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Commit eb1a213d authored by Dogway's avatar Dogway
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grade.slang - gamma and temperature rework

parent 6e1c59f4
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misc/grade.slang
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......@@ -3,8 +3,8 @@
layout(push_constant) uniform Push
{
float g_gamma_in;
float g_gamma_out;
float g_signal_type;
float g_gamma_type;
float g_crtgamut;
float g_space_out;
float g_hue_degrees;
......@@ -56,9 +56,9 @@ layout(std140, set = 0, binding = 0) uniform UBO
/*
Grade
> Ubershader grouping some monolithic color related shaders:
::color-mangler (hunterk), ntsc color tuning knobs (Doriphor), RA Reshade LUT.
::color-mangler (hunterk), ntsc color tuning knobs (Doriphor), white_point (hunterk, Dogway), RA Reshade LUT.
> and the addition of:
::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.
::analogue color emulation, phosphor gamut, color space + TRC support, vibrance, HUE vs SAT, vignette (shared by Syh), black level, rolled gain and sigmoidal contrast.
Author: Dogway
License: Public domain
......@@ -72,7 +72,7 @@ layout(std140, set = 0, binding = 0) uniform UBO
### ###
### PAL ###
### Phosphor: EBU (#3) (or an EBU T3213 based CRT phosphor gamut) ###
### WP: D65 (6489K) (in practice more like ~7500K) ###
### WP: D65 (6504K) (in practice more like ~7500K) ###
### TRC: 2.8 SMPTE-C Gamma ###
### Saturation: -0.02 ###
### ###
......@@ -95,9 +95,9 @@ layout(std140, set = 0, binding = 0) uniform UBO
*/
#pragma parameter g_gamma_in "CRT Gamma" 2.40 1.80 3.0 0.05
#pragma parameter g_gamma_in "Game Embedded Gamma" 2.222 1.80 3.0 0.05
#pragma parameter g_gamma_out "CRT Electron Gun Gamma" 2.50 1.80 3.0 0.05
#pragma parameter g_signal_type "Signal Type (0:RGB 1:Composite)" 1.0 0.0 1.0 1.0
#pragma parameter g_gamma_type "Signal Gamma Type (0:sRGB 1:SMPTE-C)" 1.0 0.0 1.0 1.0
#pragma parameter g_crtgamut "Phosphor (1:NTSC-U 2:NTSC-J 3:PAL)" 2.0 -4.0 3.0 1.0
#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
......@@ -139,8 +139,8 @@ layout(std140, set = 0, binding = 0) uniform UBO
#define M_PI 3.1415926535897932384626433832795
#define gamma_in params.g_gamma_in
#define gamma_out params.g_gamma_out
#define signal params.g_signal_type
#define gamma_type params.g_gamma_type
#define crtgamut params.g_crtgamut
#define SPC params.g_space_out
#define hue_degrees params.g_hue_degrees
......@@ -217,7 +217,7 @@ vec3 XYZ_to_RGB(vec3 XYZ, float CSPC){
-0.35566213726997375, 1.61647748947143550, -0.042776308953762054,
-0.25336012244224550, 0.01576850563287735, 0.942228555679321300);
// from AdobeRGB
// to AdobeRGB
const mat3x3 Adobe = mat3x3(
2.0415899753570557, -0.96924000978469850, 0.013439999893307686,
-0.5650100111961365, 1.87597000598907470, -0.118359997868537900,
......@@ -275,11 +275,11 @@ vec3 YxytoXYZ(vec3 Yxy){
///////////////////////// White Point Mapping /////////////////////////
//
//
// PAL: D65 NTSC-U: D65 NTSC-J: CCT NTSC-J NTSC-FCC: C
// PAL: 6489K NTSC-U: 6504K NTSC-J: 8942K NTSC-FCC: 6780K
// 0.313 0.329 0.3127 0.3290 0.281 0.311 0.310, 0.316
// PAL: D65 NTSC-U: D65 NTSC-J: CCT NTSC-J NTSC-FCC: C
// PAL: 6504K NTSC-U: 6504K NTSC-J: 8942K NTSC-FCC: 6780K
// 0.3127 0.3290 0.3127 0.3290 0.281 0.311 0.310 0.316
vec3 wp_adjust(float temperature){
vec3 wp_adjust(float temperature, vec3 color){
float temp3 = pow(10.,3.) / temperature;
float temp6 = pow(10.,6.) / pow(temperature, 2.);
......@@ -293,7 +293,15 @@ vec3 wp_adjust(float temperature){
wp.y = -3.000 * pow(wp.x,2.) + 2.870 * wp.x - 0.275;
wp.z = 1. - wp.x - wp.y;
return wp.xyz;
const mat3x3 CAT02 = mat3x3(
0.7328, 0.4296, -0.1624,
-0.70360, 1.6975, 0.0061,
0.003, -0.0136, 0.9834);
vec3 fw_trans = (vec3(wp.x/wp.y,1.,wp.z/wp.y) * CAT02) / (vec3(0.95045,1.,1.088917) * CAT02) ;
return color.xyz * fw_trans.xyz ;
}
////////////////////////////////////////////////////////////////////////////////
......@@ -621,29 +629,6 @@ mat3(
//*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
const mat3 C_D65_Brad =
mat3(
1.0062731504440308000, 0.0028941007331013680, -0.0070838485844433310,
0.0036507491022348404, 0.9992200732231140000, -0.0023814644664525986,
-0.0013438384048640728, 0.0022154981270432472, 0.9643852710723877000);
const mat3 D93_D65_Brad =
mat3(
1.074299335479736300, 0.03572637960314751, -0.042645290493965150,
0.050180613994598390, 0.97543668746948240, -0.015837108716368675,
-0.006000521592795849, 0.00851820595562458, 0.827671706676483200);
const mat3 PAL_D65_Brad =
mat3(
0.99919301271438600000, -0.00044559128582477570, 0.00027090078219771385,
-0.00065565120894461870, 1.00049483776092530000, 0.00011852011084556580,
1.3149343430995941e-05, 3.4691765904426575e-06, 1.00069344043731700000);
//----------------------------------------------------------------------
// ITU-R BT.470/601 (M) (proof of concept, actually never used)
// SMPTE 170M-1999
// NTSC-FCC 1953 Standard Phosphor (use with temperature C: 6780K)
......@@ -677,7 +662,7 @@ mat3(
0.1799621731042862, 0.07518967241048813, 0.977465748786926300);
// SMPTE RP 145-1994 (SMPTE-C), 170M-1999
// SMPTE-C - Standard Phosphor
// SMPTE-C - Standard Phosphor (Rec.601 NTSC)
const mat3 SMPTE_transform =
mat3(
0.39354196190834045, 0.21238772571086884, 0.01874009333550930,
......@@ -685,7 +670,7 @@ mat3(
0.19164848327636720, 0.08655092865228653, 0.95824241638183590);
// SMPTE RP 145-1994 (SMPTE-C), 170M-1999
// NTSC-J - Standard Phosphor (use with D93 white point)
// 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,
......@@ -693,7 +678,7 @@ mat3(
0.24496731162071228, 0.10153251141309738, 1.26512730121612550);
// ITU-R BT.470/601 (B/G)
// EBU Tech.3213 PAL - Standard Phosphor for Studio Monitors
// EBU Tech.3213-E PAL - Standard Phosphor for Studio Monitors
const mat3 EBU_transform =
mat3(
0.43194326758384705, 0.22272075712680817, 0.020247340202331543,
......@@ -715,22 +700,15 @@ void main()
// Retro Sega Systems: Genesis, 32x, CD and Saturn 2D had color palettes designed in TV levels to save on transformations.
float lum_exp = (lum_fix == 1.0) ? (255./239.) : 1.;
vec3 src = texture(Source, vTexCoord.xy).rgb;
src = (signal == 0.0) ? moncurve_f_f3(src * lum_exp, 2.40, 0.055) : \
moncurve_f_f3(src, 2.40, 0.055) ;
// CRT Gamma: SMPTE-C gamma at 2.222 approximates to a power law gamma of 2.0
vec3 gamma_fix = (gamma_type == 1.0) ? moncurve_r_f3(src, gamma_in + 0.0222, 0.099) : \
moncurve_r_f3(src, gamma_in - 0.1222, 0.055) ;
vec3 col = gamma_fix;
vec3 src = texture(Source, vTexCoord.xy).rgb * lum_exp;
// Assumes framebuffer in Rec.601 with baked gamma
// make a YUV * NTSC Phosphor option too and a FCC * NTSC phosphor
col = (crtgamut == 3.0) ? r601_YUV(col*lum_exp) : \
(crtgamut == 2.0) ? RGB_YIQ(col*lum_exp) : \
(crtgamut == -3.0) ? RGB_FCC(col*lum_exp) : \
(crtgamut == -4.0) ? RGB_FCC(col*lum_exp) : \
RGB_YIQ(col*lum_exp) ;
vec3 col = (crtgamut == 3.0) ? r601_YUV(src) : \
(crtgamut == 2.0) ? RGB_YIQ(src) : \
(crtgamut == -3.0) ? RGB_FCC(src) : \
(crtgamut == -4.0) ? RGB_FCC(src) : \
RGB_YIQ(src) ;
// Clipping Logic / Gamut Limiting
......@@ -773,37 +751,77 @@ void main()
YIQ_RGB(col) ;
// Gamut Limiting
col = r601_YCC(clamp(col, 0.0, 1.0));
col = (signal == 0.0) ? gamma_fix : YCC_r601(clamp(col, vec3(0.0, -.886,-.700), vec3(1.0, .886,.700)));
col = r601_YCC(clamp(col, 0., 1.));
col = (signal == 0.0) ? src : YCC_r601(clamp(col, vec3(0.0, -.886,-.700), vec3(1.0, .886,.700)));
//_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
// \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \
// Look LUT - (in sRGB space)
float red = (col.r * (global.LUT_Size1 - 1.0) + 0.4999) / (global.LUT_Size1 * global.LUT_Size1);
float green = (col.g * (global.LUT_Size1 - 1.0) + 0.4999) / global.LUT_Size1;
float blue1 = (floor(col.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float blue2 = (ceil(col.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float mixer = clamp(max((col.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
// Developer baked CRT gamma (2.20 - 2.25)
col = moncurve_f_f3(col, gamma_in, 0.099);
// CRT Phosphor Gamut
mat3 m_in;
if (crtgamut == -4.0) { m_in = NTSC_FCC_transform; } else
if (crtgamut == -3.0) { m_in = Conrac_transform; } else
if (crtgamut == -2.0) { m_in = Sony20_20_transform; } else
if (crtgamut == -1.0) { m_in = SMPTE_transform; } else
if (crtgamut == 1.0) { m_in = P22_transform; } else
if (crtgamut == 2.0) { m_in = NTSC_J_transform; } else
if (crtgamut == 3.0) { m_in = EBU_transform; }
vec3 gamut = m_in*col;
// White Point Mapping
vec3 wp = (crtgamut == -4.0) ? wp_adjust(global.wp_temperature - (6404. - 6504.), gamut) : \
(crtgamut == -3.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
(crtgamut == -2.0) ? wp_adjust(global.wp_temperature - (7600. - 6504.), gamut) : \
(crtgamut == -1.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
(crtgamut == 1.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
(crtgamut == 2.0) ? wp_adjust(global.wp_temperature - (7400. - 6504.), gamut) : \
(crtgamut == 3.0) ? wp_adjust(global.wp_temperature - (6504. - 6504.), gamut) : \
wp_adjust(global.wp_temperature, gamut) ;
vec3 adj = clamp(XYZ_to_RGB(wp, SPC), 0., 1.);
// Guest Emulated CRT Electron Gun gamma (2.35 - 2.50) (phosphor gamma brings it up back to ~2.222)
adj = moncurve_r_f3(crtgamut == 0.0 ? col : adj, pow(gamma_in, 2.) / gamma_out, 0.099);
// Look LUT - (in SPC space)
float red = (adj.r * (global.LUT_Size1 - 1.0) + 0.4999) / (global.LUT_Size1 * global.LUT_Size1);
float green = (adj.g * (global.LUT_Size1 - 1.0) + 0.4999) / global.LUT_Size1;
float blue1 = (floor(adj.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float blue2 = (ceil(adj.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float mixer = clamp(max((adj.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
vec3 color1 = texture(SamplerLUT1, vec2(blue1, green)).rgb;
vec3 color2 = texture(SamplerLUT1, vec2(blue2, green)).rgb;
vec3 vcolor = (global.LUT1_toggle == 0.0) ? col : mixfix(color1, color2, mixer);
vec3 vcolor = (global.LUT1_toggle == 0.0) ? adj : mixfix(color1, color2, mixer);
// OETF - Opto-Electronic Transfer Function (Rec.709 does a Dim to Dark Surround adaptation)
vcolor = (SPC == 3.0) ? clamp(pow(vcolor, vec3(563./256.)), 0., 1.) : \
(SPC == 2.0) ? moncurve_f_f3(vcolor, 2.20 + 0.022222, 0.0993) : \
(SPC == 1.0) ? clamp(pow(vcolor, vec3(2.20 + 0.40)), 0., 1.) : \
(SPC == 0.0) ? moncurve_f_f3(vcolor, 2.20 + 0.20, 0.0550) : \
clamp(pow(pow(vcolor, vec3(1./1.019264)), vec3(2.20 + 0.20)), 0., 1.) ;
// OETF - Opto-Electronic Transfer Function (to linear in Digital Terms)
vcolor = moncurve_f_f3(vcolor, 2.20 + 0.20, 0.055);
vcolor = RGB_to_XYZ(vcolor, 0.);
vcolor = RGB_to_XYZ(vcolor, SPC);
// Sigmoidal Contrast
vec3 Yxy = XYZtoYxy(vcolor);
float toGamma = clamp(moncurve_r(Yxy.r, 2.40, 0.055), 0.0, 1.0);
float toGamma = clamp(moncurve_r(Yxy.r, 2.40, 0.055), 0., 1.);
toGamma = (Yxy.r > 0.5) ? contrast_sigmoid_inv(toGamma, 2.3, 0.5) : toGamma;
float sigmoid = (cntrst > 0.0) ? contrast_sigmoid(toGamma, cntrst, mid) : contrast_sigmoid_inv(toGamma, cntrst, mid);
vec3 contrast = vec3(moncurve_f(sigmoid, 2.40, 0.055), Yxy.g, Yxy.b);
vec3 XYZsrgb = clamp(XYZ_to_RGB(YxytoXYZ(contrast), SPC), 0.0, 1.0);
vec3 XYZsrgb = clamp(XYZ_to_RGB(YxytoXYZ(contrast), SPC), 0., 1.);
contrast = (cntrst == 0.0) ? XYZ_to_RGB(vcolor, SPC) : XYZsrgb;
......@@ -840,7 +858,7 @@ void main()
(1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z + sat);
screen = clamp(rolled_gain_v4(screen, clamp(lum, -0.49,0.99)), 0.0, 1.0);
screen = clamp(rolled_gain_v4(screen, clamp(lum, -0.49, 0.99)), 0., 1.);
screen = color * screen;
// HUE vs SAT
......@@ -854,58 +872,30 @@ void main()
float hue_at = atan(src_h.z, src_h.y);
chroma = sqrt(src_h.z * src_h.z + src_h.y * src_h.y);
// red -40 green 230 blue 100
float hue_radians_r = -40.0 * (M_PI / 180.0);
float hue_r = clamp(chroma * cos(hue_at + hue_radians_r) * 2., 0.0, 1.0);
float hue_r = chroma * cos(hue_at + hue_radians_r) * 2.;
float hue_radians_g = 230.0 * (M_PI / 180.0);
float hue_g = clamp(chroma * cos(hue_at + hue_radians_g) * 2., 0.0, 1.0);
float hue_g = chroma * cos(hue_at + hue_radians_g) * 2.;
float hue_radians_b = 100.0 * (M_PI / 180.0);
float hue_b = clamp(chroma * cos(hue_at + hue_radians_b) * 2., 0.0, 1.0);
float hue_b = chroma * cos(hue_at + hue_radians_b) * 2.;
float msk = dot(vec3(hue_r, hue_g, hue_b), vec3(satr, satg, satb)*(-1.));
float msk = dot(clamp(vec3(hue_r, hue_g, hue_b), 0., 1.), vec3(satr, satg, satb)*(-1.));
src_h = mixfix(screen.rgb, vec3(dot(coeff, screen.rgb)), msk);
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) : \
clamp(1.0 - (SatMask(src_h.x, src_h.y, src_h.z) * vibr), 0.0, 1.0) ;
src_h = mixfix(src_h, clamp(adjust * src_h, 0.0, 1.0), sat_msk);
float sat_msk = (vibr < 0.0) ? 1.0 - abs(SatMask(src_h.x, src_h.y, src_h.z) - 1.0) * abs(vibr) : \
1.0 - (SatMask(src_h.x, src_h.y, src_h.z) * vibr) ;
// CRT Phosphor Gamut
mat3 m_in;
if (crtgamut == -4.0) { m_in = NTSC_FCC_transform; } else
if (crtgamut == -3.0) { m_in = Conrac_transform; } else
if (crtgamut == -2.0) { m_in = Sony20_20_transform; } else
if (crtgamut == -1.0) { m_in = SMPTE_transform; } else
if (crtgamut == 1.0) { m_in = P22_transform; } else
if (crtgamut == 2.0) { m_in = NTSC_J_transform; } else
if (crtgamut == 3.0) { m_in = EBU_transform; }
vec3 gamut = (crtgamut == -4.0) ? (m_in*src_h)*C_D65_Brad : \
(crtgamut == -3.0) ? (m_in*src_h)*C_D65_Brad : \
(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)
......
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