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* License, v. 2.0. If a copy of the MPL was not distributed with this
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*
* 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
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#ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX
#define INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX
#include <sal/types.h>
#include "pdfioutdev_gpl.hxx"
namespace pdfi
{
class PngHelper
{
static sal_uInt32 crc_table[ 256 ];
static bool bCRCTableInit;
static void initCRCTable();
static void appendFileHeader( OutputBuffer& o_rOutputBuf );
static size_t startChunk(
const char* pChunkName, OutputBuffer& o_rOut );
static void endChunk( size_t nStart, OutputBuffer& o_rOut );
static void set( sal_uInt32 i_nValue, OutputBuffer& o_rOutputBuf, size_t i_nIndex );
static void append( sal_uInt32 i_nValue, OutputBuffer& o_rOutputBuf )
{
size_t nCur = o_rOutputBuf.size();
o_rOutputBuf.insert( o_rOutputBuf.end(), 4, Output_t(0) );
set( i_nValue, o_rOutputBuf, nCur );
}
static void appendIHDR( OutputBuffer& o_rOutputBuf,
int width,
int height,
int depth,
int colortype );
static void appendIEND( OutputBuffer& o_rOutputBuf );
public:
static void updateCRC( sal_uInt32& io_rCRC,
const sal_uInt8* i_pBuf, size_t i_nLen );
static sal_uInt32 getCRC(
const sal_uInt8* i_pBuf, size_t i_nLen );
// deflates the passed buff i_pBuf and appends it to the output vector
// returns the number of bytes added to the output
static sal_uInt32 deflateBuffer(
const Output_t* i_pBuf, size_t i_nLen, OutputBuffer&
;o_rOut );
static void createPng( OutputBuffer& o_rOutputBuf,
Stream* str,
int width,
int height,
GfxRGB const & zeroColor,
GfxRGB const & oneColor,
bool bIsMask
);
static void createPng( OutputBuffer& o_rOutputBuf,
Stream* str,
int width, int height, GfxImageColorMap* colorMap,
Stream* maskStr,
int maskWidth, int maskHeight, GfxImageColorMap* maskColorMap );
// for one bit masks
static void createPng( OutputBuffer& o_rOutputBuf,
Stream* str,
int width, int height, GfxImageColorMap* colorMap,
Stream* maskStr,
int maskWidth, int maskHeight, bool maskInvert );
};
}
#endif
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