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https://github.com/italicsjenga/slang-shaders.git
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281 lines
8.2 KiB
Plaintext
281 lines
8.2 KiB
Plaintext
#version 450
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/*
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CRT Advanced color altering
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Copyright (C) 2019-2022 guest(r) and Dr. Venom
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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float TNTC;
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float LS;
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float LUTLOW, LUTBR;
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float WP;
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float wp_saturation;
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float BP;
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float vigstr;
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float vigdef;
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float sega_fix;
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float pre_bb;
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float contr;
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} params;
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#pragma parameter bogus_compat "[ COMPATIBILITY AND PERFORMANCE ]:" 0.0 0.0 1.0 1.0
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#pragma parameter fcompat " Compatibility Mode (slower, use if glitchy)" 0.0 0.0 1.0 1.0
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#pragma parameter bogus_color "[ COLOR TWEAKS ]:" 0.0 0.0 1.0 1.0
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#pragma parameter TNTC " LUT Colors: Trin.1 | Trin.2 | Nec Mult. | NTSC" 0.0 0.0 4.0 1.0
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#define TNTC params.TNTC
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#pragma parameter LS " LUT Size" 32.0 32.0 64.0 32.0
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#define LS params.LS
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#define LUTLOW 5.0 // "Fix LUT Dark - Range" from 0.0 to 50.0 - RGB singletons
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#define LUTBR 1.0 // "Fix LUT Brightness" from 0.0 to 1.0
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#pragma parameter WP " Color Temperature %" 0.0 -100.0 100.0 5.0
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#pragma parameter wp_saturation " Saturation Adjustment" 1.0 0.0 2.0 0.05
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#pragma parameter pre_bb " Brightness Adjustment" 1.0 0.0 2.0 0.01
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#pragma parameter contr " Contrast Adjustment" 0.0 -2.0 2.0 0.05
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#pragma parameter sega_fix " Sega Brightness Fix" 0.0 0.0 1.0 1.0
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#pragma parameter BP " Raise Black Level" 0.0 -100.0 25.0 1.0
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#pragma parameter vigstr " Vignette Strength" 0.0 0.0 2.0 0.05
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#pragma parameter vigdef " Vignette Size" 1.0 0.5 3.0 0.10
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#define WP params.WP
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#define wp_saturation params.wp_saturation
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#define BP params.BP
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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#define gl_FragCoord (vTexCoord * params.OutputSize.xy)
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord * 1.00001;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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layout(set = 0, binding = 3) uniform sampler2D SamplerLUT1;
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layout(set = 0, binding = 4) uniform sampler2D SamplerLUT2;
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layout(set = 0, binding = 5) uniform sampler2D SamplerLUT3;
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layout(set = 0, binding = 6) uniform sampler2D SamplerLUT4;
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layout(set = 0, binding = 7) uniform sampler2D OriginalHistory0;
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layout(set = 0, binding = 8) uniform sampler2D OriginalHistory1;
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#define COMPAT_TEXTURE(c,d) texture(c,d)
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// Color profile matrices
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const mat3 ToSRGB =
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mat3(
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3.240970, -0.969244, 0.055630,
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-1.537383, 1.875968, -0.203977,
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-0.498611, 0.041555, 1.056972
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);
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// Color temperature matrices
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const mat3 D65_to_D55 = mat3 (
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0.4850339153, 0.2500956126, 0.0227359648,
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0.3488957224, 0.6977914447, 0.1162985741,
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0.1302823568, 0.0521129427, 0.6861537456);
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const mat3 D65_to_D93 = mat3 (
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0.3412754080, 0.1759701322, 0.0159972847,
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0.3646170520, 0.7292341040, 0.1215390173,
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0.2369894093, 0.0947957637, 1.2481442225);
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vec3 fix_lut(vec3 lutcolor, vec3 ref)
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{
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float r = length(ref);
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float l = length(lutcolor);
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float m = max(max(ref.r,ref.g),ref.b);
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ref = normalize(lutcolor + 0.0000001) * mix(r, l, pow(m,1.25));
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return mix(lutcolor, ref, LUTBR);
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}
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float vignette(vec2 pos) {
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vec2 b = vec2(params.vigdef, params.vigdef) * vec2(1.0, params.OriginalSize.x/params.OriginalSize.y) * 0.125;
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pos = clamp(pos, 0.0, 1.0);
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pos = abs(2.0*(pos - 0.5));
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vec2 res = mix(0.0.xx, 1.0.xx, smoothstep(1.0.xx, 1.0.xx-b, sqrt(pos)));
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res = pow(res, 0.70.xx);
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return max(mix(1.0, sqrt(res.x*res.y), params.vigstr), 0.0);
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}
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vec3 plant (vec3 tar, float r)
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{
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float t = max(max(tar.r,tar.g),tar.b) + 0.00001;
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return tar * r / t;
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}
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float contrast(float x)
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{
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return max(mix(x, smoothstep(0.0, 1.0, x), params.contr),0.0);
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}
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void main()
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{
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vec4 imgColor = COMPAT_TEXTURE(Source, vTexCoord.xy);
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float w = float ((imgColor.r + imgColor.g + imgColor.b) < 1.5/255.0);
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float bp = w * BP/255.0;
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if (params.sega_fix > 0.5) imgColor.rgb = imgColor.rgb * (255.0 / 239.0);
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imgColor.rgb = min(imgColor.rgb, 1.0);
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vec3 color = imgColor.rgb;
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if (int(TNTC) == 0)
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{
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color.rgb = imgColor.rgb;
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}
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else
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{
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float lutlow = LUTLOW/255.0; float invLS = 1.0/LS;
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vec3 lut_ref = imgColor.rgb + lutlow*(1.0 - pow(imgColor.rgb, 0.333.xxx));
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float lutb = lut_ref.b * (1.0-0.5*invLS);
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lut_ref.rg = lut_ref.rg * (1.0-invLS) + 0.5*invLS;
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float tile1 = ceil (lutb * (LS-1.0));
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float tile0 = max(tile1 - 1.0, 0.0);
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float f = fract(lutb * (LS-1.0)); if (f == 0.0) f = 1.0;
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vec2 coord0 = vec2(tile0 + lut_ref.r, lut_ref.g)*vec2(invLS, 1.0);
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vec2 coord1 = vec2(tile1 + lut_ref.r, lut_ref.g)*vec2(invLS, 1.0);
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vec4 color1, color2, res;
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if (int(TNTC) == 1)
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{
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color1 = COMPAT_TEXTURE(SamplerLUT1, coord0);
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color2 = COMPAT_TEXTURE(SamplerLUT1, coord1);
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res = mix(color1, color2, f);
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}
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else if (int(TNTC) == 2)
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{
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color1 = COMPAT_TEXTURE(SamplerLUT2, coord0);
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color2 = COMPAT_TEXTURE(SamplerLUT2, coord1);
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res = mix(color1, color2, f);
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}
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else if (int(TNTC) == 3)
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{
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color1 = COMPAT_TEXTURE(SamplerLUT3, coord0);
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color2 = COMPAT_TEXTURE(SamplerLUT3, coord1);
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res = mix(color1, color2, f);
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}
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else if (int(TNTC) == 4)
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{
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color1 = COMPAT_TEXTURE(SamplerLUT4, coord0);
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color2 = COMPAT_TEXTURE(SamplerLUT4, coord1);
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res = mix(color1, color2, f);
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}
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res.rgb = fix_lut (res.rgb, imgColor.rgb);
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color = mix(imgColor.rgb, res.rgb, min(TNTC,1.0));
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}
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vec3 c = clamp(color, 0.0, 1.0);
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vec3 scolor1 = plant(pow(color, vec3(wp_saturation)), max(max(color.r,color.g),color.b));
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float luma = dot(color, vec3(0.299, 0.587, 0.114));
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vec3 scolor2 = mix(vec3(luma), color, wp_saturation);
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color = (wp_saturation > 1.0) ? scolor1 : scolor2;
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color = plant(color, contrast(max(max(color.r,color.g),color.b)));
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float p = 2.2;
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color = clamp(color, 0.0, 1.0);
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color = pow(color, vec3(p));
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vec3 warmer = D65_to_D55*color;
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warmer = ToSRGB*warmer;
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vec3 cooler = D65_to_D93*color;
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cooler = ToSRGB*cooler;
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float m = abs(WP)/100.0;
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vec3 comp = (WP < 0.0) ? cooler : warmer;
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color = mix(color, comp, m);
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color = pow(max(color, 0.0), vec3(1.0/p));
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if (BP > -0.5) color = color + bp; else
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{
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color = max(color + BP/255.0, 0.0) / (1.0 + BP/255.0*step(- BP/255.0, max(max(color.r,color.g),color.b)));
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}
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color = min(color * params.pre_bb, 1.0);
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vec2 dx = vec2(params.SourceSize.z, 0.0);
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vec2 xx = dx + dx;
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vec2 pC4 = vTexCoord;
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vec3 ol3 = COMPAT_TEXTURE(OriginalHistory1, pC4 -xx).rgb;
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vec3 ol2 = COMPAT_TEXTURE(OriginalHistory1, pC4 -dx).rgb;
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vec3 ol1 = COMPAT_TEXTURE(OriginalHistory1, pC4 ).rgb;
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vec3 or1 = COMPAT_TEXTURE(OriginalHistory1, pC4 +dx).rgb;
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vec3 or2 = COMPAT_TEXTURE(OriginalHistory1, pC4 +xx).rgb;
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vec3 cl3 = COMPAT_TEXTURE(OriginalHistory0, pC4 -xx).rgb;
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vec3 cl2 = COMPAT_TEXTURE(OriginalHistory0, pC4 -dx).rgb;
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vec3 cl1 = COMPAT_TEXTURE(OriginalHistory0, pC4 ).rgb;
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vec3 cr1 = COMPAT_TEXTURE(OriginalHistory0, pC4 +dx).rgb;
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vec3 cr2 = COMPAT_TEXTURE(OriginalHistory0, pC4 +xx).rgb;
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vec3 res = abs(ol3-cl3) + abs(ol2-cl2) + abs(ol1-cl1) + abs(or1-cr1) + abs(or2-cr2);
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float res1 = 1.0;
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if ((res.r+res.g+res.b) == 0.0) res1 = 0.0;
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FragColor = vec4(color * vignette(vTexCoord.xy), res1);
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} |