From bab21e8cb3df9c06e3c0a37a8fc68fed676f5d6e Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 11 Apr 2019 17:14:55 -0300
Subject: gl_texture_cache: Initial implementation

---
 src/video_core/renderer_opengl/gl_texture_cache.h | 131 ++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 src/video_core/renderer_opengl/gl_texture_cache.h

(limited to 'src/video_core/renderer_opengl/gl_texture_cache.h')

diff --git a/src/video_core/renderer_opengl/gl_texture_cache.h b/src/video_core/renderer_opengl/gl_texture_cache.h
new file mode 100644
index 000000000..f0a524882
--- /dev/null
+++ b/src/video_core/renderer_opengl/gl_texture_cache.h
@@ -0,0 +1,131 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <functional>
+#include <utility>
+#include <vector>
+
+#include <glad/glad.h>
+
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/texture_cache.h"
+
+namespace OpenGL {
+
+using VideoCommon::SurfaceParams;
+using VideoCommon::ViewKey;
+using VideoCore::Surface::ComponentType;
+using VideoCore::Surface::PixelFormat;
+using VideoCore::Surface::SurfaceTarget;
+using VideoCore::Surface::SurfaceType;
+
+class CachedSurfaceView;
+class CachedSurface;
+
+using TextureCacheBase = VideoCommon::TextureCacheContextless<CachedSurface, CachedSurfaceView>;
+
+class CachedSurface final : public VideoCommon::SurfaceBaseContextless<CachedSurfaceView> {
+    friend CachedSurfaceView;
+
+public:
+    explicit CachedSurface(const SurfaceParams& params);
+    ~CachedSurface();
+
+    void LoadBuffer();
+
+    GLuint GetTexture() const {
+        return texture.handle;
+    }
+
+protected:
+    std::unique_ptr<CachedSurfaceView> CreateView(const ViewKey& view_key);
+
+    void FlushBufferImpl();
+
+    void UploadTextureImpl();
+
+private:
+    void UploadTextureMipmap(u32 level);
+
+    GLenum internal_format{};
+    GLenum format{};
+    GLenum type{};
+    bool is_compressed{};
+
+    OGLTexture texture;
+
+    std::vector<u8> staging_buffer;
+    u8* host_ptr{};
+};
+
+class CachedSurfaceView final {
+public:
+    explicit CachedSurfaceView(CachedSurface& surface, ViewKey key);
+    ~CachedSurfaceView();
+
+    GLuint GetTexture();
+
+    GLuint GetTexture(Tegra::Shader::TextureType texture_type, bool is_array,
+                      Tegra::Texture::SwizzleSource x_source,
+                      Tegra::Texture::SwizzleSource y_source,
+                      Tegra::Texture::SwizzleSource z_source,
+                      Tegra::Texture::SwizzleSource w_source);
+
+    void MarkAsModified(bool is_modified) {
+        surface.MarkAsModified(is_modified);
+    }
+
+    const SurfaceParams& GetSurfaceParams() const {
+        return params;
+    }
+
+private:
+    struct TextureView {
+        OGLTexture texture;
+        std::array<Tegra::Texture::SwizzleSource, 4> swizzle{
+            Tegra::Texture::SwizzleSource::R, Tegra::Texture::SwizzleSource::G,
+            Tegra::Texture::SwizzleSource::B, Tegra::Texture::SwizzleSource::A};
+    };
+
+    void ApplySwizzle(TextureView& texture_view, Tegra::Texture::SwizzleSource x_source,
+                      Tegra::Texture::SwizzleSource y_source,
+                      Tegra::Texture::SwizzleSource z_source,
+                      Tegra::Texture::SwizzleSource w_source);
+
+    TextureView CreateTextureView(GLenum target) const;
+
+    std::pair<std::reference_wrapper<TextureView>, GLenum> GetTextureView(
+        Tegra::Shader::TextureType texture_type, bool is_array);
+
+    CachedSurface& surface;
+    const ViewKey key;
+    const SurfaceParams params;
+
+    TextureView texture_view_1d;
+    TextureView texture_view_1d_array;
+    TextureView texture_view_2d;
+    TextureView texture_view_2d_array;
+    TextureView texture_view_3d;
+    TextureView texture_view_cube;
+    TextureView texture_view_cube_array;
+};
+
+class TextureCacheOpenGL final : public TextureCacheBase {
+public:
+    explicit TextureCacheOpenGL(Core::System& system, VideoCore::RasterizerInterface& rasterizer);
+    ~TextureCacheOpenGL();
+
+protected:
+    CachedSurfaceView* TryFastGetSurfaceView(VAddr cpu_addr, u8* host_ptr,
+                                             const SurfaceParams& params, bool preserve_contents,
+                                             const std::vector<CachedSurface*>& overlaps);
+
+    std::unique_ptr<CachedSurface> CreateSurface(const SurfaceParams& params);
+};
+
+} // namespace OpenGL
-- 
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