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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* The Contents of this file are made available subject to
* the terms of GNU General Public License Version 2.
*
*
* GNU General Public License, version 2
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
************************************************************************/
#ifndef _IPDF_PNGHELPER_HXX
#define _IPDF_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& zeroColor,
GfxRGB& 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
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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