1 files changed, 108 insertions, 0 deletions
diff --git a/src/video_core/renderer_opengl/present/smaa.cpp b/src/video_core/renderer_opengl/present/smaa.cpp
new file mode 100644
index 000000000..a9a0eb6c6
--- /dev/null
+++ b/src/video_core/renderer_opengl/present/smaa.cpp
@@ -0,0 +1,108 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "video_core/host_shaders/opengl_smaa_glsl.h"
+#include "video_core/host_shaders/smaa_blending_weight_calculation_frag.h"
+#include "video_core/host_shaders/smaa_blending_weight_calculation_vert.h"
+#include "video_core/host_shaders/smaa_edge_detection_frag.h"
+#include "video_core/host_shaders/smaa_edge_detection_vert.h"
+#include "video_core/host_shaders/smaa_neighborhood_blending_frag.h"
+#include "video_core/host_shaders/smaa_neighborhood_blending_vert.h"
+#include "video_core/renderer_opengl/gl_shader_manager.h"
+#include "video_core/renderer_opengl/gl_shader_util.h"
+#include "video_core/renderer_opengl/present/smaa.h"
+#include "video_core/renderer_opengl/present/util.h"
+#include "video_core/smaa_area_tex.h"
+#include "video_core/smaa_search_tex.h"
+
+namespace OpenGL {
+
+SMAA::SMAA(u32 width, u32 height) {
+    const auto SmaaShader = [&](std::string_view specialized_source, GLenum stage) {
+        std::string shader_source{specialized_source};
+        ReplaceInclude(shader_source, "opengl_smaa.glsl", HostShaders::OPENGL_SMAA_GLSL);
+        return CreateProgram(shader_source, stage);
+    };
+
+    edge_detection_vert = SmaaShader(HostShaders::SMAA_EDGE_DETECTION_VERT, GL_VERTEX_SHADER);
+    edge_detection_frag = SmaaShader(HostShaders::SMAA_EDGE_DETECTION_FRAG, GL_FRAGMENT_SHADER);
+    blending_weight_calculation_vert =
+        SmaaShader(HostShaders::SMAA_BLENDING_WEIGHT_CALCULATION_VERT, GL_VERTEX_SHADER);
+    blending_weight_calculation_frag =
+        SmaaShader(HostShaders::SMAA_BLENDING_WEIGHT_CALCULATION_FRAG, GL_FRAGMENT_SHADER);
+    neighborhood_blending_vert =
+        SmaaShader(HostShaders::SMAA_NEIGHBORHOOD_BLENDING_VERT, GL_VERTEX_SHADER);
+    neighborhood_blending_frag =
+        SmaaShader(HostShaders::SMAA_NEIGHBORHOOD_BLENDING_FRAG, GL_FRAGMENT_SHADER);
+
+    glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+    glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+
+    area_tex.Create(GL_TEXTURE_2D);
+    glTextureStorage2D(area_tex.handle, 1, GL_RG8, AREATEX_WIDTH, AREATEX_HEIGHT);
+    glTextureSubImage2D(area_tex.handle, 0, 0, 0, AREATEX_WIDTH, AREATEX_HEIGHT, GL_RG,
+                        GL_UNSIGNED_BYTE, areaTexBytes);
+    search_tex.Create(GL_TEXTURE_2D);
+    glTextureStorage2D(search_tex.handle, 1, GL_R8, SEARCHTEX_WIDTH, SEARCHTEX_HEIGHT);
+    glTextureSubImage2D(search_tex.handle, 0, 0, 0, SEARCHTEX_WIDTH, SEARCHTEX_HEIGHT, GL_RED,
+                        GL_UNSIGNED_BYTE, searchTexBytes);
+
+    edges_tex.Create(GL_TEXTURE_2D);
+    glTextureStorage2D(edges_tex.handle, 1, GL_RG16F, width, height);
+
+    blend_tex.Create(GL_TEXTURE_2D);
+    glTextureStorage2D(blend_tex.handle, 1, GL_RGBA16F, width, height);
+
+    sampler = CreateBilinearSampler();
+
+    framebuffer.Create();
+
+    texture.Create(GL_TEXTURE_2D);
+    glTextureStorage2D(texture.handle, 1, GL_RGBA16F, width, height);
+    glNamedFramebufferTexture(framebuffer.handle, GL_COLOR_ATTACHMENT0, texture.handle, 0);
+}
+
+SMAA::~SMAA() = default;
+
+GLuint SMAA::Draw(ProgramManager& program_manager, GLuint input_texture) {
+    glClearColor(0, 0, 0, 0);
+    glFrontFace(GL_CCW);
+    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer.handle);
+    glBindSampler(0, sampler.handle);
+    glBindSampler(1, sampler.handle);
+    glBindSampler(2, sampler.handle);
+
+    glBindTextureUnit(0, input_texture);
+    glNamedFramebufferTexture(framebuffer.handle, GL_COLOR_ATTACHMENT0, edges_tex.handle, 0);
+    glClear(GL_COLOR_BUFFER_BIT);
+    program_manager.BindPresentPrograms(edge_detection_vert.handle, edge_detection_frag.handle);
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+
+    glBindTextureUnit(0, edges_tex.handle);
+    glBindTextureUnit(1, area_tex.handle);
+    glBindTextureUnit(2, search_tex.handle);
+    glNamedFramebufferTexture(framebuffer.handle, GL_COLOR_ATTACHMENT0, blend_tex.handle, 0);
+    glClear(GL_COLOR_BUFFER_BIT);
+    program_manager.BindPresentPrograms(blending_weight_calculation_vert.handle,
+                                        blending_weight_calculation_frag.handle);
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+
+    glBindTextureUnit(0, input_texture);
+    glBindTextureUnit(1, blend_tex.handle);
+    glNamedFramebufferTexture(framebuffer.handle, GL_COLOR_ATTACHMENT0, texture.handle, 0);
+    program_manager.BindPresentPrograms(neighborhood_blending_vert.handle,
+                                        neighborhood_blending_frag.handle);
+    glClear(GL_COLOR_BUFFER_BIT);
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+    glFrontFace(GL_CW);
+
+    return texture.handle;
+}
+
+} // namespace OpenGL