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193 lines
7.6 KiB
193 lines
7.6 KiB
//C- -------------------------------------------------------------------
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//C- DjVuLibre-3.5
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//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
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//C- Copyright (c) 2001 AT&T
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//C-
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//C- This software is subject to, and may be distributed under, the
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//C- GNU General Public License, Version 2. The license should have
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//C- accompanied the software or you may obtain a copy of the license
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//C- from the Free Software Foundation at http://www.fsf.org .
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//C-
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//C- This program is distributed in the hope that it will be useful,
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//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
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//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//C- GNU General Public License for more details.
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//C-
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//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
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//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
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//C- Software authorized us to replace the original DjVu(r) Reference
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//C- Library notice by the following text (see doc/lizard2002.djvu):
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//C-
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//C- ------------------------------------------------------------------
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//C- | DjVu (r) Reference Library (v. 3.5)
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//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
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//C- | The DjVu Reference Library is protected by U.S. Pat. No.
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//C- | 6,058,214 and patents pending.
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//C- |
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//C- | This software is subject to, and may be distributed under, the
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//C- | GNU General Public License, Version 2. The license should have
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//C- | accompanied the software or you may obtain a copy of the license
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//C- | from the Free Software Foundation at http://www.fsf.org .
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//C- |
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//C- | The computer code originally released by LizardTech under this
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//C- | license and unmodified by other parties is deemed "the LIZARDTECH
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//C- | ORIGINAL CODE." Subject to any third party intellectual property
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//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
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//C- | non-exclusive license to make, use, sell, or otherwise dispose of
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//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
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//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
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//C- | General Public License. This grant only confers the right to
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//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
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//C- | the extent such infringement is reasonably necessary to enable
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//C- | recipient to make, have made, practice, sell, or otherwise dispose
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//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
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//C- | any greater extent that may be necessary to utilize further
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//C- | modifications or combinations.
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//C- |
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//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
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//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
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//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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//C- +------------------------------------------------------------------
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//
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// $Id: DjVuInfo.h,v 1.12 2003/11/07 22:08:21 leonb Exp $
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// $Name: release_3_5_15 $
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#ifndef _DJVUINFO_H
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#define _DJVUINFO_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if NEED_GNUG_PRAGMAS
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# pragma interface
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#endif
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/** @name DjVuInfo.h
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Each instance of class #DjVuInfo# represents the information
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contained in the information chunk of a DjVu file. This #"INFO"#
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chunk is always the first chunk of a DjVu file.
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@memo
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DjVu information chunk.
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@author
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L\'eon Bottou <leonb@research.att.com>
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@version
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#$Id: DjVuInfo.h,v 1.12 2003/11/07 22:08:21 leonb Exp $# */
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//@{
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#include "GSmartPointer.h"
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#include "GRect.h"
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#ifdef HAVE_NAMESPACES
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namespace DJVU {
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# ifdef NOT_DEFINED // Just to fool emacs c++ mode
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}
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#endif
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#endif
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class ByteStream;
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/** @name DjVu version constants
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@memo DjVu file format version. */
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//@{
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/** Current DjVu format version. The value of this macro represents the
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version of the DjVu file format implemented by this release of the DjVu
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Reference Library. */
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#define DJVUVERSION 25
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/** DjVu format version. This is the value used in files produced
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with DjVuLibre. This is smaller than DJVUVERSION because version
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number inflation causes problems with older software.
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*/
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#define DJVUVERSION_FOR_OUTPUT 24
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/** This is the version which introduced orientations. */
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#define DJVUVERSION_ORIENTATION 22
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/** Oldest DjVu format version supported by this library. This release of the
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library cannot completely decode DjVu files whose version field is less
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than or equal to this number. */
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#define DJVUVERSION_TOO_OLD 15
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/** Newest DjVu format partially supported by this library. This release of
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the library will attempt to decode files whose version field is smaller
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than this macro. If the version field is greater than or equal to this
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number, the decoder will just throw a \Ref{GException}. */
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#define DJVUVERSION_TOO_NEW 50
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//@}
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class GUTF8String;
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/** Information component.
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Each instance of class #DjVuInfo# represents the information
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contained in the information chunk of a DjVu file. This #"INFO"#
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chunk is always the first chunk of a DjVu file.
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*/
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class DjVuInfo : public GPEnabled
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{
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protected:
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DjVuInfo(void);
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public:
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/** Creates an empty DjVuInfo object.
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The #width# and #height# fields are set to zero.
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All other fields are initialized with suitable default values. */
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static GP<DjVuInfo> create(void) {return new DjVuInfo();}
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/** Decodes the DjVu #"INFO"# chunk. This function reads binary data from
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ByteStream #bs# and populates the fields of this DjVuInfo object. It is
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normally called after detecting an #"INFO"# chunk header with function
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\Ref{IFFByteStream::get_chunk}. */
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void decode(ByteStream &bs);
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/** Encodes the DjVu #"INFO"# chunk. This function writes the fields of this
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DjVuInfo object into ByteStream #bs#. It is normally called after
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creating an #"INFO"# chunk header with function
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\Ref{IFFByteStream::put_chunk}. */
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void encode(ByteStream &bs);
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/** Returns the number of bytes used by this object. */
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unsigned int get_memory_usage() const;
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/** Width of the DjVu image (in pixels). */
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int width;
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/** Height of the DjVu image (in pixels). */
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int height;
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/** DjVu file version number. This number characterizes the file format
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version used by the encoder to generate this DjVu image. A decoder
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should compare this version number with the constants described in
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section "\Ref{DjVu version constants}". */
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int version;
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/** Resolution of the DjVu image. The resolution is given in ``pixels per
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2.54 centimeters'' (this unit is sometimes called ``pixels per
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inch''). Display programs can use this information to determine the
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natural magnification to use for rendering a DjVu image. */
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int dpi;
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/** Gamma coefficient of the display for which the image was designed. The
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rendering functions can use this information in order to perform color
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correction for the intended display device. */
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double gamma;
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/** The following boolian values are stored in the last character of the
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info structure. Unused bits are reserved for possible future extensions
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and backwards compatability. */
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bool compressable;
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enum {COMPRESSABLE_FLAG=0x80,RESERVED_FLAGS1=0x7f};
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/** We also store the current image orientation as three bits. */
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GRect::Orientations orientation;
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/// Obtain the flags for the default specifications.
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GUTF8String get_paramtags(void) const;
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/// Obtain the flags for the default specifications.
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void writeParam(ByteStream &out_str) const;
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};
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//@}
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// ----- THE END
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#ifdef HAVE_NAMESPACES
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}
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# ifndef NOT_USING_DJVU_NAMESPACE
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using namespace DJVU;
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# endif
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#endif
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#endif
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