AOO410/main/filter/source/graphicfilter/eras/eras.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_filter.hxx"

#include <vcl/graph.hxx>
#include <vcl/bmpacc.hxx>
#include <svtools/fltcall.hxx>
#include <svtools/FilterConfigItem.hxx>

//============================ RASWriter ==================================

class RASWriter {

private:

	SvStream*			mpOStm;
	sal_uInt16				mpOStmOldModus;

	sal_Bool				mbStatus;
	BitmapReadAccess*	mpAcc;

	sal_uLong				mnWidth, mnHeight;
	sal_uInt16				mnColors, mnDepth;

	sal_uLong				mnRepCount;
	sal_uInt8				mnRepVal;

	com::sun::star::uno::Reference< com::sun::star::task::XStatusIndicator > xStatusIndicator;

	void				ImplCallback( sal_uLong nCurrentYPos );
	sal_Bool				ImplWriteHeader();
	void				ImplWritePalette();
	void				ImplWriteBody();
	void				ImplPutByte( sal_uInt8 );	// RLE decoding

public:
						RASWriter();
						~RASWriter();

	sal_Bool				WriteRAS( const Graphic& rGraphic, SvStream& rRAS, FilterConfigItem* pFilterConfigItem );
};

//=================== Methoden von RASWriter ==============================

RASWriter::RASWriter() :
	mbStatus	( sal_True ),
	mpAcc		( NULL ),
	mnRepCount	( 0xffffffff )
{
}

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

RASWriter::~RASWriter()
{
}

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

void RASWriter::ImplCallback( sal_uLong nYPos )
{
	if ( xStatusIndicator.is() )
		xStatusIndicator->setValue( (sal_uInt16)( ( 100 * nYPos ) / mnHeight ) );
}

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

sal_Bool RASWriter::WriteRAS( const Graphic& rGraphic, SvStream& rRAS, FilterConfigItem* pFilterConfigItem)
{
	Bitmap	aBmp;

	mpOStm = &rRAS;

	if ( pFilterConfigItem )
	{
		xStatusIndicator = pFilterConfigItem->GetStatusIndicator();
		if ( xStatusIndicator.is() )
		{
			rtl::OUString aMsg;
			xStatusIndicator->start( aMsg, 100 );
		}
	}

	BitmapEx	aBmpEx( rGraphic.GetBitmapEx() );
	aBmp = aBmpEx.GetBitmap();

	if ( aBmp.GetBitCount() == 4 )
		aBmp.Convert( BMP_CONVERSION_8BIT_COLORS );

	mnDepth = aBmp.GetBitCount();

    // export code below only handles three discrete cases
    mnDepth = mnDepth <= 1 ? 1 : mnDepth <= 8 ? 8 : 24;

    mpAcc = aBmp.AcquireReadAccess();
	if ( mpAcc )
	{
		mpOStmOldModus = mpOStm->GetNumberFormatInt();
		mpOStm->SetNumberFormatInt( NUMBERFORMAT_INT_BIGENDIAN );

		if ( ImplWriteHeader() )
		{
			if ( mnDepth <= 8 )
				ImplWritePalette();
			ImplWriteBody();
		}
		aBmp.ReleaseAccess( mpAcc );
	}
	else
		mbStatus = sal_False;

	mpOStm->SetNumberFormatInt( mpOStmOldModus );

	if ( xStatusIndicator.is() )
		xStatusIndicator->end();

	return mbStatus;
}

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

sal_Bool RASWriter::ImplWriteHeader()
{
	mnWidth = mpAcc->Width();
	mnHeight = mpAcc->Height();
	if ( mnDepth <= 8 )
	{
        mnColors = mpAcc->GetPaletteEntryCount();
		if (mnColors == 0)
			mbStatus = sal_False;
	}
		if ( mbStatus && mnWidth && mnHeight && mnDepth )
	{
		*mpOStm << (sal_uInt32)0x59a66a95 << (sal_uInt32)mnWidth << (sal_uInt32)mnHeight
			<< (sal_uInt32)mnDepth
			<< (sal_uInt32)(( ( ( ( mnWidth * mnDepth ) + 15 ) >> 4 ) << 1 ) * mnHeight)
			<< (sal_uInt32)2;

		if ( mnDepth > 8 )
			*mpOStm << (sal_uInt32)0 << (sal_uInt32)0;
		else
		{

			*mpOStm << (sal_uInt32)1 << (sal_uInt32)( mnColors * 3 );
		}
	}
	else mbStatus = sal_False;

	return mbStatus;
}

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

void RASWriter::ImplWritePalette()
{
	sal_uInt16 i;

	for ( i = 0; i < mnColors; *mpOStm << mpAcc->GetPaletteColor( i++ ).GetRed() ) ;
	for ( i = 0; i < mnColors; *mpOStm << mpAcc->GetPaletteColor( i++ ).GetGreen() ) ;
	for ( i = 0; i < mnColors; *mpOStm << mpAcc->GetPaletteColor( i++ ).GetBlue() ) ;
}

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

void RASWriter::ImplWriteBody()
{
	sal_uLong	x, y;

	if ( mnDepth == 24 )
	{
		for ( y = 0; y < mnHeight; y++ )
		{
			ImplCallback( y );								// processing output
			for ( x = 0; x < mnWidth; x++ )
			{
				BitmapColor aColor( mpAcc->GetPixel( y, x ) );
				ImplPutByte( aColor.GetBlue() );			// Format ist BGR
				ImplPutByte( aColor.GetGreen() );
				ImplPutByte( aColor.GetRed() );
			}
			if ( x & 1 ) ImplPutByte( 0 );		// WORD ALIGNMENT ???
		}
	}
	else if ( mnDepth == 8 )
	{
		for ( y = 0; y < mnHeight; y++ )
		{
			ImplCallback( y );								// processing output
			for ( x = 0; x < mnWidth; x++ )
			{
				ImplPutByte ( mpAcc->GetPixelIndex( y, x ) );
			}
			if ( x & 1 ) ImplPutByte( 0 );		// WORD ALIGNMENT ???
		}
	}
	else if ( mnDepth == 1 )
	{
		sal_uInt8 nDat = 0;

		for ( y = 0; y < mnHeight; y++ )
		{
			ImplCallback( y );								// processing output
			for ( x = 0; x < mnWidth; x++ )
			{
				nDat = ( ( nDat << 1 ) | ( mpAcc->GetPixelIndex( y, x ) & 1 ) );
				if ( ( x & 7 ) == 7 )
					ImplPutByte( nDat );
			}
			if ( x & 7 )
				ImplPutByte( sal::static_int_cast< sal_uInt8 >(nDat << ( ( ( x & 7 ) ^ 7 ) + 1)) );// write remaining bits
			if (!( ( x - 1 ) & 0x8 ) )
				ImplPutByte( 0 );				// WORD ALIGNMENT ???
		}
	}
	ImplPutByte( mnRepVal + 1 );	// end of RLE decoding
}

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

void RASWriter::ImplPutByte( sal_uInt8 nPutThis )
{
	if ( mnRepCount == 0xffffffff )
	{
		mnRepCount = 0;
		mnRepVal = nPutThis;
	}
	else
	{
		if ( ( nPutThis == mnRepVal ) && ( mnRepCount != 0xff ) )
			mnRepCount++;
		else
		{
			if ( mnRepCount == 0 )
			{
				*mpOStm << (sal_uInt8)mnRepVal;
				if ( mnRepVal == 0x80 )
					*mpOStm << (sal_uInt8)0;
			}
			else
			{
				*mpOStm << (sal_uInt8)0x80;
				*mpOStm << (sal_uInt8)mnRepCount;
				*mpOStm << (sal_uInt8)mnRepVal;
			}
			mnRepVal = nPutThis;
			mnRepCount = 0;
		}
	}
}

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

// ---------------------
// - exported function -
// ---------------------

extern "C" sal_Bool __LOADONCALLAPI GraphicExport( SvStream& rStream, Graphic& rGraphic, FilterConfigItem* pFilterConfigItem, sal_Bool )
{
	RASWriter aRASWriter;

	return aRASWriter.WriteRAS( rGraphic, rStream, pFilterConfigItem );
}