playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
59 lines (58 loc) • 1.83 kB
JavaScript
import { ADDRESS_CLAMP_TO_EDGE, ADDRESS_REPEAT, TEXHINT_ASSET } from "../../../platform/graphics/constants.js";
import { Texture } from "../../../platform/graphics/texture.js";
import { Http } from "../../../platform/net/http.js";
import { basisTranscode } from "../../handlers/basis.js";
import { TextureParser } from "./texture.js";
class BasisParser extends TextureParser {
constructor(device) {
super();
this.device = device;
}
canParse(context) {
return context.ext === "basis";
}
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.`);
}
};
this.handler.fetch(url, Http.ResponseType.ARRAY_BUFFER, (err, result) => {
if (err) {
callback(err);
} else {
transcode(result);
}
}, asset);
}
// our async transcode call provides the neat structure we need to create the texture instance
open(url, data, device, textureOptions = {}) {
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: data.format,
cubemap: data.cubemap,
levels: data.levels,
// derive mipmaps from the actual level count, so a single-level file isn't treated as an
// incomplete mip chain (which renders black); matches the dds parser
mipmaps: data.levels.length > 1,
...textureOptions
});
texture.upload();
return texture;
}
}
export {
BasisParser
};