mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-11-23 08:11:29 +11:00
65 lines
2.3 KiB
PHP
65 lines
2.3 KiB
PHP
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// Useful Constants
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const vec4 Zero = vec4(0.0);
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const vec4 Half = vec4(0.5);
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const vec4 One = vec4(1.0);
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const vec4 Two = vec4(2.0);
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const vec3 Gray = vec3(0.3, 0.59, 0.11);
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const float Pi = 3.1415926535;
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const float Pi2 = 6.283185307;
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// NTSC Constants
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const vec4 A = vec4(0.5);
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const vec4 A2 = vec4(1.0);
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const vec4 B = vec4(0.5);
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const float P = 1.0;
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const float CCFrequency = 3.59754545;
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const float NotchUpperFrequency = 3.59754545 + 2.0;
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const float NotchLowerFrequency = 3.59754545 - 2.0;
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const float YFrequency = 6.0;
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const float IFrequency = 1.2;
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const float QFrequency = 0.6;
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const float NotchHalfWidth = 2.0;
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const float ScanTime = 52.6;
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const float Pi2ScanTime = 6.283185307 * 52.6;
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const float MaxC = 2.1183;
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const vec4 YTransform = vec4(0.299, 0.587, 0.114, 0.0);
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const vec4 ITransform = vec4(0.595716, -0.274453, -0.321263, 0.0);
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const vec4 QTransform = vec4(0.211456, -0.522591, 0.311135, 0.0);
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const vec3 YIQ2R = vec3(1.0, 0.956, 0.621);
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const vec3 YIQ2G = vec3(1.0, -0.272, -0.647);
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const vec3 YIQ2B = vec3(1.0, -1.106, 1.703);
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const vec4 MinC = vec4(-1.1183);
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const vec4 CRange = vec4(3.2366);
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const vec4 InvCRange = vec4(1.0/3.2366);
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const float Pi2Length = Pi2 / 63.0;
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const vec4 NotchOffset = vec4(0.0, 1.0, 2.0, 3.0);
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const vec4 W = vec4(Pi2 * CCFrequency * ScanTime);
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// Color Convolution Constants
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const vec3 RedMatrix = vec3(1.0, 0.0, 0.0);
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const vec3 GrnMatrix = vec3(0.0, 1.0, 0.0);
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const vec3 BluMatrix = vec3(0.0, 0.0, 1.0);
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const vec3 DCOffset = vec3(0.0, 0.0, 0.0);
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const vec3 ColorScale = vec3(0.95, 0.95, 0.95);
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const float Saturation = 1.4;
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// Deconverge Constants
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const vec3 ConvergeX = vec3(-0.4, 0.0, 0.2);
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const vec3 ConvergeY = vec3( 0.0, -0.4, 0.2);
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const vec3 RadialConvergeX = vec3(1.0, 1.0, 1.0);
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const vec3 RadialConvergeY = vec3(1.0, 1.0, 1.0);
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// Scanline/Pincushion Constants
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const float PincushionAmount = 0.015;
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const float CurvatureAmount = 0.015;
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//const float ScanlineAmount = 0.175; <- move to parameter
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const float ScanlineScale = 1.0;
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const float ScanlineHeight = 1.0;
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const float ScanlineBrightScale = 1.0;
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const float ScanlineBrightOffset = 0.0;
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const float ScanlineOffset = 0.0;
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const vec3 Floor = vec3(0.05, 0.05, 0.05);
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// 60Hz Bar Constants
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const float SixtyHertzRate = (60.0 / 59.97 - 1.0); // Difference between NTSC and line frequency
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const float SixtyHertzScale = 0.1;
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