GPU/HW: Add D3D11 renderer and refactor host interface/display

src/duckstation/opengl_host_display.h

@@ -0,0 +1,64 @@
+#pragma once
+#include "common/gl/program.h"
+#include "common/gl/texture.h"
+#include "core/host_display.h"
+#include <SDL.h>
+#include <memory>
+
+class OpenGLHostDisplay final : public HostDisplay
+{
+public:
+  OpenGLHostDisplay(SDL_Window* window);
+  ~OpenGLHostDisplay();
+
+  static std::unique_ptr<HostDisplay> Create(SDL_Window* window);
+
+  RenderAPI GetRenderAPI() const override;
+  void* GetHostRenderDevice() const override;
+  void* GetHostRenderContext() const override;
+
+  std::unique_ptr<HostDisplayTexture> CreateTexture(u32 width, u32 height, const void* data, u32 data_stride,
+                                                    bool dynamic) override;
+  void UpdateTexture(HostDisplayTexture* texture, u32 x, u32 y, u32 width, u32 height, const void* data,
+                     u32 data_stride) override;
+
+  void SetDisplayTexture(void* texture, u32 offset_x, u32 offset_y, u32 width, u32 height, u32 texture_width,
+                         u32 texture_height, float aspect_ratio) override;
+  void SetDisplayLinearFiltering(bool enabled) override;
+
+  void SetVSync(bool enabled) override;
+
+  std::tuple<u32, u32> GetWindowSize() const override;
+  void WindowResized() override;
+
+private:
+  bool CreateGLContext();
+  bool CreateImGuiContext();
+  bool CreateGLResources();
+
+  void Render();
+  void RenderDisplay();
+
+  SDL_Window* m_window = nullptr;
+  SDL_GLContext m_gl_context = nullptr;
+  int m_window_width = 0;
+  int m_window_height = 0;
+
+  std::unique_ptr<GL::Texture> m_app_icon_texture = nullptr;
+
+  GL::Program m_display_program;
+  GLuint m_display_vao = 0;
+  GLuint m_display_texture_id = 0;
+  u32 m_display_offset_x = 0;
+  u32 m_display_offset_y = 0;
+  u32 m_display_width = 0;
+  u32 m_display_height = 0;
+  u32 m_display_texture_width = 0;
+  u32 m_display_texture_height = 0;
+  float m_display_aspect_ratio = 1.0f;
+  GLuint m_display_nearest_sampler = 0;
+  GLuint m_display_linear_sampler = 0;
+
+  bool m_display_texture_changed = false;
+  bool m_display_linear_filtering = false;
+};