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phaser/docs/AlphaMaskFilter.js.html
photonstorm ea19aeae5c API Docs update.
2014-12-04 11:33:42 +00:00

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<a href="PIXI.BlurXFilter.html">BlurXFilter</a>
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<a href="PIXI.BlurYFilter.html">BlurYFilter</a>
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<a href="PIXI.CanvasBuffer.html">CanvasBuffer</a>
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<a href="PIXI.CanvasGraphics.html">CanvasGraphics</a>
</li>
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<a href="PIXI.CanvasMaskManager.html">CanvasMaskManager</a>
</li>
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<a href="PIXI.CanvasRenderer.html">CanvasRenderer</a>
</li>
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<a href="PIXI.CanvasTinter.html">CanvasTinter</a>
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<a href="PIXI.Circle.html">Circle</a>
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<a href="PIXI.ColorMatrixFilter.html">ColorMatrixFilter</a>
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<a href="PIXI.ColorStepFilter.html">ColorStepFilter</a>
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<a href="PIXI.ComplexPrimitiveShader.html">ComplexPrimitiveShader</a>
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<a href="PIXI.ConvolutionFilter.html">ConvolutionFilter</a>
</li>
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<a href="PIXI.CrossHatchFilter.html">CrossHatchFilter</a>
</li>
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<a href="PIXI.DisplacementFilter.html">DisplacementFilter</a>
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<a href="PIXI.Event.html">Event</a>
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<a href="PIXI.EventTarget.html">EventTarget</a>
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<a href="PIXI.FilterBlock.html">FilterBlock</a>
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<a href="PIXI.FilterTexture.html">FilterTexture</a>
</li>
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<a href="PIXI.Graphics.html">Graphics</a>
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<a href="PIXI.GraphicsData.html">GraphicsData</a>
</li>
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<a href="PIXI.ImageLoader.html">ImageLoader</a>
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<a href="PIXI.InteractionData.html">InteractionData</a>
</li>
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<a href="PIXI.InteractionManager.html">InteractionManager</a>
</li>
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<a href="PIXI.InvertFilter.html">InvertFilter</a>
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<a href="PIXI.JsonLoader.html">JsonLoader</a>
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<a href="PIXI.MovieClip.html">MovieClip</a>
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<a href="PIXI.NoiseFilter.html">NoiseFilter</a>
</li>
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<a href="PIXI.NormalMapFilter.html">NormalMapFilter</a>
</li>
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<a href="PIXI.PixelateFilter.html">PixelateFilter</a>
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<a href="PIXI.RenderTexture.html">RenderTexture</a>
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<a href="PIXI.RGBSplitFilter.html">RGBSplitFilter</a>
</li>
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<a href="PIXI.Rope.html">Rope</a>
</li>
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<a href="PIXI.RoundedRectangle.html">RoundedRectangle</a>
</li>
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<a href="PIXI.SepiaFilter.html">SepiaFilter</a>
</li>
<li class="class-depth-1">
<a href="PIXI.SmartBlurFilter.html">SmartBlurFilter</a>
</li>
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<a href="PIXI.Spine.html">Spine</a>
</li>
<li class="class-depth-1">
<a href="PIXI.SpineLoader.html">SpineLoader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.SpineTextureLoader.html">SpineTextureLoader</a>
</li>
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<a href="PIXI.Sprite.html">Sprite</a>
</li>
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<a href="PIXI.SpriteBatch.html">SpriteBatch</a>
</li>
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<a href="PIXI.SpriteSheetLoader.html">SpriteSheetLoader</a>
</li>
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<a href="PIXI.Stage.html">Stage</a>
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<a href="PIXI.Strip.html">Strip</a>
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<a href="PIXI.StripShader.html">StripShader</a>
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<a href="PIXI.Text.html">Text</a>
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<a href="PIXI.Texture.html">Texture</a>
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<a href="PIXI.TilingSprite.html">TilingSprite</a>
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<a href="PIXI.TiltShiftFilter.html">TiltShiftFilter</a>
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<a href="PIXI.TiltShiftXFilter.html">TiltShiftXFilter</a>
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<a href="PIXI.TiltShiftYFilter.html">TiltShiftYFilter</a>
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<a href="PIXI.TwistFilter.html">TwistFilter</a>
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<a href="PIXI.WebGLBlendModeManager.html">WebGLBlendModeManager</a>
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<h1 class="page-title">Source: d:/wamp/www/phaser/src/pixi/filters/AlphaMaskFilter.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* The AlphaMaskFilter class uses the pixel values from the specified texture (called the displacement map) to perform a displacement of an object.
* You can use this filter to apply all manor of crazy warping effects
* Currently the r property of the texture is used to offset the x and the g property of the texture is used to offset the y.
*
* @class AlphaMaskFilter
* @extends AbstractFilter
* @constructor
* @param texture {Texture} The texture used for the displacement map * must be power of 2 texture at the moment
*/
PIXI.AlphaMaskFilter = function(texture)
{
PIXI.AbstractFilter.call( this );
this.passes = [this];
texture.baseTexture._powerOf2 = true;
// set the uniforms
this.uniforms = {
mask: {type: 'sampler2D', value:texture},
mapDimensions: {type: '2f', value:{x:1, y:5112}},
dimensions: {type: '4fv', value:[0,0,0,0]}
};
if(texture.baseTexture.hasLoaded)
{
this.uniforms.mask.value.x = texture.width;
this.uniforms.mask.value.y = texture.height;
}
else
{
this.boundLoadedFunction = this.onTextureLoaded.bind(this);
texture.baseTexture.on('loaded', this.boundLoadedFunction);
}
this.fragmentSrc = [
'precision mediump float;',
'varying vec2 vTextureCoord;',
'varying vec4 vColor;',
'uniform sampler2D mask;',
'uniform sampler2D uSampler;',
'uniform vec2 offset;',
'uniform vec4 dimensions;',
'uniform vec2 mapDimensions;',
'void main(void) {',
' vec2 mapCords = vTextureCoord.xy;',
' mapCords += (dimensions.zw + offset)/ dimensions.xy ;',
' mapCords.y *= -1.0;',
' mapCords.y += 1.0;',
' mapCords *= dimensions.xy / mapDimensions;',
' vec4 original = texture2D(uSampler, vTextureCoord);',
' float maskAlpha = texture2D(mask, mapCords).r;',
' original *= maskAlpha;',
//' original.rgb *= maskAlpha;',
' gl_FragColor = original;',
//' gl_FragColor = gl_FragColor;',
'}'
];
};
PIXI.AlphaMaskFilter.prototype = Object.create( PIXI.AbstractFilter.prototype );
PIXI.AlphaMaskFilter.prototype.constructor = PIXI.AlphaMaskFilter;
/**
* Sets the map dimensions uniforms when the texture becomes available.
*
* @method onTextureLoaded
*/
PIXI.AlphaMaskFilter.prototype.onTextureLoaded = function()
{
this.uniforms.mapDimensions.value.x = this.uniforms.mask.value.width;
this.uniforms.mapDimensions.value.y = this.uniforms.mask.value.height;
this.uniforms.mask.value.baseTexture.off('loaded', this.boundLoadedFunction);
};
/**
* The texture used for the displacement map. Must be power of 2 sized texture.
*
* @property map
* @type Texture
*/
Object.defineProperty(PIXI.AlphaMaskFilter.prototype, 'map', {
get: function() {
return this.uniforms.mask.value;
},
set: function(value) {
this.uniforms.mask.value = value;
}
});
</pre>
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