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Diffstat (limited to 'sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx')
-rw-r--r-- | sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx b/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx new file mode 100644 index 000000000000..c7b050869554 --- /dev/null +++ b/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx @@ -0,0 +1,95 @@ +/* -*- 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: */ |