KTX2BasisWriter 🚧
The experimental
KTX2BasisUniversalTextureWriterclass can encode a decoded image into a KTX2 texture.
| Loader | Characteristic |
|---|---|
| File Extension | .ktx2 |
| File Type | Binary |
| Data Format | https://github.com/KhronosGroup/KTX-Specification/blob/main/ktxspec.adoc |
| File Format | KTX2 |
| Encoder Type | Asynchronous |
| Worker Thread | No (but may run on separate native thread in browsers) |
| Streaming | No |
Usage​
import '@loaders.gl/polyfill'; // only if using under Node
import {load, encode} from '@loaders.gl/core';
import {KTX2BasisUniversalTextureWriter} from '@loaders.gl/textures';
const shannonPNG = 'shannon.png';
const image = await load(shannonPNG, ImageLoader, {image: {type: 'data'}});
const encodedData = await encode(image, KTX2BasisUniversalTextureWriter);
Data Format​
https://github.com/KhronosGroup/KTX-Specification/blob/main/ktxspec.adoc
Options​
| Option | Type | Default | Description |
|---|---|---|---|
| useSRGB | Boolean | false | If true, the input is assumed to be in sRGB space. |
| qualityLevel | Number | 10 | Sets the ETC1S encoder's quality level, which controls the file size vs. quality tradeoff. Range is [1,255] |
| encodeUASTC | Boolean | false | If true, the encoder will output a UASTC texture, otherwise a ETC1S texture. |
| mipmaps | Boolean | false | If true mipmaps will be generated from the source images |
WASM module​
The writer applies BinomialLCC basis universal encoder. The libraries are loaded during runtime from URLs: