pex-renderer/shaders/chunks/encode-decode.glsl.js

Physically Based Renderer for Pex

module.exports = /* glsl */ `
#define LINEAR 1
#define GAMMA 2
#define SRGB 3
#define RGBM 4

vec4 decode(vec4 pixel, int encoding) {
  if (encoding == LINEAR) return pixel;
  if (encoding == GAMMA) return toLinear(pixel);
  if (encoding == SRGB) return toLinear(pixel);
  if (encoding == RGBM) return vec4(decodeRGBM(pixel), 1.0);
  return pixel;
}

vec4 encode(vec4 pixel, int encoding) {
  if (encoding == LINEAR) return pixel;
  if (encoding == GAMMA) return toGamma(pixel);
  if (encoding == SRGB) return toGamma(pixel);
  if (encoding == RGBM) return encodeRGBM(pixel.rgb);
  return pixel;
}
`