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Add code usage examples for output-related functions
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Lovell Fuller
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@ -31,6 +31,19 @@ A `Promise` is returned when `callback` is not provided.
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`channels` and `premultiplied` (indicating if premultiplication was used).
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When using a crop strategy also contains `cropOffsetLeft` and `cropOffsetTop`.
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**Examples**
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```javascript
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sharp(input)
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.toFile('output.png', (err, info) => { ... });
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```
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```javascript
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sharp(input)
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.toFile('output.png')
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.then(info => { ... })
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.catch(err => { ... });
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```
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- Throws **[Error][13]** Invalid parameters
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@ -58,6 +71,27 @@ A `Promise` is returned when `callback` is not provided.
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- `options.resolveWithObject` **[Boolean][16]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
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- `callback` **[Function][12]?**
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**Examples**
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```javascript
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sharp(input)
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.toBuffer((err, data, info) => { ... });
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```
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```javascript
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sharp(input)
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.toBuffer()
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.then(data => { ... })
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.catch(err => { ... });
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```
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```javascript
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sharp(input)
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.toBuffer({ resolveWithObject: true })
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.then(({ data, info }) => { ... })
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.catch(err => { ... });
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```
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Returns **[Promise][14]<[Buffer][17]>** when no callback is provided
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## withMetadata
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@ -71,6 +105,14 @@ This will also convert to and add a web-friendly sRGB ICC profile.
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- `withMetadata` **[Object][15]?**
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- `withMetadata.orientation` **[Number][18]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
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**Examples**
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```javascript
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sharp('input.jpg')
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.withMetadata()
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.toFile('output-with-metadata.jpg')
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.then(info => { ... });
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```
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- Throws **[Error][13]** Invalid parameters
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@ -92,6 +134,17 @@ Use these JPEG options for output image.
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- `options.optimizeScans` **[Boolean][16]** alternative spelling of optimiseScans (optional, default `false`)
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- `options.force` **[Boolean][16]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
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**Examples**
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```javascript
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// Convert any input to very high quality JPEG output
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const data = await sharp(input)
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.jpeg({
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quality: 100,
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chromaSubsampling: '4:4:4'
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})
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.toBuffer();
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```
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- Throws **[Error][13]** Invalid options
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@ -101,6 +154,9 @@ Returns **Sharp**
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Use these PNG options for output image.
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PNG output is always full colour at 8 or 16 bits per pixel.
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Indexed PNG input at 1, 2 or 4 bits per pixel is converted to 8 bits per pixel.
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**Parameters**
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- `options` **[Object][15]?**
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@ -109,6 +165,14 @@ Use these PNG options for output image.
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- `options.adaptiveFiltering` **[Boolean][16]** use adaptive row filtering (optional, default `false`)
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- `options.force` **[Boolean][16]** force PNG output, otherwise attempt to use input format (optional, default `true`)
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**Examples**
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```javascript
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// Convert any input to PNG output
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const data = await sharp(input)
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.png()
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.toBuffer();
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```
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- Throws **[Error][13]** Invalid options
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@ -127,6 +191,14 @@ Use these WebP options for output image.
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- `options.nearLossless` **[Boolean][16]** use near_lossless compression mode (optional, default `false`)
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- `options.force` **[Boolean][16]** force WebP output, otherwise attempt to use input format (optional, default `true`)
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**Examples**
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```javascript
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// Convert any input to lossless WebP output
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const data = await sharp(input)
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.webp({ lossless: true })
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.toBuffer();
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```
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- Throws **[Error][13]** Invalid options
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@ -147,6 +219,18 @@ Use these TIFF options for output image.
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- `options.yres` **[Number][18]** vertical resolution in pixels/mm (optional, default `1.0`)
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- `options.squash` **[Boolean][16]** squash 8-bit images down to 1 bit (optional, default `false`)
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**Examples**
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```javascript
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// Convert SVG input to LZW-compressed, 1 bit per pixel TIFF output
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sharp('input.svg')
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.tiff({
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compression: 'lzw',
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squash: true
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})
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.toFile('1-bpp-output.tiff')
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.then(info => { ... });
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```
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- Throws **[Error][13]** Invalid options
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@ -156,6 +240,15 @@ Returns **Sharp**
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Force output to be raw, uncompressed uint8 pixel data.
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**Examples**
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```javascript
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// Extract raw RGB pixel data from JPEG input
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const { data, info } = await sharp('input.jpg')
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.raw()
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.toBuffer({ resolveWithObject: true });
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```
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Returns **Sharp**
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## toFormat
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@ -167,6 +260,14 @@ Force output to a given format.
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- `format` **([String][11] \| [Object][15])** as a String or an Object with an 'id' attribute
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- `options` **[Object][15]** output options
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**Examples**
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```javascript
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// Convert any input to PNG output
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const data = await sharp(input)
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.toFormat('png')
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.toBuffer();
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```
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- Throws **[Error][13]** unsupported format or options
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@ -12,6 +12,16 @@ const sharp = require('../build/Release/sharp.node');
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*
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* A `Promise` is returned when `callback` is not provided.
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*
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* @example
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* sharp(input)
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* .toFile('output.png', (err, info) => { ... });
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*
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* @example
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* sharp(input)
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* .toFile('output.png')
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* .then(info => { ... })
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* .catch(err => { ... });
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*
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* @param {String} fileOut - the path to write the image data to.
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* @param {Function} [callback] - called on completion with two arguments `(err, info)`.
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* `info` contains the output image `format`, `size` (bytes), `width`, `height`,
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@ -58,6 +68,22 @@ function toFile (fileOut, callback) {
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*
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* A `Promise` is returned when `callback` is not provided.
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*
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* @example
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* sharp(input)
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* .toBuffer((err, data, info) => { ... });
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*
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* @example
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* sharp(input)
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* .toBuffer()
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* .then(data => { ... })
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* .catch(err => { ... });
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*
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* @example
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* sharp(input)
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* .toBuffer({ resolveWithObject: true })
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* .then(({ data, info }) => { ... })
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* .catch(err => { ... });
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*
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* @param {Object} [options]
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* @param {Boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
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* @param {Function} [callback]
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@ -76,6 +102,13 @@ function toBuffer (options, callback) {
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* Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
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* The default behaviour, when `withMetadata` is not used, is to strip all metadata and convert to the device-independent sRGB colour space.
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* This will also convert to and add a web-friendly sRGB ICC profile.
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*
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* @example
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* sharp('input.jpg')
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* .withMetadata()
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* .toFile('output-with-metadata.jpg')
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* .then(info => { ... });
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*
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* @param {Object} [withMetadata]
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* @param {Number} [withMetadata.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
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* @returns {Sharp}
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@ -97,6 +130,16 @@ function withMetadata (withMetadata) {
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/**
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* Use these JPEG options for output image.
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*
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* @example
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* // Convert any input to very high quality JPEG output
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* const data = await sharp(input)
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* .jpeg({
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* quality: 100,
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* chromaSubsampling: '4:4:4'
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* })
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* .toBuffer();
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*
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* @param {Object} [options] - output options
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* @param {Number} [options.quality=80] - quality, integer 1-100
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* @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
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@ -148,6 +191,16 @@ function jpeg (options) {
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/**
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* Use these PNG options for output image.
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*
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* PNG output is always full colour at 8 or 16 bits per pixel.
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* Indexed PNG input at 1, 2 or 4 bits per pixel is converted to 8 bits per pixel.
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*
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* @example
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* // Convert any input to PNG output
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* const data = await sharp(input)
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* .png()
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* .toBuffer();
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*
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* @param {Object} [options]
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* @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
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* @param {Number} [options.compressionLevel=9] - zlib compression level, 0-9
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@ -177,6 +230,13 @@ function png (options) {
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/**
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* Use these WebP options for output image.
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*
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* @example
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* // Convert any input to lossless WebP output
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* const data = await sharp(input)
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* .webp({ lossless: true })
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* .toBuffer();
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*
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* @param {Object} [options] - output options
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* @param {Number} [options.quality=80] - quality, integer 1-100
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* @param {Number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100
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@ -212,6 +272,17 @@ function webp (options) {
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/**
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* Use these TIFF options for output image.
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*
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* @example
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* // Convert SVG input to LZW-compressed, 1 bit per pixel TIFF output
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* sharp('input.svg')
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* .tiff({
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* compression: 'lzw',
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* squash: true
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* })
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* .toFile('1-bpp-output.tiff')
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* .then(info => { ... });
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*
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* @param {Object} [options] - output options
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* @param {Number} [options.quality=80] - quality, integer 1-100
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* @param {Boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
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@ -276,6 +347,13 @@ function tiff (options) {
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/**
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* Force output to be raw, uncompressed uint8 pixel data.
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*
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* @example
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* // Extract raw RGB pixel data from JPEG input
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* const { data, info } = await sharp('input.jpg')
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* .raw()
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* .toBuffer({ resolveWithObject: true });
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*
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* @returns {Sharp}
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*/
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function raw () {
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@ -284,6 +362,13 @@ function raw () {
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/**
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* Force output to a given format.
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*
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* @example
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* // Convert any input to PNG output
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* const data = await sharp(input)
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* .toFormat('png')
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* .toBuffer();
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*
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* @param {(String|Object)} format - as a String or an Object with an 'id' attribute
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* @param {Object} options - output options
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* @returns {Sharp}
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