From 55e0796400452da6f6c48feda6eabec1df157d43 Mon Sep 17 00:00:00 2001 From: MajorPainTheCactus Date: Sat, 5 Mar 2022 15:25:32 +0000 Subject: [PATCH] Fixed gamma curve - was using sRGB now using rec.601 / rec.709 gamma curve Added NTSC-U, NTSC-J, PAL colour systems and corresponding default white points Added colour grading: white temperature, brightness, contrast --- hdr/crt-sony-pvm-4k-hdr.slangp | 2 +- hdr/shaders/crt-hdr.slang | 87 ++++++------- hdr/shaders/include/colour_grade.h | 152 ++++++++++++++++++++++ hdr/shaders/include/scanline_generation.h | 88 ++++--------- 4 files changed, 217 insertions(+), 112 deletions(-) create mode 100644 hdr/shaders/include/colour_grade.h diff --git a/hdr/crt-sony-pvm-4k-hdr.slangp b/hdr/crt-sony-pvm-4k-hdr.slangp index dc4f20f..796d61a 100644 --- a/hdr/crt-sony-pvm-4k-hdr.slangp +++ b/hdr/crt-sony-pvm-4k-hdr.slangp @@ -35,7 +35,7 @@ alias0 = "" float_framebuffer0 = "false" srgb_framebuffer0 = "false" -hcrt_red_vertical_convergence = "-0.200000" +hcrt_red_vertical_convergence = "-0.140000" hcrt_green_vertical_convergence = "0.000000" hcrt_blue_vertical_convergence = "0.000000" hcrt_red_scanline_min = "0.550000" diff --git a/hdr/shaders/crt-hdr.slang b/hdr/shaders/crt-hdr.slang index 21c787c..2bbe0e2 100644 --- a/hdr/shaders/crt-hdr.slang +++ b/hdr/shaders/crt-hdr.slang @@ -25,14 +25,6 @@ THIS SHADER DOES NOT SUPPORT WRGB OLED (Due to the sub pixel layout of WRGB - RG #pragma format A2B10G10R10_UNORM_PACK32 -#define WHITE_BALANCE_CONTROL 0 - -#include "include\hdr10.h" - -#if WHITE_BALANCE_CONTROL -//#include "include\white_balance.h" -#endif // WHITE_BALANCE_CONTROL - layout(push_constant) uniform Push { // User Settings @@ -74,12 +66,21 @@ layout(push_constant) uniform Push float hcrt_blue_beam_sharpness; float hcrt_blue_beam_attack; -#if WHITE_BALANCE_CONTROL - float hcrt_white_temperature; - float hcrt_white_tint; -#endif // WHITE_BALANCE_CONTROL } params; +layout(std140, set = 0, binding = 0) uniform UBO +{ + mat4 MVP; + vec4 SourceSize; + vec4 OriginalSize; + vec4 OutputSize; + uint FrameCount; + + float hcrt_colour_system; + float hcrt_colour_space; + float hcrt_white_temperature; +} global; + #pragma parameter hcrt_title "SONY PVM/BVM HDR SHADER" 0.0 0.0 0.0001 0.0 #pragma parameter hcrt_space0 " " 0.0 0.0 0.0001 0.0 @@ -99,8 +100,8 @@ layout(push_constant) uniform Push #pragma parameter hcrt_paper_white_nits " Display's Paper White Luminance" 700.0 0.0 10000.0 10.0 #pragma parameter hcrt_lcd_resolution " Display's Resolution: 4K | 8K" 0.0 0.0 1.0 1.0 #pragma parameter hcrt_lcd_subpixel " Display's Subpixel Layout: RGB | BGR" 0.0 0.0 1.0 1.0 -#pragma parameter hcrt_brightness " Brightness" 1.0 0.0 2.0 0.01 -#pragma parameter hcrt_contrast " Contrast" -0.3 -3.0 3.0 0.05 +#pragma parameter hcrt_brightness " Brightness" 0.0 -1.0 1.0 0.05 +#pragma parameter hcrt_contrast " Contrast" 0.0 -1.0 1.0 0.05 #pragma parameter hcrt_expand_gamut " Original/Vivid" 0.0 0.0 1.0 1.0 #pragma parameter hcrt_red_vertical_convergence " Red Vertical Convergence" 0.00 -10.0 10.0 0.01 #pragma parameter hcrt_green_vertical_convergence " Green Vertical Convergence" 0.00 -10.0 10.0 0.01 @@ -113,6 +114,9 @@ layout(push_constant) uniform Push #pragma parameter hcrt_developer_settings "DEVELOPER SETTINGS:" 0.0 0.0 0.0001 0.0 #pragma parameter hcrt_crt_screen_type " CRT Type: APERTURE GRILLE | SHADOW MASK | SLOT MASK" 0.0 0.0 2.0 1.0 #pragma parameter hcrt_crt_resolution " CRT Resolution: 600TVL | 800TVL | 1000TVL" 0.0 0.0 2.0 1.0 +#pragma parameter hcrt_colour_system " CRT Colour System: PAL | NTSC-U | NTSC-J" 1.0 0.0 2.0 1.0 +#pragma parameter hcrt_colour_space " Colour Space: Rec.601/Rec.709 | sRGB" 0.0 0.0 1.0 1.0 +#pragma parameter hcrt_white_temperature " White Point: (PAL:D65, NTSC-U:D65, NTSC-J:D93)" 0.0 -5000.0 12000.0 100.0 #pragma parameter hcrt_developer_settings0 " VERTICAL SETTINGS:" 0.0 0.0 0.0001 0.0 #pragma parameter hcrt_red_scanline_min " Red Scanline Min" 0.50 0.0 2.0 0.01 @@ -132,11 +136,6 @@ layout(push_constant) uniform Push #pragma parameter hcrt_blue_beam_sharpness " Blue Beam Sharpness" 1.75 0.0 5.0 0.05 #pragma parameter hcrt_blue_beam_attack " Blue Beam Attack" 0.50 0.0 2.0 0.01 -#if WHITE_BALANCE_CONTROL -//#pragma parameter hcrt_whitetemperature "White Temperature" 6500.0 0.0 13000.0 50.0 -//#pragma parameter hcrt_whitetint "White Tint" 0.0 -1.0 1.0 0.01 -#endif // WHITE_BALANCE_CONTROL - #define HCRT_HDR params.hcrt_hdr #define HCRT_MAX_NITS params.hcrt_max_nits @@ -155,6 +154,9 @@ layout(push_constant) uniform Push #define HCRT_CRT_SCREEN_TYPE params.hcrt_crt_screen_type #define HCRT_CRT_RESOLUTION params.hcrt_crt_resolution +#define HCRT_CRT_COLOUR_SPACE global.hcrt_colour_space +#define HCRT_CRT_COLOUR_SYSTEM global.hcrt_colour_system +#define HCRT_WHITE_TEMPERATURE global.hcrt_white_temperature #define HCRT_RED_SCANLINE_MIN params.hcrt_red_scanline_min #define HCRT_RED_SCANLINE_MAX params.hcrt_red_scanline_max @@ -175,15 +177,6 @@ layout(push_constant) uniform Push #define COMPAT_TEXTURE(c, d) texture(c, d) -layout(std140, set = 0, binding = 0) uniform UBO -{ - mat4 MVP; - vec4 SourceSize; - vec4 OriginalSize; - vec4 OutputSize; - uint FrameCount; -} global; - #pragma stage vertex layout(location = 0) in vec4 Position; layout(location = 1) in vec2 TexCoord; @@ -394,22 +387,22 @@ float ModInteger(float a, float b) return floor(m + 0.5); } -#include "include\inverse_tonemap.h" +const mat4 kCubicBezier = mat4( 1.0f, 0.0f, 0.0f, 0.0f, + -3.0f, 3.0f, 0.0f, 0.0f, + 3.0f, -6.0f, 3.0f, 0.0f, + -1.0f, 3.0f, -3.0f, 1.0f ); -#define kLumaRatio 0.5f - -vec3 InverseTonemapConditional(const vec3 sdr_balanced) +float Bezier(const float t0, const vec4 control_points) { - if(HCRT_HDR > 0.0f) - { - return InverseTonemap(sdr_balanced, HCRT_MAX_NITS, HCRT_PAPER_WHITE_NITS, kLumaRatio); - } - else - { - return sdr_balanced; - } + vec4 t = vec4(1.0, t0, t0*t0, t0*t0*t0); + return dot(t, control_points * kCubicBezier); } +#include "include\hdr10.h" +#include "include\inverse_tonemap.h" +#include "include\colour_grade.h" +#include "include\scanline_generation.h" + vec3 Hdr10Conditional(const vec3 scanline_colour) { if(HCRT_HDR > 0.0f) @@ -422,18 +415,16 @@ vec3 Hdr10Conditional(const vec3 scanline_colour) } } -#include "include\scanline_generation.h" - void main() { - vec3 scanline_colour = GenerateScanline(global.SourceSize.xy); + vec3 scanline_colour = GenerateScanline(global.SourceSize.xy); - uint screen_type = uint(HCRT_CRT_SCREEN_TYPE); - uint crt_resolution = uint(HCRT_CRT_RESOLUTION); - uint lcd_resolution = uint(HCRT_LCD_RESOLUTION); - uint lcd_subpixel_layout = uint(HCRT_LCD_SUBPIXEL); + const uint screen_type = uint(HCRT_CRT_SCREEN_TYPE); + const uint crt_resolution = uint(HCRT_CRT_RESOLUTION); + const uint lcd_resolution = uint(HCRT_LCD_RESOLUTION); + const uint lcd_subpixel_layout = uint(HCRT_LCD_SUBPIXEL); - const vec2 current_position = vTexCoord * global.OutputSize.xy; + const vec2 current_position = vTexCoord * global.OutputSize.xy; switch(screen_type) { diff --git a/hdr/shaders/include/colour_grade.h b/hdr/shaders/include/colour_grade.h new file mode 100644 index 0000000..7180b97 --- /dev/null +++ b/hdr/shaders/include/colour_grade.h @@ -0,0 +1,152 @@ + +#define kColourSystems 3 + +#define kD50 5003.0f +#define kD55 5503.0f +#define kD65 6504.0f +#define kD75 7504.0f +#define kD93 9305.0f + +const mat3 XYZ_to_sRGB = mat3( + 3.24081254005432130, -0.969243049621582000, 0.055638398975133896, + -1.53730857372283940, 1.875966310501098600, -0.204007431864738460, + -0.49858659505844116, 0.041555050760507584, 1.057129383087158200); + +const mat3 sRGB_to_XYZ = mat3( + 0.41241079568862915, 0.21264933049678802, 0.019331756979227066, + 0.35758456587791443, 0.71516913175582890, 0.119194857776165010, + 0.18045382201671600, 0.07218152284622192, 0.950390160083770800); + +// Phosphor transforms found in Grade.slang + +// SMPTE-C - Measured Average Phosphor (1979-1994) +const mat3 P22_transform = mat3( + 0.4665636420249939, 0.25661000609397890, 0.005832045804709196, + 0.3039233088493347, 0.66820019483566280, 0.105618737637996670, + 0.1799621731042862, 0.07518967241048813, 0.977465748786926300); + +// SMPTE RP 145-1994 (SMPTE-C), 170M-1999 +// SMPTE-C - Standard Phosphor (Rec.601 NTSC) +const mat3 SMPTE_transform = mat3( + 0.39354196190834045, 0.21238772571086884, 0.01874009333550930, + 0.36525884270668030, 0.70106136798858640, 0.11193416267633438, + 0.19164848327636720, 0.08655092865228653, 0.95824241638183590); + +// SMPTE RP 145-1994 (SMPTE-C), 170M-1999 +// NTSC-J - Standard Phosphor (https://web.archive.org/web/20130413104152/http://arib.or.jp/english/html/overview/doc/4-TR-B09v1_0.pdf) +const mat3 NTSC_J_transform = mat3( + 0.39603787660598755, 0.22429330646991730, 0.02050681784749031, + 0.31201449036598206, 0.67417418956756590, 0.12814880907535553, + 0.24496731162071228, 0.10153251141309738, 1.26512730121612550); + +// ITU-R BT.470/601 (B/G) +// EBU Tech.3213-E PAL - Standard Phosphor for Studio Monitors +const mat3 EBU_transform = mat3( + 0.43194326758384705, 0.22272075712680817, 0.020247340202331543, + 0.34123489260673523, 0.70600330829620360, 0.129433929920196530, + 0.17818950116634370, 0.07127580046653748, 0.938464701175689700); + +// CRT Phosphor Gamut +const mat3 kPhosphorGamut[kColourSystems] = { EBU_transform , P22_transform, NTSC_J_transform }; + +const float kTemperatures[kColourSystems] = { kD65, kD65, kD93 }; // 8942.0f + + // Values from: http://blenderartists.org/forum/showthread.php?270332-OSL-Goodness&p=2268693&viewfull=1#post2268693 +const mat3 kWarmTemperature = mat3( + vec3(0.0, -2902.1955373783176, -8257.7997278925690), + vec3(0.0, 1669.5803561666639, 2575.2827530017594), + vec3(1.0, 1.3302673723350029, 1.8993753891711275)); + +const mat3 kCoolTemperature = mat3( + vec3( 1745.0425298314172, 1216.6168361476490, -8257.7997278925690), + vec3(-2666.3474220535695, -2173.1012343082230, 2575.2827530017594), + vec3( 0.55995389139931482, 0.70381203140554553, 1.8993753891711275)); + +vec3 WhiteBalance(float temperature, vec3 colour) +{ + const mat3 m = (temperature < kD65) ? kWarmTemperature : kCoolTemperature; + + const vec3 rgb_temperature = mix(clamp(vec3(m[0] / (vec3(clamp(temperature, 1000.0f, 40000.0f)) + m[1]) + m[2]), vec3(0.0f), vec3(1.0f)), vec3(1.0f), smoothstep(1000.0f, 0.0f, temperature)); + + vec3 result = colour * rgb_temperature; + + result *= dot(colour, vec3(0.2126, 0.7152, 0.0722)) / max(dot(result, vec3(0.2126, 0.7152, 0.0722)), 1e-5); // Preserve luminance + + return result; +} + +float r601r709ToLinear_1(const float channel) +{ + return (channel > 0.081f) ? pow((channel + 0.099f) * (1.0f / 1.099f), 1.0f / 0.45f) : channel * (1.0f / 4.5f); +} + +vec3 r601r709ToLinear(const vec3 colour) +{ + return vec3(r601r709ToLinear_1(colour.r), r601r709ToLinear_1(colour.g), r601r709ToLinear_1(colour.b)); +} + +const vec4 kTopBrightnessControlPoints = vec4(0.0f, 1.0f, 1.0f, 1.0f); +const vec4 kMidBrightnessControlPoints = vec4(0.0f, 1.0f / 3.0f, (1.0f / 3.0f) * 2.0f, 1.0f); +const vec4 kBottomBrightnessControlPoints = vec4(0.0f, 0.0f, 0.0f, 1.0f); + +vec3 Brightness(const vec3 colour) +{ + if(HCRT_BRIGHTNESS >= 0.0f) + { + return vec3(Bezier(colour.r, mix(kMidBrightnessControlPoints, kTopBrightnessControlPoints, HCRT_BRIGHTNESS)), + Bezier(colour.g, mix(kMidBrightnessControlPoints, kTopBrightnessControlPoints, HCRT_BRIGHTNESS)), + Bezier(colour.b, mix(kMidBrightnessControlPoints, kTopBrightnessControlPoints, HCRT_BRIGHTNESS))); + } + else + { + return vec3(Bezier(colour.r, mix(kMidBrightnessControlPoints, kBottomBrightnessControlPoints, abs(HCRT_BRIGHTNESS))), + Bezier(colour.g, mix(kMidBrightnessControlPoints, kBottomBrightnessControlPoints, abs(HCRT_BRIGHTNESS))), + Bezier(colour.b, mix(kMidBrightnessControlPoints, kBottomBrightnessControlPoints, abs(HCRT_BRIGHTNESS)))); + } +} +const vec4 kTopContrastControlPoints = vec4(0.0f, 0.0f, 1.0f, 1.0f); +const vec4 kMidContrastControlPoints = vec4(0.0f, 1.0f / 3.0f, (1.0f / 3.0f) * 2.0f, 1.0f); +const vec4 kBottomContrastControlPoints = vec4(0.0f, 1.0f, 0.0f, 1.0f); + +vec3 Contrast(const vec3 colour) +{ + if(HCRT_CONTRAST >= 0.0f) + { + return vec3(Bezier(colour.r, mix(kMidContrastControlPoints, kTopContrastControlPoints, HCRT_CONTRAST)), + Bezier(colour.g, mix(kMidContrastControlPoints, kTopContrastControlPoints, HCRT_CONTRAST)), + Bezier(colour.b, mix(kMidContrastControlPoints, kTopContrastControlPoints, HCRT_CONTRAST))); + } + else + { + return vec3(Bezier(colour.r, mix(kMidContrastControlPoints, kBottomContrastControlPoints, abs(HCRT_CONTRAST))), + Bezier(colour.g, mix(kMidContrastControlPoints, kBottomContrastControlPoints, abs(HCRT_CONTRAST))), + Bezier(colour.b, mix(kMidContrastControlPoints, kBottomContrastControlPoints, abs(HCRT_CONTRAST)))); + } +} + +float sRGBToLinear_1(const float channel) +{ + return (channel > 0.04045f) ? pow((channel + 0.055f) * (1.0f / 1.055f), 2.4f) : channel * (1.0f / 12.92f); +} + +vec3 sRGBToLinear(const vec3 colour) +{ + return vec3(sRGBToLinear_1(colour.r), sRGBToLinear_1(colour.g), sRGBToLinear_1(colour.b)); +} + +vec3 ColourGrade(const vec3 colour) +{ + const uint colour_system = uint(HCRT_CRT_COLOUR_SYSTEM); + + const vec3 brightness = Brightness(colour); + + const vec3 contrast = Contrast(brightness); + + const vec3 linear = HCRT_CRT_COLOUR_SPACE == 0.0f ? r601r709ToLinear(contrast) : sRGBToLinear(contrast); + + const vec3 gamut = kPhosphorGamut[colour_system] * linear; + + const vec3 white_point = WhiteBalance(kTemperatures[colour_system] + HCRT_WHITE_TEMPERATURE, gamut); + + return clamp(XYZ_to_sRGB * white_point, 0.0f, 1.0f); +} diff --git a/hdr/shaders/include/scanline_generation.h b/hdr/shaders/include/scanline_generation.h index a48bb3e..3e43e16 100644 --- a/hdr/shaders/include/scanline_generation.h +++ b/hdr/shaders/include/scanline_generation.h @@ -4,11 +4,7 @@ #define kMax 1.0f #define kBeamWidth 0.5f - -const mat4 kCubicBezier = mat4( 1.0f, 0.0f, 0.0f, 0.0f, - -3.0f, 3.0f, 0.0f, 0.0f, - 3.0f, -6.0f, 3.0f, 0.0f, - -1.0f, 3.0f, -3.0f, 1.0f ); +#define kLumaRatio 0.5f const vec4 kFallOffControlPoints = vec4(0.0f, 0.0f, 0.0f, 1.0f); const vec4 kAttackControlPoints = vec4(0.0f, 1.0f, 1.0f, 1.0f); @@ -38,35 +34,16 @@ vec4 BlueBeamControlPoints(const bool falloff) return falloff ? kFallOffControlPoints + vec4(0.0f, outer_attack, inner_attack, 0.0f) : kAttackControlPoints - vec4(0.0f, inner_attack, outer_attack, 0.0f); } -float Bezier(const float t0, const vec4 control_points) +vec3 InverseTonemapConditional(const vec3 linear) { - vec4 t = vec4(1.0, t0, t0*t0, t0*t0*t0); - return dot(t, control_points * kCubicBezier); -} - -float ToLinear1(float channel) -{ - return (channel > 0.04045f) ? pow(abs(channel) * (1.0f / 1.055f) + (0.055f / 1.055f), 2.4f) : channel * (1.0f / 12.92f); -} - -vec3 ToLinear(vec3 colour) -{ - return vec3(ToLinear1(colour.r), ToLinear1(colour.g), ToLinear1(colour.b)); -} - -float Contrast1(float linear, float channel) -{ - return (channel > 0.04045f) ? linear * pow(abs(channel) * (1.0f / 1.055f) + (0.055f / 1.055f), HCRT_CONTRAST) : channel * (1.0f / 12.92f); -} - -vec3 Contrast(vec3 linear, vec3 colour) -{ - return vec3(Contrast1(linear.r, colour.r), Contrast1(linear.g, colour.g), Contrast1(linear.b, colour.b)); -} - -vec3 Ramp(const vec3 luminance, const vec3 colour) -{ - return clamp(luminance * colour, 0.0, 1.0); + if(HCRT_HDR > 0.0f) + { + return InverseTonemap(linear, HCRT_MAX_NITS, HCRT_PAPER_WHITE_NITS, kLumaRatio); + } + else + { + return linear; + } } vec3 ScanlineColour(const vec2 source_size, const vec3 source_tex_coord_x, const vec3 narrowed_source_pixel_offset, inout vec3 next_prev) @@ -100,43 +77,28 @@ vec3 ScanlineColour(const vec2 source_size, const vec3 source_tex_coord_x, const const vec2 blue_tex_coord_0 = vec2(source_tex_coord_x.z, source_tex_coord_y.z); const vec2 blue_tex_coord_1 = vec2(source_tex_coord_x.z + (1.0f / source_size.x), source_tex_coord_y.z); - const float red_0 = COMPAT_TEXTURE(Source, red_tex_coord_0).x; - const float red_1 = COMPAT_TEXTURE(Source, red_tex_coord_1).x; + const float red_0 = COMPAT_TEXTURE(Source, red_tex_coord_0).x; + const float red_1 = COMPAT_TEXTURE(Source, red_tex_coord_1).x; - const float green_0 = COMPAT_TEXTURE(Source, green_tex_coord_0).y; - const float green_1 = COMPAT_TEXTURE(Source, green_tex_coord_1).y; + const float green_0 = COMPAT_TEXTURE(Source, green_tex_coord_0).y; + const float green_1 = COMPAT_TEXTURE(Source, green_tex_coord_1).y; - const float blue_0 = COMPAT_TEXTURE(Source, blue_tex_coord_0).z; - const float blue_1 = COMPAT_TEXTURE(Source, blue_tex_coord_1).z; + const float blue_0 = COMPAT_TEXTURE(Source, blue_tex_coord_0).z; + const float blue_1 = COMPAT_TEXTURE(Source, blue_tex_coord_1).z; - const vec3 sdr_colour_0 = vec3(red_0, green_0, blue_0); - const vec3 sdr_colour_1 = vec3(red_1, green_1, blue_1); + const vec3 sdr_colour_0 = ColourGrade(vec3(red_0, green_0, blue_0)); + const vec3 sdr_colour_1 = ColourGrade(vec3(red_1, green_1, blue_1)); - const vec3 sdr_linear_0 = ToLinear(sdr_colour_0); - const vec3 sdr_linear_1 = ToLinear(sdr_colour_1); - - const vec3 sdr_constrast_0 = Contrast(sdr_linear_0, sdr_colour_0); - const vec3 sdr_constrast_1 = Contrast(sdr_linear_1, sdr_colour_1); - -#if WHITE_BALANCE_CONTROL - //const vec3 sdr_balanced_0 = WhiteBalance(sdr_constrast_0, HCRT_WHITE_TEMPERATURE, HCRT_WHITE_TINT); - //const vec3 sdr_balanced_1 = WhiteBalance(sdr_constrast_1, HCRT_WHITE_TEMPERATURE, HCRT_WHITE_TINT); -#else - const vec3 sdr_balanced_0 = sdr_constrast_0; - const vec3 sdr_balanced_1 = sdr_constrast_1; -#endif // WHITE_BALANCE_CONTROL - - // HACK: To get maximum brightness we just set paper white luminance to max luminance - const vec3 hdr_colour_0 = InverseTonemapConditional(sdr_balanced_0); - const vec3 hdr_colour_1 = InverseTonemapConditional(sdr_balanced_1); + const vec3 hdr_colour_0 = InverseTonemapConditional(sdr_colour_0); + const vec3 hdr_colour_1 = InverseTonemapConditional(sdr_colour_1); /* Horizontal interpolation between pixels */ - const vec3 horiz_interp = vec3(Bezier(narrowed_source_pixel_offset.x, RedBeamControlPoints(sdr_linear_0.x > sdr_linear_1.x)), - Bezier(narrowed_source_pixel_offset.y, GreenBeamControlPoints(sdr_linear_0.y > sdr_linear_1.y)), - Bezier(narrowed_source_pixel_offset.z, BlueBeamControlPoints(sdr_linear_0.z > sdr_linear_1.z))); + const vec3 horiz_interp = vec3(Bezier(narrowed_source_pixel_offset.x, RedBeamControlPoints(sdr_colour_0.x > sdr_colour_1.x)), + Bezier(narrowed_source_pixel_offset.y, GreenBeamControlPoints(sdr_colour_0.y > sdr_colour_1.y)), + Bezier(narrowed_source_pixel_offset.z, BlueBeamControlPoints(sdr_colour_0.z > sdr_colour_1.z))); const vec3 hdr_colour = mix(hdr_colour_0, hdr_colour_1, horiz_interp); - const vec3 sdr_colour = mix(sdr_linear_0, sdr_linear_1, horiz_interp); + const vec3 sdr_colour = mix(sdr_colour_0, sdr_colour_1, horiz_interp); const float red_scanline_distance = clamp(scanline_distance.x / ((sdr_colour.r * (HCRT_RED_SCANLINE_MAX - HCRT_RED_SCANLINE_MIN)) + HCRT_RED_SCANLINE_MIN), 0.0f, 1.0f); const float green_scanline_distance = clamp(scanline_distance.y / ((sdr_colour.g * (HCRT_GREEN_SCANLINE_MAX - HCRT_GREEN_SCANLINE_MIN)) + HCRT_GREEN_SCANLINE_MIN), 0.0f, 1.0f); @@ -176,5 +138,5 @@ vec3 GenerateScanline(const vec2 source_size) scanline_colour1 = ScanlineColour(source_size, source_tex_coord_x, narrowed_source_pixel_offset, next_prev); } - return scanline_colour0 * HCRT_BRIGHTNESS + scanline_colour1; + return scanline_colour0 + scanline_colour1; } \ No newline at end of file