pixijs shader颗粒化显示贴图

const app = new PIXI.Application({ transparent: true });
document.body.appendChild(app.view); // Create background image
const background = PIXI.Sprite.from('/moban/bg_grass.jpg');
background.width = app.screen.width;
background.height = app.screen.height;
app.stage.addChild(background); // Stop application wait for load to finish
app.stop(); app.loader.add('shader', '/moban/shader.frag')
.load(onLoaded); let filter; // Handle the load completed
function onLoaded(loader, res) {
// Create the new filter, arguments: (vertexShader, framentSource)
filter = new PIXI.Filter(null, res.shader.data, {
customUniform: 0.0,
}); // === WARNING ===
// specify uniforms in filter constructor
// or set them BEFORE first use
// filter.uniforms.customUniform = 0.0 // Add the filter
background.filters = [filter]; // Resume application update
app.start();
}
var i=;
// Animate the filter
app.ticker.add((delta) => {
i-=0.03; filter.uniforms.customUniform = i;
});

precision mediump float;varying vec2 vTextureCoord;
varying vec4 vColor;uniform sampler2D uSampler;
uniform float customUniform;float r(vec2 p){return fract(cos(mod(.,.*dot(p,vec2(23.140692632779,2.6651441426902)))));}
void main(void)
{ gl_FragColor=mix(texture2D(uSampler,vTextureCoord),vec4(.,.,.,.),((min(.,.*mod(customUniform,2.5)))<=r(vTextureCoord))?.:.);}