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<!DOCTYPE html>
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<title>Phaser Source: gameobjects/BitmapData.js</title>
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<h1 class="page-title">Source: gameobjects/BitmapData.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* Creates a new BitmapData object.
*
* @class Phaser.BitmapData
*
* @classdesc A BitmapData object contains a Canvas element to which you can draw anything you like via normal Canvas context operations.
* A single BitmapData can be used as the texture one or many Images/Sprites. So if you need to dynamically create a Sprite texture then they are a good choice.
*
* @constructor
* @param {Phaser.Game} game - A reference to the currently running game.
* @param {string} key - Internal Phaser reference key for the render texture.
* @param {number} [width=100] - The width of the BitmapData in pixels.
* @param {number} [height=100] - The height of the BitmapData in pixels.
*/
Phaser.BitmapData = function (game, key, width, height) {
if (typeof width === 'undefined') { width = 100; }
if (typeof height === 'undefined') { height = 100; }
/**
* @property {Phaser.Game} game - A reference to the currently running game.
*/
this.game = game;
/**
* @property {string} key - The key of the BitmapData in the Cache, if stored there.
*/
this.key = key;
/**
* @property {number} width - The width of the BitmapData in pixels.
*/
this.width = width;
/**
* @property {number} height - The height of the BitmapData in pixels.
*/
this.height = height;
/**
* @property {HTMLCanvasElement} canvas - The canvas to which this BitmapData draws.
* @default
*/
this.canvas = Phaser.Canvas.create(width, height, '', true);
/**
* @property {CanvasRenderingContext2D} context - The 2d context of the canvas.
* @default
*/
this.context = this.canvas.getContext('2d');
/**
* @property {CanvasRenderingContext2D} ctx - A reference to BitmapData.context.
*/
this.ctx = this.context;
/**
* @property {ImageData} imageData - The context image data.
*/
this.imageData = this.context.getImageData(0, 0, width, height);
/**
* @property {Uint8ClampedArray} data - A Uint8ClampedArray view into BitmapData.buffer.
*/
this.data = this.imageData.data;
/**
* @property {Uint32Array} pixels - An Uint32Array view into BitmapData.buffer.
*/
this.pixels = null;
/**
* @property {ArrayBuffer} buffer - An ArrayBuffer the same size as the context ImageData.
*/
if (this.imageData.data.buffer)
{
this.buffer = this.imageData.data.buffer;
this.pixels = new Uint32Array(this.buffer);
}
else
{
if (window['ArrayBuffer'])
{
this.buffer = new ArrayBuffer(this.imageData.data.length);
this.pixels = new Uint32Array(this.buffer);
}
else
{
this.pixels = this.imageData.data;
}
}
/**
* @property {PIXI.BaseTexture} baseTexture - The PIXI.BaseTexture.
* @default
*/
this.baseTexture = new PIXI.BaseTexture(this.canvas);
/**
* @property {PIXI.Texture} texture - The PIXI.Texture.
* @default
*/
this.texture = new PIXI.Texture(this.baseTexture);
/**
* @property {Phaser.Frame} textureFrame - The Frame this BitmapData uses for rendering.
* @default
*/
this.textureFrame = new Phaser.Frame(0, 0, 0, width, height, 'bitmapData', game.rnd.uuid());
this.texture.frame = this.textureFrame;
/**
* @property {number} type - The const type of this object.
* @default
*/
this.type = Phaser.BITMAPDATA;
/**
* @property {boolean} disableTextureUpload - If disableTextureUpload is true this BitmapData will never send its image data to the GPU when its dirty flag is true.
*/
this.disableTextureUpload = false;
/**
* @property {boolean} dirty - If dirty this BitmapData will be re-rendered.
*/
this.dirty = false;
// Aliases
this.cls = this.clear;
this.update = this.refreshBuffer;
/**
* @property {number} _tempR - Internal cache var.
* @private
*/
this._tempR = 0;
/**
* @property {number} _tempG - Internal cache var.
* @private
*/
this._tempG = 0;
/**
* @property {number} _tempB - Internal cache var.
* @private
*/
this._tempB = 0;
};
Phaser.BitmapData.prototype = {
/**
* Updates the given objects so that they use this BitmapData as their texture. This will replace any texture they will currently have set.
*
* @method Phaser.BitmapData#add
* @param {Phaser.Sprite|Phaser.Sprite[]|Phaser.Image|Phaser.Image[]} object - Either a single Sprite/Image or an Array of Sprites/Images.
*/
add: function (object) {
if (Array.isArray(object))
{
for (var i = 0; i < object.length; i++)
{
if (object[i]['loadTexture'])
{
object[i].loadTexture(this);
}
}
}
else
{
object.loadTexture(this);
}
},
/**
* Takes the given Game Object, resizes this BitmapData to match it and then draws it into this BitmapDatas canvas, ready for further processing.
* The source game object is not modified by this operation.
* If the source object uses a texture as part of a Texture Atlas or Sprite Sheet, only the current frame will be used for sizing and draw.
* If a string is given it will assume it's a cache key and look in Phaser.Cache for an image key matching the string.
*
* @method Phaser.BitmapData#load
* @param {Phaser.Sprite|Phaser.Image|Phaser.BitmapData|string} source - The object that will be used to populate this BitmapData.
*/
load: function (source) {
if (typeof source === 'string')
{
source = this.game.cache.getImage(source);
}
this.resize(source.width, source.height);
this.cls();
if (source instanceof Phaser.Image || source instanceof Phaser.Sprite)
{
this.drawSprite(source, 0, 0);
}
else
{
this.draw(source, 0, 0);
}
this.update();
},
/**
* Clears the BitmapData context using a clearRect.
*
* @method Phaser.BitmapData#cls
*/
/**
* Clears the BitmapData context using a clearRect.
*
* @method Phaser.BitmapData#clear
*/
clear: function () {
this.context.clearRect(0, 0, this.width, this.height);
this.dirty = true;
},
/**
* Fills the BitmapData with the given color.
*
* @method Phaser.BitmapData#fill
* @param {number} r - The red color value, between 0 and 0xFF (255).
* @param {number} g - The green color value, between 0 and 0xFF (255).
* @param {number} b - The blue color value, between 0 and 0xFF (255).
* @param {number} [a=1] - The alpha color value, between 0 and 1.
*/
fill: function (r, g, b, a) {
if (typeof a === 'undefined') { a = 1; }
this.context.fillStyle = 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';
this.context.fillRect(0, 0, this.width, this.height);
this.dirty = true;
},
/**
* Resizes the BitmapData. This changes the size of the underlying canvas and refreshes the buffer.
*
* @method Phaser.BitmapData#resize
*/
resize: function (width, height) {
if (width !== this.width || height !== this.height)
{
this.width = width;
this.height = height;
this.canvas.width = width;
this.canvas.height = height;
this.baseTexture.width = width;
this.baseTexture.height = height;
this.textureFrame.width = width;
this.textureFrame.height = height;
this.texture.width = width;
this.texture.height = height;
this.texture.crop.width = width;
this.texture.crop.height = height;
this.refreshBuffer();
this.dirty = true;
}
},
/**
* This re-creates the BitmapData.imageData from the current context.
* It then re-builds the ArrayBuffer, the data Uint8ClampedArray reference and the pixels Int32Array.
* If not given the dimensions defaults to the full size of the context.
*
* @method Phaser.BitmapData#update
* @param {number} [x=0] - The x coordinate of the top-left of the image data area to grab from.
* @param {number} [y=0] - The y coordinate of the top-left of the image data area to grab from.
* @param {number} [width] - The width of the image data area.
* @param {number} [height] - The height of the image data area.
*/
/**
* DEPRECATED: This method will be removed in Phaser 2.1. Please use BitmapData.update instead.
*
* This re-creates the BitmapData.imageData from the current context.
* It then re-builds the ArrayBuffer, the data Uint8ClampedArray reference and the pixels Int32Array.
* If not given the dimensions defaults to the full size of the context.
*
* @method Phaser.BitmapData#refreshBuffer
* @param {number} [x=0] - The x coordinate of the top-left of the image data area to grab from.
* @param {number} [y=0] - The y coordinate of the top-left of the image data area to grab from.
* @param {number} [width] - The width of the image data area.
* @param {number} [height] - The height of the image data area.
*/
refreshBuffer: function (x, y, width, height) {
if (typeof x === 'undefined') { x = 0; }
if (typeof y === 'undefined') { y = 0; }
if (typeof width === 'undefined') { width = this.width; }
if (typeof height === 'undefined') { height = this.height; }
this.imageData = this.context.getImageData(x, y, width, height);
this.data = this.imageData.data;
if (this.imageData.data.buffer)
{
this.buffer = this.imageData.data.buffer;
this.pixels = new Uint32Array(this.buffer);
}
else
{
if (window['ArrayBuffer'])
{
this.buffer = new ArrayBuffer(this.imageData.data.length);
this.pixels = new Uint32Array(this.buffer);
}
else
{
this.pixels = this.imageData.data;
}
}
},
/**
* Scans through the area specified in this BitmapData and sends a color object for every pixel to the given callback.
* The callback will be sent a color object with 6 properties: `{ r: number, g: number, b: number, a: number, color: number, rgba: string }`.
* Where r, g, b and a are integers between 0 and 255 representing the color component values for red, green, blue and alpha.
* The `color` property is an Int32 of the full color. Note the endianess of this will change per system.
* The `rgba` property is a CSS style rgba() string which can be used with context.fillStyle calls, among others.
* The callback will also be sent the pixels x and y coordinates respectively.
* The callback must return either `false`, in which case no change will be made to the pixel, or a new color object.
* If a new color object is returned the pixel will be set to the r, g, b and a color values given within it.
*
* @method Phaser.BitmapData#processPixelRGB
* @param {function} callback - The callback that will be sent each pixel color object to be processed.
* @param {object} callbackContext - The context under which the callback will be called.
* @param {number} [x=0] - The x coordinate of the top-left of the region to process from.
* @param {number} [y=0] - The y coordinate of the top-left of the region to process from.
* @param {number} [width] - The width of the region to process.
* @param {number} [height] - The height of the region to process.
*/
processPixelRGB: function (callback, callbackContext, x, y, width, height) {
if (typeof x === 'undefined') { x = 0; }
if (typeof y === 'undefined') { y = 0; }
if (typeof width === 'undefined') { width = this.width; }
if (typeof height === 'undefined') { height = this.height; }
var w = x + width;
var h = y + height;
var pixel = Phaser.Color.createColor();
var result = { r: 0, g: 0, b: 0, a: 0 };
var dirty = false;
for (var ty = y; ty < h; ty++)
{
for (var tx = x; tx < w; tx++)
{
Phaser.Color.unpackPixel(this.getPixel32(tx, ty), pixel);
result = callback.call(callbackContext, pixel, tx, ty);
if (result !== false && result !== null && result !== undefined)
{
this.setPixel32(tx, ty, result.r, result.g, result.b, result.a, false);
dirty = true;
}
}
}
if (dirty)
{
this.context.putImageData(this.imageData, 0, 0);
this.dirty = true;
}
},
/**
* Scans through the area specified in this BitmapData and sends the color for every pixel to the given callback along with its x and y coordinates.
* Whatever value the callback returns is set as the new color for that pixel, unless it returns the same color, in which case it's skipped.
* Note that the format of the color received will be different depending on if the system is big or little endian.
* It is expected that your callback will deal with endianess. If you'd rather Phaser did it then use processPixelRGB instead.
* The callback will also be sent the pixels x and y coordinates respectively.
*
* @method Phaser.BitmapData#processPixel
* @param {function} callback - The callback that will be sent each pixel color to be processed.
* @param {object} callbackContext - The context under which the callback will be called.
* @param {number} [x=0] - The x coordinate of the top-left of the region to process from.
* @param {number} [y=0] - The y coordinate of the top-left of the region to process from.
* @param {number} [width] - The width of the region to process.
* @param {number} [height] - The height of the region to process.
*/
processPixel: function (callback, callbackContext, x, y, width, height) {
if (typeof x === 'undefined') { x = 0; }
if (typeof y === 'undefined') { y = 0; }
if (typeof width === 'undefined') { width = this.width; }
if (typeof height === 'undefined') { height = this.height; }
var w = x + width;
var h = y + height;
var pixel = 0;
var result = 0;
var dirty = false;
for (var ty = y; ty < h; ty++)
{
for (var tx = x; tx < w; tx++)
{
pixel = this.getPixel32(tx, ty);
result = callback.call(callbackContext, pixel, tx, ty);
if (result !== pixel)
{
this.pixels[ty * this.width + tx] = result;
dirty = true;
}
}
}
if (dirty)
{
this.context.putImageData(this.imageData, 0, 0);
this.dirty = true;
}
},
/**
* Replaces all pixels matching one color with another. The color values are given as two sets of RGBA values.
* An optional region parameter controls if the replacement happens in just a specific area of the BitmapData or the entire thing.
*
* @method Phaser.BitmapData#replaceRGB
* @param {number} r1 - The red color value to be replaced. Between 0 and 255.
* @param {number} g1 - The green color value to be replaced. Between 0 and 255.
* @param {number} b1 - The blue color value to be replaced. Between 0 and 255.
* @param {number} a1 - The alpha color value to be replaced. Between 0 and 255.
* @param {number} r2 - The red color value that is the replacement color. Between 0 and 255.
* @param {number} g2 - The green color value that is the replacement color. Between 0 and 255.
* @param {number} b2 - The blue color value that is the replacement color. Between 0 and 255.
* @param {number} a2 - The alpha color value that is the replacement color. Between 0 and 255.
* @param {Phaser.Rectangle} [region] - The area to perform the search over. If not given it will replace over the whole BitmapData.
*/
replaceRGB: function (r1, g1, b1, a1, r2, g2, b2, a2, region) {
var sx = 0;
var sy = 0;
var w = this.width;
var h = this.height;
var source = Phaser.Color.packPixel(r1, g1, b1, a1);
if (region !== undefined && region instanceof Phaser.Rectangle)
{
sx = region.x;
sy = region.y;
w = region.width;