sdl2_opengl_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>.
 */

 
#include "sdl2_v.h"

class VideoDriver_SDL_OpenGL : public VideoDriver_SDL_Base {
public:
  VideoDriver_SDL_OpenGL() : VideoDriver_SDL_Base(true), gl_context(nullptr), anim_buffer(nullptr) {}
 
  std::optional<std::string_view> Start(const StringList &param) override;
 
  void Stop() override;
 
  bool HasEfficient8Bpp() const override { return true; }
 
  bool UseSystemCursor() override { return true; }
 
  void ClearSystemSprites() override;
 
  void PopulateSystemSprites() 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 "sdl-opengl"; }
 
protected:
  bool AllocateBackingStore(int w, int h, bool force = false) override;
  void *GetVideoPointer() override;
  void ReleaseVideoPointer() override;
  void Paint() override;
  bool CreateMainWindow(uint w, uint h, uint flags) override;
 
private:
  void  *gl_context;  
  uint8_t *anim_buffer; 
 
  std::optional<std::string_view> AllocateContext();
  void DestroyContext();
};

class FVideoDriver_SDL_OpenGL : public DriverFactoryBase {
public:
  FVideoDriver_SDL_OpenGL() : DriverFactoryBase(Driver::Type::Video, 8, "sdl-opengl", "SDL OpenGL Video Driver") {}
  std::unique_ptr<Driver> CreateInstance() const override { return std::make_unique<VideoDriver_SDL_OpenGL>(); }
 
protected:
  bool UsesHardwareAcceleration() const override { return true; }
};