win32_v.h

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#ifndef VIDEO_WIN32_H
#define VIDEO_WIN32_H
 
#include "video_driver.hpp"
#include <mutex>
#include <condition_variable>
#include <windows.h>

class VideoDriver_Win32Base : public VideoDriver {
public:
  VideoDriver_Win32Base(bool uses_hardware_acceleration = false) : VideoDriver(uses_hardware_acceleration), main_wnd(nullptr), fullscreen(false), buffer_locked(false) {}
 
  void Stop() override;
 
  void MakeDirty(int left, int top, int width, int height) override;
 
  void MainLoop() override;
 
  bool ChangeResolution(int w, int h) override;
 
  bool ToggleFullscreen(bool fullscreen) override;
 
  void ClaimMousePointer() override;
 
  void EditBoxLostFocus() override;
 
  std::vector<int> GetListOfMonitorRefreshRates() override;
 
protected:
  HWND main_wnd;          
  bool fullscreen;        
  bool has_focus = false; 
  Rect dirty_rect;        
  int width = 0;          
  int height = 0;         
  int width_org = 0;      
  int height_org = 0;     
 
  bool buffer_locked;     
 
  Dimension GetScreenSize() const override;
  void InputLoop() override;
  bool LockVideoBuffer() override;
  void UnlockVideoBuffer() override;
  void CheckPaletteAnim() override;
  bool PollEvent() override;
 
  void Initialize();
  bool MakeWindow(bool full_screen, bool resize = true);
  void ClientSizeChanged(int w, int h, bool force = false);
 
  virtual uint8_t GetFullscreenBpp();

  virtual bool AllocateBackingStore(int w, int h, bool force = false) = 0;

  virtual void *GetVideoPointer() = 0;

  virtual void ReleaseVideoPointer() {}

  virtual void PaletteChanged(HWND hWnd) = 0;
 
private:
  friend LRESULT CALLBACK WndProcGdi(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
};

class VideoDriver_Win32GDI : public VideoDriver_Win32Base {
public:
  VideoDriver_Win32GDI() : dib_sect(nullptr), gdi_palette(nullptr), buffer_bits(nullptr) {}
 
  std::optional<std::string_view> Start(const StringList &param) override;
 
  void Stop() override;
 
  bool AfterBlitterChange() override;
 
  std::string_view GetName() const override { return "win32"; }
 
protected:
  HBITMAP  dib_sect;      
  HPALETTE gdi_palette;   
  void     *buffer_bits;  
 
  void Paint() override;
  void *GetVideoPointer() override { return this->buffer_bits; }
 
  bool AllocateBackingStore(int w, int h, bool force = false) override;
  void PaletteChanged(HWND hWnd) override;
  void MakePalette();
  void UpdatePalette(HDC dc, uint start, uint count);
 
#ifdef _DEBUG
public:
  static int RedrawScreenDebug();
#endif
};

class FVideoDriver_Win32GDI : public DriverFactoryBase {
public:
  FVideoDriver_Win32GDI() : DriverFactoryBase(Driver::DT_VIDEO, 9, "win32", "Win32 GDI Video Driver") {}
  std::unique_ptr<Driver> CreateInstance() const override { return std::make_unique<VideoDriver_Win32GDI>(); }
};
 
#ifdef WITH_OPENGL

class VideoDriver_Win32OpenGL : public VideoDriver_Win32Base {
public:
  VideoDriver_Win32OpenGL() : VideoDriver_Win32Base(true), dc(nullptr), gl_rc(nullptr), anim_buffer(nullptr), driver_info(this->GetName()) {}
 
  std::optional<std::string_view> Start(const StringList &param) override;
 
  void Stop() override;
 
  bool ToggleFullscreen(bool fullscreen) override;
 
  bool AfterBlitterChange() override;
 
  bool HasEfficient8Bpp() const override { return true; }
 
  bool UseSystemCursor() override { return true; }
 
  void PopulateSystemSprites() override;
 
  void ClearSystemSprites() override;
 
  bool HasAnimBuffer() override { return true; }
  uint8_t *GetAnimBuffer() override { return this->anim_buffer; }
 
  void ToggleVsync(bool vsync) override;
 
  std::string_view GetName() const override { return "win32-opengl"; }
 
  std::string_view GetInfoString() const override { return this->driver_info; }
 
protected:
  HDC    dc;          
  HGLRC  gl_rc;       
  uint8_t *anim_buffer; 
  std::string driver_info; 
 
  uint8_t GetFullscreenBpp() override { return 32; } // OpenGL is always 32 bpp.
 
  void Paint() override;
 
  bool AllocateBackingStore(int w, int h, bool force = false) override;
  void *GetVideoPointer() override;
  void ReleaseVideoPointer() override;
  void PaletteChanged(HWND) override {}
 
  std::optional<std::string_view> AllocateContext();
  void DestroyContext();
};

class FVideoDriver_Win32OpenGL : public DriverFactoryBase {
public:
  FVideoDriver_Win32OpenGL() : DriverFactoryBase(Driver::DT_VIDEO, 10, "win32-opengl", "Win32 OpenGL Video Driver") {}
  std::unique_ptr<Driver> CreateInstance() const override { return std::make_unique<VideoDriver_Win32OpenGL>(); }
 
protected:
  bool UsesHardwareAcceleration() const override { return true; }
};
 
#endif /* WITH_OPENGL */
 
#endif /* VIDEO_WIN32_H */