Modularized GP2XWIZ backend.

svn-id: r50514

6 files changed, 210 insertions, 1164 deletions

diff --git a/backends/platform/gp2xwiz/gp2xwiz-events.cpp b/backends/platform/gp2xwiz/gp2xwiz-events.cpp
deleted file mode 100644
index a69aa42967..0000000000
--- a/backends/platform/gp2xwiz/gp2xwiz-events.cpp
+++ /dev/null
@@ -1,500 +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.
- *
- * $URL$
- * $Id$
- *
- */
-
-/*
- * GP2X Wiz: Device Specific Event Handling.
- *
- */
-
-#include "backends/platform/gp2xwiz/gp2xwiz-sdl.h"
-#include "backends/platform/gp2xwiz/gp2xwiz-hw.h"
-#include "graphics/scaler/aspect.h"
-
-#include "common/util.h"
-#include "common/events.h"
-
-// FIXME move joystick defines out and replace with confile file options
-// we should really allow users to map any key to a joystick button using the keymapper.
-#define JOY_DEADZONE 2200
-
-#define JOY_XAXIS 0
-#define JOY_YAXIS 1
-
-/* GP2X Wiz: Main Joystick Mappings */
-enum {
-	GP2X_BUTTON_UP			= 0,
-	GP2X_BUTTON_UPLEFT		= 1,
-	GP2X_BUTTON_LEFT		= 2,
-	GP2X_BUTTON_DOWNLEFT	= 3,
-	GP2X_BUTTON_DOWN		= 4,
-	GP2X_BUTTON_DOWNRIGHT	= 5,
-	GP2X_BUTTON_RIGHT		= 6,
-	GP2X_BUTTON_UPRIGHT		= 7,
-	GP2X_BUTTON_MENU		= 8,
-	GP2X_BUTTON_SELECT		= 9,
-	GP2X_BUTTON_L			= 10,
-	GP2X_BUTTON_R			= 11,
-	GP2X_BUTTON_A			= 12,
-	GP2X_BUTTON_B			= 13,
-	GP2X_BUTTON_X			= 14,
-	GP2X_BUTTON_Y			= 15,
-	GP2X_BUTTON_VOLUP		= 16,
-	GP2X_BUTTON_VOLDOWN		= 17
-};
-
-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_GP2XWIZ::fillMouseEvent(Common::Event &event, int x, int y) {
-	if (_videoMode.mode == GFX_HALF && !_overlayVisible){
-		event.mouse.x = x*2;
-		event.mouse.y = y*2;
-	} else {
-		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);
-	}
-}
-
-static byte SDLModToOSystemKeyFlags(SDLMod mod) {
-	byte b = 0;
-	if (mod & KMOD_SHIFT)
-		b |= Common::KBD_SHIFT;
-	if (mod & KMOD_ALT)
-		b |= Common::KBD_ALT;
-	if (mod & KMOD_CTRL)
-		b |= Common::KBD_CTRL;
-
-	return b;
-}
-
-void OSystem_GP2XWIZ::moveStick() {
-	bool stickBtn[32];
-
-	memcpy(stickBtn, _stickBtn, sizeof(stickBtn));
-
-	if ((stickBtn[0])||(stickBtn[2])||(stickBtn[4])||(stickBtn[6]))
-		stickBtn[1] = stickBtn[3] = stickBtn[5] = stickBtn[7] = 0;
-
-	if ((stickBtn[1])||(stickBtn[2])||(stickBtn[3])) {
-		if (_km.x_down_count!=2) {
-			_km.x_vel = -1;
-			_km.x_down_count = 1;
-		} else
-			_km.x_vel = -4;
-	} else if ((stickBtn[5])||(stickBtn[6])||(stickBtn[7])) {
-		if (_km.x_down_count!=2) {
-			_km.x_vel = 1;
-			_km.x_down_count = 1;
-		} else
-			_km.x_vel = 4;
-	} else {
-		_km.x_vel = 0;
-		_km.x_down_count = 0;
-	}
-
-
-	if ((stickBtn[0])||(stickBtn[1])||(stickBtn[7])) {
-		if (_km.y_down_count!=2) {
-			_km.y_vel = -1;
-			_km.y_down_count = 1;
-		} else
-			_km.y_vel = -4;
-	} else if ((stickBtn[3])||(stickBtn[4])||(stickBtn[5])) {
-		if (_km.y_down_count!=2) {
-			_km.y_vel = 1;
-			_km.y_down_count = 1;
-		} else
-			_km.y_vel = 4;
-	} else {
-		_km.y_vel = 0;
-		_km.y_down_count = 0;
-	}
-}
-
-/* Quick default button states for modifiers. */
-int GP2X_BUTTON_STATE_L					=	false;
-
-/* Override the SDL pollEvent with the Wiz's own event code. */
-bool OSystem_GP2XWIZ::pollEvent(Common::Event &event) {
-	SDL_Event ev;
-	int axis;
-	byte b = 0;
-
-	handleKbdMouse();
-
-	// If the screen mode changed, send an Common::EVENT_SCREEN_CHANGED
-	if (_modeChanged) {
-		_modeChanged = false;
-		event.type = Common::EVENT_SCREEN_CHANGED;
-		return true;
-	}
-
-	// GP2X Wiz Input mappings.
-
-	/*
-	Single Button
-
-	Movement:
-
-	GP2X_BUTTON_UP              Cursor Up
-	GP2X_BUTTON_DOWN            Cursor Down
-	GP2X_BUTTON_LEFT            Cursor Left
-	GP2X_BUTTON_RIGHT           Cursor Right
-
-	GP2X_BUTTON_UPLEFT          Cursor Up Left
-	GP2X_BUTTON_UPRIGHT         Cursor Up Right
-	GP2X_BUTTON_DOWNLEFT        Cursor Down Left
-	GP2X_BUTTON_DOWNRIGHT       Cursor Down Right
-
-	Button Emulation:
-
-	GP2X_BUTTON_A				. (Period)
-	GP2X_BUTTON_B               Left Mouse Click
-	GP2X_BUTTON_Y               Space Bar
-	GP2X_BUTTON_X               Right Mouse Click
-	GP2X_BUTTON_L				Combo Modifier (Left Trigger)
-	GP2X_BUTTON_R               Return (Right Trigger)
-	GP2X_BUTTON_MENU			F5 (Game Menu)
-	GP2X_BUTTON_SELECT          Escape
-	GP2X_BUTTON_VOLUP           /dev/mixer Global Volume Up
-	GP2X_BUTTON_VOLDOWN         /dev/mixer Global Volume Down
-
-	Combos:
-
-	GP2X_BUTTON_VOLUP &	GP2X_BUTTON_VOLDOWN		0 (For Monkey 2 CP) or Virtual Keyboard if enabled
-	GP2X_BUTTON_L &	GP2X_BUTTON_SELECT			Common::EVENT_QUIT (Calls Sync() to make sure SD is flushed)
-	GP2X_BUTTON_L &	GP2X_BUTTON_MENU			Common::EVENT_MAINMENU (ScummVM Global Main Menu)
-	GP2X_BUTTON_L &	GP2X_BUTTON_A				Common::EVENT_PREDICTIVE_DIALOG for predictive text entry box (AGI games)
-	*/
-
-	while (SDL_PollEvent(&ev)) {
-
-		switch (ev.type) {
-		case SDL_KEYDOWN:{
-			b = event.kbd.flags = SDLModToOSystemKeyFlags(SDL_GetModState());
-
-			const bool event_complete = remapKey(ev,event);
-
-			if (event_complete)
-				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;
-			}
-		case SDL_KEYUP:
-			{
-			const bool event_complete = remapKey(ev,event);
-
-			if (event_complete)
-				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);
-			b = event.kbd.flags = SDLModToOSystemKeyFlags(SDL_GetModState());
-
-			// Ctrl-Alt-<key> will change the GFX mode
-			if ((b & (Common::KBD_CTRL|Common::KBD_ALT)) == (Common::KBD_CTRL|Common::KBD_ALT)) {
-				// Swallow these key up events
-				break;
-			}
-
-			return true;
-			}
-		case SDL_MOUSEMOTION:
-			event.type = Common::EVENT_MOUSEMOVE;
-			fillMouseEvent(event, ev.motion.x, ev.motion.y);
-
-			setMousePos(event.mouse.x, event.mouse.y);
-			return true;
-
-		case SDL_MOUSEBUTTONDOWN:
-			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
-				break;
-
-			fillMouseEvent(event, ev.button.x, ev.button.y);
-
-			return true;
-
-		case SDL_MOUSEBUTTONUP:
-			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
-				break;
-			fillMouseEvent(event, ev.button.x, ev.button.y);
-
-			return true;
-
-		case SDL_JOYBUTTONDOWN:
-			_stickBtn[ev.jbutton.button] = 1;
-			if (ev.jbutton.button == GP2X_BUTTON_B) {
-				event.type = Common::EVENT_LBUTTONDOWN;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else if (ev.jbutton.button == GP2X_BUTTON_X) {
-				event.type = Common::EVENT_RBUTTONDOWN;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else if (_stickBtn[GP2X_BUTTON_L] && (ev.jbutton.button == GP2X_BUTTON_SELECT)) {
-				event.type = Common::EVENT_QUIT;
-			} else if (ev.jbutton.button < 8) {
-				moveStick();
-				event.type = Common::EVENT_MOUSEMOVE;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else {
-				event.type = Common::EVENT_KEYDOWN;
-				event.kbd.flags = 0;
-				switch (ev.jbutton.button) {
-					case GP2X_BUTTON_L:
-						GP2X_BUTTON_STATE_L = true;
-						break;
-					case GP2X_BUTTON_R:
-						if (GP2X_BUTTON_STATE_L == true) {
-#ifdef ENABLE_VKEYBD
-							event.kbd.keycode = Common::KEYCODE_F7;
-							event.kbd.ascii = mapKey(SDLK_F7, ev.key.keysym.mod, 0);
-#else
-							event.kbd.keycode = Common::KEYCODE_0;
-							event.kbd.ascii = mapKey(SDLK_0, ev.key.keysym.mod, 0);
-#endif
-						} else {
-							event.kbd.keycode = Common::KEYCODE_RETURN;
-							event.kbd.ascii = mapKey(SDLK_RETURN, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_SELECT:
-						if (GP2X_BUTTON_STATE_L == true) {
-							event.type = Common::EVENT_QUIT;
-						} else {
-							event.kbd.keycode = Common::KEYCODE_ESCAPE;
-							event.kbd.ascii = mapKey(SDLK_ESCAPE, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_A:
-						if (GP2X_BUTTON_STATE_L == true) {
-							event.type = Common::EVENT_PREDICTIVE_DIALOG;
-						} else {
-						event.kbd.keycode = Common::KEYCODE_PERIOD;
-						event.kbd.ascii = mapKey(SDLK_PERIOD, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_Y:
-						event.kbd.keycode = Common::KEYCODE_SPACE;
-						event.kbd.ascii = mapKey(SDLK_SPACE, ev.key.keysym.mod, 0);
-						break;
-					case GP2X_BUTTON_MENU:
-						if (GP2X_BUTTON_STATE_L == true) {
-							event.type = Common::EVENT_MAINMENU;
-						} else {
-							event.kbd.keycode = Common::KEYCODE_F5;
-							event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_VOLUP:
-						WIZ_HW::mixerMoveVolume(2);
-						if (WIZ_HW::volumeLevel == 100) {
-							displayMessageOnOSD("Maximum Volume");
-						} else {
-							displayMessageOnOSD("Increasing Volume");
-						}
-						break;
-
-					case GP2X_BUTTON_VOLDOWN:
-						WIZ_HW::mixerMoveVolume(1);
-						if (WIZ_HW::volumeLevel == 0) {
-							displayMessageOnOSD("Minimal Volume");
-						} else {
-							displayMessageOnOSD("Decreasing Volume");
-						}
-						break;
-				}
-			}
-			return true;
-
-		case SDL_JOYBUTTONUP:
-			_stickBtn[ev.jbutton.button] = 0;
-			if (ev.jbutton.button == GP2X_BUTTON_B) {
-				event.type = Common::EVENT_LBUTTONUP;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else if (ev.jbutton.button == GP2X_BUTTON_X) {
-				event.type = Common::EVENT_RBUTTONUP;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else if (ev.jbutton.button < 8) {
-				moveStick();
-				event.type = Common::EVENT_MOUSEMOVE;
-				fillMouseEvent(event, _km.x, _km.y);
-			} else {
-				event.type = Common::EVENT_KEYUP;
-				event.kbd.flags = 0;
-				switch (ev.jbutton.button) {
-					case GP2X_BUTTON_SELECT:
-						event.kbd.keycode = Common::KEYCODE_ESCAPE;
-						event.kbd.ascii = mapKey(SDLK_ESCAPE, ev.key.keysym.mod, 0);
-						break;
-					case GP2X_BUTTON_A:
-						event.kbd.keycode = Common::KEYCODE_PERIOD;
-						event.kbd.ascii = mapKey(SDLK_PERIOD, ev.key.keysym.mod, 0);
-						break;
-					case GP2X_BUTTON_Y:
-						event.kbd.keycode = Common::KEYCODE_SPACE;
-						event.kbd.ascii = mapKey(SDLK_SPACE, ev.key.keysym.mod, 0);
-						break;
-					case GP2X_BUTTON_MENU:
-						if (GP2X_BUTTON_STATE_L == true) {
-							event.type = Common::EVENT_MAINMENU;
-						} else {
-							event.kbd.keycode = Common::KEYCODE_F5;
-							event.kbd.ascii = mapKey(SDLK_F5, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_L:
-						GP2X_BUTTON_STATE_L = false;
-						break;
-					case GP2X_BUTTON_R:
-						if (GP2X_BUTTON_STATE_L == true) {
-#ifdef ENABLE_VKEYBD
-							event.kbd.keycode = Common::KEYCODE_F7;
-							event.kbd.ascii = mapKey(SDLK_F7, ev.key.keysym.mod, 0);
-#else
-							event.kbd.keycode = Common::KEYCODE_0;
-							event.kbd.ascii = mapKey(SDLK_0, ev.key.keysym.mod, 0);
-#endif
-						} else {
-							event.kbd.keycode = Common::KEYCODE_RETURN;
-							event.kbd.ascii = mapKey(SDLK_RETURN, ev.key.keysym.mod, 0);
-						}
-						break;
-					case GP2X_BUTTON_VOLUP:
-						break;
-					case GP2X_BUTTON_VOLDOWN:
-						break;
-				}
-			}
-			return true;
-
-		case SDL_JOYAXISMOTION:
-			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) {
-				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;
-				}
-
-			} 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;
-
-		case SDL_VIDEOEXPOSE:
-			_forceFull = true;
-			break;
-
-		case SDL_QUIT:
-			event.type = Common::EVENT_QUIT;
-			return true;
-		}
-	}
-	return false;
-}
-
-bool OSystem_GP2XWIZ::remapKey(SDL_Event &ev,Common::Event &event) {
-	return false;
-}
diff --git a/backends/platform/gp2xwiz/gp2xwiz-graphics.cpp b/backends/platform/gp2xwiz/gp2xwiz-graphics.cpp
deleted file mode 100644
index 6abddd52f3..0000000000
--- a/backends/platform/gp2xwiz/gp2xwiz-graphics.cpp
+++ /dev/null
@@ -1,446 +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/gp2xwiz/gp2xwiz-sdl.h"
-
-#include "common/mutex.h"
-#include "graphics/font.h"
-#include "graphics/fontman.h"
-#include "graphics/scaler.h"
-#include "graphics/scaler/aspect.h"
-#include "graphics/scaler/downscaler.h"
-#include "graphics/surface.h"
-
-static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
-	{"1x", "Fullscreen", GFX_NORMAL},
-//	{"½x", "Downscale", GFX_HALF},
-	{0, 0, 0}
-};
-
-
-const OSystem::GraphicsMode *OSystem_GP2XWIZ::getSupportedGraphicsModes() const {
-	return s_supportedGraphicsModes;
-}
-
-int OSystem_GP2XWIZ::getDefaultGraphicsMode() const {
-	return GFX_NORMAL;
-}
-
-bool OSystem_GP2XWIZ::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;
-	case GFX_HALF:
-		newScaleFactor = 1;
-		break;
-	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_GP2XWIZ::setGraphicsModeIntern() {
-	Common::StackLock lock(_graphicsMutex);
-	ScalerProc *newScalerProc = 0;
-
-	switch (_videoMode.mode) {
-	case GFX_NORMAL:
-		newScalerProc = Normal1x;
-		break;
-	case GFX_HALF:
-		newScalerProc = DownscaleAllByHalf;
-		break;
-
-	default:
-		error("Unknown gfx mode %d", _videoMode.mode);
-	}
-
-	_scalerProc = newScalerProc;
-
-	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();
-}
-
-
-void OSystem_GP2XWIZ::initSize(uint w, uint h) {
-	assert(_transactionMode == kTransactionActive);
-
-	// Avoid redundant res changes
-	if ((int)w == _videoMode.screenWidth && (int)h == _videoMode.screenHeight)
-		return;
-
-	_videoMode.screenWidth = w;
-	_videoMode.screenHeight = h;
-	if (w > 320 || h > 240){
-		setGraphicsMode(GFX_HALF);
-		setGraphicsModeIntern();
-		toggleMouseGrab();
-	}
-
-	_transactionDetails.sizeChanged = true;
-}
-
-bool OSystem_GP2XWIZ::loadGFXMode() {
-	_videoMode.overlayWidth = 320;
-	_videoMode.overlayHeight = 240;
-	_videoMode.fullscreen = true;
-
-	if (_videoMode.screenHeight != 200 && _videoMode.screenHeight != 400)
-		_videoMode.aspectRatioCorrection = false;
-
-	OSystem_SDL::loadGFXMode();
-}
-
-void OSystem_GP2XWIZ::drawMouse() {
-	if (!_mouseVisible || !_mouseSurface) {
-		_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
-		return;
-	}
-
-	SDL_Rect dst;
-	int scale;
-	int hotX, hotY;
-
-	if (_videoMode.mode == GFX_HALF && !_overlayVisible){
-		dst.x = _mouseCurState.x/2;
-		dst.y = _mouseCurState.y/2;
-	} else {
-		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);
-}
-
-void OSystem_GP2XWIZ::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){
-		if (_videoMode.mode == GFX_HALF && !_overlayVisible){
-			addDirtyRect(x*2, y*2, _mouseBackup.w*2, _mouseBackup.h*2);
-		} else {
-			addDirtyRect(x, y, _mouseBackup.w, _mouseBackup.h);
-		}
-	}
-}
-
-void OSystem_GP2XWIZ::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) {
-		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 dst_w = r->w;
-			register int orig_dst_y = 0;
-			register int dst_x = r->x;
-			register int src_y;
-			register int src_x;
-
-			if (dst_y < height) {
-				dst_h = r->h;
-				if (dst_h > height - dst_y)
-					dst_h = height - dst_y;
-
-				orig_dst_y = dst_y;
-				src_x = dst_x;
-				src_y = dst_y;
-
-				if (_videoMode.aspectRatioCorrection && !_overlayVisible)
-					dst_y = real2Aspect(dst_y);
-
-				assert(scalerProc != NULL);
-
-				if (_videoMode.mode == GFX_HALF && scalerProc == DownscaleAllByHalf){
-					if (dst_x%2==1){
-						dst_x--;
-						dst_w++;
-					}
-					if (dst_y%2==1){
-						dst_y--;
-						dst_h++;
-					}
-					src_x = dst_x;
-					src_y = dst_y;
-					dst_x = dst_x / 2;
-					dst_y = dst_y / 2;
-				}
-				scalerProc((byte *)srcSurf->pixels + (src_x * 2 + 2) + (src_y + 1) * srcPitch, srcPitch,
-						   (byte *)_hwscreen->pixels + dst_x * 2 + dst_y * dstPitch, dstPitch, dst_w, dst_h);
-			}
-
-			if (_videoMode.mode == GFX_HALF && scalerProc == DownscaleAllByHalf){
-				r->w = r->w / 2;
-				r->h = dst_h / 2;
-			} else {
-				r->w = r->w;
-				r->h = dst_h;
-			}
-
-			r->x = dst_x;
-			r->y = dst_y;
-
-
-#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 = (_videoMode.mode == GFX_HALF) ? effectiveScreenHeight()/2 : 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;
-}
-
-void OSystem_GP2XWIZ::showOverlay() {
-	if (_videoMode.mode == GFX_HALF){
-		_mouseCurState.x = _mouseCurState.x / 2;
-		_mouseCurState.y = _mouseCurState.y / 2;
-	}
-	OSystem_SDL::showOverlay();
-}
-
-void OSystem_GP2XWIZ::hideOverlay() {
-	if (_videoMode.mode == GFX_HALF){
-		_mouseCurState.x = _mouseCurState.x * 2;
-		_mouseCurState.y = _mouseCurState.y * 2;
-	}
-	OSystem_SDL::hideOverlay();
-}
-
-void OSystem_GP2XWIZ::warpMouse(int x, int y) {
-	if (_mouseCurState.x != x || _mouseCurState.y != y) {
-		if (_videoMode.mode == GFX_HALF && !_overlayVisible){
-			x = x / 2;
-			y = y / 2;
-		}
-	}
-	OSystem_SDL::warpMouse(x, y);
-}
diff --git a/backends/platform/gp2xwiz/gp2xwiz-main.cpp b/backends/platform/gp2xwiz/gp2xwiz-main.cpp
index 394c3090c3..d6601f5250 100644
--- a/backends/platform/gp2xwiz/gp2xwiz-main.cpp
+++ b/backends/platform/gp2xwiz/gp2xwiz-main.cpp
@@ -23,194 +23,28 @@
  *
  */
 
-#include "common/scummsys.h"
-#include <SDL/SDL.h>
-
 #include "backends/platform/gp2xwiz/gp2xwiz-sdl.h"
-#include "backends/platform/gp2xwiz/gp2xwiz-hw.h"
 #include "backends/plugins/posix/posix-provider.h"
 #include "base/main.h"
-#include "base/internal_version.h"
-
-#include "common/archive.h"
-#include "common/config-manager.h"
-#include "common/debug.h"
-#include "common/events.h"
-#include "common/util.h"
-
-#include "common/file.h"
-#include "base/main.h"
-
-#include "backends/saves/default/default-saves.h"
-
-#include "backends/timer/default/default-timer.h"
-#include "sound/mixer_intern.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <limits.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <time.h>	// for getTimeAndDate()
-
-/* Dump console info to files. */
-// #define DUMP_STDOUT
 
 int main(int argc, char *argv[]) {
 
+	// Create our OSystem instance
 	g_system = new OSystem_GP2XWIZ();
 	assert(g_system);
 
+	// Pre initialize the backend
+	((OSystem_GP2XWIZ *)g_system)->init();
+
 #ifdef DYNAMIC_MODULES
 	PluginManager::instance().addPluginProvider(new POSIXPluginProvider());
 #endif
 
 	// Invoke the actual ScummVM main entry point:
 	int res = scummvm_main(argc, argv);
-	g_system->quit();
-
-	return res;
-}
-
-void OSystem_GP2XWIZ::initBackend() {
-
-	/* Setup default save path to be workingdir/saves */
-
-	char savePath[PATH_MAX+1];
-	char workDirName[PATH_MAX+1];
-
-	if (getcwd(workDirName, PATH_MAX) == NULL) {
-		error("Could not obtain current working directory.");
-	} else {
-		printf("Current working directory: %s\n", workDirName);
-	}
-
-	strcpy(savePath, workDirName);
-	strcat(savePath, "/saves");
-	printf("Current save directory: %s\n", savePath);
-	struct stat sb;
-	if (stat(savePath, &sb) == -1)
-		if (errno == ENOENT) // Create the dir if it does not exist
-			if (mkdir(savePath, 0755) != 0)
-				warning("mkdir for '%s' failed!", savePath);
-
-	_savefile = new DefaultSaveFileManager(savePath);
-
-	#ifdef DUMP_STDOUT
-		// The GP2X Wiz has a serial console on the breakout board but most users do not use this so we
-		// output all our STDOUT and STDERR to files for debug purposes.
-		char STDOUT_FILE[PATH_MAX+1];
-		char STDERR_FILE[PATH_MAX+1];
-
-		strcpy(STDOUT_FILE, workDirName);
-		strcpy(STDERR_FILE, workDirName);
-		strcat(STDOUT_FILE, "/scummvm.stdout.txt");
-		strcat(STDERR_FILE, "/scummvm.stderr.txt");
-
-		// Flush the output in case anything is queued
-		fclose(stdout);
-		fclose(stderr);
-
-		// Redirect standard input and standard output
-		FILE *newfp = freopen(STDOUT_FILE, "w", stdout);
-		if (newfp == NULL) {
-		#if !defined(stdout)
-			stdout = fopen(STDOUT_FILE, "w");
-		#else
-			newfp = fopen(STDOUT_FILE, "w");
-			if (newfp) {
-				*stdout = *newfp;
-			}
-		#endif
-		}
-
-		newfp = freopen(STDERR_FILE, "w", stderr);
-		if (newfp == NULL) {
-		#if !defined(stderr)
-			stderr = fopen(STDERR_FILE, "w");
-		#else
-			newfp = fopen(STDERR_FILE, "w");
-			if (newfp) {
-				*stderr = *newfp;
-			}
-		#endif
-		}
-
-		setbuf(stderr, NULL);
-		printf("%s\n", "Debug: STDOUT and STDERR redirected to text files.");
-	#endif /* DUMP_STDOUT */
 
-	/* Initialise any GP2X Wiz specific stuff we may want (Batt Status, scaler etc.) */
-	WIZ_HW::deviceInit();
+	// Free OSystem
+	delete (OSystem_GP2XWIZ *)g_system;
 
-	/* Set Default hardware mixer volume to a preset level (VOLUME_INITIAL). This is done to 'reset' volume level if set by other apps. */
-	WIZ_HW::mixerMoveVolume(0);
-
-	/* Up default volume values as we use a seperate system level volume anyway. */
-	ConfMan.registerDefault("music_volume", 192);
-	ConfMan.registerDefault("sfx_volume", 192);
-	ConfMan.registerDefault("speech_volume", 192);
-
-	/* Trigger autosave every 4 minutes - On low batts 5 mins is about your warning time. */
-	ConfMan.registerDefault("autosave_period", 4 * 60);
-
-	/* Make sure that aspect ratio correction is enabled on the 1st run to stop users asking me what the 'wasted space' is ;-). */
-	ConfMan.registerDefault("aspect_ratio", true);
-
-	/* Make sure SDL knows that we have a joystick we want to use. */
-	ConfMan.setInt("joystick_num", 0);
-
-	printf("%s\n", "Passing to OSystem::SDL initBackend.");
-
-	/* Pass to SDL backend to do the heavy lifting */
-	OSystem_SDL::initBackend();
-}
-
-void OSystem_GP2XWIZ::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
-
-	/* Setup default extra data paths for engine data files and plugins */
-	char workDirName[PATH_MAX+1];
-
-	if (getcwd(workDirName, PATH_MAX) == NULL) {
-		error("Error: Could not obtain current working directory.");
-	}
-
-	Common::FSNode workdirNode(workDirName);
-	if (workdirNode.exists() && workdirNode.isDirectory()) {
-		s.add("__GP2XWIZ_WORKDIR__", new Common::FSDirectory(workDirName), priority);
-	}
-
-	char enginedataPath[PATH_MAX+1];
-
-	strcpy(enginedataPath, workDirName);
-	strcat(enginedataPath, "/engine-data");
-
-	Common::FSNode engineNode(enginedataPath);
-	if (engineNode.exists() && engineNode.isDirectory()) {
-		s.add("__GP2XWIZ_ENGDATA__", new Common::FSDirectory(enginedataPath), priority);
-	}
-
-	char pluginsPath[PATH_MAX+1];
-
-	strcpy(pluginsPath, workDirName);
-	strcat(pluginsPath, "/plugins");
-
-	Common::FSNode pluginsNode(pluginsPath);
-	if (pluginsNode.exists() && pluginsNode.isDirectory()) {
-		s.add("__GP2XWIZ_PLUGINS__", new Common::FSDirectory(pluginsPath), priority);
-	}
-}
-
-void OSystem_GP2XWIZ::quit() {
-
-	WIZ_HW::deviceDeinit();
-
-	#ifdef DUMP_STDOUT
-		printf("%s\n", "Debug: STDOUT and STDERR text files closed.");
-		fclose(stdout);
-		fclose(stderr);
-	#endif /* DUMP_STDOUT */
-
-	OSystem_SDL::quit();
+	return res;
 }
diff --git a/backends/platform/gp2xwiz/gp2xwiz-sdl.cpp b/backends/platform/gp2xwiz/gp2xwiz-sdl.cpp
new file mode 100644
index 0000000000..f37f4dd64a
--- /dev/null
+++ b/backends/platform/gp2xwiz/gp2xwiz-sdl.cpp
@@ -0,0 +1,194 @@
+/* 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/gp2xwiz/gp2xwiz-sdl.h"
+#include "backends/platform/gp2xwiz/gp2xwiz-hw.h"
+
+#include "backends/graphics/gp2xwizsdl/gp2xwizsdl-graphics.h"
+#include "backends/events/gp2xwizsdl/gp2xwizsdl-events.h"
+#include "backends/saves/default/default-saves.h"
+
+#include "common/config-manager.h"
+#include "common/debug.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+/* Dump console info to files. */
+// #define DUMP_STDOUT
+
+void OSystem_GP2XWIZ::initBackend() {
+
+	/* Setup default save path to be workingdir/saves */
+
+	char savePath[PATH_MAX+1];
+	char workDirName[PATH_MAX+1];
+
+	if (getcwd(workDirName, PATH_MAX) == NULL) {
+		error("Could not obtain current working directory.");
+	} else {
+		printf("Current working directory: %s\n", workDirName);
+	}
+
+	strcpy(savePath, workDirName);
+	strcat(savePath, "/saves");
+	printf("Current save directory: %s\n", savePath);
+	struct stat sb;
+	if (stat(savePath, &sb) == -1)
+		if (errno == ENOENT) // Create the dir if it does not exist
+			if (mkdir(savePath, 0755) != 0)
+				warning("mkdir for '%s' failed!", savePath);
+
+	_savefileManager = new DefaultSaveFileManager(savePath);
+
+	#ifdef DUMP_STDOUT
+		// The GP2X Wiz has a serial console on the breakout board but most users do not use this so we
+		// output all our STDOUT and STDERR to files for debug purposes.
+		char STDOUT_FILE[PATH_MAX+1];
+		char STDERR_FILE[PATH_MAX+1];
+
+		strcpy(STDOUT_FILE, workDirName);
+		strcpy(STDERR_FILE, workDirName);
+		strcat(STDOUT_FILE, "/scummvm.stdout.txt");
+		strcat(STDERR_FILE, "/scummvm.stderr.txt");
+
+		// Flush the output in case anything is queued
+		fclose(stdout);
+		fclose(stderr);
+
+		// Redirect standard input and standard output
+		FILE *newfp = freopen(STDOUT_FILE, "w", stdout);
+		if (newfp == NULL) {
+		#if !defined(stdout)
+			stdout = fopen(STDOUT_FILE, "w");
+		#else
+			newfp = fopen(STDOUT_FILE, "w");
+			if (newfp) {
+				*stdout = *newfp;
+			}
+		#endif
+		}
+
+		newfp = freopen(STDERR_FILE, "w", stderr);
+		if (newfp == NULL) {
+		#if !defined(stderr)
+			stderr = fopen(STDERR_FILE, "w");
+		#else
+			newfp = fopen(STDERR_FILE, "w");
+			if (newfp) {
+				*stderr = *newfp;
+			}
+		#endif
+		}
+
+		setbuf(stderr, NULL);
+		printf("%s\n", "Debug: STDOUT and STDERR redirected to text files.");
+	#endif /* DUMP_STDOUT */
+
+	/* Initialise any GP2X Wiz specific stuff we may want (Batt Status, scaler etc.) */
+	WIZ_HW::deviceInit();
+
+	/* Set Default hardware mixer volume to a preset level (VOLUME_INITIAL). This is done to 'reset' volume level if set by other apps. */
+	WIZ_HW::mixerMoveVolume(0);
+
+	/* Up default volume values as we use a seperate system level volume anyway. */
+	ConfMan.registerDefault("music_volume", 192);
+	ConfMan.registerDefault("sfx_volume", 192);
+	ConfMan.registerDefault("speech_volume", 192);
+
+	/* Trigger autosave every 4 minutes - On low batts 5 mins is about your warning time. */
+	ConfMan.registerDefault("autosave_period", 4 * 60);
+
+	/* Make sure that aspect ratio correction is enabled on the 1st run to stop users asking me what the 'wasted space' is ;-). */
+	ConfMan.registerDefault("aspect_ratio", true);
+
+	/* Make sure SDL knows that we have a joystick we want to use. */
+	ConfMan.setInt("joystick_num", 0);
+
+	// Create the events manager
+	if (_eventManager == 0)
+		_eventManager = new GP2XWIZSdlEventManager(this);
+
+	// Create the graphics manager
+	if (_graphicsManager == 0)
+		_graphicsManager = new GP2XWIZSdlGraphicsManager();
+
+	printf("%s\n", "Passing to OSystem_POSIX initBackend.");
+
+	/* Pass to SDL backend to do the heavy lifting */
+	OSystem_POSIX::initBackend();
+}
+
+void OSystem_GP2XWIZ::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
+
+	/* Setup default extra data paths for engine data files and plugins */
+	char workDirName[PATH_MAX + 1];
+
+	if (getcwd(workDirName, PATH_MAX) == NULL) {
+		error("Error: Could not obtain current working directory.");
+	}
+
+	Common::FSNode workdirNode(workDirName);
+	if (workdirNode.exists() && workdirNode.isDirectory()) {
+		s.add("__GP2XWIZ_WORKDIR__", new Common::FSDirectory(workDirName), priority);
+	}
+
+	char enginedataPath[PATH_MAX + 1];
+
+	strcpy(enginedataPath, workDirName);
+	strcat(enginedataPath, "/engine-data");
+
+	Common::FSNode engineNode(enginedataPath);
+	if (engineNode.exists() && engineNode.isDirectory()) {
+		s.add("__GP2XWIZ_ENGDATA__", new Common::FSDirectory(enginedataPath), priority);
+	}
+
+	char pluginsPath[PATH_MAX + 1];
+
+	strcpy(pluginsPath, workDirName);
+	strcat(pluginsPath, "/plugins");
+
+	Common::FSNode pluginsNode(pluginsPath);
+	if (pluginsNode.exists() && pluginsNode.isDirectory()) {
+		s.add("__GP2XWIZ_PLUGINS__", new Common::FSDirectory(pluginsPath), priority);
+	}
+}
+
+void OSystem_GP2XWIZ::quit() {
+
+	WIZ_HW::deviceDeinit();
+
+	#ifdef DUMP_STDOUT
+		printf("%s\n", "Debug: STDOUT and STDERR text files closed.");
+		fclose(stdout);
+		fclose(stderr);
+	#endif /* DUMP_STDOUT */
+
+	OSystem_POSIX::quit();
+}
diff --git a/backends/platform/gp2xwiz/gp2xwiz-sdl.h b/backends/platform/gp2xwiz/gp2xwiz-sdl.h
index e312d0f26d..56ca883b02 100644
--- a/backends/platform/gp2xwiz/gp2xwiz-sdl.h
+++ b/backends/platform/gp2xwiz/gp2xwiz-sdl.h
@@ -23,55 +23,20 @@
  *
  */
 
-#ifndef GP2XWIZ_SDL_H
-#define GP2XWIZ_SDL_H
+#ifndef PLATFORM_SDL_GP2XWIZ_H
+#define PLATFORM_SDL_GP2XWIZ_H
 
-#include "backends/platform/sdl/sdl.h"
-
-// FIXME: For now keep hacks in this header to save polluting the SDL backend.
-enum {
-    GFX_HALF = 12
-};
-
-#define __GP2XWIZ__
-#define MIXER_DOUBLE_BUFFERING 1
+#include "backends/platform/sdl/posix/posix.h"
 
 #ifndef PATH_MAX
 	#define PATH_MAX 255
 #endif
 
-class OSystem_GP2XWIZ : public OSystem_SDL {
+class OSystem_GP2XWIZ : public OSystem_POSIX {
 public:
-	OSystem_GP2XWIZ() {}
-
-	/* Graphics */
-    void initSize(uint w, uint h);
-    void setGraphicsModeIntern();
-    bool setGraphicsMode(int mode);
-    void internUpdateScreen();
-    const OSystem::GraphicsMode *getSupportedGraphicsModes() const;
-	bool setGraphicsMode(const char *name);
-    int getDefaultGraphicsMode() const;
-    bool loadGFXMode();
-    void drawMouse();
-    void undrawMouse();
-    void showOverlay();
-    void hideOverlay();
-
-	/* Event Stuff */
-	bool pollEvent(Common::Event &event);
-	void moveStick();
-	void fillMouseEvent(Common::Event&, int, int);
-	void warpMouse(int, int);
-	bool remapKey(SDL_Event&, Common::Event&);
-
-	/* Platform Setup Stuff */
-	void addSysArchivesToSearchSet(Common::SearchSet &s, int priority);
-	void initBackend();
-	void quit();
-
-protected:
-	bool _stickBtn[32];
+	virtual void initBackend();
+	virtual void quit();
+	virtual void addSysArchivesToSearchSet(Common::SearchSet &s, int priority);
 };
 
 #endif
diff --git a/backends/platform/gp2xwiz/module.mk b/backends/platform/gp2xwiz/module.mk
index f457d51615..9e66494f27 100644
--- a/backends/platform/gp2xwiz/module.mk
+++ b/backends/platform/gp2xwiz/module.mk
@@ -1,10 +1,9 @@
 MODULE := backends/platform/gp2xwiz
 
 MODULE_OBJS := \
-	gp2xwiz-events.o \
-	gp2xwiz-graphics.o \
 	gp2xwiz-hw.o \
-	gp2xwiz-main.o
+	gp2xwiz-main.o \
+	gp2xwiz-sdl.o
 
 MODULE_DIRS += \
 	backends/platform/gp2xwiz/