Add Support for Post Processing Effects (#3616)

* Add Post Processing Effects

* fix events and shader issues

* fix gtk upscale slider value

* fix bgra games

* don't swap swizzle if already swapped

* restore opengl texture state after effects run

* addressed review

* use single pipeline for smaa and fsr

* call finish on all pipelines

* addressed review

* attempt fix file case

* attempt fixing file case

* fix filter level tick frequency

* adjust filter slider margins

* replace fxaa shaders with original shader

* addressed review

Ryujinx.Graphics.OpenGL/Effects/Shaders/fsr_scaling.glsl

@@ -0,0 +1,88 @@
+#version 430 core
+precision mediump float;
+layout (local_size_x = 64) in;
+layout(rgba8, binding = 0, location=0) uniform image2D imgOutput;
+layout( location=1 ) uniform sampler2D Source;
+layout( location=2 ) uniform float srcX0;
+layout( location=3 ) uniform float srcX1;
+layout( location=4 ) uniform float srcY0;
+layout( location=5 ) uniform float srcY1;
+layout( location=6 ) uniform float dstX0;
+layout( location=7 ) uniform float dstX1;
+layout( location=8 ) uniform float dstY0;
+layout( location=9 ) uniform float dstY1;
+layout( location=10 ) uniform float scaleX;
+layout( location=11 ) uniform float scaleY;
+
+#define A_GPU 1
+#define A_GLSL 1
+#include "ffx_a.h"
+
+#define FSR_EASU_F 1
+AU4 con0, con1, con2, con3;
+float srcW, srcH, dstW, dstH;
+vec2 bLeft, tRight;
+
+AF2 translate(AF2 pos) {
+    return AF2(pos.x * scaleX, pos.y * scaleY);
+}
+
+void setBounds(vec2 bottomLeft, vec2 topRight) {
+    bLeft = bottomLeft;
+    tRight = topRight;
+}
+
+AF2 translateDest(AF2 pos) {
+    AF2 translatedPos = AF2(pos.x, pos.y);
+    translatedPos.x = dstX1 < dstX0 ? dstX1 - translatedPos.x : translatedPos.x;
+    translatedPos.y = dstY0 > dstY1 ? dstY0 + dstY1 - translatedPos.y - 1: translatedPos.y;
+    return translatedPos;
+}
+
+AF4 FsrEasuRF(AF2 p) { AF4 res = textureGather(Source, translate(p), 0); return res; }
+AF4 FsrEasuGF(AF2 p) { AF4 res = textureGather(Source, translate(p), 1); return res; }
+AF4 FsrEasuBF(AF2 p) { AF4 res = textureGather(Source, translate(p), 2); return res; }
+
+#include "ffx_fsr1.h"
+
+float insideBox(vec2 v) {
+    vec2 s = step(bLeft, v) - step(tRight, v);
+    return s.x * s.y;   
+}
+
+void CurrFilter(AU2 pos)
+{
+    if((insideBox(vec2(pos.x, pos.y))) == 0) {
+        imageStore(imgOutput, ASU2(pos.x, pos.y), AF4(0,0,0,1));
+       return;
+    }
+    AF3 c;
+    FsrEasuF(c, AU2(pos.x - bLeft.x, pos.y - bLeft.y), con0, con1, con2, con3);
+    imageStore(imgOutput, ASU2(translateDest(pos)), AF4(c, 1));
+}
+
+void main() {
+    srcW = abs(srcX1 - srcX0);
+    srcH = abs(srcY1 - srcY0);
+    dstW = abs(dstX1 - dstX0);
+    dstH = abs(dstY1 - dstY0);
+
+    AU2 gxy = ARmp8x8(gl_LocalInvocationID.x) + AU2(gl_WorkGroupID.x << 4u, gl_WorkGroupID.y << 4u);
+
+    setBounds(vec2(dstX0 < dstX1 ? dstX0 : dstX1, dstY0 < dstY1 ? dstY0 : dstY1),
+        vec2(dstX1 > dstX0 ? dstX1 : dstX0, dstY1 > dstY0 ? dstY1 : dstY0));
+
+    // Upscaling
+    FsrEasuCon(con0, con1, con2, con3,
+        srcW, srcH,  // Viewport size (top left aligned) in the input image which is to be scaled.
+        srcW, srcH,  // The size of the input image.
+        dstW, dstH); // The output resolution.
+
+    CurrFilter(gxy);
+    gxy.x += 8u;
+    CurrFilter(gxy);
+    gxy.y += 8u;
+    CurrFilter(gxy);
+    gxy.x -= 8u;
+    CurrFilter(gxy);
+}

Ryujinx.Graphics.OpenGL/Effects/Shaders/fsr_sharpening.glsl

@@ -0,0 +1,37 @@
+#version 430 core
+precision mediump float;
+layout (local_size_x = 64) in;
+layout(rgba8, binding = 0, location=0) uniform image2D imgOutput;
+layout( location=1 ) uniform sampler2D source;
+layout( location=2 ) uniform float sharpening;
+
+#define A_GPU 1
+#define A_GLSL 1
+#include "ffx_a.h"
+
+#define FSR_RCAS_F 1
+AU4 con0;
+
+AF4 FsrRcasLoadF(ASU2 p) { return AF4(texelFetch(source, p, 0)); }
+void FsrRcasInputF(inout AF1 r, inout AF1 g, inout AF1 b) {}
+
+#include "ffx_fsr1.h"
+
+void CurrFilter(AU2 pos)
+{
+    AF3 c;
+    FsrRcasF(c.r, c.g, c.b, pos, con0);
+    imageStore(imgOutput, ASU2(pos), AF4(c, 1));
+}
+
+void main() {
+    FsrRcasCon(con0, sharpening);
+    AU2 gxy = ARmp8x8(gl_LocalInvocationID.x) + AU2(gl_WorkGroupID.x << 4u, gl_WorkGroupID.y << 4u);
+    CurrFilter(gxy);
+    gxy.x += 8u;
+    CurrFilter(gxy);
+    gxy.y += 8u;
+    CurrFilter(gxy);
+    gxy.x -= 8u;
+    CurrFilter(gxy);
+}

Ryujinx.Graphics.OpenGL/Effects/Shaders/smaa_blend.glsl

@@ -0,0 +1,26 @@
+layout(rgba8, binding = 0) uniform image2D imgOutput;
+
+uniform sampler2D inputTexture;
+layout( location=0 ) uniform vec2 invResolution;
+uniform sampler2D samplerArea;
+uniform sampler2D samplerSearch;
+
+void main() {
+    ivec2 loc = ivec2(gl_GlobalInvocationID.x * 4, gl_GlobalInvocationID.y * 4);
+    for(int i = 0; i < 4; i++)
+    {
+        for(int j = 0; j < 4; j++)
+        {
+            ivec2 texelCoord = ivec2(loc.x + i, loc.y + j);
+            vec2 coord = (texelCoord + vec2(0.5)) / invResolution;
+            vec2 pixCoord;
+            vec4 offset[3];
+
+            SMAABlendingWeightCalculationVS(coord, pixCoord, offset);
+
+            vec4 oColor = SMAABlendingWeightCalculationPS(coord, pixCoord, offset, inputTexture, samplerArea, samplerSearch, ivec4(0));    
+
+            imageStore(imgOutput, texelCoord, oColor);
+        }
+    }
+}

Ryujinx.Graphics.OpenGL/Effects/Shaders/smaa_edge.glsl

@@ -0,0 +1,24 @@
+layout(rgba8, binding = 0) uniform image2D imgOutput;
+
+uniform sampler2D inputTexture;
+layout( location=0 ) uniform vec2 invResolution;
+
+void main() 
+{
+    vec2 loc = ivec2(gl_GlobalInvocationID.x * 4, gl_GlobalInvocationID.y * 4);
+    for(int i = 0; i < 4; i++)
+    {
+        for(int j = 0; j < 4; j++)
+        {
+            ivec2 texelCoord = ivec2(loc.x + i, loc.y + j);
+            vec2 coord = (texelCoord + vec2(0.5)) / invResolution;
+            vec4 offset[3];
+            SMAAEdgeDetectionVS(coord, offset);
+            vec2 oColor = SMAAColorEdgeDetectionPS(coord, offset, inputTexture);
+            if (oColor != float2(-2.0, -2.0))
+            {
+                imageStore(imgOutput, texelCoord, vec4(oColor, 0.0, 1.0));
+            }
+        }
+    }
+}

Ryujinx.Graphics.OpenGL/Effects/Shaders/smaa_neighbour.glsl

@@ -0,0 +1,26 @@
+layout(rgba8, binding = 0) uniform image2D imgOutput;
+
+uniform sampler2D inputTexture;
+layout( location=0 ) uniform vec2 invResolution;
+uniform sampler2D samplerBlend;
+
+void main() {
+    vec2 loc = ivec2(gl_GlobalInvocationID.x * 4, gl_GlobalInvocationID.y * 4);
+    for(int i = 0; i < 4; i++)
+    {
+        for(int j = 0; j < 4; j++)
+        {
+            ivec2 texelCoord = ivec2(loc.x + i, loc.y + j);
+            vec2 coord = (texelCoord + vec2(0.5)) / invResolution;
+            vec2 pixCoord;
+            vec4 offset;
+            
+            SMAANeighborhoodBlendingVS(coord, offset);
+
+            vec4 oColor = SMAANeighborhoodBlendingPS(coord, offset, inputTexture, samplerBlend);
+
+            imageStore(imgOutput,  texelCoord, oColor);
+        }
+    }
+
+}