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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <glad/glad.h>
#include "common/common_types.h"
#include "common/math_util.h"
#include "core/hw/gpu.h"
#include "video_core/renderer_base.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_state.h"
class EmuWindow;
/// Structure used for storing information about the textures for each 3DS screen
struct TextureInfo {
OGLTexture resource;
GLsizei width;
GLsizei height;
GPU::Regs::PixelFormat format;
GLenum gl_format;
GLenum gl_type;
};
/// Structure used for storing information about the display target for each 3DS screen
struct ScreenInfo {
GLuint display_texture;
MathUtil::Rectangle<float> display_texcoords;
TextureInfo texture;
};
class RendererOpenGL : public RendererBase {
public:
RendererOpenGL();
~RendererOpenGL() override;
/// Swap buffers (render frame)
void SwapBuffers() override;
/**
* Set the emulator window to use for renderer
* @param window EmuWindow handle to emulator window to use for rendering
*/
void SetWindow(EmuWindow* window) override;
/// Initialize the renderer
bool Init() override;
/// Shutdown the renderer
void ShutDown() override;
private:
void InitOpenGLObjects();
void ConfigureFramebufferTexture(TextureInfo& texture,
const GPU::Regs::FramebufferConfig& framebuffer);
void DrawScreens();
void DrawSingleScreen(const ScreenInfo& screen_info, float x, float y, float w, float h);
void UpdateFramerate();
// Loads framebuffer from emulated memory into the display information structure
void LoadFBToScreenInfo(const GPU::Regs::FramebufferConfig& framebuffer,
ScreenInfo& screen_info);
// Fills active OpenGL texture with the given RGB color.
void LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color_b, const TextureInfo& texture);
EmuWindow* render_window; ///< Handle to render window
OpenGLState state;
// OpenGL object IDs
OGLVertexArray vertex_array;
OGLBuffer vertex_buffer;
OGLShader shader;
/// Display information for top and bottom screens respectively
std::array<ScreenInfo, 2> screen_infos;
// Shader uniform location indices
GLuint uniform_modelview_matrix;
GLuint uniform_color_texture;
// Shader attribute input indices
GLuint attrib_position;
GLuint attrib_tex_coord;
};
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