#version 450 /* Filename: chromaticity Copyright (C) 2023 W. M. Martinez splitted and adjusted by DariusG This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ layout(push_constant) uniform Push { vec4 SourceSize; vec4 OriginalSize; vec4 OutputSize; uint FrameCount; float CHROMA_A_X,CHROMA_A_Y,CHROMA_B_X,CHROMA_B_Y,CHROMA_C_X,CHROMA_C_Y,CHROMA_A_WEIGHT, CHROMA_B_WEIGHT,CHROMA_C_WEIGHT,CRT_TR0,CRT_TR,CRT_TR2,SCALE_W,GAMMAIN,GAMMAOUT; } params; #pragma parameter Readme "READ GLSL FILE FOR VARIOUS COEFFS" 0.0 0.0 1.0 1.0 #pragma parameter CHROMA_A_X "Chromaticity R x" 0.670 0.0 1.0 0.001 #pragma parameter CHROMA_A_Y "Chromaticity R y" 0.330 0.0 1.0 0.001 #pragma parameter CHROMA_B_X "Chromaticity G x" 0.210 0.0 1.0 0.001 #pragma parameter CHROMA_B_Y "Chromaticity G y" 0.710 0.0 1.0 0.001 #pragma parameter CHROMA_C_X "Chromaticity B x" 0.140 0.0 1.0 0.001 #pragma parameter CHROMA_C_Y "Chromaticity B y" 0.080 0.0 1.0 0.001 #pragma parameter CHROMA_A_WEIGHT "Chromaticity R luminance weight" 0.299 0.0 1.0 0.01 #pragma parameter CHROMA_B_WEIGHT "Chromaticity G luminance weight" 0.587 0.0 1.0 0.01 #pragma parameter CHROMA_C_WEIGHT "Chromaticity B luminance weight" 0.114 0.0 1.0 0.01 #pragma parameter CRT_TR0 "Transfer Function" 0.018 0.0 0.2 0.001 #pragma parameter CRT_TR "Transfer Function" 0.099 0.0 0.2 0.001 #pragma parameter CRT_TR2 "Transfer Function" 4.5 3.0 5.0 0.05 #pragma parameter SCALE_W "Scale white point" 1.0 0.0 1.0 1.0 #pragma parameter GAMMAIN "Gamma In" 2.4 1.0 4.0 0.05 #pragma parameter GAMMAOUT "Gamma Out" 2.2 1.0 4.0 0.05 #define CHROMA_A_X params.CHROMA_A_X #define CHROMA_A_Y params.CHROMA_A_Y #define CHROMA_B_X params.CHROMA_B_X #define CHROMA_B_Y params.CHROMA_B_Y #define CHROMA_C_X params.CHROMA_C_X #define CHROMA_C_Y params.CHROMA_C_Y #define CHROMA_A_WEIGHT params.CHROMA_A_WEIGHT #define CHROMA_B_WEIGHT params.CHROMA_B_WEIGHT #define CHROMA_C_WEIGHT params.CHROMA_C_WEIGHT #define CRT_TR0 params.CRT_TR0 #define CRT_TR params.CRT_TR #define CRT_TR2 params.CRT_TR2 #define SCALE_W params.SCALE_W #define GAMMAIN params.GAMMAIN #define GAMMAOUT params.GAMMAOUT #define WHITE vec3(1.0, 1.0, 1.0) /* SMPTE-C/170M used by NTSC and PAL and by SDTV in general. REC709 used by HDTV in general. SRGB used by most webcams and computer graphics. ***NOTE***: Gamma 2.4 BT2020 used by Ultra-high definition television (UHDTV) and wide color gamut. SMPTE240 used during the early days of HDTV (1988-1998). NTSC1953 used by NTSC at 1953. EBU used by PAL/SECAM in 1975. Identical to REC601. */ // RX RY GX GY BX BY RL GL BL TR0 TR TR2 // SMPTE C 0.630 0.340 / 0.310 0.595 / 0.155 0.070 / 0.299 0.587 0.114 / 0.018 0.099 4.5 // REC709 0.640 0.330 / 0.300 0.600 / 0.150 0.060 / 0.212 0.715 0.072 / 0.018 0.099 4.5 // SRGB 0.640 0.330 / 0.300 0.600 / 0.150 0.060 / 0.299 0.587 0.114 / 0.040 0.055 12.92 // BT2020 0.708 0.292 / 0.170 0.797 / 0.131 0.046 / 0.262 0.678 0.059 / 0.059 0.099 4.5 // SMPTE240 0.630 0.340 / 0.310 0.595 / 0.155 0.070 / 0.212 0.701 0.086 / 0.091 0.111 4.0 // NTSC1953 0.670 0.330 / 0.210 0.710 / 0.140 0.080 / 0.210 0.710 0.080 / 0.081 0.099 4.5 // EBU 0.640 0.330 / 0.290 0.600 / 0.150 0.060 / 0.299 0.587 0.114 / 0.081 0.099 4.5 // SECAM 0.640 0.330 / 0.290 0.600 / 0.150 0.060 / 0.334 0.585 0.081 / 0.081 0.099 4.5 layout(std140, set = 0, binding = 0) uniform UBO { mat4 MVP; } global; #pragma stage vertex layout(location = 0) in vec4 Position; layout(location = 1) in vec2 TexCoord; layout(location = 0) out vec2 vTexCoord; void main() { gl_Position = global.MVP * Position; vTexCoord = TexCoord; } #pragma stage fragment layout(location = 0) in vec2 vTexCoord; layout(location = 0) out vec4 FragColor; layout(set = 0, binding = 2) uniform sampler2D Source; mat3 XYZ_TO_sRGB = mat3( 3.2406255, -0.9689307, 0.0557101, -1.5372080, 1.8758561, -0.2040211, -0.4986286, 0.0415175, 1.0569959); mat3 colorspace_rgb() { return XYZ_TO_sRGB; } vec3 xyY_to_XYZ(const vec3 xyY) { float x = xyY.x; float y = xyY.y; float Y = xyY.z; float z = 1.0 - x - y; return vec3(Y * x / y, Y, Y * z / y); } vec3 Yrgb_to_RGB(mat3 toRGB, vec3 W, vec3 Yrgb) { mat3 xyYrgb = mat3(CHROMA_A_X, CHROMA_A_Y, Yrgb.r, CHROMA_B_X, CHROMA_B_Y, Yrgb.g, CHROMA_C_X, CHROMA_C_Y, Yrgb.b); mat3 XYZrgb = mat3(xyY_to_XYZ(xyYrgb[0]), xyY_to_XYZ(xyYrgb[1]), xyY_to_XYZ(xyYrgb[2])); mat3 RGBrgb = mat3(toRGB * XYZrgb[0], toRGB * XYZrgb[1], toRGB * XYZrgb[2]); return vec3(dot(W, vec3(RGBrgb[0].r, RGBrgb[1].r, RGBrgb[2].r)), dot(W, vec3(RGBrgb[0].g, RGBrgb[1].g, RGBrgb[2].g)), dot(W, vec3(RGBrgb[0].b, RGBrgb[1].b, RGBrgb[2].b))); } float sdr_linear(const float x) { return x < CRT_TR0 ? x / CRT_TR2 : pow((x + CRT_TR) / (1.0+ CRT_TR), GAMMAIN); } vec3 sdr_linear(const vec3 x) { return vec3(sdr_linear(x.r), sdr_linear(x.g), sdr_linear(x.b)); } float srgb_gamma(const float x) { return x <= 0.0031308 ? 12.92 * x : 1.055 * pow(x, 1.0 / GAMMAOUT) - 0.055; } vec3 srgb_gamma(const vec3 x) { return vec3(srgb_gamma(x.r), srgb_gamma(x.g), srgb_gamma(x.b)); } void main() { mat3 toRGB = colorspace_rgb(); vec3 Yrgb = texture(Source, vTexCoord).rgb; Yrgb = sdr_linear(Yrgb); vec3 W = vec3(CHROMA_A_WEIGHT, CHROMA_B_WEIGHT, CHROMA_C_WEIGHT); vec3 RGB = Yrgb_to_RGB(toRGB, W, Yrgb); if (SCALE_W > 0.0) { vec3 white = Yrgb_to_RGB(toRGB, W, WHITE); float G = 1.0 / max(max(white.r, white.g), white.b); RGB *= G; } RGB = clamp(RGB, 0.0, 1.0); RGB = srgb_gamma(RGB); FragColor = vec4(RGB, 1.0); }