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https://github.com/italicsjenga/slang-shaders.git
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Merge pull request #162 from Dogway/master
grade.slang - gamma and temperature rework
This commit is contained in:
hizzlekizzle
GitHub
commit
59ffdd7133
206
misc/grade.slang
206
misc/grade.slang
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@ -3,8 +3,8 @@
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layout(push_constant) uniform Push
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{
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float g_gamma_in;
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float g_gamma_out;
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float g_signal_type;
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float g_gamma_type;
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float g_crtgamut;
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float g_space_out;
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float g_hue_degrees;
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@ -56,9 +56,9 @@ layout(std140, set = 0, binding = 0) uniform UBO
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/*
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Grade
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> Ubershader grouping some monolithic color related shaders:
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::color-mangler (hunterk), ntsc color tuning knobs (Doriphor), RA Reshade LUT.
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::color-mangler (hunterk), ntsc color tuning knobs (Doriphor), white_point (hunterk, Dogway), RA Reshade LUT.
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> and the addition of:
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::analogue color emulation, phosphor gamut, color space + TRC support, vibrance, HUE vs SAT, temperature, vignette (shared by Syh), black level, rolled gain and sigmoidal contrast.
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::analogue color emulation, phosphor gamut, color space + TRC support, vibrance, HUE vs SAT, vignette (shared by Syh), black level, rolled gain and sigmoidal contrast.
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Author: Dogway
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License: Public domain
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@ -72,7 +72,7 @@ layout(std140, set = 0, binding = 0) uniform UBO
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### ###
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### PAL ###
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### Phosphor: EBU (#3) (or an EBU T3213 based CRT phosphor gamut) ###
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### WP: D65 (6489K) (in practice more like ~7500K) ###
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### WP: D65 (6504K) (in practice more like ~7500K) ###
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### TRC: 2.8 SMPTE-C Gamma ###
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### Saturation: -0.02 ###
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### ###
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@ -95,9 +95,9 @@ layout(std140, set = 0, binding = 0) uniform UBO
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*/
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#pragma parameter g_gamma_in "CRT Gamma" 2.40 1.80 3.0 0.05
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#pragma parameter g_gamma_in "Game Embedded Gamma" 2.222 1.80 3.0 0.05
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#pragma parameter g_gamma_out "CRT Electron Gun Gamma" 2.50 1.80 3.0 0.05
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#pragma parameter g_signal_type "Signal Type (0:RGB 1:Composite)" 1.0 0.0 1.0 1.0
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#pragma parameter g_gamma_type "Signal Gamma Type (0:sRGB 1:SMPTE-C)" 1.0 0.0 1.0 1.0
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#pragma parameter g_crtgamut "Phosphor (1:NTSC-U 2:NTSC-J 3:PAL)" 2.0 -4.0 3.0 1.0
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#pragma parameter g_space_out "Diplay Color Space (-1:709 0:sRGB 1:DCI 2:2020 3:Adobe)" 0.0 -1.0 3.0 1.0
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@ -139,8 +139,8 @@ layout(std140, set = 0, binding = 0) uniform UBO
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#define M_PI 3.1415926535897932384626433832795
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#define gamma_in params.g_gamma_in
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#define gamma_out params.g_gamma_out
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#define signal params.g_signal_type
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#define gamma_type params.g_gamma_type
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#define crtgamut params.g_crtgamut
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#define SPC params.g_space_out
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#define hue_degrees params.g_hue_degrees
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@ -217,7 +217,7 @@ vec3 XYZ_to_RGB(vec3 XYZ, float CSPC){
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-0.35566213726997375, 1.61647748947143550, -0.042776308953762054,
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-0.25336012244224550, 0.01576850563287735, 0.942228555679321300);
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// from AdobeRGB
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// to AdobeRGB
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const mat3x3 Adobe = mat3x3(
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2.0415899753570557, -0.96924000978469850, 0.013439999893307686,
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-0.5650100111961365, 1.87597000598907470, -0.118359997868537900,
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@ -275,11 +275,11 @@ vec3 YxytoXYZ(vec3 Yxy){
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///////////////////////// White Point Mapping /////////////////////////
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//
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//
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// PAL: D65 NTSC-U: D65 NTSC-J: CCT NTSC-J NTSC-FCC: C
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// PAL: 6489K NTSC-U: 6504K NTSC-J: 8942K NTSC-FCC: 6780K
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// 0.313 0.329 0.3127 0.3290 0.281 0.311 0.310, 0.316
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// PAL: D65 NTSC-U: D65 NTSC-J: CCT NTSC-J NTSC-FCC: C
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// PAL: 6504K NTSC-U: 6504K NTSC-J: 8942K NTSC-FCC: 6780K
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// 0.3127 0.3290 0.3127 0.3290 0.281 0.311 0.310 0.316
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vec3 wp_adjust(float temperature){
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vec3 wp_adjust(float temperature, vec3 color){
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float temp3 = pow(10.,3.) / temperature;
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float temp6 = pow(10.,6.) / pow(temperature, 2.);
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@ -293,7 +293,15 @@ vec3 wp_adjust(float temperature){
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wp.y = -3.000 * pow(wp.x,2.) + 2.870 * wp.x - 0.275;
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wp.z = 1. - wp.x - wp.y;
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return wp.xyz;
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const mat3x3 CAT02 = mat3x3(
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0.7328, 0.4296, -0.1624,
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-0.70360, 1.6975, 0.0061,
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0.003, -0.0136, 0.9834);
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vec3 fw_trans = (vec3(wp.x/wp.y,1.,wp.z/wp.y) * CAT02) / (vec3(0.95045,1.,1.088917) * CAT02) ;
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return color.xyz * fw_trans.xyz ;
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}
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////////////////////////////////////////////////////////////////////////////////
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@ -621,29 +629,6 @@ mat3(
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//*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
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const mat3 C_D65_Brad =
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mat3(
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1.0062731504440308000, 0.0028941007331013680, -0.0070838485844433310,
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0.0036507491022348404, 0.9992200732231140000, -0.0023814644664525986,
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-0.0013438384048640728, 0.0022154981270432472, 0.9643852710723877000);
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const mat3 D93_D65_Brad =
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mat3(
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1.074299335479736300, 0.03572637960314751, -0.042645290493965150,
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0.050180613994598390, 0.97543668746948240, -0.015837108716368675,
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-0.006000521592795849, 0.00851820595562458, 0.827671706676483200);
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const mat3 PAL_D65_Brad =
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mat3(
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0.99919301271438600000, -0.00044559128582477570, 0.00027090078219771385,
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-0.00065565120894461870, 1.00049483776092530000, 0.00011852011084556580,
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1.3149343430995941e-05, 3.4691765904426575e-06, 1.00069344043731700000);
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//----------------------------------------------------------------------
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// ITU-R BT.470/601 (M) (proof of concept, actually never used)
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// SMPTE 170M-1999
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// NTSC-FCC 1953 Standard Phosphor (use with temperature C: 6780K)
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@ -677,7 +662,7 @@ mat3(
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0.1799621731042862, 0.07518967241048813, 0.977465748786926300);
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// SMPTE RP 145-1994 (SMPTE-C), 170M-1999
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// SMPTE-C - Standard Phosphor
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// SMPTE-C - Standard Phosphor (Rec.601 NTSC)
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const mat3 SMPTE_transform =
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mat3(
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0.39354196190834045, 0.21238772571086884, 0.01874009333550930,
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@ -685,7 +670,7 @@ mat3(
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0.19164848327636720, 0.08655092865228653, 0.95824241638183590);
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// SMPTE RP 145-1994 (SMPTE-C), 170M-1999
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// NTSC-J - Standard Phosphor (use with D93 white point)
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// NTSC-J - Standard Phosphor (https://web.archive.org/web/20130413104152/http://arib.or.jp/english/html/overview/doc/4-TR-B09v1_0.pdf)
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const mat3 NTSC_J_transform =
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mat3(
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0.39603787660598755, 0.22429330646991730, 0.02050681784749031,
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@ -693,7 +678,7 @@ mat3(
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0.24496731162071228, 0.10153251141309738, 1.26512730121612550);
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// ITU-R BT.470/601 (B/G)
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// EBU Tech.3213 PAL - Standard Phosphor for Studio Monitors
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// EBU Tech.3213-E PAL - Standard Phosphor for Studio Monitors
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const mat3 EBU_transform =
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mat3(
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0.43194326758384705, 0.22272075712680817, 0.020247340202331543,
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@ -715,22 +700,15 @@ void main()
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// Retro Sega Systems: Genesis, 32x, CD and Saturn 2D had color palettes designed in TV levels to save on transformations.
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float lum_exp = (lum_fix == 1.0) ? (255./239.) : 1.;
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vec3 src = texture(Source, vTexCoord.xy).rgb;
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src = (signal == 0.0) ? moncurve_f_f3(src * lum_exp, 2.40, 0.055) : \
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moncurve_f_f3(src, 2.40, 0.055) ;
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// CRT Gamma: SMPTE-C gamma at 2.222 approximates to a power law gamma of 2.0
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vec3 gamma_fix = (gamma_type == 1.0) ? moncurve_r_f3(src, gamma_in + 0.0222, 0.099) : \
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moncurve_r_f3(src, gamma_in - 0.1222, 0.055) ;
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vec3 col = gamma_fix;
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vec3 src = texture(Source, vTexCoord.xy).rgb * lum_exp;
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// Assumes framebuffer in Rec.601 with baked gamma
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// make a YUV * NTSC Phosphor option too and a FCC * NTSC phosphor
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col = (crtgamut == 3.0) ? r601_YUV(col*lum_exp) : \
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(crtgamut == 2.0) ? RGB_YIQ(col*lum_exp) : \
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(crtgamut == -3.0) ? RGB_FCC(col*lum_exp) : \
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(crtgamut == -4.0) ? RGB_FCC(col*lum_exp) : \
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RGB_YIQ(col*lum_exp) ;
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vec3 col = (crtgamut == 3.0) ? r601_YUV(src) : \
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(crtgamut == 2.0) ? RGB_YIQ(src) : \
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(crtgamut == -3.0) ? RGB_FCC(src) : \
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(crtgamut == -4.0) ? RGB_FCC(src) : \
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RGB_YIQ(src) ;
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// Clipping Logic / Gamut Limiting
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@ -773,37 +751,77 @@ void main()
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YIQ_RGB(col) ;
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// Gamut Limiting
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col = r601_YCC(clamp(col, 0.0, 1.0));
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col = (signal == 0.0) ? gamma_fix : YCC_r601(clamp(col, vec3(0.0, -.886,-.700), vec3(1.0, .886,.700)));
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col = r601_YCC(clamp(col, 0., 1.));
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col = (signal == 0.0) ? src : YCC_r601(clamp(col, vec3(0.0, -.886,-.700), vec3(1.0, .886,.700)));
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//_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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// \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \
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// Look LUT - (in sRGB space)
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float red = (col.r * (global.LUT_Size1 - 1.0) + 0.4999) / (global.LUT_Size1 * global.LUT_Size1);
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float green = (col.g * (global.LUT_Size1 - 1.0) + 0.4999) / global.LUT_Size1;
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float blue1 = (floor(col.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
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float blue2 = (ceil(col.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
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float mixer = clamp(max((col.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
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// Developer baked CRT gamma (2.20 - 2.25)
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col = moncurve_f_f3(col, gamma_in, 0.099);
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// CRT Phosphor Gamut
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mat3 m_in;
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if (crtgamut == -4.0) { m_in = NTSC_FCC_transform; } else
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if (crtgamut == -3.0) { m_in = Conrac_transform; } else
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if (crtgamut == -2.0) { m_in = Sony20_20_transform; } else
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if (crtgamut == -1.0) { m_in = SMPTE_transform; } else
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if (crtgamut == 1.0) { m_in = P22_transform; } else
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if (crtgamut == 2.0) { m_in = NTSC_J_transform; } else
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if (crtgamut == 3.0) { m_in = EBU_transform; }
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vec3 gamut = m_in*col;
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// White Point Mapping
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vec3 wp = (crtgamut == -4.0) ? wp_adjust(global.wp_temperature - (6404. - 6504.), gamut) : \
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(crtgamut == -3.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
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(crtgamut == -2.0) ? wp_adjust(global.wp_temperature - (7600. - 6504.), gamut) : \
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(crtgamut == -1.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
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(crtgamut == 1.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
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(crtgamut == 2.0) ? wp_adjust(global.wp_temperature - (7400. - 6504.), gamut) : \
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(crtgamut == 3.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
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wp_adjust(global.wp_temperature, gamut) ;
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vec3 adj = clamp(XYZ_to_RGB(wp, SPC), 0., 1.);
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// Guest Emulated CRT Electron Gun gamma (2.35 - 2.50) (phosphor gamma brings it up back to ~2.222)
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adj = moncurve_r_f3(crtgamut == 0.0 ? col : adj, pow(gamma_in, 2.) / gamma_out, 0.099);
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// Look LUT - (in SPC space)
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float red = (adj.r * (global.LUT_Size1 - 1.0) + 0.4999) / (global.LUT_Size1 * global.LUT_Size1);
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float green = (adj.g * (global.LUT_Size1 - 1.0) + 0.4999) / global.LUT_Size1;
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float blue1 = (floor(adj.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
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float blue2 = (ceil(adj.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
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float mixer = clamp(max((adj.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
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vec3 color1 = texture(SamplerLUT1, vec2(blue1, green)).rgb;
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vec3 color2 = texture(SamplerLUT1, vec2(blue2, green)).rgb;
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vec3 vcolor = (global.LUT1_toggle == 0.0) ? col : mixfix(color1, color2, mixer);
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vec3 vcolor = (global.LUT1_toggle == 0.0) ? adj : mixfix(color1, color2, mixer);
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// OETF - Opto-Electronic Transfer Function (to linear in Digital Terms)
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vcolor = moncurve_f_f3(vcolor, 2.20 + 0.20, 0.055);
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vcolor = RGB_to_XYZ(vcolor, 0.);
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// OETF - Opto-Electronic Transfer Function (Rec.709 does a Dim to Dark Surround adaptation)
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vcolor = (SPC == 3.0) ? clamp(pow(vcolor, vec3(563./256.)), 0., 1.) : \
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(SPC == 2.0) ? moncurve_f_f3(vcolor, 2.20 + 0.022222, 0.0993) : \
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(SPC == 1.0) ? clamp(pow(vcolor, vec3(2.20 + 0.40)), 0., 1.) : \
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(SPC == 0.0) ? moncurve_f_f3(vcolor, 2.20 + 0.20, 0.0550) : \
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clamp(pow(pow(vcolor, vec3(1./1.019264)), vec3(2.20 + 0.20)), 0., 1.) ;
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vcolor = RGB_to_XYZ(vcolor, SPC);
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// Sigmoidal Contrast
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vec3 Yxy = XYZtoYxy(vcolor);
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float toGamma = clamp(moncurve_r(Yxy.r, 2.40, 0.055), 0.0, 1.0);
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float toGamma = clamp(moncurve_r(Yxy.r, 2.40, 0.055), 0., 1.);
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toGamma = (Yxy.r > 0.5) ? contrast_sigmoid_inv(toGamma, 2.3, 0.5) : toGamma;
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float sigmoid = (cntrst > 0.0) ? contrast_sigmoid(toGamma, cntrst, mid) : contrast_sigmoid_inv(toGamma, cntrst, mid);
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vec3 contrast = vec3(moncurve_f(sigmoid, 2.40, 0.055), Yxy.g, Yxy.b);
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vec3 XYZsrgb = clamp(XYZ_to_RGB(YxytoXYZ(contrast), SPC), 0.0, 1.0);
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vec3 XYZsrgb = clamp(XYZ_to_RGB(YxytoXYZ(contrast), SPC), 0., 1.);
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contrast = (cntrst == 0.0) ? XYZ_to_RGB(vcolor, SPC) : XYZsrgb;
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@ -840,7 +858,7 @@ void main()
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(1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z + sat);
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screen = clamp(rolled_gain_v4(screen, clamp(lum, -0.49,0.99)), 0.0, 1.0);
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screen = clamp(rolled_gain_v4(screen, clamp(lum, -0.49, 0.99)), 0., 1.);
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screen = color * screen;
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// HUE vs SAT
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@ -854,58 +872,30 @@ void main()
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float hue_at = atan(src_h.z, src_h.y);
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chroma = sqrt(src_h.z * src_h.z + src_h.y * src_h.y);
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// red -40º green 230º blue 100º
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float hue_radians_r = -40.0 * (M_PI / 180.0);
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float hue_r = clamp(chroma * cos(hue_at + hue_radians_r) * 2., 0.0, 1.0);
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float hue_r = chroma * cos(hue_at + hue_radians_r) * 2.;
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float hue_radians_g = 230.0 * (M_PI / 180.0);
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float hue_g = clamp(chroma * cos(hue_at + hue_radians_g) * 2., 0.0, 1.0);
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float hue_g = chroma * cos(hue_at + hue_radians_g) * 2.;
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float hue_radians_b = 100.0 * (M_PI / 180.0);
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float hue_b = clamp(chroma * cos(hue_at + hue_radians_b) * 2., 0.0, 1.0);
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float hue_b = chroma * cos(hue_at + hue_radians_b) * 2.;
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float msk = dot(vec3(hue_r, hue_g, hue_b), vec3(satr, satg, satb)*(-1.));
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float msk = dot(clamp(vec3(hue_r, hue_g, hue_b), 0., 1.), vec3(satr, satg, satb)*(-1.));
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src_h = mixfix(screen.rgb, vec3(dot(coeff, screen.rgb)), msk);
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float sat_msk = (vibr < 0.0) ? clamp(1.0 - abs(SatMask(src_h.x, src_h.y, src_h.z) - 1.0) * abs(vibr), 0.0, 1.0) : \
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clamp(1.0 - (SatMask(src_h.x, src_h.y, src_h.z) * vibr), 0.0, 1.0) ;
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float sat_msk = (vibr < 0.0) ? 1.0 - abs(SatMask(src_h.x, src_h.y, src_h.z) - 1.0) * abs(vibr) : \
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1.0 - (SatMask(src_h.x, src_h.y, src_h.z) * vibr) ;
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src_h = mixfix(src_h, clamp(adjust * src_h, 0.0, 1.0), sat_msk);
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// CRT Phosphor Gamut
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mat3 m_in;
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if (crtgamut == -4.0) { m_in = NTSC_FCC_transform; } else
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if (crtgamut == -3.0) { m_in = Conrac_transform; } else
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if (crtgamut == -2.0) { m_in = Sony20_20_transform; } else
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if (crtgamut == -1.0) { m_in = SMPTE_transform; } else
|
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if (crtgamut == 1.0) { m_in = P22_transform; } else
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if (crtgamut == 2.0) { m_in = NTSC_J_transform; } else
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if (crtgamut == 3.0) { m_in = EBU_transform; }
|
||||
|
||||
vec3 gamut = (crtgamut == -4.0) ? (m_in*src_h)*C_D65_Brad : \
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(crtgamut == -3.0) ? (m_in*src_h)*C_D65_Brad : \
|
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(crtgamut == -2.0) ? (m_in*src_h)*D93_D65_Brad : \
|
||||
(crtgamut == 2.0) ? (m_in*src_h)*D93_D65_Brad : \
|
||||
(crtgamut == 3.0) ? (m_in*src_h)*PAL_D65_Brad : \
|
||||
m_in*src_h;
|
||||
|
||||
// White Point Mapping
|
||||
vec3 wp = wp_adjust(global.wp_temperature - 1000.);
|
||||
vec3 base = (crtgamut == 0.0) ? RGB_to_XYZ(src_h, SPC) : gamut;
|
||||
base = XYZtoYxy(base);
|
||||
vec3 adjusted = (crtgamut == 0.0) ? RGB_to_XYZ(src_h, SPC) * wp : gamut * wp;
|
||||
adjusted = XYZtoYxy(adjusted);
|
||||
adjusted = clamp(XYZ_to_RGB(YxytoXYZ(vec3(base.x , adjusted.y , adjusted.z)), SPC), 0.0, 1.0);
|
||||
src_h = mixfix(src_h, clamp(adjust * src_h, 0., 1.), clamp(sat_msk, 0., 1.));
|
||||
|
||||
|
||||
// EOTF - Electro-Optical Transfer Function (Rec.709 does a Dim to Dark Surround adaptation)
|
||||
vec3 TRC = (SPC == 3.0) ? clamp(pow(adjusted, vec3(1./(563./256.))), 0., 1.) : \
|
||||
(SPC == 2.0) ? moncurve_r_f3(adjusted, 2.20 + 0.022222, 0.0993) : \
|
||||
(SPC == 1.0) ? clamp(pow(adjusted, vec3(1./(2.20 + 0.40))), 0., 1.) : \
|
||||
(SPC == 0.0) ? moncurve_r_f3(adjusted, 2.20 + 0.20, 0.0550) : \
|
||||
clamp(pow(pow(adjusted, vec3(1.019264)), vec3(1./(2.20 + 0.20))), 0., 1.) ;
|
||||
vec3 TRC = (SPC == 3.0) ? clamp(pow(src_h, vec3(1./(563./256.))), 0., 1.) : \
|
||||
(SPC == 2.0) ? moncurve_r_f3(src_h, 2.20 + 0.022222, 0.0993) : \
|
||||
(SPC == 1.0) ? clamp(pow(src_h, vec3(1./(2.20 + 0.40))), 0., 1.) : \
|
||||
(SPC == 0.0) ? moncurve_r_f3(src_h, 2.20 + 0.20, 0.0550) : \
|
||||
clamp(pow(pow(src_h, vec3(1.019264)), vec3(1./(2.20 + 0.20))), 0., 1.) ;
|
||||
|
||||
|
||||
// Technical LUT - (in SPC space)
|
||||
|
|
|
|||
Loading…
Reference in a new issue