Merging the gsoc2010-opengl branch

svn-id: r54518

18 files changed, 1047 insertions, 3590 deletions

diff --git a/backends/platform/sdl/amigaos/amigaos-main.cpp b/backends/platform/sdl/amigaos/amigaos-main.cpp
new file mode 100644
index 0000000000..db4598e879
--- /dev/null
+++ b/backends/platform/sdl/amigaos/amigaos-main.cpp
@@ -0,0 +1,54 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if defined(__amigaos4__)
+
+#include "backends/platform/sdl/amigaos/amigaos.h"
+#include "backends/plugins/sdl/sdl-provider.h"
+#include "base/main.h"
+
+int main(int argc, char *argv[]) {
+
+	// Create our OSystem instance
+	g_system = new OSystem_AmigaOS();
+	assert(g_system);
+
+	// Pre initialize the backend
+	((OSystem_AmigaOS *)g_system)->init();
+
+#ifdef DYNAMIC_MODULES
+	PluginManager::instance().addPluginProvider(new SDLPluginProvider());
+#endif
+
+	// Invoke the actual ScummVM main entry point:
+	int res = scummvm_main(argc, argv);
+
+	// Free OSystem
+	delete (OSystem_AmigaOS *)g_system;
+
+	return res;
+}
+
+#endif
diff --git a/backends/platform/sdl/amigaos/amigaos.cpp b/backends/platform/sdl/amigaos/amigaos.cpp
new file mode 100644
index 0000000000..d2924445a3
--- /dev/null
+++ b/backends/platform/sdl/amigaos/amigaos.cpp
@@ -0,0 +1,39 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef __amigaos4__
+
+#include "backends/platform/sdl/amigaos/amigaos.h"
+#include "backends/fs/amigaos4/amigaos4-fs-factory.h"
+
+void OSystem_AmigaOS::init() {
+	// Initialze File System Factory
+	_fsFactory = new AmigaOSFilesystemFactory();
+
+	// Invoke parent implementation of this method
+	OSystem_SDL::init();
+}
+
+#endif
diff --git a/backends/platform/sdl/amigaos/amigaos.h b/backends/platform/sdl/amigaos/amigaos.h
new file mode 100644
index 0000000000..92232ec98a
--- /dev/null
+++ b/backends/platform/sdl/amigaos/amigaos.h
@@ -0,0 +1,39 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef PLATFORM_SDL_AMIGAOS_H
+#define PLATFORM_SDL_AMIGAOS_H
+
+#include "backends/platform/sdl/sdl.h"
+
+class OSystem_AmigaOS : public OSystem_SDL {
+public:
+	OSystem_AmigaOS() {}
+	virtual ~OSystem_AmigaOS() {}
+
+	virtual void init();
+};
+
+#endif
diff --git a/backends/platform/sdl/events.cpp b/backends/platform/sdl/events.cpp
deleted file mode 100644
index 1c1d82730f..0000000000
--- a/backends/platform/sdl/events.cpp
+++ /dev/null
@@ -1,573 +0,0 @@
-/* ScummVM - Graphic Adventure Engine
- *
- * ScummVM is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program 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; 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.
- *
- * $URL$
- * $Id$
- *
- */
-
-#include "backends/platform/sdl/sdl.h"
-#include "common/util.h"
-#include "common/events.h"
-#include "graphics/scaler/aspect.h"	// for aspect2Real
-
-// FIXME move joystick defines out and replace with confile file options
-// we should really allow users to map any key to a joystick button
-#define JOY_DEADZONE 3200
-
-#ifndef __SYMBIAN32__ // Symbian wants dialog joystick i.e cursor for movement/selection
-	#define JOY_ANALOG
-#endif
-
-// #define JOY_INVERT_Y
-#define JOY_XAXIS 0
-#define JOY_YAXIS 1
-// buttons
-#define JOY_BUT_LMOUSE 0
-#define JOY_BUT_RMOUSE 2
-#define JOY_BUT_ESCAPE 3
-#define JOY_BUT_PERIOD 1
-#define JOY_BUT_SPACE 4
-#define JOY_BUT_F5 5
-
-
-
-
-static int mapKey(SDLKey key, SDLMod mod, Uint16 unicode) {
-	if (key >= SDLK_F1 && key <= SDLK_F9) {
-		return key - SDLK_F1 + Common::ASCII_F1;
-	} else if (key >= SDLK_KP0 && key <= SDLK_KP9) {
-		return key - SDLK_KP0 + '0';
-	} else if (key >= SDLK_UP && key <= SDLK_PAGEDOWN) {
-		return key;
-	} else if (unicode) {
-		return unicode;
-	} else if (key >= 'a' && key <= 'z' && (mod & KMOD_SHIFT)) {
-		return key & ~0x20;
-	} else if (key >= SDLK_NUMLOCK && key <= SDLK_EURO) {
-		return 0;
-	}
-	return key;
-}
-
-void OSystem_SDL::fillMouseEvent(Common::Event &event, int x, int y) {
-	event.mouse.x = x;
-	event.mouse.y = y;
-
-	// Update the "keyboard mouse" coords
-	_km.x = x;
-	_km.y = y;
-
-	// Adjust for the screen scaling
-	if (!_overlayVisible) {
-		event.mouse.x /= _videoMode.scaleFactor;
-		event.mouse.y /= _videoMode.scaleFactor;
-		if (_videoMode.aspectRatioCorrection)
-			event.mouse.y = aspect2Real(event.mouse.y);
-	}
-}
-
-void OSystem_SDL::handleKbdMouse() {
-	uint32 curTime = getMillis();
-	if (curTime >= _km.last_time + _km.delay_time) {
-		_km.last_time = curTime;
-		if (_km.x_down_count == 1) {
-			_km.x_down_time = curTime;
-			_km.x_down_count = 2;
-		}
-		if (_km.y_down_count == 1) {
-			_km.y_down_time = curTime;
-			_km.y_down_count = 2;
-		}
-
-		if (_km.x_vel || _km.y_vel) {
-			if (_km.x_down_count) {
-				if (curTime > _km.x_down_time + _km.delay_time * 12) {
-					if (_km.x_vel > 0)
-						_km.x_vel++;
-					else
-						_km.x_vel--;
-				} else if (curTime > _km.x_down_time + _km.delay_time * 8) {
-					if (_km.x_vel > 0)
-						_km.x_vel = 5;
-					else
-						_km.x_vel = -5;
-				}
-			}
-			if (_km.y_down_count) {
-				if (curTime > _km.y_down_time + _km.delay_time * 12) {
-					if (_km.y_vel > 0)
-						_km.y_vel++;
-					else
-						_km.y_vel--;
-				} else if (curTime > _km.y_down_time + _km.delay_time * 8) {
-					if (_km.y_vel > 0)
-						_km.y_vel = 5;
-					else
-						_km.y_vel = -5;
-				}
-			}
-
-			_km.x += _km.x_vel;
-			_km.y += _km.y_vel;
-
-			if (_km.x < 0) {
-				_km.x = 0;
-				_km.x_vel = -1;
-				_km.x_down_count = 1;
-			} else if (_km.x > _km.x_max) {
-				_km.x = _km.x_max;
-				_km.x_vel = 1;
-				_km.x_down_count = 1;
-			}
-
-			if (_km.y < 0) {
-				_km.y = 0;
-				_km.y_vel = -1;
-				_km.y_down_count = 1;
-			} else if (_km.y > _km.y_max) {
-				_km.y = _km.y_max;
-				_km.y_vel = 1;
-				_km.y_down_count = 1;
-			}
-
-			SDL_WarpMouse((Uint16)_km.x, (Uint16)_km.y);
-		}
-	}
-}
-
-static void SDLModToOSystemKeyFlags(SDLMod mod, Common::Event &event) {
-
-	event.kbd.flags = 0;
-
-#ifdef LINUPY
-	// Yopy has no ALT key, steal the SHIFT key
-	// (which isn't used much anyway)
-	if (mod & KMOD_SHIFT)
-		event.kbd.flags |= Common::KBD_ALT;
-#else
-	if (mod & KMOD_SHIFT)
-		event.kbd.flags |= Common::KBD_SHIFT;
-	if (mod & KMOD_ALT)
-		event.kbd.flags |= Common::KBD_ALT;
-#endif
-	if (mod & KMOD_CTRL)
-		event.kbd.flags |= Common::KBD_CTRL;
-
-	// Sticky flags
-	if (mod & KMOD_NUM)
-		event.kbd.flags |= Common::KBD_NUM;
-	if (mod & KMOD_CAPS)
-		event.kbd.flags |= Common::KBD_CAPS;
-}
-
-bool OSystem_SDL::pollEvent(Common::Event &event) {
-	SDL_Event ev;
-	ev.type = SDL_NOEVENT;
-
-	handleKbdMouse();
-
-	// If the screen mode changed, send an Common::EVENT_SCREEN_CHANGED
-	if (_modeChanged) {
-		_modeChanged = false;
-		event.type = Common::EVENT_SCREEN_CHANGED;
-		return true;
-	}
-
-	while (SDL_PollEvent(&ev)) {
-		preprocessEvents(&ev);
-		if (dispatchSDLEvent(ev, event))
-			return true;
-	}
-	return false;
-}
-
-bool OSystem_SDL::dispatchSDLEvent(SDL_Event &ev, Common::Event &event) {
-	switch (ev.type) {
-	case SDL_KEYDOWN:
-		return handleKeyDown(ev, event);
-	case SDL_KEYUP:
-		return handleKeyUp(ev, event);
-	case SDL_MOUSEMOTION:
-		return handleMouseMotion(ev, event);
-	case SDL_MOUSEBUTTONDOWN:
-		return handleMouseButtonDown(ev, event);
-	case SDL_MOUSEBUTTONUP:
-		return handleMouseButtonUp(ev, event);
-	case SDL_JOYBUTTONDOWN:
-		return handleJoyButtonDown(ev, event);
-	case SDL_JOYBUTTONUP:
-		return handleJoyButtonUp(ev, event);
-	case SDL_JOYAXISMOTION:
-		return handleJoyAxisMotion(ev, event);
-
-	case SDL_VIDEOEXPOSE:
-		_forceFull = true;
-		break;
-
-	case SDL_QUIT:
-		event.type = Common::EVENT_QUIT;
-		return true;
-
-	}
-
-	return false;
-}
-
-
-bool OSystem_SDL::handleKeyDown(SDL_Event &ev, Common::Event &event) {
-
-	SDLModToOSystemKeyFlags(SDL_GetModState(), event);
-
-	// Handle scroll lock as a key modifier
-	if (ev.key.keysym.sym == SDLK_SCROLLOCK)
-		_scrollLock = !_scrollLock;
-
-	if (_scrollLock)
-		event.kbd.flags |= Common::KBD_SCRL;
-
-	// Alt-Return and Alt-Enter toggle full screen mode
-	if (event.kbd.hasFlags(Common::KBD_ALT) && (ev.key.keysym.sym == SDLK_RETURN || ev.key.keysym.sym == SDLK_KP_ENTER)) {
-		beginGFXTransaction();
-			setFullscreenMode(!_videoMode.fullscreen);
-		endGFXTransaction();
-#ifdef USE_OSD
-		if (_videoMode.fullscreen)
-			displayMessageOnOSD("Fullscreen mode");
-		else
-			displayMessageOnOSD("Windowed mode");
-#endif
-
-		return false;
-	}
-
-	// Alt-S: Create a screenshot
-	if (event.kbd.hasFlags(Common::KBD_ALT) && ev.key.keysym.sym == 's') {
-		char filename[20];
-
-		for (int n = 0;; n++) {
-			SDL_RWops *file;
-
-			sprintf(filename, "scummvm%05d.bmp", n);
-			file = SDL_RWFromFile(filename, "r");
-			if (!file)
-				break;
-			SDL_RWclose(file);
-		}
-		if (saveScreenshot(filename))
-			printf("Saved '%s'\n", filename);
-		else
-			printf("Could not save screenshot!\n");
-		return false;
-	}
-
-	// Ctrl-m toggles mouse capture
-	if (event.kbd.hasFlags(Common::KBD_CTRL) && ev.key.keysym.sym == 'm') {
-		toggleMouseGrab();
-		return false;
-	}
-
-#if defined(MACOSX)
-	// On Macintosh', Cmd-Q quits
-	if ((ev.key.keysym.mod & KMOD_META) && ev.key.keysym.sym == 'q') {
-		event.type = Common::EVENT_QUIT;
-		return true;
-	}
-#elif defined(UNIX)
-	// On other unices, Control-Q quits
-	if ((ev.key.keysym.mod & KMOD_CTRL) && ev.key.keysym.sym == 'q') {
-		event.type = Common::EVENT_QUIT;
-		return true;
-	}
-#else
-	// Ctrl-z and Alt-X quit
-	if ((event.kbd.hasFlags(Common::KBD_CTRL) && ev.key.keysym.sym == 'z') || (event.kbd.hasFlags(Common::KBD_ALT) && ev.key.keysym.sym == 'x')) {
-		event.type = Common::EVENT_QUIT;
-		return true;
-	}
-#endif
-
-	if ((ev.key.keysym.mod & KMOD_CTRL) && ev.key.keysym.sym == 'u') {
-		event.type = Common::EVENT_MUTE;
-		return true;
-	}
-
-	// Ctrl-Alt-<key> will change the GFX mode
-	if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_ALT)) == (Common::KBD_CTRL|Common::KBD_ALT)) {
-		if (handleScalerHotkeys(ev.key))
-			return false;
-	}
-
-	if (remapKey(ev, event))
-		return true;
-
-	event.type = Common::EVENT_KEYDOWN;
-	event.kbd.keycode = (Common::KeyCode)ev.key.keysym.sym;
-	event.kbd.ascii = mapKey(ev.key.keysym.sym, ev.key.keysym.mod, ev.key.keysym.unicode);
-
-	return true;
-}
-
-bool OSystem_SDL::handleKeyUp(SDL_Event &ev, Common::Event &event) {
-	if (remapKey(ev, event))
-		return true;
-
-	event.type = Common::EVENT_KEYUP;
-	event.kbd.keycode = (Common::KeyCode)ev.key.keysym.sym;
-	event.kbd.ascii = mapKey(ev.key.keysym.sym, ev.key.keysym.mod, ev.key.keysym.unicode);
-
-	// Ctrl-Alt-<key> will change the GFX mode
-	SDLModToOSystemKeyFlags(SDL_GetModState(), event);
-
-	// Set the scroll lock sticky flag
-	if (_scrollLock)
-		event.kbd.flags |= Common::KBD_SCRL;
-
-	if (isScalerHotkey(event))
-		// Swallow these key up events
-		return false;
-
-	return true;
-}
-
-bool OSystem_SDL::handleMouseMotion(SDL_Event &ev, Common::Event &event) {
-	event.type = Common::EVENT_MOUSEMOVE;
-	fillMouseEvent(event, ev.motion.x, ev.motion.y);
-
-	setMousePos(event.mouse.x, event.mouse.y);
-	return true;
-}
-
-bool OSystem_SDL::handleMouseButtonDown(SDL_Event &ev, Common::Event &event) {
-	if (ev.button.button == SDL_BUTTON_LEFT)
-		event.type = Common::EVENT_LBUTTONDOWN;
-	else if (ev.button.button == SDL_BUTTON_RIGHT)
-		event.type = Common::EVENT_RBUTTONDOWN;
-#if defined(SDL_BUTTON_WHEELUP) && defined(SDL_BUTTON_WHEELDOWN)
-	else if (ev.button.button == SDL_BUTTON_WHEELUP)
-		event.type = Common::EVENT_WHEELUP;
-	else if (ev.button.button == SDL_BUTTON_WHEELDOWN)
-		event.type = Common::EVENT_WHEELDOWN;
-#endif
-#if defined(SDL_BUTTON_MIDDLE)
-	else if (ev.button.button == SDL_BUTTON_MIDDLE)
-		event.type = Common::EVENT_MBUTTONDOWN;
-#endif
-	else
-		return false;
-
-	fillMouseEvent(event, ev.button.x, ev.button.y);
-
-	return true;
-}
-
-bool OSystem_SDL::handleMouseButtonUp(SDL_Event &ev, Common::Event &event) {
-	if (ev.button.button == SDL_BUTTON_LEFT)
-		event.type = Common::EVENT_LBUTTONUP;
-	else if (ev.button.button == SDL_BUTTON_RIGHT)
-		event.type = Common::EVENT_RBUTTONUP;
-#if defined(SDL_BUTTON_MIDDLE)
-	else if (ev.button.button == SDL_BUTTON_MIDDLE)
-		event.type = Common::EVENT_MBUTTONUP;
-#endif
-	else
-		return false;
-	fillMouseEvent(event, ev.button.x, ev.button.y);
-
-	return true;
-}
-
-bool OSystem_SDL::handleJoyButtonDown(SDL_Event &ev, Common::Event &event) {
-	if (ev.jbutton.button == JOY_BUT_LMOUSE) {
-		event.type = Common::EVENT_LBUTTONDOWN;
-		fillMouseEvent(event, _km.x, _km.y);
-	} else if (ev.jbutton.button == JOY_BUT_RMOUSE) {
-		event.type = Common::EVENT_RBUTTONDOWN;
-		fillMouseEvent(event, _km.x, _km.y);
-	} else {
-		event.type = Common::EVENT_KEYDOWN;
-		switch (ev.jbutton.button) {
-		case JOY_BUT_ESCAPE:
-			event.kbd.keycode = Common::KEYCODE_ESCAPE;
-			event.kbd.ascii = mapKey(SDLK_ESCAPE, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_PERIOD:
-			event.kbd.keycode = Common::KEYCODE_PERIOD;
-			event.kbd.ascii = mapKey(SDLK_PERIOD, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_SPACE:
-			event.kbd.keycode = Common::KEYCODE_SPACE;
-			event.kbd.ascii = mapKey(SDLK_SPACE, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_F5:
-			event.kbd.keycode = Common::KEYCODE_F5;
-			event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-			break;
-		}
-	}
-	return true;
-}
-
-bool OSystem_SDL::handleJoyButtonUp(SDL_Event &ev, Common::Event &event) {
-	if (ev.jbutton.button == JOY_BUT_LMOUSE) {
-		event.type = Common::EVENT_LBUTTONUP;
-		fillMouseEvent(event, _km.x, _km.y);
-	} else if (ev.jbutton.button == JOY_BUT_RMOUSE) {
-		event.type = Common::EVENT_RBUTTONUP;
-		fillMouseEvent(event, _km.x, _km.y);
-	} else {
-		event.type = Common::EVENT_KEYUP;
-		switch (ev.jbutton.button) {
-		case JOY_BUT_ESCAPE:
-			event.kbd.keycode = Common::KEYCODE_ESCAPE;
-			event.kbd.ascii = mapKey(SDLK_ESCAPE, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_PERIOD:
-			event.kbd.keycode = Common::KEYCODE_PERIOD;
-			event.kbd.ascii = mapKey(SDLK_PERIOD, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_SPACE:
-			event.kbd.keycode = Common::KEYCODE_SPACE;
-			event.kbd.ascii = mapKey(SDLK_SPACE, ev.key.keysym.mod, 0);
-			break;
-		case JOY_BUT_F5:
-			event.kbd.keycode = Common::KEYCODE_F5;
-			event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-			break;
-		}
-	}
-	return true;
-}
-
-bool OSystem_SDL::handleJoyAxisMotion(SDL_Event &ev, Common::Event &event) {
-	int axis = ev.jaxis.value;
-	if ( axis > JOY_DEADZONE) {
-		axis -= JOY_DEADZONE;
-		event.type = Common::EVENT_MOUSEMOVE;
-	} else if ( axis < -JOY_DEADZONE ) {
-		axis += JOY_DEADZONE;
-		event.type = Common::EVENT_MOUSEMOVE;
-	} else
-		axis = 0;
-
-	if ( ev.jaxis.axis == JOY_XAXIS) {
-#ifdef JOY_ANALOG
-		_km.x_vel = axis/2000;
-		_km.x_down_count = 0;
-#else
-		if (axis != 0) {
-			_km.x_vel = (axis > 0) ? 1:-1;
-			_km.x_down_count = 1;
-		} else {
-			_km.x_vel = 0;
-			_km.x_down_count = 0;
-		}
-#endif
-
-	} else if (ev.jaxis.axis == JOY_YAXIS) {
-#ifndef JOY_INVERT_Y
-		axis = -axis;
-#endif
-#ifdef JOY_ANALOG
-		_km.y_vel = -axis / 2000;
-		_km.y_down_count = 0;
-#else
-		if (axis != 0) {
-			_km.y_vel = (-axis > 0) ? 1: -1;
-			_km.y_down_count = 1;
-		} else {
-			_km.y_vel = 0;
-			_km.y_down_count = 0;
-		}
-#endif
-	}
-
-	fillMouseEvent(event, _km.x, _km.y);
-
-	return true;
-}
-
-bool OSystem_SDL::remapKey(SDL_Event &ev, Common::Event &event) {
-#ifdef LINUPY
-	// On Yopy map the End button to quit
-	if ((ev.key.keysym.sym == 293)) {
-		event.type = Common::EVENT_QUIT;
-		return true;
-	}
-	// Map menu key to f5 (scumm menu)
-	if (ev.key.keysym.sym == 306) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_F5;
-		event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-		return true;
-	}
-	// Map action key to action
-	if (ev.key.keysym.sym == 291) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_TAB;
-		event.kbd.ascii = mapKey(SDLK_TAB, ev.key.keysym.mod, 0);
-		return true;
-	}
-	// Map OK key to skip cinematic
-	if (ev.key.keysym.sym == 292) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_ESCAPE;
-		event.kbd.ascii = mapKey(SDLK_ESCAPE, ev.key.keysym.mod, 0);
-		return true;
-	}
-#endif
-
-#ifdef QTOPIA
-	// Quit on fn+backspace on zaurus
-	if (ev.key.keysym.sym == 127) {
-		event.type = Common::EVENT_QUIT;
-		return true;
-	}
-
-	// Map menu key (f11) to f5 (scumm menu)
-	if (ev.key.keysym.sym == SDLK_F11) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_F5;
-		event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-	}
-	// Nap center (space) to tab (default action )
-	// I wanted to map the calendar button but the calendar comes up
-	//
-	else if (ev.key.keysym.sym == SDLK_SPACE) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_TAB;
-		event.kbd.ascii = mapKey(SDLK_TAB, ev.key.keysym.mod, 0);
-	}
-	// Since we stole space (pause) above we'll rebind it to the tab key on the keyboard
-	else if (ev.key.keysym.sym == SDLK_TAB) {
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = Common::KEYCODE_SPACE;
-		event.kbd.ascii = mapKey(SDLK_SPACE, ev.key.keysym.mod, 0);
-	} else {
-	// Let the events fall through if we didn't change them, this may not be the best way to
-	// set it up, but i'm not sure how sdl would like it if we let if fall through then redid it though.
-	// and yes i have an huge terminal size so i dont wrap soon enough.
-		event.type = Common::EVENT_KEYDOWN;
-		event.kbd.keycode = ev.key.keysym.sym;
-		event.kbd.ascii = mapKey(ev.key.keysym.sym, ev.key.keysym.mod, ev.key.keysym.unicode);
-	}
-#endif
-	return false;
-}
diff --git a/backends/platform/sdl/graphics.cpp b/backends/platform/sdl/graphics.cpp
deleted file mode 100644
index df63c3a7d6..0000000000
--- a/backends/platform/sdl/graphics.cpp
+++ /dev/null
@@ -1,1946 +0,0 @@
-/* ScummVM - Graphic Adventure Engine
- *
- * ScummVM is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program 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; 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.
- *
- * $URL$
- * $Id$
- *
- */
-
-#include "backends/platform/sdl/sdl.h"
-#include "common/mutex.h"
-#include "common/translation.h"
-#include "common/util.h"
-#ifdef USE_RGB_COLOR
-#include "common/list.h"
-#endif
-#include "graphics/font.h"
-#include "graphics/fontman.h"
-#include "graphics/scaler.h"
-#include "graphics/scaler/aspect.h"
-#include "graphics/surface.h"
-
-static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
-	{"1x", _s("Normal (no scaling)"), GFX_NORMAL},
-#ifdef USE_SCALERS
-	{"2x", "2x", GFX_DOUBLESIZE},
-	{"3x", "3x", GFX_TRIPLESIZE},
-	{"2xsai", "2xSAI", GFX_2XSAI},
-	{"super2xsai", "Super2xSAI", GFX_SUPER2XSAI},
-	{"supereagle", "SuperEagle", GFX_SUPEREAGLE},
-	{"advmame2x", "AdvMAME2x", GFX_ADVMAME2X},
-	{"advmame3x", "AdvMAME3x", GFX_ADVMAME3X},
-#ifdef USE_HQ_SCALERS
-	{"hq2x", "HQ2x", GFX_HQ2X},
-	{"hq3x", "HQ3x", GFX_HQ3X},
-#endif
-	{"tv2x", "TV2x", GFX_TV2X},
-	{"dotmatrix", "DotMatrix", GFX_DOTMATRIX},
-#endif
-	{0, 0, 0}
-};
-
-DECLARE_TRANSLATION_ADDITIONAL_CONTEXT("Normal (no scaling)", "lowres")
-
-// Table of relative scalers magnitudes
-// [definedScale - 1][scaleFactor - 1]
-static ScalerProc *scalersMagn[3][3] = {
-#ifdef USE_SCALERS
-	{ Normal1x, AdvMame2x, AdvMame3x },
-	{ Normal1x, Normal1x, Normal1o5x },
-	{ Normal1x, Normal1x, Normal1x }
-#else // remove dependencies on other scalers
-	{ Normal1x, Normal1x, Normal1x },
-	{ Normal1x, Normal1x, Normal1x },
-	{ Normal1x, Normal1x, Normal1x }
-#endif
-};
-
-static const int s_gfxModeSwitchTable[][4] = {
-		{ GFX_NORMAL, GFX_DOUBLESIZE, GFX_TRIPLESIZE, -1 },
-		{ GFX_NORMAL, GFX_ADVMAME2X, GFX_ADVMAME3X, -1 },
-		{ GFX_NORMAL, GFX_HQ2X, GFX_HQ3X, -1 },
-		{ GFX_NORMAL, GFX_2XSAI, -1, -1 },
-		{ GFX_NORMAL, GFX_SUPER2XSAI, -1, -1 },
-		{ GFX_NORMAL, GFX_SUPEREAGLE, -1, -1 },
-		{ GFX_NORMAL, GFX_TV2X, -1, -1 },
-		{ GFX_NORMAL, GFX_DOTMATRIX, -1, -1 }
-	};
-
-#ifdef USE_SCALERS
-static int cursorStretch200To240(uint8 *buf, uint32 pitch, int width, int height, int srcX, int srcY, int origSrcY);
-#endif
-
-const OSystem::GraphicsMode *OSystem_SDL::getSupportedGraphicsModes() const {
-	return s_supportedGraphicsModes;
-}
-
-int OSystem_SDL::getDefaultGraphicsMode() const {
-	return GFX_DOUBLESIZE;
-}
-
-void OSystem_SDL::beginGFXTransaction() {
-	assert(_transactionMode == kTransactionNone);
-
-	_transactionMode = kTransactionActive;
-
-	_transactionDetails.sizeChanged = false;
-
-	_transactionDetails.needHotswap = false;
-	_transactionDetails.needUpdatescreen = false;
-
-	_transactionDetails.normal1xScaler = false;
-#ifdef USE_RGB_COLOR
-	_transactionDetails.formatChanged = false;
-#endif
-
-	_oldVideoMode = _videoMode;
-}
-
-OSystem::TransactionError OSystem_SDL::endGFXTransaction() {
-	int errors = kTransactionSuccess;
-
-	assert(_transactionMode != kTransactionNone);
-
-	if (_transactionMode == kTransactionRollback) {
-		if (_videoMode.fullscreen != _oldVideoMode.fullscreen) {
-			errors |= kTransactionFullscreenFailed;
-
-			_videoMode.fullscreen = _oldVideoMode.fullscreen;
-		} else if (_videoMode.aspectRatioCorrection != _oldVideoMode.aspectRatioCorrection) {
-			errors |= kTransactionAspectRatioFailed;
-
-			_videoMode.aspectRatioCorrection = _oldVideoMode.aspectRatioCorrection;
-		} else if (_videoMode.mode != _oldVideoMode.mode) {
-			errors |= kTransactionModeSwitchFailed;
-
-			_videoMode.mode = _oldVideoMode.mode;
-			_videoMode.scaleFactor = _oldVideoMode.scaleFactor;
-#ifdef USE_RGB_COLOR
-		} else if (_videoMode.format != _oldVideoMode.format) {
-			errors |= kTransactionFormatNotSupported;
-
-			_videoMode.format = _oldVideoMode.format;
-			_screenFormat = _videoMode.format;
-#endif
-		} else if (_videoMode.screenWidth != _oldVideoMode.screenWidth || _videoMode.screenHeight != _oldVideoMode.screenHeight) {
-			errors |= kTransactionSizeChangeFailed;
-
-			_videoMode.screenWidth = _oldVideoMode.screenWidth;
-			_videoMode.screenHeight = _oldVideoMode.screenHeight;
-			_videoMode.overlayWidth = _oldVideoMode.overlayWidth;
-			_videoMode.overlayHeight = _oldVideoMode.overlayHeight;
-		}
-
-		if (_videoMode.fullscreen == _oldVideoMode.fullscreen &&
-			_videoMode.aspectRatioCorrection == _oldVideoMode.aspectRatioCorrection &&
-			_videoMode.mode == _oldVideoMode.mode &&
-			_videoMode.screenWidth == _oldVideoMode.screenWidth &&
-		   	_videoMode.screenHeight == _oldVideoMode.screenHeight) {
-
-			// Our new video mode would now be exactly the same as the
-			// old one. Since we still can not assume SDL_SetVideoMode
-			// to be working fine, we need to invalidate the old video
-			// mode, so loadGFXMode would error out properly.
-			_oldVideoMode.setup = false;
-		}
-	}
-
-#ifdef USE_RGB_COLOR
-	if (_transactionDetails.sizeChanged || _transactionDetails.formatChanged) {
-#else
-	if (_transactionDetails.sizeChanged) {
-#endif
-		unloadGFXMode();
-		if (!loadGFXMode()) {
-			if (_oldVideoMode.setup) {
-				_transactionMode = kTransactionRollback;
-				errors |= endGFXTransaction();
-			}
-		} else {
-			setGraphicsModeIntern();
-			clearOverlay();
-
-			_videoMode.setup = true;
-			_modeChanged = true;
-			// OSystem_SDL::pollEvent used to update the screen change count,
-			// but actually it gives problems when a video mode was changed
-			// but OSystem_SDL::pollEvent was not called. This for example
-			// caused a crash under certain circumstances when doing an RTL.
-			// To fix this issue we update the screen change count right here.
-			_screenChangeCount++;
-		}
-	} else if (_transactionDetails.needHotswap) {
-		setGraphicsModeIntern();
-		if (!hotswapGFXMode()) {
-			if (_oldVideoMode.setup) {
-				_transactionMode = kTransactionRollback;
-				errors |= endGFXTransaction();
-			}
-		} else {
-			_videoMode.setup = true;
-			_modeChanged = true;
-			// OSystem_SDL::pollEvent used to update the screen change count,
-			// but actually it gives problems when a video mode was changed
-			// but OSystem_SDL::pollEvent was not called. This for example
-			// caused a crash under certain circumstances when doing an RTL.
-			// To fix this issue we update the screen change count right here.
-			_screenChangeCount++;
-
-			if (_transactionDetails.needUpdatescreen)
-				internUpdateScreen();
-		}
-	} else if (_transactionDetails.needUpdatescreen) {
-		setGraphicsModeIntern();
-		internUpdateScreen();
-	}
-
-	_transactionMode = kTransactionNone;
-	return (TransactionError)errors;
-}
-
-#ifdef USE_RGB_COLOR
-
-Common::List<Graphics::PixelFormat> OSystem_SDL::getSupportedFormats() const {
-	assert(!_supportedFormats.empty());
-	return _supportedFormats;
-}
-
-void OSystem_SDL::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[] = {
-#ifdef USE_RGB_COLOR
-		// RGBA8888, ARGB8888, RGB888
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0),
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24),
-		Graphics::PixelFormat(3, 8, 8, 8, 0, 16, 8, 0, 0),
-#endif
-		// RGB565, XRGB1555, RGB555, RGBA4444, ARGB4444
-		Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0),
-		Graphics::PixelFormat(2, 5, 5, 5, 1, 10, 5, 0, 15),
-		Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0),
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 12, 8, 4, 0),
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 8, 4, 0, 12)
-	};
-	const Graphics::PixelFormat BGRList[] = {
-#ifdef USE_RGB_COLOR
-		// ABGR8888, BGRA8888, BGR888
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24),
-		Graphics::PixelFormat(4, 8, 8, 8, 8, 8, 16, 24, 0),
-		Graphics::PixelFormat(3, 8, 8, 8, 0, 0, 8, 16, 0),
-#endif
-		// BGR565, XBGR1555, BGR555, ABGR4444, BGRA4444
-		Graphics::PixelFormat(2, 5, 6, 5, 0, 0, 5, 11, 0),
-		Graphics::PixelFormat(2, 5, 5, 5, 1, 0, 5, 10, 15),
-		Graphics::PixelFormat(2, 5, 5, 5, 0, 0, 5, 10, 0),
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 0, 4, 8, 12),
-		Graphics::PixelFormat(2, 4, 4, 4, 4, 4, 8, 12, 0)
-	};
-
-	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 MacOSX SDL not providing an accurate Aloss value.
-		if (_hwscreen->format->Amask == 0)
-			format.aLoss = 8;
-
-		// Push it first, as the prefered format.
-		_supportedFormats.push_back(format);
-	}
-
-	// TODO: prioritize matching alpha masks
-	int i;
-
-	// Push some RGB formats
-	for (i = 0; i < ARRAYSIZE(RGBList); i++) {
-		if (_hwscreen && (RGBList[i].bytesPerPixel > format.bytesPerPixel))
-			continue;
-		if (RGBList[i] != format)
-			_supportedFormats.push_back(RGBList[i]);
-	}
-
-	// Push some BGR formats
-	for (i = 0; i < ARRAYSIZE(BGRList); i++) {
-		if (_hwscreen && (BGRList[i].bytesPerPixel > format.bytesPerPixel))
-			continue;
-		if (BGRList[i] != format)
-			_supportedFormats.push_back(BGRList[i]);
-	}
-
-	// Finally, we always supposed 8 bit palette graphics
-	_supportedFormats.push_back(Graphics::PixelFormat::createFormatCLUT8());
-}
-
-#endif
-
-bool OSystem_SDL::setGraphicsMode(int mode) {
-	Common::StackLock lock(_graphicsMutex);
-
-	assert(_transactionMode == kTransactionActive);
-
-	if (_oldVideoMode.setup && _oldVideoMode.mode == mode)
-		return true;
-
-	int newScaleFactor = 1;
-
-	switch (mode) {
-	case GFX_NORMAL:
-		newScaleFactor = 1;
-		break;
-#ifdef USE_SCALERS
-	case GFX_DOUBLESIZE:
-		newScaleFactor = 2;
-		break;
-	case GFX_TRIPLESIZE:
-		newScaleFactor = 3;
-		break;
-
-	case GFX_2XSAI:
-		newScaleFactor = 2;
-		break;
-	case GFX_SUPER2XSAI:
-		newScaleFactor = 2;
-		break;
-	case GFX_SUPEREAGLE:
-		newScaleFactor = 2;
-		break;
-	case GFX_ADVMAME2X:
-		newScaleFactor = 2;
-		break;
-	case GFX_ADVMAME3X:
-		newScaleFactor = 3;
-		break;
-#ifdef USE_HQ_SCALERS
-	case GFX_HQ2X:
-		newScaleFactor = 2;
-		break;
-	case GFX_HQ3X:
-		newScaleFactor = 3;
-		break;
-#endif
-	case GFX_TV2X:
-		newScaleFactor = 2;
-		break;
-	case GFX_DOTMATRIX:
-		newScaleFactor = 2;
-		break;
-#endif // USE_SCALERS
-
-	default:
-		warning("unknown gfx mode %d", mode);
-		return false;
-	}
-
-	_transactionDetails.normal1xScaler = (mode == GFX_NORMAL);
-	if (_oldVideoMode.setup && _oldVideoMode.scaleFactor != newScaleFactor)
-		_transactionDetails.needHotswap = true;
-
-	_transactionDetails.needUpdatescreen = true;
-
-	_videoMode.mode = mode;
-	_videoMode.scaleFactor = newScaleFactor;
-
-	return true;
-}
-
-void OSystem_SDL::setGraphicsModeIntern() {
-	Common::StackLock lock(_graphicsMutex);
-	ScalerProc *newScalerProc = 0;
-
-	switch (_videoMode.mode) {
-	case GFX_NORMAL:
-		newScalerProc = Normal1x;
-		break;
-#ifdef USE_SCALERS
-	case GFX_DOUBLESIZE:
-		newScalerProc = Normal2x;
-		break;
-	case GFX_TRIPLESIZE:
-		newScalerProc = Normal3x;
-		break;
-
-	case GFX_2XSAI:
-		newScalerProc = _2xSaI;
-		break;
-	case GFX_SUPER2XSAI:
-		newScalerProc = Super2xSaI;
-		break;
-	case GFX_SUPEREAGLE:
-		newScalerProc = SuperEagle;
-		break;
-	case GFX_ADVMAME2X:
-		newScalerProc = AdvMame2x;
-		break;
-	case GFX_ADVMAME3X:
-		newScalerProc = AdvMame3x;
-		break;
-#ifdef USE_HQ_SCALERS
-	case GFX_HQ2X:
-		newScalerProc = HQ2x;
-		break;
-	case GFX_HQ3X:
-		newScalerProc = HQ3x;
-		break;
-#endif
-	case GFX_TV2X:
-		newScalerProc = TV2x;
-		break;
-	case GFX_DOTMATRIX:
-		newScalerProc = DotMatrix;
-		break;
-#endif // USE_SCALERS
-
-	default:
-		error("Unknown gfx mode %d", _videoMode.mode);
-	}
-
-	_scalerProc = newScalerProc;
-
-	if (_videoMode.mode != GFX_NORMAL) {
-		for (int i = 0; i < ARRAYSIZE(s_gfxModeSwitchTable); i++) {
-			if (s_gfxModeSwitchTable[i][1] == _videoMode.mode || s_gfxModeSwitchTable[i][2] == _videoMode.mode) {
-				_scalerType = i;
-				break;
-			}
-		}
-	}
-
-	if (!_screen || !_hwscreen)
-		return;
-
-	// Blit everything to the screen
-	_forceFull = true;
-
-	// Even if the old and new scale factors are the same, we may have a
-	// different scaler for the cursor now.
-	blitCursor();
-}
-
-int OSystem_SDL::getGraphicsMode() const {
-	assert (_transactionMode == kTransactionNone);
-	return _videoMode.mode;
-}
-
-void OSystem_SDL::initSize(uint w, uint h, const Graphics::PixelFormat *format) {
-	assert(_transactionMode == kTransactionActive);
-
-#ifdef USE_RGB_COLOR
-	//avoid redundant format changes
-	Graphics::PixelFormat newFormat;
-	if (!format)
-		newFormat = Graphics::PixelFormat::createFormatCLUT8();
-	else
-		newFormat = *format;
-
-	assert(newFormat.bytesPerPixel > 0);
-
-	if (newFormat != _videoMode.format) {
-		_videoMode.format = newFormat;
-		_transactionDetails.formatChanged = true;
-		_screenFormat = newFormat;
-	}
-#endif
-
-	// Avoid redundant res changes
-	if ((int)w == _videoMode.screenWidth && (int)h == _videoMode.screenHeight)
-		return;
-
-	_videoMode.screenWidth = w;
-	_videoMode.screenHeight = h;
-
-	_transactionDetails.sizeChanged = true;
-}
-
-int OSystem_SDL::effectiveScreenHeight() const {
-	return _videoMode.scaleFactor *
-				(_videoMode.aspectRatioCorrection
-					? real2Aspect(_videoMode.screenHeight)
-					: _videoMode.screenHeight);
-}
-
-static void fixupResolutionForAspectRatio(AspectRatio desiredAspectRatio, int &width, int &height) {
-	assert(&width != &height);
-
-	if (desiredAspectRatio.isAuto())
-		return;
-
-	int kw = desiredAspectRatio.kw();
-	int kh = desiredAspectRatio.kh();
-
-	const int w = width;
-	const int h = height;
-
-	SDL_Rect const* const*availableModes = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_SWSURFACE); //TODO : Maybe specify a pixel format
-	assert(availableModes);
-
-	const SDL_Rect *bestMode = NULL;
-	uint bestMetric = (uint)-1; // Metric is wasted space
-	while (const SDL_Rect *mode = *availableModes++) {
-		if (mode->w < w)
-			continue;
-		if (mode->h < h)
-			continue;
-		if (mode->h * kw != mode->w * kh)
-			continue;
-		//printf("%d %d\n", mode->w, mode->h);
-
-		uint metric = mode->w * mode->h - w * h;
-		if (metric > bestMetric)
-			continue;
-
-		bestMetric = metric;
-		bestMode = mode;
-	}
-
-	if (!bestMode) {
-		warning("Unable to enforce the desired aspect ratio");
-		return;
-	}
-	//printf("%d %d\n", bestMode->w, bestMode->h);
-	width = bestMode->w;
-	height = bestMode->h;
-}
-
-bool OSystem_SDL::loadGFXMode() {
-	assert(_inited);
-	_forceFull = true;
-
-#if !defined(__MAEMO__) && !defined(DINGUX) && !defined(GPH_DEVICE) && !defined(LINUXMOTO) && !defined(OPENPANDORA)
-	_videoMode.overlayWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
-	_videoMode.overlayHeight = _videoMode.screenHeight * _videoMode.scaleFactor;
-
-	if (_videoMode.screenHeight != 200 && _videoMode.screenHeight != 400)
-		_videoMode.aspectRatioCorrection = false;
-
-	if (_videoMode.aspectRatioCorrection)
-		_videoMode.overlayHeight = real2Aspect(_videoMode.overlayHeight);
-
-	_videoMode.hardwareWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
-	_videoMode.hardwareHeight = effectiveScreenHeight();
-#else
-	_videoMode.hardwareWidth = _videoMode.overlayWidth;
-	_videoMode.hardwareHeight = _videoMode.overlayHeight;
-#endif
-
-	//
-	// Create the surface that contains the 8 bit game data
-	//
-#ifdef USE_RGB_COLOR
-	_screen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth, _videoMode.screenHeight,
-						_screenFormat.bytesPerPixel << 3,
-						((1 << _screenFormat.rBits()) - 1) << _screenFormat.rShift ,
-						((1 << _screenFormat.gBits()) - 1) << _screenFormat.gShift ,
-						((1 << _screenFormat.bBits()) - 1) << _screenFormat.bShift ,
-						((1 << _screenFormat.aBits()) - 1) << _screenFormat.aShift );
-	if (_screen == NULL)
-		error("allocating _screen failed");
-
-#else
-	_screen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth, _videoMode.screenHeight, 8, 0, 0, 0, 0);
-	if (_screen == NULL)
-		error("allocating _screen failed");
-#endif
-
-	//
-	// Create the surface that contains the scaled graphics in 16 bit mode
-	//
-
-	if (_videoMode.fullscreen) {
-		fixupResolutionForAspectRatio(_videoMode.desiredAspectRatio, _videoMode.hardwareWidth, _videoMode.hardwareHeight);
-	}
-
-	_hwscreen = SDL_SetVideoMode(_videoMode.hardwareWidth, _videoMode.hardwareHeight, 16,
-		_videoMode.fullscreen ? (SDL_FULLSCREEN|SDL_SWSURFACE) : SDL_SWSURFACE
-	);
-#ifdef USE_RGB_COLOR
-	detectSupportedFormats();
-#endif
-
-	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.
-
-		if (!_oldVideoMode.setup) {
-			warning("SDL_SetVideoMode says we can't switch to that mode (%s)", SDL_GetError());
-			quit();
-		} else {
-			return false;
-		}
-	}
-
-	//
-	// Create the surface used for the graphics in 16 bit before scaling, and also the overlay
-	//
-
-	// Need some extra bytes around when using 2xSaI
-	_tmpscreen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth + 3, _videoMode.screenHeight + 3,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-
-	if (_tmpscreen == NULL)
-		error("allocating _tmpscreen failed");
-
-	_overlayscreen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.overlayWidth, _videoMode.overlayHeight,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-
-	if (_overlayscreen == NULL)
-		error("allocating _overlayscreen failed");
-
-	_overlayFormat.bytesPerPixel = _overlayscreen->format->BytesPerPixel;
-
-	_overlayFormat.rLoss = _overlayscreen->format->Rloss;
-	_overlayFormat.gLoss = _overlayscreen->format->Gloss;
-	_overlayFormat.bLoss = _overlayscreen->format->Bloss;
-	_overlayFormat.aLoss = _overlayscreen->format->Aloss;
-
-	_overlayFormat.rShift = _overlayscreen->format->Rshift;
-	_overlayFormat.gShift = _overlayscreen->format->Gshift;
-	_overlayFormat.bShift = _overlayscreen->format->Bshift;
-	_overlayFormat.aShift = _overlayscreen->format->Ashift;
-
-	_tmpscreen2 = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.overlayWidth + 3, _videoMode.overlayHeight + 3,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-
-	if (_tmpscreen2 == NULL)
-		error("allocating _tmpscreen2 failed");
-
-#ifdef USE_OSD
-	_osdSurface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA,
-						_hwscreen->w,
-						_hwscreen->h,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-	if (_osdSurface == NULL)
-		error("allocating _osdSurface failed");
-	SDL_SetColorKey(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, kOSDColorKey);
-#endif
-
-	// keyboard cursor control, some other better place for it?
-	_km.x_max = _videoMode.screenWidth * _videoMode.scaleFactor - 1;
-	_km.y_max = effectiveScreenHeight() - 1;
-	_km.delay_time = 25;
-	_km.last_time = 0;
-
-	// Distinguish 555 and 565 mode
-	if (_hwscreen->format->Rmask == 0x7C00)
-		InitScalers(555);
-	else
-		InitScalers(565);
-
-	return true;
-}
-
-void OSystem_SDL::unloadGFXMode() {
-	if (_screen) {
-		SDL_FreeSurface(_screen);
-		_screen = NULL;
-	}
-
-	if (_hwscreen) {
-		SDL_FreeSurface(_hwscreen);
-		_hwscreen = NULL;
-	}
-
-	if (_tmpscreen) {
-		SDL_FreeSurface(_tmpscreen);
-		_tmpscreen = NULL;
-	}
-
-	if (_tmpscreen2) {
-		SDL_FreeSurface(_tmpscreen2);
-		_tmpscreen2 = NULL;
-	}
-
-	if (_overlayscreen) {
-		SDL_FreeSurface(_overlayscreen);
-		_overlayscreen = NULL;
-	}
-
-#ifdef USE_OSD
-	if (_osdSurface) {
-		SDL_FreeSurface(_osdSurface);
-		_osdSurface = NULL;
-	}
-#endif
-	DestroyScalers();
-}
-
-bool OSystem_SDL::hotswapGFXMode() {
-	if (!_screen)
-		return false;
-
-	// Keep around the old _screen & _overlayscreen so we can restore the screen data
-	// after the mode switch.
-	SDL_Surface *old_screen = _screen;
-	_screen = NULL;
-	SDL_Surface *old_overlayscreen = _overlayscreen;
-	_overlayscreen = NULL;
-
-	// Release the HW screen surface
-	SDL_FreeSurface(_hwscreen); _hwscreen = NULL;
-
-	SDL_FreeSurface(_tmpscreen); _tmpscreen = NULL;
-	SDL_FreeSurface(_tmpscreen2); _tmpscreen2 = NULL;
-
-#ifdef USE_OSD
-	// Release the OSD surface
-	SDL_FreeSurface(_osdSurface); _osdSurface = NULL;
-#endif
-
-	// Setup the new GFX mode
-	if (!loadGFXMode()) {
-		unloadGFXMode();
-
-		_screen = old_screen;
-		_overlayscreen = old_overlayscreen;
-
-		return false;
-	}
-
-	// reset palette
-	SDL_SetColors(_screen, _currentPalette, 0, 256);
-
-	// Restore old screen content
-	SDL_BlitSurface(old_screen, NULL, _screen, NULL);
-	SDL_BlitSurface(old_overlayscreen, NULL, _overlayscreen, NULL);
-
-	// Free the old surfaces
-	SDL_FreeSurface(old_screen);
-	SDL_FreeSurface(old_overlayscreen);
-
-	// Update cursor to new scale
-	blitCursor();
-
-	// Blit everything to the screen
-	internUpdateScreen();
-
-	return true;
-}
-
-void OSystem_SDL::updateScreen() {
-	assert (_transactionMode == kTransactionNone);
-
-	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
-
-	internUpdateScreen();
-}
-
-void OSystem_SDL::internUpdateScreen() {
-	SDL_Surface *srcSurf, *origSurf;
-	int height, width;
-	ScalerProc *scalerProc;
-	int scale1;
-
-#if defined (DEBUG) && ! defined(_WIN32_WCE) // definitions not available for non-DEBUG here. (needed this to compile in SYMBIAN32 & linux?)
-	assert(_hwscreen != NULL);
-	assert(_hwscreen->map->sw_data != NULL);
-#endif
-
-	// If the shake position changed, fill the dirty area with blackness
-	if (_currentShakePos != _newShakePos ||
-		(_mouseNeedsRedraw && _mouseBackup.y <= _currentShakePos)) {
-		SDL_Rect blackrect = {0, 0, _videoMode.screenWidth * _videoMode.scaleFactor, _newShakePos * _videoMode.scaleFactor};
-
-		if (_videoMode.aspectRatioCorrection && !_overlayVisible)
-			blackrect.h = real2Aspect(blackrect.h - 1) + 1;
-
-		SDL_FillRect(_hwscreen, &blackrect, 0);
-
-		_currentShakePos = _newShakePos;
-
-		_forceFull = true;
-	}
-
-	// Check whether the palette was changed in the meantime and update the
-	// screen surface accordingly.
-	if (_screen && _paletteDirtyEnd != 0) {
-		SDL_SetColors(_screen, _currentPalette + _paletteDirtyStart,
-			_paletteDirtyStart,
-			_paletteDirtyEnd - _paletteDirtyStart);
-
-		_paletteDirtyEnd = 0;
-
-		_forceFull = true;
-	}
-
-#ifdef USE_OSD
-	// OSD visible (i.e. non-transparent)?
-	if (_osdAlpha != SDL_ALPHA_TRANSPARENT) {
-		// Updated alpha value
-		const int diff = SDL_GetTicks() - _osdFadeStartTime;
-		if (diff > 0) {
-			if (diff >= kOSDFadeOutDuration) {
-				// Back to full transparency
-				_osdAlpha = SDL_ALPHA_TRANSPARENT;
-			} else {
-				// Do a linear fade out...
-				const int startAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
-				_osdAlpha = startAlpha + diff * (SDL_ALPHA_TRANSPARENT - startAlpha) / kOSDFadeOutDuration;
-			}
-			SDL_SetAlpha(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdAlpha);
-			_forceFull = true;
-		}
-	}
-#endif
-
-	if (!_overlayVisible) {
-		origSurf = _screen;
-		srcSurf = _tmpscreen;
-		width = _videoMode.screenWidth;
-		height = _videoMode.screenHeight;
-		scalerProc = _scalerProc;
-		scale1 = _videoMode.scaleFactor;
-	} else {
-		origSurf = _overlayscreen;
-		srcSurf = _tmpscreen2;
-		width = _videoMode.overlayWidth;
-		height = _videoMode.overlayHeight;
-		scalerProc = Normal1x;
-
-		scale1 = 1;
-	}
-
-	// Add the area covered by the mouse cursor to the list of dirty rects if
-	// we have to redraw the mouse.
-	if (_mouseNeedsRedraw)
-		undrawMouse();
-
-	// Force a full redraw if requested
-	if (_forceFull) {
-		_numDirtyRects = 1;
-		_dirtyRectList[0].x = 0;
-		_dirtyRectList[0].y = 0;
-		_dirtyRectList[0].w = width;
-		_dirtyRectList[0].h = height;
-	}
-
-	// Only draw anything if necessary
-	if (_numDirtyRects > 0 || _mouseNeedsRedraw) {
-		SDL_Rect *r;
-		SDL_Rect dst;
-		uint32 srcPitch, dstPitch;
-		SDL_Rect *lastRect = _dirtyRectList + _numDirtyRects;
-
-		for (r = _dirtyRectList; r != lastRect; ++r) {
-			dst = *r;
-			dst.x++;	// Shift rect by one since 2xSai needs to access the data around
-			dst.y++;	// any pixel to scale it, and we want to avoid mem access crashes.
-
-			if (SDL_BlitSurface(origSurf, r, srcSurf, &dst) != 0)
-				error("SDL_BlitSurface failed: %s", SDL_GetError());
-		}
-
-		SDL_LockSurface(srcSurf);
-		SDL_LockSurface(_hwscreen);
-
-		srcPitch = srcSurf->pitch;
-		dstPitch = _hwscreen->pitch;
-
-		for (r = _dirtyRectList; r != lastRect; ++r) {
-			register int dst_y = r->y + _currentShakePos;
-			register int dst_h = 0;
-			register int orig_dst_y = 0;
-			register int rx1 = r->x * scale1;
-
-			if (dst_y < height) {
-				dst_h = r->h;
-				if (dst_h > height - dst_y)
-					dst_h = height - dst_y;
-
-				orig_dst_y = dst_y;
-				dst_y = dst_y * scale1;
-
-				if (_videoMode.aspectRatioCorrection && !_overlayVisible)
-					dst_y = real2Aspect(dst_y);
-
-				assert(scalerProc != NULL);
-				scalerProc((byte *)srcSurf->pixels + (r->x * 2 + 2) + (r->y + 1) * srcPitch, srcPitch,
-						   (byte *)_hwscreen->pixels + rx1 * 2 + dst_y * dstPitch, dstPitch, r->w, dst_h);
-			}
-
-			r->x = rx1;
-			r->y = dst_y;
-			r->w = r->w * scale1;
-			r->h = dst_h * scale1;
-
-#ifdef USE_SCALERS
-			if (_videoMode.aspectRatioCorrection && orig_dst_y < height && !_overlayVisible)
-				r->h = stretch200To240((uint8 *) _hwscreen->pixels, dstPitch, r->w, r->h, r->x, r->y, orig_dst_y * scale1);
-#endif
-		}
-		SDL_UnlockSurface(srcSurf);
-		SDL_UnlockSurface(_hwscreen);
-
-		// Readjust the dirty rect list in case we are doing a full update.
-		// This is necessary if shaking is active.
-		if (_forceFull) {
-			_dirtyRectList[0].y = 0;
-			_dirtyRectList[0].h = effectiveScreenHeight();
-		}
-
-		drawMouse();
-
-#ifdef USE_OSD
-		if (_osdAlpha != SDL_ALPHA_TRANSPARENT) {
-			SDL_BlitSurface(_osdSurface, 0, _hwscreen, 0);
-		}
-#endif
-		// Finally, blit all our changes to the screen
-		SDL_UpdateRects(_hwscreen, _numDirtyRects, _dirtyRectList);
-	}
-
-	_numDirtyRects = 0;
-	_forceFull = false;
-	_mouseNeedsRedraw = false;
-}
-
-bool OSystem_SDL::saveScreenshot(const char *filename) {
-	assert(_hwscreen != NULL);
-
-	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
-	return SDL_SaveBMP(_hwscreen, filename) == 0;
-}
-
-void OSystem_SDL::setFullscreenMode(bool enable) {
-	Common::StackLock lock(_graphicsMutex);
-
-	if (_oldVideoMode.setup && _oldVideoMode.fullscreen == enable)
-		return;
-
-	if (_transactionMode == kTransactionActive) {
-		_videoMode.fullscreen = enable;
-		_transactionDetails.needHotswap = true;
-	}
-}
-
-void OSystem_SDL::setAspectRatioCorrection(bool enable) {
-	Common::StackLock lock(_graphicsMutex);
-
-	if (_oldVideoMode.setup && _oldVideoMode.aspectRatioCorrection == enable)
-		return;
-
-	if (_transactionMode == kTransactionActive) {
-		_videoMode.aspectRatioCorrection = enable;
-		_transactionDetails.needHotswap = true;
-	}
-}
-
-void OSystem_SDL::copyRectToScreen(const byte *src, int pitch, int x, int y, int w, int h) {
-	assert (_transactionMode == kTransactionNone);
-	assert(src);
-
-	if (_screen == NULL) {
-		warning("OSystem_SDL::copyRectToScreen: _screen == NULL");
-		return;
-	}
-
-	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
-
-	assert(x >= 0 && x < _videoMode.screenWidth);
-	assert(y >= 0 && y < _videoMode.screenHeight);
-	assert(h > 0 && y + h <= _videoMode.screenHeight);
-	assert(w > 0 && x + w <= _videoMode.screenWidth);
-
-	addDirtyRect(x, y, w, h);
-
-	// Try to lock the screen surface
-	if (SDL_LockSurface(_screen) == -1)
-		error("SDL_LockSurface failed: %s", SDL_GetError());
-
-#ifdef USE_RGB_COLOR
-	byte *dst = (byte *)_screen->pixels + y * _videoMode.screenWidth * _screenFormat.bytesPerPixel + x * _screenFormat.bytesPerPixel;
-	if (_videoMode.screenWidth == w && pitch == w * _screenFormat.bytesPerPixel) {
-		memcpy(dst, src, h*w*_screenFormat.bytesPerPixel);
-	} else {
-		do {
-			memcpy(dst, src, w * _screenFormat.bytesPerPixel);
-			src += pitch;
-			dst += _videoMode.screenWidth * _screenFormat.bytesPerPixel;
-		} while (--h);
-	}
-#else
-	byte *dst = (byte *)_screen->pixels + y * _videoMode.screenWidth + x;
-	if (_videoMode.screenWidth == pitch && pitch == w) {
-		memcpy(dst, src, h*w);
-	} else {
-		do {
-			memcpy(dst, src, w);
-			src += pitch;
-			dst += _videoMode.screenWidth;
-		} while (--h);
-	}
-#endif
-
-	// Unlock the screen surface
-	SDL_UnlockSurface(_screen);
-}
-
-Graphics::Surface *OSystem_SDL::lockScreen() {
-	assert (_transactionMode == kTransactionNone);
-
-	// Lock the graphics mutex
-	lockMutex(_graphicsMutex);
-
-	// paranoia check
-	assert(!_screenIsLocked);
-	_screenIsLocked = true;
-
-	// Try to lock the screen surface
-	if (SDL_LockSurface(_screen) == -1)
-		error("SDL_LockSurface failed: %s", SDL_GetError());
-
-	_framebuffer.pixels = _screen->pixels;
-	_framebuffer.w = _screen->w;
-	_framebuffer.h = _screen->h;
-	_framebuffer.pitch = _screen->pitch;
-#ifdef USE_RGB_COLOR
-	_framebuffer.bytesPerPixel = _screenFormat.bytesPerPixel;
-#else
-	_framebuffer.bytesPerPixel = 1;
-#endif
-
-	return &_framebuffer;
-}
-
-void OSystem_SDL::unlockScreen() {
-	assert (_transactionMode == kTransactionNone);
-
-	// paranoia check
-	assert(_screenIsLocked);
-	_screenIsLocked = false;
-
-	// Unlock the screen surface
-	SDL_UnlockSurface(_screen);
-
-	// Trigger a full screen update
-	_forceFull = true;
-
-	// Finally unlock the graphics mutex
-	unlockMutex(_graphicsMutex);
-}
-
-void OSystem_SDL::addDirtyRect(int x, int y, int w, int h, bool realCoordinates) {
-	if (_forceFull)
-		return;
-
-	if (_numDirtyRects == NUM_DIRTY_RECT) {
-		_forceFull = true;
-		return;
-	}
-
-	int height, width;
-
-	if (!_overlayVisible && !realCoordinates) {
-		width = _videoMode.screenWidth;
-		height = _videoMode.screenHeight;
-	} else {
-		width = _videoMode.overlayWidth;
-		height = _videoMode.overlayHeight;
-	}
-
-	// Extend the dirty region by 1 pixel for scalers
-	// that "smear" the screen, e.g. 2xSAI
-	if (!realCoordinates) {
-		x--;
-		y--;
-		w+=2;
-		h+=2;
-	}
-
-	// clip
-	if (x < 0) {
-		w += x;
-		x = 0;
-	}
-
-	if (y < 0) {
-		h += y;
-		y=0;
-	}
-
-	if (w > width - x) {
-		w = width - x;
-	}
-
-	if (h > height - y) {
-		h = height - y;
-	}
-
-#ifdef USE_SCALERS
-	if (_videoMode.aspectRatioCorrection && !_overlayVisible && !realCoordinates) {
-		makeRectStretchable(x, y, w, h);
-	}
-#endif
-
-	if (w == width && h == height) {
-		_forceFull = true;
-		return;
-	}
-
-	if (w > 0 && h > 0) {
-		SDL_Rect *r = &_dirtyRectList[_numDirtyRects++];
-
-		r->x = x;
-		r->y = y;
-		r->w = w;
-		r->h = h;
-	}
-}
-
-int16 OSystem_SDL::getHeight() {
-	return _videoMode.screenHeight;
-}
-
-int16 OSystem_SDL::getWidth() {
-	return _videoMode.screenWidth;
-}
-
-void OSystem_SDL::setPalette(const byte *colors, uint start, uint num) {
-	assert(colors);
-
-#ifdef USE_RGB_COLOR
-	assert(_screenFormat.bytesPerPixel == 1);
-#endif
-
-	// Setting the palette before _screen is created is allowed - for now -
-	// since we don't actually set the palette until the screen is updated.
-	// But it could indicate a programming error, so let's warn about it.
-
-	if (!_screen)
-		warning("OSystem_SDL::setPalette: _screen == NULL");
-
-	const byte *b = colors;
-	uint i;
-	SDL_Color *base = _currentPalette + start;
-	for (i = 0; i < num; i++) {
-		base[i].r = b[0];
-		base[i].g = b[1];
-		base[i].b = b[2];
-		b += 4;
-	}
-
-	if (start < _paletteDirtyStart)
-		_paletteDirtyStart = start;
-
-	if (start + num > _paletteDirtyEnd)
-		_paletteDirtyEnd = start + num;
-
-	// Some games blink cursors with palette
-	if (_cursorPaletteDisabled)
-		blitCursor();
-}
-
-void OSystem_SDL::grabPalette(byte *colors, uint start, uint num) {
-	assert(colors);
-
-#ifdef USE_RGB_COLOR
-	assert(_screenFormat.bytesPerPixel == 1);
-#endif
-
-	const SDL_Color *base = _currentPalette + start;
-
-	for (uint i = 0; i < num; ++i) {
-		colors[i * 4] = base[i].r;
-		colors[i * 4 + 1] = base[i].g;
-		colors[i * 4 + 2] = base[i].b;
-		colors[i * 4 + 3] = 0xFF;
-	}
-}
-
-void OSystem_SDL::setCursorPalette(const byte *colors, uint start, uint num) {
-	assert(colors);
-	const byte *b = colors;
-	uint i;
-	SDL_Color *base = _cursorPalette + start;
-	for (i = 0; i < num; i++) {
-		base[i].r = b[0];
-		base[i].g = b[1];
-		base[i].b = b[2];
-		b += 4;
-	}
-
-	_cursorPaletteDisabled = false;
-	blitCursor();
-}
-
-
-void OSystem_SDL::setShakePos(int shake_pos) {
-	assert (_transactionMode == kTransactionNone);
-
-	_newShakePos = shake_pos;
-}
-
-
-#pragma mark -
-#pragma mark --- Overlays ---
-#pragma mark -
-
-void OSystem_SDL::showOverlay() {
-	assert (_transactionMode == kTransactionNone);
-
-	int x, y;
-
-	if (_overlayVisible)
-		return;
-
-	_overlayVisible = true;
-
-	// Since resolution could change, put mouse to adjusted position
-	// Fixes bug #1349059
-	x = _mouseCurState.x * _videoMode.scaleFactor;
-	if (_videoMode.aspectRatioCorrection)
-		y = real2Aspect(_mouseCurState.y) * _videoMode.scaleFactor;
-	else
-		y = _mouseCurState.y * _videoMode.scaleFactor;
-
-	warpMouse(x, y);
-
-	clearOverlay();
-}
-
-void OSystem_SDL::hideOverlay() {
-	assert (_transactionMode == kTransactionNone);
-
-	if (!_overlayVisible)
-		return;
-
-	int x, y;
-
-	_overlayVisible = false;
-
-	// Since resolution could change, put mouse to adjusted position
-	// Fixes bug #1349059
-	x = _mouseCurState.x / _videoMode.scaleFactor;
-	y = _mouseCurState.y / _videoMode.scaleFactor;
-	if (_videoMode.aspectRatioCorrection)
-		y = aspect2Real(y);
-
-	warpMouse(x, y);
-
-	clearOverlay();
-
-	_forceFull = true;
-}
-
-void OSystem_SDL::clearOverlay() {
-	//assert (_transactionMode == kTransactionNone);
-
-	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
-
-	if (!_overlayVisible)
-		return;
-
-	// Clear the overlay by making the game screen "look through" everywhere.
-	SDL_Rect src, dst;
-	src.x = src.y = 0;
-	dst.x = dst.y = 1;
-	src.w = dst.w = _videoMode.screenWidth;
-	src.h = dst.h = _videoMode.screenHeight;
-	if (SDL_BlitSurface(_screen, &src, _tmpscreen, &dst) != 0)
-		error("SDL_BlitSurface failed: %s", SDL_GetError());
-
-	SDL_LockSurface(_tmpscreen);
-	SDL_LockSurface(_overlayscreen);
-	_scalerProc((byte *)(_tmpscreen->pixels) + _tmpscreen->pitch + 2, _tmpscreen->pitch,
-	(byte *)_overlayscreen->pixels, _overlayscreen->pitch, _videoMode.screenWidth, _videoMode.screenHeight);
-
-#ifdef USE_SCALERS
-	if (_videoMode.aspectRatioCorrection)
-		stretch200To240((uint8 *)_overlayscreen->pixels, _overlayscreen->pitch,
-						_videoMode.overlayWidth, _videoMode.screenHeight * _videoMode.scaleFactor, 0, 0, 0);
-#endif
-	SDL_UnlockSurface(_tmpscreen);
-	SDL_UnlockSurface(_overlayscreen);
-
-	_forceFull = true;
-}
-
-void OSystem_SDL::grabOverlay(OverlayColor *buf, int pitch) {
-	assert (_transactionMode == kTransactionNone);
-
-	if (_overlayscreen == NULL)
-		return;
-
-	if (SDL_LockSurface(_overlayscreen) == -1)
-		error("SDL_LockSurface failed: %s", SDL_GetError());
-
-	byte *src = (byte *)_overlayscreen->pixels;
-	int h = _videoMode.overlayHeight;
-	do {
-		memcpy(buf, src, _videoMode.overlayWidth * 2);
-		src += _overlayscreen->pitch;
-		buf += pitch;
-	} while (--h);
-
-	SDL_UnlockSurface(_overlayscreen);
-}
-
-void OSystem_SDL::copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h) {
-	assert (_transactionMode == kTransactionNone);
-
-	if (_overlayscreen == NULL)
-		return;
-
-	// Clip the coordinates
-	if (x < 0) {
-		w += x;
-		buf -= x;
-		x = 0;
-	}
-
-	if (y < 0) {
-		h += y; buf -= y * pitch;
-		y = 0;
-	}
-
-	if (w > _videoMode.overlayWidth - x) {
-		w = _videoMode.overlayWidth - x;
-	}
-
-	if (h > _videoMode.overlayHeight - y) {
-		h = _videoMode.overlayHeight - y;
-	}
-
-	if (w <= 0 || h <= 0)
-		return;
-
-	// Mark the modified region as dirty
-	addDirtyRect(x, y, w, h);
-
-	if (SDL_LockSurface(_overlayscreen) == -1)
-		error("SDL_LockSurface failed: %s", SDL_GetError());
-
-	byte *dst = (byte *)_overlayscreen->pixels + y * _overlayscreen->pitch + x * 2;
-	do {
-		memcpy(dst, buf, w * 2);
-		dst += _overlayscreen->pitch;
-		buf += pitch;
-	} while (--h);
-
-	SDL_UnlockSurface(_overlayscreen);
-}
-
-
-#pragma mark -
-#pragma mark --- Mouse ---
-#pragma mark -
-
-bool OSystem_SDL::showMouse(bool visible) {
-	if (_mouseVisible == visible)
-		return visible;
-
-	bool last = _mouseVisible;
-	_mouseVisible = visible;
-	_mouseNeedsRedraw = true;
-
-	return last;
-}
-
-void OSystem_SDL::setMousePos(int x, int y) {
-	if (x != _mouseCurState.x || y != _mouseCurState.y) {
-		_mouseNeedsRedraw = true;
-		_mouseCurState.x = x;
-		_mouseCurState.y = y;
-	}
-}
-
-void OSystem_SDL::warpMouse(int x, int y) {
-	int y1 = y;
-
-	// Don't change actual mouse position, when mouse is outside of our window (in case of windowed mode)
-	if (!(SDL_GetAppState( ) & SDL_APPMOUSEFOCUS)) {
-		setMousePos(x, y); // but change game cursor position
-		return;
-	}
-
-	if (_videoMode.aspectRatioCorrection && !_overlayVisible)
-		y1 = real2Aspect(y);
-
-	if (_mouseCurState.x != x || _mouseCurState.y != y) {
-		if (!_overlayVisible)
-			SDL_WarpMouse(x * _videoMode.scaleFactor, y1 * _videoMode.scaleFactor);
-		else
-			SDL_WarpMouse(x, y1);
-
-		// SDL_WarpMouse() generates a mouse movement event, so
-		// setMousePos() would be called eventually. However, the
-		// cannon script in CoMI calls this function twice each time
-		// the cannon is reloaded. Unless we update the mouse position
-		// immediately the second call is ignored, causing the cannon
-		// to change its aim.
-
-		setMousePos(x, y);
-	}
-}
-
-void OSystem_SDL::setMouseCursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y, uint32 keycolor, int cursorTargetScale, const Graphics::PixelFormat *format) {
-#ifdef USE_RGB_COLOR
-	if (!format)
-		_cursorFormat = Graphics::PixelFormat::createFormatCLUT8();
-	else if (format->bytesPerPixel <= _screenFormat.bytesPerPixel)
-		_cursorFormat = *format;
-
-	if (_cursorFormat.bytesPerPixel < 4)
-		assert(keycolor < (uint)(1 << (_cursorFormat.bytesPerPixel << 3)));
-#else
-	assert(keycolor <= 0xFF);
-#endif
-
-	if (w == 0 || h == 0)
-		return;
-
-	_mouseCurState.hotX = hotspot_x;
-	_mouseCurState.hotY = hotspot_y;
-
-	_mouseKeyColor = keycolor;
-
-	_cursorTargetScale = cursorTargetScale;
-
-	if (_mouseCurState.w != (int)w || _mouseCurState.h != (int)h) {
-		_mouseCurState.w = w;
-		_mouseCurState.h = h;
-
-		if (_mouseOrigSurface)
-			SDL_FreeSurface(_mouseOrigSurface);
-
-		// Allocate bigger surface because AdvMame2x adds black pixel at [0,0]
-		_mouseOrigSurface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA,
-						_mouseCurState.w + 2,
-						_mouseCurState.h + 2,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-
-		if (_mouseOrigSurface == NULL)
-			error("allocating _mouseOrigSurface failed");
-		SDL_SetColorKey(_mouseOrigSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, kMouseColorKey);
-	}
-
-	free(_mouseData);
-#ifdef USE_RGB_COLOR
-	_mouseData = (byte *)malloc(w * h * _cursorFormat.bytesPerPixel);
-	memcpy(_mouseData, buf, w * h * _cursorFormat.bytesPerPixel);
-#else
-	_mouseData = (byte *)malloc(w * h);
-	memcpy(_mouseData, buf, w * h);
-#endif
-
-	blitCursor();
-}
-
-void OSystem_SDL::blitCursor() {
-	byte *dstPtr;
-	const byte *srcPtr = _mouseData;
-#ifdef USE_RGB_COLOR
-	uint32 color;
-#else
-	byte color;
-#endif
-	int w, h, i, j;
-
-	if (!_mouseOrigSurface || !_mouseData)
-		return;
-
-	_mouseNeedsRedraw = true;
-
-	w = _mouseCurState.w;
-	h = _mouseCurState.h;
-
-	SDL_LockSurface(_mouseOrigSurface);
-
-	// Make whole surface transparent
-	for (i = 0; i < h + 2; i++) {
-		dstPtr = (byte *)_mouseOrigSurface->pixels + _mouseOrigSurface->pitch * i;
-		for (j = 0; j < w + 2; j++) {
-			*(uint16 *)dstPtr = kMouseColorKey;
-			dstPtr += 2;
-		}
-	}
-
-	// Draw from [1,1] since AdvMame2x adds artefact at 0,0
-	dstPtr = (byte *)_mouseOrigSurface->pixels + _mouseOrigSurface->pitch + 2;
-
-	SDL_Color *palette;
-
-	if (_cursorPaletteDisabled)
-		palette = _currentPalette;
-	else
-		palette = _cursorPalette;
-
-	for (i = 0; i < h; i++) {
-		for (j = 0; j < w; j++) {
-#ifdef USE_RGB_COLOR
-			if (_cursorFormat.bytesPerPixel > 1) {
-				if (_cursorFormat.bytesPerPixel == 2)
-					color = *(const uint16 *)srcPtr;
-				else
-					color = *(const uint32 *)srcPtr;
-				if (color != _mouseKeyColor) {	// transparent, don't draw
-					uint8 r, g, b;
-					_cursorFormat.colorToRGB(color, r, g, b);
-					*(uint16 *)dstPtr = SDL_MapRGB(_mouseOrigSurface->format,
-						r, g, b);
-				}
-				dstPtr += 2;
-				srcPtr += _cursorFormat.bytesPerPixel;
-			} else {
-#endif
-				color = *srcPtr;
-				if (color != _mouseKeyColor) {	// transparent, don't draw
-					*(uint16 *)dstPtr = SDL_MapRGB(_mouseOrigSurface->format,
-						palette[color].r, palette[color].g, palette[color].b);
-				}
-				dstPtr += 2;
-				srcPtr++;
-#ifdef USE_RGB_COLOR
-			}
-#endif
-		}
-		dstPtr += _mouseOrigSurface->pitch - w * 2;
-	}
-
-	int rW, rH;
-
-	if (_cursorTargetScale >= _videoMode.scaleFactor) {
-		// The cursor target scale is greater or equal to the scale at
-		// which the rest of the screen is drawn. We do not downscale
-		// the cursor image, we draw it at its original size. It will
-		// appear too large on screen.
-
-		rW = w;
-		rH = h;
-		_mouseCurState.rHotX = _mouseCurState.hotX;
-		_mouseCurState.rHotY = _mouseCurState.hotY;
-
-		// The virtual dimensions may be larger than the original.
-
-		_mouseCurState.vW = w * _cursorTargetScale / _videoMode.scaleFactor;
-		_mouseCurState.vH = h * _cursorTargetScale / _videoMode.scaleFactor;
-		_mouseCurState.vHotX = _mouseCurState.hotX * _cursorTargetScale /
-			_videoMode.scaleFactor;
-		_mouseCurState.vHotY = _mouseCurState.hotY * _cursorTargetScale /
-			_videoMode.scaleFactor;
-	} else {
-		// The cursor target scale is smaller than the scale at which
-		// the rest of the screen is drawn. We scale up the cursor
-		// image to make it appear correct.
-
-		rW = w * _videoMode.scaleFactor / _cursorTargetScale;
-		rH = h * _videoMode.scaleFactor / _cursorTargetScale;
-		_mouseCurState.rHotX = _mouseCurState.hotX * _videoMode.scaleFactor /
-			_cursorTargetScale;
-		_mouseCurState.rHotY = _mouseCurState.hotY * _videoMode.scaleFactor /
-			_cursorTargetScale;
-
-		// The virtual dimensions will be the same as the original.
-
-		_mouseCurState.vW = w;
-		_mouseCurState.vH = h;
-		_mouseCurState.vHotX = _mouseCurState.hotX;
-		_mouseCurState.vHotY = _mouseCurState.hotY;
-	}
-
-#ifdef USE_SCALERS
-	int rH1 = rH; // store original to pass to aspect-correction function later
-#endif
-
-	if (_videoMode.aspectRatioCorrection && _cursorTargetScale == 1) {
-		rH = real2Aspect(rH - 1) + 1;
-		_mouseCurState.rHotY = real2Aspect(_mouseCurState.rHotY);
-	}
-
-	if (_mouseCurState.rW != rW || _mouseCurState.rH != rH) {
-		_mouseCurState.rW = rW;
-		_mouseCurState.rH = rH;
-
-		if (_mouseSurface)
-			SDL_FreeSurface(_mouseSurface);
-
-		_mouseSurface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA,
-						_mouseCurState.rW,
-						_mouseCurState.rH,
-						16,
-						_hwscreen->format->Rmask,
-						_hwscreen->format->Gmask,
-						_hwscreen->format->Bmask,
-						_hwscreen->format->Amask);
-
-		if (_mouseSurface == NULL)
-			error("allocating _mouseSurface failed");
-
-		SDL_SetColorKey(_mouseSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, kMouseColorKey);
-	}
-
-	SDL_LockSurface(_mouseSurface);
-
-	ScalerProc *scalerProc;
-
-	// If possible, use the same scaler for the cursor as for the rest of
-	// the game. This only works well with the non-blurring scalers so we
-	// actually only use the 1x, 1.5x, 2x and AdvMame scalers.
-
-	if (_cursorTargetScale == 1 && (_videoMode.mode == GFX_DOUBLESIZE || _videoMode.mode == GFX_TRIPLESIZE))
-		scalerProc = _scalerProc;
-	else
-		scalerProc = scalersMagn[_cursorTargetScale - 1][_videoMode.scaleFactor - 1];
-
-	scalerProc((byte *)_mouseOrigSurface->pixels + _mouseOrigSurface->pitch + 2,
-		_mouseOrigSurface->pitch, (byte *)_mouseSurface->pixels, _mouseSurface->pitch,
-		_mouseCurState.w, _mouseCurState.h);
-
-#ifdef USE_SCALERS
-	if (_videoMode.aspectRatioCorrection && _cursorTargetScale == 1)
-		cursorStretch200To240((uint8 *)_mouseSurface->pixels, _mouseSurface->pitch, rW, rH1, 0, 0, 0);
-#endif
-
-	SDL_UnlockSurface(_mouseSurface);
-	SDL_UnlockSurface(_mouseOrigSurface);
-}
-
-#ifdef USE_SCALERS
-// Basically it is kVeryFastAndUglyAspectMode of stretch200To240 from
-// common/scale/aspect.cpp
-static int cursorStretch200To240(uint8 *buf, uint32 pitch, int width, int height, int srcX, int srcY, int origSrcY) {
-	int maxDstY = real2Aspect(origSrcY + height - 1);
-	int y;
-	const uint8 *startSrcPtr = buf + srcX * 2 + (srcY - origSrcY) * pitch;
-	uint8 *dstPtr = buf + srcX * 2 + maxDstY * pitch;
-
-	for (y = maxDstY; y >= srcY; y--) {
-		const uint8 *srcPtr = startSrcPtr + aspect2Real(y) * pitch;
-
-		if (srcPtr == dstPtr)
-			break;
-		memcpy(dstPtr, srcPtr, width * 2);
-		dstPtr -= pitch;
-	}
-
-	return 1 + maxDstY - srcY;
-}
-#endif
-
-void OSystem_SDL::toggleMouseGrab() {
-	if (SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_OFF)
-		SDL_WM_GrabInput(SDL_GRAB_ON);
-	else
-		SDL_WM_GrabInput(SDL_GRAB_OFF);
-}
-
-void OSystem_SDL::undrawMouse() {
-	const int x = _mouseBackup.x;
-	const int y = _mouseBackup.y;
-
-	// When we switch bigger overlay off mouse jumps. Argh!
-	// This is intended to prevent undrawing offscreen mouse
-	if (!_overlayVisible && (x >= _videoMode.screenWidth || y >= _videoMode.screenHeight))
-		return;
-
-	if (_mouseBackup.w != 0 && _mouseBackup.h != 0)
-		addDirtyRect(x, y - _currentShakePos, _mouseBackup.w, _mouseBackup.h);
-}
-
-void OSystem_SDL::drawMouse() {
-	if (!_mouseVisible || !_mouseSurface) {
-		_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
-		return;
-	}
-
-	SDL_Rect dst;
-	int scale;
-	int hotX, hotY;
-
-	dst.x = _mouseCurState.x;
-	dst.y = _mouseCurState.y;
-
-	if (!_overlayVisible) {
-		scale = _videoMode.scaleFactor;
-		dst.w = _mouseCurState.vW;
-		dst.h = _mouseCurState.vH;
-		hotX = _mouseCurState.vHotX;
-		hotY = _mouseCurState.vHotY;
-	} else {
-		scale = 1;
-		dst.w = _mouseCurState.rW;
-		dst.h = _mouseCurState.rH;
-		hotX = _mouseCurState.rHotX;
-		hotY = _mouseCurState.rHotY;
-	}
-
-	// The mouse is undrawn using virtual coordinates, i.e. they may be
-	// scaled and aspect-ratio corrected.
-
-	_mouseBackup.x = dst.x - hotX;
-	_mouseBackup.y = dst.y - hotY;
-	_mouseBackup.w = dst.w;
-	_mouseBackup.h = dst.h;
-
-	// We draw the pre-scaled cursor image, so now we need to adjust for
-	// scaling, shake position and aspect ratio correction manually.
-
-	if (!_overlayVisible) {
-		dst.y += _currentShakePos;
-	}
-
-	if (_videoMode.aspectRatioCorrection && !_overlayVisible)
-		dst.y = real2Aspect(dst.y);
-
-	dst.x = scale * dst.x - _mouseCurState.rHotX;
-	dst.y = scale * dst.y - _mouseCurState.rHotY;
-	dst.w = _mouseCurState.rW;
-	dst.h = _mouseCurState.rH;
-
-	// Note that SDL_BlitSurface() and addDirtyRect() will both perform any
-	// clipping necessary
-
-	if (SDL_BlitSurface(_mouseSurface, NULL, _hwscreen, &dst) != 0)
-		error("SDL_BlitSurface failed: %s", SDL_GetError());
-
-	// The screen will be updated using real surface coordinates, i.e.
-	// they will not be scaled or aspect-ratio corrected.
-
-	addDirtyRect(dst.x, dst.y, dst.w, dst.h, true);
-}
-
-#pragma mark -
-#pragma mark --- On Screen Display ---
-#pragma mark -
-
-#ifdef USE_OSD
-void OSystem_SDL::displayMessageOnOSD(const char *msg) {
-	assert (_transactionMode == kTransactionNone);
-	assert(msg);
-
-	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
-
-	uint i;
-
-	// Lock the OSD surface for drawing
-	if (SDL_LockSurface(_osdSurface))
-		error("displayMessageOnOSD: SDL_LockSurface failed: %s", SDL_GetError());
-
-	Graphics::Surface dst;
-	dst.pixels = _osdSurface->pixels;
-	dst.w = _osdSurface->w;
-	dst.h = _osdSurface->h;
-	dst.pitch = _osdSurface->pitch;
-	dst.bytesPerPixel = _osdSurface->format->BytesPerPixel;
-
-	// The font we are going to use:
-	const Graphics::Font *font = FontMan.getFontByUsage(Graphics::FontManager::kOSDFont);
-
-	// Clear everything with the "transparent" color, i.e. the colorkey
-	SDL_FillRect(_osdSurface, 0, kOSDColorKey);
-
-	// Split the message into separate lines.
-	Common::Array<Common::String> lines;
-	const char *ptr;
-	for (ptr = msg; *ptr; ++ptr) {
-		if (*ptr == '\n') {
-			lines.push_back(Common::String(msg, ptr - msg));
-			msg = ptr + 1;
-		}
-	}
-	lines.push_back(Common::String(msg, ptr - msg));
-
-	// Determine a rect which would contain the message string (clipped to the
-	// screen dimensions).
-	const int vOffset = 6;
-	const int lineSpacing = 1;
-	const int lineHeight = font->getFontHeight() + 2 * lineSpacing;
-	int width = 0;
-	int height = lineHeight * lines.size() + 2 * vOffset;
-	for (i = 0; i < lines.size(); i++) {
-		width = MAX(width, font->getStringWidth(lines[i]) + 14);
-	}
-
-	// Clip the rect
-	if (width > dst.w)
-		width = dst.w;
-	if (height > dst.h)
-		height = dst.h;
-
-	// Draw a dark gray rect
-	// TODO: Rounded corners ? Border?
-	SDL_Rect osdRect;
-	osdRect.x = (dst.w - width) / 2;
-	osdRect.y = (dst.h - height) / 2;
-	osdRect.w = width;
-	osdRect.h = height;
-	SDL_FillRect(_osdSurface, &osdRect, SDL_MapRGB(_osdSurface->format, 64, 64, 64));
-
-	// Render the message, centered, and in white
-	for (i = 0; i < lines.size(); i++) {
-		font->drawString(&dst, lines[i],
-							osdRect.x, osdRect.y + i * lineHeight + vOffset + lineSpacing, osdRect.w,
-							SDL_MapRGB(_osdSurface->format, 255, 255, 255),
-							Graphics::kTextAlignCenter);
-	}
-
-	// Finished drawing, so unlock the OSD surface again
-	SDL_UnlockSurface(_osdSurface);
-
-	// Init the OSD display parameters, and the fade out
-	_osdAlpha = SDL_ALPHA_TRANSPARENT +  kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
-	_osdFadeStartTime = SDL_GetTicks() + kOSDFadeOutDelay;
-	SDL_SetAlpha(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdAlpha);
-
-	// Ensure a full redraw takes place next time the screen is updated
-	_forceFull = true;
-}
-#endif
-
-
-#pragma mark -
-#pragma mark --- Misc ---
-#pragma mark -
-
-bool OSystem_SDL::handleScalerHotkeys(const SDL_KeyboardEvent &key) {
-	// Ctrl-Alt-a toggles aspect ratio correction
-	if (key.keysym.sym == 'a') {
-		beginGFXTransaction();
-			setFeatureState(kFeatureAspectRatioCorrection, !_videoMode.aspectRatioCorrection);
-		endGFXTransaction();
-#ifdef USE_OSD
-		char buffer[128];
-		if (_videoMode.aspectRatioCorrection)
-			sprintf(buffer, "Enabled aspect ratio correction\n%d x %d -> %d x %d",
-				_videoMode.screenWidth, _videoMode.screenHeight,
-				_hwscreen->w, _hwscreen->h
-				);
-		else
-			sprintf(buffer, "Disabled aspect ratio correction\n%d x %d -> %d x %d",
-				_videoMode.screenWidth, _videoMode.screenHeight,
-				_hwscreen->w, _hwscreen->h
-				);
-		displayMessageOnOSD(buffer);
-#endif
-		internUpdateScreen();
-		return true;
-	}
-
-	int newMode = -1;
-	int factor = _videoMode.scaleFactor - 1;
-
-	// Increase/decrease the scale factor
-	if (key.keysym.sym == SDLK_EQUALS || key.keysym.sym == SDLK_PLUS || key.keysym.sym == SDLK_MINUS ||
-		key.keysym.sym == SDLK_KP_PLUS || key.keysym.sym == SDLK_KP_MINUS) {
-		factor += (key.keysym.sym == SDLK_MINUS || key.keysym.sym == SDLK_KP_MINUS) ? -1 : +1;
-		if (0 <= factor && factor <= 3) {
-			newMode = s_gfxModeSwitchTable[_scalerType][factor];
-		}
-	}
-
-	const bool isNormalNumber = (SDLK_1 <= key.keysym.sym && key.keysym.sym <= SDLK_9);
-	const bool isKeypadNumber = (SDLK_KP1 <= key.keysym.sym && key.keysym.sym <= SDLK_KP9);
-	if (isNormalNumber || isKeypadNumber) {
-		_scalerType = key.keysym.sym - (isNormalNumber ? SDLK_1 : SDLK_KP1);
-		if (_scalerType >= ARRAYSIZE(s_gfxModeSwitchTable))
-			return false;
-
-		while (s_gfxModeSwitchTable[_scalerType][factor] < 0) {
-			assert(factor > 0);
-			factor--;
-		}
-		newMode = s_gfxModeSwitchTable[_scalerType][factor];
-	}
-
-	if (newMode >= 0) {
-		beginGFXTransaction();
-			setGraphicsMode(newMode);
-		endGFXTransaction();
-#ifdef USE_OSD
-		if (_osdSurface) {
-			const char *newScalerName = 0;
-			const GraphicsMode *g = getSupportedGraphicsModes();
-			while (g->name) {
-				if (g->id == _videoMode.mode) {
-					newScalerName = g->description;
-					break;
-				}
-				g++;
-			}
-			if (newScalerName) {
-				char buffer[128];
-				sprintf(buffer, "Active graphics filter: %s\n%d x %d -> %d x %d",
-					newScalerName,
-					_videoMode.screenWidth, _videoMode.screenHeight,
-					_hwscreen->w, _hwscreen->h
-					);
-				displayMessageOnOSD(buffer);
-			}
-		}
-#endif
-		internUpdateScreen();
-
-		return true;
-	} else {
-		return false;
-	}
-}
-
-bool OSystem_SDL::isScalerHotkey(const Common::Event &event) {
-	if ((event.kbd.flags & (Common::KBD_CTRL|Common::KBD_ALT)) == (Common::KBD_CTRL|Common::KBD_ALT)) {
-		const bool isNormalNumber = (Common::KEYCODE_1 <= event.kbd.keycode && event.kbd.keycode <= Common::KEYCODE_9);
-		const bool isKeypadNumber = (Common::KEYCODE_KP1 <= event.kbd.keycode && event.kbd.keycode <= Common::KEYCODE_KP9);
-		const bool isScaleKey = (event.kbd.keycode == Common::KEYCODE_EQUALS || 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);
-
-		if (isNormalNumber || isKeypadNumber) {
-			int keyValue = event.kbd.keycode - (isNormalNumber ? Common::KEYCODE_1 : Common::KEYCODE_KP1);
-			if (keyValue >= ARRAYSIZE(s_gfxModeSwitchTable))
-				return false;
-		}
-		return (isScaleKey || event.kbd.keycode == 'a');
-	}
-	return false;
-}
diff --git a/backends/platform/sdl/macosx/macosx-main.cpp b/backends/platform/sdl/macosx/macosx-main.cpp
new file mode 100644
index 0000000000..023860b19f
--- /dev/null
+++ b/backends/platform/sdl/macosx/macosx-main.cpp
@@ -0,0 +1,54 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef MACOSX
+
+#include "backends/platform/sdl/macosx/macosx.h"
+#include "backends/plugins/sdl/sdl-provider.h"
+#include "base/main.h"
+
+int main(int argc, char *argv[]) {
+
+	// Create our OSystem instance
+	g_system = new OSystem_MacOSX();
+	assert(g_system);
+
+	// Pre initialize the backend
+	((OSystem_MacOSX *)g_system)->init();
+
+#ifdef DYNAMIC_MODULES
+	PluginManager::instance().addPluginProvider(new SDLPluginProvider());
+#endif
+
+	// Invoke the actual ScummVM main entry point:
+	int res = scummvm_main(argc, argv);
+
+	// Free OSystem
+	delete (OSystem_MacOSX *)g_system;
+
+	return res;
+}
+
+#endif
diff --git a/backends/platform/sdl/macosx/macosx.cpp b/backends/platform/sdl/macosx/macosx.cpp
new file mode 100644
index 0000000000..814badbca4
--- /dev/null
+++ b/backends/platform/sdl/macosx/macosx.cpp
@@ -0,0 +1,79 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef MACOSX
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/platform/sdl/macosx/macosx.h"
+#include "backends/mixer/doublebuffersdl/doublebuffersdl-mixer.h"
+
+#include "common/archive.h"
+#include "common/fs.h"
+
+#include "CoreFoundation/CoreFoundation.h"
+
+OSystem_MacOSX::OSystem_MacOSX()
+	:
+	OSystem_POSIX("Library/Preferences/ScummVM Preferences") {
+}
+
+void OSystem_MacOSX::initBackend() {
+	// Create the mixer manager
+	if (_mixer == 0) {
+		_mixerManager = new DoubleBufferSDLMixerManager();
+
+		// Setup and start mixer
+		_mixerManager->init();
+	}
+
+	// Invoke parent implementation of this method
+	OSystem_POSIX::initBackend();
+}
+
+void OSystem_MacOSX::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
+	// Invoke parent implementation of this method
+	OSystem_POSIX::addSysArchivesToSearchSet(s, priority);
+
+	// Get URL of the Resource directory of the .app bundle
+	CFURLRef fileUrl = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
+	if (fileUrl) {
+		// Try to convert the URL to an absolute path
+		UInt8 buf[MAXPATHLEN];
+		if (CFURLGetFileSystemRepresentation(fileUrl, true, buf, sizeof(buf))) {
+			// Success: Add it to the search path
+			Common::String bundlePath((const char *)buf);
+			s.add("__OSX_BUNDLE__", new Common::FSDirectory(bundlePath), priority);
+		}
+		CFRelease(fileUrl);
+	}
+}
+
+void OSystem_MacOSX::setupIcon() {
+	// Don't set icon on OS X, as we use a nicer external icon there. 
+}
+
+#endif
diff --git a/backends/platform/sdl/macosx/macosx.h b/backends/platform/sdl/macosx/macosx.h
new file mode 100644
index 0000000000..3c583a0ac0
--- /dev/null
+++ b/backends/platform/sdl/macosx/macosx.h
@@ -0,0 +1,41 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef PLATFORM_SDL_MACOSX_H
+#define PLATFORM_SDL_MACOSX_H
+
+#include "backends/platform/sdl/posix/posix.h"
+
+class OSystem_MacOSX : public OSystem_POSIX {
+public:
+	OSystem_MacOSX();
+	virtual ~OSystem_MacOSX() {}
+
+	virtual void initBackend();
+	virtual void addSysArchivesToSearchSet(Common::SearchSet &s, int priority = 0);
+	virtual void setupIcon();
+};
+
+#endif
diff --git a/backends/platform/sdl/main.cpp b/backends/platform/sdl/main.cpp
index a9e1f5cf4b..14cfaaee57 100644
--- a/backends/platform/sdl/main.cpp
+++ b/backends/platform/sdl/main.cpp
@@ -23,50 +23,44 @@
  *
  */
 
-#define FORBIDDEN_SYMBOL_ALLOW_ALL
-
-// Fix for bug #2895217 "MSVC compilation broken with r47595":
-// We need to keep this on top of the "common/scummsys.h" include,
-// otherwise we will get errors about the windows headers redefining
-// "ARRAYSIZE" for example.
-#if defined(WIN32) && !defined(__SYMBIAN32__)
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-// winnt.h defines ARRAYSIZE, but we want our own one...
-#undef ARRAYSIZE
-#endif
-
 #include "common/scummsys.h"
 
 // Several SDL based ports use a custom main, and hence do not want to compile
 // of this file. The following "#if" ensures that.
-#if !defined(__MAEMO__) && !defined(__SYMBIAN32__) && !defined(_WIN32_WCE) && !defined(DINGUX) && !defined(GPH_DEVICE) && !defined(LINUXMOTO) && !defined(OPENPANDORA)
-
+#if !defined(UNIX) && \
+    !defined(WIN32) && \
+    !defined(__MAEMO__) && \
+    !defined(__SYMBIAN32__) && \
+    !defined(_WIN32_WCE) && \
+    !defined(__amigaos4__) && \
+    !defined(DINGUX) && \
+    !defined(CAANOO) && \
+    !defined(LINUXMOTO) && \
+    !defined(OPENPANDORA)
 
 #include "backends/platform/sdl/sdl.h"
 #include "backends/plugins/sdl/sdl-provider.h"
 #include "base/main.h"
 
-#ifdef WIN32
-int __stdcall WinMain(HINSTANCE /*hInst*/, HINSTANCE /*hPrevInst*/,  LPSTR /*lpCmdLine*/, int /*iShowCmd*/) {
-	SDL_SetModuleHandle(GetModuleHandle(NULL));
-	return main(__argc, __argv);
-}
-#endif
-
 int main(int argc, char *argv[]) {
 
 	// Create our OSystem instance
 	g_system = new OSystem_SDL();
 	assert(g_system);
 
+	// Pre initialize the backend
+	((OSystem_SDL *)g_system)->init();
+
 #ifdef DYNAMIC_MODULES
 	PluginManager::instance().addPluginProvider(new SDLPluginProvider());
 #endif
 
 	// Invoke the actual ScummVM main entry point:
 	int res = scummvm_main(argc, argv);
-	((OSystem_SDL *)g_system)->deinit();
+
+	// Free OSystem
+	delete (OSystem_SDL *)g_system;
+
 	return res;
 }
 
diff --git a/backends/platform/sdl/module.mk b/backends/platform/sdl/module.mk
index 43751a57b2..c7ee32db16 100644
--- a/backends/platform/sdl/module.mk
+++ b/backends/platform/sdl/module.mk
@@ -1,12 +1,30 @@
 MODULE := backends/platform/sdl
 
 MODULE_OBJS := \
-	events.o \
-	graphics.o \
+	posix/posix-main.o \
+	posix/posix.o \
 	hardwarekeys.o \
 	main.o \
 	sdl.o
 
+ifdef MACOSX
+MODULE_OBJS += \
+	macosx/macosx-main.o \
+	macosx/macosx.o
+endif
+
+ifdef WIN32
+MODULE_OBJS += \
+	win32/win32-main.o \
+	win32/win32.o
+endif
+
+ifdef AMIGAOS
+MODULE_OBJS += \
+	amigaos/amigaos-main.o \
+	amigaos/amigaos.o
+endif
+
 # We don't use rules.mk but rather manually update OBJS and MODULE_DIRS.
 MODULE_OBJS := $(addprefix $(MODULE)/, $(MODULE_OBJS))
 OBJS := $(MODULE_OBJS) $(OBJS)
diff --git a/backends/platform/sdl/posix/posix-main.cpp b/backends/platform/sdl/posix/posix-main.cpp
new file mode 100644
index 0000000000..de9eb2b7ef
--- /dev/null
+++ b/backends/platform/sdl/posix/posix-main.cpp
@@ -0,0 +1,54 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if defined(UNIX) && !defined(MACOSX) && !defined(SAMSUNGTV) && !defined(LINUXMOTO) && !defined(GP2XWIZ) && !defined(GP2X) && !defined(DINGUX)
+
+#include "backends/platform/sdl/posix/posix.h"
+#include "backends/plugins/sdl/sdl-provider.h"
+#include "base/main.h"
+
+int main(int argc, char *argv[]) {
+
+	// Create our OSystem instance
+	g_system = new OSystem_POSIX();
+	assert(g_system);
+
+	// Pre initialize the backend
+	((OSystem_POSIX *)g_system)->init();
+
+#ifdef DYNAMIC_MODULES
+	PluginManager::instance().addPluginProvider(new SDLPluginProvider());
+#endif
+
+	// Invoke the actual ScummVM main entry point:
+	int res = scummvm_main(argc, argv);
+
+	// Free OSystem
+	delete (OSystem_POSIX *)g_system;
+
+	return res;
+}
+
+#endif
diff --git a/backends/platform/sdl/posix/posix.cpp b/backends/platform/sdl/posix/posix.cpp
new file mode 100644
index 0000000000..c9c7304c0f
--- /dev/null
+++ b/backends/platform/sdl/posix/posix.cpp
@@ -0,0 +1,68 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef UNIX
+
+#include "backends/platform/sdl/posix/posix.h"
+#include "backends/saves/posix/posix-saves.h"
+#include "backends/fs/posix/posix-fs-factory.h"
+
+OSystem_POSIX::OSystem_POSIX(Common::String baseConfigName)
+	:
+	_baseConfigName(baseConfigName) {
+}
+
+void OSystem_POSIX::init() {
+	// Initialze File System Factory
+	_fsFactory = new POSIXFilesystemFactory();
+
+	// Invoke parent implementation of this method
+	OSystem_SDL::init();
+}
+
+void OSystem_POSIX::initBackend() {
+	// Create the savefile manager
+	if (_savefileManager == 0)
+		_savefileManager = new POSIXSaveFileManager();
+
+	// Invoke parent implementation of this method
+	OSystem_SDL::initBackend();
+}
+
+Common::String OSystem_POSIX::getDefaultConfigFileName() {
+	char configFile[MAXPATHLEN];
+
+	// On UNIX type systems, by default we store the config file inside
+	// to the HOME directory of the user.
+	const char *home = getenv("HOME");
+	if (home != NULL && strlen(home) < MAXPATHLEN)
+		snprintf(configFile, MAXPATHLEN, "%s/%s", home, _baseConfigName.c_str());
+	else
+		strcpy(configFile, _baseConfigName.c_str());
+
+	return configFile;
+}
+
+#endif
diff --git a/backends/platform/sdl/posix/posix.h b/backends/platform/sdl/posix/posix.h
new file mode 100644
index 0000000000..13f9304f1e
--- /dev/null
+++ b/backends/platform/sdl/posix/posix.h
@@ -0,0 +1,48 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef PLATFORM_SDL_POSIX_H
+#define PLATFORM_SDL_POSIX_H
+
+#include "backends/platform/sdl/sdl.h"
+
+class OSystem_POSIX : public OSystem_SDL {
+public:
+	// Let the subclasses be able to change _baseConfigName in the constructor
+	OSystem_POSIX(Common::String baseConfigName = ".scummvmrc");
+	virtual ~OSystem_POSIX() {}
+
+	virtual void init();
+	virtual void initBackend();
+
+protected:
+	// Base string for creating the default path and filename
+	// for the configuration file
+	Common::String _baseConfigName;
+
+	virtual Common::String getDefaultConfigFileName();
+};
+
+#endif
diff --git a/backends/platform/sdl/sdl.cpp b/backends/platform/sdl/sdl.cpp
index da6542f9e2..307cf39a97 100644
--- a/backends/platform/sdl/sdl.cpp
+++ b/backends/platform/sdl/sdl.cpp
@@ -26,28 +26,19 @@
 // Disable symbol overrides so that we can use system headers.
 #define FORBIDDEN_SYMBOL_ALLOW_ALL
 
-#if defined(WIN32)
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-// winnt.h defines ARRAYSIZE, but we want our own one... - this is needed before including util.h
-#undef ARRAYSIZE
-#endif
-
 #include "backends/platform/sdl/sdl.h"
-#include "common/archive.h"
 #include "common/config-manager.h"
-#include "common/debug.h"
 #include "common/EventRecorder.h"
-#include "common/util.h"
 
-#ifdef UNIX
-  #include "backends/saves/posix/posix-saves.h"
-#else
-  #include "backends/saves/default/default-saves.h"
-#endif
+#include "backends/saves/default/default-saves.h"
 #include "backends/audiocd/sdl/sdl-audiocd.h"
-#include "backends/timer/default/default-timer.h"
-#include "sound/mixer_intern.h"
+#include "backends/events/sdl/sdl-events.h"
+#include "backends/mutex/sdl/sdl-mutex.h"
+#include "backends/timer/sdl/sdl-timer.h"
+#include "backends/graphics/sdl/sdl-graphics.h"
+#ifdef USE_OPENGL
+#include "backends/graphics/openglsdl/openglsdl-graphics.h"
+#endif
 
 #include "icons/scummvm.xpm"
 
@@ -59,139 +50,29 @@
 #endif // !WIN32
 #endif
 
-//#define SAMPLES_PER_SEC 11025
-#define SAMPLES_PER_SEC 22050
-//#define SAMPLES_PER_SEC 44100
-
-
-/*
- * Include header files needed for the getFilesystemFactory() method.
- */
-#if defined(__amigaos4__)
-	#include "backends/fs/amigaos4/amigaos4-fs-factory.h"
-#elif defined(UNIX)
-	#include "backends/fs/posix/posix-fs-factory.h"
-#elif defined(WIN32)
-	#include "backends/fs/windows/windows-fs-factory.h"
-#endif
-
-
-#if defined(UNIX)
-#ifdef MACOSX
-#define DEFAULT_CONFIG_FILE "Library/Preferences/ScummVM Preferences"
-#elif defined(SAMSUNGTV)
-#define DEFAULT_CONFIG_FILE "/dtv/usb/sda1/.scummvmrc"
-#else
-#define DEFAULT_CONFIG_FILE ".scummvmrc"
-#endif
-#else
-#define DEFAULT_CONFIG_FILE "scummvm.ini"
-#endif
-
-#if defined(MACOSX) || defined(IPHONE)
-#include <CoreFoundation/CoreFoundation.h>
-#endif
-
-#if defined(UNIX)
-#include <errno.h>
-#include <sys/stat.h>
+OSystem_SDL::OSystem_SDL()
+	:
+#ifdef USE_OPENGL
+	_graphicsModes(0),
+	_graphicsMode(0),
+	_sdlModesCount(0),
+	_glModesCount(0),
 #endif
+	_inited(false),
+	_initedSDL(false),
+	_logger(0),
+	_mixerManager(0),
+	_eventSource(0) {
 
-static Uint32 timer_handler(Uint32 interval, void *param) {
-	((DefaultTimerManager *)param)->handler();
-	return interval;
-}
-
-AspectRatio::AspectRatio(int w, int h) {
-	// TODO : Validation and so on...
-	// Currently, we just ensure the program don't instantiate non-supported aspect ratios
-	_kw = w;
-	_kh = h;
 }
 
-#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__) && defined(USE_SCALERS)
-static AspectRatio getDesiredAspectRatio() {
-	const size_t AR_COUNT = 4;
-	const char*       desiredAspectRatioAsStrings[AR_COUNT] = {            "auto",            "4/3",            "16/9",            "16/10" };
-	const AspectRatio desiredAspectRatios[AR_COUNT]         = { AspectRatio(0, 0), AspectRatio(4,3), AspectRatio(16,9), AspectRatio(16,10) };
-
-	//TODO : We could parse an arbitrary string, if we code enough proper validation
-	Common::String desiredAspectRatio = ConfMan.get("desired_screen_aspect_ratio");
-
-	for (size_t i = 0; i < AR_COUNT; i++) {
-		assert(desiredAspectRatioAsStrings[i] != NULL);
-
-		if (!scumm_stricmp(desiredAspectRatio.c_str(), desiredAspectRatioAsStrings[i])) {
-			return desiredAspectRatios[i];
-		}
-	}
-	// TODO : Report a warning
-	return AspectRatio(0, 0);
+OSystem_SDL::~OSystem_SDL() {
+	deinit();
 }
-#endif
-
-#if defined(WIN32)
-	struct SdlConsoleHidingWin32 {
-		DWORD myPid;
-		DWORD myTid;
-		HWND consoleHandle;
-	};
-
-	// console hiding for win32
-	static BOOL CALLBACK initBackendFindConsoleWin32Proc(HWND hWnd, LPARAM lParam) {
-		DWORD pid, tid;
-		SdlConsoleHidingWin32 *variables = (SdlConsoleHidingWin32 *)lParam;
-		tid = GetWindowThreadProcessId(hWnd, &pid);
-		if ((tid == variables->myTid) && (pid == variables->myPid)) {
-			variables->consoleHandle = hWnd;
-			return FALSE;
-		}
-		return TRUE;
-	}
-#endif
-
-void OSystem_SDL::initBackend() {
-	assert(!_inited);
-
-	int joystick_num = ConfMan.getInt("joystick_num");
-	uint32 sdlFlags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
-
-	if (ConfMan.hasKey("disable_sdl_parachute"))
-		sdlFlags |= SDL_INIT_NOPARACHUTE;
-
-#ifdef _WIN32_WCE
-	if (ConfMan.hasKey("use_GDI") && ConfMan.getBool("use_GDI")) {
-		SDL_VideoInit("windib", 0);
-		sdlFlags ^= SDL_INIT_VIDEO;
-	}
-#endif
-
-	if (joystick_num > -1)
-		sdlFlags |= SDL_INIT_JOYSTICK;
-
-#if 0
-	// NEW CODE TO HIDE CONSOLE FOR WIN32
-#if defined(WIN32)
-	// console hiding for win32
-	SdlConsoleHidingWin32 consoleHidingWin32;
-	consoleHidingWin32.consoleHandle = 0;
-	consoleHidingWin32.myPid = GetCurrentProcessId();
-	consoleHidingWin32.myTid = GetCurrentThreadId();
-	EnumWindows (initBackendFindConsoleWin32Proc, (LPARAM)&consoleHidingWin32);
-
-	if (!ConfMan.getBool("show_console")) {
-		if (consoleHidingWin32.consoleHandle) {
-			// We won't find a window with our TID/PID in case we were started from command-line
-			ShowWindow(consoleHidingWin32.consoleHandle, SW_HIDE);
-		}
-	}
-#endif
-#endif
-
-	if (SDL_Init(sdlFlags) == -1) {
-		error("Could not initialize SDL: %s", SDL_GetError());
-	}
 
+void OSystem_SDL::init() {
+	// Initialize SDL
+	initSDL();
 
 	if (!_logger)
 		_logger = new Backends::Log::Log(this);
@@ -202,188 +83,139 @@ void OSystem_SDL::initBackend() {
 			_logger->open(logFile);
 	}
 
-	_graphicsMutex = createMutex();
 
-	SDL_ShowCursor(SDL_DISABLE);
+	// Creates the early needed managers, if they don't exist yet
+	// (we check for this to allow subclasses to provide their own).
+	if (_mutexManager == 0)
+		_mutexManager = new SdlMutexManager();
 
-	// Enable unicode support if possible
-	SDL_EnableUNICODE(1);
+	if (_timerManager == 0)
+		_timerManager = new SdlTimerManager();
 
-	memset(&_oldVideoMode, 0, sizeof(_oldVideoMode));
-	memset(&_videoMode, 0, sizeof(_videoMode));
-	memset(&_transactionDetails, 0, sizeof(_transactionDetails));
+	#ifdef USE_OPENGL
+		// Setup a list with both SDL and OpenGL graphics modes
+		setupGraphicsModes();
+	#endif
+}
 
-#if !defined(_WIN32_WCE) && !defined(DINGUX) && !defined(__SYMBIAN32__) && defined(USE_SCALERS)
-	_videoMode.mode = GFX_DOUBLESIZE;
-	_videoMode.scaleFactor = 2;
-	_videoMode.aspectRatioCorrection = ConfMan.getBool("aspect_ratio");
-	_videoMode.desiredAspectRatio = getDesiredAspectRatio();
-	_scalerProc = Normal2x;
-#else // for small screen platforms
-	_videoMode.mode = GFX_NORMAL;
-	_videoMode.scaleFactor = 1;
-	_videoMode.aspectRatioCorrection = false;
-	_scalerProc = Normal1x;
-#endif
-	_scalerType = 0;
+void OSystem_SDL::initBackend() {
+	// Check if backend has not been initialized
+	assert(!_inited);
 
-#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
-	_videoMode.fullscreen = ConfMan.getBool("fullscreen");
-#else
-	_videoMode.fullscreen = true;
-#endif
+	// Create the default event source, in case a custom backend
+	// manager didn't provide one yet.
+	if (_eventSource == 0)
+		_eventSource = new SdlEventSource();
 
-#if !defined(MACOSX) && !defined(__SYMBIAN32__)
-	// Setup a custom program icon.
-	// Don't set icon on OS X, as we use a nicer external icon there.
-	// Don't for Symbian: it uses the EScummVM.aif file for the icon.
-	setupIcon();
-#endif
+	int graphicsManagerType = 0;
 
-	// enable joystick
-	if (joystick_num > -1 && SDL_NumJoysticks() > 0) {
-		printf("Using joystick: %s\n", SDL_JoystickName(0));
-		_joystick = SDL_JoystickOpen(joystick_num);
-	}
+	if (_graphicsManager == 0) {
+#ifdef USE_OPENGL
+		if (ConfMan.hasKey("gfx_mode")) {
+			Common::String gfxMode(ConfMan.get("gfx_mode"));
+			bool use_opengl = false;
+			const OSystem::GraphicsMode *mode = OpenGLSdlGraphicsManager::supportedGraphicsModes();
+			while (mode->name) {
+				if (scumm_stricmp(mode->name, gfxMode.c_str()) == 0)
+					use_opengl = true;
 
+				mode++;
+			}
 
-	// Create the savefile manager, if none exists yet (we check for this to
-	// allow subclasses to provide their own).
-	if (_savefile == 0) {
-#ifdef UNIX
-	_savefile = new POSIXSaveFileManager();
-#else
-	_savefile = new DefaultSaveFileManager();
+			// If the gfx_mode is from OpenGL, create the OpenGL graphics manager
+			if (use_opengl) {
+				_graphicsManager = new OpenGLSdlGraphicsManager();
+				graphicsManagerType = 1;
+			}
+		}
 #endif
+		if (_graphicsManager == 0) {
+			_graphicsManager = new SdlGraphicsManager(_eventSource);
+			graphicsManagerType = 0;
+		}
 	}
 
-	// Create and hook up the mixer, if none exists yet (we check for this to
-	// allow subclasses to provide their own).
-	if (_mixer == 0) {
-		setupMixer();
-	}
-
-	// Create and hook up the timer manager, if none exists yet (we check for
-	// this to allow subclasses to provide their own).
-	if (_timer == 0) {
-		// Note: We could implement a custom SDLTimerManager by using
-		// SDL_AddTimer. That might yield better timer resolution, but it would
-		// also change the semantics of a timer: Right now, ScummVM timers
-		// *never* run in parallel, due to the way they are implemented. If we
-		// switched to SDL_AddTimer, each timer might run in a separate thread.
-		// However, not all our code is prepared for that, so we can't just
-		// switch. Still, it's a potential future change to keep in mind.
-		_timer = new DefaultTimerManager();
-		_timerID = SDL_AddTimer(10, &timer_handler, _timer);
-	}
-
-	// Invoke parent implementation of this method
-	OSystem::initBackend();
-
-	_inited = true;
-}
-
-OSystem_SDL::OSystem_SDL()
-	:
-#ifdef USE_OSD
-	_osdSurface(0), _osdAlpha(SDL_ALPHA_TRANSPARENT), _osdFadeStartTime(0),
-#endif
-	_hwscreen(0), _screen(0), _tmpscreen(0),
-#ifdef USE_RGB_COLOR
-	_screenFormat(Graphics::PixelFormat::createFormatCLUT8()),
-	_cursorFormat(Graphics::PixelFormat::createFormatCLUT8()),
-#endif
-	_overlayVisible(false),
-	_overlayscreen(0), _tmpscreen2(0),
-	_cdrom(0), _scalerProc(0), _modeChanged(false), _screenChangeCount(0),
-	_scrollLock(false),
-	_mouseVisible(false), _mouseNeedsRedraw(false), _mouseData(0), _mouseSurface(0),
-	_mouseOrigSurface(0), _cursorTargetScale(1), _cursorPaletteDisabled(true),
-	_joystick(0),
-	_currentShakePos(0), _newShakePos(0),
-	_paletteDirtyStart(0), _paletteDirtyEnd(0),
-#if MIXER_DOUBLE_BUFFERING
-	_soundMutex(0), _soundCond(0), _soundThread(0),
-	_soundThreadIsRunning(false), _soundThreadShouldQuit(false),
+	// Creates the backend managers, if they don't exist yet (we check
+	// for this to allow subclasses to provide their own).
+	if (_eventManager == 0)
+		_eventManager = new DefaultEventManager(_eventSource);
+
+	// We have to initialize the graphics manager before the event manager
+	// so the virtual keyboard can be initialized, but we have to add the
+	// graphics manager as an event observer after initializing the event
+	// manager.
+	if (graphicsManagerType == 0)
+		((SdlGraphicsManager *)_graphicsManager)->initEventObserver();
+#ifdef USE_OPENGL
+	else if (graphicsManagerType == 1)
+		((OpenGLSdlGraphicsManager *)_graphicsManager)->initEventObserver();
 #endif
-	_fsFactory(0),
-	_savefile(0),
-	_mixer(0),
-	_logger(0),
-	_timer(0),
-	_screenIsLocked(false),
-	_graphicsMutex(0), _transactionMode(kTransactionNone) {
 
-	// clear palette storage
-	memset(_currentPalette, 0, sizeof(_currentPalette));
-	memset(_cursorPalette, 0, sizeof(_cursorPalette));
+	if (_savefileManager == 0)
+		_savefileManager = new DefaultSaveFileManager();
 
-	_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
+	if (_mixerManager == 0) {
+		_mixerManager = new SdlMixerManager();
 
-	// reset mouse state
-	memset(&_km, 0, sizeof(_km));
-	memset(&_mouseCurState, 0, sizeof(_mouseCurState));
+		// Setup and start mixer
+		_mixerManager->init();
+	}
 
-	_inited = false;
+	if (_audiocdManager == 0)
+		_audiocdManager = new SdlAudioCDManager();
 
+	// Setup a custom program icon.
+	setupIcon();
 
-	#if defined(__amigaos4__)
-		_fsFactory = new AmigaOSFilesystemFactory();
-	#elif defined(UNIX)
-		_fsFactory = new POSIXFilesystemFactory();
-	#elif defined(WIN32)
-		_fsFactory = new WindowsFilesystemFactory();
-	#elif defined(__SYMBIAN32__)
-		// Do nothing since its handled by the Symbian SDL inheritance
-	#else
-		#error Unknown and unsupported FS backend
-	#endif
+	_inited = true;
 }
 
-OSystem_SDL::~OSystem_SDL() {
-	SDL_RemoveTimer(_timerID);
-	closeMixer();
+void OSystem_SDL::initSDL() {
+	// Check if SDL has not been initialized
+	if (!_initedSDL) {
+		uint32 sdlFlags = 0;
+		if (ConfMan.hasKey("disable_sdl_parachute"))
+			sdlFlags |= SDL_INIT_NOPARACHUTE;
 
-	free(_mouseData);
+		// Initialize SDL (SDL Subsystems are initiliazed in the corresponding sdl managers)
+		if (SDL_Init(sdlFlags) == -1)
+			error("Could not initialize SDL: %s", SDL_GetError());
 
-	delete _savefile;
-	delete _timer;
-}
-
-uint32 OSystem_SDL::getMillis() {
-	uint32 millis = SDL_GetTicks();
-	g_eventRec.processMillis(millis);
-	return millis;
-}
+		// Enable unicode support if possible
+		SDL_EnableUNICODE(1);
 
-void OSystem_SDL::delayMillis(uint msecs) {
-	SDL_Delay(msecs);
+		_initedSDL = true;
+	}
 }
 
-void OSystem_SDL::getTimeAndDate(TimeDate &td) const {
-	time_t curTime = time(0);
-	struct tm t = *localtime(&curTime);
-	td.tm_sec = t.tm_sec;
-	td.tm_min = t.tm_min;
-	td.tm_hour = t.tm_hour;
-	td.tm_mday = t.tm_mday;
-	td.tm_mon = t.tm_mon;
-	td.tm_year = t.tm_year;
-}
+void OSystem_SDL::deinit() {
+	SDL_ShowCursor(SDL_ENABLE);
 
-Common::TimerManager *OSystem_SDL::getTimerManager() {
-	assert(_timer);
-	return _timer;
-}
+	delete _savefileManager;
+	_savefileManager = 0;
+	delete _graphicsManager;
+	_graphicsManager = 0;
+	delete _eventManager;
+	_eventManager = 0;
+	delete _eventSource;
+	_eventSource = 0;
+	delete _audiocdManager;
+	_audiocdManager = 0;
+	delete _mixerManager;
+	_mixerManager = 0;
+	delete _timerManager;
+	_timerManager = 0;
+	delete _mutexManager;
+	_mutexManager = 0;
+
+#ifdef USE_OPENGL
+	delete[] _graphicsModes;
+#endif
 
-Common::SaveFileManager *OSystem_SDL::getSavefileManager() {
-	assert(_savefile);
-	return _savefile;
-}
+	delete _logger;
+	_logger = 0;
 
-FilesystemFactory *OSystem_SDL::getFilesystemFactory() {
-	assert(_fsFactory);
-	return _fsFactory;
+	SDL_Quit();
 }
 
 void OSystem_SDL::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
@@ -397,88 +229,10 @@ void OSystem_SDL::addSysArchivesToSearchSet(Common::SearchSet &s, int priority)
 	}
 #endif
 
-#ifdef MACOSX
-	// Get URL of the Resource directory of the .app bundle
-	CFURLRef fileUrl = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
-	if (fileUrl) {
-		// Try to convert the URL to an absolute path
-		UInt8 buf[MAXPATHLEN];
-		if (CFURLGetFileSystemRepresentation(fileUrl, true, buf, sizeof(buf))) {
-			// Success: Add it to the search path
-			Common::String bundlePath((const char *)buf);
-			s.add("__OSX_BUNDLE__", new Common::FSDirectory(bundlePath), priority);
-		}
-		CFRelease(fileUrl);
-	}
-
-#endif
-
 }
 
-
-static Common::String getDefaultConfigFileName() {
-	char configFile[MAXPATHLEN];
-#if defined (WIN32) && !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
-	OSVERSIONINFO win32OsVersion;
-	ZeroMemory(&win32OsVersion, sizeof(OSVERSIONINFO));
-	win32OsVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
-	GetVersionEx(&win32OsVersion);
-	// Check for non-9X version of Windows.
-	if (win32OsVersion.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {
-		// Use the Application Data directory of the user profile.
-		if (win32OsVersion.dwMajorVersion >= 5) {
-			if (!GetEnvironmentVariable("APPDATA", configFile, sizeof(configFile)))
-				error("Unable to access application data directory");
-		} else {
-			if (!GetEnvironmentVariable("USERPROFILE", configFile, sizeof(configFile)))
-				error("Unable to access user profile directory");
-
-			strcat(configFile, "\\Application Data");
-			CreateDirectory(configFile, NULL);
-		}
-
-		strcat(configFile, "\\ScummVM");
-		CreateDirectory(configFile, NULL);
-		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
-
-		FILE *tmp = NULL;
-		if ((tmp = fopen(configFile, "r")) == NULL) {
-			// Check windows directory
-			char oldConfigFile[MAXPATHLEN];
-			GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
-			strcat(oldConfigFile, "\\" DEFAULT_CONFIG_FILE);
-			if ((tmp = fopen(oldConfigFile, "r"))) {
-				strcpy(configFile, oldConfigFile);
-
-				fclose(tmp);
-			}
-		} else {
-			fclose(tmp);
-		}
-	} else {
-		// Check windows directory
-		GetWindowsDirectory(configFile, MAXPATHLEN);
-		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
-	}
-#elif defined(UNIX)
-	// On UNIX type systems, by default we store the config file inside
-	// to the HOME directory of the user.
-	//
-	// GP2X is Linux based but Home dir can be read only so do not use
-	// it and put the config in the executable dir.
-	//
-	// On the iPhone, the home dir of the user when you launch the app
-	// from the Springboard, is /. Which we don't want.
-	const char *home = getenv("HOME");
-	if (home != NULL && strlen(home) < MAXPATHLEN)
-		snprintf(configFile, MAXPATHLEN, "%s/%s", home, DEFAULT_CONFIG_FILE);
-	else
-		strcpy(configFile, DEFAULT_CONFIG_FILE);
-#else
-	strcpy(configFile, DEFAULT_CONFIG_FILE);
-#endif
-
-	return configFile;
+Common::String OSystem_SDL::getDefaultConfigFileName() {
+	return "scummvm.ini";
 }
 
 Common::SeekableReadStream *OSystem_SDL::createConfigReadStream() {
@@ -597,84 +351,13 @@ void OSystem_SDL::setWindowCaption(const char *caption) {
 	SDL_WM_SetCaption(cap.c_str(), cap.c_str());
 }
 
-bool OSystem_SDL::hasFeature(Feature f) {
-	return
-		(f == kFeatureFullscreenMode) ||
-		(f == kFeatureAspectRatioCorrection) ||
-		(f == kFeatureCursorHasPalette) ||
-		(f == kFeatureIconifyWindow);
-}
-
-void OSystem_SDL::setFeatureState(Feature f, bool enable) {
-	switch (f) {
-	case kFeatureFullscreenMode:
-		setFullscreenMode(enable);
-		break;
-	case kFeatureAspectRatioCorrection:
-		setAspectRatioCorrection(enable);
-		break;
-	case kFeatureIconifyWindow:
-		if (enable)
-			SDL_WM_IconifyWindow();
-		break;
-	default:
-		break;
-	}
-}
-
-bool OSystem_SDL::getFeatureState(Feature f) {
-	assert (_transactionMode == kTransactionNone);
-
-	switch (f) {
-	case kFeatureFullscreenMode:
-		return _videoMode.fullscreen;
-	case kFeatureAspectRatioCorrection:
-		return _videoMode.aspectRatioCorrection;
-	default:
-		return false;
-	}
-}
-
-void OSystem_SDL::deinit() {
-	if (_cdrom) {
-		SDL_CDStop(_cdrom);
-		SDL_CDClose(_cdrom);
-	}
-	unloadGFXMode();
-	deleteMutex(_graphicsMutex);
-
-	if (_joystick)
-		SDL_JoystickClose(_joystick);
-
-	SDL_ShowCursor(SDL_ENABLE);
-
-	SDL_RemoveTimer(_timerID);
-	closeMixer();
-
-	free(_mouseData);
-
-	delete _timer;
-	delete _logger;
-	_logger = 0;
-
-	SDL_Quit();
-
-	// Event Manager requires save manager for storing
-	// recorded events
-	delete getEventManager();
-	delete _savefile;
-}
-
 void OSystem_SDL::quit() {
 	deinit();
-
-#if !defined(SAMSUNGTV)
 	exit(0);
-#endif
 }
 
 void OSystem_SDL::logMessage(LogMessageType::Type type, const char *message) {
-	BaseBackend::logMessage(type, message);
+	ModularBackend::logMessage(type, message);
 	if (_logger)
 		_logger->print(message);
 
@@ -812,209 +495,128 @@ void OSystem_SDL::setupIcon() {
 	free(icon);
 }
 
-OSystem::MutexRef OSystem_SDL::createMutex() {
-	return (MutexRef) SDL_CreateMutex();
-}
-
-void OSystem_SDL::lockMutex(MutexRef mutex) {
-	SDL_mutexP((SDL_mutex *) mutex);
+uint32 OSystem_SDL::getMillis() {
+	uint32 millis = SDL_GetTicks();
+	g_eventRec.processMillis(millis);
+	return millis;
 }
 
-void OSystem_SDL::unlockMutex(MutexRef mutex) {
-	SDL_mutexV((SDL_mutex *) mutex);
+void OSystem_SDL::delayMillis(uint msecs) {
+	SDL_Delay(msecs);
 }
 
-void OSystem_SDL::deleteMutex(MutexRef mutex) {
-	SDL_DestroyMutex((SDL_mutex *) mutex);
+void OSystem_SDL::getTimeAndDate(TimeDate &td) const {
+	time_t curTime = time(0);
+	struct tm t = *localtime(&curTime);
+	td.tm_sec = t.tm_sec;
+	td.tm_min = t.tm_min;
+	td.tm_hour = t.tm_hour;
+	td.tm_mday = t.tm_mday;
+	td.tm_mon = t.tm_mon;
+	td.tm_year = t.tm_year;
 }
 
-#pragma mark -
-#pragma mark --- Audio ---
-#pragma mark -
-
-#if MIXER_DOUBLE_BUFFERING
-
-void OSystem_SDL::mixerProducerThread() {
-	byte nextSoundBuffer;
-
-	SDL_LockMutex(_soundMutex);
-	while (true) {
-		// Wait till we are allowed to produce data
-		SDL_CondWait(_soundCond, _soundMutex);
-
-		if (_soundThreadShouldQuit)
-			break;
-
-		// Generate samples and put them into the next buffer
-		nextSoundBuffer = _activeSoundBuf ^ 1;
-		_mixer->mixCallback(_soundBuffers[nextSoundBuffer], _soundBufSize);
-
-		// Swap buffers
-		_activeSoundBuf = nextSoundBuffer;
-	}
-	SDL_UnlockMutex(_soundMutex);
+Audio::Mixer *OSystem_SDL::getMixer() {
+	assert(_mixerManager);
+	return _mixerManager->getMixer();
 }
 
-int SDLCALL OSystem_SDL::mixerProducerThreadEntry(void *arg) {
-	OSystem_SDL *this_ = (OSystem_SDL *)arg;
-	assert(this_);
-	this_->mixerProducerThread();
-	return 0;
+SdlMixerManager *OSystem_SDL::getMixerManager() {
+	assert(_mixerManager);
+	return _mixerManager;
 }
 
+#ifdef USE_OPENGL
 
-void OSystem_SDL::initThreadedMixer(Audio::MixerImpl *mixer, uint bufSize) {
-	_soundThreadIsRunning = false;
-	_soundThreadShouldQuit = false;
-
-	// Create mutex and condition variable
-	_soundMutex = SDL_CreateMutex();
-	_soundCond = SDL_CreateCond();
-
-	// Create two sound buffers
-	_activeSoundBuf = 0;
-	_soundBufSize = bufSize;
-	_soundBuffers[0] = (byte *)calloc(1, bufSize);
-	_soundBuffers[1] = (byte *)calloc(1, bufSize);
-
-	_soundThreadIsRunning = true;
-
-	// Finally start the thread
-	_soundThread = SDL_CreateThread(mixerProducerThreadEntry, this);
+const OSystem::GraphicsMode *OSystem_SDL::getSupportedGraphicsModes() const {
+	return _graphicsModes;
 }
 
-void OSystem_SDL::deinitThreadedMixer() {
-	// Kill thread?? _soundThread
-
-	if (_soundThreadIsRunning) {
-		// Signal the producer thread to end, and wait for it to actually finish.
-		_soundThreadShouldQuit = true;
-		SDL_CondBroadcast(_soundCond);
-		SDL_WaitThread(_soundThread, NULL);
-
-		// Kill the mutex & cond variables.
-		// Attention: AT this point, the mixer callback must not be running
-		// anymore, else we will crash!
-		SDL_DestroyMutex(_soundMutex);
-		SDL_DestroyCond(_soundCond);
-
-		_soundThreadIsRunning = false;
-
-		free(_soundBuffers[0]);
-		free(_soundBuffers[1]);
-	}
+int OSystem_SDL::getDefaultGraphicsMode() const {
+	// Return the default graphics mode from the current graphics manager
+	if (_graphicsMode < _sdlModesCount)
+		return _graphicsManager->getDefaultGraphicsMode();
+	else
+		return _graphicsManager->getDefaultGraphicsMode() + _sdlModesCount;
 }
 
-
-void OSystem_SDL::mixCallback(void *arg, byte *samples, int len) {
-	OSystem_SDL *this_ = (OSystem_SDL *)arg;
-	assert(this_);
-	assert(this_->_mixer);
-
-	assert((int)this_->_soundBufSize == len);
-
-	// Lock mutex, to ensure our data is not overwritten by the producer thread
-	SDL_LockMutex(this_->_soundMutex);
-
-	// Copy data from the current sound buffer
-	memcpy(samples, this_->_soundBuffers[this_->_activeSoundBuf], len);
-
-	// Unlock mutex and wake up the produced thread
-	SDL_UnlockMutex(this_->_soundMutex);
-	SDL_CondSignal(this_->_soundCond);
+bool OSystem_SDL::setGraphicsMode(int mode) {
+	const OSystem::GraphicsMode *srcMode;
+	int i;
+	// Check if mode is from SDL or OpenGL
+	if (mode < _sdlModesCount) {
+		srcMode = SdlGraphicsManager::supportedGraphicsModes();
+		i = 0;
+	} else {
+		srcMode = OpenGLSdlGraphicsManager::supportedGraphicsModes();
+		i = _sdlModesCount;
+	}
+	// Loop through modes
+	while (srcMode->name) {
+		if (i == mode) {
+			// If the new mode and the current mode are not from the same graphics
+			// manager, delete and create the new mode graphics manager
+			if (_graphicsMode >= _sdlModesCount && mode < _sdlModesCount) {
+				delete _graphicsManager;
+				_graphicsManager = new SdlGraphicsManager(_eventSource);
+				((SdlGraphicsManager *)_graphicsManager)->initEventObserver();
+				_graphicsManager->beginGFXTransaction();
+			} else if (_graphicsMode < _sdlModesCount && mode >= _sdlModesCount) {
+				delete _graphicsManager;
+				_graphicsManager = new OpenGLSdlGraphicsManager();
+				((OpenGLSdlGraphicsManager *)_graphicsManager)->initEventObserver();
+				_graphicsManager->beginGFXTransaction();
+			}
+			_graphicsMode = mode;
+			return _graphicsManager->setGraphicsMode(srcMode->id);
+		}
+		i++;
+		srcMode++;
+	}
+	return false;
 }
 
-#else
-
-void OSystem_SDL::mixCallback(void *sys, byte *samples, int len) {
-	OSystem_SDL *this_ = (OSystem_SDL *)sys;
-	assert(this_);
-	assert(this_->_mixer);
-
-	this_->_mixer->mixCallback(samples, len);
+int OSystem_SDL::getGraphicsMode() const {
+	return _graphicsMode;
 }
 
-#endif
-
-void OSystem_SDL::setupMixer() {
-	SDL_AudioSpec desired;
-
-	// Determine the desired output sampling frequency.
-	uint32 samplesPerSec = 0;
-	if (ConfMan.hasKey("output_rate"))
-		samplesPerSec = ConfMan.getInt("output_rate");
-	if (samplesPerSec <= 0)
-		samplesPerSec = SAMPLES_PER_SEC;
-
-	// Determine the sample buffer size. We want it to store enough data for
-	// at least 1/16th of a second (though at most 8192 samples). Note
-	// that it must be a power of two. So e.g. at 22050 Hz, we request a
-	// sample buffer size of 2048.
-	uint32 samples = 8192;
-	while (samples * 16 > samplesPerSec * 2)
-		samples >>= 1;
-
-	memset(&desired, 0, sizeof(desired));
-	desired.freq = samplesPerSec;
-	desired.format = AUDIO_S16SYS;
-	desired.channels = 2;
-	desired.samples = (uint16)samples;
-	desired.callback = mixCallback;
-	desired.userdata = this;
-
-	assert(!_mixer);
-	if (SDL_OpenAudio(&desired, &_obtainedRate) != 0) {
-		warning("Could not open audio device: %s", SDL_GetError());
-		_mixer = new Audio::MixerImpl(this, samplesPerSec);
-		assert(_mixer);
-		_mixer->setReady(false);
-	} else {
-		// Note: This should be the obtained output rate, but it seems that at
-		// least on some platforms SDL will lie and claim it did get the rate
-		// even if it didn't. Probably only happens for "weird" rates, though.
-		samplesPerSec = _obtainedRate.freq;
-		debug(1, "Output sample rate: %d Hz", samplesPerSec);
-
-		// Create the mixer instance and start the sound processing
-		_mixer = new Audio::MixerImpl(this, samplesPerSec);
-		assert(_mixer);
-		_mixer->setReady(true);
-
-#if MIXER_DOUBLE_BUFFERING
-		initThreadedMixer(_mixer, _obtainedRate.samples * 4);
-#endif
+void OSystem_SDL::setupGraphicsModes() {
+	const OSystem::GraphicsMode *sdlGraphicsModes = SdlGraphicsManager::supportedGraphicsModes();
+	const OSystem::GraphicsMode *openglGraphicsModes = OpenGLSdlGraphicsManager::supportedGraphicsModes();
+	_sdlModesCount = 0;
+	_glModesCount = 0;
 
-		// start the sound system
-		SDL_PauseAudio(0);
+	// Count the number of graphics modes
+	const OSystem::GraphicsMode *srcMode = sdlGraphicsModes;
+	while (srcMode->name) {
+		_sdlModesCount++;
+		srcMode++;
+	}
+	srcMode = openglGraphicsModes;
+	while (srcMode->name) {
+		_glModesCount++;
+		srcMode++;
 	}
-}
 
-void OSystem_SDL::closeMixer() {
-	if (_mixer)
-		_mixer->setReady(false);
+	// Allocate enough space for merged array of modes
+	_graphicsModes = new OSystem::GraphicsMode[_glModesCount  + _sdlModesCount + 1];
 
-	SDL_CloseAudio();
+	// Copy SDL graphics modes
+	memcpy((void *)_graphicsModes, sdlGraphicsModes, _sdlModesCount * sizeof(OSystem::GraphicsMode));
 
-	delete _mixer;
-	_mixer = 0;
+	// Copy OpenGL graphics modes
+	memcpy((void *)(_graphicsModes + _sdlModesCount), openglGraphicsModes, _glModesCount  * sizeof(OSystem::GraphicsMode));
 
-#if MIXER_DOUBLE_BUFFERING
-	deinitThreadedMixer();
-#endif
+	// Set a null mode at the end
+	memset((void *)(_graphicsModes + _sdlModesCount + _glModesCount), 0, sizeof(OSystem::GraphicsMode));
 
+	// Set new internal ids for all modes
+	int i = 0;
+	OSystem::GraphicsMode *mode = _graphicsModes;
+	while (mode->name) {
+		mode->id = i++;
+		mode++;
+	}
 }
 
-Audio::Mixer *OSystem_SDL::getMixer() {
-	assert(_mixer);
-	return _mixer;
-}
-
-#pragma mark -
-#pragma mark --- CD Audio ---
-#pragma mark -
-
-AudioCDManager *OSystem_SDL::getAudioCDManager() {
-	if (!_audiocdManager)
-		_audiocdManager = new SdlAudioCDManager();
-	return _audiocdManager;
-}
+#endif
diff --git a/backends/platform/sdl/sdl.h b/backends/platform/sdl/sdl.h
index 48797ab238..9a69bed691 100644
--- a/backends/platform/sdl/sdl.h
+++ b/backends/platform/sdl/sdl.h
@@ -23,8 +23,8 @@
  *
  */
 
-#ifndef SDL_COMMON_H
-#define SDL_COMMON_H
+#ifndef PLATFORM_SDL_H
+#define PLATFORM_SDL_H
 
 #if defined(__SYMBIAN32__)
 #include <esdl\SDL.h>
@@ -32,461 +32,110 @@
 #include <SDL.h>
 #endif
 
-#include "backends/base-backend.h"
+#include "backends/modular-backend.h"
+#include "backends/mixer/sdl/sdl-mixer.h"
+#include "backends/events/sdl/sdl-events.h"
 #include "backends/log/log.h"
-#include "graphics/scaler.h"
 
-
-namespace Audio {
-	class MixerImpl;
-}
-
-#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
-// Uncomment this to enable the 'on screen display' code.
-#define USE_OSD	1
-#endif
-
-#if defined(MACOSX)
-// On Mac OS X, we need to double buffer the audio buffer, else anything
-// which produces sampled data with high latency (like the MT-32 emulator)
-// will sound terribly.
-// This could be enabled for more / most ports in the future, but needs some
-// testing.
-#define MIXER_DOUBLE_BUFFERING 1
-#endif
-
-
-enum {
-	GFX_NORMAL = 0,
-	GFX_DOUBLESIZE = 1,
-	GFX_TRIPLESIZE = 2,
-	GFX_2XSAI = 3,
-	GFX_SUPER2XSAI = 4,
-	GFX_SUPEREAGLE = 5,
-	GFX_ADVMAME2X = 6,
-	GFX_ADVMAME3X = 7,
-	GFX_HQ2X = 8,
-	GFX_HQ3X = 9,
-	GFX_TV2X = 10,
-	GFX_DOTMATRIX = 11
-};
-
-class AspectRatio {
-	int _kw, _kh;
-public:
-	AspectRatio() { _kw = _kh = 0; }
-	AspectRatio(int w, int h);
-
-	bool isAuto() const { return (_kw | _kh) == 0; }
-
-	int kw() const { return _kw; }
-	int kh() const { return _kh; }
-};
-
-
-class OSystem_SDL : public BaseBackend {
+/** 
+ * Base OSystem class for all SDL ports.
+ */
+class OSystem_SDL : public ModularBackend {
 public:
 	OSystem_SDL();
 	virtual ~OSystem_SDL();
 
-	virtual void initBackend();
-
-	void beginGFXTransaction();
-	TransactionError endGFXTransaction();
-
-#ifdef USE_RGB_COLOR
-	// Game screen
-	virtual Graphics::PixelFormat getScreenFormat() const { return _screenFormat; }
-
-	// Highest supported
-	virtual Common::List<Graphics::PixelFormat> getSupportedFormats() const;
-#endif
-
-	// Set the size and format of the video bitmap.
-	// Typically, 320x200 CLUT8
-	virtual void initSize(uint w, uint h, const Graphics::PixelFormat *format); // overloaded by CE backend
-
-	virtual int getScreenChangeID() const { return _screenChangeCount; }
-
-	// Set colors of the palette
-	void setPalette(const byte *colors, uint start, uint num);
-
-	// Get colors of the palette
-	void grabPalette(byte *colors, uint start, uint num);
-
-	// Draw a bitmap to screen.
-	// The screen will not be updated to reflect the new bitmap
-	virtual void copyRectToScreen(const byte *src, int pitch, int x, int y, int w, int h); // overloaded by CE backend (FIXME)
-
-	virtual Graphics::Surface *lockScreen();
-	virtual void unlockScreen();
-
-	// Update the dirty areas of the screen
-	void updateScreen();
-
-	// Either show or hide the mouse cursor
-	bool showMouse(bool visible);
-
-	// Warp the mouse cursor. Where set_mouse_pos() only informs the
-	// backend of the mouse cursor's current position, this function
-	// actually moves the cursor to the specified position.
-	virtual void warpMouse(int x, int y); // overloaded by CE backend (FIXME)
-
-	// Set the bitmap that's used when drawing the cursor.
-	virtual void setMouseCursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y, uint32 keycolor, int cursorTargetScale, const Graphics::PixelFormat *format); // overloaded by CE backend (FIXME)
-
-	// Set colors of cursor palette
-	void setCursorPalette(const byte *colors, uint start, uint num);
-
-	// Disables or enables cursor palette
-	void disableCursorPalette(bool disable) {
-		_cursorPaletteDisabled = disable;
-		blitCursor();
-	}
-
-	// Shaking is used in SCUMM. Set current shake position.
-	void setShakePos(int shake_pos);
-
-	// Get the number of milliseconds since the program was started.
-	uint32 getMillis();
-
-	// Delay for a specified amount of milliseconds
-	void delayMillis(uint msecs);
-
-	// Get the next event.
-	// Returns true if an event was retrieved.
-	virtual bool pollEvent(Common::Event &event); // overloaded by CE backend
-
-protected:
-	virtual bool dispatchSDLEvent(SDL_Event &ev, Common::Event &event);
-
-	// Handlers for specific SDL events, called by pollEvent.
-	// This way, if a backend inherits fromt the SDL backend, it can
-	// change the behavior of only a single event, without having to override all
-	// of pollEvent.
-	virtual bool handleKeyDown(SDL_Event &ev, Common::Event &event);
-	virtual bool handleKeyUp(SDL_Event &ev, Common::Event &event);
-	virtual bool handleMouseMotion(SDL_Event &ev, Common::Event &event);
-	virtual bool handleMouseButtonDown(SDL_Event &ev, Common::Event &event);
-	virtual bool handleMouseButtonUp(SDL_Event &ev, Common::Event &event);
-	virtual bool handleJoyButtonDown(SDL_Event &ev, Common::Event &event);
-	virtual bool handleJoyButtonUp(SDL_Event &ev, Common::Event &event);
-	virtual bool handleJoyAxisMotion(SDL_Event &ev, Common::Event &event);
-
-public:
+	/** 
+	 * Pre-initialize backend. It should be called after
+	 * instantiating the backend. Early needed managers are
+	 * created here.
+	 */
+	virtual void init();
 
+	/**
+	 * Get the Mixer Manager instance. Not to confuse with getMixer(),
+	 * that returns Audio::Mixer. The Mixer Manager is a SDL wrapper class
+	 * for the Audio::Mixer. Used by other managers.
+	 */
+	virtual SdlMixerManager *getMixerManager();
 
-	// Define all hardware keys for keymapper
+	// Override functions from ModularBackend and OSystem
+	virtual void initBackend();
 	virtual Common::HardwareKeySet *getHardwareKeySet();
-
-	// Set function that generates samples
-	virtual void setupMixer();
-	static void mixCallback(void *s, byte *samples, int len);
-
-	virtual void closeMixer();
-
-	virtual Audio::Mixer *getMixer();
-
-	virtual AudioCDManager *getAudioCDManager();
-
-	// Quit
-	virtual void quit(); // overloaded by CE backend
+	virtual void quit();
+	virtual void deinit();
 
 	// Logging
 	virtual void logMessage(LogMessageType::Type type, const char *message);
 
 	virtual Common::String getSystemLanguage() const;
 
-	void deinit();
-
-	virtual void getTimeAndDate(TimeDate &t) const;
-	virtual Common::TimerManager *getTimerManager();
-
-	// Mutex handling
-	MutexRef createMutex();
-	void lockMutex(MutexRef mutex);
-	void unlockMutex(MutexRef mutex);
-	void deleteMutex(MutexRef mutex);
-
-	// Overlay
-	virtual Graphics::PixelFormat getOverlayFormat() const { return _overlayFormat; }
-
-	virtual void showOverlay();
-	virtual void hideOverlay();
-	virtual void clearOverlay();
-	virtual void grabOverlay(OverlayColor *buf, int pitch);
-	virtual void copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h);
-	virtual int16 getHeight();
-	virtual int16 getWidth();
-	virtual int16 getOverlayHeight()  { return _videoMode.overlayHeight; }
-	virtual int16 getOverlayWidth()   { return _videoMode.overlayWidth; }
-
-	virtual const GraphicsMode *getSupportedGraphicsModes() const;
-	virtual int getDefaultGraphicsMode() const;
-	virtual bool setGraphicsMode(int mode);
-	virtual int getGraphicsMode() const;
-
 	virtual void setWindowCaption(const char *caption);
-
-	virtual bool hasFeature(Feature f);
-	virtual void setFeatureState(Feature f, bool enable);
-	virtual bool getFeatureState(Feature f);
-	virtual void preprocessEvents(SDL_Event *event) {}
-
-#ifdef USE_OSD
-	void displayMessageOnOSD(const char *msg);
-#endif
-
-	virtual Common::SaveFileManager *getSavefileManager();
-	virtual FilesystemFactory *getFilesystemFactory();
 	virtual void addSysArchivesToSearchSet(Common::SearchSet &s, int priority = 0);
-
 	virtual Common::SeekableReadStream *createConfigReadStream();
 	virtual Common::WriteStream *createConfigWriteStream();
+	virtual uint32 getMillis();
+	virtual void delayMillis(uint msecs);
+	virtual void getTimeAndDate(TimeDate &td) const;
+	virtual Audio::Mixer *getMixer();
 
-protected:
-	bool _inited;
-	SDL_AudioSpec _obtainedRate;
-
-#ifdef USE_OSD
-	SDL_Surface *_osdSurface;
-	Uint8 _osdAlpha;			// Transparency level of the OSD
-	uint32 _osdFadeStartTime;	// When to start the fade out
-	enum {
-		kOSDFadeOutDelay = 2 * 1000,	// Delay before the OSD is faded out (in milliseconds)
-		kOSDFadeOutDuration = 500,		// Duration of the OSD fade out (in milliseconds)
-		kOSDColorKey = 1,
-		kOSDInitialAlpha = 80			// Initial alpha level, in percent
+	// HACK: Special SDL events types
+	enum SdlEvent {
+		kSdlEventExpose = 100,
+		kSdlEventResize = 101
 	};
-#endif
-
-	// hardware screen
-	SDL_Surface *_hwscreen;
 
-	// unseen game screen
-	SDL_Surface *_screen;
-#ifdef USE_RGB_COLOR
-	Graphics::PixelFormat _screenFormat;
-	Graphics::PixelFormat _cursorFormat;
-	Common::List<Graphics::PixelFormat> _supportedFormats;
+protected:
+	bool _inited;
+	bool _initedSDL;
 
 	/**
-	 * Update the list of supported pixel formats.
-	 * This method is invoked by loadGFXMode().
+	 * Mixer manager that configures and setups SDL for
+	 * the wrapped Audio::Mixer, the true mixer.
 	 */
-	void detectSupportedFormats();
-#endif
-
-	// temporary screen (for scalers)
-	SDL_Surface *_tmpscreen;
-	SDL_Surface *_tmpscreen2;
-
-	// overlay
-	SDL_Surface *_overlayscreen;
-	bool _overlayVisible;
-	Graphics::PixelFormat _overlayFormat;
-
-	// CD Audio
-	SDL_CD *_cdrom;
-	int _cdTrack, _cdNumLoops, _cdStartFrame, _cdDuration;
-	uint32 _cdEndTime, _cdStopTime;
-
-	enum {
-		kTransactionNone = 0,
-		kTransactionActive = 1,
-		kTransactionRollback = 2
-	};
-
-	struct TransactionDetails {
-		bool sizeChanged;
-		bool needHotswap;
-		bool needUpdatescreen;
-		bool normal1xScaler;
-#ifdef USE_RGB_COLOR
-		bool formatChanged;
-#endif
-	};
-	TransactionDetails _transactionDetails;
-
-	struct VideoState {
-		bool setup;
-
-		bool fullscreen;
-		bool aspectRatioCorrection;
-		AspectRatio desiredAspectRatio;
-
-		int mode;
-		int scaleFactor;
-
-		int screenWidth, screenHeight;
-		int overlayWidth, overlayHeight;
-		int hardwareWidth, hardwareHeight;
-#ifdef USE_RGB_COLOR
-		Graphics::PixelFormat format;
-#endif
-	};
-	VideoState _videoMode, _oldVideoMode;
-
-	virtual void setGraphicsModeIntern(); // overloaded by CE backend
-
-	/** Force full redraw on next updateScreen */
-	bool _forceFull;
-	ScalerProc *_scalerProc;
-	int _scalerType;
-	int _transactionMode;
-
-	bool _screenIsLocked;
-	Graphics::Surface _framebuffer;
-
-	/** Current video mode flags (see DF_* constants) */
-	bool _modeChanged;
-	int _screenChangeCount;
-
-	enum {
-		NUM_DIRTY_RECT = 100,
-		MAX_SCALING = 3
-	};
-
-	// Dirty rect management
-	SDL_Rect _dirtyRectList[NUM_DIRTY_RECT];
-	int _numDirtyRects;
-
-	// Keyboard mouse emulation.  Disabled by fingolfin 2004-12-18.
-	// I am keeping the rest of the code in for now, since the joystick
-	// code (or rather, "hack") uses it, too.
-	struct KbdMouse {
-		int16 x, y, x_vel, y_vel, x_max, y_max, x_down_count, y_down_count;
-		uint32 last_time, delay_time, x_down_time, y_down_time;
-	};
-
-	struct MousePos {
-		// The mouse position, using either virtual (game) or real
-		// (overlay) coordinates.
-		int16 x, y;
-
-		// The size and hotspot of the original cursor image.
-		int16 w, h;
-		int16 hotX, hotY;
-
-		// The size and hotspot of the pre-scaled cursor image, in real
-		// coordinates.
-		int16 rW, rH;
-		int16 rHotX, rHotY;
-
-		// The size and hotspot of the pre-scaled cursor image, in game
-		// coordinates.
-		int16 vW, vH;
-		int16 vHotX, vHotY;
-
-		MousePos() : x(0), y(0), w(0), h(0), hotX(0), hotY(0),
-		             rW(0), rH(0), rHotX(0), rHotY(0), vW(0), vH(0),
-		             vHotX(0), vHotY(0)
-			{ }
-	};
-
-	// mouse
-	KbdMouse _km;
-	bool _mouseVisible;
-	bool _mouseNeedsRedraw;
-	byte *_mouseData;
-	SDL_Rect _mouseBackup;
-	MousePos _mouseCurState;
-#ifdef USE_RGB_COLOR
-	uint32 _mouseKeyColor;
-#else
-	byte _mouseKeyColor;
-#endif
-	int _cursorTargetScale;
-	bool _cursorPaletteDisabled;
-	SDL_Surface *_mouseOrigSurface;
-	SDL_Surface *_mouseSurface;
-	enum {
-		kMouseColorKey = 1
-	};
-
-	// Scroll lock state - since SDL doesn't track it
-	bool _scrollLock;
-
-	// joystick
-	SDL_Joystick *_joystick;
-
-	// Shake mode
-	int _currentShakePos;
-	int _newShakePos;
-
-	// Palette data
-	SDL_Color _currentPalette[256];
-	uint _paletteDirtyStart, _paletteDirtyEnd;
-
-	// Cursor palette data
-	SDL_Color _cursorPalette[256];
+	SdlMixerManager *_mixerManager;
 
 	/**
-	 * Mutex which prevents multiple threads from interfering with each other
-	 * when accessing the screen.
+	 * The event source we use for obtaining SDL events.
 	 */
-	MutexRef _graphicsMutex;
-
-#ifdef MIXER_DOUBLE_BUFFERING
-	SDL_mutex *_soundMutex;
-	SDL_cond *_soundCond;
-	SDL_Thread *_soundThread;
-	bool _soundThreadIsRunning;
-	bool _soundThreadShouldQuit;
+	SdlEventSource *_eventSource;
 
-	byte _activeSoundBuf;
-	uint _soundBufSize;
-	byte *_soundBuffers[2];
+	/**
+	 * Initialze the SDL library.
+	 */
+	virtual void initSDL();
 
-	void mixerProducerThread();
-	static int SDLCALL mixerProducerThreadEntry(void *arg);
-	void initThreadedMixer(Audio::MixerImpl *mixer, uint bufSize);
-	void deinitThreadedMixer();
-#endif
+	/**
+	 * Setup the window icon.
+	 */
+	virtual void setupIcon();
 
-	FilesystemFactory *_fsFactory;
-	Common::SaveFileManager *_savefile;
-	Audio::MixerImpl *_mixer;
+	/**
+	 * Get the file path where the user configuration
+	 * of ScummVM will be saved.
+	 */
+	virtual Common::String getDefaultConfigFileName();
 
 	// Logging
 	virtual Common::WriteStream *createLogFile();
 	Backends::Log::Log *_logger;
 
-	SDL_TimerID _timerID;
-	Common::TimerManager *_timer;
-
-protected:
-	virtual void addDirtyRect(int x, int y, int w, int h, bool realCoordinates = false); // overloaded by CE backend
-
-	virtual void drawMouse(); // overloaded by CE backend
-	virtual void undrawMouse(); // overloaded by CE backend (FIXME)
-	virtual void blitCursor(); // overloaded by CE backend (FIXME)
-
-	/** Set the position of the virtual mouse cursor. */
-	void setMousePos(int x, int y);
-	virtual void fillMouseEvent(Common::Event &event, int x, int y); // overloaded by CE backend
-	void toggleMouseGrab();
-
-	virtual void internUpdateScreen(); // overloaded by CE backend
-
-	virtual bool loadGFXMode(); // overloaded by CE backend
-	virtual void unloadGFXMode(); // overloaded by CE backend
-	virtual bool hotswapGFXMode(); // overloaded by CE backend
-
-	void setFullscreenMode(bool enable);
-	void setAspectRatioCorrection(bool enable);
-
-	virtual bool saveScreenshot(const char *filename); // overloaded by CE backend
+#ifdef USE_OPENGL
+	OSystem::GraphicsMode *_graphicsModes;
+	int _graphicsMode;
+	int _sdlModesCount;
+	int _glModesCount;
 
-	int effectiveScreenHeight() const;
-
-	void setupIcon();
-	void handleKbdMouse();
-
-	virtual bool remapKey(SDL_Event &ev, Common::Event &event);
+	/**
+	 * Creates the merged graphics modes list
+	 */
+	virtual void setupGraphicsModes();
 
-	bool handleScalerHotkeys(const SDL_KeyboardEvent &key);
-	bool isScalerHotkey(const Common::Event &event);
+	virtual const OSystem::GraphicsMode *getSupportedGraphicsModes() const;
+	virtual int getDefaultGraphicsMode() const;
+	virtual bool setGraphicsMode(int mode);
+	virtual int getGraphicsMode() const;
+#endif
 };
 
 #endif
diff --git a/backends/platform/sdl/win32/win32-main.cpp b/backends/platform/sdl/win32/win32-main.cpp
new file mode 100644
index 0000000000..25f208ddac
--- /dev/null
+++ b/backends/platform/sdl/win32/win32-main.cpp
@@ -0,0 +1,66 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef WIN32
+
+// Fix for bug #2895217 "MSVC compilation broken with r47595":
+// We need to keep this on top of the "common/scummsys.h"(base/main.h) include,
+// otherwise we will get errors about the windows headers redefining
+// "ARRAYSIZE" for example.
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef ARRAYSIZE // winnt.h defines ARRAYSIZE, but we want our own one...
+
+#include "backends/platform/sdl/win32/win32.h"
+#include "backends/plugins/sdl/sdl-provider.h"
+#include "base/main.h"
+
+int __stdcall WinMain(HINSTANCE /*hInst*/, HINSTANCE /*hPrevInst*/,  LPSTR /*lpCmdLine*/, int /*iShowCmd*/) {
+	SDL_SetModuleHandle(GetModuleHandle(NULL));
+	return main(__argc, __argv);
+}
+
+int main(int argc, char *argv[]) {
+	// Create our OSystem instance
+	g_system = new OSystem_Win32();
+	assert(g_system);
+
+	// Pre initialize the backend
+	((OSystem_Win32 *)g_system)->init();
+
+#ifdef DYNAMIC_MODULES
+	PluginManager::instance().addPluginProvider(new SDLPluginProvider());
+#endif
+
+	// Invoke the actual ScummVM main entry point:
+	int res = scummvm_main(argc, argv);
+
+	// Free OSystem
+	delete (OSystem_Win32 *)g_system;
+
+	return res;
+}
+
+#endif
diff --git a/backends/platform/sdl/win32/win32.cpp b/backends/platform/sdl/win32/win32.cpp
new file mode 100644
index 0000000000..68047fdde1
--- /dev/null
+++ b/backends/platform/sdl/win32/win32.cpp
@@ -0,0 +1,132 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef WIN32
+
+#include <windows.h>
+#define WIN32_LEAN_AND_MEAN
+#undef ARRAYSIZE // winnt.h defines ARRAYSIZE, but we want our own one...
+
+#include "backends/platform/sdl/win32/win32.h"
+#include "backends/fs/windows/windows-fs-factory.h"
+
+#define DEFAULT_CONFIG_FILE "scummvm.ini"
+
+//#define	HIDE_CONSOLE
+
+#ifdef HIDE_CONSOLE
+struct SdlConsoleHidingWin32 {
+	DWORD myPid;
+	DWORD myTid;
+	HWND consoleHandle;
+};
+
+// console hiding for win32
+static BOOL CALLBACK initBackendFindConsoleWin32Proc(HWND hWnd, LPARAM lParam) {
+	DWORD pid, tid;
+	SdlConsoleHidingWin32 *variables = (SdlConsoleHidingWin32 *)lParam;
+	tid = GetWindowThreadProcessId(hWnd, &pid);
+	if ((tid == variables->myTid) && (pid == variables->myPid)) {
+		variables->consoleHandle = hWnd;
+		return FALSE;
+	}
+	return TRUE;
+}
+
+#endif
+
+void OSystem_Win32::init() {
+#ifdef HIDE_CONSOLE
+	// console hiding for win32
+	SdlConsoleHidingWin32 consoleHidingWin32;
+	consoleHidingWin32.consoleHandle = 0;
+	consoleHidingWin32.myPid = GetCurrentProcessId();
+	consoleHidingWin32.myTid = GetCurrentThreadId();
+	EnumWindows (initBackendFindConsoleWin32Proc, (LPARAM)&consoleHidingWin32);
+
+	if (!ConfMan.getBool("show_console")) {
+		if (consoleHidingWin32.consoleHandle) {
+			// We won't find a window with our TID/PID in case we were started from command-line
+			ShowWindow(consoleHidingWin32.consoleHandle, SW_HIDE);
+		}
+	}
+#endif
+
+	// Initialze File System Factory
+	_fsFactory = new WindowsFilesystemFactory();
+
+	// Invoke parent implementation of this method
+	OSystem_SDL::init();
+}
+
+Common::String OSystem_Win32::getDefaultConfigFileName() {
+	char configFile[MAXPATHLEN];
+
+	OSVERSIONINFO win32OsVersion;
+	ZeroMemory(&win32OsVersion, sizeof(OSVERSIONINFO));
+	win32OsVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+	GetVersionEx(&win32OsVersion);
+	// Check for non-9X version of Windows.
+	if (win32OsVersion.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {
+		// Use the Application Data directory of the user profile.
+		if (win32OsVersion.dwMajorVersion >= 5) {
+			if (!GetEnvironmentVariable("APPDATA", configFile, sizeof(configFile)))
+				error("Unable to access application data directory");
+		} else {
+			if (!GetEnvironmentVariable("USERPROFILE", configFile, sizeof(configFile)))
+				error("Unable to access user profile directory");
+
+			strcat(configFile, "\\Application Data");
+			CreateDirectory(configFile, NULL);
+		}
+
+		strcat(configFile, "\\ScummVM");
+		CreateDirectory(configFile, NULL);
+		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
+
+		FILE *tmp = NULL;
+		if ((tmp = fopen(configFile, "r")) == NULL) {
+			// Check windows directory
+			char oldConfigFile[MAXPATHLEN];
+			GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
+			strcat(oldConfigFile, "\\" DEFAULT_CONFIG_FILE);
+			if ((tmp = fopen(oldConfigFile, "r"))) {
+				strcpy(configFile, oldConfigFile);
+
+				fclose(tmp);
+			}
+		} else {
+			fclose(tmp);
+		}
+	} else {
+		// Check windows directory
+		GetWindowsDirectory(configFile, MAXPATHLEN);
+		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
+	}
+
+	return configFile;
+}
+
+#endif
diff --git a/backends/platform/sdl/win32/win32.h b/backends/platform/sdl/win32/win32.h
new file mode 100644
index 0000000000..f18ee6ead1
--- /dev/null
+++ b/backends/platform/sdl/win32/win32.h
@@ -0,0 +1,39 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef PLATFORM_SDL_WIN32_H
+#define PLATFORM_SDL_WIN32_H
+
+#include "backends/platform/sdl/sdl.h"
+
+class OSystem_Win32 : public OSystem_SDL {
+public:
+	virtual void init();
+
+protected:
+	virtual Common::String getDefaultConfigFileName();
+};
+
+#endif