Method resetDisplay

src/Engine/Screen.cpp:305–453

* Resets the screen surfaces based on the current display options, * as they don't automatically take effect. * @param resetVideo Reset display surface. */

 * @param resetVideo Reset display surface.
 */
void Screen::resetDisplay(bool resetVideo)
{
	int width = Options::displayWidth;
	int height = Options::displayHeight;
#ifdef __linux__
	Uint32 oldFlags = _flags;
#endif
	makeVideoFlags();

	if (!_surface || (_surface && 
		(_surface->getSurface()->format->BitsPerPixel != _bpp || 
		_surface->getSurface()->w != _baseWidth ||
		_surface->getSurface()->h != _baseHeight))) // don't reallocate _surface if not necessary, it's a waste of CPU cycles
	{
		if (_surface) delete _surface;
		_surface = new Surface(_baseWidth, _baseHeight, 0, 0, Screen::isHQXEnabled() ? 32 : 8); // only HQX needs 32bpp for this surface; the OpenGL class has its own 32bpp buffer
		if (_surface->getSurface()->format->BitsPerPixel == 8) _surface->setPalette(deferredPalette);
	}
	SDL_SetColorKey(_surface->getSurface(), 0, 0); // turn off color key! 

	if (resetVideo || _screen->format->BitsPerPixel != _bpp)
	{
#ifdef __linux__
		// Workaround for segfault when switching to opengl
		if (!(oldFlags & SDL_OPENGL) && (_flags & SDL_OPENGL))
		{
			Uint8 cursor = 0;
			char *_oldtitle = 0;
			SDL_WM_GetCaption(&_oldtitle, NULL);
			std::string title(_oldtitle);
			SDL_QuitSubSystem(SDL_INIT_VIDEO);
			SDL_InitSubSystem(SDL_INIT_VIDEO);
			SDL_ShowCursor(SDL_ENABLE);
			SDL_EnableUNICODE(1);
			SDL_WM_SetCaption(title.c_str(), 0);
			SDL_SetCursor(SDL_CreateCursor(&cursor, &cursor, 1,1,0,0));
		}
#endif
		Log(LOG_INFO) << "Attempting to set display to " << width << "x" << height << "x" << _bpp << "...";
		_screen = SDL_SetVideoMode(width, height, _bpp, _flags);
		if (_screen == 0)
		{
			Log(LOG_ERROR) << SDL_GetError();
			Log(LOG_INFO) << "Attempting to set display to default resolution...";
			_screen = SDL_SetVideoMode(640, 400, _bpp, _flags);
			if (_screen == 0)
			{
				throw Exception(SDL_GetError());
			}
		}
		Log(LOG_INFO) << "Display set to " << getWidth() << "x" << getHeight() << "x" << (int)_screen->format->BitsPerPixel << ".";
	}
	else
	{
		clear();
	}

	Options::displayWidth = getWidth();