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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/bitmapaccess.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 )
{
*static_cast<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 )
{
SAL_WARN_IF( 8 != rBitmap.GetBitCount(), "vcl.gdi", "Bitmap should be 8bpp, not " << rBitmap.GetBitCount() << "bpp" );
SAL_WARN_IF( !rBitmap.HasGreyPalette(), "vcl.gdi", "Bitmap isn't greyscale" );
*static_cast<Bitmap*>(this) = rBitmap;
}
Bitmap AlphaMask::GetBitmap() const
{
return ImplGetBitmap();
}
bool AlphaMask::Erase( sal_uInt8 cTransparency )
{
return Bitmap::Erase( Color( cTransparency, cTransparency, cTransparency ) );
}
bool AlphaMask::Replace( const Bitmap& rMask, sal_uInt8 cReplaceTransparency )
{
BitmapReadAccess* pMaskAcc = ( (Bitmap&) rMask ).AcquireReadAccess();
BitmapWriteAccess* pAcc = AcquireWriteAccess();
bool bRet = 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::ReleaseAccess( pMaskAcc );
ReleaseAccess( pAcc );
return bRet;
}
bool AlphaMask::Replace( sal_uInt8 cSearchTransparency, sal_uInt8 cReplaceTransparency, sal_uLong nTol )
{
BitmapWriteAccess* pAcc = AcquireWriteAccess();
bool bRet = 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 = 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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