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19 lines
450 B
C
19 lines
450 B
C
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#ifndef SAT_LUM
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#define SAT_LUM
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#pragma parameter ia_saturation "Chrominance" 1.0 0.01 2.0 0.01
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#pragma parameter ia_luminance "Luminance" 1.0 0.0 2.0 0.01
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#include "col_tools.h"
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// Note: This saturation should be similar to broadcast television.
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// 0% chrome == pure luma.
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vec3 sat_lum(vec3 in_col){
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vec3 out_col = RGBtoYIQ(in_col);
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out_col *= vec3(ia_luminance, ia_saturation, ia_saturation);
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return YIQtoRGB(out_col);
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}
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#endif
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