playcanvas/build/playcanvas.dbg/src/platform/graphics/built-in-textures.js

PlayCanvas WebGL game engine

import { Debug } from '../../core/debug.js';
import { PIXELFORMAT_RGBA8 } from './constants.js';
import { DeviceCache } from './device-cache.js';
import { Texture } from './texture.js';

const textureData = {
    white: [
        255,
        255,
        255,
        255
    ],
    gray: [
        128,
        128,
        128,
        255
    ],
    black: [
        0,
        0,
        0,
        255
    ],
    normal: [
        128,
        128,
        255,
        255
    ],
    pink: [
        255,
        128,
        255,
        255
    ]
};
// class used to hold LUT textures in the device cache
class BuiltInTextures {
    destroy() {
        this.map.forEach((texture)=>{
            texture.destroy();
        });
    }
    constructor(){
        /** @type Map<string, Texture> */ this.map = new Map();
    }
}
// device cache storing built-in textures, taking care of their removal when the device is destroyed
const deviceCache = new DeviceCache();
const getBuiltInTexture = (device, name)=>{
    const cache = deviceCache.get(device, ()=>{
        return new BuiltInTextures();
    });
    if (!cache.map.has(name)) {
        const texture = new Texture(device, {
            name: `built-in-texture-${name}`,
            width: 1,
            height: 1,
            format: PIXELFORMAT_RGBA8
        });
        const pixels = texture.lock();
        const data = textureData[name];
        Debug.assert(data, `Data for built-in texture '${name}' not found`);
        pixels.set(data);
        texture.unlock();
        cache.map.set(name, texture);
    }
    return cache.map.get(name);
};

export { getBuiltInTexture };