gif-encoder - npm Package Compare versions

Comparing version 0.3.0 to 0.4.0

CHANGELOG.md

		# gif-encoder changelog
		0.4.0 - Broke down `getImagePixels` into `removeAlphaChannel` and `setImagePixels`

		0.3.0 - Moved to readable-stream for streams1/streams2 functionality
		@@ -3,0 +5,0 @@

lib/GIFEncoder.js

		@@ -97,3 +97,2 @@ /*

		this.image = null; // current frame
		this.pixels = null; // BGR byte array from frame
		@@ -179,5 +178,4 @@ this.indexedPixels = null; // converted frame indexed to palette
		GIFEncoder.prototype.analyzeImage = function (imageData) {
		this.image = imageData;

		this.getImagePixels(); // convert to correct format if necessary
		// convert to correct format if necessary
		this.setImagePixels(this.removeAlphaChannel(imageData));
		this.analyzePixels(); // build color table & map pixels
		@@ -323,10 +321,7 @@ };
		*/
		// TODO: Require an input for this and make option for clone (default: true)
		// allows for optimization with trade off of mutation
		GIFEncoder.prototype.getImagePixels = function() {
		GIFEncoder.prototype.removeAlphaChannel = function (data) {
		var w = this.width;
		var h = this.height;
		this.pixels = new Uint8Array(w * h * 3);
		var pixels = new Uint8Array(w * h * 3);

		var data = this.image;
		var count = 0;
		@@ -337,24 +332,13 @@
		var b = (i * w * 4) + j * 4;
		this.pixels[count++] = data[b];
		this.pixels[count++] = data[b+1];
		this.pixels[count++] = data[b+2];
		pixels[count++] = data[b];
		pixels[count++] = data[b+1];
		pixels[count++] = data[b+2];
		}
		}

		return pixels;
		};

		GIFEncoder.prototype._pixelHack = function(data) {
		var w = this.width;
		var h = this.height;
		this.pixels = new Uint8Array(w * h * 3);

		var count = 0;

		for (var i = 0; i < h; i++) {
		for (var j = 0; j < w; j++) {
		var b = (i * w * 4) + j * 4;
		this.pixels[count++] = data.charCodeAt(b) - 33;
		this.pixels[count++] = data.charCodeAt(b+1) - 33;
		this.pixels[count++] = data.charCodeAt(b+2) - 33;
		}
		}
		GIFEncoder.prototype.setImagePixels = function(pixels) {
		this.pixels = pixels;
		};
		@@ -361,0 +345,0 @@

package.json

		{
		"name": "gif-encoder",
		"description": "Streaming GIF encoder",
		"version": "0.3.0",
		"version": "0.4.0",
		"homepage": "https://github.com/twolfson/gif-encoder",
		@@ -6,0 +6,0 @@ "author": {

README.md

		@@ -192,3 +192,3 @@ # gif-encoder [![Build status](https://travis-ci.org/twolfson/gif-encoder.png?branch=master)](https://travis-ci.org/twolfson/gif-encoder)
		#### `analyzeImage(imageData)`
		First part of `addFrame`; saves `imageData` to `this.image`, runs `getImagePixels()`, and runs `analyzePixels()`.
		First part of `addFrame`; runs `setImagePixels(removeAlphaChannel(imageData))` and runs `analyzePixels()`.

		@@ -199,5 +199,13 @@ - imageData `Array` - Same as that in [`addFrame`][]

		#### `getImagePixels()`
		Clones `this.image` into `image.pixels` as a `Uint8Array`. Totally unnecessary and non-performant method which is soon to be deprecated.
		#### `removeAlphaChannel(imageData)`
		Reduces `imageData` into a `Uint8Array` of length `3 * width * height` containing sequences of `r, g, b`; removing the alpha channel.

		- imageData `Array` - Same as that in [`addFrame`][]; array containing `r, g, b, a` sequences.

		#### `setImagePixels(pixels)`
		Save `pixels` as `this.pixels` for image analysis.

		- pixels `Array` - Same as `imageData` from [`addFrame`][]
		- `GifEncoder` will mutate the original data.

		#### `writeImageInfo()`
		@@ -211,13 +219,2 @@ Second part of `addFrame`; behavior varies on if it is the first frame or following frame.

		#### `setImagePixels(pixels, [options])`
		`// TODO: Make this method.`

		This method has not yet been written but will be the one to deprecate `getImagePixels`.

		- pixels `Array` - Same as `imageData` from [`addFrame`][]
		- options `Object` - Optional container for flags to alter behavior
		- clone `Boolean` - If true (default), clone `pixels` into a `Uint8Array`. If false, save `pixels` directly as `this.pixels`
		- `GifEncoder` will mutate the original data.


		## Donating
		@@ -224,0 +221,0 @@ Support this project and [others by twolfson][gittip] via [gittip][].

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