// Copyright (C) 2002-2009 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#include "IrrCompileConfig.h"

#ifdef _IRR_USE_WINDOWS_DEVICE_

#include "CIrrDeviceWin32.h"
#include "IEventReceiver.h"
#include "irrList.h"
#include "os.h"

#include "CTimer.h"
#include "irrString.h"
#include "COSOperator.h"
#include "dimension2d.h"
#include <winuser.h>

namespace irr
{
	namespace video
	{
		#ifdef _IRR_COMPILE_WITH_DIRECT3D_8_
		IVideoDriver* createDirectX8Driver(const core::dimension2d<u32>& screenSize, HWND window,
			u32 bits, bool fullscreen, bool stencilbuffer, io::IFileSystem* io,
			bool pureSoftware, bool highPrecisionFPU, bool vsync, u8 antiAlias);
		#endif

		#ifdef _IRR_COMPILE_WITH_DIRECT3D_9_
		IVideoDriver* createDirectX9Driver(const core::dimension2d<u32>& screenSize, HWND window,
			u32 bits, bool fullscreen, bool stencilbuffer, io::IFileSystem* io,
			bool pureSoftware, bool highPrecisionFPU, bool vsync, u8 antiAlias);
		#endif

		#ifdef _IRR_COMPILE_WITH_OPENGL_
		IVideoDriver* createOpenGLDriver(const irr::SIrrlichtCreationParameters& params, io::IFileSystem* io);
		#endif
	}
} // end namespace irr


struct SEnvMapper
{
	HWND hWnd;
	irr::CIrrDeviceWin32* irrDev;
};

irr::core::list<SEnvMapper> EnvMap;

SEnvMapper* getEnvMapperFromHWnd(HWND hWnd)
{
	irr::core::list<SEnvMapper>::Iterator it = EnvMap.begin();
	for (; it!= EnvMap.end(); ++it)
		if ((*it).hWnd == hWnd)
			return &(*it);

	return 0;
}


irr::CIrrDeviceWin32* getDeviceFromHWnd(HWND hWnd)
{
	irr::core::list<SEnvMapper>::Iterator it = EnvMap.begin();
	for (; it!= EnvMap.end(); ++it)
		if ((*it).hWnd == hWnd)
			return (*it).irrDev;

	return 0;
}


LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	#ifndef WM_MOUSEWHEEL
	#define WM_MOUSEWHEEL 0x020A
	#endif
	#ifndef WHEEL_DELTA
	#define WHEEL_DELTA 120
	#endif

	irr::CIrrDeviceWin32* dev = 0;
	irr::SEvent event;

	static irr::s32 ClickCount=0;
	if (GetCapture() != hWnd && ClickCount > 0)
		ClickCount = 0;


	struct messageMap
	{
		irr::s32 group;
		UINT winMessage;
		irr::s32 irrMessage;
	};

	static messageMap mouseMap[] =
	{
		{0, WM_LBUTTONDOWN, irr::EMIE_LMOUSE_PRESSED_DOWN},
		{1, WM_LBUTTONUP,   irr::EMIE_LMOUSE_LEFT_UP},
		{0, WM_RBUTTONDOWN, irr::EMIE_RMOUSE_PRESSED_DOWN},
		{1, WM_RBUTTONUP,   irr::EMIE_RMOUSE_LEFT_UP},
		{0, WM_MBUTTONDOWN, irr::EMIE_MMOUSE_PRESSED_DOWN},
		{1, WM_MBUTTONUP,   irr::EMIE_MMOUSE_LEFT_UP},
		{2, WM_MOUSEMOVE,   irr::EMIE_MOUSE_MOVED},
		{3, WM_MOUSEWHEEL,  irr::EMIE_MOUSE_WHEEL},
		{-1, 0, 0}
	};

	// handle grouped events
	messageMap * m = mouseMap;
	while ( m->group >=0 && m->winMessage != message )
		m += 1;

	if ( m->group >= 0 )
	{
		if ( m->group == 0 )	// down
		{
			ClickCount++;
			SetCapture(hWnd);
		}
		else
		if ( m->group == 1 )	// up
		{
			ClickCount--;
			if (ClickCount<1)
			{
				ClickCount=0;
				ReleaseCapture();
			}
		}

		event.EventType = irr::EET_MOUSE_INPUT_EVENT;
		event.MouseInput.Event = (irr::EMOUSE_INPUT_EVENT) m->irrMessage;
		event.MouseInput.X = (short)LOWORD(lParam);
		event.MouseInput.Y = (short)HIWORD(lParam);
		event.MouseInput.Shift = ((LOWORD(wParam) & MK_SHIFT) != 0);
		event.MouseInput.Control = ((LOWORD(wParam) & MK_CONTROL) != 0);
		// left and right mouse buttons
		event.MouseInput.ButtonStates = wParam & ( MK_LBUTTON | MK_RBUTTON);
		// middle and extra buttons
		if (wParam & MK_MBUTTON)
			event.MouseInput.ButtonStates |= irr::EMBSM_MIDDLE;
#if(_WIN32_WINNT >= 0x0500)
		if (wParam & MK_XBUTTON1)
			event.MouseInput.ButtonStates |= irr::EMBSM_EXTRA1;
		if (wParam & MK_XBUTTON2)
			event.MouseInput.ButtonStates |= irr::EMBSM_EXTRA2;
#endif
		event.MouseInput.Wheel = 0.f;

		// wheel
		if ( m->group == 3 )
		{
			POINT p; // fixed by jox
			p.x = 0; p.y = 0;
			ClientToScreen(hWnd, &p);
			event.MouseInput.X -= p.x;
			event.MouseInput.Y -= p.y;
			event.MouseInput.Wheel = ((irr::f32)((short)HIWORD(wParam))) / (irr::f32)WHEEL_DELTA;
		}

		dev = getDeviceFromHWnd(hWnd);
		if (dev)
		{
			dev->postEventFromUser(event);

			if ( event.MouseInput.Event == irr::EMIE_LMOUSE_PRESSED_DOWN )
			{
				irr::u32 clicks = dev->checkSuccessiveClicks(event.MouseInput.X, event.MouseInput.Y);
				if ( clicks == 2 )
				{
					event.MouseInput.Event = irr::EMIE_MOUSE_DOUBLE_CLICK;
					dev->postEventFromUser(event);
				}
				else if ( clicks == 3 )
				{
					event.MouseInput.Event = irr::EMIE_MOUSE_TRIPLE_CLICK;
					dev->postEventFromUser(event);
				}
			}
		}
		return 0;
	}

	switch (message)
	{
	case WM_PAINT:
		{
			PAINTSTRUCT ps;
			BeginPaint(hWnd, &ps);
			EndPaint(hWnd, &ps);
		}
		return 0;

	case WM_ERASEBKGND:
		return 0;

	case WM_SYSKEYDOWN:
	case WM_SYSKEYUP:
	case WM_KEYDOWN:
	case WM_KEYUP:
		{
			BYTE allKeys[256];

			event.EventType = irr::EET_KEY_INPUT_EVENT;
			event.KeyInput.Key = (irr::EKEY_CODE)wParam;
			event.KeyInput.PressedDown = (message==WM_KEYDOWN || message == WM_SYSKEYDOWN);
			dev = getDeviceFromHWnd(hWnd);

			WORD KeyAsc=0;
			GetKeyboardState(allKeys);
			ToAscii((UINT)wParam,(UINT)lParam,allKeys,&KeyAsc,0);

			event.KeyInput.Shift = ((allKeys[VK_SHIFT] & 0x80)!=0);
			event.KeyInput.Control = ((allKeys[VK_CONTROL] & 0x80)!=0);
			event.KeyInput.Char = (KeyAsc & 0x00ff); //KeyAsc >= 0 ? KeyAsc : 0;

			if (dev)
				dev->postEventFromUser(event);

			if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP)
				return DefWindowProc(hWnd, message, wParam, lParam);
			else
				return 0;
		}

	case WM_SIZE:
		{
			// resize
			dev = getDeviceFromHWnd(hWnd);
			if (dev)
				dev->OnResized();
		}
		return 0;

	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;

	case WM_SYSCOMMAND:
		// prevent screensaver or monitor powersave mode from starting
		if ((wParam & 0xFFF0) == SC_SCREENSAVE ||
			(wParam & 0xFFF0) == SC_MONITORPOWER)
			return 0;
		break;

	case WM_USER:
		event.EventType = irr::EET_USER_EVENT;
		event.UserEvent.UserData1 = (irr::s32)wParam;
		event.UserEvent.UserData2 = (irr::s32)lParam;
		dev = getDeviceFromHWnd(hWnd);

		if (dev)
			dev->postEventFromUser(event);

		return 0;
	}
	return DefWindowProc(hWnd, message, wParam, lParam);
}


namespace irr
{

//! constructor
CIrrDeviceWin32::CIrrDeviceWin32(const SIrrlichtCreationParameters& params)
: CIrrDeviceStub(params), HWnd(0), ChangedToFullScreen(false),
	IsNonNTWindows(false), Resized(false),
	ExternalWindow(false), Win32CursorControl(0)
{
	#ifdef _DEBUG
	setDebugName("CIrrDeviceWin32");
	#endif

	// get windows version and create OS operator
	core::stringc winversion;
	getWindowsVersion(winversion);
	Operator = new COSOperator(winversion.c_str());
	os::Printer::log(winversion.c_str(), ELL_INFORMATION);

	// get handle to exe file
	HINSTANCE hInstance = GetModuleHandle(0);

	// create the window if we need to and we do not use the null device
	if (!CreationParams.WindowId && CreationParams.DriverType != video::EDT_NULL)
	{
		const c8* ClassName = "CIrrDeviceWin32";

		// Register Class
		WNDCLASSEX wcex;
		wcex.cbSize		= sizeof(WNDCLASSEX);
		wcex.style		= CS_HREDRAW | CS_VREDRAW;
		wcex.lpfnWndProc	= WndProc;
		wcex.cbClsExtra		= 0;
		wcex.cbWndExtra		= 0;
		wcex.hInstance		= hInstance;
		wcex.hIcon		= NULL;
		wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
		wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
		wcex.lpszMenuName	= 0;
		wcex.lpszClassName	= ClassName;
		wcex.hIconSm		= 0;

		// if there is an icon, load it
		wcex.hIcon = (HICON)LoadImage(hInstance, "irrlicht.ico", IMAGE_ICON, 0,0, LR_LOADFROMFILE);

		RegisterClassEx(&wcex);

		// calculate client size

		RECT clientSize;
		clientSize.top = 0;
		clientSize.left = 0;
		clientSize.right = CreationParams.WindowSize.Width;
		clientSize.bottom = CreationParams.WindowSize.Height;

		DWORD style = WS_POPUP;

		if (!CreationParams.Fullscreen)
			style = WS_SYSMENU | WS_BORDER | WS_CAPTION | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;

		AdjustWindowRect(&clientSize, style, FALSE);

		const s32 realWidth = clientSize.right - clientSize.left;
		const s32 realHeight = clientSize.bottom - clientSize.top;

		s32 windowLeft = (GetSystemMetrics(SM_CXSCREEN) - realWidth) / 2;
		s32 windowTop = (GetSystemMetrics(SM_CYSCREEN) - realHeight) / 2;

		if (CreationParams.Fullscreen)
		{
			windowLeft = 0;
			windowTop = 0;
		}

		// create window

		HWnd = CreateWindow( ClassName, "", style, windowLeft, windowTop,
					realWidth, realHeight, NULL, NULL, hInstance, NULL);
		CreationParams.WindowId = HWnd;

		ShowWindow(HWnd, SW_SHOW);
		UpdateWindow(HWnd);

		// fix ugly ATI driver bugs. Thanks to ariaci
		MoveWindow(HWnd, windowLeft, windowTop, realWidth, realHeight, TRUE);
	}
	else if (CreationParams.WindowId)
	{
		// attach external window
		HWnd = static_cast<HWND>(CreationParams.WindowId);
		RECT r;
		GetWindowRect(HWnd, &r);
		CreationParams.WindowSize.Width = r.right - r.left;
		CreationParams.WindowSize.Height = r.bottom - r.top;
		CreationParams.Fullscreen = false;
		ExternalWindow = true;
	}

	// create cursor control

	Win32CursorControl = new CCursorControl(CreationParams.WindowSize, HWnd, CreationParams.Fullscreen);
	CursorControl = Win32CursorControl;

	// initialize doubleclicks with system values
	MouseMultiClicks.DoubleClickTime = GetDoubleClickTime();

	// create driver

	createDriver();

	if (VideoDriver)
		createGUIAndScene();

	// register environment

	SEnvMapper em;
	em.irrDev = this;
	em.hWnd = HWnd;
	EnvMap.push_back(em);

	// set this as active window
	SetActiveWindow(HWnd);
	SetForegroundWindow(HWnd);
}


//! destructor
CIrrDeviceWin32::~CIrrDeviceWin32()
{
	// unregister environment

	irr::core::list<SEnvMapper>::Iterator it = EnvMap.begin();
	for (; it!= EnvMap.end(); ++it)
	{
		if ((*it).hWnd == HWnd)
		{
			EnvMap.erase(it);
			break;
		}
	}

	if (ChangedToFullScreen)
		ChangeDisplaySettings(NULL,0);
}


//! create the driver
void CIrrDeviceWin32::createDriver()
{
	switch(CreationParams.DriverType)
	{
	case video::EDT_DIRECT3D8:
		#ifdef _IRR_COMPILE_WITH_DIRECT3D_8_

		VideoDriver = video::createDirectX8Driver(CreationParams.WindowSize, HWnd,
			CreationParams.Bits, CreationParams.Fullscreen, CreationParams.Stencilbuffer,
			FileSystem, false, CreationParams.HighPrecisionFPU, CreationParams.Vsync,
			CreationParams.AntiAlias);

		if (!VideoDriver)
		{
			os::Printer::log("Could not create DIRECT3D8 Driver.", ELL_ERROR);
		}
		#else
		os::Printer::log("DIRECT3D8 Driver was not compiled into this dll. Try another one.", ELL_ERROR);
		#endif // _IRR_COMPILE_WITH_DIRECT3D_8_

		break;

	case video::EDT_DIRECT3D9:
		#ifdef _IRR_COMPILE_WITH_DIRECT3D_9_

		VideoDriver = video::createDirectX9Driver(CreationParams.WindowSize, HWnd,
			CreationParams.Bits, CreationParams.Fullscreen, CreationParams.Stencilbuffer,
			FileSystem, false, CreationParams.HighPrecisionFPU, CreationParams.Vsync,
			CreationParams.AntiAlias);

		if (!VideoDriver)
		{
			os::Printer::log("Could not create DIRECT3D9 Driver.", ELL_ERROR);
		}
		#else
		os::Printer::log("DIRECT3D9 Driver was not compiled into this dll. Try another one.", ELL_ERROR);
		#endif // _IRR_COMPILE_WITH_DIRECT3D_9_

		break;

	case video::EDT_OPENGL:

		#ifdef _IRR_COMPILE_WITH_OPENGL_

		if (CreationParams.Fullscreen)
			switchToFullScreen(CreationParams.WindowSize.Width, CreationParams.WindowSize.Height, CreationParams.Bits);

		VideoDriver = video::createOpenGLDriver(CreationParams, FileSystem);
		if (!VideoDriver)
		{
			os::Printer::log("Could not create OpenGL driver.", ELL_ERROR);
		}
		#else
		os::Printer::log("OpenGL driver was not compiled in.", ELL_ERROR);
		#endif
		break;

	case video::EDT_SOFTWARE:

		#ifdef _IRR_COMPILE_WITH_SOFTWARE_
		if (CreationParams.Fullscreen)
			switchToFullScreen(CreationParams.WindowSize.Width, CreationParams.WindowSize.Height, CreationParams.Bits);

		VideoDriver = video::createSoftwareDriver(CreationParams.WindowSize, CreationParams.Fullscreen, FileSystem, this);
		#else
		os::Printer::log("Software driver was not compiled in.", ELL_ERROR);
		#endif

		break;

	case video::EDT_BURNINGSVIDEO:
		#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
		if (CreationParams.Fullscreen)
			switchToFullScreen(CreationParams.WindowSize.Width, CreationParams.WindowSize.Height, CreationParams.Bits);

		VideoDriver = video::createSoftwareDriver2(CreationParams.WindowSize, CreationParams.Fullscreen, FileSystem, this);
		#else
		os::Printer::log("Burning's Video driver was not compiled in.", ELL_ERROR);
		#endif
		break;

	case video::EDT_NULL:
		// create null driver
		VideoDriver = video::createNullDriver(FileSystem, CreationParams.WindowSize);
		break;

	default:
		os::Printer::log("Unable to create video driver of unknown type.", ELL_ERROR);
		break;
	}
}


//! runs the device. Returns false if device wants to be deleted
bool CIrrDeviceWin32::run()
{
	os::Timer::tick();

	MSG msg;

	bool quit = false;

	while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
	{
		TranslateMessage(&msg);

		if (ExternalWindow && msg.hwnd == HWnd)
			WndProc(HWnd, msg.message, msg.wParam, msg.lParam);
		else
			DispatchMessage(&msg);

		if (msg.message == WM_QUIT)
			quit = true;
	}

	if (!quit)
		resizeIfNecessary();

	if(!quit)
		pollJoysticks();

	_IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
	return !quit;
}


//! Pause the current process for the minimum time allowed only to allow other processes to execute
void CIrrDeviceWin32::yield()
{
	Sleep(1);
}

//! Pause execution and let other processes to run for a specified amount of time.
void CIrrDeviceWin32::sleep(u32 timeMs, bool pauseTimer)
{
	const bool wasStopped = Timer ? Timer->isStopped() : true;
	if (pauseTimer && !wasStopped)
		Timer->stop();

	Sleep(timeMs);

	if (pauseTimer && !wasStopped)
		Timer->start();
}


void CIrrDeviceWin32::resizeIfNecessary()
{
	if (!Resized)
		return;

	RECT r;
	GetClientRect(HWnd, &r);

	char tmp[255];

	if (r.right < 2 || r.bottom < 2)
	{
		sprintf(tmp, "Ignoring resize operation to (%ld %ld)", r.right, r.bottom);
		os::Printer::log(tmp);
	}
	else
	{
		sprintf(tmp, "Resizing window (%ld %ld)", r.right, r.bottom);
		os::Printer::log(tmp);

		getVideoDriver()->OnResize(irr::core::dimension2du((u32)r.right, (u32)r.bottom));
	}

	Resized = false;
}


//! sets the caption of the window
void CIrrDeviceWin32::setWindowCaption(const wchar_t* text)
{
	DWORD dwResult;
	if (IsNonNTWindows)
	{
		const core::stringc s = text;
#ifdef WIN64
		SetWindowTextA(HWnd, s.c_str());
#else
		SendMessageTimeout(HWnd, WM_SETTEXT, 0,
				reinterpret_cast<LPARAM>(s.c_str()),
				SMTO_ABORTIFHUNG, 2000, &dwResult);
#endif
	}
	else
	{
#ifdef WIN64
		SetWindowTextW(HWnd, text);
#else
		SendMessageTimeoutW(HWnd, WM_SETTEXT, 0,
				reinterpret_cast<LPARAM>(text),
				SMTO_ABORTIFHUNG, 2000, &dwResult);
#endif
	}
}


//! presents a surface in the client area
bool CIrrDeviceWin32::present(video::IImage* image, void* windowId, core::rect<s32>* src)
{
	HWND hwnd = HWnd;
	if ( windowId )
		hwnd = reinterpret_cast<HWND>(windowId);

	HDC dc = GetDC(hwnd);

	if ( dc )
	{
		RECT rect;
		GetClientRect(hwnd, &rect);
		const void* memory = (const void *)image->lock();

		BITMAPV4HEADER bi;
		ZeroMemory (&bi, sizeof(bi));
		bi.bV4Size          = sizeof(BITMAPINFOHEADER);
		bi.bV4BitCount      = (WORD)image->getBitsPerPixel();
		bi.bV4Planes        = 1;
		bi.bV4Width         = image->getDimension().Width;
		bi.bV4Height        = -((s32)image->getDimension().Height);
		bi.bV4V4Compression = BI_BITFIELDS;
		bi.bV4AlphaMask     = image->getAlphaMask();
		bi.bV4RedMask       = image->getRedMask();
		bi.bV4GreenMask     = image->getGreenMask();
		bi.bV4BlueMask      = image->getBlueMask();

		if ( src )
		{
			StretchDIBits(dc, 0,0, rect.right, rect.bottom,
					src->UpperLeftCorner.X, src->UpperLeftCorner.Y,
					src->getWidth(), src->getHeight(),
					memory, (const BITMAPINFO*)(&bi), DIB_RGB_COLORS, SRCCOPY);
		}
		else
		{
			StretchDIBits(dc, 0,0, rect.right, rect.bottom,
					0, 0, image->getDimension().Width, image->getDimension().Height,
					memory, (const BITMAPINFO*)(&bi), DIB_RGB_COLORS, SRCCOPY);
		}

		image->unlock();

		ReleaseDC(hwnd, dc);
	}
	return true;
}


//! notifies the device that it should close itself
void CIrrDeviceWin32::closeDevice()
{
	MSG msg;
	PeekMessage(&msg, NULL, WM_QUIT, WM_QUIT, PM_REMOVE);
	PostQuitMessage(0);
	PeekMessage(&msg, NULL, WM_QUIT, WM_QUIT, PM_REMOVE);
	DestroyWindow(HWnd);
}


//! returns if window is active. if not, nothing needs to be drawn
bool CIrrDeviceWin32::isWindowActive() const
{
	_IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
	return (GetActiveWindow() == HWnd);
}


//! returns if window has focus
bool CIrrDeviceWin32::isWindowFocused() const
{
	bool ret = (GetFocus() == HWnd);
	_IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
	return ret;
}


//! returns if window is minimized
bool CIrrDeviceWin32::isWindowMinimized() const
{
	WINDOWPLACEMENT plc;
	plc.length=sizeof(WINDOWPLACEMENT);
	bool ret=false;
	if (GetWindowPlacement(HWnd,&plc))
		ret=(plc.showCmd & SW_SHOWMINIMIZED)!=0;
	_IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
	return ret;
}


//! switches to fullscreen
bool CIrrDeviceWin32::switchToFullScreen(s32 width, s32 height, s32 bits)
{
	DEVMODE dm;
	memset(&dm, 0, sizeof(dm));
	dm.dmSize = sizeof(dm);
	// use default values from current setting
	EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm);
	dm.dmPelsWidth = width;
	dm.dmPelsHeight = height;
	dm.dmBitsPerPel = bits;
	dm.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY;

	LONG res = ChangeDisplaySettings(&dm, CDS_FULLSCREEN);
	if (res != DISP_CHANGE_SUCCESSFUL)
	{ // try again without forcing display frequency
		dm.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
		res = ChangeDisplaySettings(&dm, CDS_FULLSCREEN);
	}

	bool ret = false;
	switch(res)
	{
	case DISP_CHANGE_SUCCESSFUL:
		ChangedToFullScreen = true;
		ret = true;
		break;
	case DISP_CHANGE_RESTART:
		os::Printer::log("Switch to fullscreen: The computer must be restarted in order for the graphics mode to work.", ELL_ERROR);
		break;
	case DISP_CHANGE_BADFLAGS:
		os::Printer::log("Switch to fullscreen: An invalid set of flags was passed in.", ELL_ERROR);
		break;
	case DISP_CHANGE_BADPARAM:
		os::Printer::log("Switch to fullscreen: An invalid parameter was passed in. This can include an invalid flag or combination of flags.", ELL_ERROR);
		break;
	case DISP_CHANGE_FAILED:
		os::Printer::log("Switch to fullscreen: The display driver failed the specified graphics mode.", ELL_ERROR);
		break;
	case DISP_CHANGE_BADMODE:
		os::Printer::log("Switch to fullscreen: The graphics mode is not supported.", ELL_ERROR);
		break;
	default:
		os::Printer::log("An unknown error occured while changing to fullscreen.", ELL_ERROR);
		break;
	}
	_IRR_IMPLEMENT_MANAGED_MARSHALLING_BUGFIX;
	return ret;
}


//! returns the win32 cursor control
CIrrDeviceWin32::CCursorControl* CIrrDeviceWin32::getWin32CursorControl()
{
	return Win32CursorControl;
}


//! \return Returns a pointer to a list with all video modes supported
//! by the gfx adapter.
video::IVideoModeList* CIrrDeviceWin32::getVideoModeList()
{
	if (!VideoModeList.getVideoModeCount())
	{
		// enumerate video modes.
		DWORD i=0;
		DEVMODE mode;
		memset(&mode, 0, sizeof(mode));
		mode.dmSize = sizeof(mode);

		while (EnumDisplaySettings(NULL, i, &mode))
		{
			VideoModeList.addMode(core::dimension2d<u32>(mode.dmPelsWidth, mode.dmPelsHeight),
				mode.dmBitsPerPel);

			++i;
		}

		if (EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &mode))
			VideoModeList.setDesktop(mode.dmBitsPerPel, core::dimension2d<u32>(mode.dmPelsWidth, mode.dmPelsHeight));
	}

	return &VideoModeList;
}


void CIrrDeviceWin32::getWindowsVersion(core::stringc& out)
{
	OSVERSIONINFOEX osvi;
	BOOL bOsVersionInfoEx;

	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

	bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO*) &osvi);
	if (!bOsVersionInfoEx)
	{
		osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
		if (! GetVersionEx((OSVERSIONINFO *) &osvi))
			return;
	}

	switch (osvi.dwPlatformId)
	{
	case VER_PLATFORM_WIN32_NT:
		if (osvi.dwMajorVersion <= 4)
			out.append("Microsoft Windows NT ");
		else
		if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0)
			out.append("Microsoft Windows 2000 ");
		else
		if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1)
			out.append("Microsoft Windows XP ");
		else
		if (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0)
			out.append("Microsoft Windows Vista ");

		if (bOsVersionInfoEx)
		{
			#ifdef VER_SUITE_ENTERPRISE
			if (osvi.wProductType == VER_NT_WORKSTATION)
			{
#ifndef __BORLANDC__
				if( osvi.wSuiteMask & VER_SUITE_PERSONAL )
					out.append("Personal ");
				else
					out.append("Professional ");
#endif
			}
			else if (osvi.wProductType == VER_NT_SERVER)
			{
				if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
					out.append("DataCenter Server ");
				else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
					out.append("Advanced Server ");
				else
					out.append("Server ");
			}
			#endif
		}
		else
		{
			HKEY hKey;
			char szProductType[80];
			DWORD dwBufLen;

			RegOpenKeyEx( HKEY_LOCAL_MACHINE,
				"SYSTEM\\CurrentControlSet\\Control\\ProductOptions",
				0, KEY_QUERY_VALUE, &hKey );
			RegQueryValueEx( hKey, "ProductType", NULL, NULL,
				(LPBYTE) szProductType, &dwBufLen);
			RegCloseKey( hKey );

			if (lstrcmpi( "WINNT", szProductType) == 0 )
				out.append("Professional ");
			if (lstrcmpi( "LANMANNT", szProductType) == 0)
				out.append("Server ");
			if (lstrcmpi( "SERVERNT", szProductType) == 0)
				out.append("Advanced Server ");
		}

		// Display version, service pack (if any), and build number.

		char tmp[255];

		if (osvi.dwMajorVersion <= 4 )
		{
			sprintf(tmp, "version %ld.%ld %s (Build %ld)",
				osvi.dwMajorVersion,
				osvi.dwMinorVersion,
				osvi.szCSDVersion,
				osvi.dwBuildNumber & 0xFFFF);
		}
		else
		{
			sprintf(tmp, "%s (Build %ld)", osvi.szCSDVersion,
				osvi.dwBuildNumber & 0xFFFF);
		}

		out.append(tmp);
		break;

	case VER_PLATFORM_WIN32_WINDOWS:

		IsNonNTWindows = true;

		if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0)
		{
			out.append("Microsoft Windows 95 ");
			if ( osvi.szCSDVersion[1] == 'C' || osvi.szCSDVersion[1] == 'B' )
				out.append("OSR2 " );
		}

		if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
		{
			out.append("Microsoft Windows 98 ");
			if ( osvi.szCSDVersion[1] == 'A' )
				out.append( "SE " );
		}

		if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
			out.append("Microsoft Windows Me ");

		break;

	case VER_PLATFORM_WIN32s:

		IsNonNTWindows = true;
		out.append("Microsoft Win32s ");
		break;
	}
}

//! Notifies the device, that it has been resized
void CIrrDeviceWin32::OnResized()
{
	Resized = true;
}

//! Sets if the window should be resizable in windowed mode.
void CIrrDeviceWin32::setResizable(bool resize)
{
	if (ExternalWindow || !getVideoDriver() || CreationParams.Fullscreen)
		return;

	LONG_PTR style = WS_POPUP;

	if (!resize)
		style = WS_SYSMENU | WS_BORDER | WS_CAPTION | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
	else
		style = WS_THICKFRAME | WS_SYSMENU | WS_CAPTION | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;

	if (!SetWindowLongPtr(HWnd, GWL_STYLE, style))
		os::Printer::log("Could not change window style.");

	RECT clientSize;
	clientSize.top = 0;
	clientSize.left = 0;
	clientSize.right = getVideoDriver()->getScreenSize().Width;
	clientSize.bottom = getVideoDriver()->getScreenSize().Height;

	AdjustWindowRect(&clientSize, style, FALSE);

	const s32 realWidth = clientSize.right - clientSize.left;
	const s32 realHeight = clientSize.bottom - clientSize.top;

	const s32 windowLeft = (GetSystemMetrics(SM_CXSCREEN) - realWidth) / 2;
	const s32 windowTop = (GetSystemMetrics(SM_CYSCREEN) - realHeight) / 2;

	SetWindowPos(HWnd, HWND_TOP, windowLeft, windowTop, realWidth, realHeight,
		SWP_FRAMECHANGED | SWP_NOMOVE | SWP_SHOWWINDOW);
}


//! Minimizes the window.
void CIrrDeviceWin32::minimizeWindow()
{
	WINDOWPLACEMENT wndpl;
	wndpl.length = sizeof(WINDOWPLACEMENT);
	GetWindowPlacement(HWnd, &wndpl);
	wndpl.showCmd = SW_SHOWMINNOACTIVE;
	SetWindowPlacement(HWnd, &wndpl);
}


bool CIrrDeviceWin32::activateJoysticks(core::array<SJoystickInfo> & joystickInfo)
{
#if defined _IRR_COMPILE_WITH_JOYSTICK_EVENTS_
	joystickInfo.clear();
	ActiveJoysticks.clear();

	const u32 numberOfJoysticks = ::joyGetNumDevs();
	JOYINFOEX info;
	info.dwSize = sizeof(info);
	info.dwFlags = JOY_RETURNALL;

	JoystickInfo activeJoystick;
	SJoystickInfo returnInfo;

	joystickInfo.reallocate(numberOfJoysticks);
	ActiveJoysticks.reallocate(numberOfJoysticks);

	u32 joystick = 0;
	for(; joystick < numberOfJoysticks; ++joystick)
	{
		if(JOYERR_NOERROR == joyGetPosEx(joystick, &info)
			&&
			JOYERR_NOERROR == joyGetDevCaps(joystick,
											&activeJoystick.Caps,
											sizeof(activeJoystick.Caps)))
		{
			activeJoystick.Index = joystick;
			ActiveJoysticks.push_back(activeJoystick);

			returnInfo.Joystick = (u8)joystick;
			returnInfo.Axes = activeJoystick.Caps.wNumAxes;
			returnInfo.Buttons = activeJoystick.Caps.wNumButtons;
			returnInfo.Name = activeJoystick.Caps.szPname;
			returnInfo.PovHat = ((activeJoystick.Caps.wCaps & JOYCAPS_HASPOV) == JOYCAPS_HASPOV)
								? SJoystickInfo::POV_HAT_PRESENT : SJoystickInfo::POV_HAT_ABSENT;

			joystickInfo.push_back(returnInfo);
		}
	}

	for(joystick = 0; joystick < joystickInfo.size(); ++joystick)
	{
		char logString[256];
		(void)sprintf(logString, "Found joystick %d, %d axes, %d buttons '%s'",
			joystick, joystickInfo[joystick].Axes,
			joystickInfo[joystick].Buttons, joystickInfo[joystick].Name.c_str());
		os::Printer::log(logString, ELL_INFORMATION);
	}

	return true;
#else
	return false;
#endif // _IRR_COMPILE_WITH_JOYSTICK_EVENTS_
}

void CIrrDeviceWin32::pollJoysticks()
{
#if defined _IRR_COMPILE_WITH_JOYSTICK_EVENTS_
	if(0 == ActiveJoysticks.size())
		return;

	u32 joystick;
	JOYINFOEX info;
	info.dwSize = sizeof(info);
	info.dwFlags = JOY_RETURNALL;

	for(joystick = 0; joystick < ActiveJoysticks.size(); ++joystick)
	{
		if(JOYERR_NOERROR == joyGetPosEx(ActiveJoysticks[joystick].Index, &info))
		{
			SEvent event;
			const JOYCAPS & caps = ActiveJoysticks[joystick].Caps;

			event.EventType = irr::EET_JOYSTICK_INPUT_EVENT;
			event.JoystickEvent.Joystick = (u8)joystick;

			event.JoystickEvent.POV = (u16)info.dwPOV;
			if(event.JoystickEvent.POV > 35900)
				event.JoystickEvent.POV = 65535;

			for(int axis = 0; axis < SEvent::SJoystickEvent::NUMBER_OF_AXES; ++axis)
				event.JoystickEvent.Axis[axis] = 0;

			switch(caps.wNumAxes)
			{
			default:
			case 6:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_V] =
					(s16)((65535 * (info.dwVpos - caps.wVmin)) / (caps.wVmax - caps.wVmin) - 32768);

			case 5:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_U] =
					(s16)((65535 * (info.dwUpos - caps.wUmin)) / (caps.wUmax - caps.wUmin) - 32768);

			case 4:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_R] =
					(s16)((65535 * (info.dwRpos - caps.wRmin)) / (caps.wRmax - caps.wRmin) - 32768);

			case 3:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_Z] =
					(s16)((65535 * (info.dwZpos - caps.wZmin)) / (caps.wZmax - caps.wZmin) - 32768);

			case 2:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_Y] =
					(s16)((65535 * (info.dwYpos - caps.wYmin)) / (caps.wYmax - caps.wYmin) - 32768);

			case 1:
				event.JoystickEvent.Axis[SEvent::SJoystickEvent::AXIS_X] =
					(s16)((65535 * (info.dwXpos - caps.wXmin)) / (caps.wXmax - caps.wXmin) - 32768);
			}

			event.JoystickEvent.ButtonStates = info.dwButtons;

			(void)postEventFromUser(event);
		}
	}
#endif // _IRR_COMPILE_WITH_JOYSTICK_EVENTS_
}

//! Set the current Gamma Value for the Display
bool CIrrDeviceWin32::setGammaRamp( f32 red, f32 green, f32 blue, f32 brightness, f32 contrast )
{
	bool r;
	u16 ramp[3][256];

	calculateGammaRamp( ramp[0], red, brightness, contrast );
	calculateGammaRamp( ramp[1], green, brightness, contrast );
	calculateGammaRamp( ramp[2], blue, brightness, contrast );

	HDC dc = GetDC(0);
	r = SetDeviceGammaRamp ( dc, ramp ) == TRUE;
	ReleaseDC(HWnd, dc);
	return r;
}

//! Get the current Gamma Value for the Display
bool CIrrDeviceWin32::getGammaRamp( f32 &red, f32 &green, f32 &blue, f32 &brightness, f32 &contrast )
{
	bool r;
	u16 ramp[3][256];

	HDC dc = GetDC(0);
	r = GetDeviceGammaRamp ( dc, ramp ) == TRUE;
	ReleaseDC(HWnd, dc);

	if ( r )
	{
		calculateGammaFromRamp(red, ramp[0]);
		calculateGammaFromRamp(green, ramp[1]);
		calculateGammaFromRamp(blue, ramp[2]);
	}

	brightness = 0.f;
	contrast = 0.f;

	return r;

}

extern "C" IRRLICHT_API IrrlichtDevice* IRRCALLCONV createDeviceEx(
	const SIrrlichtCreationParameters& parameters)
{
	CIrrDeviceWin32* dev = new CIrrDeviceWin32(parameters);

	if (dev && !dev->getVideoDriver() && parameters.DriverType != video::EDT_NULL)
	{
		dev->closeDevice(); // destroy window
		dev->run(); // consume quit message
		dev->drop();
		dev = 0;
	}

	return dev;
}


} // end namespace

#endif // _IRR_USE_WINDOWS_DEVICE_