1 files changed, 372 insertions, 514 deletions

diff --git a/backends/graphics/openglsdl/openglsdl-graphics.cpp b/backends/graphics/openglsdl/openglsdl-graphics.cpp
index c5605cae87..925237b75e 100644
--- a/backends/graphics/openglsdl/openglsdl-graphics.cpp
+++ b/backends/graphics/openglsdl/openglsdl-graphics.cpp
@@ -8,45 +8,42 @@
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
-
+ *
  * This program 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 this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  *
  */
 
-#include "common/scummsys.h"
-
-#if defined(SDL_BACKEND) && defined(USE_OPENGL)
-
 #include "backends/graphics/openglsdl/openglsdl-graphics.h"
-#include "backends/platform/sdl/sdl.h"
-#include "common/config-manager.h"
+
 #include "common/textconsole.h"
+#include "common/config-manager.h"
+#ifdef USE_OSD
 #include "common/translation.h"
+#endif
 
-OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(SdlEventSource *eventSource)
-	:
-	SdlGraphicsManager(eventSource),
-	_hwscreen(0),
-	_screenResized(false),
-	_activeFullscreenMode(-2),
-	_lastFullscreenModeWidth(0),
-	_lastFullscreenModeHeight(0),
-	_desktopWidth(0),
-	_desktopHeight(0),
-	_ignoreResizeFrames(0) {
-
+OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(uint desktopWidth, uint desktopHeight, SdlEventSource *eventSource)
+    : SdlGraphicsManager(eventSource), _lastVideoModeLoad(0), _hwScreen(nullptr), _lastRequestedWidth(0), _lastRequestedHeight(0),
+      _graphicsScale(2), _ignoreLoadVideoMode(false), _gotResize(false), _wantsFullScreen(false), _ignoreResizeEvents(0),
+      _desiredFullscreenWidth(0), _desiredFullscreenHeight(0) {
 	// Initialize SDL video subsystem
 	if (SDL_InitSubSystem(SDL_INIT_VIDEO) == -1) {
 		error("Could not initialize SDL: %s", SDL_GetError());
 	}
 
+	// Setup OpenGL attributes for SDL
+	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
+	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
+	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
 	// This is also called in initSDL(), but initializing graphics
 	// may reset it.
 	SDL_EnableUNICODE(1);
@@ -54,27 +51,41 @@ OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(SdlEventSource *eventSource)
 	// Disable OS cursor
 	SDL_ShowCursor(SDL_DISABLE);
 
-	// Get desktop resolution
-	// TODO: In case the OpenGL manager is created *after* a plain SDL manager
-	// has been used, this will return the last setup graphics mode rather
-	// than the desktop resolution. We should really look into a way to
-	// properly retrieve the desktop resolution.
-	const SDL_VideoInfo *videoInfo = SDL_GetVideoInfo();
-	if (videoInfo->current_w > 0 && videoInfo->current_h > 0) {
-		_desktopWidth = videoInfo->current_w;
-		_desktopHeight = videoInfo->current_h;
+	// Retrieve a list of working fullscreen modes
+	const SDL_Rect *const *availableModes = SDL_ListModes(NULL, SDL_OPENGL | SDL_FULLSCREEN);
+	if (availableModes != (void *)-1) {
+		for (;*availableModes; ++availableModes) {
+			const SDL_Rect *mode = *availableModes;
+
+			_fullscreenVideoModes.push_back(VideoMode(mode->w, mode->h));
+		}
+
+		// Sort the modes in ascending order.
+		Common::sort(_fullscreenVideoModes.begin(), _fullscreenVideoModes.end());
+	}
+
+	// In case SDL is fine with every mode we will force the desktop mode.
+	// TODO? We could also try to add some default resolutions here.
+	if (_fullscreenVideoModes.empty() && desktopWidth && desktopHeight) {
+		_fullscreenVideoModes.push_back(VideoMode(desktopWidth, desktopHeight));
 	}
 
-	if (ConfMan.hasKey("last_fullscreen_mode_width") && ConfMan.hasKey("last_fullscreen_mode_height")) {
-		_lastFullscreenModeWidth = ConfMan.getInt("last_fullscreen_mode_width");
-		_lastFullscreenModeHeight = ConfMan.getInt("last_fullscreen_mode_height");
+	// Get information about display sizes from the previous runs.
+	if (ConfMan.hasKey("last_fullscreen_mode_width", Common::ConfigManager::kApplicationDomain) && ConfMan.hasKey("last_fullscreen_mode_height", Common::ConfigManager::kApplicationDomain)) {
+		_desiredFullscreenWidth  = ConfMan.getInt("last_fullscreen_mode_width", Common::ConfigManager::kApplicationDomain);
+		_desiredFullscreenHeight = ConfMan.getInt("last_fullscreen_mode_height", Common::ConfigManager::kApplicationDomain);
+	} else {
+		// Use the desktop resolutions when no previous default has been setup.
+		_desiredFullscreenWidth  = desktopWidth;
+		_desiredFullscreenHeight = desktopHeight;
 	}
 }
 
 OpenGLSdlGraphicsManager::~OpenGLSdlGraphicsManager() {
 	// Unregister the event observer
-	if (g_system->getEventManager()->getEventDispatcher() != NULL)
+	if (g_system->getEventManager()->getEventDispatcher()) {
 		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
+	}
 }
 
 void OpenGLSdlGraphicsManager::initEventObserver() {
@@ -83,421 +94,270 @@ void OpenGLSdlGraphicsManager::initEventObserver() {
 }
 
 bool OpenGLSdlGraphicsManager::hasFeature(OSystem::Feature f) {
-	return
-		(f == OSystem::kFeatureFullscreenMode) ||
-		(f == OSystem::kFeatureIconifyWindow) ||
-		OpenGLGraphicsManager::hasFeature(f);
+	switch (f) {
+	case OSystem::kFeatureFullscreenMode:
+	case OSystem::kFeatureIconifyWindow:
+		return true;
+
+	default:
+		return OpenGLGraphicsManager::hasFeature(f);
+	}
 }
 
 void OpenGLSdlGraphicsManager::setFeatureState(OSystem::Feature f, bool enable) {
 	switch (f) {
+	case OSystem::kFeatureFullscreenMode:
+		assert(getTransactionMode() != kTransactionNone);
+		_wantsFullScreen = enable;
+		// When we switch to windowed mode we will ignore resize events. This
+		// avoids bad resizes to the (former) fullscreen resolution.
+		if (!enable) {
+			_ignoreResizeEvents = 10;
+		}
+		break;
+
 	case OSystem::kFeatureIconifyWindow:
-		if (enable)
+		if (enable) {
 			SDL_WM_IconifyWindow();
+		}
 		break;
+
 	default:
 		OpenGLGraphicsManager::setFeatureState(f, enable);
 	}
 }
 
-#ifdef USE_RGB_COLOR
-
-Common::List<Graphics::PixelFormat> OpenGLSdlGraphicsManager::getSupportedFormats() const {
-	assert(!_supportedFormats.empty());
-	return _supportedFormats;
-}
-
-void OpenGLSdlGraphicsManager::detectSupportedFormats() {
-
-	// Clear old list
-	_supportedFormats.clear();
-
-	// Some tables with standard formats that we always list
-	// as "supported". If frontend code tries to use one of
-	// these, we will perform the necessary format
-	// conversion in the background. Of course this incurs a
-	// performance hit, but on desktop ports this should not
-	// matter. We still push the currently active format to
-	// the front, so if frontend code just uses the first
-	// available format, it will get one that is "cheap" to
-	// use.
-	const Graphics::PixelFormat RGBList[] = {
-#if defined(ENABLE_32BIT)
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0), // RGBA8888
-#ifndef USE_GLES
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24), // ARGB8888
-#endif
-		Graphics::PixelFormat(3, 8, 8, 8, 0, 16, 8, 0, 0),  // RGB888
-#endif
-		Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0),  // RGB565
-		Graphics::PixelFormat(2, 5, 5, 5, 1, 11, 6, 1, 0),  // RGB5551
-		Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0),  // RGB555
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 12, 8, 4, 0),  // RGBA4444
-#ifndef USE_GLES
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 8, 4, 0, 12)   // ARGB4444
-#endif
-	};
-#ifndef USE_GLES
-	const Graphics::PixelFormat BGRList[] = {
-#ifdef ENABLE_32BIT
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24), // ABGR8888
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 8, 16, 24, 0), // BGRA8888
-		Graphics::PixelFormat(3, 8, 8, 8, 0, 0, 8, 16, 0),  // BGR888
-#endif
-		Graphics::PixelFormat(2, 5, 6, 5, 0, 0, 5, 11, 0),  // BGR565
-		Graphics::PixelFormat(2, 5, 5, 5, 1, 1, 6, 11, 0),  // BGRA5551
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 0, 4, 8, 12),  // ABGR4444
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 4, 8, 12, 0)   // BGRA4444
-	};
-#endif
-
-	Graphics::PixelFormat format = Graphics::PixelFormat::createFormatCLUT8();
-	if (_hwscreen) {
-		// Get our currently set hardware format
-		format = Graphics::PixelFormat(_hwscreen->format->BytesPerPixel,
-			8 - _hwscreen->format->Rloss, 8 - _hwscreen->format->Gloss,
-			8 - _hwscreen->format->Bloss, 8 - _hwscreen->format->Aloss,
-			_hwscreen->format->Rshift, _hwscreen->format->Gshift,
-			_hwscreen->format->Bshift, _hwscreen->format->Ashift);
-
-		// Workaround to SDL not providing an accurate Aloss value on Mac OS X.
-		if (_hwscreen->format->Amask == 0)
-			format.aLoss = 8;
-
-		// Push it first, as the prefered format if available
-		for (int i = 0; i < ARRAYSIZE(RGBList); i++) {
-			if (RGBList[i] == format) {
-				_supportedFormats.push_back(format);
-				break;
-			}
-		}
-#ifndef USE_GLES
-		for (int i = 0; i < ARRAYSIZE(BGRList); i++) {
-			if (BGRList[i] == format) {
-				_supportedFormats.push_back(format);
-				break;
-			}
+bool OpenGLSdlGraphicsManager::getFeatureState(OSystem::Feature f) {
+	switch (f) {
+	case OSystem::kFeatureFullscreenMode:
+		if (_hwScreen) {
+			return (_hwScreen->flags & SDL_FULLSCREEN) != 0;
+		} else {
+			return _wantsFullScreen;
 		}
-#endif
-	}
 
-	// Push some RGB formats
-	for (int i = 0; i < ARRAYSIZE(RGBList); i++) {
-		if (_hwscreen && (RGBList[i].bytesPerPixel > format.bytesPerPixel))
-			continue;
-		if (RGBList[i] != format)
-			_supportedFormats.push_back(RGBList[i]);
-	}
-#ifndef USE_GLES
-	// Push some BGR formats
-	for (int i = 0; i < ARRAYSIZE(BGRList); i++) {
-		if (_hwscreen && (BGRList[i].bytesPerPixel > format.bytesPerPixel))
-			continue;
-		if (BGRList[i] != format)
-			_supportedFormats.push_back(BGRList[i]);
+	default:
+		return OpenGLGraphicsManager::getFeatureState(f);
 	}
-#endif
-	_supportedFormats.push_back(Graphics::PixelFormat::createFormatCLUT8());
 }
 
-#endif
+bool OpenGLSdlGraphicsManager::setGraphicsMode(int mode) {
+	// HACK: This is stupid but the SurfaceSDL backend defaults to 2x. This
+	// assures that the launcher (which requests 320x200) has a reasonable
+	// size. It also makes small games have a reasonable size (i.e. at least
+	// 640x400). We follow the same logic here until we have a better way to
+	// give hints to our backend for that.
+	_graphicsScale = 2;
 
-void OpenGLSdlGraphicsManager::setInternalMousePosition(int x, int y) {
-	SDL_WarpMouse(x, y);
+	return OpenGLGraphicsManager::setGraphicsMode(mode);
 }
 
-void OpenGLSdlGraphicsManager::updateScreen() {
-	if (_ignoreResizeFrames)
-		_ignoreResizeFrames -= 1;
+void OpenGLSdlGraphicsManager::resetGraphicsScale() {
+	OpenGLGraphicsManager::resetGraphicsScale();
 
-	OpenGLGraphicsManager::updateScreen();
+	// HACK: See OpenGLSdlGraphicsManager::setGraphicsMode.
+	_graphicsScale = 1;
 }
 
-//
-// Intern
-//
-
-bool OpenGLSdlGraphicsManager::setupFullscreenMode() {
-	SDL_Rect const* const*availableModes = SDL_ListModes(NULL, SDL_FULLSCREEN | SDL_OPENGL);
-
-	// SDL_ListModes() returns -1 in case any dimension is okay. In that
-	// case we'll reuse the current desktop resolution for fullscreen.
-	if (availableModes == (void *)-1) {
-		_videoMode.hardwareWidth = _desktopWidth;
-		_videoMode.hardwareHeight = _desktopHeight;
-		_activeFullscreenMode = -2;
-		return true;
-	}
-
-	// If -2, autodetect the fullscreen mode
-	// The last used fullscreen mode will be prioritized, if there is no last fullscreen
-	// mode, the desktop resolution will be used, and in case the desktop resolution
-	// is not available as a fullscreen mode, the one with smallest metric will be selected.
-	if (_activeFullscreenMode == -2) {
-		// Desktop resolution
-		int desktopModeIndex = -1;
-
-		// Best metric mode
-		const SDL_Rect *bestMode = availableModes[0];
-		int bestModeIndex = 0;
-		uint bestMetric = (uint)-1;
-
-		// Iterate over all available fullscreen modes
-		for (int i = 0; const SDL_Rect *mode = availableModes[i]; i++) {
-			// Try to setup the last used fullscreen mode
-			if (mode->w == _lastFullscreenModeWidth && mode->h == _lastFullscreenModeHeight) {
-				_videoMode.hardwareWidth = _lastFullscreenModeWidth;
-				_videoMode.hardwareHeight = _lastFullscreenModeHeight;
-				_activeFullscreenMode = i;
-				return true;
-			}
+#ifdef USE_RGB_COLOR
+Common::List<Graphics::PixelFormat> OpenGLSdlGraphicsManager::getSupportedFormats() const {
+	Common::List<Graphics::PixelFormat> formats;
 
-			if (mode->w == _desktopWidth && mode->h == _desktopHeight)
-				desktopModeIndex = i;
+	// RGBA8888
+	formats.push_back(Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
+	// RGB565
+	formats.push_back(Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0));
+	// RGBA5551
+	formats.push_back(Graphics::PixelFormat(2, 5, 5, 5, 1, 11, 6, 1, 0));
+	// RGBA4444
+	formats.push_back(Graphics::PixelFormat(2, 4, 4, 4, 4, 12, 8, 4, 0));
 
-			if (mode->w < _videoMode.overlayWidth)
-				continue;
-			if (mode->h < _videoMode.overlayHeight)
-				continue;
+#ifndef USE_GLES
+	// ARGB8888, this should not be here, but Sword25 requires it. :-/
+	formats.push_back(Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24));
 
-			uint metric = mode->w * mode->h - _videoMode.overlayWidth * _videoMode.overlayHeight;
-			if (metric < bestMetric) {
-				bestMode = mode;
-				bestMetric = metric;
-				bestModeIndex = i;
-			}
-		}
+	// RGB555, this is used by SCUMM HE 16 bit games.
+	formats.push_back(Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0));
+#endif
 
-		if (desktopModeIndex >= 0) {
-			_videoMode.hardwareWidth = _desktopWidth;
-			_videoMode.hardwareHeight = _desktopHeight;
+	formats.push_back(Graphics::PixelFormat::createFormatCLUT8());
 
-			_activeFullscreenMode = desktopModeIndex;
-			return true;
-		} else if (bestMode) {
-			_videoMode.hardwareWidth = bestMode->w;
-			_videoMode.hardwareHeight = bestMode->h;
+	return formats;
+}
+#endif
 
-			_activeFullscreenMode = bestModeIndex;
-			return true;
-		}
-	} else {
-		// Use last fullscreen mode if looping backwards from the first mode
-		if (_activeFullscreenMode == -1) {
-			do {
-				_activeFullscreenMode++;
-			} while(availableModes[_activeFullscreenMode]);
-			_activeFullscreenMode--;
-		}
+void OpenGLSdlGraphicsManager::updateScreen() {
+	if (_ignoreResizeEvents) {
+		--_ignoreResizeEvents;
+	}
 
-		// Use first fullscreen mode if looping from last mode
-		if (!availableModes[_activeFullscreenMode])
-			_activeFullscreenMode = 0;
+	OpenGLGraphicsManager::updateScreen();
 
-		// Check if the fullscreen mode is valid
-		if (availableModes[_activeFullscreenMode]) {
-			_videoMode.hardwareWidth = availableModes[_activeFullscreenMode]->w;
-			_videoMode.hardwareHeight = availableModes[_activeFullscreenMode]->h;
-			return true;
-		}
-	}
+	// Swap OpenGL buffers
+	SDL_GL_SwapBuffers();
+}
 
-	// Could not find any suiting fullscreen mode, return false.
-	return false;
+void OpenGLSdlGraphicsManager::notifyVideoExpose() {
 }
 
-bool OpenGLSdlGraphicsManager::loadGFXMode() {
-	// If the screen was resized, do not change its size
-	if (!_screenResized) {
-		const int scaleFactor = getScale();
-		_videoMode.overlayWidth = _videoMode.hardwareWidth = _videoMode.screenWidth * scaleFactor;
-		_videoMode.overlayHeight = _videoMode.hardwareHeight = _videoMode.screenHeight * scaleFactor;
-
-		// The only modes where we need to adapt the aspect ratio are 320x200
-		// and 640x400. That is since our aspect ratio correction in fact is
-		// only used to ensure that the original pixel size aspect for these
-		// modes is used.
-		// (Non-square pixels on old monitors vs square pixel on new ones).
-		if (_videoMode.aspectRatioCorrection) {
-		 	if (_videoMode.screenWidth == 320 && _videoMode.screenHeight == 200)
-				_videoMode.overlayHeight = _videoMode.hardwareHeight = 240 * scaleFactor;
-			else if (_videoMode.screenWidth == 640 && _videoMode.screenHeight == 400)
-				_videoMode.overlayHeight = _videoMode.hardwareHeight = 480 * scaleFactor;
+void OpenGLSdlGraphicsManager::notifyResize(const uint width, const uint height) {
+	if (!_ignoreResizeEvents && _hwScreen && !(_hwScreen->flags & SDL_FULLSCREEN)) {
+		// We save that we handled a resize event here. We need to know this
+		// so we do not overwrite the users requested window size whenever we
+		// switch aspect ratio or similar.
+		_gotResize = true;
+		if (!setupMode(width, height)) {
+			warning("OpenGLSdlGraphicsManager::notifyResize: Resize failed ('%s')", SDL_GetError());
+			g_system->quit();
 		}
 	}
+}
 
-	_screenResized = false;
+void OpenGLSdlGraphicsManager::transformMouseCoordinates(Common::Point &point) {
+	adjustMousePosition(point.x, point.y);
+}
 
-	// Setup OpenGL attributes for SDL
-	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
-	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
-	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
-	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
-	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+void OpenGLSdlGraphicsManager::notifyMousePos(Common::Point mouse) {
+	setMousePosition(mouse.x, mouse.y);
+}
 
-	const bool isFullscreen = getFullscreenMode();
+void OpenGLSdlGraphicsManager::setInternalMousePosition(int x, int y) {
+	SDL_WarpMouse(x, y);
+}
 
-	// In case we have an fullscreen mode and we are not in a rollback, detect
-	// a proper mode to use. In case we are in a rollback, we already detected
-	// a proper mode when setting up that mode, thus there is no need to run
-	// the detection again.
-	if (isFullscreen && _transactionMode != kTransactionRollback) {
-		if (!setupFullscreenMode())
-			// Failed setuping a fullscreen mode
-			return false;
+bool OpenGLSdlGraphicsManager::loadVideoMode(uint requestedWidth, uint requestedHeight, const Graphics::PixelFormat &format) {
+	// In some cases we might not want to load the requested video mode. This
+	// will assure that the window size is not altered.
+	if (_ignoreLoadVideoMode) {
+		_ignoreLoadVideoMode = false;
+		return true;
 	}
 
-	_videoMode.overlayWidth = _videoMode.hardwareWidth;
-	_videoMode.overlayHeight = _videoMode.hardwareHeight;
-
-	uint32 flags = SDL_OPENGL;
-
-	if (isFullscreen)
-		flags |= SDL_FULLSCREEN;
-	else
-		flags |= SDL_RESIZABLE;
+	// This function should never be called from notifyResize thus we know
+	// that the requested size came from somewhere else.
+	_gotResize = false;
 
-	// Create our window
-	_hwscreen = SDL_SetVideoMode(_videoMode.hardwareWidth, _videoMode.hardwareHeight, 32, flags);
-#ifdef USE_RGB_COLOR
-	detectSupportedFormats();
-#endif
+	// Save the requested dimensions.
+	_lastRequestedWidth  = requestedWidth;
+	_lastRequestedHeight = requestedHeight;
 
-	if (_hwscreen == NULL) {
-		// DON'T use error(), as this tries to bring up the debug
-		// console, which WON'T WORK now that _hwscreen is hosed.
+	// Apply the currently saved scale setting.
+	requestedWidth  *= _graphicsScale;
+	requestedHeight *= _graphicsScale;
 
-		if (!_oldVideoMode.setup) {
-			warning("SDL_SetVideoMode says we can't switch to that mode (%s)", SDL_GetError());
-			g_system->quit();
-		} else
-			// Cancel GFX load, and go back to last mode
-			return false;
-	}
+	// Set up the mode.
+	return setupMode(requestedWidth, requestedHeight);
+}
 
-	// Check if the screen is BGR format
-	setFormatIsBGR(_hwscreen->format->Rshift != 0);
+bool OpenGLSdlGraphicsManager::setupMode(uint width, uint height) {
+	// In case we request a fullscreen mode we will use the mode the user
+	// has chosen last time or the biggest mode available.
+	if (_wantsFullScreen) {
+		if (_desiredFullscreenWidth && _desiredFullscreenHeight) {
+			// In case only a distinct set of modes is available we check
+			// whether the requested mode is actually available.
+			if (!_fullscreenVideoModes.empty()) {
+				VideoModeArray::const_iterator i = Common::find(_fullscreenVideoModes.begin(),
+				                                                _fullscreenVideoModes.end(),
+				                                                VideoMode(_desiredFullscreenWidth, _desiredFullscreenHeight));
+				// It's not available fall back to default.
+				if (i == _fullscreenVideoModes.end()) {
+					_desiredFullscreenWidth = 0;
+					_desiredFullscreenHeight = 0;
+				}
+			}
+		}
 
-	if (isFullscreen) {
-		_lastFullscreenModeWidth = _videoMode.hardwareWidth;
-		_lastFullscreenModeHeight = _videoMode.hardwareHeight;
-		ConfMan.setInt("last_fullscreen_mode_width", _lastFullscreenModeWidth);
-		ConfMan.setInt("last_fullscreen_mode_height", _lastFullscreenModeHeight);
-	}
+		// In case no desired mode has been set we default to the biggest mode
+		// available or the requested mode in case we don't know any
+		// any fullscreen modes.
+		if (!_desiredFullscreenWidth || !_desiredFullscreenHeight) {
+			if (!_fullscreenVideoModes.empty()) {
+				VideoModeArray::const_iterator i = _fullscreenVideoModes.end();
+				--i;
+	
+				_desiredFullscreenWidth  = i->width;
+				_desiredFullscreenHeight = i->height;
+			} else {
+				_desiredFullscreenWidth  = width;
+				_desiredFullscreenHeight = height;
+			}
+		}
 
-	// Call and return parent implementation of this method
-	return OpenGLGraphicsManager::loadGFXMode();
-}
+		// Remember our choice.
+		ConfMan.setInt("last_fullscreen_mode_width", _desiredFullscreenWidth, Common::ConfigManager::kApplicationDomain);
+		ConfMan.setInt("last_fullscreen_mode_height", _desiredFullscreenHeight, Common::ConfigManager::kApplicationDomain);
 
-void OpenGLSdlGraphicsManager::unloadGFXMode() {
-	if (_hwscreen) {
-		SDL_FreeSurface(_hwscreen);
-		_hwscreen = NULL;
+		// Use our choice.
+		width  = _desiredFullscreenWidth;
+		height = _desiredFullscreenHeight;
 	}
-}
 
-void OpenGLSdlGraphicsManager::internUpdateScreen() {
-	// Call to parent implementation of this method
-	OpenGLGraphicsManager::internUpdateScreen();
-
-	// Swap OpenGL buffers
-	SDL_GL_SwapBuffers();
-}
-
-#ifdef USE_OSD
-void OpenGLSdlGraphicsManager::displayModeChangedMsg() {
-	const char *newModeName = getCurrentModeName();
-	if (newModeName) {
-		const int scaleFactor = getScale();
-
-		Common::String osdMessage = Common::String::format(
-			"%s: %s\n%d x %d -> %d x %d",
-			_("Current display mode"),
-			newModeName,
-			_videoMode.screenWidth * scaleFactor,
-			_videoMode.screenHeight * scaleFactor,
-			_hwscreen->w, _hwscreen->h
-			);
-		displayMessageOnOSD(osdMessage.c_str());
+	// WORKAROUND: Working around infamous SDL bugs when switching
+	// resolutions too fast. This might cause the event system to supply
+	// incorrect mouse position events otherwise.
+	// Reference: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=665779
+	const uint32 curTime = SDL_GetTicks();
+	if (_hwScreen && (curTime < _lastVideoModeLoad || curTime - _lastVideoModeLoad < 100)) {
+		for (int i = 10; i > 0; --i) {
+			SDL_PumpEvents();
+			SDL_Delay(10);
+		}
 	}
-}
-void OpenGLSdlGraphicsManager::displayScaleChangedMsg() {
-	const int scaleFactor = getScale();
-	Common::String osdMessage = Common::String::format(
-		"%s: x%d\n%d x %d -> %d x %d",
-		_("Current scale"),
-		scaleFactor,
-		_videoMode.screenWidth, _videoMode.screenHeight,
-		_videoMode.overlayWidth, _videoMode.overlayHeight
-		);
-	displayMessageOnOSD(osdMessage.c_str());
-}
-#endif
+	_lastVideoModeLoad = curTime;
 
-bool OpenGLSdlGraphicsManager::isHotkey(const Common::Event &event) {
-	if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_ALT)) == (Common::KBD_CTRL|Common::KBD_ALT)) {
-		if (event.kbd.keycode == Common::KEYCODE_PLUS || event.kbd.keycode == Common::KEYCODE_MINUS ||
-			event.kbd.keycode == Common::KEYCODE_KP_PLUS || event.kbd.keycode == Common::KEYCODE_KP_MINUS ||
-			event.kbd.keycode == 'a' || event.kbd.keycode == 'f')
-			return true;
-	} else if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_SHIFT)) == (Common::KBD_CTRL|Common::KBD_SHIFT)) {
-		if (event.kbd.keycode == 'a' || event.kbd.keycode == 'f')
-			return true;
-	} else if ((event.kbd.flags & (Common::KBD_ALT)) == (Common::KBD_ALT) && event.kbd.keycode == 's') {
-		return true;
+	uint32 flags = SDL_OPENGL;
+	if (_wantsFullScreen) {
+		flags |= SDL_FULLSCREEN;
+	} else {
+		flags |= SDL_RESIZABLE;
 	}
-	return false;
-}
 
-void OpenGLSdlGraphicsManager::toggleFullScreen(int loop) {
-	beginGFXTransaction();
-		const bool isFullscreen = getFullscreenMode();
+	_hwScreen = SDL_SetVideoMode(width, height, 32, flags);
 
-		if (isFullscreen && loop) {
-			_activeFullscreenMode += loop;
-			setFullscreenMode(true);
-		} else {
-			_activeFullscreenMode = -2;
-			setFullscreenMode(!isFullscreen);
+	if (!_hwScreen) {
+		// We treat fullscreen requests as a "hint" for now. This means in
+		// case it is not available we simply ignore it.
+		if (_wantsFullScreen) {
+			_hwScreen = SDL_SetVideoMode(width, height, 32, SDL_OPENGL | SDL_RESIZABLE);
 		}
+	}
 
-		// HACK: We need to force a refresh here, since we change the
-		// fullscreen mode.
-		_transactionDetails.needRefresh = true;
-	endGFXTransaction();
-
-	// Ignore resize events for the next 10 frames
-	_ignoreResizeFrames = 10;
+	if (_hwScreen) {
+		const Graphics::PixelFormat rgba8888 = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
+		notifyContextChange(rgba8888, rgba8888);
+		setActualScreenSize(_hwScreen->w, _hwScreen->h);
+	}
 
-#ifdef USE_OSD
-	Common::String osdMessage;
-	if (getFullscreenMode())
-		osdMessage = Common::String::format("%s\n%d x %d",
-			_("Fullscreen mode"),
-			_hwscreen->w, _hwscreen->h
-			);
-	else
-		osdMessage = Common::String::format("%s\n%d x %d",
-			_("Windowed mode"),
-			_hwscreen->w, _hwscreen->h
-			);
-	displayMessageOnOSD(osdMessage.c_str());
-#endif
+	return _hwScreen != nullptr;
 }
 
 bool OpenGLSdlGraphicsManager::notifyEvent(const Common::Event &event) {
 	switch (event.type) {
+	case Common::EVENT_KEYUP:
+		return isHotkey(event);
+
 	case Common::EVENT_KEYDOWN:
 		if (event.kbd.hasFlags(Common::KBD_ALT)) {
-			// Alt-Return and Alt-Enter toggle full screen mode
-			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
-				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
-				toggleFullScreen(0);
+			if (   event.kbd.keycode == Common::KEYCODE_RETURN
+			    || event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
+				// Alt-Return and Alt-Enter toggle full screen mode
+				beginGFXTransaction();
+					setFeatureState(OSystem::kFeatureFullscreenMode, !getFeatureState(OSystem::kFeatureFullscreenMode));
+				endGFXTransaction();
+
+#ifdef USE_OSD
+				if (getFeatureState(OSystem::kFeatureFullscreenMode)) {
+					displayMessageOnOSD("Fullscreen mode");
+				} else {
+					displayMessageOnOSD("Windowed mode");
+				}
+#endif
 				return true;
 			}
 
-			// Alt-S create a screenshot
-			if (event.kbd.keycode == 's') {
+			if (event.kbd.keycode == Common::KEYCODE_s) {
+				// Alt-s creates a screenshot
 				Common::String filename;
 
 				for (int n = 0;; n++) {
@@ -509,169 +369,167 @@ bool OpenGLSdlGraphicsManager::notifyEvent(const Common::Event &event) {
 						break;
 					SDL_RWclose(file);
 				}
-				if (saveScreenshot(filename.c_str()))
-					debug("Saved screenshot '%s'", filename.c_str());
-				else
-					warning("Could not save screenshot");
-				return true;
-			}
-		}
 
-		if (event.kbd.hasFlags(Common::KBD_CTRL|Common::KBD_ALT)) {
-			// Ctrl-Alt-Return and Ctrl-Alt-Enter switch between full screen modes
-			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
-				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
-				toggleFullScreen(1);
+				saveScreenshot(filename.c_str());
+				debug("Saved screenshot '%s'", filename.c_str());
+
 				return true;
 			}
+		} else if (event.kbd.hasFlags(Common::KBD_CTRL | Common::KBD_ALT)) {
+			if (   event.kbd.keycode == Common::KEYCODE_PLUS || event.kbd.keycode == Common::KEYCODE_MINUS
+			    || event.kbd.keycode == Common::KEYCODE_KP_PLUS || event.kbd.keycode == Common::KEYCODE_KP_MINUS) {
+				// Ctrl+Alt+Plus/Minus Increase/decrease the size
+				const int direction = (event.kbd.keycode == Common::KEYCODE_PLUS || event.kbd.keycode == Common::KEYCODE_KP_PLUS) ? +1 : -1;
+
+				if (getFeatureState(OSystem::kFeatureFullscreenMode)) {
+					// In case we are in fullscreen we will choose the previous
+					// or next mode.
+
+					// In case no modes are available we do nothing.
+					if (_fullscreenVideoModes.empty()) {
+						return true;
+					}
+
+					// Look for the current mode.
+					VideoModeArray::const_iterator i = Common::find(_fullscreenVideoModes.begin(),
+					                                                _fullscreenVideoModes.end(),
+					                                                VideoMode(_desiredFullscreenWidth, _desiredFullscreenHeight));
+					if (i == _fullscreenVideoModes.end()) {
+						return true;
+					}
+
+					// Cycle through the modes in the specified direction.
+					if (direction > 0) {
+						++i;
+						if (i == _fullscreenVideoModes.end()) {
+							i = _fullscreenVideoModes.begin();
+						}
+					} else {
+						if (i == _fullscreenVideoModes.begin()) {
+							i = _fullscreenVideoModes.end();
+						}
+						--i;
+					}
+
+					_desiredFullscreenWidth  = i->width;
+					_desiredFullscreenHeight = i->height;
+
+					// Try to setup the mode.
+					if (!setupMode(_lastRequestedWidth, _lastRequestedHeight)) {
+						warning("OpenGLSdlGraphicsManager::notifyEvent: Fullscreen resize failed ('%s')", SDL_GetError());
+						g_system->quit();
+					}
+				} else {
+					// Calculate the next scaling setting. We approximate the
+					// current scale setting in case the user resized the
+					// window. Then we apply the direction change.
+					_graphicsScale = MAX<int>(_hwScreen->w / _lastRequestedWidth, _hwScreen->h / _lastRequestedHeight);
+					_graphicsScale = MAX<int>(_graphicsScale + direction, 1);
+
+					// Since we overwrite a user resize here we reset its
+					// flag here. This makes enabling AR smoother because it
+					// will change the window size like in surface SDL.
+					_gotResize = false;
+
+					// Try to setup the mode.
+					if (!setupMode(_lastRequestedWidth * _graphicsScale, _lastRequestedHeight * _graphicsScale)) {
+						warning("OpenGLSdlGraphicsManager::notifyEvent: Window resize failed ('%s')", SDL_GetError());
+						g_system->quit();
+					}
+				}
 
-			// Ctrl-Alt-a switch between display modes
-			if (event.kbd.keycode == 'a') {
-				beginGFXTransaction();
-					setFeatureState(OSystem::kFeatureAspectRatioCorrection, !getFeatureState(OSystem::kFeatureAspectRatioCorrection));
-				endGFXTransaction();
 #ifdef USE_OSD
-			Common::String osdMessage;
-			if (getFeatureState(OSystem::kFeatureAspectRatioCorrection))
-				osdMessage = Common::String::format("%s\n%d x %d -> %d x %d",
-				        _("Enabled aspect ratio correction"),
-				        _videoMode.screenWidth, _videoMode.screenHeight,
-				        _hwscreen->w, _hwscreen->h);
-			else
-				osdMessage = Common::String::format("%s\n%d x %d -> %d x %d",
-				        _("Disabled aspect ratio correction"),
-				        _videoMode.screenWidth, _videoMode.screenHeight,
-				        _hwscreen->w, _hwscreen->h);
-			displayMessageOnOSD(osdMessage.c_str());
+				const Common::String osdMsg = Common::String::format("Resolution: %dx%d", _hwScreen->w, _hwScreen->h);
+				displayMessageOnOSD(osdMsg.c_str());
 #endif
-				internUpdateScreen();
+
 				return true;
-			}
+			} else if (event.kbd.keycode == Common::KEYCODE_a) {
+				// In case the user changed the window size manually we will
+				// not change the window size again here.
+				_ignoreLoadVideoMode = _gotResize;
 
-			// Ctrl-Alt-f toggles antialiasing
-			if (event.kbd.keycode == 'f') {
+				// Ctrl+Alt+a toggles the aspect ratio correction state.
 				beginGFXTransaction();
-					toggleAntialiasing();
+					setFeatureState(OSystem::kFeatureAspectRatioCorrection, !getFeatureState(OSystem::kFeatureAspectRatioCorrection));
 				endGFXTransaction();
 
+				// Make sure we do not ignore the next resize. This
+				// effectively checks whether loadVideoMode has been called.
+				assert(!_ignoreLoadVideoMode);
+
 #ifdef USE_OSD
-				// TODO: This makes guesses about what internal antialiasing
-				// modes we use, we might want to consider a better way of
-				// displaying information to the user.
-				if (getAntialiasingState())
-					displayMessageOnOSD(_("Active filter mode: Linear"));
-				else
-					displayMessageOnOSD(_("Active filter mode: Nearest"));
+				Common::String osdMsg = "Aspect ratio correction: ";
+				osdMsg += getFeatureState(OSystem::kFeatureAspectRatioCorrection) ? "enabled" : "disabled";
+				displayMessageOnOSD(osdMsg.c_str());
 #endif
+
 				return true;
-			}
+			} else if (event.kbd.keycode == Common::KEYCODE_f) {
+				// Ctrl+Alt+f toggles the graphics modes.
+
+				// We are crazy we will allow the OpenGL base class to
+				// introduce new graphics modes like shaders for special
+				// filtering. If some other OpenGL subclass needs this,
+				// we can think of refactoring this.
+				int mode = getGraphicsMode();
+				const OSystem::GraphicsMode *supportedModes = getSupportedGraphicsModes();
+				const OSystem::GraphicsMode *modeDesc = nullptr;
+
+				// Search the current mode.
+				for (; supportedModes->name; ++supportedModes) {
+					if (supportedModes->id == mode) {
+						modeDesc = supportedModes;
+						break;
+					}
+				}
+				assert(modeDesc);
 
-			SDLKey sdlKey = (SDLKey)event.kbd.keycode;
-
-			// Ctrl+Alt+Plus/Minus Increase/decrease the scale factor
-			if ((sdlKey == SDLK_EQUALS || sdlKey == SDLK_PLUS || sdlKey == SDLK_MINUS ||
-				sdlKey == SDLK_KP_PLUS || sdlKey == SDLK_KP_MINUS)) {
-				int factor = getScale();
-				factor += (sdlKey == SDLK_MINUS || sdlKey == SDLK_KP_MINUS) ? -1 : +1;
-				if (0 < factor && factor < 4) {
-					// Check if the desktop resolution has been detected
-					if (_desktopWidth > 0 && _desktopHeight > 0)
-						// If the new scale factor is too big, do not scale
-						if (_videoMode.screenWidth * factor > _desktopWidth ||
-							_videoMode.screenHeight * factor > _desktopHeight)
-							return false;
-
-					beginGFXTransaction();
-						setScale(factor);
-					endGFXTransaction();
-#ifdef USE_OSD
-					displayScaleChangedMsg();
-#endif
-					return true;
+				// Try to use the next mode in the list.
+				++modeDesc;
+				if (!modeDesc->name) {
+					modeDesc = getSupportedGraphicsModes();
 				}
-			}
 
-			const bool isNormalNumber = (SDLK_1 <= sdlKey && sdlKey <= SDLK_3);
-			const bool isKeypadNumber = (SDLK_KP1 <= sdlKey && sdlKey <= SDLK_KP3);
+				// Never ever try to resize the window when we simply want to
+				// switch the graphics mode. This assures that the window size
+				// does not change.
+				_ignoreLoadVideoMode = true;
+
+				beginGFXTransaction();
+					setGraphicsMode(modeDesc->id);
+				endGFXTransaction();
+
+				// Make sure we do not ignore the next resize. This
+				// effectively checks whether loadVideoMode has been called.
+				assert(!_ignoreLoadVideoMode);
 
-			// Ctrl-Alt-<number key> will change the GFX mode
-			if (isNormalNumber || isKeypadNumber) {
-				if (sdlKey - (isNormalNumber ? SDLK_1 : SDLK_KP1) <= 3) {
-#ifdef USE_OSD
-					int lastMode = _videoMode.mode;
-#endif
-					// We need to query the scale and set it up, because
-					// setGraphicsMode sets the default scale to 2
-					int oldScale = getScale();
-					beginGFXTransaction();
-						setGraphicsMode(sdlKey - (isNormalNumber ? SDLK_1 : SDLK_KP1));
-						setScale(oldScale);
-					endGFXTransaction();
 #ifdef USE_OSD
-					if (lastMode != _videoMode.mode)
-						displayModeChangedMsg();
+				const Common::String osdMsg = Common::String::format("Graphics mode: %s", _(modeDesc->description));
+				displayMessageOnOSD(osdMsg.c_str());
 #endif
-					internUpdateScreen();
-				}
-			}
-		}
 
-		if (event.kbd.hasFlags(Common::KBD_CTRL|Common::KBD_SHIFT)) {
-			// Ctrl-Shift-Return and Ctrl-Shift-Enter switch backwards between full screen modes
-			if (event.kbd.keycode == Common::KEYCODE_RETURN ||
-				event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER) {
-				toggleFullScreen(-1);
 				return true;
 			}
 		}
-		break;
-
-	case Common::EVENT_KEYUP:
-		return isHotkey(event);
+		// Fall through
 
 	default:
-		break;
+		return false;
 	}
-
-	return false;
-}
-
-void OpenGLSdlGraphicsManager::notifyVideoExpose() {
 }
 
-void OpenGLSdlGraphicsManager::notifyResize(const uint width, const uint height) {
-	// Do not resize if ignoring resize events.
-	if (!_ignoreResizeFrames && !getFullscreenMode()) {
-		bool scaleChanged = false;
-		beginGFXTransaction();
-			_videoMode.hardwareWidth = width;
-			_videoMode.hardwareHeight = height;
-
-			_screenResized = true;
-
-			int scale = MIN(_videoMode.hardwareWidth / _videoMode.screenWidth,
-			                _videoMode.hardwareHeight / _videoMode.screenHeight);
-
-			if (getScale() != scale) {
-				scaleChanged = true;
-				setScale(MAX(MIN(scale, 3), 1));
-			}
-
-			_transactionDetails.sizeChanged = true;
-		endGFXTransaction();
-#ifdef USE_OSD
-		if (scaleChanged)
-			displayScaleChangedMsg();
-#endif
+bool OpenGLSdlGraphicsManager::isHotkey(const Common::Event &event) {
+	if (event.kbd.hasFlags(Common::KBD_ALT)) {
+		return    event.kbd.keycode == Common::KEYCODE_RETURN
+		       || event.kbd.keycode == (Common::KeyCode)SDLK_KP_ENTER
+		       || event.kbd.keycode == Common::KEYCODE_s;
+	} else if (event.kbd.hasFlags(Common::KBD_CTRL | Common::KBD_ALT)) {
+		return    event.kbd.keycode == Common::KEYCODE_PLUS || event.kbd.keycode == Common::KEYCODE_MINUS
+		       || event.kbd.keycode == Common::KEYCODE_KP_PLUS || event.kbd.keycode == Common::KEYCODE_KP_MINUS
+		       || event.kbd.keycode == Common::KEYCODE_a
+		       || event.kbd.keycode == Common::KEYCODE_f;
 	}
-}
 
-void OpenGLSdlGraphicsManager::transformMouseCoordinates(Common::Point &point) {
-	adjustMousePosition(point.x, point.y);
-}
-
-void OpenGLSdlGraphicsManager::notifyMousePos(Common::Point mouse) {
-	setMousePosition(mouse.x, mouse.y);
+	return false;
 }
-
-#endif