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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#include <tools/debug.hxx>
#include <vcl/bmpacc.hxx>
#include <tools/color.hxx>
#include <vcl/alpha.hxx>
AlphaMask::AlphaMask()
{
}
AlphaMask::AlphaMask( const Bitmap& rBitmap ) :
Bitmap( rBitmap )
{
if( !!rBitmap )
Bitmap::Convert( BMP_CONVERSION_8BIT_GREYS );
}
AlphaMask::AlphaMask( const AlphaMask& rAlphaMask ) :
Bitmap( rAlphaMask )
{
}
AlphaMask::AlphaMask( const Size& rSizePixel, sal_uInt8* pEraseTransparency ) :
Bitmap( rSizePixel, 8, &Bitmap::GetGreyPalette( 256 ) )
{
if( pEraseTransparency )
Bitmap::Erase( Color( *pEraseTransparency, *pEraseTransparency, *pEraseTransparency ) );
}
AlphaMask::~AlphaMask()
{
}
AlphaMask& AlphaMask::operator=( const Bitmap& rBitmap )
{
*(Bitmap*) this = rBitmap;
if( !!rBitmap )
Bitmap::Convert( BMP_CONVERSION_8BIT_GREYS );
return *this;
}
const Bitmap& AlphaMask::ImplGetBitmap() const
{
return( (const Bitmap&) *this );
}
void AlphaMask::ImplSetBitmap( const Bitmap& rBitmap )
{
DBG_ASSERT( ( 8 == rBitmap.GetBitCount() ) && rBitmap.HasGreyPalette(), "AlphaMask::ImplSetBitmap: invalid bitmap" );
*(Bitmap*) this = rBitmap;
}
Bitmap AlphaMask::GetBitmap() const
{
return ImplGetBitmap();
}
sal_Bool AlphaMask::CopyPixel( const Rectangle& rRectDst, const Rectangle& rRectSrc,
const AlphaMask* pAlphaSrc )
{
// Note: this code is copied from Bitmap::CopyPixel but avoids any palette lookups
// This optimization is possible because the palettes of AlphaMasks are always identical (8bit GreyPalette, see ctor)
const Size aSizePix( GetSizePixel() );
Rectangle aRectDst( rRectDst );
sal_Bool bRet = sal_False;
aRectDst.Intersection( Rectangle( Point(), aSizePix ) );
if( !aRectDst.IsEmpty() )
{
if( pAlphaSrc && ( *pAlphaSrc != *this ) )
{
Bitmap* pSrc = (Bitmap*) pAlphaSrc;
const Size aCopySizePix( pSrc->GetSizePixel() );
Rectangle aRectSrc( rRectSrc );
aRectSrc.Intersection( Rectangle( Point(), aCopySizePix ) );
if( !aRectSrc.IsEmpty() )
{
BitmapReadAccess* pReadAcc = pSrc->AcquireReadAccess();
if( pReadAcc )
{
BitmapWriteAccess* pWriteAcc = AcquireWriteAccess();
if( pWriteAcc )
{
const long nWidth = std::min( aRectSrc.GetWidth(), aRectDst.GetWidth() );
const long nHeight = std::min( aRectSrc.GetHeight(), aRectDst.GetHeight() );
const long nSrcEndX = aRectSrc.Left() + nWidth;
const long nSrcEndY = aRectSrc.Top() + nHeight;
long nDstY = aRectDst.Top();
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 = std::min( aRectSrc.GetWidth(), aRectDst.GetWidth() );
const long nHeight = std::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 AlphaMask::Erase( sal_uInt8 cTransparency )
{
return Bitmap::Erase( Color( cTransparency, cTransparency, cTransparency ) );
}
sal_Bool AlphaMask::Replace( const Bitmap& rMask, sal_uInt8 cReplaceTransparency )
{
BitmapReadAccess* pMaskAcc = ( (Bitmap&) rMask ).AcquireReadAccess();
BitmapWriteAccess* pAcc = AcquireWriteAccess();
sal_Bool bRet = sal_False;
if( pMaskAcc && pAcc )
{
const BitmapColor aReplace( cReplaceTransparency );
const long nWidth = std::min( pMaskAcc->Width(), pAcc->Width() );
const long nHeight = std::min( pMaskAcc->Height(), pAcc->Height() );
const BitmapColor aMaskWhite( pMaskAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );
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 );
}
( (Bitmap&) rMask ).ReleaseAccess( pMaskAcc );
ReleaseAccess( pAcc );
return bRet;
}
sal_Bool AlphaMask::Replace( sal_uInt8 cSearchTransparency, sal_uInt8 cReplaceTransparency, sal_uLong
#ifdef DBG_UTIL
nTol
#endif
)
{
BitmapWriteAccess* pAcc = AcquireWriteAccess();
sal_Bool bRet = sal_False;
DBG_ASSERT( !nTol, "AlphaMask::Replace: nTol not used yet" );
if( pAcc && pAcc->GetBitCount() == 8 )
{
const long nWidth = pAcc->Width(), nHeight = pAcc->Height();
if( pAcc->GetScanlineFormat() == BMP_FORMAT_8BIT_PAL )
{
for( long nY = 0L; nY < nHeight; nY++ )
{
Scanline pScan = pAcc->GetScanline( nY );
for( long nX = 0L; nX < nWidth; nX++, pScan++ )
{
if( *pScan == cSearchTransparency )
*pScan = cReplaceTransparency;
}
}
}
else
{
BitmapColor aReplace( cReplaceTransparency );
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
if( pAcc->GetPixel( nY, nX ).GetIndex() == cSearchTransparency )
pAcc->SetPixel( nY, nX, aReplace );
}
}
}
bRet = sal_True;
}
if( pAcc )
ReleaseAccess( pAcc );
return bRet;
}
void AlphaMask::ReleaseAccess( BitmapReadAccess* pAccess )
{
if( pAccess )
{
Bitmap::ReleaseAccess( pAccess );
Bitmap::Convert( BMP_CONVERSION_8BIT_GREYS );
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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