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File size: 1,563 Bytes
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import {
QuadMesh,
NodeMaterial,
WebGPURenderer,
CanvasTexture
} from 'three';
import { texture, uv } from 'three/tsl';
let _renderer;
const _quadMesh = /*@__PURE__*/ new QuadMesh();
export async function decompress( blitTexture, maxTextureSize = Infinity, renderer = null ) {
if ( renderer === null ) {
renderer = _renderer = new WebGPURenderer();
await renderer.init();
}
const material = new NodeMaterial();
material.fragmentNode = texture( blitTexture, uv().flipY() );
const width = Math.min( blitTexture.image.width, maxTextureSize );
const height = Math.min( blitTexture.image.height, maxTextureSize );
const currentOutputColorSpace = renderer.outputColorSpace;
renderer.setSize( width, height );
renderer.outputColorSpace = blitTexture.colorSpace;
_quadMesh.material = material;
_quadMesh.render( renderer );
renderer.outputColorSpace = currentOutputColorSpace;
const canvas = document.createElement( 'canvas' );
const context = canvas.getContext( '2d' );
canvas.width = width;
canvas.height = height;
context.drawImage( renderer.domElement, 0, 0, width, height );
const readableTexture = new CanvasTexture( canvas );
readableTexture.minFilter = blitTexture.minFilter;
readableTexture.magFilter = blitTexture.magFilter;
readableTexture.wrapS = blitTexture.wrapS;
readableTexture.wrapT = blitTexture.wrapT;
readableTexture.colorSpace = blitTexture.colorSpace;
readableTexture.name = blitTexture.name;
if ( _renderer !== null ) {
_renderer.dispose();
_renderer = null;
}
return readableTexture;
}
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