84 lines
3.5 KiB
C++
84 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX
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#define INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX
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#include <sal/types.h>
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#include "pdfioutdev_gpl.hxx"
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namespace pdfi
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{
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class PngHelper
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{
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static sal_uInt32 crc_table[ 256 ];
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static bool bCRCTableInit;
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static void initCRCTable();
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static void appendFileHeader( OutputBuffer& o_rOutputBuf );
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static size_t startChunk( const char* pChunkName, OutputBuffer& o_rOut );
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static void endChunk( size_t nStart, OutputBuffer& o_rOut );
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static void set( sal_uInt32 i_nValue, OutputBuffer& o_rOutputBuf, size_t i_nIndex );
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static void append( sal_uInt32 i_nValue, OutputBuffer& o_rOutputBuf )
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{
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size_t nCur = o_rOutputBuf.size();
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o_rOutputBuf.insert( o_rOutputBuf.end(), 4, Output_t(0) );
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set( i_nValue, o_rOutputBuf, nCur );
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}
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static void appendIHDR( OutputBuffer& o_rOutputBuf, int width, int height, int depth, int colortype );
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static void appendIEND( OutputBuffer& o_rOutputBuf );
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public:
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static void updateCRC( sal_uInt32& io_rCRC, const sal_uInt8* i_pBuf, size_t i_nLen );
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static sal_uInt32 getCRC( const sal_uInt8* i_pBuf, size_t i_nLen );
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// deflates the passed buff i_pBuf and appends it to the output vector
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// returns the number of bytes added to the output
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static sal_uInt32 deflateBuffer( const Output_t* i_pBuf, size_t i_nLen, OutputBuffer& o_rOut );
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static void createPng( OutputBuffer& o_rOutputBuf,
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Stream* str,
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int width,
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int height,
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GfxRGB const & zeroColor,
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GfxRGB const & oneColor,
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bool bIsMask
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);
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static void createPng( OutputBuffer& o_rOutputBuf,
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Stream* str,
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int width, int height, GfxImageColorMap* colorMap,
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Stream* maskStr,
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int maskWidth, int maskHeight, GfxImageColorMap* maskColorMap );
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// for one bit masks
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static void createPng( OutputBuffer& o_rOutputBuf,
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Stream* str,
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int width, int height, GfxImageColorMap* colorMap,
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Stream* maskStr,
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int maskWidth, int maskHeight, bool maskInvert );
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};
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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