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update grade.slang (#145)

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* update grade.slang

Gamma pipeline relogic
Fix LUT implementation
Fix rolled_gain function
New otuput space: Rec.709
Fixed some defaults (output space to 4.0, and temperature to D55)

* update.slang

fix back output space default
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Dogway 2020-07-10 17:47:44 +01:00 committed by GitHub
parent e678bc4dc7
commit 8ee69f0a78
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1 changed files with 36 additions and 44 deletions
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misc/grade.slang
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@ -56,7 +56,7 @@ layout(std140, set = 0, binding = 0) uniform UBO
/*
Grade
> Ubershader grouping some monolithic color related shaders:
::color-mangler (hunterk), ntsc color tuning knobs (Doriphor), white_point (hunterk, Dogway), lut_x2 (Guest, Dr. Venom).
::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, vignette (shared by Syh), black level, rolled gain and sigmoidal contrast.
@ -99,7 +99,7 @@ layout(std140, set = 0, binding = 0) uniform UBO
#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 (0:sRGB 1:DCI 2:2020 3:AdobeRGB)" 0.0 0.0 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
#pragma parameter g_hue_degrees "Hue" 0.0 -360.0 360.0 1.0
#pragma parameter g_I_SHIFT "I/U Shift" 0.0 -0.2 0.2 0.01
@ -113,7 +113,7 @@ layout(std140, set = 0, binding = 0) uniform UBO
#pragma parameter g_lum "Brightness" 0.0 -0.5 1.0 0.01
#pragma parameter g_cntrst "Contrast" 0.0 -1.0 1.0 0.05
#pragma parameter g_mid "Contrast Pivot" 0.5 0.0 1.0 0.01
#pragma parameter wp_temperature "White Point" 6505.0 5005.0 12005.0 100.0
#pragma parameter wp_temperature "White Point" 5505.0 5005.0 12005.0 100.0
#pragma parameter g_sat "Saturation" 0.0 -1.0 2.0 0.01
#pragma parameter g_vibr "Dullness/Vibrance" 0.0 -1.0 1.0 0.05
#pragma parameter g_satr "Hue vs Sat Red" 0.0 -1.0 1.0 0.01
@ -394,14 +394,9 @@ float contrast_sigmoid_inv(float color, float cont, float pivot){
float rolled_gain(float color, float gain){
float gx = gain + 1.0;
float ax = (max(0.5 - (gx / 2.0), 0.5));
float cx = (gx > 0.0) ? (1.0 - gx + (gx / 2.0)) : abs(gx) / 2.0;
float gain_plus = ((color * gx) > ax) ? (ax + cx * tanh((color * gx - ax) / cx)) : (color * gx);
float ax_g = 1.0 - abs(gx);
float gain_minus = (color > ax_g) ? (ax_g + cx * tanh((color - ax_g) / cx)) : color;
color = (gx > 0.0) ? gain_plus : gain_minus;
float gx = abs(gain) + 0.001;
float anch = (gain > 0.0) ? 0.5 / (gx / 2.0) : 0.5 / gx;
color = (gain > 0.0) ? color * ((color - anch) / (1 - anch)) : color * ((1 - anch) / (color - anch)) * (1 - gain);
return color;
}
@ -740,7 +735,7 @@ void main()
src = (signal == 0.0) ? moncurve_f_f3(src * lum_exp, 2.40, 0.055) : \
moncurve_f_f3(src, 2.40, 0.055) ;
// SMPTE-C gamma at 2.222 approximates to a power law gamma of 2.0
// 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) ;
@ -802,24 +797,19 @@ void main()
// \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \
// OETF - Opto-Electronic Transfer Function
vec3 imgColor = (SPC == 3.0) ? clamp(pow(col, vec3(563./256.)), 0., 1.) : \
(SPC == 2.0) ? moncurve_f_f3(col, 2.20 + 0.022222, 0.0993) : \
(SPC == 1.0) ? clamp(pow(col, vec3(2.20 + 0.40)), 0., 1.) : \
moncurve_f_f3(col, 2.20 + 0.20, 0.055) ;
// Look LUT - (in sRGB space)
float red = (imgColor.r * (global.LUT_Size1 - 1.0) + 0.4999) / (global.LUT_Size1 * global.LUT_Size1);
float green = (imgColor.g * (global.LUT_Size1 - 1.0) + 0.4999) / global.LUT_Size1;
float blue1 = (floor(imgColor.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float blue2 = (ceil(imgColor.b * (global.LUT_Size1 - 1.0)) / global.LUT_Size1) + red;
float mixer = clamp(max((imgColor.b - blue1) / (blue2 - blue1), 0.0), 0.0, 32.0);
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);
vec3 color1 = texture(SamplerLUT1, vec2(blue1, green)).rgb;
vec3 color2 = texture(SamplerLUT1, vec2(blue2, green)).rgb;
vec3 vcolor = (global.LUT1_toggle == 0.0) ? imgColor : mixfix(color1, color2, mixer);
vec3 vcolor = (global.LUT1_toggle == 0.0) ? col : mixfix(color1, color2, mixer);
// OETF - Opto-Electronic Transfer Function
vcolor = moncurve_f_f3(vcolor, 2.20 + 0.20, 0.055);
vcolor = RGB_to_XYZ(vcolor, 0.);
@ -866,7 +856,7 @@ void main()
(1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z, (1.0 - sat) * coeff.z + sat);
screen = clamp(rolled_gain_v4(screen, lum * 2.0), 0.0, 1.0);
screen = clamp(rolled_gain_v4(screen, clamp(lum, -0.49,0.99)), 0.0, 1.0);
screen = color * screen;
// HUE vs SAT
@ -926,24 +916,26 @@ void main()
adjusted = clamp(XYZ_to_RGB(YxytoXYZ(vec3(base.x , adjusted.y , adjusted.z)), SPC), 0.0, 1.0);
// 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.) ;
// Technical LUT - (in SPC space)
float red_2 = (adjusted.r * (global.LUT_Size2 - 1.0) + 0.4999) / (global.LUT_Size2 * global.LUT_Size2);
float green_2 = (adjusted.g * (global.LUT_Size2 - 1.0) + 0.4999) / global.LUT_Size2;
float blue1_2 = (floor(adjusted.b * (global.LUT_Size2 - 1.0)) / global.LUT_Size2) + red_2;
float blue2_2 = (ceil(adjusted.b * (global.LUT_Size2 - 1.0)) / global.LUT_Size2) + red_2;
float mixer_2 = clamp(max((adjusted.b - blue1_2) / (blue2_2 - blue1_2), 0.0), 0.0, 32.0);
float red_2 = (TRC.r * (global.LUT_Size2 - 1.0) + 0.4999) / (global.LUT_Size2 * global.LUT_Size2);
float green_2 = (TRC.g * (global.LUT_Size2 - 1.0) + 0.4999) / global.LUT_Size2;
float blue1_2 = (floor(TRC.b * (global.LUT_Size2 - 1.0)) / global.LUT_Size2) + red_2;
float blue2_2 = (ceil(TRC.b * (global.LUT_Size2 - 1.0)) / global.LUT_Size2) + red_2;
float mixer_2 = clamp(max((TRC.b - blue1_2) / (blue2_2 - blue1_2), 0.0), 0.0, 32.0);
vec3 color1_2 = texture(SamplerLUT2, vec2(blue1_2, green_2)).rgb;
vec3 color2_2 = texture(SamplerLUT2, vec2(blue2_2, green_2)).rgb;
vec3 LUT2_output = mixfix(color1_2, color2_2, mixer_2);
LUT2_output = (global.LUT2_toggle == 0.0) ? adjusted : LUT2_output;
LUT2_output = (global.LUT2_toggle == 0.0) ? TRC : LUT2_output;
// EOTF - Electro-Optical Transfer Function
vec3 TRC = (SPC == 3.0) ? clamp(pow(LUT2_output, vec3(1./(563./256.))), 0., 1.) : \
(SPC == 2.0) ? moncurve_r_f3(LUT2_output, 2.20 + 0.022222, 0.0993) : \
(SPC == 1.0) ? clamp(pow(LUT2_output, vec3(1./(2.20 + 0.40))), 0., 1.) : \
moncurve_r_f3(LUT2_output, 2.20 + 0.20, 0.0550) ;
FragColor = vec4(TRC, 1.0);
FragColor = vec4(LUT2_output, 1.0);
}