source: Dev/trunk/src/client/dojox/gfx/canvasext.js

define([
        "./_base",
        "./canvas"],
        function(gfx, canvas){

        /*=====
         return {
                // summary:
                //              A module that adds canvas-specific features to the gfx api. You should require this module
                //              when your application specifically targets the HTML5 Canvas renderer.
         }
         =====*/
        
        var ext = gfx.canvasext = {};
        
        canvas.Surface.extend({
                
                getImageData: function(rect){
                        // summary:
                        //              Returns the canvas pixel buffer.
                        // rect: dojox/gfx.Rectangle
                        //              The canvas area.
                        
                        // flush pending renders queue, if any
                        if("pendingRender" in this){
                                this._render(true); // force render even if there're pendingImages
                        }
                        return this.rawNode.getContext("2d").getImageData(rect.x, rect.y, rect.width, rect.height);                             
                },
                
                getContext: function(){
                        // summary:
                        //              Returns the surface CanvasRenderingContext2D.
                        return this.rawNode.getContext("2d");
                }
        });             

        return ext;
});