video_core: Integrate SMAA

Co-authored-by: goldenx86 <goldenx86@users.noreply.github.com>
Co-authored-by: BreadFish64 <breadfish64@users.noreply.github.com>

src/video_core/host_shaders/CMakeLists.txt

@@ -26,9 +26,16 @@ set(SHADER_FILES
     opengl_present.frag
     opengl_present.vert
     opengl_present_scaleforce.frag
+    opengl_smaa.glsl
     pitch_unswizzle.comp
     present_bicubic.frag
     present_gaussian.frag
+    smaa_edge_detection.vert
+    smaa_edge_detection.frag
+    smaa_blending_weight_calculation.vert
+    smaa_blending_weight_calculation.frag
+    smaa_neighborhood_blending.vert
+    smaa_neighborhood_blending.frag
     vulkan_blit_color_float.frag
     vulkan_blit_depth_stencil.frag
     vulkan_fidelityfx_fsr_easu_fp16.comp

src/video_core/host_shaders/StringShaderHeader.cmake

@@ -11,10 +11,6 @@ string(TOUPPER ${CONTENTS_NAME} CONTENTS_NAME)
 
 FILE(READ ${SOURCE_FILE} line_contents)
 
-# Replace double quotes with single quotes,
-# as double quotes will be used to wrap the lines
-STRING(REGEX REPLACE "\"" "'" line_contents "${line_contents}")
-
 # CMake separates list elements with semicolons, but semicolons
 # are used extensively in the shader code.
 # Replace with a temporary marker, to be reverted later.
@@ -25,7 +21,7 @@ STRING(REGEX REPLACE "\n" ";" line_contents "${line_contents}")
 
 # Build the shader string, wrapping each line in double quotes.
 foreach(line IN LISTS line_contents)
-    string(CONCAT CONTENTS "${CONTENTS}" \"${line}\\n\"\n)
+    string(CONCAT CONTENTS "${CONTENTS}" "R\"(${line}\n)\" ")
 endforeach()
 
 # Revert the original semicolons in the source.

src/video_core/host_shaders/smaa_blending_weight_calculation.frag

@@ -0,0 +1,36 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+layout (binding = 0) uniform sampler2D edges_tex;
+layout (binding = 1) uniform sampler2D area_tex;
+layout (binding = 2) uniform sampler2D search_tex;
+
+layout (location = 0) in vec2 tex_coord;
+layout (location = 1) in vec2 pix_coord;
+layout (location = 2) in vec4 offset[3];
+
+layout (location = 0) out vec4 frag_color;
+
+vec4 metrics = vec4(1.0 / textureSize(edges_tex, 0), textureSize(edges_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 0
+#define SMAA_INCLUDE_PS 1
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    frag_color = SMAABlendingWeightCalculationPS(tex_coord,
+                                       pix_coord,
+                                       offset,
+                                       edges_tex,
+                                       area_tex,
+                                       search_tex,
+                                       vec4(0)
+                                       );
+}

src/video_core/host_shaders/smaa_blending_weight_calculation.vert

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+#ifdef VULKAN
+#define VERTEX_ID gl_VertexIndex
+#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
+#define VERTEX_ID gl_VertexID
+#endif
+
+out gl_PerVertex {
+    vec4 gl_Position;
+};
+
+const vec2 vertices[3] =
+    vec2[3](vec2(-1,-1), vec2(3,-1), vec2(-1, 3));
+
+layout (binding = 0) uniform sampler2D edges_tex;
+layout (binding = 1) uniform sampler2D area_tex;
+layout (binding = 2) uniform sampler2D search_tex;
+
+layout (location = 0) out vec2 tex_coord;
+layout (location = 1) out vec2 pix_coord;
+layout (location = 2) out vec4 offset[3];
+
+vec4 metrics = vec4(1.0 / textureSize(edges_tex, 0), textureSize(edges_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 1
+#define SMAA_INCLUDE_PS 0
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    vec2 vertex = vertices[VERTEX_ID];
+    gl_Position = vec4(vertex, 0.0, 1.0);
+    tex_coord = (vertex + 1.0) / 2.0;
+    SMAABlendingWeightCalculationVS(tex_coord, pix_coord, offset);
+}

src/video_core/host_shaders/smaa_edge_detection.frag

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+layout (binding = 0) uniform sampler2D input_tex;
+
+layout (location = 0) in vec2 tex_coord;
+layout (location = 1) in vec4 offset[3];
+
+layout (location = 0) out vec2 frag_color;
+
+vec4 metrics = vec4(1.0 / textureSize(input_tex, 0), textureSize(input_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 0
+#define SMAA_INCLUDE_PS 1
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    frag_color = SMAAColorEdgeDetectionPS(tex_coord, offset, input_tex);
+}

src/video_core/host_shaders/smaa_edge_detection.vert

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+#ifdef VULKAN
+#define VERTEX_ID gl_VertexIndex
+#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
+#define VERTEX_ID gl_VertexID
+#endif
+
+out gl_PerVertex {
+    vec4 gl_Position;
+};
+
+const vec2 vertices[3] =
+    vec2[3](vec2(-1,-1), vec2(3,-1), vec2(-1, 3));
+
+layout (binding = 0) uniform sampler2D input_tex;
+
+layout (location = 0) out vec2 tex_coord;
+layout (location = 1) out vec4 offset[3];
+
+vec4 metrics = vec4(1.0 / textureSize(input_tex, 0), textureSize(input_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 1
+#define SMAA_INCLUDE_PS 0
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    vec2 vertex = vertices[VERTEX_ID];
+    gl_Position = vec4(vertex, 0.0, 1.0);
+    tex_coord = (vertex + 1.0) / 2.0;
+    SMAAEdgeDetectionVS(tex_coord, offset);
+}

src/video_core/host_shaders/smaa_neighborhood_blending.frag

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+layout (binding = 0) uniform sampler2D input_tex;
+layout (binding = 1) uniform sampler2D blend_tex;
+
+layout (location = 0) in vec2 tex_coord;
+layout (location = 1) in vec4 offset;
+
+layout (location = 0) out vec4 frag_color;
+
+vec4 metrics = vec4(1.0 / textureSize(input_tex, 0), textureSize(input_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 0
+#define SMAA_INCLUDE_PS 1
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    frag_color = SMAANeighborhoodBlendingPS(tex_coord,
+                                  offset,
+                                  input_tex,
+                                  blend_tex
+                                  );
+}

src/video_core/host_shaders/smaa_neighborhood_blending.vert

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#version 460
+
+#extension GL_GOOGLE_include_directive : enable
+
+#ifdef VULKAN
+#define VERTEX_ID gl_VertexIndex
+#else // ^^^ Vulkan ^^^ // vvv OpenGL vvv
+#define VERTEX_ID gl_VertexID
+#endif
+
+out gl_PerVertex {
+    vec4 gl_Position;
+};
+
+const vec2 vertices[3] =
+    vec2[3](vec2(-1,-1), vec2(3,-1), vec2(-1, 3));
+
+layout (binding = 0) uniform sampler2D input_tex;
+layout (binding = 1) uniform sampler2D blend_tex;
+
+layout (location = 0) out vec2 tex_coord;
+layout (location = 1) out vec4 offset;
+
+vec4 metrics = vec4(1.0 / textureSize(input_tex, 0), textureSize(input_tex, 0));
+#define SMAA_RT_METRICS metrics
+#define SMAA_GLSL_4
+#define SMAA_PRESET_ULTRA
+#define SMAA_INCLUDE_VS 1
+#define SMAA_INCLUDE_PS 0
+
+#include "opengl_smaa.glsl"
+
+void main() {
+    vec2 vertex = vertices[VERTEX_ID];
+    gl_Position = vec4(vertex, 0.0, 1.0);
+    tex_coord = (vertex + 1.0) / 2.0;
+    SMAANeighborhoodBlendingVS(tex_coord, offset);
+}