File: src/pixi/renderers/canvas/utils/CanvasMaskManager.js
    
/**
 * @author Mat Groves
 * 
 * 
 */
PIXI.CanvasMaskManager = function()
{
    
};
PIXI.CanvasMaskManager.prototype.pushMask = function(maskData, context)
{
    context.save();
    
    //maskData.visible = false;
    // maskData.alpha = 0;
    
    var cacheAlpha = maskData.alpha;
    var transform = maskData.worldTransform;
    context.setTransform(transform[0], transform[3], transform[1], transform[4], transform[2], transform[5]);
    PIXI.CanvasGraphics.renderGraphicsMask(maskData, context);
    context.clip();
    maskData.worldAlpha = cacheAlpha;
};
PIXI.CanvasMaskManager.prototype.popMask = function(context)
{
    context.restore();
};