#include "ReShade.fxh" /* Geom Shader - a modified CRT-Geom without CRT features made to be appended/integrated into any other shaders and provide curvature/warping/oversampling features. Adapted by Hyllian (2024). */ /* CRT-interlaced Copyright (C) 2010-2012 cgwg, Themaister and DOLLS This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. (cgwg gave their consent to have the original version of this shader distributed under the GPL in this message: http://board.byuu.org/viewtopic.php?p=26075#p26075 "Feel free to distribute my shaders under the GPL. After all, the barrel distortion code was taken from the Curvature shader, which is under the GPL." ) This shader variant is pre-configured with screen curvature */ uniform bool geom_curvature < ui_type = "radio"; ui_label = "Geom Curvature Toggle"; > = 1.0; uniform float geom_R < ui_type = "drag"; ui_min = 0.1; ui_max = 10.0; ui_step = 0.1; ui_label = "Geom Curvature Radius"; > = 2.0; uniform float geom_d < ui_type = "drag"; ui_min = 0.1; ui_max = 3.0; ui_step = 0.1; ui_label = "Geom Distance"; > = 1.5; uniform bool geom_invert_aspect < ui_type = "radio"; ui_label = "Geom Curvature Aspect Inversion"; > = 0.0; uniform float geom_cornersize < ui_type = "drag"; ui_min = 0.001; ui_max = 1.0; ui_step = 0.005; ui_label = "Geom Corner Size"; > = 0.03; uniform float geom_cornersmooth < ui_type = "drag"; ui_min = 80.0; ui_max = 2000.0; ui_step = 100.0; ui_label = "Geom Corner Smoothness"; > = 1000.0; uniform float geom_x_tilt < ui_type = "drag"; ui_min = -1.0; ui_max = 1.0; ui_step = 0.05; ui_label = "Geom Horizontal Tilt"; > = 0.0; uniform float geom_y_tilt < ui_type = "drag"; ui_min = -1.0; ui_max = 1.0; ui_step = 0.05; ui_label = "Geom Vertical Tilt"; > = 0.0; uniform float geom_overscan_x < ui_type = "drag"; ui_min = -125.0; ui_max = 125.0; ui_step = 0.5; ui_label = "Geom Horiz. Overscan %"; > = 100.0; uniform float geom_overscan_y < ui_type = "drag"; ui_min = -125.0; ui_max = 125.0; ui_step = 0.5; ui_label = "Geom Vert. Overscan %"; > = 100.0; uniform float centerx < ui_type = "drag"; ui_min = -100.0; ui_max = 100.0; ui_step = 0.1; ui_label = "Image Center X"; > = 0.00; uniform float centery < ui_type = "drag"; ui_min = -100.0; ui_max = 100.0; ui_step = 0.1; ui_label = "Image Center Y"; > = 0.00; uniform float geom_lum < ui_type = "drag"; ui_min = 0.5; ui_max = 2.0; ui_step = 0.01; ui_label = "Geom Luminance"; > = 1.0; uniform float geom_target_gamma < ui_type = "drag"; ui_min = 0.1; ui_max = 5.0; ui_step = 0.1; ui_label = "Geom Target Gamma"; > = 2.4; uniform float geom_monitor_gamma < ui_type = "drag"; ui_min = 0.1; ui_max = 5.0; ui_step = 0.1; ui_label = "Geom Monitor Gamma"; > = 2.2; uniform float2 BufferToViewportRatio < source = "buffer_to_viewport_ratio"; >; uniform float2 NormalizedNativePixelSize < source = "normalized_native_pixel_size"; >; uniform float2 ViewportSize < source = "viewportsize"; >; uniform float ViewportWidth < source = "viewportwidth"; >; uniform float ViewportHeight < source = "viewportheight"; >; sampler2D sBackBuffer{Texture=ReShade::BackBufferTex;AddressU=BORDER;AddressV=BORDER;AddressW=BORDER;MagFilter=LINEAR;MinFilter=LINEAR;}; // Comment the next line to disable interpolation in linear gamma (and // gain speed). #define LINEAR_PROCESSING // Enable 3x oversampling of the beam profile; improves moire effect caused by scanlines+curvature #define OVERSAMPLE // Use the older, purely gaussian beam profile; uncomment for speed //#define USEGAUSSIAN // Macros. #define FIX(c) max(abs(c), 1e-5); #define PI 3.141592653589 #ifdef LINEAR_PROCESSING # define TEX2D(c) pow(tex2D(sBackBuffer, (c)), geom_target_gamma.xxxx) #else # define TEX2D(c) tex2D(sBackBuffer, (c)) #endif // aspect ratio #define aspect (geom_invert_aspect==true?float2(ViewportHeight/ViewportWidth,1.0):float2(1.0,ViewportHeight/ViewportWidth)) #define overscan (1.01.xx); struct ST_VertexOut { float2 sinangle : TEXCOORD1; float2 cosangle : TEXCOORD2; float3 stretch : TEXCOORD3; float2 TextureSize : TEXCOORD4; }; float intersect(float2 xy, float2 sinangle, float2 cosangle) { float A = dot(xy,xy) + geom_d*geom_d; float B, C; B = 2.0*(geom_R*(dot(xy,sinangle) - geom_d*cosangle.x*cosangle.y) - geom_d*geom_d); C = geom_d*geom_d + 2.0*geom_R*geom_d*cosangle.x*cosangle.y; return (-B-sqrt(B*B - 4.0*A*C))/(2.0*A); } float2 bkwtrans(float2 xy, float2 sinangle, float2 cosangle) { float c = intersect(xy, sinangle, cosangle); float2 point = (c.xx*xy + geom_R.xx*sinangle) / geom_R.xx; float2 poc = point/cosangle; float2 tang = sinangle/cosangle; float A = dot(tang, tang) + 1.0; float B = -2.0*dot(poc, tang); float C = dot(poc, poc) - 1.0; float a = (-B + sqrt(B*B - 4.0*A*C)) / (2.0*A); float2 uv = (point - a*sinangle) / cosangle; float r = FIX(geom_R*acos(a)); return uv*r/sin(r/geom_R); } float2 fwtrans(float2 uv, float2 sinangle, float2 cosangle) { float r = FIX(sqrt(dot(uv, uv))); uv *= sin(r/geom_R)/r; float x = 1.0 - cos(r/geom_R); float D; D = geom_d/geom_R + x*cosangle.x*cosangle.y + dot(uv,sinangle); return geom_d*(uv*cosangle - x*sinangle)/D; } float3 maxscale(float2 sinangle, float2 cosangle) { float2 c = bkwtrans(-geom_R * sinangle / (1.0 + geom_R/geom_d*cosangle.x*cosangle.y), sinangle, cosangle); float2 a = 0.5.xx*aspect; float2 lo = float2(fwtrans(float2(-a.x, c.y), sinangle, cosangle).x, fwtrans(float2( c.x, -a.y), sinangle, cosangle).y)/aspect; float2 hi = float2(fwtrans(float2(+a.x, c.y), sinangle, cosangle).x, fwtrans(float2( c.x, +a.y), sinangle, cosangle).y)/aspect; return float3((hi+lo)*aspect*0.5,max(hi.x-lo.x, hi.y-lo.y)); } float2 transform(float2 coord, float2 sinangle, float2 cosangle, float3 stretch) { coord = (coord - 0.5.xx)*aspect*stretch.z + stretch.xy; return (bkwtrans(coord, sinangle, cosangle) / float2(geom_overscan_x / 100.0, geom_overscan_y / 100.0)/aspect + 0.5.xx); } // Vertex shader generating a triangle covering the entire screen void VS_CRT_Geom(in uint id : SV_VertexID, out float4 position : SV_Position, out float2 texcoord : TEXCOORD, out ST_VertexOut vVARS) { texcoord.x = (id == 2) ? 2.0 : 0.0; texcoord.y = (id == 1) ? 2.0 : 0.0; position = float4(texcoord * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1.0); // Screen centering texcoord = texcoord - float2(centerx,centery)/100.0; float2 SourceSize = 1.0/NormalizedNativePixelSize; // Precalculate a bunch of useful values we'll need in the fragment // shader. vVARS.sinangle = sin(float2(geom_x_tilt, geom_y_tilt)); vVARS.cosangle = cos(float2(geom_x_tilt, geom_y_tilt)); vVARS.stretch = maxscale(vVARS.sinangle, vVARS.cosangle); vVARS.TextureSize = float2(SourceSize.x, SourceSize.y); } float corner(float2 coord) { coord = min(coord, 1.0.xx - coord) * aspect; float2 cdist = geom_cornersize.xx; coord = (cdist - min(coord, cdist)); float dist = sqrt(dot(coord, coord)); return clamp((cdist.x - dist)*geom_cornersmooth, 0.0, 1.0); } float fwidth(float value) { return abs(ddx(value)) + abs(ddy(value)); } float4 PS_CRT_Geom(float4 vpos: SV_Position, float2 vTexCoord : TEXCOORD, in ST_VertexOut vVARS) : SV_Target { // Texture coordinates of the texel containing the active pixel. float2 xy = (geom_curvature == true) ? transform(vTexCoord, vVARS.sinangle, vVARS.cosangle, vVARS.stretch) : vTexCoord; float cval = corner((xy-0.5.xx) * BufferToViewportRatio + 0.5.xx); float2 uv_ratio = frac((xy * vVARS.TextureSize - 0.5.xx) / vVARS.TextureSize); float4 col = TEX2D(xy); #ifndef LINEAR_PROCESSING col = pow(col, geom_target_gamma.xxxx); #endif col.rgb *= (geom_lum * step(0.0, uv_ratio.y)); float3 mul_res = col.rgb * cval.xxx; // Convert the image gamma for display on our output device. mul_res = pow(mul_res, 1.0 / geom_monitor_gamma.xxx); return float4(mul_res, 1.0); } technique CRT_Geom { pass { VertexShader = VS_CRT_Geom; PixelShader = PS_CRT_Geom; } }