Added glLastUsed property to TextureSource.

Author: photonstorm

src/renderer/webgl/BatchManager.js

@@ -378,6 +378,8 @@ Phaser.Renderer.WebGL.BatchManager.prototype = {
 
         var source = gameObject.frame.source;
 
+        source.glLastUsed = this.renderer.startTime;
+
         //  Does this Game Objects texture need updating?
         if (source.glDirty)
         {

src/renderer/webgl/WebGLRenderer.js

@@ -168,9 +168,12 @@ Phaser.Renderer.WebGL = function (game)
 
     this.blendModes = [];
 
-    this.drawCount = 0;
     this.flipY = 1;
 
+    this.startTime = 0;
+    this.endTime = 0;
+    this.drawCount = 0;
+
     this.contextLost = false;
 
     this._fbErrors = {
@@ -397,6 +400,8 @@ Phaser.Renderer.WebGL.prototype = {
 
         //  Add Pre-render hook
 
+        this.startTime = Date.now();
+
         var gl = this.gl;
 
         gl.viewport(0, 0, this.width, this.height);
@@ -460,6 +465,8 @@ Phaser.Renderer.WebGL.prototype = {
 
         // debugger;
 
+        this.endTime = Date.now();
+
         //  Add Post-render hook
     },
 

src/textures/TextureSource.js

@@ -101,6 +101,14 @@ Phaser.TextureSource = function (texture, source)
     */
     this.glTextureIndex = 0;
 
+    /**
+    * The timestamp when this texture was last used by the WebGL renderer.
+    * Can be used to purge out 'dead' textures from GPU memory.
+    * @property glLastUsed
+    * @type Number
+    */
+    this.glLastUsed = 0;
+
     /**
     * @property glDirty
     */