From 58c2af3251b984e801a37d42a3f82fd80935bfb7 Mon Sep 17 00:00:00 2001 From: Lovell Fuller Date: Mon, 25 Apr 2022 11:41:06 +0100 Subject: [PATCH] Docs: improve output format info for toBuffer --- docs/api-output.md | 161 ++++++++++++++++++++++------------------- docs/search-index.json | 2 +- lib/output.js | 3 + 3 files changed, 89 insertions(+), 77 deletions(-) diff --git a/docs/api-output.md b/docs/api-output.md index ea16e053e..8d3c251d9 100644 --- a/docs/api-output.md +++ b/docs/api-output.md @@ -46,6 +46,8 @@ Returns **[Promise][5]<[Object][6]>** when no callback is provided Write output to a Buffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and raw pixel data output are supported. +Use [toFormat][7] or one of the format-specific functions such as [jpeg][8], [png][9] etc. to set the output format. + If no explicit format is set, the output format will match the input image, except SVG input which becomes PNG output. By default all metadata will be removed, which includes EXIF-based orientation. @@ -66,7 +68,7 @@ A `Promise` is returned when `callback` is not provided. * `options` **[Object][6]?** - * `options.resolveWithObject` **[boolean][7]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`. + * `options.resolveWithObject` **[boolean][10]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`. * `callback` **[Function][3]?** ### Examples @@ -85,6 +87,7 @@ sharp(input) ```javascript sharp(input) + .png() .toBuffer({ resolveWithObject: true }) .then(({ data, info }) => { ... }) .catch(err => { ... }); @@ -107,7 +110,7 @@ await sharp(pixelArray, { raw: { width, height, channels } }) .toFile('my-changed-image.jpg'); ``` -Returns **[Promise][5]<[Buffer][8]>** when no callback is provided +Returns **[Promise][5]<[Buffer][11]>** when no callback is provided ## withMetadata @@ -124,10 +127,10 @@ EXIF metadata is unsupported for TIFF output. * `options` **[Object][6]?** - * `options.orientation` **[number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag. + * `options.orientation` **[number][12]?** 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 `{}`) - * `options.density` **[number][9]?** Number of pixels per inch (DPI). + * `options.density` **[number][12]?** Number of pixels per inch (DPI). ### Examples @@ -192,19 +195,19 @@ Use these JPEG options for output image. * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`) - * `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `80`) + * `options.progressive` **[boolean][10]** use progressive (interlace) scan (optional, default `false`) * `options.chromaSubsampling` **[string][2]** set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' chroma subsampling (optional, default `'4:2:0'`) - * `options.optimiseCoding` **[boolean][7]** optimise Huffman coding tables (optional, default `true`) - * `options.optimizeCoding` **[boolean][7]** alternative spelling of optimiseCoding (optional, default `true`) - * `options.mozjpeg` **[boolean][7]** use mozjpeg defaults, equivalent to `{ trellisQuantisation: true, overshootDeringing: true, optimiseScans: true, quantisationTable: 3 }` (optional, default `false`) - * `options.trellisQuantisation` **[boolean][7]** apply trellis quantisation (optional, default `false`) - * `options.overshootDeringing` **[boolean][7]** apply overshoot deringing (optional, default `false`) - * `options.optimiseScans` **[boolean][7]** optimise progressive scans, forces progressive (optional, default `false`) - * `options.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans (optional, default `false`) - * `options.quantisationTable` **[number][9]** quantization table to use, integer 0-8 (optional, default `0`) - * `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable (optional, default `0`) - * `options.force` **[boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`) + * `options.optimiseCoding` **[boolean][10]** optimise Huffman coding tables (optional, default `true`) + * `options.optimizeCoding` **[boolean][10]** alternative spelling of optimiseCoding (optional, default `true`) + * `options.mozjpeg` **[boolean][10]** use mozjpeg defaults, equivalent to `{ trellisQuantisation: true, overshootDeringing: true, optimiseScans: true, quantisationTable: 3 }` (optional, default `false`) + * `options.trellisQuantisation` **[boolean][10]** apply trellis quantisation (optional, default `false`) + * `options.overshootDeringing` **[boolean][10]** apply overshoot deringing (optional, default `false`) + * `options.optimiseScans` **[boolean][10]** optimise progressive scans, forces progressive (optional, default `false`) + * `options.optimizeScans` **[boolean][10]** alternative spelling of optimiseScans (optional, default `false`) + * `options.quantisationTable` **[number][12]** quantization table to use, integer 0-8 (optional, default `0`) + * `options.quantizationTable` **[number][12]** alternative spelling of quantisationTable (optional, default `0`) + * `options.force` **[boolean][10]** force JPEG output, otherwise attempt to use input format (optional, default `true`) ### Examples @@ -241,16 +244,16 @@ Set `palette` to `true` for slower, indexed PNG output. * `options` **[Object][6]?** - * `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`) - * `options.compressionLevel` **[number][9]** zlib compression level, 0 (fastest, largest) to 9 (slowest, smallest) (optional, default `6`) - * `options.adaptiveFiltering` **[boolean][7]** use adaptive row filtering (optional, default `false`) - * `options.palette` **[boolean][7]** quantise to a palette-based image with alpha transparency support (optional, default `false`) - * `options.quality` **[number][9]** use the lowest number of colours needed to achieve given quality, sets `palette` to `true` (optional, default `100`) - * `options.effort` **[number][9]** CPU effort, between 1 (fastest) and 10 (slowest), sets `palette` to `true` (optional, default `7`) - * `options.colours` **[number][9]** maximum number of palette entries, sets `palette` to `true` (optional, default `256`) - * `options.colors` **[number][9]** alternative spelling of `options.colours`, sets `palette` to `true` (optional, default `256`) - * `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, sets `palette` to `true` (optional, default `1.0`) - * `options.force` **[boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`) + * `options.progressive` **[boolean][10]** use progressive (interlace) scan (optional, default `false`) + * `options.compressionLevel` **[number][12]** zlib compression level, 0 (fastest, largest) to 9 (slowest, smallest) (optional, default `6`) + * `options.adaptiveFiltering` **[boolean][10]** use adaptive row filtering (optional, default `false`) + * `options.palette` **[boolean][10]** quantise to a palette-based image with alpha transparency support (optional, default `false`) + * `options.quality` **[number][12]** use the lowest number of colours needed to achieve given quality, sets `palette` to `true` (optional, default `100`) + * `options.effort` **[number][12]** CPU effort, between 1 (fastest) and 10 (slowest), sets `palette` to `true` (optional, default `7`) + * `options.colours` **[number][12]** maximum number of palette entries, sets `palette` to `true` (optional, default `256`) + * `options.colors` **[number][12]** alternative spelling of `options.colours`, sets `palette` to `true` (optional, default `256`) + * `options.dither` **[number][12]** level of Floyd-Steinberg error diffusion, sets `palette` to `true` (optional, default `1.0`) + * `options.force` **[boolean][10]** force PNG output, otherwise attempt to use input format (optional, default `true`) ### Examples @@ -280,15 +283,15 @@ Use these WebP options for output image. * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`) - * `options.alphaQuality` **[number][9]** quality of alpha layer, integer 0-100 (optional, default `100`) - * `options.lossless` **[boolean][7]** use lossless compression mode (optional, default `false`) - * `options.nearLossless` **[boolean][7]** use near_lossless compression mode (optional, default `false`) - * `options.smartSubsample` **[boolean][7]** use high quality chroma subsampling (optional, default `false`) - * `options.effort` **[number][9]** CPU effort, between 0 (fastest) and 6 (slowest) (optional, default `4`) - * `options.loop` **[number][9]** number of animation iterations, use 0 for infinite animation (optional, default `0`) - * `options.delay` **([number][9] | [Array][10]<[number][9]>)?** delay(s) between animation frames (in milliseconds) - * `options.force` **[boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `80`) + * `options.alphaQuality` **[number][12]** quality of alpha layer, integer 0-100 (optional, default `100`) + * `options.lossless` **[boolean][10]** use lossless compression mode (optional, default `false`) + * `options.nearLossless` **[boolean][10]** use near_lossless compression mode (optional, default `false`) + * `options.smartSubsample` **[boolean][10]** use high quality chroma subsampling (optional, default `false`) + * `options.effort` **[number][12]** CPU effort, between 0 (fastest) and 6 (slowest) (optional, default `4`) + * `options.loop` **[number][12]** number of animation iterations, use 0 for infinite animation (optional, default `0`) + * `options.delay` **([number][12] | [Array][13]<[number][12]>)?** delay(s) between animation frames (in milliseconds) + * `options.force` **[boolean][10]** force WebP output, otherwise attempt to use input format (optional, default `true`) ### Examples @@ -320,13 +323,13 @@ The first entry in the palette is reserved for transparency. * `options` **[Object][6]?** output options - * `options.colours` **[number][9]** maximum number of palette entries, including transparency, between 2 and 256 (optional, default `256`) - * `options.colors` **[number][9]** alternative spelling of `options.colours` (optional, default `256`) - * `options.effort` **[number][9]** CPU effort, between 1 (fastest) and 10 (slowest) (optional, default `7`) - * `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, between 0 (least) and 1 (most) (optional, default `1.0`) - * `options.loop` **[number][9]** number of animation iterations, use 0 for infinite animation (optional, default `0`) - * `options.delay` **([number][9] | [Array][10]<[number][9]>)?** delay(s) between animation frames (in milliseconds) - * `options.force` **[boolean][7]** force GIF output, otherwise attempt to use input format (optional, default `true`) + * `options.colours` **[number][12]** maximum number of palette entries, including transparency, between 2 and 256 (optional, default `256`) + * `options.colors` **[number][12]** alternative spelling of `options.colours` (optional, default `256`) + * `options.effort` **[number][12]** CPU effort, between 1 (fastest) and 10 (slowest) (optional, default `7`) + * `options.dither` **[number][12]** level of Floyd-Steinberg error diffusion, between 0 (least) and 1 (most) (optional, default `1.0`) + * `options.loop` **[number][12]** number of animation iterations, use 0 for infinite animation (optional, default `0`) + * `options.delay` **([number][12] | [Array][13]<[number][12]>)?** delay(s) between animation frames (in milliseconds) + * `options.force` **[boolean][10]** force GIF output, otherwise attempt to use input format (optional, default `true`) ### Examples @@ -365,16 +368,16 @@ Use these JP2 options for output image. Requires libvips compiled with support for OpenJPEG. The prebuilt binaries do not include this - see -[installing a custom libvips][11]. +[installing a custom libvips][14]. ### Parameters * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`) - * `options.lossless` **[boolean][7]** use lossless compression mode (optional, default `false`) - * `options.tileWidth` **[number][9]** horizontal tile size (optional, default `512`) - * `options.tileHeight` **[number][9]** vertical tile size (optional, default `512`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `80`) + * `options.lossless` **[boolean][10]** use lossless compression mode (optional, default `false`) + * `options.tileWidth` **[number][12]** horizontal tile size (optional, default `512`) + * `options.tileHeight` **[number][12]** vertical tile size (optional, default `512`) * `options.chromaSubsampling` **[string][2]** set to '4:2:0' to use chroma subsampling (optional, default `'4:4:4'`) ### Examples @@ -414,18 +417,18 @@ The `density` can be set in pixels/inch via [withMetadata][1] instead of providi * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`) - * `options.force` **[boolean][7]** force TIFF output, otherwise attempt to use input format (optional, default `true`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `80`) + * `options.force` **[boolean][10]** force TIFF output, otherwise attempt to use input format (optional, default `true`) * `options.compression` **[string][2]** compression options: lzw, deflate, jpeg, ccittfax4 (optional, default `'jpeg'`) * `options.predictor` **[string][2]** compression predictor options: none, horizontal, float (optional, default `'horizontal'`) - * `options.pyramid` **[boolean][7]** write an image pyramid (optional, default `false`) - * `options.tile` **[boolean][7]** write a tiled tiff (optional, default `false`) - * `options.tileWidth` **[number][9]** horizontal tile size (optional, default `256`) - * `options.tileHeight` **[number][9]** vertical tile size (optional, default `256`) - * `options.xres` **[number][9]** horizontal resolution in pixels/mm (optional, default `1.0`) - * `options.yres` **[number][9]** vertical resolution in pixels/mm (optional, default `1.0`) + * `options.pyramid` **[boolean][10]** write an image pyramid (optional, default `false`) + * `options.tile` **[boolean][10]** write a tiled tiff (optional, default `false`) + * `options.tileWidth` **[number][12]** horizontal tile size (optional, default `256`) + * `options.tileHeight` **[number][12]** vertical tile size (optional, default `256`) + * `options.xres` **[number][12]** horizontal resolution in pixels/mm (optional, default `1.0`) + * `options.yres` **[number][12]** vertical resolution in pixels/mm (optional, default `1.0`) * `options.resolutionUnit` **[string][2]** resolution unit options: inch, cm (optional, default `'inch'`) - * `options.bitdepth` **[number][9]** reduce bitdepth to 1, 2 or 4 bit (optional, default `8`) + * `options.bitdepth` **[number][12]** reduce bitdepth to 1, 2 or 4 bit (optional, default `8`) ### Examples @@ -457,9 +460,9 @@ AVIF image sequences are not supported. * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `50`) - * `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`) - * `options.effort` **[number][9]** CPU effort, between 0 (fastest) and 9 (slowest) (optional, default `4`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `50`) + * `options.lossless` **[boolean][10]** use lossless compression (optional, default `false`) + * `options.effort` **[number][12]** CPU effort, between 0 (fastest) and 9 (slowest) (optional, default `4`) * `options.chromaSubsampling` **[string][2]** set to '4:2:0' to use chroma subsampling (optional, default `'4:4:4'`) @@ -483,10 +486,10 @@ globally-installed libvips compiled with support for libheif, libde265 and x265. * `options` **[Object][6]?** output options - * `options.quality` **[number][9]** quality, integer 1-100 (optional, default `50`) + * `options.quality` **[number][12]** quality, integer 1-100 (optional, default `50`) * `options.compression` **[string][2]** compression format: av1, hevc (optional, default `'av1'`) - * `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`) - * `options.effort` **[number][9]** CPU effort, between 0 (fastest) and 9 (slowest) (optional, default `4`) + * `options.lossless` **[boolean][10]** use lossless compression (optional, default `false`) + * `options.effort` **[number][12]** CPU effort, between 0 (fastest) and 9 (slowest) (optional, default `4`) * `options.chromaSubsampling` **[string][2]** set to '4:2:0' to use chroma subsampling (optional, default `'4:4:4'`) @@ -542,16 +545,16 @@ Use a `.zip` or `.szi` file extension with `toFile` to write to a compressed arc * `options` **[Object][6]?** - * `options.size` **[number][9]** tile size in pixels, a value between 1 and 8192. (optional, default `256`) - * `options.overlap` **[number][9]** tile overlap in pixels, a value between 0 and 8192. (optional, default `0`) - * `options.angle` **[number][9]** tile angle of rotation, must be a multiple of 90. (optional, default `0`) - * `options.background` **([string][2] | [Object][6])** background colour, parsed by the [color][12] module, defaults to white without transparency. (optional, default `{r:255,g:255,b:255,alpha:1}`) + * `options.size` **[number][12]** tile size in pixels, a value between 1 and 8192. (optional, default `256`) + * `options.overlap` **[number][12]** tile overlap in pixels, a value between 0 and 8192. (optional, default `0`) + * `options.angle` **[number][12]** tile angle of rotation, must be a multiple of 90. (optional, default `0`) + * `options.background` **([string][2] | [Object][6])** background colour, parsed by the [color][15] module, defaults to white without transparency. (optional, default `{r:255,g:255,b:255,alpha:1}`) * `options.depth` **[string][2]?** how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout. - * `options.skipBlanks` **[number][9]** threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images (optional, default `-1`) + * `options.skipBlanks` **[number][12]** threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images (optional, default `-1`) * `options.container` **[string][2]** tile container, with value `fs` (filesystem) or `zip` (compressed file). (optional, default `'fs'`) * `options.layout` **[string][2]** filesystem layout, possible values are `dz`, `iiif`, `iiif3`, `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.centre` **[boolean][10]** centre image in tile. (optional, default `false`) + * `options.center` **[boolean][10]** alternative spelling of centre. (optional, default `false`) * `options.id` **[string][2]** when `layout` is `iiif`/`iiif3`, sets the `@id`/`id` attribute of `info.json` (optional, default `'https://example.com/iiif'`) ### Examples @@ -584,7 +587,7 @@ Time spent waiting for a libuv thread to become available is not included. * `options` **[Object][6]** - * `options.seconds` **[number][9]** Number of seconds after which processing will be stopped + * `options.seconds` **[number][12]** Number of seconds after which processing will be stopped Returns **Sharp** @@ -604,14 +607,20 @@ Returns **Sharp** [6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object -[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean +[7]: #toformat + +[8]: #jpeg + +[9]: #png + +[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean -[8]: https://nodejs.org/api/buffer.html +[11]: https://nodejs.org/api/buffer.html -[9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number +[12]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number -[10]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array +[13]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array -[11]: https://sharp.pixelplumbing.com/install#custom-libvips +[14]: https://sharp.pixelplumbing.com/install#custom-libvips -[12]: https://www.npmjs.org/package/color +[15]: https://www.npmjs.org/package/color diff --git a/docs/search-index.json b/docs/search-index.json index 5c58c5675..5eab6efa7 100644 --- a/docs/search-index.json +++ b/docs/search-index.json @@ -1 +1 @@ -[{"t":"Prerequisites","d":"Node.js 12.13.0","k":"prerequisites node","l":"/install#prerequisites"},{"t":"Prebuilt binaries","d":"Ready-compiled sharp and libvips binaries are provided for use on the most common platforms macOS x64 10.13 macOS ARM64 Linux x64 glibc 2.17, musl 1.1.24, CPU with SSE4.2 Linux ARM64 glibc 2.17, musl","k":"prebuilt binaries compiled sharp libvips common platforms macos arm linux glibc musl cpu sse","l":"/install#prebuilt-binaries"},{"t":"Common problems","d":"The architecture and platform of Node.js used for npm install must be the same as the architecture and platform of Node.js used at runtime. See the cross-platform","k":"common problems architecture platform node npm install runtime cross","l":"/install#common-problems"},{"t":"Apple M1","d":"Prebuilt sharp and libvips binaries have been provided for macOS on ARM64 since sharp v0.29.0.","k":"apple prebuilt sharp libvips binaries macos arm","l":"/install#apple-m1"},{"t":"Custom libvips","d":"To use a custom, globally-installed version of libvips instead of the provided binaries, make sure it is at least the version listed under config.libvips in the package.json file and that it can be lo","k":"custom libvips globally installed version instead binaries listed config package json file","l":"/install#custom-libvips"},{"t":"Building from source","d":"This module will be compiled from source at npm install time when a globally-installed libvips is detected set the SHARP_IGNORE_GLOBAL_LIBVIPS environment variable to skip this, prebuilt sharp binarie","k":"building source module compiled npm install time globally installed libvips detected environment variable skip prebuilt sharp binarie","l":"/install#building-from-source"},{"t":"Custom prebuilt binaries","d":"This is an advanced approach that most people will not require. To install the prebuilt sharp binaries from a custom URL, set the sharp_binary_host npm config option or the npm_config_sharp_binary_hos","k":"custom prebuilt binaries advanced approach people require install sharp url npm config option","l":"/install#custom-prebuilt-binaries"},{"t":"Chinese mirror","d":"A mirror site based in China, provided by Alibaba, contains binaries for both sharp and libvips. To use this either set the following configuration sh npm config set sharp_binary_host https//npmmirror","k":"chinese mirror china alibaba binaries sharp libvips configuration npm config https npmmirror","l":"/install#chinese-mirror"},{"t":"FreeBSD","d":"The vips package must be installed before npm install is run. sh pkg install -y pkgconf vips sh cd /usr/ports/graphics/vips/ make install clean","k":"freebsd vips package installed npm install run pkg pkgconf usr ports graphics clean","l":"/install#freebsd"},{"t":"Linux memory allocator","d":"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 rea","k":"linux memory allocator glibc systems debian red hat long running multi threaded processes small allocations rea","l":"/install#linux-memory-allocator"},{"t":"Heroku","d":"Add the jemalloc buildpack to reduce the effects of memory fragmentation. Set NODE_MODULES_CACHE","k":"heroku add jemalloc buildpack reduce effects memory fragmentation","l":"/install#heroku"},{"t":"AWS Lambda","d":"The node_modules directory of the deployment package must include binaries for the Linux x64 platform. When building your deployment package on machines other than Linux x64 glibc, run the following a","k":"aws lambda nodemodules directory deployment package binaries linux platform building your machines glibc run","l":"/install#aws-lambda"},{"t":"webpack","d":"Ensure sharp is excluded from bundling via the externals configuration. js externals sharp commonjs sharp","k":"webpack sharp excluded bundling via externals configuration commonjs","l":"/install#webpack"},{"t":"esbuild","d":"Ensure sharp is excluded from bundling via the external","k":"esbuild sharp excluded bundling via external","l":"/install#esbuild"},{"t":"Worker threads","d":"On some platforms, including glibc-based Linux, the main thread must call requiresharp _before_ worker threads are created. This is to ensure shared libraries remain loaded in memory until after all t","k":"worker threads platforms glibc linux main thread shared libraries remain loaded memory","l":"/install#worker-threads"},{"t":"Canvas and Windows","d":"The prebuilt binaries provided by canvas for Windows depend on the unmaintained GTK 2, last updated in 2011. These conflict with the modern, up-to-date binaries provided by sharp. If both modules are","k":"canvas windows prebuilt binaries depend gtk updated conflict modern sharp modules","l":"/install#canvas-and-windows"},{"t":"Sharp","d":"Constructor factory to create an instance of sharp, to which further methods are chained.","k":"sharp constructor factory create instance further methods chained","l":"/api-constructor#sharp"},{"t":"clone","d":"Take a snapshot of the Sharp instance, returning a new instance. Cloned instances inherit the input of their parent instance. This allows multiple output Streams and therefore multiple processing pipe","k":"clone snapshot sharp instance returning new cloned instances inherit input parent multiple output streams processing pipe","l":"/api-constructor#clone"},{"t":"metadata","d":"Fast access to uncached image metadata without decoding any compressed pixel data.","k":"metadata fast access uncached decoding compressed pixel data","l":"/api-input#metadata"},{"t":"stats","d":"Access to pixel-derived image statistics for every channel in the image. A Promise is returned when callback is not provided.","k":"stats access pixel derived statistics channel promise","l":"/api-input#stats"},{"t":"toFile","d":"Write output image data to a file.","k":"tofile write output data file","l":"/api-output#tofile"},{"t":"toBuffer","d":"Write output to a Buffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and raw pixel data output are supported.","k":"tobuffer write output buffer jpeg png webp avif tiff gif raw pixel data","l":"/api-output#tobuffer"},{"t":"withMetadata","d":"Include all metadata EXIF, XMP, IPTC from the input image in the output image. This will also convert to and add a web-friendly sRGB ICC profile unless a custom output profile is provided.","k":"withmetadata metadata exif xmp iptc input output convert add web friendly srgb icc profile custom","l":"/api-output#withmetadata"},{"t":"toFormat","d":"Force output to a given format.","k":"toformat force output format","l":"/api-output#toformat"},{"t":"jpeg","d":"Use these JPEG options for output image.","k":"jpeg output quality progressive optimisecoding optimizecoding mozjpeg optimisescans optimizescans force","l":"/api-output#jpeg"},{"t":"png","d":"Use these PNG options for output image.","k":"png output","l":"/api-output#png"},{"t":"webp","d":"Use these WebP options for output image.","k":"webp output quality alphaquality lossless nearlossless smartsubsample effort loop delay force","l":"/api-output#webp"},{"t":"gif","d":"Use these GIF options for the output image.","k":"gif output","l":"/api-output#gif"},{"t":"tiff","d":"Use these TIFF options for output image.","k":"tiff output","l":"/api-output#tiff"},{"t":"avif","d":"Use these AVIF options for output image.","k":"avif output","l":"/api-output#avif"},{"t":"heif","d":"Use these HEIF options for output image.","k":"heif output","l":"/api-output#heif"},{"t":"raw","d":"Force output to be raw, uncompressed pixel data. Pixel ordering is left-to-right, top-to-bottom, without padding. Channel ordering will be RGB or RGBA for non-greyscale colourspaces.","k":"raw force output uncompressed pixel data ordering left right top bottom padding channel rgb rgba greyscale colourspaces depth size overlap angle background skipblanks container layout centre center","l":"/api-output#raw"},{"t":"timeout","d":"Set a timeout for processing, in seconds. Use a value of zero to continue processing indefinitely, the default behaviour.","k":"timeout processing seconds zero continue indefinitely behaviour","l":"/api-output#timeout"},{"t":"resize","d":"Resize image to width, height or width x height.","k":"resize width height","l":"/api-resize#resize"},{"t":"extend","d":"Extends/pads the edges of the image with the provided background colour. This operation will always occur after resizing and extraction, if any.","k":"extend extends pads edges background colour operation resizing extraction","l":"/api-resize#extend"},{"t":"extract","d":"Extract/crop a region of the image.","k":"extract crop region","l":"/api-resize#extract"},{"t":"trim","d":"Trim boring pixels from all edges that contain values similar to the top-left pixel. Images consisting entirely of a single colour will calculate boring using the alpha channel, if any.","k":"trim boring pixels edges contain similar top left pixel images consisting single colour calculate alpha channel","l":"/api-resize#trim"},{"t":"composite","d":"Composite images over the processed resized, extracted etc. image.","k":"composite images processed resized extracted","l":"/api-composite#composite"},{"t":"rotate","d":"Rotate the output image by either an explicit angle or auto-orient based on the EXIF Orientation tag.","k":"rotate output explicit angle auto orient exif orientation tag","l":"/api-operation#rotate"},{"t":"flip","d":"Flip the image about the vertical Y axis. This always occurs after rotation, if any. The use of flip implies the removal of the EXIF Orientation tag, if any.","k":"flip vertical axis rotation removal exif orientation tag","l":"/api-operation#flip"},{"t":"flop","d":"Flop the image about the horizontal X axis. This always occurs after rotation, if any. The use of flop implies the removal of the EXIF Orientation tag, if any.","k":"flop horizontal axis rotation removal exif orientation tag","l":"/api-operation#flop"},{"t":"affine","d":"Perform an affine transform on an image. This operation will always occur after resizing, extraction and rotation, if any.","k":"affine transform operation resizing extraction rotation","l":"/api-operation#affine"},{"t":"sharpen","d":"Sharpen the image. When used without parameters, performs a fast, mild sharpen of the output image. When a sigma is provided, performs a slower, more accurate sharpen of the L channel in the LAB colou","k":"sharpen parameters fast mild output sigma slower accurate channel lab colou","l":"/api-operation#sharpen"},{"t":"median","d":"Apply median filter. When used without parameters the default window is 3x3.","k":"median apply filter parameters window","l":"/api-operation#median"},{"t":"blur","d":"Blur the image.","k":"blur","l":"/api-operation#blur"},{"t":"flatten","d":"Merge alpha transparency channel, if any, with a background, then remove the alpha channel.","k":"flatten merge alpha transparency channel background remove","l":"/api-operation#flatten"},{"t":"gamma","d":"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. This can improve the perceived bright","k":"gamma apply correction reducing encoding darken pre resize factor increasing brighten post improve perceived bright","l":"/api-operation#gamma"},{"t":"negate","d":"Produce the negative of the image.","k":"negate negative alpha","l":"/api-operation#negate"},{"t":"normalise","d":"Enhance output image contrast by stretching its luminance to cover the full dynamic range.","k":"normalise enhance output contrast stretching luminance cover full dynamic range","l":"/api-operation#normalise"},{"t":"normalize","d":"Alternative spelling of normalise.","k":"normalize normalise","l":"/api-operation#normalize"},{"t":"clahe","d":"Perform contrast limiting adaptive histogram equalization CLAHE10.","k":"clahe contrast limiting adaptive histogram equalization","l":"/api-operation#clahe"},{"t":"convolve","d":"Convolve the image with the specified kernel.","k":"convolve kernel","l":"/api-operation#convolve"},{"t":"threshold","d":"Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.","k":"threshold pixel greater equal otherwise greyscale grayscale","l":"/api-operation#threshold"},{"t":"boolean","d":"Perform a bitwise boolean operation with operand image.","k":"boolean bitwise operation operand","l":"/api-operation#boolean"},{"t":"linear","d":"Apply the linear formula a input b to the image levels adjustment","k":"linear apply formula input levels adjustment","l":"/api-operation#linear"},{"t":"recomb","d":"Recomb the image with the specified matrix.","k":"recomb matrix","l":"/api-operation#recomb"},{"t":"modulate","d":"Transforms the image using brightness, saturation, hue rotation, and lightness. Brightness and lightness both operate on luminance, with the difference being that brightness is multiplicative whereas","k":"modulate transforms brightness saturation hue rotation lightness operate luminance difference being multiplicative whereas","l":"/api-operation#modulate"},{"t":"removeAlpha","d":"Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.","k":"removealpha remove alpha channel","l":"/api-channel#removealpha"},{"t":"ensureAlpha","d":"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 al","k":"ensurealpha output alpha transparency channel missing added level defaulting fully opaque","l":"/api-channel#ensurealpha"},{"t":"extractChannel","d":"Extract a single channel from a multi-channel image.","k":"extractchannel extract single channel multi","l":"/api-channel#extractchannel"},{"t":"joinChannel","d":"Join one or more channels to the image. The meaning of the added channels depends on the output colourspace, set with toColourspace. By default the output image will be web-friendly sRGB, with additio","k":"joinchannel join one channels meaning added depends output colourspace tocolourspace web friendly srgb additio","l":"/api-channel#joinchannel"},{"t":"bandbool","d":"Perform a bitwise boolean operation on all input image channels bands to produce a single channel output image.","k":"bandbool bitwise boolean operation input channels bands single channel output","l":"/api-channel#bandbool"},{"t":"tint","d":"Tint the image using the provided chroma while preserving the image luminance. An alpha channel may be present and will be unchanged by the operation.","k":"tint chroma preserving luminance alpha channel present unchanged operation","l":"/api-colour#tint"},{"t":"greyscale","d":"Convert to 8-bit greyscale 256 shades of grey. This is a linear operation. If the input image is in a non-linear colour space such as sRGB, use gamma with greyscale for the best results. By default th","k":"greyscale convert bit shades grey linear operation input colour space srgb gamma best results","l":"/api-colour#greyscale"},{"t":"grayscale","d":"Alternative spelling of greyscale.","k":"grayscale greyscale","l":"/api-colour#grayscale"},{"t":"pipelineColourspace","d":"Set the pipeline colourspace.","k":"pipeline colourspace","l":"/api-colour#pipelinecolourspace"},{"t":"pipelineColorspace","d":"Alternative spelling of pipelineColourspace.","k":"","l":"/api-colour#pipelinecolorspace"},{"t":"toColourspace","d":"Set the output colourspace. By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.","k":"tocolourspace output colourspace web friendly srgb additional channels interpreted alpha","l":"/api-colour#tocolourspace"},{"t":"toColorspace","d":"Alternative spelling of toColourspace.","k":"tocolorspace tocolourspace","l":"/api-colour#tocolorspace"},{"t":"format","d":"An Object containing nested boolean values representing the available input and output formats/methods.","k":"format object nested boolean representing available input output formats methods","l":"/api-utility#format"},{"t":"interpolators","d":"An Object containing the available interpolators and their proper values","k":"interpolators object available proper","l":"/api-utility#interpolators"},{"t":"versions","d":"An Object containing the version numbers of libvips and its dependencies.","k":"versions object version numbers libvips dependencies","l":"/api-utility#versions"},{"t":"vendor","d":"An Object containing the platform and architecture of the current and installed vendored binaries.","k":"vendor object platform architecture installed vendored binaries","l":"/api-utility#vendor"},{"t":"cache","d":"Gets or, when options are provided, sets the limits of libvips operation cache. Existing entries in the cache will be trimmed after any change in limits. This method always returns cache statistics, u","k":"cache limits libvips operation existing entries trimmed change method returns statistics memory files items","l":"/api-utility#cache"},{"t":"concurrency","d":"Gets or, when a concurrency is provided, sets the number of threads libvips should create to process each image.","k":"concurrency number threads libvips create process","l":"/api-utility#concurrency"},{"t":"queue","d":"An EventEmitter that emits a change event when a task is either","k":"queue eventemitter emits change event","l":"/api-utility#queue"},{"t":"counters","d":"Provides access to internal task counters.","k":"counters provides access internal","l":"/api-utility#counters"},{"t":"simd","d":"Get and set use of SIMD vector unit instructions. Requires libvips to have been compiled with liborc support.","k":"simd vector unit instructions libvips compiled liborc","l":"/api-utility#simd"}] \ No newline at end of file +[{"t":"Prerequisites","d":"Node.js 12.13.0","k":"prerequisites node","l":"/install#prerequisites"},{"t":"Prebuilt binaries","d":"Ready-compiled sharp and libvips binaries are provided for use on the most common platforms macOS x64 10.13 macOS ARM64 Linux x64 glibc 2.17, musl 1.1.24, CPU with SSE4.2 Linux ARM64 glibc 2.17, musl","k":"prebuilt binaries compiled sharp libvips common platforms macos arm linux glibc musl cpu sse","l":"/install#prebuilt-binaries"},{"t":"Common problems","d":"The architecture and platform of Node.js used for npm install must be the same as the architecture and platform of Node.js used at runtime. See the cross-platform","k":"common problems architecture platform node npm install runtime cross","l":"/install#common-problems"},{"t":"Apple M1","d":"Prebuilt sharp and libvips binaries have been provided for macOS on ARM64 since sharp v0.29.0.","k":"apple prebuilt sharp libvips binaries macos arm","l":"/install#apple-m1"},{"t":"Custom libvips","d":"To use a custom, globally-installed version of libvips instead of the provided binaries, make sure it is at least the version listed under config.libvips in the package.json file and that it can be lo","k":"custom libvips globally installed version instead binaries listed config package json file","l":"/install#custom-libvips"},{"t":"Building from source","d":"This module will be compiled from source at npm install time when a globally-installed libvips is detected set the SHARP_IGNORE_GLOBAL_LIBVIPS environment variable to skip this, prebuilt sharp binarie","k":"building source module compiled npm install time globally installed libvips detected environment variable skip prebuilt sharp binarie","l":"/install#building-from-source"},{"t":"Custom prebuilt binaries","d":"This is an advanced approach that most people will not require.","k":"custom prebuilt binaries advanced approach people require","l":"/install#custom-prebuilt-binaries"},{"t":"Prebuilt sharp binaries","d":"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 f","k":"prebuilt sharp binaries install custom url npm config option environment variable","l":"/install#prebuilt-sharp-binaries"},{"t":"Prebuilt libvips binaries","d":"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. To install the prebuil","k":"prebuilt libvips binaries install custom url npm config option environment variable prebuil","l":"/install#prebuilt-libvips-binaries"},{"t":"Chinese mirror","d":"A mirror site based in China, provided by Alibaba, contains binaries for both sharp and libvips. To use this either set the following configuration sh npm config set sharp_binary_host https//npmmirror","k":"chinese mirror china alibaba binaries sharp libvips configuration npm config https npmmirror","l":"/install#chinese-mirror"},{"t":"FreeBSD","d":"The vips package must be installed before npm install is run. sh pkg install -y pkgconf vips sh cd /usr/ports/graphics/vips/ make install clean","k":"freebsd vips package installed npm install run pkg pkgconf usr ports graphics clean","l":"/install#freebsd"},{"t":"Linux memory allocator","d":"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 rea","k":"linux memory allocator glibc systems debian red hat long running multi threaded processes small allocations rea","l":"/install#linux-memory-allocator"},{"t":"Heroku","d":"Add the jemalloc buildpack to reduce the effects of memory fragmentation. Set NODE_MODULES_CACHE","k":"heroku add jemalloc buildpack reduce effects memory fragmentation","l":"/install#heroku"},{"t":"AWS Lambda","d":"The node_modules directory of the deployment package must include binaries for the Linux x64 platform. When building your deployment package on machines other than Linux x64 glibc, run the following a","k":"aws lambda nodemodules directory deployment package binaries linux platform building your machines glibc run","l":"/install#aws-lambda"},{"t":"webpack","d":"Ensure sharp is excluded from bundling via the externals configuration. js externals sharp commonjs sharp","k":"webpack sharp excluded bundling via externals configuration commonjs","l":"/install#webpack"},{"t":"esbuild","d":"Ensure sharp is excluded from bundling via the external","k":"esbuild sharp excluded bundling via external","l":"/install#esbuild"},{"t":"Worker threads","d":"On some platforms, including glibc-based Linux, the main thread must call requiresharp _before_ worker threads are created. This is to ensure shared libraries remain loaded in memory until after all t","k":"worker threads platforms glibc linux main thread shared libraries remain loaded memory","l":"/install#worker-threads"},{"t":"Canvas and Windows","d":"The prebuilt binaries provided by canvas for Windows depend on the unmaintained GTK 2, last updated in 2011. These conflict with the modern, up-to-date binaries provided by sharp. If both modules are","k":"canvas windows prebuilt binaries depend gtk updated conflict modern sharp modules","l":"/install#canvas-and-windows"},{"t":"Sharp","d":"Constructor factory to create an instance of sharp, to which further methods are chained.","k":"sharp constructor factory create instance further methods chained","l":"/api-constructor#sharp"},{"t":"clone","d":"Take a snapshot of the Sharp instance, returning a new instance. Cloned instances inherit the input of their parent instance. This allows multiple output Streams and therefore multiple processing pipe","k":"clone snapshot sharp instance returning new cloned instances inherit input parent multiple output streams processing pipe","l":"/api-constructor#clone"},{"t":"metadata","d":"Fast access to uncached image metadata without decoding any compressed pixel data.","k":"metadata fast access uncached decoding compressed pixel data","l":"/api-input#metadata"},{"t":"stats","d":"Access to pixel-derived image statistics for every channel in the image. A Promise is returned when callback is not provided.","k":"stats access pixel derived statistics channel promise","l":"/api-input#stats"},{"t":"toFile","d":"Write output image data to a file.","k":"tofile write output data file","l":"/api-output#tofile"},{"t":"toBuffer","d":"Write output to a Buffer. JPEG, PNG, WebP, AVIF, TIFF, GIF and raw pixel data output are supported.","k":"tobuffer write output buffer jpeg png webp avif tiff gif raw pixel data","l":"/api-output#tobuffer"},{"t":"withMetadata","d":"Include all metadata EXIF, XMP, IPTC from the input image in the output image. This will also convert to and add a web-friendly sRGB ICC profile unless a custom output profile is provided.","k":"withmetadata metadata exif xmp iptc input output convert add web friendly srgb icc profile custom","l":"/api-output#withmetadata"},{"t":"toFormat","d":"Force output to a given format.","k":"toformat force output format","l":"/api-output#toformat"},{"t":"jpeg","d":"Use these JPEG options for output image.","k":"jpeg output quality progressive optimisecoding optimizecoding mozjpeg optimisescans optimizescans force","l":"/api-output#jpeg"},{"t":"png","d":"Use these PNG options for output image.","k":"png output","l":"/api-output#png"},{"t":"webp","d":"Use these WebP options for output image.","k":"webp output quality alphaquality lossless nearlossless smartsubsample effort loop delay force","l":"/api-output#webp"},{"t":"gif","d":"Use these GIF options for the output image.","k":"gif output","l":"/api-output#gif"},{"t":"tiff","d":"Use these TIFF options for output image.","k":"tiff output","l":"/api-output#tiff"},{"t":"avif","d":"Use these AVIF options for output image.","k":"avif output","l":"/api-output#avif"},{"t":"heif","d":"Use these HEIF options for output image.","k":"heif output","l":"/api-output#heif"},{"t":"raw","d":"Force output to be raw, uncompressed pixel data. Pixel ordering is left-to-right, top-to-bottom, without padding. Channel ordering will be RGB or RGBA for non-greyscale colourspaces.","k":"raw force output uncompressed pixel data ordering left right top bottom padding channel rgb rgba greyscale colourspaces depth size overlap angle background skipblanks container layout centre center","l":"/api-output#raw"},{"t":"timeout","d":"Set a timeout for processing, in seconds. Use a value of zero to continue processing indefinitely, the default behaviour.","k":"timeout processing seconds zero continue indefinitely behaviour","l":"/api-output#timeout"},{"t":"resize","d":"Resize image to width, height or width x height.","k":"resize width height","l":"/api-resize#resize"},{"t":"extend","d":"Extends/pads the edges of the image with the provided background colour. This operation will always occur after resizing and extraction, if any.","k":"extend extends pads edges background colour operation resizing extraction","l":"/api-resize#extend"},{"t":"extract","d":"Extract/crop a region of the image.","k":"extract crop region","l":"/api-resize#extract"},{"t":"trim","d":"Trim boring pixels from all edges that contain values similar to the top-left pixel. Images consisting entirely of a single colour will calculate boring using the alpha channel, if any.","k":"trim boring pixels edges contain similar top left pixel images consisting single colour calculate alpha channel","l":"/api-resize#trim"},{"t":"composite","d":"Composite images over the processed resized, extracted etc. image.","k":"composite images processed resized extracted","l":"/api-composite#composite"},{"t":"rotate","d":"Rotate the output image by either an explicit angle or auto-orient based on the EXIF Orientation tag.","k":"rotate output explicit angle auto orient exif orientation tag","l":"/api-operation#rotate"},{"t":"flip","d":"Flip the image about the vertical Y axis. This always occurs after rotation, if any. The use of flip implies the removal of the EXIF Orientation tag, if any.","k":"flip vertical axis rotation removal exif orientation tag","l":"/api-operation#flip"},{"t":"flop","d":"Flop the image about the horizontal X axis. This always occurs after rotation, if any. The use of flop implies the removal of the EXIF Orientation tag, if any.","k":"flop horizontal axis rotation removal exif orientation tag","l":"/api-operation#flop"},{"t":"affine","d":"Perform an affine transform on an image. This operation will always occur after resizing, extraction and rotation, if any.","k":"affine transform operation resizing extraction rotation","l":"/api-operation#affine"},{"t":"sharpen","d":"Sharpen the image. When used without parameters, performs a fast, mild sharpen of the output image. When a sigma is provided, performs a slower, more accurate sharpen of the L channel in the LAB colou","k":"sharpen parameters fast mild output sigma slower accurate channel lab colou","l":"/api-operation#sharpen"},{"t":"median","d":"Apply median filter. When used without parameters the default window is 3x3.","k":"median apply filter parameters window","l":"/api-operation#median"},{"t":"blur","d":"Blur the image.","k":"blur","l":"/api-operation#blur"},{"t":"flatten","d":"Merge alpha transparency channel, if any, with a background, then remove the alpha channel.","k":"flatten merge alpha transparency channel background remove","l":"/api-operation#flatten"},{"t":"gamma","d":"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. This can improve the perceived bright","k":"gamma apply correction reducing encoding darken pre resize factor increasing brighten post improve perceived bright","l":"/api-operation#gamma"},{"t":"negate","d":"Produce the negative of the image.","k":"negate negative alpha","l":"/api-operation#negate"},{"t":"normalise","d":"Enhance output image contrast by stretching its luminance to cover the full dynamic range.","k":"normalise enhance output contrast stretching luminance cover full dynamic range","l":"/api-operation#normalise"},{"t":"normalize","d":"Alternative spelling of normalise.","k":"normalize normalise","l":"/api-operation#normalize"},{"t":"clahe","d":"Perform contrast limiting adaptive histogram equalization CLAHE10.","k":"clahe contrast limiting adaptive histogram equalization","l":"/api-operation#clahe"},{"t":"convolve","d":"Convolve the image with the specified kernel.","k":"convolve kernel","l":"/api-operation#convolve"},{"t":"threshold","d":"Any pixel value greater than or equal to the threshold value will be set to 255, otherwise it will be set to 0.","k":"threshold pixel greater equal otherwise greyscale grayscale","l":"/api-operation#threshold"},{"t":"boolean","d":"Perform a bitwise boolean operation with operand image.","k":"boolean bitwise operation operand","l":"/api-operation#boolean"},{"t":"linear","d":"Apply the linear formula a input b to the image levels adjustment","k":"linear apply formula input levels adjustment","l":"/api-operation#linear"},{"t":"recomb","d":"Recomb the image with the specified matrix.","k":"recomb matrix","l":"/api-operation#recomb"},{"t":"modulate","d":"Transforms the image using brightness, saturation, hue rotation, and lightness. Brightness and lightness both operate on luminance, with the difference being that brightness is multiplicative whereas","k":"modulate transforms brightness saturation hue rotation lightness operate luminance difference being multiplicative whereas","l":"/api-operation#modulate"},{"t":"removeAlpha","d":"Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.","k":"removealpha remove alpha channel","l":"/api-channel#removealpha"},{"t":"ensureAlpha","d":"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 al","k":"ensurealpha output alpha transparency channel missing added level defaulting fully opaque","l":"/api-channel#ensurealpha"},{"t":"extractChannel","d":"Extract a single channel from a multi-channel image.","k":"extractchannel extract single channel multi","l":"/api-channel#extractchannel"},{"t":"joinChannel","d":"Join one or more channels to the image. The meaning of the added channels depends on the output colourspace, set with toColourspace. By default the output image will be web-friendly sRGB, with additio","k":"joinchannel join one channels meaning added depends output colourspace tocolourspace web friendly srgb additio","l":"/api-channel#joinchannel"},{"t":"bandbool","d":"Perform a bitwise boolean operation on all input image channels bands to produce a single channel output image.","k":"bandbool bitwise boolean operation input channels bands single channel output","l":"/api-channel#bandbool"},{"t":"tint","d":"Tint the image using the provided chroma while preserving the image luminance. An alpha channel may be present and will be unchanged by the operation.","k":"tint chroma preserving luminance alpha channel present unchanged operation","l":"/api-colour#tint"},{"t":"greyscale","d":"Convert to 8-bit greyscale 256 shades of grey. This is a linear operation. If the input image is in a non-linear colour space such as sRGB, use gamma with greyscale for the best results. By default th","k":"greyscale convert bit shades grey linear operation input colour space srgb gamma best results","l":"/api-colour#greyscale"},{"t":"grayscale","d":"Alternative spelling of greyscale.","k":"grayscale greyscale","l":"/api-colour#grayscale"},{"t":"pipelineColourspace","d":"Set the pipeline colourspace.","k":"pipeline colourspace","l":"/api-colour#pipelinecolourspace"},{"t":"pipelineColorspace","d":"Alternative spelling of pipelineColourspace.","k":"","l":"/api-colour#pipelinecolorspace"},{"t":"toColourspace","d":"Set the output colourspace. By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.","k":"tocolourspace output colourspace web friendly srgb additional channels interpreted alpha","l":"/api-colour#tocolourspace"},{"t":"toColorspace","d":"Alternative spelling of toColourspace.","k":"tocolorspace tocolourspace","l":"/api-colour#tocolorspace"},{"t":"format","d":"An Object containing nested boolean values representing the available input and output formats/methods.","k":"format object nested boolean representing available input output formats methods","l":"/api-utility#format"},{"t":"interpolators","d":"An Object containing the available interpolators and their proper values","k":"interpolators object available proper","l":"/api-utility#interpolators"},{"t":"versions","d":"An Object containing the version numbers of libvips and its dependencies.","k":"versions object version numbers libvips dependencies","l":"/api-utility#versions"},{"t":"vendor","d":"An Object containing the platform and architecture of the current and installed vendored binaries.","k":"vendor object platform architecture installed vendored binaries","l":"/api-utility#vendor"},{"t":"cache","d":"Gets or, when options are provided, sets the limits of libvips operation cache. Existing entries in the cache will be trimmed after any change in limits. This method always returns cache statistics, u","k":"cache limits libvips operation existing entries trimmed change method returns statistics memory files items","l":"/api-utility#cache"},{"t":"concurrency","d":"Gets or, when a concurrency is provided, sets the number of threads libvips should create to process each image.","k":"concurrency number threads libvips create process","l":"/api-utility#concurrency"},{"t":"queue","d":"An EventEmitter that emits a change event when a task is either","k":"queue eventemitter emits change event","l":"/api-utility#queue"},{"t":"counters","d":"Provides access to internal task counters.","k":"counters provides access internal","l":"/api-utility#counters"},{"t":"simd","d":"Get and set use of SIMD vector unit instructions. Requires libvips to have been compiled with liborc support.","k":"simd vector unit instructions libvips compiled liborc","l":"/api-utility#simd"}] \ No newline at end of file diff --git a/lib/output.js b/lib/output.js index 750314ea6..ef2b01b5f 100644 --- a/lib/output.js +++ b/lib/output.js @@ -82,6 +82,8 @@ function toFile (fileOut, callback) { * Write output to a Buffer. * JPEG, PNG, WebP, AVIF, TIFF, GIF and raw pixel data output are supported. * + * Use {@link toFormat} or one of the format-specific functions such as {@link jpeg}, {@link png} etc. to set the output format. + * * If no explicit format is set, the output format will match the input image, except SVG input which becomes PNG output. * * By default all metadata will be removed, which includes EXIF-based orientation. @@ -108,6 +110,7 @@ function toFile (fileOut, callback) { * * @example * sharp(input) + * .png() * .toBuffer({ resolveWithObject: true }) * .then(({ data, info }) => { ... }) * .catch(err => { ... });