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<h1 class="file-heading">File: src/pixi/renderers/canvas/utils/CanvasMaskManager.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* A set of functions used to handle masking
*
* @class CanvasMaskManager
*/
PIXI.CanvasMaskManager = function()
{
};
/**
* This method adds it to the current stack of masks
*
* @method pushMask
* @param maskData the maskData that will be pushed
* @param context {CanvasRenderingContext2D} the 2d drawing method of the canvas
*/
PIXI.CanvasMaskManager.prototype.pushMask = function(maskData, renderSession)
{
var context = renderSession.context;
context.save();
var cacheAlpha = maskData.alpha;
var transform = maskData.worldTransform;
var resolution = renderSession.resolution;
context.setTransform(transform.a * resolution,
transform.b * resolution,
transform.c * resolution,
transform.d * resolution,
transform.tx * resolution,
transform.ty * resolution);
PIXI.CanvasGraphics.renderGraphicsMask(maskData, context);
context.clip();
maskData.worldAlpha = cacheAlpha;
};
/**
* Restores the current drawing context to the state it was before the mask was applied
*
* @method popMask
* @param context {CanvasRenderingContext2D} the 2d drawing method of the canvas
*/
PIXI.CanvasMaskManager.prototype.popMask = function(renderSession)
{
renderSession.context.restore();
};
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