summaryrefslogtreecommitdiffstats
path: root/sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx
diff options
context:
space:
mode:
Diffstat (limited to 'sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx')
-rw-r--r--sdext/source/pdfimport/xpdfwrapper/pnghelper.hxx84
1 files changed, 84 insertions, 0 deletions
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 <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
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */