playcanvas/build/playcanvas/src/framework/parsers/texture/basis.js

PlayCanvas WebGL game engine

import { pixelFormatLinearToGamma, ADDRESS_CLAMP_TO_EDGE, ADDRESS_REPEAT } from '../../../platform/graphics/constants.js';
import { Texture } from '../../../platform/graphics/texture.js';
import { Asset } from '../../asset/asset.js';
import { basisTranscode } from '../../handlers/basis.js';
import { TextureParser } from './texture.js';

class BasisParser extends TextureParser {
		constructor(registry, device){
				super();
				this.device = device;
				this.maxRetries = 0;
		}
		load(url, callback, asset) {
				const device = this.device;
				const transcode = (data)=>{
						const basisModuleFound = basisTranscode(device, url.load, data, callback, {
								isGGGR: (asset?.file?.variants?.basis?.opt & 8) !== 0
						});
						if (!basisModuleFound) {
								callback(`Basis module not found. Asset [${asset.name}](${asset.getFileUrl()}) basis texture variant will not be loaded.`);
						}
				};
				Asset.fetchArrayBuffer(url.load, (err, result)=>{
						if (err) {
								callback(err);
						} else {
								transcode(result);
						}
				}, asset, this.maxRetries);
		}
		open(url, data, device, textureOptions = {}) {
				const format = textureOptions.srgb ? pixelFormatLinearToGamma(data.format) : data.format;
				const texture = new Texture(device, {
						name: url,
						addressU: data.cubemap ? ADDRESS_CLAMP_TO_EDGE : ADDRESS_REPEAT,
						addressV: data.cubemap ? ADDRESS_CLAMP_TO_EDGE : ADDRESS_REPEAT,
						width: data.width,
						height: data.height,
						format: format,
						cubemap: data.cubemap,
						levels: data.levels,
						...textureOptions
				});
				texture.upload();
				return texture;
		}
}

export { BasisParser };