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Merge pull request #4301 from tfelix/feat-invert-geo-mask

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Adds invertAlpha flag to GeometryMask
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Richard Davey 2019-01-23 21:52:16 +00:00 committed by GitHub
commit 87a83d4ff8
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1 changed files with 23 additions and 4 deletions
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21
src/display/mask/GeometryMask.js
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@ -36,6 +36,16 @@ var GeometryMask = new Class({
* @since 3.0.0
*/
this.geometryMask = graphicsGeometry;
/**
* Similiar to the BitmapMasks invertAlpha setting this to true will then hide all pixels
* drawn to the Geometry Mask.
*
* @name Phaser.Display.Masks.GeometryMask#invertAlpha
* @type {boolean}
* @since 3.16.0
*/
this.invertAlpha = false;
},
/**
@ -82,7 +92,16 @@ var GeometryMask = new Class({
// Use stencil buffer to affect next rendering object
gl.colorMask(true, true, true, true);
gl.stencilFunc(gl.EQUAL, 1, 1);
if (this.invertAlpha)
{
gl.stencilFunc(gl.NOTEQUAL, 1, 1);
}
else
{
gl.stencilFunc(gl.EQUAL, 1, 1);
}
gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
},