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Diffstat (limited to 'kviewshell/plugins/djvu/libdjvu/DjVuInfo.cpp')
| -rw-r--r-- | kviewshell/plugins/djvu/libdjvu/DjVuInfo.cpp | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/kviewshell/plugins/djvu/libdjvu/DjVuInfo.cpp b/kviewshell/plugins/djvu/libdjvu/DjVuInfo.cpp new file mode 100644 index 00000000..13ae6480 --- /dev/null +++ b/kviewshell/plugins/djvu/libdjvu/DjVuInfo.cpp @@ -0,0 +1,205 @@ +//C- -*- C++ -*- +//C- ------------------------------------------------------------------- +//C- DjVuLibre-3.5 +//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun. +//C- Copyright (c) 2001 AT&T +//C- +//C- This software is subject to, and may be distributed under, the +//C- GNU General Public License, Version 2. The license should have +//C- accompanied the software or you may obtain a copy of the license +//C- from the Free Software Foundation at http://www.fsf.org . +//C- +//C- This program is distributed in the hope that it will be useful, +//C- but WITHOUT ANY WARRANTY; without even the implied warranty of +//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +//C- GNU General Public License for more details. +//C- +//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library +//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech +//C- Software authorized us to replace the original DjVu(r) Reference +//C- Library notice by the following text (see doc/lizard2002.djvu): +//C- +//C- ------------------------------------------------------------------ +//C- | DjVu (r) Reference Library (v. 3.5) +//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved. +//C- | The DjVu Reference Library is protected by U.S. Pat. No. +//C- | 6,058,214 and patents pending. +//C- | +//C- | This software is subject to, and may be distributed under, the +//C- | GNU General Public License, Version 2. The license should have +//C- | accompanied the software or you may obtain a copy of the license +//C- | from the Free Software Foundation at http://www.fsf.org . +//C- | +//C- | The computer code originally released by LizardTech under this +//C- | license and unmodified by other parties is deemed "the LIZARDTECH +//C- | ORIGINAL CODE." Subject to any third party intellectual property +//C- | claims, LizardTech grants recipient a worldwide, royalty-free, +//C- | non-exclusive license to make, use, sell, or otherwise dispose of +//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the +//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU +//C- | General Public License. This grant only confers the right to +//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to +//C- | the extent such infringement is reasonably necessary to enable +//C- | recipient to make, have made, practice, sell, or otherwise dispose +//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to +//C- | any greater extent that may be necessary to utilize further +//C- | modifications or combinations. +//C- | +//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY +//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED +//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF +//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. +//C- +------------------------------------------------------------------ +// +// $Id: DjVuInfo.cpp,v 1.9 2003/11/07 22:08:21 leonb Exp $ +// $Name: release_3_5_15 $ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif +#if NEED_GNUG_PRAGMAS +# pragma implementation +#endif + +#include "DjVuInfo.h" +#include "GException.h" +#include "ByteStream.h" +#include "GString.h" + + +#ifdef HAVE_NAMESPACES +namespace DJVU { +# ifdef NOT_DEFINED // Just to fool emacs c++ mode +} +#endif +#endif + +// ---------------------------------------- +// CLASS DJVUINFO + + +#define STRINGIFY(x) STRINGIFY_(x) +#define STRINGIFY_(x) #x + + +DjVuInfo::DjVuInfo() + : width(0), height(0), +#ifdef DJVUVERSION_FOR_OUTPUT + version(DJVUVERSION_FOR_OUTPUT), +#else + version(DJVUVERSION), +#endif + dpi(300), gamma(2.2), compressable(false), orientation(GRect::BULRNR) +{ +} + +void +DjVuInfo::decode(ByteStream &bs) +{ + // Set to default values + width = 0; + height = 0; + version = DJVUVERSION; + dpi = 300; + gamma = 2.2; + compressable=false; + orientation=GRect::BULRNR; + // Read data + unsigned char buffer[10]; + int size = bs.readall((void*)buffer, sizeof(buffer)); + if (size == 0) + G_THROW( ByteStream::EndOfFile ); + if (size < 5) + G_THROW( ERR_MSG("DjVuInfo.corrupt_file") ); + // Analyze data with backward compatibility in mind! + if (size>=2) + width = (buffer[0]<<8) + buffer[1]; + if (size>=4) + height = (buffer[2]<<8) + buffer[3]; + if (size>=5) + version = buffer[4]; + if (size>=6 && buffer[5]!=0xff) + version = (buffer[5]<<8) + buffer[4]; + if (size>=8 && buffer[7]!=0xff) + dpi = (buffer[7]<<8) + buffer[6]; + if (size>=9) + gamma = 0.1 * buffer[8]; + int flags=0; + if (size>=10) + flags = buffer[9]; + // Fixup + if (gamma<0.3) + gamma=0.3; + if (gamma>5.0) + gamma=5.0; + if (dpi < 25 || dpi > 6000) + dpi = 300; + if(flags&COMPRESSABLE_FLAG) + compressable=true; + if(version>=DJVUVERSION_ORIENTATION) + { + orientation=(GRect::Orientations)(flags&((int)GRect::BOTTOM_UP|(int)GRect::MIRROR|(int)GRect::ROTATE90_CW)); + } +} + +void +DjVuInfo::encode(ByteStream &bs) +{ + bs.write16(width); + bs.write16(height); + bs.write8(version & 0xff); + bs.write8(version >> 8); + bs.write8(dpi & 0xff); + bs.write8(dpi >> 8); + bs.write8((int)(10.0*gamma+0.5) ); + unsigned char flags=orientation; + if(compressable) + { + flags|=COMPRESSABLE_FLAG; + } + bs.write8(flags); +} + +unsigned int +DjVuInfo::get_memory_usage() const +{ + return sizeof(DjVuInfo); +} + +GUTF8String +DjVuInfo::get_paramtags(void) const +{ + const int angle=GRect::findangle(orientation); + GUTF8String retval; + if(angle) + { + retval+="<PARAM name=\"ROTATE\" value=\""+GUTF8String(angle)+"\" />\n"; + } + if(orientation == GRect::rotate(angle,GRect::TDLRNR)) + { + retval+="<PARAM name=\"VFLIP\" value=\"true\" />\n"; + } + if(dpi) + { + retval+="<PARAM name=\"DPI\" value=\""+GUTF8String(dpi)+"\" />\n"; + } + if(gamma) + { + retval+="<PARAM name=\"GAMMA\" value=\""+GUTF8String(gamma)+"\" />\n"; + } + return retval; +} + +void +DjVuInfo::writeParam(ByteStream &str_out) const +{ + str_out.writestring(get_paramtags()); +} + + +#ifdef HAVE_NAMESPACES +} +# ifndef NOT_USING_DJVU_NAMESPACE +using namespace DJVU; +# endif +#endif |