integer(extend.bottom) && extend.bottom >= 0) {
+        this.options.extendBottom = extend.bottom;
+      } else {
+        throw is.invalidParameterError('bottom', 'positive integer', extend.bottom);
+      }
+    }
+    if (is.defined(extend.left)) {
+      if (is.integer(extend.left) && extend.left >= 0) {
+        this.options.extendLeft = extend.left;
+      } else {
+        throw is.invalidParameterError('left', 'positive integer', extend.left);
+      }
+    }
+    if (is.defined(extend.right)) {
+      if (is.integer(extend.right) && extend.right >= 0) {
+        this.options.extendRight = extend.right;
+      } else {
+        throw is.invalidParameterError('right', 'positive integer', extend.right);
+      }
+    }
     this._setBackgroundColourOption('extendBackground', extend.background);
   } else {
     throw is.invalidParameterError('extend', 'integer or object', extend);

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sharp",
   "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images",
-  "version": "0.28.0-alpha1",
+  "version": "0.28.1",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://github.com/lovell/sharp",
   "contributors": [
@@ -80,7 +80,7 @@
     "install": "(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)",
     "clean": "rm -rf node_modules/ build/ vendor/ .nyc_output/ coverage/ test/fixtures/output.*",
     "test": "semistandard && cpplint && npm run test-unit && npm run test-licensing",
-    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=5000 --timeout=60000 ./test/unit/*.js",
+    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=1000 --timeout=60000 ./test/unit/*.js",
     "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;MIT\"",
     "test-coverage": "./test/coverage/report.sh",
     "test-leak": "./test/leak/leak.sh",
@@ -120,8 +120,8 @@
     "color": "^3.1.3",
     "detect-libc": "^1.0.3",
     "node-addon-api": "^3.1.0",
-    "prebuild-install": "^6.0.1",
-    "semver": "^7.3.4",
+    "prebuild-install": "^6.1.1",
+    "semver": "^7.3.5",
     "simple-get": "^3.1.0",
     "tar-fs": "^2.1.1",
     "tunnel-agent": "^0.6.0"
@@ -130,11 +130,11 @@
     "async": "^3.2.0",
     "cc": "^3.0.1",
     "decompress-zip": "^0.3.3",
-    "documentation": "^13.1.1",
+    "documentation": "^13.2.0",
     "exif-reader": "^1.0.3",
     "icc": "^2.0.0",
     "license-checker": "^25.0.1",
-    "mocha": "^8.3.1",
+    "mocha": "^8.3.2",
     "mock-fs": "^4.13.0",
     "nyc": "^15.1.0",
     "prebuild": "^10.0.1",
@@ -143,7 +143,7 @@
   },
   "license": "Apache-2.0",
   "config": {
-    "libvips": "8.10.6-alpha3",
+    "libvips": "8.10.6",
     "runtime": "napi",
     "target": 3
   },

src/common.cc

@@ -36,6 +36,9 @@ namespace sharp {
   std::string AttrAsStr(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::String>();
   }
+  std::string AttrAsStr(Napi::Object obj, unsigned int const attr) {
+    return obj.Get(attr).As<Napi::String>();
+  }
   uint32_t AttrAsUint32(Napi::Object obj, std::string attr) {
     return obj.Get(attr).As<Napi::Number>().Uint32Value();
   }
@@ -104,6 +107,10 @@ namespace sharp {
     if (HasAttr(input, "level")) {
       descriptor->level = AttrAsUint32(input, "level");
     }
+    // subIFD (OME-TIFF)
+    if (HasAttr(input, "subifd")) {
+      descriptor->subifd = AttrAsInt32(input, "subifd");
+    }
     // Create new image
     if (HasAttr(input, "createChannels")) {
       descriptor->createChannels = AttrAsUint32(input, "createChannels");
@@ -213,6 +220,8 @@ namespace sharp {
     { "VipsForeignLoadTiffBuffer", ImageType::TIFF },
     { "VipsForeignLoadGifFile", ImageType::GIF },
     { "VipsForeignLoadGifBuffer", ImageType::GIF },
+    { "VipsForeignLoadNsgifFile", ImageType::GIF },
+    { "VipsForeignLoadNsgifBuffer", ImageType::GIF },
     { "VipsForeignLoadSvgFile", ImageType::SVG },
     { "VipsForeignLoadSvgBuffer", ImageType::SVG },
     { "VipsForeignLoadHeifFile", ImageType::HEIF },
@@ -317,6 +326,9 @@ namespace sharp {
             if (imageType == ImageType::OPENSLIDE) {
               option->set("level", descriptor->level);
             }
+            if (imageType == ImageType::TIFF) {
+              option->set("subifd", descriptor->subifd);
+            }
             image = VImage::new_from_buffer(descriptor->buffer, descriptor->bufferLength, nullptr, option);
             if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
               image = SetDensity(image, descriptor->density);
@@ -389,6 +401,9 @@ namespace sharp {
             if (imageType == ImageType::OPENSLIDE) {
               option->set("level", descriptor->level);
             }
+            if (imageType == ImageType::TIFF) {
+              option->set("subifd", descriptor->subifd);
+            }
             image = VImage::new_from_file(descriptor->file.data(), option);
             if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
               image = SetDensity(image, descriptor->density);
@@ -797,10 +812,10 @@ namespace sharp {
   /*
     Ensures alpha channel, if missing.
   */
-  VImage EnsureAlpha(VImage image) {
+  VImage EnsureAlpha(VImage image, double const value) {
     if (!HasAlpha(image)) {
       std::vector<double> alpha;
-      alpha.push_back(sharp::MaximumImageAlpha(image.interpretation()));
+      alpha.push_back(value * sharp::MaximumImageAlpha(image.interpretation()));
       image = image.bandjoin_const(alpha);
     }
     return image;

src/common.h

@@ -60,6 +60,7 @@ namespace sharp {
     int pages;
     int page;
     int level;
+    int subifd;
     int createChannels;
     int createWidth;
     int createHeight;
@@ -82,6 +83,7 @@ namespace sharp {
       pages(1),
       page(0),
       level(0),
+      subifd(-1),
       createChannels(0),
       createWidth(0),
       createHeight(0),
@@ -93,6 +95,7 @@ namespace sharp {
   // Convenience methods to access the attributes of a Napi::Object
   bool HasAttr(Napi::Object obj, std::string attr);
   std::string AttrAsStr(Napi::Object obj, std::string attr);
+  std::string AttrAsStr(Napi::Object obj, unsigned int const attr);
   uint32_t AttrAsUint32(Napi::Object obj, std::string attr);
   int32_t AttrAsInt32(Napi::Object obj, std::string attr);
   int32_t AttrAsInt32(Napi::Object obj, unsigned int const attr);
@@ -296,7 +299,7 @@ namespace sharp {
   /*
     Ensures alpha channel, if missing.
   */
-  VImage EnsureAlpha(VImage image);
+  VImage EnsureAlpha(VImage image, double const value);
 
 }  // namespace sharp
 

src/metadata.cc

@@ -86,6 +86,9 @@ class MetadataWorker : public Napi::AsyncWorker {
           baton->levels.push_back(std::pair<int, int>(width, height));
         }
       }
+      if (image.get_typeof(VIPS_META_N_SUBIFDS) == G_TYPE_INT) {
+        baton->subifds = image.get_int(VIPS_META_N_SUBIFDS);
+      }
       baton->hasProfile = sharp::HasProfile(image);
       // Derived attributes
       baton->hasAlpha = sharp::HasAlpha(image);
@@ -203,6 +206,9 @@ class MetadataWorker : public Napi::AsyncWorker {
         }
         info.Set("levels", levels);
       }
+      if (baton->subifds > 0) {
+        info.Set("subifds", baton->subifds);
+      }
       info.Set("hasProfile", baton->hasProfile);
       info.Set("hasAlpha", baton->hasAlpha);
       if (baton->orientation > 0) {

src/metadata.h

@@ -41,6 +41,7 @@ struct MetadataBaton {
   int pagePrimary;
   std::string compression;
   std::vector<std::pair<int, int>> levels;
+  int subifds;
   bool hasProfile;
   bool hasAlpha;
   int orientation;
@@ -68,6 +69,7 @@ struct MetadataBaton {
     pageHeight(0),
     loop(-1),
     pagePrimary(-1),
+    subifds(0),
     hasProfile(false),
     hasAlpha(false),
     orientation(0),

src/pipeline.cc

@@ -346,7 +346,7 @@ class PipelineWorker : public Napi::AsyncWorker {
       bool const shouldModulate = baton->brightness != 1.0 || baton->saturation != 1.0 || baton->hue != 0.0;
 
       if (shouldComposite && !sharp::HasAlpha(image)) {
-        image = sharp::EnsureAlpha(image);
+        image = sharp::EnsureAlpha(image, 1);
       }
 
       bool const shouldPremultiplyAlpha = sharp::HasAlpha(image) &&
@@ -562,9 +562,17 @@ class PipelineWorker : public Napi::AsyncWorker {
             // Use gravity in overlay
             if (compositeImage.width() <= baton->width) {
               across = static_cast<int>(ceil(static_cast<double>(image.width()) / compositeImage.width()));
+              // Ensure odd number of tiles across when gravity is centre, north or south
+              if (composite->gravity == 0 || composite->gravity == 1 || composite->gravity == 3) {
+                across |= 1;
+              }
             }
             if (compositeImage.height() <= baton->height) {
               down = static_cast<int>(ceil(static_cast<double>(image.height()) / compositeImage.height()));
+              // Ensure odd number of tiles down when gravity is centre, east or west
+              if (composite->gravity == 0 || composite->gravity == 2 || composite->gravity == 4) {
+                down |= 1;
+              }
             }
             if (across != 0 || down != 0) {
               int left;
@@ -586,7 +594,7 @@ class PipelineWorker : public Napi::AsyncWorker {
           // Ensure image to composite is sRGB with premultiplied alpha
           compositeImage = compositeImage.colourspace(VIPS_INTERPRETATION_sRGB);
           if (!sharp::HasAlpha(compositeImage)) {
-            compositeImage = sharp::EnsureAlpha(compositeImage);
+            compositeImage = sharp::EnsureAlpha(compositeImage, 1);
           }
           if (!composite->premultiplied) compositeImage = compositeImage.premultiply();
           // Calculate position
@@ -594,8 +602,13 @@ class PipelineWorker : public Napi::AsyncWorker {
           int top;
           if (composite->hasOffset) {
             // Composite image at given offsets
-            std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
-              compositeImage.width(), compositeImage.height(), composite->left, composite->top);
+            if (composite->tile) {
+              std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
+                compositeImage.width(), compositeImage.height(), composite->left, composite->top);
+            } else {
+              left = composite->left;
+              top = composite->top;
+            }
           } else {
             // Composite image with given gravity
             std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
@@ -678,8 +691,8 @@ class PipelineWorker : public Napi::AsyncWorker {
       }
 
       // Ensure alpha channel, if missing
-      if (baton->ensureAlpha) {
-        image = sharp::EnsureAlpha(image);
+      if (baton->ensureAlpha != -1) {
+        image = sharp::EnsureAlpha(image, baton->ensureAlpha);
       }
 
       // Convert image to sRGB, if not already
@@ -704,11 +717,17 @@ class PipelineWorker : public Napi::AsyncWorker {
             ->set("input_profile", "srgb")
             ->set("intent", VIPS_INTENT_PERCEPTUAL));
       }
-
       // Override EXIF Orientation tag
       if (baton->withMetadata && baton->withMetadataOrientation != -1) {
         image = sharp::SetExifOrientation(image, baton->withMetadataOrientation);
       }
+      // Metadata key/value pairs, e.g. EXIF
+      if (!baton->withMetadataStrs.empty()) {
+        image = image.copy();
+        for (const auto& s : baton->withMetadataStrs) {
+          image.set(s.first.data(), s.second.data());
+        }
+      }
 
       // Number of channels used in output image
       baton->channels = image.bands();
@@ -1328,7 +1347,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->affineInterpolator = vips::VInterpolate::new_from_name(sharp::AttrAsStr(options, "affineInterpolator").data());
 
   baton->removeAlpha = sharp::AttrAsBool(options, "removeAlpha");
-  baton->ensureAlpha = sharp::AttrAsBool(options, "ensureAlpha");
+  baton->ensureAlpha = sharp::AttrAsDouble(options, "ensureAlpha");
   if (options.Has("boolean")) {
     baton->boolean = sharp::CreateInputDescriptor(options.Get("boolean").As<Napi::Object>());
     baton->booleanOp = sharp::GetBooleanOperation(sharp::AttrAsStr(options, "booleanOp"));
@@ -1366,6 +1385,12 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
   baton->withMetadata = sharp::AttrAsBool(options, "withMetadata");
   baton->withMetadataOrientation = sharp::AttrAsUint32(options, "withMetadataOrientation");
   baton->withMetadataIcc = sharp::AttrAsStr(options, "withMetadataIcc");
+  Napi::Object mdStrs = options.Get("withMetadataStrs").As<Napi::Object>();
+  Napi::Array mdStrKeys = mdStrs.GetPropertyNames();
+  for (unsigned int i = 0; i < mdStrKeys.Length(); i++) {
+    std::string k = sharp::AttrAsStr(mdStrKeys, i);
+    baton->withMetadataStrs.insert(std::make_pair(k, sharp::AttrAsStr(mdStrs, k)));
+  }
   // Format-specific
   baton->jpegQuality = sharp::AttrAsUint32(options, "jpegQuality");
   baton->jpegProgressive = sharp::AttrAsBool(options, "jpegProgressive");

src/pipeline.h

@@ -18,6 +18,7 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <unordered_map>
 
 #include <napi.h>
 #include <vips/vips8>
@@ -168,6 +169,7 @@ struct PipelineBaton {
   bool withMetadata;
   int withMetadataOrientation;
   std::string withMetadataIcc;
+  std::unordered_map<std::string, std::string> withMetadataStrs;
   std::unique_ptr<double[]> convKernel;
   int convKernelWidth;
   int convKernelHeight;
@@ -178,7 +180,7 @@ struct PipelineBaton {
   VipsOperationBoolean bandBoolOp;
   int extractChannel;
   bool removeAlpha;
-  bool ensureAlpha;
+  double ensureAlpha;
   VipsInterpretation colourspace;
   int pageHeight;
   std::vector<int> delay;
@@ -297,7 +299,7 @@ struct PipelineBaton {
     bandBoolOp(VIPS_OPERATION_BOOLEAN_LAST),
     extractChannel(-1),
     removeAlpha(false),
-    ensureAlpha(false),
+    ensureAlpha(-1.0),
     colourspace(VIPS_INTERPRETATION_LAST),
     pageHeight(0),
     delay{-1},

test/bench/package.json

@@ -13,7 +13,7 @@
     "gm": "1.23.1",
     "imagemagick": "0.1.3",
     "jimp": "0.16.1",
-    "mapnik": "4.5.5",
+    "mapnik": "4.5.6",
     "semver": "7.3.4"
   },
   "license": "Apache-2.0",

test/bench/perf.js

@@ -1,5 +1,6 @@
 'use strict';
 
+const os = require('os');
 const fs = require('fs');
 
 const async = require('async');
@@ -25,6 +26,9 @@ const height = 588;
 // Disable libvips cache to ensure tests are as fair as they can be
 sharp.cache(false);
 
+// Spawn one thread per CPU
+sharp.concurrency(os.cpus().length);
+
 async.series({
   jpeg: function (callback) {
     const inputJpgBuffer = fs.readFileSync(fixtures.inputJpg);

test/unit/alpha.js

@@ -155,4 +155,27 @@ describe('Alpha transparency', function () {
         });
     }));
   });
+
+  it('Valid ensureAlpha value used for alpha channel', async () => {
+    const background = { r: 255, g: 0, b: 0 };
+    const [r, g, b, alpha] = await sharp({
+      create: {
+        width: 8,
+        height: 8,
+        channels: 3,
+        background
+      }
+    })
+      .ensureAlpha(0.5)
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r, g, b, alpha }, { ...background, alpha: 127 });
+  });
+
+  it('Invalid ensureAlpha value throws', async () => {
+    assert.throws(() => {
+      sharp().ensureAlpha('fail');
+    });
+  });
 });

test/unit/colourspace.js

@@ -42,18 +42,15 @@ describe('Colour space conversion', function () {
       });
   });
 
-  if (sharp.format.tiff.input.file && sharp.format.webp.output.buffer) {
-    it('From 1-bit TIFF to sRGB WebP [slow]', function (done) {
-      sharp(fixtures.inputTiff)
-        .webp()
-        .toBuffer(function (err, data, info) {
-          if (err) throw err;
-          assert.strictEqual(true, data.length > 0);
-          assert.strictEqual('webp', info.format);
-          done();
-        });
-    });
-  }
+  it('From 1-bit TIFF to sRGB WebP', async () => {
+    const data = await sharp(fixtures.inputTiff)
+      .resize(8, 8)
+      .webp()
+      .toBuffer();
+
+    const { format } = await sharp(data).metadata();
+    assert.strictEqual(format, 'webp');
+  });
 
   it('From CMYK to sRGB', function (done) {
     sharp(fixtures.inputJpgWithCmykProfile)

test/unit/composite.js

@@ -225,6 +225,24 @@ describe('composite', () => {
       });
   });
 
+  it('centre gravity should replicate correct number of tiles', async () => {
+    const red = { r: 255, g: 0, b: 0 };
+    const [r, g, b] = await sharp({
+      create: {
+        width: 40, height: 40, channels: 4, background: red
+      }
+    })
+      .composite([{
+        input: fixtures.inputPngWithTransparency16bit,
+        gravity: 'centre',
+        tile: true
+      }])
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r, g, b }, red);
+  });
+
   it('cutout via dest-in', done => {
     sharp(fixtures.inputJpg)
       .resize(300, 300)
@@ -390,4 +408,20 @@ describe('composite', () => {
       }, /Expected valid gravity for gravity but received invalid of type string/);
     });
   });
+
+  it('Allow offset beyond bottom/right edge', async () => {
+    const red = { r: 255, g: 0, b: 0 };
+    const blue = { r: 0, g: 0, b: 255 };
+
+    const [r, g, b] = await sharp({ create: { width: 2, height: 2, channels: 4, background: red } })
+      .composite([{
+        input: { create: { width: 2, height: 2, channels: 4, background: blue } },
+        top: 1,
+        left: 1
+      }])
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual(red, { r, g, b });
+  });
 });

test/unit/extend.js

@@ -41,7 +41,6 @@ describe('Extend', function () {
       .resize(120)
       .extend({
         top: 50,
-        bottom: 0,
         left: 10,
         right: 35,
         background: { r: 0, g: 0, b: 0, alpha: 0 }
@@ -64,18 +63,38 @@ describe('Extend', function () {
       sharp().extend(-1);
     });
   });
-  it('partial object fails', function () {
-    assert.throws(function () {
-      sharp().extend({ top: 1 });
-    });
+  it('invalid top fails', () => {
+    assert.throws(
+      () => sharp().extend({ top: 'fail' }),
+      /Expected positive integer for top but received fail of type string/
+    );
+  });
+  it('invalid bottom fails', () => {
+    assert.throws(
+      () => sharp().extend({ bottom: -1 }),
+      /Expected positive integer for bottom but received -1 of type number/
+    );
+  });
+  it('invalid left fails', () => {
+    assert.throws(
+      () => sharp().extend({ left: 0.1 }),
+      /Expected positive integer for left but received 0.1 of type number/
+    );
+  });
+  it('invalid right fails', () => {
+    assert.throws(
+      () => sharp().extend({ right: {} }),
+      /Expected positive integer for right but received \[object Object\] of type object/
+    );
+  });
+  it('can set all edges apart from right', () => {
+    assert.doesNotThrow(() => sharp().extend({ top: 1, left: 2, bottom: 3 }));
   });
 
   it('should add alpha channel before extending with a transparent Background', function (done) {
     sharp(fixtures.inputJpgWithLandscapeExif1)
       .extend({
-        top: 0,
         bottom: 10,
-        left: 0,
         right: 10,
         background: { r: 0, g: 0, b: 0, alpha: 0 }
       })
@@ -91,9 +110,7 @@ describe('Extend', function () {
   it('PNG with 2 channels', function (done) {
     sharp(fixtures.inputPngWithGreyAlpha)
       .extend({
-        top: 0,
         bottom: 20,
-        left: 0,
         right: 20,
         background: 'transparent'
       })

test/unit/extract.js

@@ -28,32 +28,28 @@ describe('Partial image extraction', function () {
       });
   });
 
-  if (sharp.format.webp.output.file) {
-    it('WebP', function (done) {
-      sharp(fixtures.inputWebP)
-        .extract({ left: 100, top: 50, width: 125, height: 200 })
-        .toBuffer(function (err, data, info) {
-          if (err) throw err;
-          assert.strictEqual(125, info.width);
-          assert.strictEqual(200, info.height);
-          fixtures.assertSimilar(fixtures.expected('extract.webp'), data, done);
-        });
-    });
-  }
+  it('WebP', function (done) {
+    sharp(fixtures.inputWebP)
+      .extract({ left: 100, top: 50, width: 125, height: 200 })
+      .toBuffer(function (err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(125, info.width);
+        assert.strictEqual(200, info.height);
+        fixtures.assertSimilar(fixtures.expected('extract.webp'), data, done);
+      });
+  });
 
-  if (sharp.format.tiff.output.file) {
-    it('TIFF', function (done) {
-      sharp(fixtures.inputTiff)
-        .extract({ left: 34, top: 63, width: 341, height: 529 })
-        .jpeg()
-        .toBuffer(function (err, data, info) {
-          if (err) throw err;
-          assert.strictEqual(341, info.width);
-          assert.strictEqual(529, info.height);
-          fixtures.assertSimilar(fixtures.expected('extract.tiff'), data, done);
-        });
-    });
-  }
+  it('TIFF', function (done) {
+    sharp(fixtures.inputTiff)
+      .extract({ left: 34, top: 63, width: 341, height: 529 })
+      .jpeg()
+      .toBuffer(function (err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(341, info.width);
+        assert.strictEqual(529, info.height);
+        fixtures.assertSimilar(fixtures.expected('extract.tiff'), data, done);
+      });
+  });
 
   it('Before resize', function (done) {
     sharp(fixtures.inputJpg)

test/unit/io.js

@@ -718,6 +718,19 @@ describe('Input/output', function () {
         sharp({ level: -1 });
       }, /Expected integer between 0 and 256 for level but received -1 of type number/);
     });
+    it('Valid subifd property', function () {
+      sharp({ subifd: 1 });
+    });
+    it('Invalid subifd property (string) throws', function () {
+      assert.throws(function () {
+        sharp({ subifd: '1' });
+      }, /Expected integer between -1 and 100000 for subifd but received 1 of type string/);
+    });
+    it('Invalid subifd property (float) throws', function () {
+      assert.throws(function () {
+        sharp({ subifd: 1.2 });
+      }, /Expected integer between -1 and 100000 for subifd but received 1.2 of type number/);
+    });
   });
 
   describe('create new image', function () {

test/unit/libvips.js

@@ -125,7 +125,7 @@ describe('libvips binaries', function () {
 
     it('logs an error message', function (done) {
       console.error = function (msg) {
-        assert.strictEqual(msg, 'sharp: problem');
+        assert.strictEqual(msg, 'sharp: Installation error: problem');
         done();
       };
       libvips.log(new Error('problem'));

test/unit/metadata.js

@@ -599,6 +599,30 @@ describe('Image metadata', function () {
       });
   });
 
+  it('Add EXIF metadata to JPEG', async () => {
+    const data = await sharp({
+      create: {
+        width: 8,
+        height: 8,
+        channels: 3,
+        background: 'red'
+      }
+    })
+      .jpeg()
+      .withMetadata({
+        exif: {
+          IFD0: { Software: 'sharp' },
+          IFD2: { ExposureTime: '0.2' }
+        }
+      })
+      .toBuffer();
+
+    const { exif } = await sharp(data).metadata();
+    const parsedExif = exifReader(exif);
+    assert.strictEqual(parsedExif.image.Software, 'sharp');
+    assert.strictEqual(parsedExif.exif.ExposureTime, 0.2);
+  });
+
   it('chromaSubsampling 4:4:4:4 CMYK JPEG', function () {
     return sharp(fixtures.inputJpgWithCmykProfile)
       .metadata()
@@ -717,5 +741,20 @@ describe('Image metadata', function () {
         sharp().withMetadata({ icc: true });
       });
     });
+    it('Non object exif', function () {
+      assert.throws(function () {
+        sharp().withMetadata({ exif: false });
+      });
+    });
+    it('Non string value in object exif', function () {
+      assert.throws(function () {
+        sharp().withMetadata({ exif: { ifd0: false } });
+      });
+    });
+    it('Non string value in nested object exif', function () {
+      assert.throws(function () {
+        sharp().withMetadata({ exif: { ifd0: { fail: false } } });
+      });
+    });
   });
 });

test/unit/modulate.js

@@ -28,115 +28,138 @@ describe('Modulate', function () {
     });
   });
 
-  it('should be able to hue-rotate', function () {
-    const base = 'modulate-hue-120.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to hue-rotate', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ hue: 120 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 25);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 41, g: 107, b: 57 }, { r, g, b });
   });
 
-  it('should be able to brighten', function () {
-    const base = 'modulate-brightness-2.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to brighten', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ brightness: 2 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 25);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 255, g: 173, b: 168 }, { r, g, b });
   });
 
-  it('should be able to unbrighten', function () {
-    const base = 'modulate-brightness-0-5.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to darken', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ brightness: 0.5 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 25);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 97, g: 17, b: 25 }, { r, g, b });
   });
 
-  it('should be able to saturate', function () {
-    const base = 'modulate-saturation-2.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to saturate', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ saturation: 2 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 30);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 198, g: 0, b: 43 }, { r, g, b });
   });
 
-  it('should be able to desaturate', function () {
-    const base = 'modulate-saturation-0.5.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to desaturate', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ saturation: 0.5 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 25);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 127, g: 83, b: 81 }, { r, g, b });
   });
 
-  it('should be able to modulate all channels', function () {
-    const base = 'modulate-all.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    return sharp(fixtures.inputJpg)
+  it('should be able to modulate all channels', async () => {
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
       .modulate({ brightness: 2, saturation: 0.5, hue: 180 })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected, 25);
-      });
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 149, g: 209, b: 214 }, { r, g, b });
   });
 
-  describe('hue-rotate', function (done) {
-    [30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360].forEach(function (angle) {
-      it('should properly hue rotate by ' + angle + 'deg', function () {
-        const base = 'modulate-hue-angle-' + angle + '.png';
-        const actual = fixtures.path('output.' + base);
+  it('should be able to use linear and modulate together', async () => {
+    const contrast = 1.5;
+    const brightness = 0.5;
+
+    const [r, g, b] = await sharp({
+      create: {
+        width: 1,
+        height: 1,
+        channels: 3,
+        background: { r: 153, g: 68, b: 68 }
+      }
+    })
+      .linear(contrast, -(128 * contrast) + 128)
+      .modulate({ brightness })
+      .raw()
+      .toBuffer();
+
+    assert.deepStrictEqual({ r: 81, g: 0, b: 0 }, { r, g, b });
+  });
+
+  describe('hue-rotate', () => {
+    [30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360].forEach(angle => {
+      it(`should hue rotate by ${angle} deg`, async () => {
+        const base = `modulate-hue-angle-${angle}.png`;
+        const actual = fixtures.path(`output.${base}`);
         const expected = fixtures.expected(base);
 
-        return sharp(fixtures.testPattern)
+        await sharp(fixtures.testPattern)
+          .resize(320)
           .modulate({ hue: angle })
+          .png({ compressionLevel: 0 })
           .toFile(actual)
-          .then(function () {
-            fixtures.assertMaxColourDistance(actual, expected, 25);
+          .then(() => {
+            fixtures.assertMaxColourDistance(actual, expected);
           });
       });
     });
   });
-
-  it('should be able to use linear and modulate together', function () {
-    const base = 'modulate-linear.jpg';
-    const actual = fixtures.path('output.' + base);
-    const expected = fixtures.expected(base);
-
-    const contrast = 1.5;
-    const brightness = 0.5;
-
-    return sharp(fixtures.testPattern)
-      .linear(contrast, -(128 * contrast) + 128)
-      .modulate({ brightness })
-      .toFile(actual)
-      .then(function () {
-        fixtures.assertMaxColourDistance(actual, expected);
-      });
-  });
 });

test/unit/normalize.js

@@ -54,6 +54,7 @@ describe('Normalization', function () {
 
   it('keeps an existing alpha channel', function (done) {
     sharp(fixtures.inputPngWithTransparency)
+      .resize(8, 8)
       .normalize()
       .toBuffer(function (err, data) {
         if (err) throw err;
@@ -69,6 +70,7 @@ describe('Normalization', function () {
 
   it('keeps the alpha channel of greyscale images intact', function (done) {
     sharp(fixtures.inputPngWithGreyAlpha)
+      .resize(8, 8)
       .normalise()
       .toBuffer(function (err, data) {
         if (err) throw err;

test/unit/svg.js

@@ -1,5 +1,6 @@
 'use strict';
 
+const fs = require('fs');
 const assert = require('assert');
 
 const sharp = require('../../');
@@ -99,4 +100,18 @@ describe('SVG input', function () {
         fixtures.assertSimilar(fixtures.expected('svg-embedded.png'), data, done);
       });
   });
+
+  it('Converts SVG with truncated embedded PNG', async () => {
+    const truncatedPng = fs.readFileSync(fixtures.inputPngTruncated).toString('base64');
+    const svg = `<?xml version="1.0" encoding="UTF-8"?>
+      <svg width="294" height="240" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+        <image width="294" height="240" xlink:href="data:image/png;base64,${truncatedPng}"/>
+      </svg>`;
+
+    const { info } = await sharp(Buffer.from(svg)).toBuffer({ resolveWithObject: true });
+    assert.strictEqual(info.format, 'png');
+    assert.strictEqual(info.width, 294);
+    assert.strictEqual(info.height, 240);
+    assert.strictEqual(info.channels, 4);
+  });
 });

test/unit/tiff.js

@@ -90,9 +90,11 @@ describe('TIFF', function () {
 
   it('Increasing TIFF quality increases file size', () =>
     sharp(fixtures.inputJpgWithLandscapeExif1)
+      .resize(320, 240)
       .tiff({ quality: 40 })
       .toBuffer()
       .then(tiff40 => sharp(fixtures.inputJpgWithLandscapeExif1)
+        .resize(320, 240)
         .tiff({ quality: 90 })
         .toBuffer()
         .then(tiff90 =>
@@ -155,6 +157,7 @@ describe('TIFF', function () {
 
   it('TIFF setting xres and yres on file', () =>
     sharp(fixtures.inputTiff)
+      .resize(8, 8)
       .tiff({
         xres: 1000,
         yres: 1000
@@ -171,6 +174,7 @@ describe('TIFF', function () {
 
   it('TIFF setting xres and yres on buffer', () =>
     sharp(fixtures.inputTiff)
+      .resize(8, 8)
       .tiff({
         xres: 1000,
         yres: 1000

test/unit/toFormat.js

@@ -5,22 +5,23 @@ const sharp = require('../../');
 const fixtures = require('../fixtures');
 
 describe('toFormat', () => {
-  it('accepts upper case characters as format parameter (string)', function (done) {
-    sharp(fixtures.inputJpg)
+  it('accepts upper case characters as format parameter (string)', async () => {
+    const data = await sharp(fixtures.inputJpg)
+      .resize(8, 8)
       .toFormat('PNG')
-      .toBuffer(function (err, data, info) {
-        if (err) throw err;
-        assert.strictEqual('png', info.format);
-        done();
-      });
+      .toBuffer();
+
+    const { format } = await sharp(data).metadata();
+    assert.strictEqual(format, 'png');
   });
-  it('accepts upper case characters as format parameter (object)', function (done) {
-    sharp(fixtures.inputJpg)
+
+  it('accepts upper case characters as format parameter (object)', async () => {
+    const data = await sharp(fixtures.inputJpg)
+      .resize(8, 8)
       .toFormat({ id: 'PNG' })
-      .toBuffer(function (err, data, info) {
-        if (err) throw err;
-        assert.strictEqual('png', info.format);
-        done();
-      });
+      .toBuffer();
+
+    const { format } = await sharp(data).metadata();
+    assert.strictEqual(format, 'png');
   });
 });