/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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 3 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, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//																			 //
//	plDetailCurveCtrl Class Functions										 //
//	Custom Win32 Control class for drawing the detail map opacity curve so	 //
//	the artists can figure out what the hell is going on.					 //
//	Cyan, Inc.																 //
//																			 //
//	To use:																	 //
//		1. Create a new plDetailCurveCtrl, giving it a parent window and a	 //
//		   client rect.														 //
//		2. Set the start and end percentages, along with the start and end	 //
//		   opacities.														 //
//																			 //
//// Version History //////////////////////////////////////////////////////////
//																			 //
//	10.1.2001 mcn - Created.												 //
//																			 //
///////////////////////////////////////////////////////////////////////////////

#include "hsTypes.h"
#include "plDetailCurveCtrl.h"
#include "resource.h"


//// Static Stuff /////////////////////////////////////////////////////////////

int			plDetailCurveCtrl::fClassRefCnt = 0;
HINSTANCE	plDetailCurveCtrl::fInstance = NULL;
HBITMAP		plDetailCurveCtrl::fBgndImage = NULL;
HFONT		plDetailCurveCtrl::fFont = NULL;

#ifdef MCN_TWO_GRAPH_MODE
HBITMAP		plDetailCurveCtrl::fBgndImage2 = NULL;
bool		plDetailCurveCtrl::fXAsMipmapLevel = false;
#endif

const char	gCtrlClassName[] = "DetailCurveClass";

#define kHiResStep	0.01f


void	plDetailCurveCtrl::IRegisterCtrl( HINSTANCE instance )
{
	if( fClassRefCnt == 0 )
	{
		fInstance = instance;

		WNDCLASSEX	clInfo;

		memset( &clInfo, 0, sizeof( clInfo ) );
		clInfo.cbSize = sizeof( clInfo );
		clInfo.style = CS_OWNDC | CS_NOCLOSE;
		clInfo.lpfnWndProc = (WNDPROC)IWndProc;
		clInfo.cbClsExtra = 0;
		clInfo.cbWndExtra = 0;
		clInfo.hInstance = fInstance;
		clInfo.hIcon = NULL;
		clInfo.hCursor = LoadCursor( NULL, IDC_CROSS );
		clInfo.hbrBackground = NULL;
		clInfo.lpszMenuName = NULL;
		clInfo.lpszClassName = gCtrlClassName;
		clInfo.hIconSm = NULL;

		RegisterClassEx( &clInfo );

		fBgndImage = (HBITMAP)LoadImage( fInstance, MAKEINTRESOURCE( IDB_DETAILBGND ), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR );
#ifdef MCN_TWO_GRAPH_MODE
		fBgndImage2 = (HBITMAP)LoadImage( fInstance, MAKEINTRESOURCE( IDB_DETAILBGND2 ), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR );
#endif

		HDC hDC = GetDC( NULL );
		fFont = CreateFont( -MulDiv( 8, GetDeviceCaps( hDC, LOGPIXELSY ), 72 ), 0, 0, 0, 0, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, 
							CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH, "Arial" );
		ReleaseDC( NULL, hDC );
	}

	fClassRefCnt++;
}

void	plDetailCurveCtrl::IUnregisterCtrl( void )
{
	fClassRefCnt--;
	if( fClassRefCnt == 0 )
	{
		UnregisterClass( gCtrlClassName, fInstance );
		if( fFont != NULL )
			DeleteObject( fFont );
	}
}

//// Constructor & Destructor /////////////////////////////////////////////////

plDetailCurveCtrl::plDetailCurveCtrl( HWND parentWnd, WPARAM id, RECT *clientRect, HINSTANCE instance )
{
	// Class init
	if( instance == NULL )
		instance = (HINSTANCE)GetWindowLong( parentWnd, GWL_HINSTANCE );
	IRegisterCtrl( instance );

	// Per-object init
	fDblDC = NULL;
	fDblBitmap = NULL;
	fStartPercent = 0;
	fStartOpac = 0;
	fEndPercent = 1.f;
	fEndOpac = 1.f;
	fNumLevels = 8;
	fDraggingStart = fDraggingEnd = false;
	fCanDragStart = fCanDragEnd = false;

	// Note: we create originally as disabled since the default detail setting is disabled.
	// The MAX Update stuff should change this if necessary after we're created
	fHWnd = ::CreateWindowEx( WS_EX_CLIENTEDGE, gCtrlClassName, "Detail Curve", WS_CHILD | WS_VISIBLE | WS_BORDER | WS_DISABLED,
							clientRect->left, clientRect->top, clientRect->right - clientRect->left,
							clientRect->bottom - clientRect->top,
							parentWnd, (HMENU)id, instance, 0 );
	if( fHWnd == NULL )
		return;

	SetWindowLong( fHWnd, GWL_USERDATA, (LONG)this );
}

plDetailCurveCtrl::~plDetailCurveCtrl()
{
	if( fDblDC != NULL )
	{
		SelectObject( fDblDC, (HBITMAP)NULL );
		DeleteObject( fDblBitmap );
		DeleteDC( fDblDC );
	}

	if( fWhiteBrush != NULL )
		DeleteObject( fWhiteBrush );
	if( fBluePen != NULL )
		DeleteObject( fBluePen );
	if( fLiteBluePen != NULL )
		DeleteObject( fLiteBluePen );
	if( fBlueBrush != NULL )
		DeleteObject( fBlueBrush );

//	DestroyWindow( fHWnd );
	IUnregisterCtrl();
}

//// IInitDblBuffer ///////////////////////////////////////////////////////////
//	Note: For some strange reason, grabbing the HDC of the window doesn't do
//	any good, 'cause it's black-and-white (right, THAT makes sense). Grabbing
//	the desktop DC works, however.

void	plDetailCurveCtrl::IInitDblBuffer( void )
{
	if( fDblDC == NULL )
	{
		int		width, height;
		RECT	r;
		HDC		desk = GetDC( NULL );

		GetClientRect( fHWnd, &r );
		width = r.right - r.left;
		height = r.bottom - r.top;

		fDblDC = CreateCompatibleDC( desk );
		fDblBitmap = CreateCompatibleBitmap( desk/*fDblDC*/, width, height );
		SelectObject( fDblDC, fDblBitmap );
		ReleaseDC( NULL, desk );

		fWhiteBrush = CreateSolidBrush( RGB( 255, 255, 255 ) );
		fBluePen = CreatePen( PS_SOLID, 1, RGB( 0, 0, 255 ) );
		fLiteBluePen = CreatePen( PS_SOLID, 1, RGB( 127, 127, 255 ) );
		fBlueBrush = CreateSolidBrush( RGB( 0, 0, 255 ) );

		IRefreshDblBuffer();
	}
}

//// IRefreshDblBuffer ////////////////////////////////////////////////////////

void	plDetailCurveCtrl::IRefreshDblBuffer( void )
{
	HDC			hBgndDC;
	RECT		clientRect, r;
	SIZE		bgndSize;
	int			width, height, x, y;
	HPEN		oldPen;
	BITMAPINFO	bmpInfo;
	POINT		pt1, pt2;


	IInitDblBuffer();

	GetClientRect( fHWnd, &clientRect );
	width = clientRect.right - clientRect.left;
	height = clientRect.bottom - clientRect.top;

	if( fDblBitmap != NULL )
	{
		FillRect( fDblDC, &clientRect, fWhiteBrush );

		if( fBgndImage != NULL )
		{

			// Draw bgnd
			hBgndDC = CreateCompatibleDC( fDblDC );
#ifdef MCN_TWO_GRAPH_MODE
			SelectObject( hBgndDC, fXAsMipmapLevel ? fBgndImage2 : fBgndImage );
#else
			SelectObject( hBgndDC, fBgndImage );
#endif

			bmpInfo.bmiHeader.biSize = sizeof( bmpInfo.bmiHeader );
			bmpInfo.bmiHeader.biBitCount = 0;
			GetDIBits( hBgndDC, fBgndImage, 0, 0, NULL, &bmpInfo, DIB_RGB_COLORS );
			bgndSize.cx = bmpInfo.bmiHeader.biWidth;
			bgndSize.cy = bmpInfo.bmiHeader.biHeight;
			x = ( width - bgndSize.cx ) >> 1;
			y = ( height - bgndSize.cy ) >> 1;

			BitBlt( fDblDC, x, y, bgndSize.cx, bgndSize.cy, hBgndDC, 0, 0, SRCCOPY );
			SelectObject( hBgndDC, (HBITMAP)NULL );
			DeleteDC( hBgndDC );

			/// Draw graph
			if( IsWindowEnabled( fHWnd ) )
			{
				bgndSize.cx -= 8;
				oldPen = (HPEN)SelectObject( fDblDC, fLiteBluePen );

				/// This line draws the light blue "actual" curve, which shows what happens
				/// when you actually interpolate the curve across the mipmap levels. It's
				/// more accurate in that it shows the actual values computed for each level,
				/// but less accurate because it doesn't take into account mipmap sampling
				/// and such. Given the latter, we leave it out (for now) to avoid confusing
				/// the artists.
//				IDrawCurve( fDblDC, true, x, y, &bgndSize );

				SelectObject( fDblDC, fBluePen );
				IDrawCurve( fDblDC, false, x, y, &bgndSize );

				SelectObject( fDblDC, oldPen );

				if( fStartPercent == 0.07f && fStartOpac == 0.23f && fEndPercent == 0.19f && fEndOpac == 0.79f )
				{
					const char	str[] = "\x48\x61\x70\x70\x79\x20\x62\x64\x61\x79\x20\x74\x6f\x20\x6d\x63\x6e\x21";
					SetBkMode( fDblDC, TRANSPARENT );
					SetTextColor( fDblDC, RGB( 0, 0, 255 ) );
					SelectObject( fDblDC, fFont );
					TextOut( fDblDC, x, y + bgndSize.cy - 10, str, strlen( str ) );
				}

				// Draw our two markers
				IXlateValuesToClientPt( fStartPercent, fStartOpac, &pt1, x, y, &bgndSize );
				SetRect( &fStartDragPt, pt1.x - 4, pt1.y - 4, pt1.x + 4, pt1.y + 4 );
				r = fStartDragPt;
				if( !fCanDragStart )
					InflateRect( &r, -2, -2 );
				FillRect( fDblDC, &r, fBlueBrush );

				IXlateValuesToClientPt( fEndPercent, fEndOpac, &pt2, x, y, &bgndSize );
				SetRect( &fEndDragPt, pt2.x - 4, pt2.y - 4, pt2.x + 4, pt2.y + 4 );
				r = fEndDragPt;
				if( !fCanDragEnd )
					InflateRect( &r, -2, -2 );
				FillRect( fDblDC, &r, fBlueBrush );
			}
		}
	}
}

//// IDrawCurve ///////////////////////////////////////////////////////////////
//	Draw the damned curve.

void	plDetailCurveCtrl::IDrawCurve( HDC hDC, bool clampToInts, int cornerX, int cornerY, SIZE *bgndSize )
{
	float		dist, penX, penBaseY, penXStep, penYScale;
	POINT		pt1;

	
	// Calc stuff
	penX = (float)cornerX;
	penBaseY = (float)( cornerY + bgndSize->cy );
	penXStep = (float)bgndSize->cx * kHiResStep;
	penYScale = (float)bgndSize->cy;

	// Draw curve
	pt1.x = (int)penX;
	pt1.y = (int)( penBaseY - penYScale * fStartOpac );

	float	artificialBias = 1.f / (float)fNumLevels;	//	So we never get a howFar less than 0
	float	artificialMaxDist = 1.f - artificialBias;

	for( dist = 0.f; dist <= 1.f; dist += kHiResStep )
	{
		float opac = IXlateDistToValue( dist, clampToInts );

		if( dist == 0.f )
			MoveToEx( hDC, (int)penX, (int)( penBaseY - penYScale * opac ), NULL );
		else
			LineTo( hDC, (int)penX, (int)( penBaseY - penYScale * opac ) );

		penX += penXStep;
	}
}

//// IXlateDistToValue ////////////////////////////////////////////////////////
//	I.E. from distance across graph to distance up on graph (percentage-wise)

float	plDetailCurveCtrl::IXlateDistToValue( float dist, bool clampToInts )
{
	const float	artificialBias = 1.f / (float)fNumLevels;	//	So we never get a howFar less than 0
	const float	artificialMaxDist = 1.f - artificialBias;
	float		howFar, opac;


	howFar = IXlateDistToX( dist, clampToInts );

	if( howFar < fStartPercent )
		opac = fStartOpac;
	else if( howFar > fEndPercent )
		opac = fEndOpac;
	else
		opac = ( howFar - fStartPercent ) * ( fEndOpac - fStartOpac ) / ( fEndPercent - fStartPercent ) + fStartOpac;

	return opac;
}

//// IXlateDistToX ////////////////////////////////////////////////////////////
//	I.E. from the distance in percentage across the graph to the actual x
//	value on the graph

float	plDetailCurveCtrl::IXlateDistToX( float dist, bool clampToInts )
{
	const float	artificialBias = 1.f / (float)fNumLevels;	//	So we never get a howFar less than 0
	const float	artificialMaxDist = 1.f - artificialBias;
	float		howFar;


#ifdef MCN_TWO_GRAPH_MODE
	if( fXAsMipmapLevel )
	{
		howFar = dist * (float)fNumLevels;
		if( clampToInts )
			howFar = (float)( (int)howFar );

		howFar /= (float)fNumLevels;
		return howFar;
	}
#endif

	if( dist == 0.f )
		howFar = 0.f;
	else
	{
		howFar = 1.f - ( ( 1.f - dist ) * artificialMaxDist );
		howFar = ( (float)fNumLevels - 1.f / howFar );
		if( howFar < 0.f )
			howFar = 0.f;
		else if( howFar > (float)fNumLevels - 1.f )
			howFar = (float)fNumLevels - 1.f;

		if( clampToInts )
			howFar = (float)( (int)howFar );

		howFar /= (float)fNumLevels - 1.f;
	}

	return howFar;
}

//// IXlateXToDist ////////////////////////////////////////////////////////////
//	I.E. from the actual x value of the graph to the actual distance in
//	percentage across the graph.

float	plDetailCurveCtrl::IXlateXToDist( float howFar )
{
	const float	artificialBias = 1.f / (float)fNumLevels;	//	So we never get a howFar less than 0
	const float	artificialMaxDist = 1.f - artificialBias;
	float		dist;


#ifdef MCN_TWO_GRAPH_MODE
	if( fXAsMipmapLevel )
	{
		return howFar;
	}
#endif

	if( howFar == 0.f )
		dist = 0.f;
	else
	{
		howFar *= (float)fNumLevels - 1.f;
		howFar = 1.f / ( (float)fNumLevels - howFar );
		howFar = ( ( howFar - 1.f ) / artificialMaxDist ) + 1.f;
	}

	return howFar;
}

//// IXlateValuesToClientPt ///////////////////////////////////////////////////
//	I.E. from graph x,y values to client coordinates

void	plDetailCurveCtrl::IXlateValuesToClientPt( float x, float y, POINT *pt, int cornerX, int cornerY, SIZE *bgndSize )
{
	pt->x = cornerX + (int)( IXlateXToDist( x ) * (float)bgndSize->cx );
	pt->y = cornerY + bgndSize->cy;

	pt->y -= (int)( (float)bgndSize->cy * y );
}

//// IMapMouseToValues ////////////////////////////////////////////////////////
//	Map mouse x,y coordinates in clientspace to graph values. If the last param
//	is true, maps to the start point, else maps to the end point

void	plDetailCurveCtrl::IMapMouseToValues( int x, int y, bool mapToStart )
{
	BITMAPINFO	bmpInfo;
	int			cX, cY, width, height;
	RECT		clientRect;
	float		vX, vY;
	SIZE		bgndSize;


	if( fBgndImage == NULL || fDblDC == NULL || !IsWindowEnabled( fHWnd ) )
		return;

	GetClientRect( fHWnd, &clientRect );
	width = clientRect.right - clientRect.left;
	height = clientRect.bottom - clientRect.top;

	bmpInfo.bmiHeader.biSize = sizeof( bmpInfo.bmiHeader );
	bmpInfo.bmiHeader.biBitCount = 0;
	GetDIBits( fDblDC, fBgndImage, 0, 0, NULL, &bmpInfo, DIB_RGB_COLORS );
	bgndSize.cx = bmpInfo.bmiHeader.biWidth;
	bgndSize.cy = bmpInfo.bmiHeader.biHeight;
	cX = ( width - bgndSize.cx ) >> 1;
	cY = ( height - bgndSize.cy ) >> 1;

	bgndSize.cx -= 8;

	// Xlate to graph space and clamp
	x -= cX;
	y = bgndSize.cy - ( y - cY );
	if( x < 0 )
		x = 0;
	else if( x > bgndSize.cx )
		x = bgndSize.cx;
	if( y < 0 )
		y = 0;
	else if( y > bgndSize.cy )
		y = bgndSize.cy;

	vX = IXlateDistToX( (float)x / (float)bgndSize.cx, false );
	vY = (float)y / (float)bgndSize.cy;

	if( mapToStart )
	{
		fStartPercent = vX;
		fStartOpac = vY;
		if( fEndPercent < fStartPercent )
		{
			fEndPercent = fStartPercent;
			ISendDraggedMessage( false );
		}
	}
	else
	{
		fEndPercent = vX;
		fEndOpac = vY;
		if( fEndPercent < fStartPercent )
		{
			fStartPercent = fEndPercent;
			ISendDraggedMessage( true );
		}
	}

	IRefreshDblBuffer();
	InvalidateRect( fHWnd, NULL, false );
	RedrawWindow( fHWnd, NULL, NULL, RDW_UPDATENOW );

	ISendDraggedMessage( mapToStart );
}

//// ISendDraggedMessage //////////////////////////////////////////////////////

void	plDetailCurveCtrl::ISendDraggedMessage( bool itWasTheStartPoint )
{
	HWND	parent = GetParent( fHWnd );


	if( parent == NULL )
		return;

	SendMessage( parent, PL_DC_POINT_DRAGGED, itWasTheStartPoint ? PL_DC_START_POINT : PL_DC_END_POINT,
					(LPARAM)this );
}

//// SetStart/EndPoint ////////////////////////////////////////////////////////

void	plDetailCurveCtrl::SetStartPoint( float percentLevel, float opacity )
{
	fStartPercent = percentLevel;
	fStartOpac = opacity;
	IRefreshDblBuffer();
	InvalidateRect( fHWnd, NULL, false );
}

void	plDetailCurveCtrl::SetEndPoint( float percentLevel, float opacity )
{
	fEndPercent = percentLevel;
	fEndOpac = opacity;
	IRefreshDblBuffer();
	InvalidateRect( fHWnd, NULL, false );
}

void	plDetailCurveCtrl::SetNumLevels( int numLevels )
{
	fNumLevels = numLevels;
	IRefreshDblBuffer();
	InvalidateRect( fHWnd, NULL, false );
}

//// IWndProc /////////////////////////////////////////////////////////////////

LRESULT CALLBACK	plDetailCurveCtrl::IWndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
	HDC				hDC;
	RECT			clientRect;
	int				width, height;
	PAINTSTRUCT		pInfo;
	POINT			pt;


	plDetailCurveCtrl	*ctrl = (plDetailCurveCtrl *)GetWindowLong( hWnd, GWL_USERDATA );
	GetClientRect( hWnd, &clientRect );
	width = clientRect.right - clientRect.left;
	height = clientRect.bottom - clientRect.top;

	switch( msg )
	{
		case WM_CREATE:
			return 0;

		case WM_ENABLE:
			if( ctrl != NULL )
				ctrl->IRefreshDblBuffer();
			return 0;

		case WM_PAINT:
			BeginPaint( hWnd, &pInfo );
			hDC = (HDC)pInfo.hdc;

			if( ctrl != NULL )
			{
				if( ctrl->fDblDC == NULL )
					ctrl->IInitDblBuffer();

				BitBlt( hDC, 0, 0, width, height, ctrl->fDblDC, 0, 0, SRCCOPY );
			}

			EndPaint( hWnd, &pInfo );
			return 0;

		case WM_ERASEBKGND:
			return TRUE;

		case WM_LBUTTONDOWN:
			if( ctrl != NULL && !ctrl->fDraggingStart && !ctrl->fDraggingEnd )
			{
				pt.x = LOWORD( lParam );
				pt.y = HIWORD( lParam );
				if( PtInRect( &ctrl->fStartDragPt, pt ) )
				{
					if( !ctrl->fCanDragStart && !ctrl->fCanDragEnd )
						SetCapture( hWnd );
					ctrl->fDraggingStart = true;
				}
				else if( PtInRect( &ctrl->fEndDragPt, pt ) )
				{
					if( !ctrl->fCanDragStart && !ctrl->fCanDragEnd )
						SetCapture( hWnd );
					ctrl->fDraggingEnd = true;
				}
			}
			return 0;

		case WM_MOUSEMOVE:
			if( ctrl != NULL )
			{
				pt.x = LOWORD( lParam );
				pt.y = HIWORD( lParam );

				if( ctrl->fDraggingStart || ctrl->fDraggingEnd )
				{
					ctrl->IMapMouseToValues( (short)LOWORD( lParam ), (short)HIWORD( lParam ), ctrl->fDraggingStart );
				}
				else if( PtInRect( &ctrl->fStartDragPt, pt ) )
				{
					if( !ctrl->fCanDragStart )
					{
						ctrl->fCanDragStart = true;
						ctrl->fCanDragEnd = false;
						SetCapture( hWnd );
						ctrl->IRefreshDblBuffer();
						InvalidateRect( hWnd, NULL, false );
					}
				}
				else if( PtInRect( &ctrl->fEndDragPt, pt ) )
				{
					if( !ctrl->fCanDragEnd )
					{
						ctrl->fCanDragEnd = true;
						ctrl->fCanDragStart = false;
						SetCapture( hWnd );
						ctrl->IRefreshDblBuffer();
						InvalidateRect( hWnd, NULL, false );
					}
				}
				else if( ctrl->fCanDragStart || ctrl->fCanDragEnd )
				{
					ctrl->fCanDragStart = false;
					ctrl->fCanDragEnd = false;
					ReleaseCapture();
					ctrl->IRefreshDblBuffer();
					InvalidateRect( hWnd, NULL, false );
				}
			}
			return 0;

		case WM_LBUTTONUP:
			if( ctrl != NULL && ( ctrl->fDraggingStart || ctrl->fDraggingEnd ) )
			{
				if( !ctrl->fCanDragStart && !ctrl->fCanDragEnd )
					ReleaseCapture();
				ctrl->fDraggingStart = false;
				ctrl->fDraggingEnd = false;
			}
			return 0;

#ifdef MCN_TWO_GRAPH_MODE
		case WM_RBUTTONDOWN:
			fXAsMipmapLevel = !fXAsMipmapLevel;
			ctrl->IRefreshDblBuffer();
			InvalidateRect( hWnd, NULL, false );
			return 0;
#endif

		case WM_DESTROY:
			delete ctrl;
			SetWindowLong( hWnd, GWL_USERDATA, 0 );
			return 0;

		default:
			return DefWindowProc( hWnd, msg, wParam, lParam );
	}
}