From 10cf0585180bcf2eab38ebf65dc593fecc4ddf92 Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Thu, 18 Jan 2024 20:47:50 -0500
Subject: renderer_opengl: implement layer stack composition

---
 src/video_core/renderer_opengl/present/layer.h | 80 ++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/video_core/renderer_opengl/present/layer.h

(limited to 'src/video_core/renderer_opengl/present/layer.h')

diff --git a/src/video_core/renderer_opengl/present/layer.h b/src/video_core/renderer_opengl/present/layer.h
new file mode 100644
index 000000000..ef1055abf
--- /dev/null
+++ b/src/video_core/renderer_opengl/present/layer.h
@@ -0,0 +1,80 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include "video_core/host1x/gpu_device_memory_manager.h"
+#include "video_core/renderer_opengl/gl_resource_manager.h"
+
+namespace Layout {
+struct FramebufferLayout;
+}
+
+namespace Service::android {
+enum class PixelFormat : u32;
+};
+
+namespace Tegra {
+struct FramebufferConfig;
+}
+
+namespace OpenGL {
+
+struct FramebufferTextureInfo;
+class FSR;
+class FXAA;
+class ProgramManager;
+class RasterizerOpenGL;
+class SMAA;
+
+/// Structure used for storing information about the textures for the Switch screen
+struct TextureInfo {
+    OGLTexture resource;
+    GLsizei width;
+    GLsizei height;
+    GLenum gl_format;
+    GLenum gl_type;
+    Service::android::PixelFormat pixel_format;
+};
+
+struct ScreenRectVertex;
+
+class Layer {
+public:
+    explicit Layer(RasterizerOpenGL& rasterizer, Tegra::MaxwellDeviceMemoryManager& device_memory);
+    ~Layer();
+
+    GLuint ConfigureDraw(std::array<GLfloat, 3 * 2>& out_matrix,
+                         std::array<ScreenRectVertex, 4>& out_vertices,
+                         ProgramManager& program_manager,
+                         const Tegra::FramebufferConfig& framebuffer,
+                         const Layout::FramebufferLayout& layout);
+
+private:
+    /// Loads framebuffer from emulated memory into the active OpenGL texture.
+    FramebufferTextureInfo LoadFBToScreenInfo(const Tegra::FramebufferConfig& framebuffer);
+    FramebufferTextureInfo PrepareRenderTarget(const Tegra::FramebufferConfig& framebuffer);
+    void ConfigureFramebufferTexture(const Tegra::FramebufferConfig& framebuffer);
+
+    void CreateFXAA();
+    void CreateSMAA();
+
+private:
+    RasterizerOpenGL& rasterizer;
+    Tegra::MaxwellDeviceMemoryManager& device_memory;
+
+    /// OpenGL framebuffer data
+    std::vector<u8> gl_framebuffer_data;
+
+    /// Display information for Switch screen
+    TextureInfo framebuffer_texture;
+
+    std::unique_ptr<FSR> fsr;
+    std::unique_ptr<FXAA> fxaa;
+    std::unique_ptr<SMAA> smaa;
+};
+
+} // namespace OpenGL
-- 
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