Justin Marshall
41 lines
1.3 KiB
SourcePawn
41 lines
1.3 KiB
SourcePawn
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/*
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==================================================================================
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Equations to convert color values to luminance values using various ITU standards.
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==================================================================================
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*/
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/*
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==================================================================================
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ITU HDR standard BT-709-5
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EY? = 0.2126 ER? + 0.7152 EG? + 0.0722 EB
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www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-5-200204-I!!PDF-E.pdf
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int float colorRGB;
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out float luminance;
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==================================================================================
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*/
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#template Luminance_BT709( luminance, colorRGB )
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{
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const float3 ituBT709 = float3( 0.2126, 0.7152, 0.0722 );
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lumiancne = dot( colorRGB, ituBT709 );
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}
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#endtemplate
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/*
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==================================================================================
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ITU HDR standard BT-601-6
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EY ? = 0.299 ER ? + 0.587 EG ? + 0.114 EB
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www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.601-6-200701-S!!PDF-E.pdf
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int float colorRGB;
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out float luminance;
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==================================================================================
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*/
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#template Luminance_BT601( luminance, colorRGB )
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{
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const float3 ituBT601 = float3( 0.299, 0.587, 0.114 );
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luminance = dot( colorRGB, ituBT601 );
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}
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#endtemplate
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