threepipe/lib/three/utils/encoding.js

A 3D viewer framework built on top of three.js in TypeScript with a focus on quality rendering, modularity and extensibility.

import { LinearSRGBColorSpace, NoColorSpace, RGBM16ColorSpace, SRGBColorSpace } from 'three';
// three.js WebGLProgram.js
export function getTexelDecodingFunction(functionName, colorSpace) {
    let fn;
    switch (colorSpace) {
        case NoColorSpace:
        case LinearSRGBColorSpace:
            fn = '';
            break;
        case SRGBColorSpace:
            // fn = 'sRGBToLinear' // todo required?
            fn = '';
            break;
        case RGBM16ColorSpace:
            fn = 'RGBM16ToLinear';
            break;
        default:
            console.warn('THREE.WebGLProgram: Unsupported color space:', colorSpace);
            fn = '';
            break;
    }
    // return `vec4 ${functionName}( vec4 value ) { return ${components[ 0 ]}ToLinear${components[ 1 ]}; }`;
    // return `vec4 ${functionName}( vec4 value ) { return ${fn} ( value ); }`
    return `#define ${functionName}( value ) ${fn} ( value )`;
}
export function getTexelDecoding(mapName, colorSpace) {
    return getTexelDecodingFunction(mapName + 'TexelToLinear', colorSpace ?? LinearSRGBColorSpace) + '\n';
}
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