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https://github.com/italicsjenga/slang-shaders.git
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Update chromaticity.slang
automate color modes
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metallic77
GitHub
parent
70167dab20
commit
9baa8162a5
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@ -25,41 +25,14 @@ layout(push_constant) uniform Push
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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float CHROMA_A_X,CHROMA_A_Y,CHROMA_B_X,CHROMA_B_Y,CHROMA_C_X,CHROMA_C_Y,CHROMA_A_WEIGHT,
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CHROMA_B_WEIGHT,CHROMA_C_WEIGHT,CRT_TR0,CRT_TR,CRT_TR2,SCALE_W,GAMMAIN,GAMMAOUT;
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float COLOR_MODE,GAMMAIN,GAMMAOUT;
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} params;
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#pragma parameter Readme "READ GLSL FILE FOR VARIOUS COEFFS" 0.0 0.0 1.0 1.0
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#pragma parameter CHROMA_A_X "Chromaticity R x" 0.670 0.0 1.0 0.001
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#pragma parameter CHROMA_A_Y "Chromaticity R y" 0.330 0.0 1.0 0.001
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#pragma parameter CHROMA_B_X "Chromaticity G x" 0.210 0.0 1.0 0.001
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#pragma parameter CHROMA_B_Y "Chromaticity G y" 0.710 0.0 1.0 0.001
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#pragma parameter CHROMA_C_X "Chromaticity B x" 0.140 0.0 1.0 0.001
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#pragma parameter CHROMA_C_Y "Chromaticity B y" 0.080 0.0 1.0 0.001
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#pragma parameter CHROMA_A_WEIGHT "Chromaticity R luminance weight" 0.299 0.0 1.0 0.01
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#pragma parameter CHROMA_B_WEIGHT "Chromaticity G luminance weight" 0.587 0.0 1.0 0.01
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#pragma parameter CHROMA_C_WEIGHT "Chromaticity B luminance weight" 0.114 0.0 1.0 0.01
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#pragma parameter CRT_TR0 "Transfer Function" 0.018 0.0 0.2 0.001
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#pragma parameter CRT_TR "Transfer Function" 0.099 0.0 0.2 0.001
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#pragma parameter CRT_TR2 "Transfer Function" 4.5 3.0 5.0 0.05
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#pragma parameter SCALE_W "Scale white point" 1.0 0.0 1.0 1.0
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#pragma parameter GAMMAIN "Gamma In" 2.4 1.0 4.0 0.05
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#pragma parameter GAMMAOUT "Gamma Out" 2.2 1.0 4.0 0.05
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#pragma parameter COLOR_MODE "SRGB,SMPTE C,REC709,BT2020,SMPTE240,NTSC1953,EBU" 0.0 0.0 6.0 1.0
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#pragma parameter GAMMAIN "Gamma In" 2.0 1.0 4.0 0.05
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#pragma parameter GAMMAOUT "Gamma Out" 2.0 1.0 4.0 0.05
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#define CHROMA_A_X params.CHROMA_A_X
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#define CHROMA_A_Y params.CHROMA_A_Y
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#define CHROMA_B_X params.CHROMA_B_X
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#define CHROMA_B_Y params.CHROMA_B_Y
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#define CHROMA_C_X params.CHROMA_C_X
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#define CHROMA_C_Y params.CHROMA_C_Y
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#define CHROMA_A_WEIGHT params.CHROMA_A_WEIGHT
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#define CHROMA_B_WEIGHT params.CHROMA_B_WEIGHT
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#define CHROMA_C_WEIGHT params.CHROMA_C_WEIGHT
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#define CRT_TR0 params.CRT_TR0
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#define CRT_TR params.CRT_TR
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#define CRT_TR2 params.CRT_TR2
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#define SCALE_W params.SCALE_W
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#define COLOR_MODE params.COLOR_MODE
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#define GAMMAIN params.GAMMAIN
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#define GAMMAOUT params.GAMMAOUT
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#define WHITE vec3(1.0, 1.0, 1.0)
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@ -135,6 +108,54 @@ vec3 xyY_to_XYZ(const vec3 xyY)
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vec3 Yrgb_to_RGB(mat3 toRGB, vec3 W, vec3 Yrgb)
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{
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//0 SRGB 0.640 0.330 / 0.300 0.600 / 0.150 0.060 --
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//1 SMPTE C 0.630 0.340 / 0.310 0.595 / 0.155 0.070 --
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//2 REC709 0.640 0.330 / 0.300 0.600 / 0.150 0.060 --
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//3 BT2020 0.708 0.292 / 0.170 0.797 / 0.131 0.046 --
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//4 SMPTE240 0.630 0.340 / 0.310 0.595 / 0.155 0.070 --
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//5 NTSC1953 0.670 0.330 / 0.210 0.710 / 0.140 0.080
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//6 EBU 0.640 0.330 / 0.290 0.600 / 0.150 0.060 --
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float CHROMA_A_X, CHROMA_A_Y,CHROMA_B_X, CHROMA_B_Y, CHROMA_C_X, CHROMA_C_Y;
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if (COLOR_MODE == 0.0 || COLOR_MODE == 2.0 || COLOR_MODE == 6.0)
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{
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CHROMA_A_X=0.64;
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CHROMA_A_Y=0.33;
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CHROMA_B_X=0.3;
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CHROMA_B_Y=0.6;
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CHROMA_C_X= 0.15;
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CHROMA_C_Y= 0.06;
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}
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else if (COLOR_MODE == 1.0 || COLOR_MODE == 4.0)
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{
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CHROMA_A_X=0.63;
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CHROMA_A_Y=0.34;
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CHROMA_B_X=0.31;
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CHROMA_B_Y=0.595;
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CHROMA_C_X= 0.155;
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CHROMA_C_Y= 0.070;
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}
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else if (COLOR_MODE == 3.0 )
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{
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CHROMA_A_X=0.708;
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CHROMA_A_Y=0.292;
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CHROMA_B_X=0.17;
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CHROMA_B_Y=0.797;
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CHROMA_C_X= 0.131;
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CHROMA_C_Y= 0.046;
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}
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else if (COLOR_MODE == 6.0 )
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{
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CHROMA_A_X=0.67;
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CHROMA_A_Y=0.33;
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CHROMA_B_X=0.21;
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CHROMA_B_Y=0.71;
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CHROMA_C_X= 0.14;
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CHROMA_C_Y= 0.08;
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}
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mat3 xyYrgb = mat3(CHROMA_A_X, CHROMA_A_Y, Yrgb.r,
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CHROMA_B_X, CHROMA_B_Y, Yrgb.g,
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CHROMA_C_X, CHROMA_C_Y, Yrgb.b);
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@ -149,10 +170,90 @@ vec3 Yrgb_to_RGB(mat3 toRGB, vec3 W, vec3 Yrgb)
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dot(W, vec3(RGBrgb[0].b, RGBrgb[1].b, RGBrgb[2].b)));
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}
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vec3 luminance()
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{
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//0 SRGB 0.299 0.587 0.114
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//1 SMPTE C 0.299 0.587 0.114
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//2 REC709 0.212 0.715 0.072
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//3 BT2020 0.262 0.678 0.059
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//4 SMPTE240 0.212 0.701 0.086
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//5 NTSC1953 0.299 0.587 0.114
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//6 EBU 0.299 0.587 0.114
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float CHROMA_A_WEIGHT, CHROMA_B_WEIGHT, CHROMA_C_WEIGHT;
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if (COLOR_MODE == 0.0 || COLOR_MODE == 1.0 ||
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COLOR_MODE == 5.0 || COLOR_MODE == 6.0)
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{
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CHROMA_A_WEIGHT = 0.299;
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CHROMA_B_WEIGHT = 0.587;
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CHROMA_C_WEIGHT = 0.114;
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}
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else if (COLOR_MODE == 2.0 || COLOR_MODE == 4.0)
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{
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CHROMA_A_WEIGHT = 0.212;
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CHROMA_B_WEIGHT = 0.715;
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CHROMA_C_WEIGHT = 0.072;
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}
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else if (COLOR_MODE == 3.0 )
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{
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CHROMA_A_WEIGHT = 0.262;
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CHROMA_B_WEIGHT = 0.678;
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CHROMA_C_WEIGHT = 0.059;
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}
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return vec3(CHROMA_A_WEIGHT, CHROMA_B_WEIGHT, CHROMA_C_WEIGHT);
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}
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float sdr_linear(const float x)
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{
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return x < CRT_TR0 ? x / CRT_TR2 : pow((x + CRT_TR) / (1.0+ CRT_TR), GAMMAIN);
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// RX RY GX GY BX BY RL GL BL TR1 TR2 TR3
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//0 SRGB 0.040 0.055 12.92
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//1 SMPTE C 0.018 0.099 4.5
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//2 REC709 0.018 0.099 4.5
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//3 BT2020 0.059 0.099 4.5
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//4 SMPTE240 0.091 0.111 4.0
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//5 NTSC1953 0.081 0.099 4.5
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//6 EBU 0.081 0.099 4.5
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float CRT_TR1 ,CRT_TR2, CRT_TR3;
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if (COLOR_MODE == 0.0)
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{
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CRT_TR1 = 0.040;
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CRT_TR2 = 0.055;
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CRT_TR3 = 12.92;
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}
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else if (COLOR_MODE == 1.0 || COLOR_MODE == 2.0)
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{
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CRT_TR1 = 0.040;
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CRT_TR2 = 0.099;
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CRT_TR3 = 4.5;
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}
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else if (COLOR_MODE == 3.0 )
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{
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CRT_TR1 = 0.059;
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CRT_TR2 = 0.099;
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CRT_TR3 = 4.5;
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}
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else if (COLOR_MODE == 4.0 )
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{
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CRT_TR1 = 0.061;
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CRT_TR2 = 0.111;
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CRT_TR3 = 4.0;
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}
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else if (COLOR_MODE == 5.0 || COLOR_MODE == 6.0)
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{
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CRT_TR1 = 0.081;
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CRT_TR2 = 0.099;
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CRT_TR3 = 4.5;
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}
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return x < CRT_TR2 ? x / CRT_TR3 : pow((x + CRT_TR1) / (1.0+ CRT_TR1), GAMMAIN);
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}
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vec3 sdr_linear(const vec3 x)
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@ -175,14 +276,9 @@ void main()
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mat3 toRGB = colorspace_rgb();
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vec3 Yrgb = texture(Source, vTexCoord).rgb;
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Yrgb = sdr_linear(Yrgb);
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vec3 W = vec3(CHROMA_A_WEIGHT, CHROMA_B_WEIGHT, CHROMA_C_WEIGHT);
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vec3 W = luminance();
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vec3 RGB = Yrgb_to_RGB(toRGB, W, Yrgb);
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if (SCALE_W > 0.0) {
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vec3 white = Yrgb_to_RGB(toRGB, W, WHITE);
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float G = 1.0 / max(max(white.r, white.g), white.b);
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RGB *= G;
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}
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RGB = clamp(RGB, 0.0, 1.0);
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RGB = srgb_gamma(RGB);
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FragColor = vec4(RGB, 1.0);
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