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/* libpict
* Copyright (C) 2006 Ariya Hidayat (ariya@kde.org)
* Copyright (C) 2007 Fridrich Strba (fridrich.strba@bluewin.ch)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02111-1301 USA
*
* For further information visit http://libpict.sourceforge.net
*/
/* "This product is not manufactured, approved, or supported by
* Corel Corporation or Corel Corporation Limited."
*/
#include "PictImage.h"
#include "PictHeader.h"
#include "PictXParser.h"
#include "Pict1Parser.h"
#include "Pict2Parser.h"
#include "libpict_utils.h"
#include "PictSVGGenerator.h"
#include <libwpg/libwpg.h>
#include <sstream>
/**
Analyzes the content of an input stream to see if it can be parsed
\param input The input stream
\return A value that indicates whether the content from the input
stream is a WordPerfect Graphics that libpict is able to parse
*/
bool libpict::PictImage::isSupported(WPXInputStream* input)
{
input->seek(0, WPX_SEEK_SET);
PictHeader header;
if(!header.load(input))
return false;
bool retVal = header.isSupported();
return retVal;
}
/**
Parses the input stream content. It will make callbacks to the functions provided by a
PictPaintInterface class implementation when needed. This is often commonly called the
'main parsing routine'.
\param input The input stream
\param painter A PictPainterInterface implementation
\return A value that indicates whether the parsing was successful
*/
bool libpict::PictImage::parse(::WPXInputStream* input, libwpg::WPGPaintInterface* painter, libpict::PictFileFormat fileFormat)
{
PictXParser *parser = 0;
input->seek(0, WPX_SEEK_SET);
Pict_DEBUG_MSG(("Loading header...\n"));
unsigned char tmpMajorVersion = 0x00;
if (fileFormat == Pict_Pict1)
tmpMajorVersion = 0x01;
else if (fileFormat == Pict_Pict2)
tmpMajorVersion = 0x02;
PictHeader header;
if(!header.load(input))
return false;
if(!header.isSupported())
{
Pict_DEBUG_MSG(("Unsupported file format!\n"));
return false;
}
else
{
// seek to the start of document
input->seek(header.startOfDocument(), WPX_SEEK_SET);
tmpMajorVersion = (unsigned char)(header.getVersion());
if (tmpMajorVersion == 0x01)
{
unsigned long returnPosition = header.startOfDocument();
/* Due to a bug in dumping mechanism, we produced
* invalid Pict files by prepending a Pict1 header
* to a valid WP file. Let us check this kind of files,
* so that we can load our own mess too. */
if (header.load(input) && header.isSupported())
{
Pict_DEBUG_MSG(("An invalid input we produced :(\n"));
input->seek(header.startOfDocument() + 16, WPX_SEEK_SET);
tmpMajorVersion = (unsigned char)(header.getVersion());
}
else
input->seek(returnPosition, WPX_SEEK_SET);
}
}
bool retval;
switch (tmpMajorVersion) {
case 0x01: // Pict1
Pict_DEBUG_MSG(("Parsing Pict1\n"));
parser = new Pict1Parser(input, painter);
retval = parser->parse();
break;
case 0x02: // Pict2
Pict_DEBUG_MSG(("Parsing Pict2\n"));
parser = new Pict2Parser(input, painter);
retval = parser->parse();
break;
default: // other :-)
Pict_DEBUG_MSG(("Unknown format\n"));
return false;
}
if (parser)
delete parser;
return retval;
}
/**
Parses the input stream content and generates a valid Scalable Vector Graphics
Provided as a convenience function for applications that support SVG internally.
\param input The input stream
\param output The output string whose content is the resulting SVG
\return A value that indicates whether the SVG generation was successful.
*/
bool libpict::PictImage::generateSVG(::WPXInputStream* input, WPXString& output, libpict::PictFileFormat fileFormat)
{
std::ostringstream tmpOutputStream;
libpict::PictSVGGenerator generator(tmpOutputStream);
bool result = libpict::PictImage::parse(input, &generator, fileFormat);
if (result)
output = WPXString(tmpOutputStream.str().c_str());
else
output = WPXString("");
return result;
}
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