Release v0.17.3

CONTRIBUTING.md

@@ -41,7 +41,6 @@ Any change that modifies the existing public API should be added to the relevant
 
 | Release | WIP branch |
 | ------: | :--------- |
-| v0.17.0 | quill      |
 | v0.18.0 | ridge      |
 | v0.19.0 | suit       |
 
@@ -72,12 +71,7 @@ These can be converted to Markdown by running:
 npm run docs
 ```
 
-The `types.d.ts` TypeScript declaration can be generated by running:
-```sh
-npm run types
-```
-
-Please include documentation and TypeScript declaration updates in any Pull Request that modifies the public API.
+Please include documentation updates in any Pull Request that modifies the public API.
 
 ## Run the tests
 

docs/api-composite.md

@@ -20,10 +20,16 @@ If both `top` and `left` options are provided, they take precedence over `gravit
     -   `options.left` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** the pixel offset from the left edge.
     -   `options.tile` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** set to true to repeat the overlay image across the entire image with the given `gravity`. (optional, default `false`)
     -   `options.cutout` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** set to true to apply only the alpha channel of the overlay image to the input image, giving the appearance of one image being cut out of another. (optional, default `false`)
+    -   `options.density` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** integral number representing the DPI for vector overlay image. (optional, default `72`)
     -   `options.raw` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** describes overlay when using raw pixel data.
         -   `options.raw.width` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
         -   `options.raw.height` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
         -   `options.raw.channels` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+    -   `options.create` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** describes a blank overlay to be created.
+        -   `options.create.width` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+        -   `options.create.height` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+        -   `options.create.channels` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 3-4
+        -   `options.create.background` **([String](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String) \| [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object))?** parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
 
 **Examples**
 

docs/api-constructor.md

@@ -17,10 +17,15 @@
      JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when null or undefined.
 -   `options` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** if present, is an Object with optional attributes.
     -   `options.density` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** integral number representing the DPI for vector images. (optional, default `72`)
-    -   `options.raw` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** describes raw pixel image data. See `raw()` for pixel ordering.
+    -   `options.raw` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** describes raw pixel input image data. See `raw()` for pixel ordering.
         -   `options.raw.width` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
         -   `options.raw.height` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
-        -   `options.raw.channels` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+        -   `options.raw.channels` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 1-4
+    -   `options.create` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** describes a new image to be created.
+        -   `options.create.width` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+        -   `options.create.height` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 
+        -   `options.create.channels` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** 3-4
+        -   `options.create.background` **([String](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String) \| [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object))?** parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
 
 **Examples**
 
@@ -46,6 +51,21 @@ var transformer = sharp()
 readableStream.pipe(transformer).pipe(writableStream);
 ```
 
+```javascript
+// Create a blank 300x200 PNG image of semi-transluent red pixels
+sharp(null, {
+  create: {
+    width: 300,
+    height: 200,
+    channels: 4,
+    background: { r: 255, g: 0, b: 0, alpha: 128 }
+  }
+})
+.png()
+.toBuffer()
+.then( ... );
+```
+
 -   Throws **[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error)** Invalid parameters
 
 Returns **[Sharp](#sharp)** 

docs/api-output.md

@@ -40,15 +40,17 @@ Write output to a Buffer.
 JPEG, PNG, WebP, and RAW output are supported.
 By default, the format will match the input image, except GIF and SVG input which become PNG output.
 
-`callback`, if present, gets three arguments `(err, buffer, info)` where:
+`callback`, if present, gets three arguments `(err, data, info)` where:
 
--   `err` is an error message, if any.
--   `buffer` is the output image data.
+-   `err` is an error, if any.
+-   `data` is the output image data.
 -   `info` contains the output image `format`, `size` (bytes), `width`, `height` and `channels`.
-    A Promises/A+ promise is returned when `callback` is not provided.
+    A Promise is returned when `callback` is not provided.
 
 **Parameters**
 
+-   `options` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** 
+    -   `options.resolveWithObject` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
 -   `callback` **[Function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function)?** 
 
 Returns **[Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise)<[Buffer](https://nodejs.org/api/buffer.html)>** when no callback is provided
@@ -134,6 +136,8 @@ Use these TIFF options for output image.
 -   `options` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)?** output options
     -   `options.quality` **[Number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)?** quality, integer 1-100 (optional, default `80`)
     -   `options.force` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** force TIFF output, otherwise attempt to use input format (optional, default `true`)
+    -   `options.compression` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** compression options: lzw, deflate, jpeg (optional, default `'jpeg'`)
+    -   `options.predictor` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** compression predictor options: none, horizontal, float (optional, default `'none'`)
 
 
 -   Throws **[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error)** Invalid options

docs/api-resize.md

@@ -17,6 +17,7 @@ By default, the resized image is centre cropped to the exact size specified.
 
 Possible reduction kernels are:
 
+-   `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation).
 -   `cubic`: Use a [Catmull-Rom spline](https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline).
 -   `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
 -   `lanczos3`: Use a Lanczos kernel with `a=3` (the default).

docs/changelog.md

@@ -4,6 +4,24 @@
 
 Requires libvips v8.4.2.
 
+#### v0.17.3 - 1<sup>st</sup> April 2017
+
+* Allow toBuffer to optionally resolve a Promise with both info and data.
+  [#143](https://github.com/lovell/sharp/issues/143)
+  [@salzhrani](https://github.com/salzhrani)
+
+* Create blank image of given width, height, channels and background.
+  [#470](https://github.com/lovell/sharp/issues/470)
+  [@pjarts](https://github.com/pjarts)
+
+* Add support for the "nearest" kernel for image reductions.
+  [#732](https://github.com/lovell/sharp/pull/732)
+  [@alice0meta](https://github.com/alice0meta)
+
+* Add support for TIFF compression and predictor options.
+  [#738](https://github.com/lovell/sharp/pull/738)
+  [@kristojorg](https://github.com/kristojorg)
+
 #### v0.17.2 - 11<sup>th</sup> February 2017
 
 * Ensure Readable side of Stream can start flowing after Writable side has finished.

docs/index.md

@@ -97,6 +97,8 @@ the help and code contributions of the following people:
 * [Matthias Thoemmes](https://github.com/cmtt)
 * [Patrick Paskaris](https://github.com/ppaskaris)
 * [Jérémy Lal](https://github.com/kapouer)
+* [Alice Monday](https://github.com/alice0meta)
+* [Kristo Jorgenson](https://github.com/kristojorg)
 
 Thank you!
 

docs/install.md

@@ -12,7 +12,7 @@ yarn add sharp
 
 * Node v4+
 * C++11 compatible compiler such as gcc 4.8+, clang 3.0+ or MSVC 2013+
-* [node-gyp](https://github.com/TooTallNate/node-gyp#installation) and its dependencies
+* [node-gyp](https://github.com/TooTallNate/node-gyp#installation) and its dependencies (includes Python)
 
 ### Linux
 
@@ -27,7 +27,7 @@ Most recent Linux-based operating systems with glibc running on x64 and ARMv6+ C
 * Debian 7, 8
 * Ubuntu 12.04, 14.04, 16.04
 * Centos 7
-* Fedora 23, 24
+* Fedora
 * openSUSE 13.2
 * Archlinux
 * Raspbian Jessie
@@ -83,9 +83,11 @@ cd /usr/ports/graphics/vips/ && make install clean
 
 ### Heroku
 
-[Alessandro Tagliapietra](https://github.com/alex88) maintains an
-[Heroku buildpack for libvips](https://github.com/alex88/heroku-buildpack-vips)
-and its dependencies.
+libvips and its dependencies are fetched and stored within `node_modules\sharp\vendor` during `npm install`.
+This involves an automated HTTPS download of approximately 6.5MB.
+
+Set [NODE_MODULES_CACHE](https://devcenter.heroku.com/articles/nodejs-support#cache-behavior)
+to `false` when using the `yarn` package manager.
 
 ### Docker
 
@@ -135,7 +137,6 @@ You can now download your deployment ZIP using `scp` and upload it to Lambda. Be
 * [gulp-responsive](https://www.npmjs.com/package/gulp-responsive)
 * [grunt-sharp](https://www.npmjs.com/package/grunt-sharp)
 
-
 ### CLI tools
 
 * [sharp-cli](https://www.npmjs.com/package/sharp-cli)

lib/channel.js

@@ -27,7 +27,7 @@ const bool = {
  * @returns {Sharp}
  * @throws {Error} Invalid channel
  */
-const extractChannel = function extractChannel (channel) {
+function extractChannel (channel) {
   if (channel === 'red') {
     channel = 0;
   } else if (channel === 'green') {
@@ -41,7 +41,7 @@ const extractChannel = function extractChannel (channel) {
     throw new Error('Cannot extract invalid channel ' + channel);
   }
   return this;
-};
+}
 
 /**
  * Join one or more channels to the image.
@@ -59,7 +59,7 @@ const extractChannel = function extractChannel (channel) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const joinChannel = function joinChannel (images, options) {
+function joinChannel (images, options) {
   if (Array.isArray(images)) {
     images.forEach(function (image) {
       this.options.joinChannelIn.push(this._createInputDescriptor(image, options));
@@ -68,7 +68,7 @@ const joinChannel = function joinChannel (images, options) {
     this.options.joinChannelIn.push(this._createInputDescriptor(images, options));
   }
   return this;
-};
+}
 
 /**
  * Perform a bitwise boolean operation on all input image channels (bands) to produce a single channel output image.
@@ -86,14 +86,14 @@ const joinChannel = function joinChannel (images, options) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const bandbool = function bandbool (boolOp) {
+function bandbool (boolOp) {
   if (is.string(boolOp) && is.inArray(boolOp, ['and', 'or', 'eor'])) {
     this.options.bandBoolOp = boolOp;
   } else {
     throw new Error('Invalid bandbool operation ' + boolOp);
   }
   return this;
-};
+}
 
 /**
  * Decorate the Sharp prototype with channel-related functions.

lib/colour.js

@@ -27,7 +27,7 @@ const colourspace = {
  * @returns {Sharp}
  * @throws {Error} Invalid parameter
  */
-const background = function background (rgba) {
+function background (rgba) {
   const colour = color(rgba);
   this.options.background = [
     colour.red(),
@@ -36,7 +36,7 @@ const background = function background (rgba) {
     Math.round(colour.alpha() * 255)
   ];
   return this;
-};
+}
 
 /**
  * Convert to 8-bit greyscale; 256 shades of grey.
@@ -48,19 +48,19 @@ const background = function background (rgba) {
  * @param {Boolean} [greyscale=true]
  * @returns {Sharp}
  */
-const greyscale = function greyscale (greyscale) {
+function greyscale (greyscale) {
   this.options.greyscale = is.bool(greyscale) ? greyscale : true;
   return this;
-};
+}
 
 /**
  * Alternative spelling of `greyscale`.
  * @param {Boolean} [grayscale=true]
  * @returns {Sharp}
  */
-const grayscale = function grayscale (grayscale) {
+function grayscale (grayscale) {
   return this.greyscale(grayscale);
-};
+}
 
 /**
  * Set the output colourspace.
@@ -69,13 +69,13 @@ const grayscale = function grayscale (grayscale) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const toColourspace = function toColourspace (colourspace) {
+function toColourspace (colourspace) {
   if (!is.string(colourspace)) {
     throw new Error('Invalid output colourspace ' + colourspace);
   }
   this.options.colourspace = colourspace;
   return this;
-};
+}
 
 /**
  * Alternative spelling of `toColourspace`.
@@ -83,9 +83,9 @@ const toColourspace = function toColourspace (colourspace) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const toColorspace = function toColorspace (colorspace) {
+function toColorspace (colorspace) {
   return this.toColourspace(colorspace);
-};
+}
 
 /**
  * Decorate the Sharp prototype with colour-related functions.

lib/composite.js

@@ -33,14 +33,20 @@ const is = require('./is');
  * @param {Number} [options.left] - the pixel offset from the left edge.
  * @param {Boolean} [options.tile=false] - set to true to repeat the overlay image across the entire image with the given `gravity`.
  * @param {Boolean} [options.cutout=false] - set to true to apply only the alpha channel of the overlay image to the input image, giving the appearance of one image being cut out of another.
+ * @param {Number} [options.density=72] - integral number representing the DPI for vector overlay image.
  * @param {Object} [options.raw] - describes overlay when using raw pixel data.
  * @param {Number} [options.raw.width]
  * @param {Number} [options.raw.height]
  * @param {Number} [options.raw.channels]
+ * @param {Object} [options.create] - describes a blank overlay to be created.
+ * @param {Number} [options.create.width]
+ * @param {Number} [options.create.height]
+ * @param {Number} [options.create.channels] - 3-4
+ * @param {String|Object} [options.create.background] - parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const overlayWith = function overlayWith (overlay, options) {
+function overlayWith (overlay, options) {
   this.options.overlay = this._createInputDescriptor(overlay, options, {
     allowStream: false
   });
@@ -81,7 +87,7 @@ const overlayWith = function overlayWith (overlay, options) {
     }
   }
   return this;
-};
+}
 
 /**
  * Decorate the Sharp prototype with composite-related functions.

lib/constructor.js

@@ -54,16 +54,35 @@ let versions = {
  *   });
  * readableStream.pipe(transformer).pipe(writableStream);
  *
+ * @example
+ * // Create a blank 300x200 PNG image of semi-transluent red pixels
+ * sharp(null, {
+ *   create: {
+ *     width: 300,
+ *     height: 200,
+ *     channels: 4,
+ *     background: { r: 255, g: 0, b: 0, alpha: 128 }
+ *   }
+ * })
+ * .png()
+ * .toBuffer()
+ * .then( ... );
+ *
  * @param {(Buffer|String)} [input] - if present, can be
  *  a Buffer containing JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data, or
  *  a String containing the path to an JPEG, PNG, WebP, GIF, SVG or TIFF image file.
  *  JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data can be streamed into the object when null or undefined.
  * @param {Object} [options] - if present, is an Object with optional attributes.
  * @param {Number} [options.density=72] - integral number representing the DPI for vector images.
- * @param {Object} [options.raw] - describes raw pixel image data. See `raw()` for pixel ordering.
+ * @param {Object} [options.raw] - describes raw pixel input image data. See `raw()` for pixel ordering.
  * @param {Number} [options.raw.width]
  * @param {Number} [options.raw.height]
- * @param {Number} [options.raw.channels]
+ * @param {Number} [options.raw.channels] - 1-4
+ * @param {Object} [options.create] - describes a new image to be created.
+ * @param {Number} [options.create.width]
+ * @param {Number} [options.create.height]
+ * @param {Number} [options.create.channels] - 3-4
+ * @param {String|Object} [options.create.background] - parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -134,6 +153,7 @@ const Sharp = function (input, options) {
     streamOut: false,
     withMetadata: false,
     withMetadataOrientation: -1,
+    resolveWithObject: false,
     // output format
     jpegQuality: 80,
     jpegProgressive: false,
@@ -149,6 +169,8 @@ const Sharp = function (input, options) {
     webpLossless: false,
     webpNearLossless: false,
     tiffQuality: 80,
+    tiffCompression: 'jpeg',
+    tiffPredictor: 'none',
     tileSize: 256,
     tileOverlap: 0,
     // Function to notify of queue length changes

lib/input.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const util = require('util');
+const color = require('color');
 const is = require('./is');
 const sharp = require('../build/Release/sharp.node');
 
@@ -8,7 +9,7 @@ const sharp = require('../build/Release/sharp.node');
  * Create Object containing input and input-related options.
  * @private
  */
-const _createInputDescriptor = function _createInputDescriptor (input, inputOptions, containerOptions) {
+function _createInputDescriptor (input, inputOptions, containerOptions) {
   const inputDescriptor = {};
   if (is.string(input)) {
     // filesystem
@@ -46,11 +47,35 @@ const _createInputDescriptor = function _createInputDescriptor (input, inputOpti
         throw new Error('Expected width, height and channels for raw pixel input');
       }
     }
+    // Create new image
+    if (is.defined(inputOptions.create)) {
+      if (
+        is.object(inputOptions.create) &&
+        is.integer(inputOptions.create.width) && is.inRange(inputOptions.create.width, 1, this.constructor.maximum.width) &&
+        is.integer(inputOptions.create.height) && is.inRange(inputOptions.create.height, 1, this.constructor.maximum.height) &&
+        is.integer(inputOptions.create.channels) && is.inRange(inputOptions.create.channels, 3, 4) &&
+        is.defined(inputOptions.create.background)
+      ) {
+        inputDescriptor.createWidth = inputOptions.create.width;
+        inputDescriptor.createHeight = inputOptions.create.height;
+        inputDescriptor.createChannels = inputOptions.create.channels;
+        const background = color(inputOptions.create.background);
+        inputDescriptor.createBackground = [
+          background.red(),
+          background.green(),
+          background.blue(),
+          Math.round(background.alpha() * 255)
+        ];
+        delete inputDescriptor.buffer;
+      } else {
+        throw new Error('Expected width, height, channels and background to create a new input image');
+      }
+    }
   } else if (is.defined(inputOptions)) {
     throw new Error('Invalid input options ' + inputOptions);
   }
   return inputDescriptor;
-};
+}
 
 /**
  * Handle incoming Buffer chunk on Writable Stream.
@@ -59,7 +84,7 @@ const _createInputDescriptor = function _createInputDescriptor (input, inputOpti
  * @param {String} encoding - unused
  * @param {Function} callback
  */
-const _write = function _write (chunk, encoding, callback) {
+function _write (chunk, encoding, callback) {
   /* istanbul ignore else */
   if (Array.isArray(this.options.input.buffer)) {
     /* istanbul ignore else */
@@ -78,26 +103,26 @@ const _write = function _write (chunk, encoding, callback) {
   } else {
     callback(new Error('Unexpected data on Writable Stream'));
   }
-};
+}
 
 /**
  * Flattens the array of chunks accumulated in input.buffer.
  * @private
  */
-const _flattenBufferIn = function _flattenBufferIn () {
+function _flattenBufferIn () {
   if (this._isStreamInput()) {
     this.options.input.buffer = Buffer.concat(this.options.input.buffer);
   }
-};
+}
 
 /**
  * Are we expecting Stream-based input?
  * @private
  * @returns {Boolean}
  */
-const _isStreamInput = function _isStreamInput () {
+function _isStreamInput () {
   return Array.isArray(this.options.input.buffer);
-};
+}
 
 /**
  * Take a "snapshot" of the Sharp instance, returning a new instance.
@@ -114,7 +139,7 @@ const _isStreamInput = function _isStreamInput () {
  *
  * @returns {Sharp}
  */
-const clone = function clone () {
+function clone () {
   const that = this;
   // Clone existing options
   const clone = this.constructor.call();
@@ -127,7 +152,7 @@ const clone = function clone () {
     clone.emit('finish');
   });
   return clone;
-};
+}
 
 /**
  * Fast access to image metadata without decoding any compressed image data.
@@ -162,7 +187,7 @@ const clone = function clone () {
  * @param {Function} [callback] - called with the arguments `(err, metadata)`
  * @returns {Promise<Object>|Sharp}
  */
-const metadata = function metadata (callback) {
+function metadata (callback) {
   const that = this;
   if (is.fn(callback)) {
     if (this._isStreamInput()) {
@@ -200,7 +225,7 @@ const metadata = function metadata (callback) {
       });
     }
   }
-};
+}
 
 /**
  * Do not process input images where the number of pixels (width * height) exceeds this limit.
@@ -210,7 +235,7 @@ const metadata = function metadata (callback) {
  * @returns {Sharp}
  * @throws {Error} Invalid limit
 */
-const limitInputPixels = function limitInputPixels (limit) {
+function limitInputPixels (limit) {
   // if we pass in false we represent the integer as 0 to disable
   if (limit === false) {
     limit = 0;
@@ -223,7 +248,7 @@ const limitInputPixels = function limitInputPixels (limit) {
     throw new Error('Invalid pixel limit (0 to ' + this.constructor.maximum.pixels + ') ' + limit);
   }
   return this;
-};
+}
 
 /**
  * An advanced setting that switches the libvips access method to `VIPS_ACCESS_SEQUENTIAL`.
@@ -231,10 +256,10 @@ const limitInputPixels = function limitInputPixels (limit) {
  * @param {Boolean} [sequentialRead=true]
  * @returns {Sharp}
  */
-const sequentialRead = function sequentialRead (sequentialRead) {
+function sequentialRead (sequentialRead) {
   this.options.sequentialRead = is.bool(sequentialRead) ? sequentialRead : true;
   return this;
-};
+}
 
 /**
  * Decorate the Sharp prototype with input-related functions.

lib/operation.js

@@ -29,7 +29,7 @@ const is = require('./is');
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const rotate = function rotate (angle) {
+function rotate (angle) {
   if (!is.defined(angle)) {
     this.options.angle = -1;
   } else if (is.integer(angle) && is.inArray(angle, [0, 90, 180, 270])) {
@@ -38,7 +38,7 @@ const rotate = function rotate (angle) {
     throw new Error('Unsupported angle (0, 90, 180, 270) ' + angle);
   }
   return this;
-};
+}
 
 /**
  * Extract a region of the image.
@@ -70,7 +70,7 @@ const rotate = function rotate (angle) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const extract = function extract (options) {
+function extract (options) {
   const suffix = this.options.width === -1 && this.options.height === -1 ? 'Pre' : 'Post';
   ['left', 'top', 'width', 'height'].forEach(function (name) {
     const value = options[name];
@@ -85,7 +85,7 @@ const extract = function extract (options) {
     this.options.rotateBeforePreExtract = true;
   }
   return this;
-};
+}
 
 /**
  * Flip the image about the vertical Y axis. This always occurs after rotation, if any.
@@ -93,10 +93,10 @@ const extract = function extract (options) {
  * @param {Boolean} [flip=true]
  * @returns {Sharp}
  */
-const flip = function flip (flip) {
+function flip (flip) {
   this.options.flip = is.bool(flip) ? flip : true;
   return this;
-};
+}
 
 /**
  * Flop the image about the horizontal X axis. This always occurs after rotation, if any.
@@ -104,10 +104,10 @@ const flip = function flip (flip) {
  * @param {Boolean} [flop=true]
  * @returns {Sharp}
  */
-const flop = function flop (flop) {
+function flop (flop) {
   this.options.flop = is.bool(flop) ? flop : true;
   return this;
-};
+}
 
 /**
  * Sharpen the image.
@@ -121,7 +121,7 @@ const flop = function flop (flop) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const sharpen = function sharpen (sigma, flat, jagged) {
+function sharpen (sigma, flat, jagged) {
   if (!is.defined(sigma)) {
     // No arguments: default to mild sharpen
     this.options.sharpenSigma = -1;
@@ -151,7 +151,7 @@ const sharpen = function sharpen (sigma, flat, jagged) {
     throw new Error('Invalid sharpen sigma (0.01 - 10000) ' + sigma);
   }
   return this;
-};
+}
 
 /**
  * Blur the image.
@@ -161,7 +161,7 @@ const sharpen = function sharpen (sigma, flat, jagged) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const blur = function blur (sigma) {
+function blur (sigma) {
   if (!is.defined(sigma)) {
     // No arguments: default to mild blur
     this.options.blurSigma = -1;
@@ -175,7 +175,7 @@ const blur = function blur (sigma) {
     throw new Error('Invalid blur sigma (0.3 - 1000.0) ' + sigma);
   }
   return this;
-};
+}
 
 /**
  * Extends/pads the edges of the image with the colour provided to the `background` method.
@@ -198,7 +198,7 @@ const blur = function blur (sigma) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
 */
-const extend = function extend (extend) {
+function extend (extend) {
   if (is.integer(extend) && extend > 0) {
     this.options.extendTop = extend;
     this.options.extendBottom = extend;
@@ -219,17 +219,17 @@ const extend = function extend (extend) {
     throw new Error('Invalid edge extension ' + extend);
   }
   return this;
-};
+}
 
 /**
  * Merge alpha transparency channel, if any, with `background`.
  * @param {Boolean} [flatten=true]
  * @returns {Sharp}
  */
-const flatten = function flatten (flatten) {
+function flatten (flatten) {
   this.options.flatten = is.bool(flatten) ? flatten : true;
   return this;
-};
+}
 
 /**
  * Trim "boring" pixels from all edges that contain values within a percentage similarity of the top-left pixel.
@@ -237,7 +237,7 @@ const flatten = function flatten (flatten) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const trim = function trim (tolerance) {
+function trim (tolerance) {
   if (!is.defined(tolerance)) {
     this.options.trimTolerance = 10;
   } else if (is.integer(tolerance) && is.inRange(tolerance, 1, 99)) {
@@ -246,7 +246,7 @@ const trim = function trim (tolerance) {
     throw new Error('Invalid trim tolerance (1 to 99) ' + tolerance);
   }
   return this;
-};
+}
 
 /**
  * Apply a gamma correction by reducing the encoding (darken) pre-resize at a factor of `1/gamma`
@@ -258,7 +258,7 @@ const trim = function trim (tolerance) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const gamma = function gamma (gamma) {
+function gamma (gamma) {
   if (!is.defined(gamma)) {
     // Default gamma correction of 2.2 (sRGB)
     this.options.gamma = 2.2;
@@ -268,36 +268,36 @@ const gamma = function gamma (gamma) {
     throw new Error('Invalid gamma correction (1.0 to 3.0) ' + gamma);
   }
   return this;
-};
+}
 
 /**
  * Produce the "negative" of the image.
  * @param {Boolean} [negate=true]
  * @returns {Sharp}
  */
-const negate = function negate (negate) {
+function negate (negate) {
   this.options.negate = is.bool(negate) ? negate : true;
   return this;
-};
+}
 
 /**
  * Enhance output image contrast by stretching its luminance to cover the full dynamic range.
  * @param {Boolean} [normalise=true]
  * @returns {Sharp}
  */
-const normalise = function normalise (normalise) {
+function normalise (normalise) {
   this.options.normalise = is.bool(normalise) ? normalise : true;
   return this;
-};
+}
 
 /**
  * Alternative spelling of normalise.
  * @param {Boolean} [normalize=true]
  * @returns {Sharp}
  */
-const normalize = function normalize (normalize) {
+function normalize (normalize) {
   return this.normalise(normalize);
-};
+}
 
 /**
  * Convolve the image with the specified kernel.
@@ -324,7 +324,7 @@ const normalize = function normalize (normalize) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const convolve = function convolve (kernel) {
+function convolve (kernel) {
   if (!is.object(kernel) || !Array.isArray(kernel.kernel) ||
       !is.integer(kernel.width) || !is.integer(kernel.height) ||
       !is.inRange(kernel.width, 3, 1001) || !is.inRange(kernel.height, 3, 1001) ||
@@ -348,7 +348,7 @@ const convolve = function convolve (kernel) {
   }
   this.options.convKernel = kernel;
   return this;
-};
+}
 
 /**
  * Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
@@ -359,7 +359,7 @@ const convolve = function convolve (kernel) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const threshold = function threshold (threshold, options) {
+function threshold (threshold, options) {
   if (!is.defined(threshold)) {
     this.options.threshold = 128;
   } else if (is.bool(threshold)) {
@@ -375,7 +375,7 @@ const threshold = function threshold (threshold, options) {
     this.options.thresholdGrayscale = false;
   }
   return this;
-};
+}
 
 /**
  * Perform a bitwise boolean operation with operand image.
@@ -393,7 +393,7 @@ const threshold = function threshold (threshold, options) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const boolean = function boolean (operand, operator, options) {
+function boolean (operand, operator, options) {
   this.options.boolean = this._createInputDescriptor(operand, options);
   if (is.string(operator) && is.inArray(operator, ['and', 'or', 'eor'])) {
     this.options.booleanOp = operator;
@@ -401,7 +401,7 @@ const boolean = function boolean (operand, operator, options) {
     throw new Error('Invalid boolean operator ' + operator);
   }
   return this;
-};
+}
 
 /**
  * Decorate the Sharp prototype with operation-related functions.

lib/output.js

@@ -19,7 +19,7 @@ const sharp = require('../build/Release/sharp.node');
  * @returns {Promise<Object>} - when no callback is provided
  * @throws {Error} Invalid parameters
  */
-const toFile = function toFile (fileOut, callback) {
+function toFile (fileOut, callback) {
   if (!fileOut || fileOut.length === 0) {
     const errOutputInvalid = new Error('Invalid output');
     if (is.fn(callback)) {
@@ -41,25 +41,32 @@ const toFile = function toFile (fileOut, callback) {
     }
   }
   return this;
-};
+}
 
 /**
  * Write output to a Buffer.
  * JPEG, PNG, WebP, and RAW output are supported.
  * By default, the format will match the input image, except GIF and SVG input which become PNG output.
  *
- * `callback`, if present, gets three arguments `(err, buffer, info)` where:
- * - `err` is an error message, if any.
- * - `buffer` is the output image data.
+ * `callback`, if present, gets three arguments `(err, data, info)` where:
+ * - `err` is an error, if any.
+ * - `data` is the output image data.
  * - `info` contains the output image `format`, `size` (bytes), `width`, `height` and `channels`.
- * A Promises/A+ promise is returned when `callback` is not provided.
+ * A Promise is returned when `callback` is not provided.
  *
+ * @param {Object} [options]
+ * @param {Boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
  * @param {Function} [callback]
  * @returns {Promise<Buffer>} - when no callback is provided
  */
-const toBuffer = function toBuffer (callback) {
-  return this._pipeline(callback);
-};
+function toBuffer (options, callback) {
+  if (is.object(options)) {
+    if (is.bool(options.resolveWithObject)) {
+      this.options.resolveWithObject = options.resolveWithObject;
+    }
+  }
+  return this._pipeline(is.fn(options) ? options : callback);
+}
 
 /**
  * Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
@@ -70,7 +77,7 @@ const toBuffer = function toBuffer (callback) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const withMetadata = function withMetadata (withMetadata) {
+function withMetadata (withMetadata) {
   this.options.withMetadata = is.bool(withMetadata) ? withMetadata : true;
   if (is.object(withMetadata)) {
     if (is.defined(withMetadata.orientation)) {
@@ -82,7 +89,7 @@ const withMetadata = function withMetadata (withMetadata) {
     }
   }
   return this;
-};
+}
 
 /**
  * Use these JPEG options for output image.
@@ -98,7 +105,7 @@ const withMetadata = function withMetadata (withMetadata) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const jpeg = function jpeg (options) {
+function jpeg (options) {
   if (is.object(options)) {
     if (is.defined(options.quality)) {
       if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
@@ -133,7 +140,7 @@ const jpeg = function jpeg (options) {
     }
   }
   return this._updateFormatOut('jpeg', options);
-};
+}
 
 /**
  * Use these PNG options for output image.
@@ -145,7 +152,7 @@ const jpeg = function jpeg (options) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const png = function png (options) {
+function png (options) {
   if (is.object(options)) {
     if (is.defined(options.progressive)) {
       this._setBooleanOption('pngProgressive', options.progressive);
@@ -162,7 +169,7 @@ const png = function png (options) {
     }
   }
   return this._updateFormatOut('png', options);
-};
+}
 
 /**
  * Use these WebP options for output image.
@@ -175,7 +182,7 @@ const png = function png (options) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const webp = function webp (options) {
+function webp (options) {
   if (is.object(options) && is.defined(options.quality)) {
     if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
       this.options.webpQuality = options.quality;
@@ -197,17 +204,19 @@ const webp = function webp (options) {
     this._setBooleanOption('webpNearLossless', options.nearLossless);
   }
   return this._updateFormatOut('webp', options);
-};
+}
 
 /**
  * Use these TIFF options for output image.
  * @param {Object} [options] - output options
  * @param {Number} [options.quality=80] - quality, integer 1-100
  * @param {Boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
+ * @param {Boolean} [options.compression='jpeg'] - compression options: lzw, deflate, jpeg
+ * @param {Boolean} [options.predictor='none'] - compression predictor options: none, horizontal, float
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const tiff = function tiff (options) {
+function tiff (options) {
   if (is.object(options) && is.defined(options.quality)) {
     if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
       this.options.tiffQuality = options.quality;
@@ -215,16 +224,34 @@ const tiff = function tiff (options) {
       throw new Error('Invalid quality (integer, 1-100) ' + options.quality);
     }
   }
+  // compression
+  if (is.defined(options) && is.defined(options.compression)) {
+    if (is.string(options.compression) && is.inArray(options.compression, ['lzw', 'deflate', 'jpeg', 'none'])) {
+      this.options.tiffCompression = options.compression;
+    } else {
+      const message = `Invalid compression option "${options.compression}". Should be one of: lzw, deflate, jpeg, none`;
+      throw new Error(message);
+    }
+  }
+  // predictor
+  if (is.defined(options) && is.defined(options.predictor)) {
+    if (is.string(options.predictor) && is.inArray(options.predictor, ['none', 'horizontal', 'float'])) {
+      this.options.tiffPredictor = options.predictor;
+    } else {
+      const message = `Invalid predictor option "${options.predictor}". Should be one of: none, horizontal, float`;
+      throw new Error(message);
+    }
+  }
   return this._updateFormatOut('tiff', options);
-};
+}
 
 /**
  * Force output to be raw, uncompressed uint8 pixel data.
  * @returns {Sharp}
  */
-const raw = function raw () {
+function raw () {
   return this._updateFormatOut('raw');
-};
+}
 
 /**
  * Force output to a given format.
@@ -233,7 +260,7 @@ const raw = function raw () {
  * @returns {Sharp}
  * @throws {Error} unsupported format or options
  */
-const toFormat = function toFormat (format, options) {
+function toFormat (format, options) {
   if (is.object(format) && is.string(format.id)) {
     format = format.id;
   }
@@ -241,7 +268,7 @@ const toFormat = function toFormat (format, options) {
     throw new Error('Unsupported output format ' + format);
   }
   return this[format](options);
-};
+}
 
 /**
  * Use tile-based deep zoom (image pyramid) output.
@@ -267,7 +294,7 @@ const toFormat = function toFormat (format, options) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const tile = function tile (tile) {
+function tile (tile) {
   if (is.object(tile)) {
     // Size of square tiles, in pixels
     if (is.defined(tile.size)) {
@@ -312,7 +339,7 @@ const tile = function tile (tile) {
     throw new Error('Invalid tile format ' + this.options.formatOut);
   }
   return this._updateFormatOut('dz');
-};
+}
 
 /**
  * Update the output format unless options.force is false,
@@ -323,10 +350,10 @@ const tile = function tile (tile) {
  * @param {Boolean} [options.force=true] - force output format, otherwise attempt to use input format
  * @returns {Sharp}
  */
-const _updateFormatOut = function _updateFormatOut (formatOut, options) {
+function _updateFormatOut (formatOut, options) {
   this.options.formatOut = (is.object(options) && options.force === false) ? 'input' : formatOut;
   return this;
-};
+}
 
 /**
  * Update a Boolean attribute of the this.options Object.
@@ -335,31 +362,31 @@ const _updateFormatOut = function _updateFormatOut (formatOut, options) {
  * @param {Boolean} val
  * @throws {Error} Invalid key
  */
-const _setBooleanOption = function _setBooleanOption (key, val) {
+function _setBooleanOption (key, val) {
   if (is.bool(val)) {
     this.options[key] = val;
   } else {
     throw new Error('Invalid ' + key + ' (boolean) ' + val);
   }
-};
+}
 
 /**
  * Called by a WriteableStream to notify us it is ready for data.
  * @private
  */
-const _read = function _read () {
+function _read () {
   if (!this.options.streamOut) {
     this.options.streamOut = true;
     this._pipeline();
   }
-};
+}
 
 /**
  * Invoke the C++ image processing pipeline
  * Supports callback, stream and promise variants
  * @private
  */
-const _pipeline = function _pipeline (callback) {
+function _pipeline (callback) {
   const that = this;
   if (typeof callback === 'function') {
     // output=file/buffer
@@ -423,11 +450,15 @@ const _pipeline = function _pipeline (callback) {
       return new Promise(function (resolve, reject) {
         that.on('finish', function () {
           that._flattenBufferIn();
-          sharp.pipeline(that.options, function (err, data) {
+          sharp.pipeline(that.options, function (err, data, info) {
             if (err) {
               reject(err);
             } else {
-              resolve(data);
+              if (that.options.resolveWithObject) {
+                resolve({ data: data, info: info });
+              } else {
+                resolve(data);
+              }
             }
           });
         });
@@ -435,17 +466,21 @@ const _pipeline = function _pipeline (callback) {
     } else {
       // output=promise, input=file/buffer
       return new Promise(function (resolve, reject) {
-        sharp.pipeline(that.options, function (err, data) {
+        sharp.pipeline(that.options, function (err, data, info) {
           if (err) {
             reject(err);
           } else {
-            resolve(data);
+            if (that.options.resolveWithObject) {
+              resolve({ data: data, info: info });
+            } else {
+              resolve(data);
+            }
           }
         });
       });
     }
   }
-};
+}
 
 // Deprecated output options
 /* istanbul ignore next */

lib/resize.js

@@ -36,6 +36,7 @@ const strategy = {
  * @private
  */
 const kernel = {
+  nearest: 'nearest',
   cubic: 'cubic',
   lanczos2: 'lanczos2',
   lanczos3: 'lanczos3'
@@ -62,6 +63,7 @@ const interpolator = {
  * By default, the resized image is centre cropped to the exact size specified.
  *
  * Possible reduction kernels are:
+ * - `nearest`: Use [nearest neighbour interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation).
  * - `cubic`: Use a [Catmull-Rom spline](https://en.wikipedia.org/wiki/Centripetal_Catmull%E2%80%93Rom_spline).
  * - `lanczos2`: Use a [Lanczos kernel](https://en.wikipedia.org/wiki/Lanczos_resampling#Lanczos_kernel) with `a=2`.
  * - `lanczos3`: Use a Lanczos kernel with `a=3` (the default).
@@ -99,7 +101,7 @@ const interpolator = {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const resize = function resize (width, height, options) {
+function resize (width, height, options) {
   if (is.defined(width)) {
     if (is.integer(width) && is.inRange(width, 1, this.constructor.maximum.width)) {
       this.options.width = width;
@@ -142,7 +144,7 @@ const resize = function resize (width, height, options) {
     }
   }
   return this;
-};
+}
 
 /**
  * Crop the resized image to the exact size specified, the default behaviour.
@@ -170,7 +172,7 @@ const resize = function resize (width, height, options) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const crop = function crop (crop) {
+function crop (crop) {
   this.options.canvas = 'crop';
   if (!is.defined(crop)) {
     // Default
@@ -184,11 +186,14 @@ const crop = function crop (crop) {
   } else if (is.integer(crop) && crop >= strategy.entropy) {
     // Strategy
     this.options.crop = crop;
+  } else if (is.string(crop) && is.integer(strategy[crop])) {
+    // Strategy (string)
+    this.options.crop = strategy[crop];
   } else {
     throw is.invalidParameterError('crop', 'valid crop id/name/strategy', crop);
   }
   return this;
-};
+}
 
 /**
  * Preserving aspect ratio, resize the image to the maximum `width` or `height` specified
@@ -213,10 +218,10 @@ const crop = function crop (crop) {
  *
  * @returns {Sharp}
  */
-const embed = function embed () {
+function embed () {
   this.options.canvas = 'embed';
   return this;
-};
+}
 
 /**
  * Preserving aspect ratio, resize the image to be as large as possible
@@ -237,10 +242,10 @@ const embed = function embed () {
  *
  * @returns {Sharp}
  */
-const max = function max () {
+function max () {
   this.options.canvas = 'max';
   return this;
-};
+}
 
 /**
  * Preserving aspect ratio, resize the image to be as small as possible
@@ -250,20 +255,20 @@ const max = function max () {
  *
  * @returns {Sharp}
  */
-const min = function min () {
+function min () {
   this.options.canvas = 'min';
   return this;
-};
+}
 
 /**
  * Ignoring the aspect ratio of the input, stretch the image to
  * the exact `width` and/or `height` provided via `resize`.
  * @returns {Sharp}
  */
-const ignoreAspectRatio = function ignoreAspectRatio () {
+function ignoreAspectRatio () {
   this.options.canvas = 'ignore_aspect';
   return this;
-};
+}
 
 /**
  * Do not enlarge the output image if the input image width *or* height are already less than the required dimensions.
@@ -272,10 +277,10 @@ const ignoreAspectRatio = function ignoreAspectRatio () {
  * @param {Boolean} [withoutEnlargement=true]
  * @returns {Sharp}
 */
-const withoutEnlargement = function withoutEnlargement (withoutEnlargement) {
+function withoutEnlargement (withoutEnlargement) {
   this.options.withoutEnlargement = is.bool(withoutEnlargement) ? withoutEnlargement : true;
   return this;
-};
+}
 
 /**
  * Decorate the Sharp prototype with resize-related functions.

lib/utility.js

@@ -22,7 +22,7 @@ const sharp = require('../build/Release/sharp.node');
  * @param {Number} [options.items=100] - is the maximum number of operations to cache
  * @returns {Object}
  */
-const cache = function cache (options) {
+function cache (options) {
   if (is.bool(options)) {
     if (options) {
       // Default cache settings of 50MB, 20 files, 100 items
@@ -35,7 +35,7 @@ const cache = function cache (options) {
   } else {
     return sharp.cache();
   }
-};
+}
 cache(true);
 
 /**
@@ -57,9 +57,9 @@ cache(true);
  * @param {Number} [concurrency]
  * @returns {Number} concurrency
  */
-const concurrency = function concurrency (concurrency) {
+function concurrency (concurrency) {
   return sharp.concurrency(is.integer(concurrency) ? concurrency : null);
-};
+}
 
 /**
  * Provides access to internal task counters.
@@ -71,9 +71,9 @@ const concurrency = function concurrency (concurrency) {
  *
  * @returns {Object}
  */
-const counters = function counters () {
+function counters () {
   return sharp.counters();
-};
+}
 
 /**
  * Get and set use of SIMD vector unit instructions.
@@ -95,9 +95,9 @@ const counters = function counters () {
  * @param {Boolean} [simd=false]
  * @returns {Boolean}
  */
-const simd = function simd (simd) {
+function simd (simd) {
   return sharp.simd(is.bool(simd) ? simd : null);
-};
+}
 simd(false);
 
 /**

mkdocs.yml

@@ -1,14 +1,13 @@
 site_name: sharp
-site_url: http://sharp.dimens.io/
+site_url: http://sharp.pixelplumbing.com/
 repo_url: https://github.com/lovell/sharp
 site_description: High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images
-copyright: <a href="https://dimens.io/">dimens.io</a>
-google_analytics: ['UA-13034748-12', 'sharp.dimens.io']
+copyright: <a href="https://pixelplumbing.com/">pixelplumbing.com</a>
+google_analytics: ['UA-13034748-12', 'sharp.pixelplumbing.com']
 theme: readthedocs
 markdown_extensions:
   - toc:
       permalink: True
-dev_addr: 0.0.0.0:10101
 pages:
   - Home: index.md
   - Installation: install.md

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sharp",
   "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images",
-  "version": "0.17.2",
+  "version": "0.17.3",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://github.com/lovell/sharp",
   "contributors": [
@@ -32,7 +32,9 @@
     "Matthias Thoemmes <thoemmes@gmail.com>",
     "Patrick Paskaris <patrick@paskaris.gr>",
     "Jérémy Lal <kapouer@melix.org>",
-    "Rahul Nanwani <r.nanwani@gmail.com>"
+    "Rahul Nanwani <r.nanwani@gmail.com>",
+    "Alice Monday <alice0meta@gmail.com>",
+    "Kristo Jorgenson <kristo.jorgenson@gmail.com>"
   ],
   "scripts": {
     "clean": "rm -rf node_modules/ build/ vendor/ coverage/ test/fixtures/output.*",
@@ -70,17 +72,17 @@
     "tar": "^2.2.1"
   },
   "devDependencies": {
-    "async": "^2.1.4",
-    "bufferutil": "^2.0.1",
+    "async": "^2.2.0",
+    "bufferutil": "^3.0.0",
     "cc": "^1.0.0",
-    "cross-env": "^3.1.4",
+    "cross-env": "^4.0.0",
     "documentation": "^4.0.0-beta.18",
     "exif-reader": "^1.0.2",
     "icc": "^1.0.0",
     "mocha": "^3.2.0",
-    "nyc": "^10.1.2",
+    "nyc": "^10.2.0",
     "rimraf": "^2.5.4",
-    "semistandard": "^9.2.1",
+    "semistandard": "^10.0.0",
     "unzip": "^0.1.11"
   },
   "license": "Apache-2.0",

src/common.cc

@@ -44,7 +44,7 @@ namespace sharp {
     InputDescriptor *descriptor = new InputDescriptor;
     if (HasAttr(input, "file")) {
       descriptor->file = AttrAsStr(input, "file");
-    } else {
+    } else if (HasAttr(input, "buffer")) {
       v8::Local<v8::Object> buffer = AttrAs<v8::Object>(input, "buffer");
       descriptor->bufferLength = node::Buffer::Length(buffer);
       descriptor->buffer = node::Buffer::Data(buffer);
@@ -60,6 +60,16 @@ namespace sharp {
       descriptor->rawWidth = AttrTo<uint32_t>(input, "rawWidth");
       descriptor->rawHeight = AttrTo<uint32_t>(input, "rawHeight");
     }
+    // Create new image
+    if (HasAttr(input, "createChannels")) {
+      descriptor->createChannels = AttrTo<uint32_t>(input, "createChannels");
+      descriptor->createWidth = AttrTo<uint32_t>(input, "createWidth");
+      descriptor->createHeight = AttrTo<uint32_t>(input, "createHeight");
+      v8::Local<v8::Object> createBackground = AttrAs<v8::Object>(input, "createBackground");
+      for (unsigned int i = 0; i < 4; i++) {
+        descriptor->createBackground[i] = AttrTo<double>(createBackground, i);
+      }
+    }
     return descriptor;
   }
 
@@ -192,7 +202,6 @@ namespace sharp {
     VImage image;
     ImageType imageType;
     if (descriptor->buffer != nullptr) {
-      // From buffer
       if (descriptor->rawChannels > 0) {
         // Raw, uncompressed pixel data
         image = VImage::new_from_memory(descriptor->buffer, descriptor->bufferLength,
@@ -227,26 +236,41 @@ namespace sharp {
         }
       }
     } else {
-      // From filesystem
-      imageType = DetermineImageType(descriptor->file.data());
-      if (imageType != ImageType::UNKNOWN) {
-        try {
-          vips::VOption *option = VImage::option()->set("access", accessMethod);
-          if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
-            option->set("dpi", static_cast<double>(descriptor->density));
-          }
-          if (imageType == ImageType::MAGICK) {
-            option->set("density", std::to_string(descriptor->density).data());
-          }
-          image = VImage::new_from_file(descriptor->file.data(), option);
-          if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
-            SetDensity(image, descriptor->density);
-          }
-        } catch (...) {
-          throw vips::VError("Input file has corrupt header");
+      if (descriptor->createChannels > 0) {
+        // Create new image
+        std::vector<double> background = {
+          descriptor->createBackground[0],
+          descriptor->createBackground[1],
+          descriptor->createBackground[2]
+        };
+        if (descriptor->createChannels == 4) {
+          background.push_back(descriptor->createBackground[3]);
         }
+        image = VImage::new_matrix(descriptor->createWidth, descriptor->createHeight).new_from_image(background);
+        image.get_image()->Type = VIPS_INTERPRETATION_sRGB;
+        imageType = ImageType::RAW;
       } else {
-        throw vips::VError("Input file is missing or of an unsupported image format");
+        // From filesystem
+        imageType = DetermineImageType(descriptor->file.data());
+        if (imageType != ImageType::UNKNOWN) {
+          try {
+            vips::VOption *option = VImage::option()->set("access", accessMethod);
+            if (imageType == ImageType::SVG || imageType == ImageType::PDF) {
+              option->set("dpi", static_cast<double>(descriptor->density));
+            }
+            if (imageType == ImageType::MAGICK) {
+              option->set("density", std::to_string(descriptor->density).data());
+            }
+            image = VImage::new_from_file(descriptor->file.data(), option);
+            if (imageType == ImageType::SVG || imageType == ImageType::PDF || imageType == ImageType::MAGICK) {
+              SetDensity(image, descriptor->density);
+            }
+          } catch (...) {
+            throw vips::VError("Input file has corrupt header");
+          }
+        } else {
+          throw vips::VError("Input file is missing or of an unsupported image format");
+        }
       }
     }
     return std::make_tuple(image, imageType);

src/common.h

@@ -52,6 +52,10 @@ namespace sharp {
     int rawChannels;
     int rawWidth;
     int rawHeight;
+    int createChannels;
+    int createWidth;
+    int createHeight;
+    double createBackground[4];
 
     InputDescriptor():
       buffer(nullptr),
@@ -59,7 +63,15 @@ namespace sharp {
       density(72),
       rawChannels(0),
       rawWidth(0),
-      rawHeight(0) {}
+      rawHeight(0),
+      createChannels(0),
+      createWidth(0),
+      createHeight(0) {
+        createBackground[0] = 0.0;
+        createBackground[1] = 0.0;
+        createBackground[2] = 0.0;
+        createBackground[3] = 255.0;
+      }
   };
 
   // Convenience methods to access the attributes of a v8::Object

src/pipeline.cc

@@ -392,7 +392,10 @@ class PipelineWorker : public Nan::AsyncWorker {
         if (yresidual < 1.0 || xresidual < 1.0) {
           VipsKernel kernel = static_cast<VipsKernel>(
             vips_enum_from_nick(nullptr, VIPS_TYPE_KERNEL, baton->kernel.data()));
-          if (kernel != VIPS_KERNEL_CUBIC && kernel != VIPS_KERNEL_LANCZOS2 && kernel != VIPS_KERNEL_LANCZOS3) {
+          if (
+            kernel != VIPS_KERNEL_NEAREST && kernel != VIPS_KERNEL_CUBIC && kernel != VIPS_KERNEL_LANCZOS2 &&
+            kernel != VIPS_KERNEL_LANCZOS3
+          ) {
             throw vips::VError("Unknown kernel");
           }
           if (yresidual < 1.0) {
@@ -835,11 +838,16 @@ class PipelineWorker : public Nan::AsyncWorker {
             ->set("alpha_q", baton->webpAlphaQuality));
           baton->formatOut = "webp";
         } else if (baton->formatOut == "tiff" || isTiff || (matchInput && inputImageType == ImageType::TIFF)) {
+          // Cast pixel values to float, if required
+          if (baton->tiffPredictor == VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT) {
+            image = image.cast(VIPS_FORMAT_FLOAT);
+          }
           // Write TIFF to file
           image.tiffsave(const_cast<char*>(baton->fileOut.data()), VImage::option()
             ->set("strip", !baton->withMetadata)
             ->set("Q", baton->tiffQuality)
-            ->set("compression", VIPS_FOREIGN_TIFF_COMPRESSION_JPEG));
+            ->set("compression", baton->tiffCompression)
+            ->set("predictor", baton->tiffPredictor) );
           baton->formatOut = "tiff";
           baton->channels = std::min(baton->channels, 3);
         } else if (baton->formatOut == "dz" || isDz || isDzZip) {
@@ -1100,7 +1108,7 @@ NAN_METHOD(pipeline) {
   // Background colour
   v8::Local<v8::Object> background = AttrAs<v8::Object>(options, "background");
   for (unsigned int i = 0; i < 4; i++) {
-    baton->background[i] = AttrTo<uint32_t>(background, i);
+    baton->background[i] = AttrTo<double>(background, i);
   }
   // Overlay options
   if (HasAttr(options, "overlay")) {
@@ -1140,9 +1148,6 @@ NAN_METHOD(pipeline) {
   baton->threshold = AttrTo<int32_t>(options, "threshold");
   baton->thresholdGrayscale = AttrTo<bool>(options, "thresholdGrayscale");
   baton->trimTolerance = AttrTo<int32_t>(options, "trimTolerance");
-  if (baton->accessMethod == VIPS_ACCESS_SEQUENTIAL && baton->trimTolerance != 0) {
-    baton->accessMethod = VIPS_ACCESS_RANDOM;
-  }
   baton->gamma = AttrTo<double>(options, "gamma");
   baton->greyscale = AttrTo<bool>(options, "greyscale");
   baton->normalise = AttrTo<bool>(options, "normalise");
@@ -1199,6 +1204,14 @@ NAN_METHOD(pipeline) {
   baton->webpLossless = AttrTo<bool>(options, "webpLossless");
   baton->webpNearLossless = AttrTo<bool>(options, "webpNearLossless");
   baton->tiffQuality = AttrTo<uint32_t>(options, "tiffQuality");
+  // tiff compression options
+  baton->tiffCompression = static_cast<VipsForeignTiffCompression>(
+  vips_enum_from_nick(nullptr, VIPS_TYPE_FOREIGN_TIFF_COMPRESSION,
+    AttrAsStr(options, "tiffCompression").data()));
+  baton->tiffPredictor = static_cast<VipsForeignTiffPredictor>(
+  vips_enum_from_nick(nullptr, VIPS_TYPE_FOREIGN_TIFF_PREDICTOR,
+    AttrAsStr(options, "tiffPredictor").data()));
+
   // Tile output
   baton->tileSize = AttrTo<uint32_t>(options, "tileSize");
   baton->tileOverlap = AttrTo<uint32_t>(options, "tileOverlap");
@@ -1217,6 +1230,12 @@ NAN_METHOD(pipeline) {
     baton->tileLayout = VIPS_FOREIGN_DZ_LAYOUT_DZ;
   }
   baton->tileFormat = AttrAsStr(options, "tileFormat");
+  // Force random access for certain operations
+  if (baton->accessMethod == VIPS_ACCESS_SEQUENTIAL && (
+    baton->trimTolerance != 0 || baton->normalise ||
+    baton->crop == 16 || baton->crop == 17)) {
+    baton->accessMethod = VIPS_ACCESS_RANDOM;
+  }
 
   // Function to notify of queue length changes
   Nan::Callback *queueListener = new Nan::Callback(AttrAs<v8::Function>(options, "queueListener"));

src/pipeline.h

@@ -104,6 +104,8 @@ struct PipelineBaton {
   bool webpNearLossless;
   bool webpLossless;
   int tiffQuality;
+  VipsForeignTiffCompression tiffCompression;
+  VipsForeignTiffPredictor tiffPredictor;
   std::string err;
   bool withMetadata;
   int withMetadataOrientation;
@@ -172,6 +174,8 @@ struct PipelineBaton {
     pngAdaptiveFiltering(true),
     webpQuality(80),
     tiffQuality(80),
+    tiffCompression(VIPS_FOREIGN_TIFF_COMPRESSION_JPEG),
+    tiffPredictor(VIPS_FOREIGN_TIFF_PREDICTOR_NONE),
     withMetadata(false),
     withMetadataOrientation(-1),
     convKernelWidth(0),

test/bench/random.js

@@ -15,7 +15,7 @@ const min = 320;
 const max = 960;
 
 const randomDimension = function () {
-  return Math.ceil(Math.random() * (max - min) + min);
+  return Math.ceil((Math.random() * (max - min)) + min);
 };
 
 new Benchmark.Suite('random').add('imagemagick', {

test/fixtures/index.js

@@ -25,8 +25,8 @@ const fingerprint = function (image, callback) {
         let fingerprint = '';
         for (let col = 0; col < 8; col++) {
           for (let row = 0; row < 8; row++) {
-            const left = data[row * 8 + col];
-            const right = data[row * 8 + col + 1];
+            const left = data[(row * 8) + col];
+            const right = data[(row * 8) + col + 1];
             fingerprint = fingerprint + (left < right ? '1' : '0');
           }
         }
@@ -84,6 +84,7 @@ module.exports = {
   inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp
   inputTiff: getPath('G31D.TIF'), // http://www.fileformat.info/format/tiff/sample/e6c9a6e5253348f4aef6d17b534360ab/index.htm
   inputTiffCielab: getPath('cielab-dagams.tiff'), // https://github.com/lovell/sharp/issues/646
+  inputTiffUncompressed: getPath('uncompressed_tiff.tiff'), // https://code.google.com/archive/p/imagetestsuite/wikis/TIFFTestSuite.wiki file: 0c84d07e1b22b76f24cccc70d8788e4a.tif
   inputGif: getPath('Crash_test.gif'), // http://upload.wikimedia.org/wikipedia/commons/e/e3/Crash_test.gif
   inputGifGreyPlusAlpha: getPath('grey-plus-alpha.gif'), // http://i.imgur.com/gZ5jlmE.gif
   inputSvg: getPath('check.svg'), // http://dev.w3.org/SVG/tools/svgweb/samples/svg-files/check.svg
@@ -102,6 +103,7 @@ module.exports = {
   outputPng: getPath('output.png'),
   outputWebP: getPath('output.webp'),
   outputV: getPath('output.v'),
+  outputTiff: getPath('output.tiff'),
   outputZoinks: getPath('output.zoinks'), // an 'unknown' file extension
 
   // Path for tests requiring human inspection

test/unit/crop.js

@@ -191,6 +191,22 @@ describe('Crop', function () {
           fixtures.assertSimilar(fixtures.expected('crop-strategy.png'), data, done);
         });
     });
+
+    it('supports the strategy passed as a string', function (done) {
+      sharp(fixtures.inputPngWithTransparency)
+        .resize(320, 80)
+        .crop('entropy')
+        .toBuffer(function (err, data, info) {
+          if (err) throw err;
+          assert.strictEqual('png', info.format);
+          assert.strictEqual(4, info.channels);
+          assert.strictEqual(320, info.width);
+          assert.strictEqual(80, info.height);
+          assert.strictEqual(0, info.cropCalcLeft);
+          assert.strictEqual(80, info.cropCalcTop);
+          fixtures.assertSimilar(fixtures.expected('crop-strategy.png'), data, done);
+        });
+    });
   });
 
   describe('Attention strategy', function () {
@@ -225,5 +241,21 @@ describe('Crop', function () {
           fixtures.assertSimilar(fixtures.expected('crop-strategy.png'), data, done);
         });
     });
+
+    it('supports the strategy passed as a string', function (done) {
+      sharp(fixtures.inputPngWithTransparency)
+        .resize(320, 80)
+        .crop('attention')
+        .toBuffer(function (err, data, info) {
+          if (err) throw err;
+          assert.strictEqual('png', info.format);
+          assert.strictEqual(4, info.channels);
+          assert.strictEqual(320, info.width);
+          assert.strictEqual(80, info.height);
+          assert.strictEqual(0, info.cropCalcLeft);
+          assert.strictEqual(80, info.cropCalcTop);
+          fixtures.assertSimilar(fixtures.expected('crop-strategy.png'), data, done);
+        });
+    });
   });
 });

test/unit/interpolation.js

@@ -8,6 +8,7 @@ const fixtures = require('../fixtures');
 describe('Interpolators and kernels', function () {
   describe('Reducers', function () {
     [
+      sharp.kernel.nearest,
       sharp.kernel.cubic,
       sharp.kernel.lanczos2,
       sharp.kernel.lanczos3

test/unit/io.js

@@ -77,16 +77,58 @@ describe('Input/output', function () {
     readable.pipe(pipeline);
   });
 
-  it('Read from Stream and write to Buffer via Promise', function (done) {
-    const readable = fs.createReadStream(fixtures.inputJpg);
+  it('Read from Stream and write to Buffer via Promise resolved with Buffer', function () {
     const pipeline = sharp().resize(1, 1);
-    pipeline.toBuffer().then(function (data) {
-      assert.strictEqual(true, data.length > 0);
-      done();
-    }).catch(function (err) {
-      throw err;
-    });
-    readable.pipe(pipeline);
+    fs.createReadStream(fixtures.inputJpg).pipe(pipeline);
+    return pipeline
+      .toBuffer({resolveWithObject: false})
+      .then(function (data) {
+        assert.strictEqual(true, data instanceof Buffer);
+        assert.strictEqual(true, data.length > 0);
+      });
+  });
+
+  it('Read from Stream and write to Buffer via Promise resolved with Object', function () {
+    const pipeline = sharp().resize(1, 1);
+    fs.createReadStream(fixtures.inputJpg).pipe(pipeline);
+    return pipeline
+      .toBuffer({resolveWithObject: true})
+      .then(function (object) {
+        assert.strictEqual('object', typeof object);
+        assert.strictEqual('object', typeof object.info);
+        assert.strictEqual('jpeg', object.info.format);
+        assert.strictEqual(1, object.info.width);
+        assert.strictEqual(1, object.info.height);
+        assert.strictEqual(3, object.info.channels);
+        assert.strictEqual(true, object.data instanceof Buffer);
+        assert.strictEqual(true, object.data.length > 0);
+      });
+  });
+
+  it('Read from File and write to Buffer via Promise resolved with Buffer', function () {
+    return sharp(fixtures.inputJpg)
+      .resize(1, 1)
+      .toBuffer({resolveWithObject: false})
+      .then(function (data) {
+        assert.strictEqual(true, data instanceof Buffer);
+        assert.strictEqual(true, data.length > 0);
+      });
+  });
+
+  it('Read from File and write to Buffer via Promise resolved with Object', function () {
+    return sharp(fixtures.inputJpg)
+      .resize(1, 1)
+      .toBuffer({resolveWithObject: true})
+      .then(function (object) {
+        assert.strictEqual('object', typeof object);
+        assert.strictEqual('object', typeof object.info);
+        assert.strictEqual('jpeg', object.info.format);
+        assert.strictEqual(1, object.info.width);
+        assert.strictEqual(1, object.info.height);
+        assert.strictEqual(3, object.info.channels);
+        assert.strictEqual(true, object.data instanceof Buffer);
+        assert.strictEqual(true, object.data.length > 0);
+      });
   });
 
   it('Read from Stream and write to Stream', function (done) {
@@ -819,6 +861,134 @@ describe('Input/output', function () {
     });
   });
 
+  it('TIFF lzw compression with horizontal predictor shrinks test file', function (done) {
+    const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
+    sharp(fixtures.inputTiffUncompressed)
+      .tiff({
+        compression: 'lzw',
+        predictor: 'horizontal'
+      })
+      .toFile(fixtures.outputTiff, (err, info) => {
+        if (err) throw err;
+        assert.strictEqual('tiff', info.format);
+        assert(info.size < startSize);
+        fs.unlink(fixtures.outputTiff, done);
+      });
+  });
+
+  it('TIFF deflate compression with hoizontal predictor shrinks test file', function (done) {
+    const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
+    sharp(fixtures.inputTiffUncompressed)
+      .tiff({
+        compression: 'deflate',
+        predictor: 'horizontal'
+      })
+      .toFile(fixtures.outputTiff, (err, info) => {
+        if (err) throw err;
+        assert.strictEqual('tiff', info.format);
+        assert(info.size < startSize);
+        fs.unlink(fixtures.outputTiff, done);
+      });
+  });
+
+  it('TIFF deflate compression with float predictor shrinks test file', function (done) {
+    const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
+    sharp(fixtures.inputTiffUncompressed)
+      .tiff({
+        compression: 'deflate',
+        predictor: 'float'
+      })
+      .toFile(fixtures.outputTiff, (err, info) => {
+        if (err) throw err;
+        assert.strictEqual('tiff', info.format);
+        assert(info.size < startSize);
+        fs.unlink(fixtures.outputTiff, done);
+      });
+  });
+
+  it('TIFF deflate compression without predictor shrinks test file', function (done) {
+    const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
+    sharp(fixtures.inputTiffUncompressed)
+      .tiff({
+        compression: 'deflate',
+        predictor: 'none'
+      })
+      .toFile(fixtures.outputTiff, (err, info) => {
+        if (err) throw err;
+        assert.strictEqual('tiff', info.format);
+        assert(info.size < startSize);
+        fs.unlink(fixtures.outputTiff, done);
+      });
+  });
+
+  it('TIFF jpeg compression shrinks test file', function (done) {
+    const startSize = fs.statSync(fixtures.inputTiffUncompressed).size;
+    sharp(fixtures.inputTiffUncompressed)
+      .tiff({
+        compression: 'jpeg'
+      })
+      .toFile(fixtures.outputTiff, (err, info) => {
+        if (err) throw err;
+        assert.strictEqual('tiff', info.format);
+        assert(info.size < startSize);
+        fs.unlink(fixtures.outputTiff, done);
+      });
+  });
+
+  it('TIFF none compression does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ compression: 'none' });
+    });
+  });
+
+  it('TIFF lzw compression does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ compression: 'lzw' });
+    });
+  });
+
+  it('TIFF deflate compression does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ compression: 'deflate' });
+    });
+  });
+
+  it('TIFF invalid compression option throws', function () {
+    assert.throws(function () {
+      sharp().tiff({ compression: 0 });
+    });
+  });
+
+  it('TIFF invalid compression option throws', function () {
+    assert.throws(function () {
+      sharp().tiff({ compression: 'a' });
+    });
+  });
+
+  it('TIFF invalid predictor option throws', function () {
+    assert.throws(function () {
+      sharp().tiff({ predictor: 'a' });
+    });
+  });
+
+  it('TIFF horizontal predictor does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ predictor: 'horizontal' });
+    });
+  });
+
+  it('TIFF float predictor does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ predictor: 'float' });
+    });
+  });
+
+  it('TIFF none predictor does not throw error', function () {
+    assert.doesNotThrow(function () {
+      sharp().tiff({ predictor: 'none' });
+    });
+  });
+
   it('Input and output formats match when not forcing', function (done) {
     sharp(fixtures.inputJpg)
       .resize(320, 240)
@@ -1002,7 +1172,7 @@ describe('Input/output', function () {
       sharp(fixtures.inputJpg).metadata(function (err, metadata) {
         if (err) throw err;
         sharp(fixtures.inputJpg)
-          .limitInputPixels(metadata.width * metadata.height - 1)
+          .limitInputPixels((metadata.width * metadata.height) - 1)
           .toBuffer(function (err) {
             assert.strictEqual(true, !!err);
             done();
@@ -1114,6 +1284,66 @@ describe('Input/output', function () {
     });
   });
 
+  describe('create new image', function () {
+    it('RGB', function (done) {
+      const create = {
+        width: 10,
+        height: 20,
+        channels: 3,
+        background: { r: 0, g: 255, b: 0 }
+      };
+      sharp(null, { create: create })
+        .jpeg()
+        .toBuffer(function (err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(create.width, info.width);
+          assert.strictEqual(create.height, info.height);
+          assert.strictEqual(create.channels, info.channels);
+          assert.strictEqual('jpeg', info.format);
+          fixtures.assertSimilar(fixtures.expected('create-rgb.jpg'), data, done);
+        });
+    });
+    it('RGBA', function (done) {
+      const create = {
+        width: 20,
+        height: 10,
+        channels: 4,
+        background: { r: 255, g: 0, b: 0, alpha: 128 }
+      };
+      sharp(null, { create: create })
+        .png()
+        .toBuffer(function (err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(create.width, info.width);
+          assert.strictEqual(create.height, info.height);
+          assert.strictEqual(create.channels, info.channels);
+          assert.strictEqual('png', info.format);
+          fixtures.assertSimilar(fixtures.expected('create-rgba.png'), data, done);
+        });
+    });
+    it('Invalid channels', function () {
+      const create = {
+        width: 10,
+        height: 20,
+        channels: 2,
+        background: { r: 0, g: 0, b: 0 }
+      };
+      assert.throws(function () {
+        sharp(null, { create: create });
+      });
+    });
+    it('Missing background', function () {
+      const create = {
+        width: 10,
+        height: 20,
+        channels: 3
+      };
+      assert.throws(function () {
+        sharp(null, { create: create });
+      });
+    });
+  });
+
   it('Queue length change events', function (done) {
     let eventCounter = 0;
     const queueListener = function (queueLength) {

test/unit/tile.js

@@ -187,7 +187,7 @@ describe('Tile', function () {
           assert.strictEqual(2225, info.height);
           assert.strictEqual(3, info.channels);
           assert.strictEqual('undefined', typeof info.size);
-          assertDeepZoomTiles(directory, 512 + 2 * 16, 13, done);
+          assertDeepZoomTiles(directory, 512 + (2 * 16), 13, done);
         });
     });
   });