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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | //This file is automatically rebuilt by the Cesium build process.
export default "// KhronosGroup https://github.com/KhronosGroup/ToneMapping/tree/main/PBR_Neutral\n\
\n\
// Input color is non-negative and resides in the Linear Rec. 709 color space.\n\
// Output color is also Linear Rec. 709, but in the [0, 1] range.\n\
\n\
vec3 czm_pbrNeutralTonemapping(vec3 color) {\n\
const float startCompression = 0.8 - 0.04;\n\
const float desaturation = 0.15;\n\
\n\
float x = min(color.r, min(color.g, color.b));\n\
float offset = czm_branchFreeTernary(x < 0.08, x - 6.25 * x * x, 0.04);\n\
color -= offset;\n\
\n\
float peak = max(color.r, max(color.g, color.b));\n\
if (peak < startCompression) return color;\n\
\n\
const float d = 1.0 - startCompression;\n\
float newPeak = 1.0 - d * d / (peak + d - startCompression);\n\
color *= newPeak / peak;\n\
\n\
float g = 1.0 - 1.0 / (desaturation * (peak - newPeak) + 1.0);\n\
return mix(color, newPeak * vec3(1.0, 1.0, 1.0), g);\n\
}\n\
";
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