cpp/openttd-patchpack/source Files · src/video/sdl2_default_v.h

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Patric Stout

Remove: [Video] no longer draw in a thread

Drawing in a thread is a bit odd, and often leads to surprising
issues. For example, OpenGL would only allow it if you move the
full context to the thread. Which is not always easily done on
all OSes.
In general, the advise is to handle system events and drawing
from the main thread, and do everything else in other threads.
So, let's be more like other games.

Additionally, putting the drawing routine in a thread was only
done for a few targets.

Upcoming commit will move the GameLoop in a thread, which will
work for all targets.

/*
 * 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_default_v.h Default backend of the SDL2 video driver. */

#ifndef VIDEO_SDL2_DEFAULT_H
#define VIDEO_SDL2_DEFAULT_H

#include "sdl2_v.h"

/** The SDL video driver using default SDL backend. */
class VideoDriver_SDL_Default : public VideoDriver_SDL_Base {
public:
	const char *GetName() const override { return "sdl"; }

protected:
	bool AllocateBackingStore(int w, int h, bool force = false) override;
	void *GetVideoPointer() override;
	void Paint() override;

	void ReleaseVideoPointer() override {}

private:
	void UpdatePalette();
	void MakePalette();
};

/** Factory for the SDL video driver. */
class FVideoDriver_SDL_Default : public DriverFactoryBase {
public:
	FVideoDriver_SDL_Default() : DriverFactoryBase(Driver::DT_VIDEO, 5, "sdl", "SDL Video Driver") {}
	Driver *CreateInstance() const override { return new VideoDriver_SDL_Default(); }
};

#endif /* VIDEO_SDL2_DEFAULT_H */