From 940b4d1848e8c70ab7642901a68594e8016caffc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:51:28 +0200 Subject: Adding upstream version 1:7.0.4. Signed-off-by: Daniel Baumann --- sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx | 84 ++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx (limited to 'sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx') diff --git a/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx b/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx new file mode 100644 index 000000000..e0f2ea98b --- /dev/null +++ b/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx @@ -0,0 +1,84 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * 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 + * 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 . + */ + +#ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX +#define INCLUDED_SDEXT_SOURCE_PDFIMPORT_XPDFWRAPPER_PNGHELPER_HXX + +#include +#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 + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit v1.2.3