27 lines
1.1 KiB
Plaintext
27 lines
1.1 KiB
Plaintext
float3 falseColorRamp(float luma)
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{
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if (luma < 0.05)
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return float3(0.0, 0.0, 0.0);
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if (luma < 0.15)
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return lerp(float3(0.04, 0.02, 0.24), float3(0.05, 0.18, 0.95), smoothstep(0.05, 0.15, luma));
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if (luma < 0.35)
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return lerp(float3(0.05, 0.18, 0.95), float3(0.0, 0.85, 1.0), smoothstep(0.15, 0.35, luma));
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if (luma < 0.55)
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return lerp(float3(0.0, 0.85, 1.0), float3(0.18, 0.95, 0.18), smoothstep(0.35, 0.55, luma));
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if (luma < 0.75)
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return lerp(float3(0.18, 0.95, 0.18), float3(1.0, 0.92, 0.08), smoothstep(0.55, 0.75, luma));
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if (luma < 0.9)
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return lerp(float3(1.0, 0.92, 0.08), float3(1.0, 0.35, 0.02), smoothstep(0.75, 0.9, luma));
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return lerp(float3(1.0, 0.35, 0.02), float3(1.0, 0.0, 0.0), smoothstep(0.9, 1.0, luma));
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}
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float4 shadeVideo(ShaderContext context)
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{
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float3 source = context.sourceColor.rgb;
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float luma = saturate((dot(source, float3(0.2126, 0.7152, 0.0722)) + lift) * max(gain, 0.001));
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float3 mapped = falseColorRamp(luma);
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if (showLuma)
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mapped = lerp(mapped, float3(luma, luma, luma), 0.45);
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return float4(lerp(source, mapped, saturate(blendAmount)), context.sourceColor.a);
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}
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