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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 <vcl/graph.hxx>
#include <vcl/bmpacc.hxx>
#include <vcl/fltcall.hxx>
//============================ XPMWriter ==================================
class XPMWriter {
private:
SvStream& m_rOStm; // the output XPM file
sal_Bool mbStatus;
sal_Bool mbTrans;
BitmapReadAccess* mpAcc;
sal_uLong mnWidth, mnHeight; // size in Pixel
sal_uInt16 mnColors;
com::sun::star::uno::Reference< com::sun::star::task::XStatusIndicator > xStatusIndicator;
void ImplCallback( sal_uInt16 nPercent );
sal_Bool ImplWriteHeader();
void ImplWritePalette();
void ImplWriteColor( sal_uInt16 );
void ImplWriteBody();
void ImplWriteNumber( sal_Int32 );
void ImplWritePixel( sal_uLong ) const;
public:
XPMWriter(SvStream& rOStm);
~XPMWriter();
sal_Bool WriteXPM( const Graphic& rGraphic, FilterConfigItem* pFilterConfigItem );
};
//=================== Methoden von XPMWriter ==============================
XPMWriter::XPMWriter(SvStream& rOStm)
: m_rOStm(rOStm)
, mbStatus(sal_True)
, mbTrans(sal_False)
, mpAcc(NULL)
{
}
// ------------------------------------------------------------------------
XPMWriter::~XPMWriter()
{
}
// ------------------------------------------------------------------------
void XPMWriter::ImplCallback( sal_uInt16 nPercent )
{
if ( xStatusIndicator.is() )
{
if ( nPercent <= 100 )
xStatusIndicator->setValue( nPercent );
}
}
// ------------------------------------------------------------------------
sal_Bool XPMWriter::WriteXPM( const Graphic& rGraphic, FilterConfigItem* pFilterConfigItem)
{
Bitmap aBmp;
if ( pFilterConfigItem )
{
xStatusIndicator = pFilterConfigItem->GetStatusIndicator();
if ( xStatusIndicator.is() )
{
OUString aMsg;
xStatusIndicator->start( aMsg, 100 );
}
}
BitmapEx aBmpEx( rGraphic.GetBitmapEx() );
aBmp = aBmpEx.GetBitmap();
if ( rGraphic.IsTransparent() ) // possibly create transparent color
{
mbTrans = sal_True;
if ( aBmp.GetBitCount() >= 8 ) // if necessary convert image to 8 bit
aBmp.Convert( BMP_CONVERSION_8BIT_TRANS );
else
aBmp.Convert( BMP_CONVERSION_4BIT_TRANS );
aBmp.Replace( aBmpEx.GetMask(), BMP_COL_TRANS );
}
else
{
if ( aBmp.GetBitCount() > 8 ) // if necessary convert image to 8 bit
aBmp.Convert( BMP_CONVERSION_8BIT_COLORS );
}
mpAcc = aBmp.AcquireReadAccess();
if ( mpAcc )
{
sal_uInt16 nOStmOldModus = m_rOStm.GetNumberFormatInt();
m_rOStm.SetNumberFormatInt( NUMBERFORMAT_INT_BIGENDIAN );
mnColors = mpAcc->GetPaletteEntryCount();
if ( ImplWriteHeader() )
{
ImplWritePalette();
ImplWriteBody();
m_rOStm << "\x22XPMENDEXT\x22\x0a};";
}
m_rOStm.SetNumberFormatInt(nOStmOldModus);
aBmp.ReleaseAccess( mpAcc );
}
else
mbStatus = sal_False;
if ( xStatusIndicator.is() )
xStatusIndicator->end();
return mbStatus;
}
// ------------------------------------------------------------------------
sal_Bool XPMWriter::ImplWriteHeader()
{
mnWidth = mpAcc->Width();
mnHeight = mpAcc->Height();
if ( mnWidth && mnHeight && mnColors )
{
m_rOStm << "/* XPM */\x0astatic char * image[] = \x0a{\x0a\x22";
ImplWriteNumber( mnWidth );
m_rOStm << (sal_uInt8)32;
ImplWriteNumber( mnHeight );
m_rOStm << (sal_uInt8)32;
ImplWriteNumber( mnColors );
m_rOStm << (sal_uInt8)32;
ImplWriteNumber( ( mnColors > 26 ) ? 2 : 1 );
m_rOStm << "\x22,\x0a";
}
else mbStatus = sal_False;
return mbStatus;
}
// ------------------------------------------------------------------------
void XPMWriter::ImplWritePalette()
{
sal_uInt16 nTransIndex = 0xffff;
if ( mbTrans )
nTransIndex = mpAcc->GetBestPaletteIndex( BMP_COL_TRANS );
for ( sal_uInt16 i = 0; i < mnColors; i++ )
{
m_rOStm << "\x22";
ImplWritePixel( i );
m_rOStm << (sal_uInt8)32;
if ( nTransIndex != i )
{
ImplWriteColor( i );
m_rOStm << "\x22,\x0a";
}
else
m_rOStm << "c none\x22,\x0a";
}
}
// ------------------------------------------------------------------------
void XPMWriter::ImplWriteBody()
{
for ( sal_uLong y = 0; y < mnHeight; y++ )
{
ImplCallback( (sal_uInt16)( ( 100 * y ) / mnHeight ) ); // processing output in percent
m_rOStm << (sal_uInt8)0x22;
for ( sal_uLong x = 0; x < mnWidth; x++ )
{
ImplWritePixel( mpAcc->GetPixelIndex( y, x ) );
}
m_rOStm << "\x22,\x0a";
}
}
// ------------------------------------------------------------------------
// write a decimal number in ascii format into the stream
void XPMWriter::ImplWriteNumber(sal_Int32 nNumber)
{
const OString aNum(OString::valueOf(nNumber));
m_rOStm << aNum.getStr();
}
// ------------------------------------------------------------------------
void XPMWriter::ImplWritePixel( sal_uLong nCol ) const
{
if ( mnColors > 26 )
{
sal_uInt8 nDiff = (sal_uInt8) ( nCol / 26 );
m_rOStm << (sal_uInt8)( nDiff + 'A' );
m_rOStm << (sal_uInt8)( nCol - ( nDiff*26 ) + 'A' );
}
else
m_rOStm << (sal_uInt8)( nCol + 'A' );
}
// ------------------------------------------------------------------------
// write a color value in hex format into the stream
void XPMWriter::ImplWriteColor( sal_uInt16 nNumber )
{
sal_uLong nTmp;
sal_uInt8 j;
m_rOStm << "c #"; // # indicates a following hex value
const BitmapColor& rColor = mpAcc->GetPaletteColor( nNumber );
nTmp = ( rColor.GetRed() << 16 ) | ( rColor.GetGreen() << 8 ) | rColor.GetBlue();
for ( signed char i = 20; i >= 0 ; i-=4 )
{
if ( ( j = (sal_uInt8)( nTmp >> i ) & 0xf ) > 9 )
j += 'A' - 10;
else
j += '0';
m_rOStm << j;
}
}
// ------------------------------------------------------------------------
// ---------------------
// - exported function -
// ---------------------
#if defined(DISABLE_DYNLOADING) || defined(LIBO_MERGELIBS)
#define GraphicExport expGraphicExport
#endif
extern "C" SAL_DLLPUBLIC_EXPORT sal_Bool SAL_CALL
GraphicExport(SvStream& rStream, Graphic& rGraphic, FilterConfigItem* pFilterConfigItem, sal_Bool)
{
XPMWriter aXPMWriter(rStream);
return aXPMWriter.WriteXPM( rGraphic, pFilterConfigItem );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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