Created
January 18, 2016 16:38
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pixi.js用移動平均フィルタ
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class MovingAverageFilter extends PIXI.AbstractFilter { | |
static fragmentSrc(size: number, width: number, height: number, direction: string) { | |
return ` | |
precision lowp float; | |
varying vec2 vTextureCoord; | |
varying vec4 vColor; | |
uniform sampler2D uSampler; | |
void main(void) | |
{ | |
gl_FragColor = vec4(0.0); | |
for (int i = 0; i < ${size}; i++) { | |
float offset = float(i - ${size} / 2) / float(${(direction === 'x') ? width : height}); | |
gl_FragColor += texture2D(uSampler, vec2(vTextureCoord.s${(direction === 'x') ? ' + offset' : ''}, vTextureCoord.t${(direction === 'y') ? ' + offset' : ''})) / float(${size}); | |
} | |
} | |
`; | |
}; | |
xFilter: PIXI.AbstractFilter; | |
yFilter: PIXI.AbstractFilter; | |
constructor(size: number, width: number, height: number) { | |
super(); | |
this.xFilter = new PIXI.AbstractFilter(null, MovingAverageFilter.fragmentSrc(size, width, height, 'x')); | |
this.yFilter = new PIXI.AbstractFilter(null, MovingAverageFilter.fragmentSrc(size, width, height, 'y')); | |
} | |
applyFilter(renderer: PIXI.WebGLRenderer, input: PIXI.RenderTarget, output: PIXI.RenderTarget) { | |
const renderTarget = renderer.filterManager.getRenderTarget(true); | |
this.xFilter.applyFilter(renderer, input, renderTarget); | |
this.yFilter.applyFilter(renderer, renderTarget, output); | |
(<any>renderer.filterManager).returnRenderTarget(renderTarget); | |
} | |
} |
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