Testing CanvasPool.

build/config.php

@@ -56,6 +56,7 @@
 
     <script src="$path/src/pixi/utils/Utils.js"></script>
     <script src="$path/src/pixi/utils/Polyk.js"></script>
+    <script src="$path/src/pixi/utils/CanvasPool.js"></script>
 
     <script src="$path/src/pixi/renderers/webgl/utils/WebGLShaderUtils.js"></script>
     <script src="$path/src/pixi/renderers/webgl/shaders/PixiShader.js"></script>
@@ -73,6 +74,7 @@
     <script src="$path/src/pixi/renderers/webgl/utils/WebGLFastSpriteBatch.js"></script>
     <script src="$path/src/pixi/renderers/webgl/utils/WebGLFilterManager.js"></script>
     <script src="$path/src/pixi/renderers/webgl/utils/FilterTexture.js"></script>
+
     <script src="$path/src/pixi/renderers/canvas/utils/CanvasBuffer.js"></script>
     <script src="$path/src/pixi/renderers/canvas/utils/CanvasMaskManager.js"></script>
     <script src="$path/src/pixi/renderers/canvas/utils/CanvasTinter.js"></script>

src/gameobjects/Text.js

@@ -73,7 +73,7 @@ Phaser.Text = function (game, x, y, text, style) {
     /**
      * @property {HTMLCanvasElement} canvas - The canvas element that the text is rendered.
      */
-    this.canvas = document.createElement('canvas');
+    this.canvas = PIXI.CanvasPool.create(this);
 
     /**
      * @property {HTMLCanvasElement} context - The context of the canvas element that the text is rendered to.
@@ -201,15 +201,17 @@ Phaser.Text.prototype.destroy = function (destroyChildren) {
 
     this.texture.destroy(true);
 
-    if (this.canvas && this.canvas.parentNode)
-    {
-        this.canvas.parentNode.removeChild(this.canvas);
-    }
-    else
-    {
-        this.canvas = null;
-        this.context = null;
-    }
+    PIXI.CanvasPool.remove(this);
+
+    // if (this.canvas && this.canvas.parentNode)
+    // {
+    //     this.canvas.parentNode.removeChild(this.canvas);
+    // }
+    // else
+    // {
+    //     this.canvas = null;
+    //     this.context = null;
+    // }
 
     Phaser.Component.Destroy.prototype.destroy.call(this, destroyChildren);
 
@@ -1973,5 +1975,5 @@ Object.defineProperty(Phaser.Text.prototype, 'height', {
 
 Phaser.Text.fontPropertiesCache = {};
 
-Phaser.Text.fontPropertiesCanvas = document.createElement('canvas');
+Phaser.Text.fontPropertiesCanvas = PIXI.CanvasPool.create(Phaser.Text.fontPropertiesCanvas);
 Phaser.Text.fontPropertiesContext = Phaser.Text.fontPropertiesCanvas.getContext('2d');

src/input/Input.js

@@ -406,9 +406,7 @@ Phaser.Input.prototype = {
 
         this.activePointer = this.mousePointer;
 
-        this.hitCanvas = document.createElement('canvas');
-        this.hitCanvas.width = 1;
-        this.hitCanvas.height = 1;
+        this.hitCanvas = PIXI.CanvasPool.create(this, 1, 1);
         this.hitContext = this.hitCanvas.getContext('2d');
 
         this.mouse.start();
@@ -454,6 +452,8 @@ Phaser.Input.prototype = {
 
         this.moveCallbacks = [];
 
+        PIXI.CanvasPool.remove(this);
+
         this.game.canvas.removeEventListener('click', this._onClickTrampoline);
 
     },

src/pixi/extras/TilingSprite.js

@@ -497,6 +497,8 @@ PIXI.TilingSprite.prototype.getBounds = function()
 
 PIXI.TilingSprite.prototype.destroy = function () {
 
+    this.canvasBuffer.destroy();
+
     PIXI.Sprite.prototype.destroy.call(this);
 
     this.tileScale = null;

src/pixi/renderers/canvas/CanvasRenderer.js

@@ -107,7 +107,7 @@ PIXI.CanvasRenderer = function(width, height, options)
      * @property view
      * @type HTMLCanvasElement
      */
-    this.view = options.view || document.createElement( "canvas" );
+    this.view = options.view || PIXI.CanvasPool.create(this, this.width, this.height);
 
     /**
      * The canvas 2d context that everything is drawn with

src/pixi/renderers/canvas/utils/CanvasBuffer.js

@@ -34,7 +34,7 @@ PIXI.CanvasBuffer = function(width, height)
      * @property canvas
      * @type HTMLCanvasElement
      */
-    this.canvas = document.createElement("canvas");
+    this.canvas = PIXI.CanvasPool.create(this, this.width, this.height);
 
     /**
      * A CanvasRenderingContext2D object representing a two-dimensional rendering context.
@@ -74,3 +74,13 @@ PIXI.CanvasBuffer.prototype.resize = function(width, height)
     this.width = this.canvas.width = width;
     this.height = this.canvas.height = height;
 };
+
+/**
+ * Frees the canvas up for use again.
+ *
+ * @method destroy
+ */
+PIXI.CanvasBuffer.prototype.destroy = function()
+{
+    PIXI.CanvasPool.remove(this);
+};

src/pixi/renderers/canvas/utils/CanvasTinter.js

@@ -21,7 +21,7 @@ PIXI.CanvasTinter = function() {};
  */
 PIXI.CanvasTinter.getTintedTexture = function(sprite, color)
 {
-    var canvas = sprite.tintedTexture || document.createElement("canvas");
+    var canvas = sprite.tintedTexture || PIXI.CanvasPool.create(this);
     
     PIXI.CanvasTinter.tintMethod(sprite.texture, color, canvas);
 

src/pixi/renderers/webgl/WebGLRenderer.js

@@ -119,7 +119,7 @@ PIXI.WebGLRenderer = function(width, height, options)
      * @property view
      * @type HTMLCanvasElement
      */
-    this.view = options.view || document.createElement('canvas');
+    this.view = options.view || PIXI.CanvasPool.create(this, this.width, this.height);
 
     /**
      * @property _contextOptions
@@ -445,6 +445,8 @@ PIXI.WebGLRenderer.prototype.destroy = function()
     this.gl = null;
     this.renderSession = null;
 
+    PIXI.CanvasPool.remove(this);
+
     PIXI.instances[this.glContextId] = null;
 
     PIXI.WebGLRenderer.glContextId--;

src/pixi/textures/BaseTexture.js

@@ -171,6 +171,8 @@ PIXI.BaseTexture.prototype.destroy = function()
     }
     else if (this.source && this.source._pixiId)
     {
+        PIXI.CanvasPool.removeByCanvas(this.source);
+
         delete PIXI.BaseTextureCache[this.source._pixiId];
     }
 
@@ -254,7 +256,7 @@ PIXI.BaseTexture.fromImage = function(imageUrl, crossorigin, scaleMode)
     {
         // new Image() breaks tex loading in some versions of Chrome.
         // See https://code.google.com/p/chromium/issues/detail?id=238071
-        var image = new Image();//document.createElement('img');
+        var image = new Image();
 
         if (crossorigin)
         {

src/pixi/textures/Texture.js

@@ -305,7 +305,6 @@ PIXI.Texture.fromCanvas = function(canvas, scaleMode)
     var baseTexture = PIXI.BaseTexture.fromCanvas(canvas, scaleMode);
 
     return new PIXI.Texture(baseTexture);
-
 };
 
 /**

src/pixi/utils/CanvasPool.js

@@ -0,0 +1,145 @@
+/**
+* @author       Richard Davey <rich@photonstorm.com>
+* @copyright    2015 Photon Storm Ltd.
+* @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
+*/
+
+/**
+* 
+*
+* @class PIXI.CanvasPool
+* @static
+*/
+PIXI.CanvasPool = {
+
+    /**
+    * 
+    * 
+    * @method PIXI.CanvasPool.create
+    * @static
+    * @param {any} parent - The parent of the canvas element.
+    * @param {number} width - The width of the canvas element.
+    * @param {number} height - The height of the canvas element.
+    * @return {HTMLCanvasElement} The canvas element.
+    */
+    create: function (parent, width, height) {
+
+        var idx = PIXI.CanvasPool.getFirst();
+        var canvas;
+
+        if (idx === -1)
+        {
+            var container = {
+                parent: parent,
+                canvas: document.createElement("canvas")
+            }
+
+            PIXI.CanvasPool.pool.push(container);
+
+            canvas = container.canvas;
+
+            console.log('CanvasPool created', PIXI.CanvasPool.pool.length);
+        }
+        else
+        {
+            PIXI.CanvasPool.pool[idx].parent = parent;
+
+            canvas = PIXI.CanvasPool.pool[idx].canvas;
+
+            console.log('CanvasPool recycled', idx);
+        }
+
+        if (width !== undefined)
+        {
+            canvas.width = width;
+            canvas.height = height;
+            canvas.clearRect(0, 0, width, height);
+        }
+
+        return canvas;
+
+    },
+
+    getFirst: function () {
+
+        var pool = PIXI.CanvasPool.pool;
+
+        for (var i = 0; i < pool.length; i++)
+        {
+            if (pool[i].parent === null)
+            {
+                return i;
+            }
+        }
+
+        return -1;
+
+    },
+
+    remove: function (parent) {
+
+        var pool = PIXI.CanvasPool.pool;
+
+        for (var i = 0; i < pool.length; i++)
+        {
+            if (pool[i].parent === parent)
+            {
+                pool[i].parent = null;
+
+                console.log('CanvasPool removed', i);
+            }
+        }
+
+    },
+
+    removeByCanvas: function (canvas) {
+
+        var pool = PIXI.CanvasPool.pool;
+
+        for (var i = 0; i < pool.length; i++)
+        {
+            if (pool[i].canvas === canvas)
+            {
+                pool[i].parent = null;
+            }
+        }
+
+    },
+
+    getTotal: function () {
+
+        var pool = PIXI.CanvasPool.pool;
+        var c = 0;
+
+        for (var i = 0; i < pool.length; i++)
+        {
+            if (pool[i].parent !== null)
+            {
+                c++;
+            }
+        }
+
+        return c;
+
+    },
+
+    getFree: function () {
+
+        var pool = PIXI.CanvasPool.pool;
+        var c = 0;
+
+        for (var i = 0; i < pool.length; i++)
+        {
+            if (pool[i].parent === null)
+            {
+                c++;
+            }
+        }
+
+        return c;
+
+    }
+
+};
+
+PIXI.CanvasPool.pool = [];

src/pixi/utils/Utils.js

@@ -41,9 +41,7 @@ PIXI.canUseNewCanvasBlendModes = function()
     var yellow = new Image();
     yellow.src = pngHead + '/wCKxvRF' + pngEnd;
 
-    var canvas = document.createElement('canvas');
-    canvas.width = 6;
-    canvas.height = 1;
+    var canvas = PIXI.CanvasPool.create(this, 6, 1);
     var context = canvas.getContext('2d');
     context.globalCompositeOperation = 'multiply';
     context.drawImage(magenta, 0, 0);
@@ -56,7 +54,10 @@ PIXI.canUseNewCanvasBlendModes = function()
 
     var data = context.getImageData(2,0,1,1).data;
 
+    PIXI.CanvasPool.remove(this);
+
     return (data[0] === 255 && data[1] === 0 && data[2] === 0);
+
 };
 
 /**

src/system/Device.js

@@ -1130,7 +1130,7 @@ Phaser.Device._initialize = function () {
             return false;
         }
 
-        var elem = document.createElement('canvas');
+        var elem = PIXI.CanvasPool.create(this, 1, 1);
         var ctx = elem.getContext('2d');
 
         if (!ctx)
@@ -1140,6 +1140,8 @@ Phaser.Device._initialize = function () {
 
         var image = ctx.createImageData(1, 1);
 
+        PIXI.CanvasPool.remove(this);
+
         return image.data instanceof Uint8ClampedArray;
 
     }