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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 <http://www.gnu.org/licenses/>.
*/
/** @file sdl2_v.h Base of the SDL2 video driver. */
#ifndef VIDEO_SDL_H
#define VIDEO_SDL_H
#include <condition_variable>
#include "video_driver.hpp"
/** The SDL video driver. */
class VideoDriver_SDL_Base : public VideoDriver {
public:
VideoDriver_SDL_Base() : sdl_window(nullptr) {}
const char *Start(const StringList ¶m) override;
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;
bool AfterBlitterChange() override;
void AcquireBlitterLock() override;
void ReleaseBlitterLock() override;
bool ClaimMousePointer() override;
void EditBoxGainedFocus() override;
void EditBoxLostFocus() override;
const char *GetName() const override { return "sdl"; }
protected:
struct SDL_Window *sdl_window; ///< Main SDL window.
Palette local_palette; ///< Copy of _cur_palette.
bool draw_threaded; ///< Whether the drawing is/may be done in a separate thread.
std::recursive_mutex *draw_mutex = nullptr; ///< Mutex to keep the access to the shared memory controlled.
std::condition_variable_any *draw_signal = nullptr; ///< Signal to draw the next frame.
volatile bool draw_continue; ///< Should we keep continue drawing?
bool buffer_locked; ///< Video buffer was locked by the main thread.
Rect dirty_rect; ///< Rectangle encompassing the dirty area of the video buffer.
Dimension GetScreenSize() const override;
void InputLoop() override;
bool LockVideoBuffer() override;
void UnlockVideoBuffer() override;
void CheckPaletteAnim() override;
bool PollEvent() override;
/** Indicate to the driver the client-side might have changed. */
void ClientSizeChanged(int w, int h, bool force);
/** (Re-)create the backing store. */
virtual bool AllocateBackingStore(int w, int h, bool force = false) = 0;
/** Get a pointer to the video buffer. */
virtual void *GetVideoPointer() = 0;
/** Hand video buffer back to the painting backend. */
virtual void ReleaseVideoPointer() = 0;
/** Create the main window. */
virtual bool CreateMainWindow(uint w, uint h, uint flags = 0);
private:
void LoopOnce();
void MainLoopCleanup();
bool CreateMainSurface(uint w, uint h, bool resize);
const char *Initialize();
#ifdef __EMSCRIPTEN__
/* Convert a constant pointer back to a non-constant pointer to a member function. */
static void EmscriptenLoop(void *self) { ((VideoDriver_SDL_Base *)self)->LoopOnce(); }
#endif
/**
* This is true to indicate that keyboard input is in text input mode, and SDL_TEXTINPUT events are enabled.
*/
bool edit_box_focused;
int startup_display;
std::thread draw_thread;
std::unique_lock<std::recursive_mutex> draw_lock;
static void PaintThreadThunk(VideoDriver_SDL_Base *drv);
};
#endif /* VIDEO_SDL_H */
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