source/gdi/bitmap.cxx

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#include <rtl/crc.h>
#include <tools/stream.hxx>
#include <tools/poly.hxx>
#include <tools/rc.h>

#include <vcl/salbtype.hxx>
#include <vcl/bmpacc.hxx>
#include <vcl/outdev.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/svapp.hxx>
#include <vcl/image.hxx>

#include <impbmp.hxx>
#include <salbmp.hxx>

// ----------
// - Bitmap -
// ----------

Bitmap::Bitmap() :
	mpImpBmp( NULL )
{
}

// ------------------------------------------------------------------

Bitmap::Bitmap( const ResId& rResId ) :
	mpImpBmp( NULL )
{
	const BitmapEx aBmpEx( rResId );

	if( !aBmpEx.IsEmpty() )
		*this = aBmpEx.GetBitmap();
}

// ------------------------------------------------------------------

Bitmap::Bitmap( const Bitmap& rBitmap ) :
	maPrefMapMode	( rBitmap.maPrefMapMode ),
	maPrefSize		( rBitmap.maPrefSize )
{
	mpImpBmp = rBitmap.mpImpBmp;

	if ( mpImpBmp )
		mpImpBmp->ImplIncRefCount();
}

// ------------------------------------------------------------------

Bitmap::Bitmap( SalBitmap* pSalBitmap )
{
    mpImpBmp = new ImpBitmap();
    mpImpBmp->ImplSetSalBitmap( pSalBitmap );
    maPrefMapMode = MapMode( MAP_PIXEL );
    maPrefSize = mpImpBmp->ImplGetSize();
}

// ------------------------------------------------------------------

Bitmap::Bitmap( const Size& rSizePixel, sal_uInt16 nBitCount, const BitmapPalette* pPal )
{
	if( rSizePixel.Width() && rSizePixel.Height() )
	{
		BitmapPalette	aPal;
		BitmapPalette*	pRealPal = NULL;

		if( nBitCount <= 8 )
		{
			if( !pPal )
			{
				if( 1 == nBitCount )
				{
					aPal.SetEntryCount( 2 );
					aPal[ 0 ] = Color( COL_BLACK );
					aPal[ 1 ] = Color( COL_WHITE );
				}
				else if( ( 4 == nBitCount ) || ( 8 == nBitCount ) )
				{
					aPal.SetEntryCount( 1 << nBitCount );
					aPal[ 0 ] = Color( COL_BLACK );
					aPal[ 1 ] = Color( COL_BLUE );
					aPal[ 2 ] = Color( COL_GREEN );
					aPal[ 3 ] = Color( COL_CYAN );
					aPal[ 4 ] = Color( COL_RED );
					aPal[ 5 ] = Color( COL_MAGENTA );
					aPal[ 6 ] = Color( COL_BROWN );
					aPal[ 7 ] = Color( COL_GRAY );
					aPal[ 8 ] = Color( COL_LIGHTGRAY );
					aPal[ 9 ] = Color( COL_LIGHTBLUE );
					aPal[ 10 ] = Color( COL_LIGHTGREEN );
					aPal[ 11 ] = Color( COL_LIGHTCYAN );
					aPal[ 12 ] = Color( COL_LIGHTRED );
					aPal[ 13 ] = Color( COL_LIGHTMAGENTA );
					aPal[ 14 ] = Color( COL_YELLOW );
					aPal[ 15 ] = Color( COL_WHITE );

					// Dither-Palette erzeugen
					if( 8 == nBitCount )
					{
						sal_uInt16 nActCol = 16;

						for( sal_uInt16 nB = 0; nB < 256; nB += 51 )
							for( sal_uInt16 nG = 0; nG < 256; nG += 51 )
								for( sal_uInt16 nR = 0; nR < 256; nR += 51 )
									aPal[ nActCol++ ] = BitmapColor( (sal_uInt8) nR, (sal_uInt8) nG, (sal_uInt8) nB );

						// Standard-Office-Farbe setzen
						aPal[ nActCol++ ] = BitmapColor( 0, 184, 255 );
					}
				}
			}
			else
				pRealPal = (BitmapPalette*) pPal;
		}

		mpImpBmp = new ImpBitmap;
		mpImpBmp->ImplCreate( rSizePixel, nBitCount, pRealPal ? *pRealPal : aPal );
	}
	else
		mpImpBmp = NULL;
}

// ------------------------------------------------------------------

Bitmap::~Bitmap()
{
	ImplReleaseRef();
}

// ------------------------------------------------------------------

const BitmapPalette& Bitmap::GetGreyPalette( int nEntries )
{
	static BitmapPalette aGreyPalette2;
	static BitmapPalette aGreyPalette4;
	static BitmapPalette aGreyPalette16;
	static BitmapPalette aGreyPalette256;

	// create greyscale palette with 2, 4, 16 or 256 entries
	if( 2 == nEntries || 4 == nEntries || 16 == nEntries || 256 == nEntries )
	{
		if( 2 == nEntries )
		{
			if( !aGreyPalette2.GetEntryCount() )
			{
				aGreyPalette2.SetEntryCount( 2 );
				aGreyPalette2[ 0 ] = BitmapColor( 0, 0, 0 );
				aGreyPalette2[ 1 ] = BitmapColor( 255, 255, 255 );
			}

			return aGreyPalette2;
		}
		else if( 4 == nEntries )
		{
			if( !aGreyPalette4.GetEntryCount() )
			{
				aGreyPalette4.SetEntryCount( 4 );
				aGreyPalette4[ 0 ] = BitmapColor( 0, 0, 0 );
				aGreyPalette4[ 1 ] = BitmapColor( 85, 85, 85 );
				aGreyPalette4[ 2 ] = BitmapColor( 170, 170, 170 );
				aGreyPalette4[ 3 ] = BitmapColor( 255, 255, 255 );
			}

			return aGreyPalette4;
		}
		else if( 16 == nEntries )
		{
			if( !aGreyPalette16.GetEntryCount() )
			{
				sal_uInt8 cGrey = 0, cGreyInc = 17;

				aGreyPalette16.SetEntryCount( 16 );

				for( sal_uInt16 i = 0; i < 16; i++, cGrey = sal::static_int_cast<sal_uInt8>(cGrey + cGreyInc) )
					aGreyPalette16[ i ] = BitmapColor( cGrey, cGrey, cGrey );
			}

			return aGreyPalette16;
		}
		else
		{
			if( !aGreyPalette256.GetEntryCount() )
			{
				aGreyPalette256.SetEntryCount( 256 );

				for( sal_uInt16 i = 0; i < 256; i++ )
					aGreyPalette256[ i ] = BitmapColor( (sal_uInt8) i, (sal_uInt8) i, (sal_uInt8) i );
			}

			return aGreyPalette256;
		}
	}
	else
	{
		DBG_ERROR( "Bitmap::GetGreyPalette: invalid entry count (2/4/16/256 allowed)" );
		return aGreyPalette2;
	}
}

// ------------------------------------------------------------------

bool BitmapPalette::IsGreyPalette() const
{
	// TODO: add an IsGreyPalette flag to BitmapPalette
	// TODO: unless this causes problems binary compatibility
	const int nEntryCount = GetEntryCount();
	if( !nEntryCount ) // NOTE: an empty palette means 1:1 mapping
		return true;
	// see above: only certain entry values will result in a valid call to GetGreyPalette
	if( nEntryCount == 2 || nEntryCount == 4 || nEntryCount == 16 || nEntryCount == 256 )
	{
	    const BitmapPalette& rGreyPalette = Bitmap::GetGreyPalette( nEntryCount );
	    if( rGreyPalette == *this )
            return true;
    }
	// TODO: is it worth to compare the entries?
	return false;
}

// ------------------------------------------------------------------

Bitmap& Bitmap::operator=( const Bitmap& rBitmap )
{
	maPrefSize = rBitmap.maPrefSize;
	maPrefMapMode = rBitmap.maPrefMapMode;

	if ( rBitmap.mpImpBmp )
		rBitmap.mpImpBmp->ImplIncRefCount();

	ImplReleaseRef();
	mpImpBmp = rBitmap.mpImpBmp;

	return *this;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::IsEqual( const Bitmap& rBmp ) const
{
	return( IsSameInstance( rBmp ) ||
			( rBmp.GetSizePixel() == GetSizePixel() &&
			  rBmp.GetBitCount() == GetBitCount() &&
			  rBmp.GetChecksum() == GetChecksum() ) );
}

// ------------------------------------------------------------------

void Bitmap::SetEmpty()
{
	maPrefMapMode = MapMode();
	maPrefSize = Size();

	ImplReleaseRef();
	mpImpBmp = NULL;
}

// ------------------------------------------------------------------

Size Bitmap::GetSizePixel() const
{
	return( mpImpBmp ? mpImpBmp->ImplGetSize() : Size() );
}
// ------------------------------------------------------------------

void Bitmap::SetSizePixel( const Size& rNewSize )
{
	Scale( rNewSize );
}

// ------------------------------------------------------------------

Size Bitmap::GetSourceSizePixel() const
{
	return( mpImpBmp ? mpImpBmp->ImplGetSourceSize() : Size() );
}

// ------------------------------------------------------------------

void Bitmap::SetSourceSizePixel( const Size& rSize)
{
	if( mpImpBmp )
		mpImpBmp->ImplSetSourceSize( rSize);
}

// ------------------------------------------------------------------

sal_uInt16 Bitmap::GetBitCount() const
{
	return( mpImpBmp ? mpImpBmp->ImplGetBitCount() : 0 );
}

// ------------------------------------------------------------------

sal_Bool Bitmap::HasGreyPalette() const
{
	const sal_uInt16	nBitCount = GetBitCount();
	sal_Bool			bRet = sal_False;

	if( 1 == nBitCount )
	{
		BitmapReadAccess* pRAcc = ( (Bitmap*) this )->AcquireReadAccess();

		if( pRAcc )
		{
		    const BitmapColor& rCol0( pRAcc->GetPaletteColor( 0 ) );
		    const BitmapColor& rCol1( pRAcc->GetPaletteColor( 1 ) );
		    if( rCol0.GetRed() == rCol0.GetGreen() && rCol0.GetRed() == rCol0.GetBlue() &&
		        rCol1.GetRed() == rCol1.GetGreen() && rCol1.GetRed() == rCol1.GetBlue() )
		    {
		        bRet = sal_True;
		    }
			 ( (Bitmap*) this )->ReleaseAccess( pRAcc );
		}
		else
		    bRet = sal_True;
	}
	else if( 4 == nBitCount || 8 == nBitCount )
	{
		BitmapReadAccess* pRAcc = ( (Bitmap*) this )->AcquireReadAccess();

		if( pRAcc )
		{
			if( pRAcc->HasPalette() && ( (BitmapPalette&) pRAcc->GetPalette() == GetGreyPalette( 1 << nBitCount ) ) )
				bRet = sal_True;

			 ( (Bitmap*) this )->ReleaseAccess( pRAcc );
		}
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_uLong Bitmap::GetChecksum() const
{
	sal_uLong nRet = 0UL;

	if( mpImpBmp )
	{
		nRet = mpImpBmp->ImplGetChecksum();

		if( !nRet )
		{
			BitmapReadAccess* pRAcc = ( (Bitmap*) this )->AcquireReadAccess();

			if( pRAcc && pRAcc->Width() && pRAcc->Height() )
			{
				sal_uInt32	nCrc = 0;
				SVBT32		aBT32;

				pRAcc->ImplZeroInitUnusedBits();

				UInt32ToSVBT32( pRAcc->Width(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				UInt32ToSVBT32( pRAcc->Height(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				UInt32ToSVBT32( pRAcc->GetBitCount(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				UInt32ToSVBT32( pRAcc->GetColorMask().GetRedMask(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				UInt32ToSVBT32( pRAcc->GetColorMask().GetGreenMask(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				UInt32ToSVBT32( pRAcc->GetColorMask().GetBlueMask(), aBT32 );
				nCrc = rtl_crc32( nCrc, aBT32, 4 );

				if( pRAcc->HasPalette() )
				{
					nCrc = rtl_crc32( nCrc, pRAcc->GetPalette().ImplGetColorBuffer(),
									  pRAcc->GetPaletteEntryCount() * sizeof( BitmapColor ) );
				}

				nCrc = rtl_crc32( nCrc, pRAcc->GetBuffer(), pRAcc->GetScanlineSize() * pRAcc->Height() );

				mpImpBmp->ImplSetChecksum( nRet = nCrc );
			}

			if (pRAcc) ( (Bitmap*) this )->ReleaseAccess( pRAcc );
		}
	}

	return nRet;
}

// ------------------------------------------------------------------

void Bitmap::ImplReleaseRef()
{
	if( mpImpBmp )
	{
		if( mpImpBmp->ImplGetRefCount() > 1UL )
			mpImpBmp->ImplDecRefCount();
		else
		{
			delete mpImpBmp;
			mpImpBmp = NULL;
		}
	}
}

// ------------------------------------------------------------------

void Bitmap::ImplMakeUnique()
{
	if( mpImpBmp && mpImpBmp->ImplGetRefCount() > 1UL )
	{
		ImpBitmap* pOldImpBmp = mpImpBmp;

		pOldImpBmp->ImplDecRefCount();

		mpImpBmp = new ImpBitmap;
		mpImpBmp->ImplCreate( *pOldImpBmp );
	}
}

// ------------------------------------------------------------------

void Bitmap::ImplAssignWithSize( const Bitmap& rBitmap )
{
	const Size		aOldSizePix( GetSizePixel() );
	const Size		aNewSizePix( rBitmap.GetSizePixel() );
	const MapMode	aOldMapMode( maPrefMapMode );
	Size			aNewPrefSize;

	if( ( aOldSizePix != aNewSizePix ) && aOldSizePix.Width() && aOldSizePix.Height() )
	{
		aNewPrefSize.Width() = FRound( maPrefSize.Width() * aNewSizePix.Width() / aOldSizePix.Width() );
		aNewPrefSize.Height() = FRound( maPrefSize.Height() * aNewSizePix.Height() / aOldSizePix.Height() );
	}
	else
		aNewPrefSize = maPrefSize;

	*this = rBitmap;

	maPrefSize = aNewPrefSize;
	maPrefMapMode = aOldMapMode;
}

// ------------------------------------------------------------------

ImpBitmap* Bitmap::ImplGetImpBitmap() const
{
	return mpImpBmp;
}

// ------------------------------------------------------------------

void Bitmap::ImplSetImpBitmap( ImpBitmap* pImpBmp )
{
	if( pImpBmp != mpImpBmp )
	{
		ImplReleaseRef();
		mpImpBmp = pImpBmp;
	}
}

// ------------------------------------------------------------------

BitmapReadAccess* Bitmap::AcquireReadAccess()
{
	BitmapReadAccess* pReadAccess = new BitmapReadAccess( *this );

	if( !*pReadAccess )
	{
		delete pReadAccess;
		pReadAccess = NULL;
	}

	return pReadAccess;
}

// ------------------------------------------------------------------

BitmapWriteAccess* Bitmap::AcquireWriteAccess()
{
	BitmapWriteAccess* pWriteAccess = new BitmapWriteAccess( *this );

	if( !*pWriteAccess )
	{
		delete pWriteAccess;
		pWriteAccess = NULL;
	}

	return pWriteAccess;
}

// ------------------------------------------------------------------

void Bitmap::ReleaseAccess( BitmapReadAccess* pBitmapAccess )
{
	delete pBitmapAccess;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Erase( const Color& rFillColor )
{
	if( !(*this) )
		return sal_True;

	BitmapWriteAccess*	pWriteAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pWriteAcc )
	{
		const sal_uLong nFormat = pWriteAcc->GetScanlineFormat();
		sal_uInt8		cIndex = 0;
		sal_Bool		bFast = sal_False;

		switch( nFormat )
		{
			case( BMP_FORMAT_1BIT_MSB_PAL ):
			case( BMP_FORMAT_1BIT_LSB_PAL ):
			{
				cIndex = (sal_uInt8) pWriteAcc->GetBestPaletteIndex( rFillColor );
				cIndex = ( cIndex ? 255 : 0 );
				bFast = sal_True;
			}
			break;

			case( BMP_FORMAT_4BIT_MSN_PAL ):
			case( BMP_FORMAT_4BIT_LSN_PAL ):
			{
				cIndex = (sal_uInt8) pWriteAcc->GetBestPaletteIndex( rFillColor );
				cIndex = cIndex | ( cIndex << 4 );
				bFast = sal_True;
			}
			break;

			case( BMP_FORMAT_8BIT_PAL ):
			{
				cIndex = (sal_uInt8) pWriteAcc->GetBestPaletteIndex( rFillColor );
				bFast = sal_True;
			}
			break;

			case( BMP_FORMAT_24BIT_TC_BGR ):
			case( BMP_FORMAT_24BIT_TC_RGB ):
			{
				if( ( rFillColor.GetRed() == rFillColor.GetGreen() ) &&
					( rFillColor.GetRed() == rFillColor.GetBlue() ) )
				{
					cIndex = rFillColor.GetRed();
					bFast = sal_True;
				}
				else
					bFast = sal_False;
			}
			break;

			default:
				bFast = sal_False;
			break;
		}

		if( bFast )
		{
			const sal_uLong nBufSize = pWriteAcc->GetScanlineSize() * pWriteAcc->Height();
			memset( pWriteAcc->GetBuffer(), cIndex, nBufSize );
		}
		else
		{
			Point aTmpPoint;
			const Rectangle aRect( aTmpPoint, Size( pWriteAcc->Width(), pWriteAcc->Height() ) );
			pWriteAcc->SetFillColor( rFillColor );
			pWriteAcc->FillRect( aRect );
		}

		ReleaseAccess( pWriteAcc );
		bRet = sal_True;
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Invert()
{
	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pAcc )
	{
		if( pAcc->HasPalette() )
		{
			BitmapPalette	aBmpPal( pAcc->GetPalette() );
			const sal_uInt16	nCount = aBmpPal.GetEntryCount();

			for( sal_uInt16 i = 0; i < nCount; i++ )
				aBmpPal[ i ].Invert();

			pAcc->SetPalette( aBmpPal );
		}
		else
		{
			const long	nWidth = pAcc->Width();
			const long	nHeight = pAcc->Height();

			for( long nX = 0L; nX < nWidth; nX++ )
				for( long nY = 0L; nY < nHeight; nY++ )
					pAcc->SetPixel( nY, nX, pAcc->GetPixel( nY, nX ).Invert() );
		}

		ReleaseAccess( pAcc );
		bRet = sal_True;
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Mirror( sal_uLong nMirrorFlags )
{
	sal_Bool bHorz = ( ( nMirrorFlags & BMP_MIRROR_HORZ ) == BMP_MIRROR_HORZ );
	sal_Bool bVert = ( ( nMirrorFlags & BMP_MIRROR_VERT ) == BMP_MIRROR_VERT );
	sal_Bool bRet = sal_False;

	if( bHorz && !bVert )
	{
		BitmapWriteAccess*	pAcc = AcquireWriteAccess();

		if( pAcc )
		{
			const long	nWidth = pAcc->Width();
			const long	nHeight = pAcc->Height();
			const long	nWidth1 = nWidth - 1L;
			const long	nWidth_2 = nWidth >> 1L;

			for( long nY = 0L; nY < nHeight; nY++ )
			{
				for( long nX = 0L, nOther = nWidth1; nX < nWidth_2; nX++, nOther-- )
				{
					const BitmapColor aTemp( pAcc->GetPixel( nY, nX ) );

					pAcc->SetPixel( nY, nX, pAcc->GetPixel( nY, nOther ) );
					pAcc->SetPixel( nY, nOther, aTemp );
				}
			}

			ReleaseAccess( pAcc );
			bRet = sal_True;
		}
	}
	else if( bVert && !bHorz )
	{
		BitmapWriteAccess*	pAcc = AcquireWriteAccess();

		if( pAcc )
		{
			const long	nScanSize = pAcc->GetScanlineSize();
			sal_uInt8*		pBuffer = new sal_uInt8[ nScanSize ];
			const long	nHeight = pAcc->Height();
			const long	nHeight1 = nHeight - 1L;
			const long	nHeight_2 = nHeight >> 1L;

			for( long nY = 0L, nOther = nHeight1; nY < nHeight_2; nY++, nOther-- )
			{
				memcpy( pBuffer, pAcc->GetScanline( nY ), nScanSize );
				memcpy( pAcc->GetScanline( nY ), pAcc->GetScanline( nOther ), nScanSize );
				memcpy( pAcc->GetScanline( nOther ), pBuffer, nScanSize );
			}

			delete[] pBuffer;
			ReleaseAccess( pAcc );
			bRet = sal_True;
		}
	}
	else if( bHorz && bVert )
	{
		BitmapWriteAccess*	pAcc = AcquireWriteAccess();

		if( pAcc )
		{
			const long	nWidth = pAcc->Width();
			const long	nWidth1 = nWidth - 1L;
			const long	nHeight = pAcc->Height();
			long		nHeight_2 = nHeight >> 1;

			for( long nY = 0L, nOtherY = nHeight - 1L; nY < nHeight_2; nY++, nOtherY-- )
			{
				for( long nX = 0L, nOtherX = nWidth1; nX < nWidth; nX++, nOtherX-- )
				{
					const BitmapColor aTemp( pAcc->GetPixel( nY, nX ) );

					pAcc->SetPixel( nY, nX, pAcc->GetPixel( nOtherY, nOtherX ) );
					pAcc->SetPixel( nOtherY, nOtherX, aTemp );
				}
			}

			// ggf. noch mittlere Zeile horizontal spiegeln
			if( nHeight & 1 )
			{
				for( long nX = 0L, nOtherX = nWidth1, nWidth_2 = nWidth >> 1; nX < nWidth_2; nX++, nOtherX-- )
				{
					const BitmapColor aTemp( pAcc->GetPixel( nHeight_2, nX ) );
					pAcc->SetPixel( nHeight_2, nX, pAcc->GetPixel( nHeight_2, nOtherX ) );
					pAcc->SetPixel( nHeight_2, nOtherX, aTemp );
				}
			}

			ReleaseAccess( pAcc );
			bRet = sal_True;
		}
	}
	else
		bRet = sal_True;

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Rotate( long nAngle10, const Color& rFillColor )
{
	sal_Bool bRet = sal_False;

	nAngle10 %= 3600L;
	nAngle10 = ( nAngle10 < 0L ) ? ( 3599L + nAngle10 ) : nAngle10;

	if( !nAngle10	 )
		bRet = sal_True;
	else if( 1800L == nAngle10 )
		bRet = Mirror( BMP_MIRROR_HORZ | BMP_MIRROR_VERT );
	else
	{
		BitmapReadAccess*	pReadAcc = AcquireReadAccess();
		Bitmap				aRotatedBmp;

		if( pReadAcc )
		{
			const Size	aSizePix( GetSizePixel() );

			if( ( 900L == nAngle10 ) || ( 2700L == nAngle10 ) )
			{
				const Size			aNewSizePix( aSizePix.Height(), aSizePix.Width() );
				Bitmap				aNewBmp( aNewSizePix, GetBitCount(), &pReadAcc->GetPalette() );
				BitmapWriteAccess*	pWriteAcc = aNewBmp.AcquireWriteAccess();

				if( pWriteAcc )
				{
					const long	nWidth = aSizePix.Width();
					const long	nWidth1 = nWidth - 1L;
					const long	nHeight = aSizePix.Height();
					const long	nHeight1 = nHeight - 1L;
					const long	nNewWidth = aNewSizePix.Width();
					const long	nNewHeight = aNewSizePix.Height();

					if( 900L == nAngle10 )
					{
						for( long nY = 0L, nOtherX = nWidth1; nY < nNewHeight; nY++, nOtherX-- )
							for( long nX = 0L, nOtherY = 0L; nX < nNewWidth; nX++ )
								pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nOtherY++, nOtherX ) );
					}
					else if( 2700L == nAngle10 )
					{
						for( long nY = 0L, nOtherX = 0L; nY < nNewHeight; nY++, nOtherX++ )
							for( long nX = 0L, nOtherY = nHeight1; nX < nNewWidth; nX++ )
								pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nOtherY--, nOtherX ) );
					}

					aNewBmp.ReleaseAccess( pWriteAcc );
				}

				aRotatedBmp = aNewBmp;
			}
			else
			{
				Point		aTmpPoint;
				Rectangle	aTmpRectangle( aTmpPoint, aSizePix );
				Polygon 	aPoly( aTmpRectangle );
				aPoly.Rotate( aTmpPoint, (sal_uInt16) nAngle10 );

				Rectangle			aNewBound( aPoly.GetBoundRect() );
				const Size			aNewSizePix( aNewBound.GetSize() );
				Bitmap				aNewBmp( aNewSizePix, GetBitCount(), &pReadAcc->GetPalette() );
				BitmapWriteAccess*	pWriteAcc = aNewBmp.AcquireWriteAccess();

				if( pWriteAcc )
				{
					const BitmapColor	aFillColor( pWriteAcc->GetBestMatchingColor( rFillColor ) );
					const double		fCosAngle = cos( nAngle10 * F_PI1800 );
					const double		fSinAngle = sin( nAngle10 * F_PI1800 );
					const double		fXMin = aNewBound.Left();
					const double		fYMin = aNewBound.Top();
					const long			nWidth = aSizePix.Width();
					const long			nHeight = aSizePix.Height();
					const long			nNewWidth = aNewSizePix.Width();
					const long			nNewHeight = aNewSizePix.Height();
					long				nX;
					long				nY;
					long				nRotX;
					long				nRotY;
					long				nSinY;
					long				nCosY;
					long*				pCosX = new long[ nNewWidth ];
					long*				pSinX = new long[ nNewWidth ];
					long*				pCosY = new long[ nNewHeight ];
					long*				pSinY = new long[ nNewHeight ];

					for ( nX = 0; nX < nNewWidth; nX++ )
					{
						const double fTmp = ( fXMin + nX ) * 64.;

						pCosX[ nX ] = FRound( fCosAngle * fTmp );
						pSinX[ nX ] = FRound( fSinAngle * fTmp );
					}

					for ( nY = 0; nY < nNewHeight; nY++ )
					{
						const double fTmp = ( fYMin + nY ) * 64.;

						pCosY[ nY ] = FRound( fCosAngle * fTmp );
						pSinY[ nY ] = FRound( fSinAngle * fTmp );
					}

					for( nY = 0L; nY < nNewHeight; nY++ )
					{
						nSinY = pSinY[ nY ];
						nCosY = pCosY[ nY ];

						for( nX = 0L; nX < nNewWidth; nX++ )
						{
							nRotX = ( pCosX[ nX ] - nSinY ) >> 6;
							nRotY = ( pSinX[ nX ] + nCosY ) >> 6;

							if ( ( nRotX > -1L ) && ( nRotX < nWidth ) && ( nRotY > -1L ) && ( nRotY < nHeight ) )
								pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nRotY, nRotX ) );
							else
								pWriteAcc->SetPixel( nY, nX, aFillColor );
						}
					}

					delete[] pSinX;
					delete[] pCosX;
					delete[] pSinY;
					delete[] pCosY;

					aNewBmp.ReleaseAccess( pWriteAcc );
				}

				aRotatedBmp = aNewBmp;
			}

			ReleaseAccess( pReadAcc );
		}

		if( ( bRet = !!aRotatedBmp ) == sal_True )
			ImplAssignWithSize( aRotatedBmp );
	}

	return bRet;
};

// ------------------------------------------------------------------

sal_Bool Bitmap::Crop( const Rectangle& rRectPixel )
{
	const Size			aSizePix( GetSizePixel() );
	Rectangle			aRect( rRectPixel );
	sal_Bool				bRet = sal_False;

	aRect.Intersection( Rectangle( Point(), aSizePix ) );

	if( !aRect.IsEmpty() )
	{
		BitmapReadAccess* pReadAcc = AcquireReadAccess();

		if( pReadAcc )
		{
			Point				aTmpPoint;
			const Rectangle 	aNewRect( aTmpPoint, aRect.GetSize() );
			Bitmap				aNewBmp( aNewRect.GetSize(), GetBitCount(), &pReadAcc->GetPalette() );
			BitmapWriteAccess*	pWriteAcc = aNewBmp.AcquireWriteAccess();

			if( pWriteAcc )
			{
				const long nOldX = aRect.Left();
				const long nOldY = aRect.Top();
				const long nNewWidth = aNewRect.GetWidth();
				const long nNewHeight = aNewRect.GetHeight();

				for( long nY = 0, nY2 = nOldY; nY < nNewHeight; nY++, nY2++ )
					for( long nX = 0, nX2 = nOldX; nX < nNewWidth; nX++, nX2++ )
						pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nY2, nX2 ) );

				aNewBmp.ReleaseAccess( pWriteAcc );
				bRet = sal_True;
			}

			ReleaseAccess( pReadAcc );

			if( bRet )
				ImplAssignWithSize( aNewBmp );
		}
	}

	return bRet;
};

// ------------------------------------------------------------------

sal_Bool Bitmap::CopyPixel( const Rectangle& rRectDst,
						const Rectangle& rRectSrc, const Bitmap* pBmpSrc )
{
	const Size	aSizePix( GetSizePixel() );
	Rectangle	aRectDst( rRectDst );
	sal_Bool		bRet = sal_False;

	aRectDst.Intersection( Rectangle( Point(), aSizePix ) );

	if( !aRectDst.IsEmpty() )
	{
		if( pBmpSrc && ( *pBmpSrc != *this ) )
		{
			Bitmap* 		pSrc = (Bitmap*) pBmpSrc;
			const Size		aCopySizePix( pSrc->GetSizePixel() );
			Rectangle		aRectSrc( rRectSrc );
			const sal_uInt16	nSrcBitCount = pBmpSrc->GetBitCount();
			const sal_uInt16	nDstBitCount = GetBitCount();

			if( nSrcBitCount > nDstBitCount )
			{
				long nNextIndex = 0L;

				if( ( nSrcBitCount == 24 ) && ( nDstBitCount < 24 ) )
					Convert( BMP_CONVERSION_24BIT );
				else if( ( nSrcBitCount == 8 ) && ( nDstBitCount < 8 ) )
				{
					Convert( BMP_CONVERSION_8BIT_COLORS );
					nNextIndex = 16;
				}
				else if( ( nSrcBitCount == 4 ) && ( nDstBitCount < 4 ) )
				{
					Convert( BMP_CONVERSION_4BIT_COLORS );
					nNextIndex = 2;
				}

				if( nNextIndex )
				{
					BitmapReadAccess*	pSrcAcc = pSrc->AcquireReadAccess();
					BitmapWriteAccess*	pDstAcc = AcquireWriteAccess();

					if( pSrcAcc && pDstAcc )
					{
						const long		nSrcCount = pDstAcc->GetPaletteEntryCount();
						const long		nDstCount = 1 << nDstBitCount;
						sal_Bool			bFound;

						for( long i = 0L; ( i < nSrcCount ) && ( nNextIndex < nSrcCount ); i++ )
						{
							const BitmapColor& rSrcCol = pSrcAcc->GetPaletteColor( (sal_uInt16) i );

							bFound = sal_False;

							for( long j = 0L; j < nDstCount; j++ )
							{
								if( rSrcCol == pDstAcc->GetPaletteColor( (sal_uInt16) j ) )
								{
									bFound = sal_True;
									break;
								}
							}

							if( !bFound )
								pDstAcc->SetPaletteColor( (sal_uInt16) nNextIndex++, rSrcCol );
						}
					}

					if( pSrcAcc )
						pSrc->ReleaseAccess( pSrcAcc );

					if( pDstAcc )
						ReleaseAccess( pDstAcc );
				}
			}

			aRectSrc.Intersection( Rectangle( Point(), aCopySizePix ) );

			if( !aRectSrc.IsEmpty() )
			{
				BitmapReadAccess* pReadAcc = pSrc->AcquireReadAccess();

				if( pReadAcc )
				{
					BitmapWriteAccess* pWriteAcc = AcquireWriteAccess();

					if( pWriteAcc )
					{
						const long	nWidth = Min( aRectSrc.GetWidth(), aRectDst.GetWidth() );
						const long	nHeight = Min( aRectSrc.GetHeight(), aRectDst.GetHeight() );
						const long	nSrcEndX = aRectSrc.Left() + nWidth;
						const long	nSrcEndY = aRectSrc.Top() + nHeight;
						long		nDstY = aRectDst.Top();

						if( pReadAcc->HasPalette() && pWriteAcc->HasPalette() )
						{
							const sal_uInt16	nCount = pReadAcc->GetPaletteEntryCount();
							sal_uInt8*			pMap = new sal_uInt8[ nCount ];

							// Index-Map fuer Farbtabelle
							// aufbauen, da das Bild ja (relativ) farbgenau
							// kopiert werden soll
							for( sal_uInt16 i = 0; i < nCount; i++ )
								pMap[ i ] = (sal_uInt8) pWriteAcc->GetBestPaletteIndex( pReadAcc->GetPaletteColor( i ) );

							for( long nSrcY = aRectSrc.Top(); nSrcY < nSrcEndY; nSrcY++, nDstY++ )
								for( long nSrcX = aRectSrc.Left(), nDstX = aRectDst.Left(); nSrcX < nSrcEndX; nSrcX++, nDstX++ )
									pWriteAcc->SetPixelIndex( nDstY, nDstX, pMap[ pReadAcc->GetPixelIndex( nSrcY, nSrcX ) ] );

							delete[] pMap;
						}
						else if( pReadAcc->HasPalette() )
						{
							for( long nSrcY = aRectSrc.Top(); nSrcY < nSrcEndY; nSrcY++, nDstY++ )
								for( long nSrcX = aRectSrc.Left(), nDstX = aRectDst.Left(); nSrcX < nSrcEndX; nSrcX++, nDstX++ )
									pWriteAcc->SetPixel( nDstY, nDstX, pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nSrcY, nSrcX ) ) );
						}
						else
							for( long nSrcY = aRectSrc.Top(); nSrcY < nSrcEndY; nSrcY++, nDstY++ )
								for( long nSrcX = aRectSrc.Left(), nDstX = aRectDst.Left(); nSrcX < nSrcEndX; nSrcX++, nDstX++ )
									pWriteAcc->SetPixel( nDstY, nDstX, pReadAcc->GetPixel( nSrcY, nSrcX ) );

						ReleaseAccess( pWriteAcc );
						bRet = ( nWidth > 0L ) && ( nHeight > 0L );
					}

					pSrc->ReleaseAccess( pReadAcc );
				}
			}
		}
		else
		{
			Rectangle aRectSrc( rRectSrc );

			aRectSrc.Intersection( Rectangle( Point(), aSizePix ) );

			if( !aRectSrc.IsEmpty() && ( aRectSrc != aRectDst ) )
			{
				BitmapWriteAccess*	pWriteAcc = AcquireWriteAccess();

				if( pWriteAcc )
				{
					const long	nWidth = Min( aRectSrc.GetWidth(), aRectDst.GetWidth() );
					const long	nHeight = Min( aRectSrc.GetHeight(), aRectDst.GetHeight() );
					const long	nSrcX = aRectSrc.Left();
					const long	nSrcY = aRectSrc.Top();
					const long	nSrcEndX1 = nSrcX + nWidth - 1L;
					const long	nSrcEndY1 = nSrcY + nHeight - 1L;
					const long	nDstX = aRectDst.Left();
					const long	nDstY = aRectDst.Top();
					const long	nDstEndX1 = nDstX + nWidth - 1L;
					const long	nDstEndY1 = nDstY + nHeight - 1L;

					if( ( nDstX <= nSrcX ) && ( nDstY <= nSrcY ) )
					{
						for( long nY = nSrcY, nYN = nDstY; nY <= nSrcEndY1; nY++, nYN++ )
							for( long nX = nSrcX, nXN = nDstX; nX <= nSrcEndX1; nX++, nXN++ )
								pWriteAcc->SetPixel( nYN, nXN, pWriteAcc->GetPixel( nY, nX ) );
					}
					else if( ( nDstX <= nSrcX ) && ( nDstY >= nSrcY ) )
					{
						for( long nY = nSrcEndY1, nYN = nDstEndY1; nY >= nSrcY; nY--, nYN-- )
							for( long nX = nSrcX, nXN = nDstX; nX <= nSrcEndX1; nX++, nXN++ )
								pWriteAcc->SetPixel( nYN, nXN, pWriteAcc->GetPixel( nY, nX ) );
					}
					else if( ( nDstX >= nSrcX ) && ( nDstY <= nSrcY ) )
					{
						for( long nY = nSrcY, nYN = nDstY; nY <= nSrcEndY1; nY++, nYN++ )
							for( long nX = nSrcEndX1, nXN = nDstEndX1; nX >= nSrcX; nX--, nXN-- )
								pWriteAcc->SetPixel( nYN, nXN, pWriteAcc->GetPixel( nY, nX ) );
					}
					else
					{
						for( long nY = nSrcEndY1, nYN = nDstEndY1; nY >= nSrcY; nY--, nYN-- )
							for( long nX = nSrcEndX1, nXN = nDstEndX1; nX >= nSrcX; nX--, nXN-- )
								pWriteAcc->SetPixel( nYN, nXN, pWriteAcc->GetPixel( nY, nX ) );
					}

					ReleaseAccess( pWriteAcc );
					bRet = sal_True;
				}
			}
		}
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Expand( sal_uLong nDX, sal_uLong nDY, const Color* pInitColor )
{
	sal_Bool bRet = sal_False;

	if( nDX || nDY )
	{
		const Size			aSizePixel( GetSizePixel() );
		const long			nWidth = aSizePixel.Width();
		const long			nHeight = aSizePixel.Height();
		const Size			aNewSize( nWidth + nDX, nHeight + nDY );
		BitmapReadAccess*	pReadAcc = AcquireReadAccess();

		if( pReadAcc )
		{
			BitmapPalette		aBmpPal( pReadAcc->GetPalette() );
			Bitmap				aNewBmp( aNewSize, GetBitCount(), &aBmpPal );
			BitmapWriteAccess*	pWriteAcc = aNewBmp.AcquireWriteAccess();

			if( pWriteAcc )
			{
				BitmapColor aColor;
				const long	nNewX = nWidth;
				const long	nNewY = nHeight;
				const long	nNewWidth = pWriteAcc->Width();
				const long	nNewHeight = pWriteAcc->Height();
				long		nX;
				long		nY;

				if( pInitColor )
					aColor = pWriteAcc->GetBestMatchingColor( *pInitColor );

				for( nY = 0L; nY < nHeight; nY++ )
				{
					pWriteAcc->CopyScanline( nY, *pReadAcc );

					if( pInitColor && nDX )
						for( nX = nNewX; nX < nNewWidth; nX++ )
							pWriteAcc->SetPixel( nY, nX, aColor );
				}

				if( pInitColor && nDY )
					for( nY = nNewY; nY < nNewHeight; nY++ )
						for( nX = 0; nX < nNewWidth; nX++ )
							pWriteAcc->SetPixel( nY, nX, aColor );

				aNewBmp.ReleaseAccess( pWriteAcc );
				bRet = sal_True;
			}

			ReleaseAccess( pReadAcc );

			if( bRet )
				ImplAssignWithSize( aNewBmp );
		}
	}

	return bRet;
}

// ------------------------------------------------------------------

Bitmap Bitmap::CreateMask( const Color& rTransColor, sal_uLong nTol ) const
{
	Bitmap				aNewBmp( GetSizePixel(), 1 );
	BitmapWriteAccess*	pWriteAcc = aNewBmp.AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pWriteAcc )
	{
		BitmapReadAccess* pReadAcc = ( (Bitmap*) this )->AcquireReadAccess();

		if( pReadAcc )
		{
			const long			nWidth = pReadAcc->Width();
			const long			nHeight = pReadAcc->Height();
			const BitmapColor	aBlack( pWriteAcc->GetBestMatchingColor( Color( COL_BLACK ) ) );
			const BitmapColor	aWhite( pWriteAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );

			if( !nTol )
			{
				const BitmapColor	aTest( pReadAcc->GetBestMatchingColor( rTransColor ) );
				long				nX, nY, nShift;

				if( pReadAcc->GetScanlineFormat() == BMP_FORMAT_4BIT_MSN_PAL ||
					pReadAcc->GetScanlineFormat() == BMP_FORMAT_4BIT_LSN_PAL )
				{
					// optimized for 4Bit-MSN/LSN source palette
					const sal_uInt8 cTest = aTest.GetIndex();
					const long nShiftInit = ( ( pReadAcc->GetScanlineFormat() == BMP_FORMAT_4BIT_MSN_PAL ) ? 4 : 0 );

					if(	pWriteAcc->GetScanlineFormat() == BMP_FORMAT_1BIT_MSB_PAL &&
						aWhite.GetIndex() == 1 )
					{
						// optimized for 1Bit-MSB destination palette
						for( nY = 0L; nY < nHeight; nY++ )
						{
							Scanline pSrc = pReadAcc->GetScanline( nY );
							Scanline pDst = pWriteAcc->GetScanline( nY );
							for( nX = 0L, nShift = nShiftInit; nX < nWidth; nX++, nShift ^= 4 )
							{
								if( cTest == ( ( pSrc[ nX >> 1 ] >> nShift ) & 0x0f ) )
									pDst[ nX >> 3 ] |= 1 << ( 7 - ( nX & 7 ) );
								else
									pDst[ nX >> 3 ] &= ~( 1 << ( 7 - ( nX & 7 ) ) );
							}
						}
					}
					else
					{
						for( nY = 0L; nY < nHeight; nY++ )
						{
							Scanline pSrc = pReadAcc->GetScanline( nY );
							for( nX = 0L, nShift = nShiftInit; nX < nWidth; nX++, nShift ^= 4 )
							{
								if( cTest == ( ( pSrc[ nX >> 1 ] >> nShift ) & 0x0f ) )
									pWriteAcc->SetPixel( nY, nX, aWhite );
								else
									pWriteAcc->SetPixel( nY, nX, aBlack );
							}
						}
					}
				}
				else if( pReadAcc->GetScanlineFormat() == BMP_FORMAT_8BIT_PAL )
				{
					// optimized for 8Bit source palette
					const sal_uInt8 cTest = aTest.GetIndex();

					if(	pWriteAcc->GetScanlineFormat() == BMP_FORMAT_1BIT_MSB_PAL &&
						aWhite.GetIndex() == 1 )
					{
						// optimized for 1Bit-MSB destination palette
						for( nY = 0L; nY < nHeight; nY++ )
						{
							Scanline pSrc = pReadAcc->GetScanline( nY );
							Scanline pDst = pWriteAcc->GetScanline( nY );
							for( nX = 0L; nX < nWidth; nX++ )
							{
								if( cTest == pSrc[ nX ] )
									pDst[ nX >> 3 ] |= 1 << ( 7 - ( nX & 7 ) );
								else
									pDst[ nX >> 3 ] &= ~( 1 << ( 7 - ( nX & 7 ) ) );
							}
						}
					}
					else
					{
						for( nY = 0L; nY < nHeight; nY++ )
						{
							Scanline pSrc = pReadAcc->GetScanline( nY );
							for( nX = 0L; nX < nWidth; nX++ )
							{
								if( cTest == pSrc[ nX ] )
									pWriteAcc->SetPixel( nY, nX, aWhite );
								else
									pWriteAcc->SetPixel( nY, nX, aBlack );
							}
						}
					}
				}
				else
				{
					// not optimized
					for( nY = 0L; nY < nHeight; nY++ )
					{
						for( nX = 0L; nX < nWidth; nX++ )
						{
							if( aTest == pReadAcc->GetPixel( nY, nX ) )
								pWriteAcc->SetPixel( nY, nX, aWhite );
							else
								pWriteAcc->SetPixel( nY, nX, aBlack );
						}
					}
				}
			}
			else
			{
				BitmapColor aCol;
				long		nR, nG, nB;
				const long	nMinR = MinMax( (long) rTransColor.GetRed() - nTol, 0, 255 );
				const long	nMaxR = MinMax( (long) rTransColor.GetRed() + nTol, 0, 255 );
				const long	nMinG = MinMax( (long) rTransColor.GetGreen() - nTol, 0, 255 );
				const long	nMaxG = MinMax( (long) rTransColor.GetGreen() + nTol, 0, 255 );
				const long	nMinB = MinMax( (long) rTransColor.GetBlue() - nTol, 0, 255 );
				const long	nMaxB = MinMax( (long) rTransColor.GetBlue() + nTol, 0, 255 );

				if( pReadAcc->HasPalette() )
				{
					for( long nY = 0L; nY < nHeight; nY++ )
					{
						for( long nX = 0L; nX < nWidth; nX++ )
						{
							aCol = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nX ) );
							nR = aCol.GetRed();
							nG = aCol.GetGreen();
							nB = aCol.GetBlue();

							if( nMinR <= nR && nMaxR >= nR &&
								nMinG <= nG && nMaxG >= nG &&
								nMinB <= nB && nMaxB >= nB )
							{
								pWriteAcc->SetPixel( nY, nX, aWhite );
							}
							else
								pWriteAcc->SetPixel( nY, nX, aBlack );
						}
					}
				}
				else
				{
					for( long nY = 0L; nY < nHeight; nY++ )
					{
						for( long nX = 0L; nX < nWidth; nX++ )
						{
							aCol = pReadAcc->GetPixel( nY, nX );
							nR = aCol.GetRed();
							nG = aCol.GetGreen();
							nB = aCol.GetBlue();

							if( nMinR <= nR && nMaxR >= nR &&
								nMinG <= nG && nMaxG >= nG &&
								nMinB <= nB && nMaxB >= nB )
							{
								pWriteAcc->SetPixel( nY, nX, aWhite );
							}
							else
								pWriteAcc->SetPixel( nY, nX, aBlack );
						}
					}
				}
			}

			( (Bitmap*) this )->ReleaseAccess( pReadAcc );
			bRet = sal_True;
		}

		aNewBmp.ReleaseAccess( pWriteAcc );
	}

	if( bRet )
	{
		aNewBmp.maPrefSize = maPrefSize;
		aNewBmp.maPrefMapMode = maPrefMapMode;
	}
	else
		aNewBmp = Bitmap();

	return aNewBmp;
}

// ------------------------------------------------------------------

Region Bitmap::CreateRegion( const Color& rColor, const Rectangle& rRect ) const
{
	Region				aRegion;
	Rectangle			aRect( rRect );
	BitmapReadAccess*	pReadAcc = ( (Bitmap*) this )->AcquireReadAccess();

	aRect.Intersection( Rectangle( Point(), GetSizePixel() ) );
	aRect.Justify();

	if( pReadAcc )
	{
		Rectangle			aSubRect;
		const long			nLeft = aRect.Left();
		const long			nTop = aRect.Top();
		const long			nRight = aRect.Right();
		const long			nBottom = aRect.Bottom();
		const BitmapColor	aMatch( pReadAcc->GetBestMatchingColor( rColor ) );

		aRegion.ImplBeginAddRect();

		for( long nY = nTop; nY <= nBottom; nY++ )
		{
			aSubRect.Top() = aSubRect.Bottom() = nY;

			for( long nX = nLeft; nX <= nRight; )
			{
				while( ( nX <= nRight ) && ( aMatch != pReadAcc->GetPixel( nY, nX ) ) )
					nX++;

				if( nX <= nRight )
				{
					aSubRect.Left() = nX;

					while( ( nX <= nRight ) && ( aMatch == pReadAcc->GetPixel( nY, nX ) ) )
						nX++;

					aSubRect.Right() = nX - 1L;
					aRegion.ImplAddRect( aSubRect );
				}
			}
		}

		aRegion.ImplEndAddRect();
		( (Bitmap*) this )->ReleaseAccess( pReadAcc );
	}
	else
		aRegion = aRect;

	return aRegion;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Replace( const Bitmap& rMask, const Color& rReplaceColor )
{
	BitmapReadAccess*	pMaskAcc = ( (Bitmap&) rMask ).AcquireReadAccess();
	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pMaskAcc && pAcc )
	{
		const long			nWidth = Min( pMaskAcc->Width(), pAcc->Width() );
		const long			nHeight = Min( pMaskAcc->Height(), pAcc->Height() );
		const BitmapColor	aMaskWhite( pMaskAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );
		BitmapColor 		aReplace;

		if( pAcc->HasPalette() )
		{
			const sal_uInt16 nActColors = pAcc->GetPaletteEntryCount();
			const sal_uInt16 nMaxColors = 1 << pAcc->GetBitCount();

			// default to the nearest color
			aReplace = pAcc->GetBestMatchingColor( rReplaceColor );

			// for paletted images without a matching palette entry
			// look for an unused palette entry (NOTE: expensive!)
			if( pAcc->GetPaletteColor( aReplace.GetIndex() ) != BitmapColor( rReplaceColor ) )
			{
				// if the palette has empty entries use the last one
				if( nActColors < nMaxColors )
				{
					pAcc->SetPaletteEntryCount( nActColors + 1 );
					pAcc->SetPaletteColor( nActColors, rReplaceColor );
					aReplace = BitmapColor( (sal_uInt8) nActColors );
				}
				else
				{
					sal_Bool* pFlags = new sal_Bool[ nMaxColors ];

					// alle Eintraege auf 0 setzen
					memset( pFlags, 0, nMaxColors );

					for( long nY = 0L; nY < nHeight; nY++ )
						for( long nX = 0L; nX < nWidth; nX++ )
							pFlags[ pAcc->GetPixelIndex( nY, nX ) ] = sal_True;

					for( sal_uInt16 i = 0UL; i < nMaxColors; i++ )
					{
						// Hurra, wir haben einen unbenutzten Eintrag
						if( !pFlags[ i ] )
						{
							pAcc->SetPaletteColor( (sal_uInt16) i, rReplaceColor );
							aReplace = BitmapColor( (sal_uInt8) i );
						}
					}

					delete[] pFlags;
				}
			}
		}
		else
			aReplace = rReplaceColor;

		for( long nY = 0L; nY < nHeight; nY++ )
			for( long nX = 0L; nX < nWidth; nX++ )
				if( pMaskAcc->GetPixel( nY, nX ) == aMaskWhite )
					pAcc->SetPixel( nY, nX, aReplace );

        bRet = sal_True;
	}

	( (Bitmap&) rMask ).ReleaseAccess( pMaskAcc );
	ReleaseAccess( pAcc );

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Replace( const AlphaMask& rAlpha, const Color& rMergeColor )
{
	Bitmap				aNewBmp( GetSizePixel(), 24 );
	BitmapReadAccess*	pAcc = AcquireReadAccess();
	BitmapReadAccess*	pAlphaAcc = ( (AlphaMask&) rAlpha ).AcquireReadAccess();
	BitmapWriteAccess*	pNewAcc = aNewBmp.AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pAcc && pAlphaAcc && pNewAcc )
	{
		BitmapColor	aCol;
		const long	nWidth = Min( pAlphaAcc->Width(), pAcc->Width() );
		const long	nHeight = Min( pAlphaAcc->Height(), pAcc->Height() );

		for( long nY = 0L; nY < nHeight; nY++ )
		{
			for( long nX = 0L; nX < nWidth; nX++ )
			{
				aCol = pAcc->GetColor( nY, nX );
				pNewAcc->SetPixel( nY, nX, aCol.Merge( rMergeColor, 255 - pAlphaAcc->GetPixelIndex( nY, nX ) ) );
			}
		}

		bRet = sal_True;
	}

	ReleaseAccess( pAcc );
	( (AlphaMask&) rAlpha ).ReleaseAccess( pAlphaAcc );
	aNewBmp.ReleaseAccess( pNewAcc );

	if( bRet )
	{
		const MapMode	aMap( maPrefMapMode );
		const Size		aSize( maPrefSize );

		*this = aNewBmp;

		maPrefMapMode = aMap;
		maPrefSize = aSize;
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uLong nTol )
{
	// Bitmaps with 1 bit color depth can cause problems
	// if they have other entries than black/white in their palette
	if( 1 == GetBitCount() )
		Convert( BMP_CONVERSION_4BIT_COLORS );

	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pAcc )
	{
		const long	nMinR = MinMax( (long) rSearchColor.GetRed() - nTol, 0, 255 );
		const long	nMaxR = MinMax( (long) rSearchColor.GetRed() + nTol, 0, 255 );
		const long	nMinG = MinMax( (long) rSearchColor.GetGreen() - nTol, 0, 255 );
		const long	nMaxG = MinMax( (long) rSearchColor.GetGreen() + nTol, 0, 255 );
		const long	nMinB = MinMax( (long) rSearchColor.GetBlue() - nTol, 0, 255 );
		const long	nMaxB = MinMax( (long) rSearchColor.GetBlue() + nTol, 0, 255 );

		if( pAcc->HasPalette() )
		{
			for( sal_uInt16 i = 0, nPalCount = pAcc->GetPaletteEntryCount(); i < nPalCount; i++ )
			{
				const BitmapColor& rCol = pAcc->GetPaletteColor( i );

				if( nMinR <= rCol.GetRed() && nMaxR >= rCol.GetRed() &&
					nMinG <= rCol.GetGreen() && nMaxG >= rCol.GetGreen() &&
					nMinB <= rCol.GetBlue() && nMaxB >= rCol.GetBlue() )
				{
					pAcc->SetPaletteColor( i, rReplaceColor );
				}
			}
		}
		else
		{
			BitmapColor 		aCol;
			const BitmapColor	aReplace( pAcc->GetBestMatchingColor( rReplaceColor ) );

			for( long nY = 0L, nHeight = pAcc->Height(); nY < nHeight; nY++ )
			{
				for( long nX = 0L, nWidth = pAcc->Width(); nX < nWidth; nX++ )
				{
					aCol = pAcc->GetPixel( nY, nX );

					if( nMinR <= aCol.GetRed() && nMaxR >= aCol.GetRed() &&
						nMinG <= aCol.GetGreen() && nMaxG >= aCol.GetGreen() &&
						nMinB <= aCol.GetBlue() && nMaxB >= aCol.GetBlue() )
					{
						pAcc->SetPixel( nY, nX, aReplace );
					}
				}
			}
		}

		ReleaseAccess( pAcc );
		bRet = sal_True;
	}

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Replace( const Color* pSearchColors, const Color* pReplaceColors,
					  sal_uLong nColorCount, sal_uLong* _pTols )
{
	// Bitmaps with 1 bit color depth can cause problems
	// if they have other entries than black/white in their palette
	if( 1 == GetBitCount() )
		Convert( BMP_CONVERSION_4BIT_COLORS );

	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pAcc )
	{
		long*	pMinR = new long[ nColorCount ];
		long*	pMaxR = new long[ nColorCount ];
		long*	pMinG = new long[ nColorCount ];
		long*	pMaxG = new long[ nColorCount ];
		long*	pMinB = new long[ nColorCount ];
		long*	pMaxB = new long[ nColorCount ];
		long*	pTols;
		sal_uLong	i;

		if( !_pTols )
		{
			pTols = new long[ nColorCount ];
			memset( pTols, 0, nColorCount * sizeof( long ) );
		}
		else
			pTols = (long*) _pTols;

		for( i = 0UL; i < nColorCount; i++ )
		{
			const Color&	rCol = pSearchColors[ i ];
			const long		nTol = pTols[ i ];

			pMinR[ i ] = MinMax( (long) rCol.GetRed() - nTol, 0, 255 );
			pMaxR[ i ] = MinMax( (long) rCol.GetRed() + nTol, 0, 255 );
			pMinG[ i ] = MinMax( (long) rCol.GetGreen() - nTol, 0, 255 );
			pMaxG[ i ] = MinMax( (long) rCol.GetGreen() + nTol, 0, 255 );
			pMinB[ i ] = MinMax( (long) rCol.GetBlue() - nTol, 0, 255 );
			pMaxB[ i ] = MinMax( (long) rCol.GetBlue() + nTol, 0, 255 );
		}

		if( pAcc->HasPalette() )
		{
			for( sal_uInt16 nEntry = 0, nPalCount = pAcc->GetPaletteEntryCount(); nEntry < nPalCount; nEntry++ )
			{
				const BitmapColor& rCol = pAcc->GetPaletteColor( nEntry );

				for( i = 0UL; i < nColorCount; i++ )
				{
					if( pMinR[ i ] <= rCol.GetRed() && pMaxR[ i ] >= rCol.GetRed() &&
						pMinG[ i ] <= rCol.GetGreen() && pMaxG[ i ] >= rCol.GetGreen() &&
						pMinB[ i ] <= rCol.GetBlue() && pMaxB[ i ] >= rCol.GetBlue() )
					{
						pAcc->SetPaletteColor( (sal_uInt16)nEntry, pReplaceColors[ i ] );
						break;
					}
				}
			}
		}
		else
		{
			BitmapColor 	aCol;
			BitmapColor*	pReplaces = new BitmapColor[ nColorCount ];

			for( i = 0UL; i < nColorCount; i++ )
				pReplaces[ i ] = pAcc->GetBestMatchingColor( pReplaceColors[ i ] );

			for( long nY = 0L, nHeight = pAcc->Height(); nY < nHeight; nY++ )
			{
				for( long nX = 0L, nWidth = pAcc->Width(); nX < nWidth; nX++ )
				{
					aCol = pAcc->GetPixel( nY, nX );

					for( i = 0UL; i < nColorCount; i++ )
					{
						if( pMinR[ i ] <= aCol.GetRed() && pMaxR[ i ] >= aCol.GetRed() &&
							pMinG[ i ] <= aCol.GetGreen() && pMaxG[ i ] >= aCol.GetGreen() &&
							pMinB[ i ] <= aCol.GetBlue() && pMaxB[ i ] >= aCol.GetBlue() )
						{
							pAcc->SetPixel( nY, nX, pReplaces[ i ] );
							break;
						}
					}
				}
			}

			delete[] pReplaces;
		}

		if( !_pTols )
			delete[] pTols;

		delete[] pMinR;
		delete[] pMaxR;
		delete[] pMinG;
		delete[] pMaxG;
		delete[] pMinB;
		delete[] pMaxB;
		ReleaseAccess( pAcc );
		bRet = sal_True;
	}

	return bRet;
}

// ------------------------------------------------------------------

Bitmap Bitmap::CreateDisplayBitmap( OutputDevice* pDisplay )
{
	Bitmap aDispBmp( *this );

	if( mpImpBmp && ( pDisplay->mpGraphics || pDisplay->ImplGetGraphics() ) )
	{
		ImpBitmap* pImpDispBmp = new ImpBitmap;

		if( pImpDispBmp->ImplCreate( *mpImpBmp, pDisplay->mpGraphics ) )
			aDispBmp.ImplSetImpBitmap( pImpDispBmp );
		else
			delete pImpDispBmp;
	}

	return aDispBmp;
}

// ------------------------------------------------------------------

Bitmap Bitmap::GetColorTransformedBitmap( BmpColorMode eColorMode ) const
{
    Bitmap  aRet;

	if( BMP_COLOR_HIGHCONTRAST == eColorMode )
	{
	    Color*  pSrcColors = NULL;
    	Color*  pDstColors = NULL;
    	sal_uLong   nColorCount = 0;

		aRet = *this;

    	Image::GetColorTransformArrays( (ImageColorTransform) eColorMode, pSrcColors, pDstColors, nColorCount );

    	if( nColorCount && pSrcColors && pDstColors )
       		aRet.Replace( pSrcColors, pDstColors, nColorCount );

    	delete[] pSrcColors;
    	delete[] pDstColors;
	}
	else if( BMP_COLOR_MONOCHROME_BLACK == eColorMode ||
			 BMP_COLOR_MONOCHROME_WHITE == eColorMode )
	{
		aRet = *this;
		aRet.MakeMono( BMP_COLOR_MONOCHROME_THRESHOLD );
	}

    return aRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::CombineSimple( const Bitmap& rMask, BmpCombine eCombine )
{
	BitmapReadAccess*	pMaskAcc = ( (Bitmap&) rMask ).AcquireReadAccess();
	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pMaskAcc && pAcc )
	{
		const long			nWidth = Min( pMaskAcc->Width(), pAcc->Width() );
		const long			nHeight = Min( pMaskAcc->Height(), pAcc->Height() );
		const Color 		aColBlack( COL_BLACK );
		BitmapColor 		aPixel;
		BitmapColor 		aMaskPixel;
		const BitmapColor	aWhite( pAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );
		const BitmapColor	aBlack( pAcc->GetBestMatchingColor( aColBlack ) );
		const BitmapColor	aMaskBlack( pMaskAcc->GetBestMatchingColor( aColBlack ) );

		switch( eCombine )
		{
			case( BMP_COMBINE_COPY ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pMaskAcc->GetPixel( nY, nX ) == aMaskBlack )
						pAcc->SetPixel( nY, nX, aBlack );
					else
						pAcc->SetPixel( nY, nX, aWhite );
				}
			}
			break;

			case( BMP_COMBINE_INVERT ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pAcc->GetPixel( nY, nX ) == aBlack )
						pAcc->SetPixel( nY, nX, aWhite );
					else
						pAcc->SetPixel( nY, nX, aBlack );
				}
			}
			break;

			case( BMP_COMBINE_AND ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pMaskAcc->GetPixel( nY, nX ) != aMaskBlack && pAcc->GetPixel( nY, nX ) != aBlack )
						pAcc->SetPixel( nY, nX, aWhite );
					else
						pAcc->SetPixel( nY, nX, aBlack );
				}
			}
			break;

			case( BMP_COMBINE_NAND ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pMaskAcc->GetPixel( nY, nX ) != aMaskBlack && pAcc->GetPixel( nY, nX ) != aBlack )
						pAcc->SetPixel( nY, nX, aBlack );
					else
						pAcc->SetPixel( nY, nX, aWhite );
				}
			}
			break;

			case( BMP_COMBINE_OR ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pMaskAcc->GetPixel( nY, nX ) != aMaskBlack || pAcc->GetPixel( nY, nX ) != aBlack )
						pAcc->SetPixel( nY, nX, aWhite );
					else
						pAcc->SetPixel( nY, nX, aBlack );
				}
			}
			break;

			case( BMP_COMBINE_NOR ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					if( pMaskAcc->GetPixel( nY, nX ) != aMaskBlack || pAcc->GetPixel( nY, nX ) != aBlack )
						pAcc->SetPixel( nY, nX, aBlack );
					else
						pAcc->SetPixel( nY, nX, aWhite );
				}
			}
			break;

			case( BMP_COMBINE_XOR ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					aPixel = pAcc->GetPixel( nY, nX );
					aMaskPixel = pMaskAcc->GetPixel( nY, nX );

					if( ( aMaskPixel != aMaskBlack && aPixel == aBlack ) ||
						( aMaskPixel == aMaskBlack && aPixel != aBlack ) )
					{
						pAcc->SetPixel( nY, nX, aWhite );
					}
					else
						pAcc->SetPixel( nY, nX, aBlack );
				}
			}
			break;

			case( BMP_COMBINE_NXOR ):
			{
				for( long nY = 0L; nY < nHeight; nY++ ) for( long nX = 0L; nX < nWidth; nX++ )
				{
					aPixel = pAcc->GetPixel( nY, nX );
					aMaskPixel = pMaskAcc->GetPixel( nY, nX );

					if( ( aMaskPixel != aMaskBlack && aPixel == aBlack ) ||
						( aMaskPixel == aMaskBlack && aPixel != aBlack ) )
					{
						pAcc->SetPixel( nY, nX, aBlack );
					}
					else
						pAcc->SetPixel( nY, nX, aWhite );
				}
			}
			break;
		}

        bRet = sal_True;
	}

	( (Bitmap&) rMask ).ReleaseAccess( pMaskAcc );
	ReleaseAccess( pAcc );

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::Blend( const AlphaMask& rAlpha, const Color& rBackgroundColor )
{
    // TODO: Have a look at OutputDevice::ImplDrawAlpha() for some
    // optimizations. Might even consolidate the code here and there.

    // convert to a truecolor bitmap, if we're a paletted one. There's
    // room for tradeoff decision here, maybe later for an overload (or a flag)
    if( GetBitCount() <= 8 )
        Convert( BMP_CONVERSION_24BIT );

	BitmapReadAccess*	pAlphaAcc = const_cast<AlphaMask&>(rAlpha).AcquireReadAccess();
	BitmapWriteAccess*	pAcc = AcquireWriteAccess();
	sal_Bool				bRet = sal_False;

	if( pAlphaAcc && pAcc )
	{
		const long			nWidth = Min( pAlphaAcc->Width(), pAcc->Width() );
		const long			nHeight = Min( pAlphaAcc->Height(), pAcc->Height() );

		for( long nY = 0L; nY < nHeight; ++nY )
			for( long nX = 0L; nX < nWidth; ++nX )
                pAcc->SetPixel( nY, nX,
                                pAcc->GetPixel( nY, nX ).Merge( rBackgroundColor,
                                                                255 - pAlphaAcc->GetPixelIndex( nY, nX ) ) );

        bRet = sal_True;
	}

	const_cast<AlphaMask&>(rAlpha).ReleaseAccess( pAlphaAcc );
	ReleaseAccess( pAcc );

	return bRet;
}

// ------------------------------------------------------------------

sal_Bool Bitmap::MakeMono( sal_uInt8 cThreshold )
{
	return ImplMakeMono( cThreshold );
}

// ------------------------------------------------------------------

bool Bitmap::GetSystemData( BitmapSystemData& rData ) const
{
    bool bRet = false;
    if( mpImpBmp )
    {
        SalBitmap* pSalBitmap = mpImpBmp->ImplGetSalBitmap();
        if( pSalBitmap )
            bRet = pSalBitmap->GetSystemData( rData );
    }

    return bRet;
}