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153 lines
3.4 KiB
153 lines
3.4 KiB
// https://wwwimages2.adobe.com/content/dam/acom/en/products/speedgrade/cc/pdfs/cube-lut-specification-1.0.pdf
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import {
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Loader,
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FileLoader,
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Vector3,
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DataTexture,
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Data3DTexture,
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UnsignedByteType,
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ClampToEdgeWrapping,
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LinearFilter,
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} from 'three';
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export class LUTCubeLoader extends Loader {
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load( url, onLoad, onProgress, onError ) {
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const loader = new FileLoader( this.manager );
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loader.setPath( this.path );
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loader.setResponseType( 'text' );
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loader.load( url, text => {
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try {
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onLoad( this.parse( text ) );
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} catch ( e ) {
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if ( onError ) {
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onError( e );
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} else {
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console.error( e );
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}
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this.manager.itemError( url );
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}
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}, onProgress, onError );
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}
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parse( str ) {
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// Remove empty lines and comments
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str = str
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.replace( /^#.*?(\n|\r)/gm, '' )
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.replace( /^\s*?(\n|\r)/gm, '' )
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.trim();
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let title = null;
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let size = null;
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const domainMin = new Vector3( 0, 0, 0 );
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const domainMax = new Vector3( 1, 1, 1 );
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const lines = str.split( /[\n\r]+/g );
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let data = null;
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let currIndex = 0;
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for ( let i = 0, l = lines.length; i < l; i ++ ) {
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const line = lines[ i ].trim();
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const split = line.split( /\s/g );
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switch ( split[ 0 ] ) {
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case 'TITLE':
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title = line.substring( 7, line.length - 1 );
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break;
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case 'LUT_3D_SIZE':
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// TODO: A .CUBE LUT file specifies floating point values and could be represented with
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// more precision than can be captured with Uint8Array.
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const sizeToken = split[ 1 ];
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size = parseFloat( sizeToken );
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data = new Uint8Array( size * size * size * 4 );
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break;
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case 'DOMAIN_MIN':
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domainMin.x = parseFloat( split[ 1 ] );
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domainMin.y = parseFloat( split[ 2 ] );
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domainMin.z = parseFloat( split[ 3 ] );
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break;
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case 'DOMAIN_MAX':
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domainMax.x = parseFloat( split[ 1 ] );
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domainMax.y = parseFloat( split[ 2 ] );
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domainMax.z = parseFloat( split[ 3 ] );
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break;
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default:
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const r = parseFloat( split[ 0 ] );
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const g = parseFloat( split[ 1 ] );
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const b = parseFloat( split[ 2 ] );
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if (
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r > 1.0 || r < 0.0 ||
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g > 1.0 || g < 0.0 ||
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b > 1.0 || b < 0.0
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) {
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throw new Error( 'LUTCubeLoader : Non normalized values not supported.' );
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}
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data[ currIndex + 0 ] = r * 255;
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data[ currIndex + 1 ] = g * 255;
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data[ currIndex + 2 ] = b * 255;
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data[ currIndex + 3 ] = 255;
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currIndex += 4;
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}
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}
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const texture = new DataTexture();
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texture.image.data = data;
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texture.image.width = size;
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texture.image.height = size * size;
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texture.type = UnsignedByteType;
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texture.magFilter = LinearFilter;
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texture.minFilter = LinearFilter;
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texture.wrapS = ClampToEdgeWrapping;
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texture.wrapT = ClampToEdgeWrapping;
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texture.generateMipmaps = false;
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texture.needsUpdate = true;
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const texture3D = new Data3DTexture();
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texture3D.image.data = data;
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texture3D.image.width = size;
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texture3D.image.height = size;
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texture3D.image.depth = size;
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texture3D.type = UnsignedByteType;
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texture3D.magFilter = LinearFilter;
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texture3D.minFilter = LinearFilter;
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texture3D.wrapS = ClampToEdgeWrapping;
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texture3D.wrapT = ClampToEdgeWrapping;
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texture3D.wrapR = ClampToEdgeWrapping;
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texture3D.generateMipmaps = false;
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texture3D.needsUpdate = true;
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return {
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title,
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size,
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domainMin,
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domainMax,
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texture,
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texture3D,
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};
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}
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}
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