playcanvas/build/playcanvas.dbg/src/scene/graphics/noise-textures.js

PlayCanvas WebGL game engine

import { blueNoiseData } from '../../core/math/blue-noise.js';
import { FILTER_NEAREST, TEXTURETYPE_DEFAULT, ADDRESS_REPEAT, PIXELFORMAT_RGBA8 } from '../../platform/graphics/constants.js';
import { DeviceCache } from '../../platform/graphics/device-cache.js';
import { Texture } from '../../platform/graphics/texture.js';

var createTexture = (device, namePrefix, size, data)=>{
    var texture = new Texture(device, {
        name: "" + namePrefix + size,
        width: size,
        height: size,
        format: PIXELFORMAT_RGBA8,
        addressU: ADDRESS_REPEAT,
        addressV: ADDRESS_REPEAT,
        type: TEXTURETYPE_DEFAULT,
        magFilter: FILTER_NEAREST,
        minFilter: FILTER_NEAREST,
        anisotropy: 1,
        mipmaps: false
    });
    texture.lock().set(data);
    texture.unlock();
    return texture;
};
// device cache storing the blue noise texture for the device
var deviceCacheBlueNoise = new DeviceCache();
var getBlueNoiseTexture = (device)=>{
    return deviceCacheBlueNoise.get(device, ()=>{
        var data = blueNoiseData();
        var size = Math.sqrt(data.length / 4);
        return createTexture(device, 'BlueNoise', size, data);
    });
};

export { getBlueNoiseTexture };