Add AMD FSR Super Resolution Upscaler

fsr/fsr.slangp

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+shaders = 2
+
+shader0 = shaders/fsr-pass0.slang
+filter_linear0 = true
+scale_type0 = viewport
+scale0 = 1.0
+
+shader1 = shaders/fsr-pass1.slang
+filter_linear1 = true
+scale_type1 = source
+scale1 = 1.0
+
+parameters = "FSR_SHARPENING;FSR_FILMGRAIN"
+FSR_SHARPENING = 0.3
+FSR_FILMGRAIN = 0.10

fsr/shaders/fsr-pass0.slang

@@ -0,0 +1,66 @@
+#version 450
+#pragma name FSR_EASU
+
+// FSR - [EASU] EDGE ADAPTIVE SPATIAL UPSAMPLING
+
+// filter_linear0 = true
+// scale_type0 = viewport
+// scale0 = 1.0
+
+layout(push_constant) uniform Push {
+    vec4 SourceSize;
+    vec4 OriginalSize;
+    vec4 OutputSize;
+    uint FrameCount;
+} params;
+
+layout(std140, set = 0, binding = 0) uniform UBO {
+    mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main() {
+    gl_Position = global.MVP * Position;
+    vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+#define A_GPU 1
+#define A_GLSL 1
+#include "ffx_a.h"
+
+#define FSR_EASU_F 1
+AU4 con0, con1, con2, con3;
+
+AF4 FsrEasuRF(AF2 p) {
+    return textureGather(Source, p, 0);
+}
+AF4 FsrEasuGF(AF2 p) {
+    return textureGather(Source, p, 1);
+}
+AF4 FsrEasuBF(AF2 p) {
+    return textureGather(Source, p, 2);
+}
+
+#include "ffx_fsr1.h"
+
+void main() {
+    FsrEasuCon(con0, con1, con2, con3,
+        params.SourceSize.x, params.SourceSize.y,  // Viewport size (top left aligned) in the input image which is to be scaled.
+        params.SourceSize.x, params.SourceSize.y,  // The size of the input image.
+        params.OutputSize.x, params.OutputSize.y); // The output resolution.
+
+    AU2 gxy = AU2(vTexCoord.xy * params.OutputSize.xy); // Integer pixel position in output.
+    AF3 Gamma2Color = AF3(0, 0, 0);
+    FsrEasuF(Gamma2Color, gxy, con0, con1, con2, con3);
+
+    FragColor = vec4(Gamma2Color, 1.0);
+}

fsr/shaders/fsr-pass1.slang

@@ -0,0 +1,70 @@
+#version 450
+#pragma name FSR_RCAS
+
+// FSR - [RCAS] ROBUST CONTRAST ADAPTIVE SHARPENING
+
+// filter_linear1 = true
+// scale_type1 = source
+// scale1 = 1.0
+
+#pragma parameter FSR_SHARPENING "FSR RCAS Sharpening Amount (Lower = Sharper)" 0.2 0.0 2.0 0.1
+#pragma parameter FSR_FILMGRAIN "FSR LFGA Film Grain Intensity" 0.10 0.0 1.0 0.02
+
+layout(push_constant) uniform Push {
+    vec4 SourceSize;
+    vec4 OriginalSize;
+    vec4 OutputSize;
+    uint FrameCount;
+    float FSR_SHARPENING;
+    float FSR_FILMGRAIN;
+} params;
+
+layout(std140, set = 0, binding = 0) uniform UBO {
+    mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main() {
+    gl_Position = global.MVP * Position;
+    vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+#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, ASU2(p), 0));
+}
+
+void FsrRcasInputF(inout AF1 r, inout AF1 g, inout AF1 b) {}
+
+#include "ffx_fsr1.h"
+
+void main() {
+    FsrRcasCon(con0, params.FSR_SHARPENING);
+
+    AU2 gxy = AU2(vTexCoord.xy * params.OutputSize.xy); // Integer pixel position in output.
+    AF3 Gamma2Color = AF3(0, 0, 0);
+    FsrRcasF(Gamma2Color.r, Gamma2Color.g, Gamma2Color.b, gxy, con0);
+
+    // FSR - [LFGA] LINEAR FILM GRAIN APPLICATOR
+    if (params.FSR_FILMGRAIN > 0.0) {
+        AF1 noise = fract(10000 * sin(((vTexCoord.x + vTexCoord.y * A_2PI) * params.FrameCount)));
+        FsrLfgaF(Gamma2Color, AF3_(noise - 0.5), params.FSR_FILMGRAIN);
+    }
+
+    FragColor = vec4(Gamma2Color, 1.0);
+}

fsr/smaa+fsr.slangp

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+shaders = 6
+
+shader0 = ../stock.slang
+filter_linear0 = false
+scale_type0 = source
+scale0 = 1.0
+alias0 = SMAA_Input
+
+shader1 = ../anti-aliasing/shaders/smaa/smaa-pass0.slang
+filter_linear1 = true
+scale_type1 = source
+scale1 = 1.0
+
+shader2 = ../anti-aliasing/shaders/smaa/smaa-pass1.slang
+filter_linear2 = true
+scale_type2 = source
+scale2 = 1.0
+
+shader3 = ../anti-aliasing/shaders/smaa/smaa-pass2.slang
+filter_linear3 = true
+scale_type3 = source
+scale3 = 1.0
+
+textures = "areaTex;searchTex"
+areaTex = ../anti-aliasing/shaders/smaa/AreaTex.png
+searchTex = ../anti-aliasing/shaders/smaa/SearchTex.png
+
+shader4 = shaders/fsr-pass0.slang
+filter_linear4 = true
+scale_type4 = viewport
+scale4 = 1.0
+
+shader5 = shaders/fsr-pass1.slang
+filter_linear5 = true
+scale_type5 = source
+scale5 = 1.0
+
+parameters = "SMAA_EDT;FSR_SHARPENING;FSR_FILMGRAIN"
+SMAA_EDT = 1.0
+FSR_SHARPENING = 0.1
+FSR_FILMGRAIN = 0.12