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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/svapp.hxx>
#include <vcl/msgbox.hxx>
#include <vcl/window.hxx>
#include <svl/solar.hrc>
#include <vcl/fltcall.hxx>
#include <vcl/FilterConfigItem.hxx>
#include "giflzwc.hxx"
#include <boost/scoped_array.hpp>
// - GIFWriter -
class GIFWriter
{
Bitmap aAccBmp;
SvStream& m_rGIF;
BitmapReadAccess* m_pAcc;
sal_uLong nMinPercent;
sal_uLong nMaxPercent;
sal_uLong nLastPercent;
long nActX;
long nActY;
sal_Int32 nInterlaced;
sal_Bool bStatus;
sal_Bool bTransparent;
void MayCallback( sal_uLong nPercent );
void WriteSignature( sal_Bool bGIF89a );
void WriteGlobalHeader( const Size& rSize );
void WriteLoopExtension( const Animation& rAnimation );
void WriteLogSizeExtension( const Size& rSize100 );
void WriteImageExtension( long nTimer, Disposal eDisposal );
void WriteLocalHeader();
void WritePalette();
void WriteAccess();
void WriteTerminator();
sal_Bool CreateAccess( const BitmapEx& rBmpEx );
void DestroyAccess();
void WriteAnimation( const Animation& rAnimation );
void WriteBitmapEx( const BitmapEx& rBmpEx, const Point& rPoint, sal_Bool bExtended,
long nTimer = 0, Disposal eDisposal = DISPOSE_NOT );
com::sun::star::uno::Reference< com::sun::star::task::XStatusIndicator > xStatusIndicator;
public:
GIFWriter(SvStream &rStream);
~GIFWriter() {}
sal_Bool WriteGIF( const Graphic& rGraphic, FilterConfigItem* pConfigItem );
};
GIFWriter::GIFWriter(SvStream &rStream)
: m_rGIF(rStream)
, m_pAcc(NULL)
, nActX(0)
, nActY(0)
{
}
sal_Bool GIFWriter::WriteGIF(const Graphic& rGraphic, FilterConfigItem* pFilterConfigItem)
{
if ( pFilterConfigItem )
{
xStatusIndicator = pFilterConfigItem->GetStatusIndicator();
if ( xStatusIndicator.is() )
{
OUString aMsg;
xStatusIndicator->start( aMsg, 100 );
}
}
Size aSize100;
const MapMode aMap( rGraphic.GetPrefMapMode() );
sal_Bool bLogSize = ( aMap.GetMapUnit() != MAP_PIXEL );
if( bLogSize )
aSize100 = Application::GetDefaultDevice()->LogicToLogic( rGraphic.GetPrefSize(), aMap, MAP_100TH_MM );
bStatus = sal_True;
nLastPercent = 0;
nInterlaced = 0;
m_pAcc = NULL;
if ( pFilterConfigItem )
nInterlaced = pFilterConfigItem->ReadInt32( "Interlaced", 0 );
m_rGIF.SetNumberFormatInt( NUMBERFORMAT_INT_LITTLEENDIAN );
if( rGraphic.IsAnimated() )
{
const Animation& rAnimation = rGraphic.GetAnimation();
WriteSignature( sal_True );
if ( bStatus )
{
WriteGlobalHeader( rAnimation.GetDisplaySizePixel() );
if( bStatus )
{
WriteLoopExtension( rAnimation );
if( bStatus )
WriteAnimation( rAnimation );
}
}
}
else
{
const sal_Bool bGrafTrans = rGraphic.IsTransparent();
BitmapEx aBmpEx;
if( bGrafTrans )
aBmpEx = rGraphic.GetBitmapEx();
else
aBmpEx = BitmapEx( rGraphic.GetBitmap() );
nMinPercent = 0;
nMaxPercent = 100;
WriteSignature( bGrafTrans || bLogSize );
if( bStatus )
{
WriteGlobalHeader( aBmpEx.GetSizePixel() );
if( bStatus )
WriteBitmapEx( aBmpEx, Point(), bGrafTrans );
}
}
if( bStatus )
{
if( bLogSize )
WriteLogSizeExtension( aSize100 );
WriteTerminator();
}
if ( xStatusIndicator.is() )
xStatusIndicator->end();
return bStatus;
}
void GIFWriter::WriteBitmapEx( const BitmapEx& rBmpEx, const Point& rPoint,
sal_Bool bExtended, long nTimer, Disposal eDisposal )
{
if( CreateAccess( rBmpEx ) )
{
nActX = rPoint.X();
nActY = rPoint.Y();
if( bExtended )
WriteImageExtension( nTimer, eDisposal );
if( bStatus )
{
WriteLocalHeader();
if( bStatus )
{
WritePalette();
if( bStatus )
WriteAccess();
}
}
DestroyAccess();
}
}
void GIFWriter::WriteAnimation( const Animation& rAnimation )
{
const sal_uInt16 nCount = rAnimation.Count();
if( nCount )
{
const double fStep = 100. / nCount;
nMinPercent = 0L;
nMaxPercent = (sal_uLong) fStep;
for( sal_uInt16 i = 0; i < nCount; i++ )
{
const AnimationBitmap& rAnimBmp = rAnimation.Get( i );
WriteBitmapEx( rAnimBmp.aBmpEx, rAnimBmp.aPosPix, sal_True,
rAnimBmp.nWait, rAnimBmp.eDisposal );
nMinPercent = nMaxPercent;
nMaxPercent = (sal_uLong) ( nMaxPercent + fStep );
}
}
}
void GIFWriter::MayCallback( sal_uLong nPercent )
{
if ( xStatusIndicator.is() )
{
if( nPercent >= nLastPercent + 3 )
{
nLastPercent = nPercent;
if ( nPercent <= 100 )
xStatusIndicator->setValue( nPercent );
}
}
}
sal_Bool GIFWriter::CreateAccess( const BitmapEx& rBmpEx )
{
if( bStatus )
{
Bitmap aMask( rBmpEx.GetMask() );
aAccBmp = rBmpEx.GetBitmap();
bTransparent = sal_False;
if( !!aMask )
{
if( aAccBmp.Convert( BMP_CONVERSION_8BIT_TRANS ) )
{
aMask.Convert( BMP_CONVERSION_1BIT_THRESHOLD );
aAccBmp.Replace( aMask, BMP_COL_TRANS );
bTransparent = sal_True;
}
else
aAccBmp.Convert( BMP_CONVERSION_8BIT_COLORS );
}
else
aAccBmp.Convert( BMP_CONVERSION_8BIT_COLORS );
m_pAcc = aAccBmp.AcquireReadAccess();
if( !m_pAcc )
bStatus = sal_False;
}
return bStatus;
}
void GIFWriter::DestroyAccess()
{
aAccBmp.ReleaseAccess( m_pAcc );
m_pAcc = NULL;
}
void GIFWriter::WriteSignature( sal_Bool bGIF89a )
{
if( bStatus )
{
m_rGIF.Write( bGIF89a ? "GIF89a" : "GIF87a" , 6 );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WriteGlobalHeader( const Size& rSize )
{
if( bStatus )
{
// 256 colors
const sal_uInt16 nWidth = (sal_uInt16) rSize.Width();
const sal_uInt16 nHeight = (sal_uInt16) rSize.Height();
const sal_uInt8 cFlags = 128 | ( 7 << 4 );
// write values
m_rGIF.WriteUInt16( nWidth );
m_rGIF.WriteUInt16( nHeight );
m_rGIF.WriteUChar( cFlags );
m_rGIF.WriteUChar( (sal_uInt8) 0x00 );
m_rGIF.WriteUChar( (sal_uInt8) 0x00 );
// write dummy palette with two entries (black/white);
// we do this only because of a bug in Photoshop, since those can't
// read pictures without a global color palette
m_rGIF.WriteUInt16( (sal_uInt16) 0 );
m_rGIF.WriteUInt16( (sal_uInt16) 255 );
m_rGIF.WriteUInt16( (sal_uInt16) 65535 );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WriteLoopExtension( const Animation& rAnimation )
{
DBG_ASSERT( rAnimation.Count() > 0, "Animation has no bitmaps!" );
sal_uInt16 nLoopCount = (sal_uInt16) rAnimation.GetLoopCount();
// if only one run should take place
// the LoopExtension won't be written
// The default in this case is a single run
if( nLoopCount != 1 )
{
// Netscape interprets the LoopCount
// as the sole number of _repetitions_
if( nLoopCount )
nLoopCount--;
const sal_uInt8 cLoByte = (const sal_uInt8) nLoopCount;
const sal_uInt8 cHiByte = (const sal_uInt8) ( nLoopCount >> 8 );
m_rGIF.WriteUChar( (sal_uInt8) 0x21 );
m_rGIF.WriteUChar( (sal_uInt8) 0xff );
m_rGIF.WriteUChar( (sal_uInt8) 0x0b );
m_rGIF.Write( "NETSCAPE2.0", 11 );
m_rGIF.WriteUChar( (sal_uInt8) 0x03 );
m_rGIF.WriteUChar( (sal_uInt8) 0x01 );
m_rGIF.WriteUChar( cLoByte );
m_rGIF.WriteUChar( cHiByte );
m_rGIF.WriteUChar( (sal_uInt8) 0x00 );
}
}
void GIFWriter::WriteLogSizeExtension( const Size& rSize100 )
{
// writer PrefSize in 100th-mm as ApplicationExtension
if( rSize100.Width() && rSize100.Height() )
{
m_rGIF.WriteUChar( (sal_uInt8) 0x21 );
m_rGIF.WriteUChar( (sal_uInt8) 0xff );
m_rGIF.WriteUChar( (sal_uInt8) 0x0b );
m_rGIF.Write( "STARDIV 5.0", 11 );
m_rGIF.WriteUChar( (sal_uInt8) 0x09 );
m_rGIF.WriteUChar( (sal_uInt8) 0x01 );
m_rGIF.WriteUInt32( (sal_uInt32) rSize100.Width() );
m_rGIF.WriteUInt32( (sal_uInt32) rSize100.Height() );
m_rGIF.WriteUChar( (sal_uInt8) 0x00 );
}
}
void GIFWriter::WriteImageExtension( long nTimer, Disposal eDisposal )
{
if( bStatus )
{
const sal_uInt16 nDelay = (sal_uInt16) nTimer;
sal_uInt8 cFlags = 0;
// set Transparency-Flag
if( bTransparent )
cFlags |= 1;
// set Disposal-value
if( eDisposal == DISPOSE_BACK )
cFlags |= ( 2 << 2 );
else if( eDisposal == DISPOSE_PREVIOUS )
cFlags |= ( 3 << 2 );
m_rGIF.WriteUChar( (sal_uInt8) 0x21 );
m_rGIF.WriteUChar( (sal_uInt8) 0xf9 );
m_rGIF.WriteUChar( (sal_uInt8) 0x04 );
m_rGIF.WriteUChar( cFlags );
m_rGIF.WriteUInt16( nDelay );
m_rGIF.WriteUChar( (sal_uInt8) m_pAcc->GetBestPaletteIndex( BMP_COL_TRANS ) );
m_rGIF.WriteUChar( (sal_uInt8) 0x00 );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WriteLocalHeader()
{
if( bStatus )
{
const sal_uInt16 nPosX = (sal_uInt16) nActX;
const sal_uInt16 nPosY = (sal_uInt16) nActY;
const sal_uInt16 nWidth = (sal_uInt16) m_pAcc->Width();
const sal_uInt16 nHeight = (sal_uInt16) m_pAcc->Height();
sal_uInt8 cFlags = (sal_uInt8) ( m_pAcc->GetBitCount() - 1 );
// set Interlaced-Flag
if( nInterlaced )
cFlags |= 0x40;
// set Flag for the local color palette
cFlags |= 0x80;
// alles rausschreiben
m_rGIF.WriteUChar( (sal_uInt8) 0x2c );
m_rGIF.WriteUInt16( nPosX );
m_rGIF.WriteUInt16( nPosY );
m_rGIF.WriteUInt16( nWidth );
m_rGIF.WriteUInt16( nHeight );
m_rGIF.WriteUChar( cFlags );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WritePalette()
{
if( bStatus && m_pAcc->HasPalette() )
{
const sal_uInt16 nCount = m_pAcc->GetPaletteEntryCount();
const sal_uInt16 nMaxCount = ( 1 << m_pAcc->GetBitCount() );
for ( sal_uInt16 i = 0; i < nCount; i++ )
{
const BitmapColor& rColor = m_pAcc->GetPaletteColor( i );
m_rGIF.WriteUChar( rColor.GetRed() );
m_rGIF.WriteUChar( rColor.GetGreen() );
m_rGIF.WriteUChar( rColor.GetBlue() );
}
// fill up the rest with 0
if( nCount < nMaxCount )
m_rGIF.SeekRel( ( nMaxCount - nCount ) * 3 );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WriteAccess()
{
GIFLZWCompressor aCompressor;
const long nWidth = m_pAcc->Width();
const long nHeight = m_pAcc->Height();
boost::scoped_array<sal_uInt8> pBuffer;
const sal_uLong nFormat = m_pAcc->GetScanlineFormat();
sal_Bool bNative = ( BMP_FORMAT_8BIT_PAL == nFormat );
if( !bNative )
pBuffer.reset(new sal_uInt8[ nWidth ]);
if( bStatus && ( 8 == m_pAcc->GetBitCount() ) && m_pAcc->HasPalette() )
{
aCompressor.StartCompression( m_rGIF, m_pAcc->GetBitCount() );
long nY, nT;
for( long i = 0; i < nHeight; ++i )
{
if( nInterlaced )
{
nY = i << 3;
if( nY >= nHeight )
{
nT = i - ( ( nHeight + 7 ) >> 3 );
nY= ( nT << 3 ) + 4;
if( nY >= nHeight )
{
nT -= ( nHeight + 3 ) >> 3;
nY = ( nT << 2 ) + 2;
if ( nY >= nHeight )
{
nT -= ( ( nHeight + 1 ) >> 2 );
nY = ( nT << 1 ) + 1;
}
}
}
}
else
nY = i;
if( bNative )
aCompressor.Compress( m_pAcc->GetScanline( nY ), nWidth );
else
{
for( long nX = 0L; nX < nWidth; nX++ )
pBuffer[ nX ] = m_pAcc->GetPixelIndex( nY, nX );
aCompressor.Compress( pBuffer.get(), nWidth );
}
if ( m_rGIF.GetError() )
bStatus = sal_False;
MayCallback( nMinPercent + ( nMaxPercent - nMinPercent ) * i / nHeight );
if( !bStatus )
break;
}
aCompressor.EndCompression();
if ( m_rGIF.GetError() )
bStatus = sal_False;
}
}
void GIFWriter::WriteTerminator()
{
if( bStatus )
{
m_rGIF.WriteUChar( (sal_uInt8) 0x3b );
if( m_rGIF.GetError() )
bStatus = sal_False;
}
}
// this needs to be kept in sync with
// ImpFilterLibCacheEntry::GetImportFunction() from
// vcl/source/filter/graphicfilter.cxx
#if defined(DISABLE_DYNLOADING)
#define GraphicExport egiGraphicExport
#endif
extern "C" SAL_DLLPUBLIC_EXPORT bool SAL_CALL
GraphicExport( SvStream& rStream, Graphic& rGraphic, FilterConfigItem* pConfigItem )
{
GIFWriter aWriter(rStream);
return aWriter.WriteGIF(rGraphic, pConfigItem);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|