kviewshell

DjVuDumpHelper.cpp

00001 //C-  -*- C++ -*-
00002 //C- -------------------------------------------------------------------
00003 //C- DjVuLibre-3.5
00004 //C- Copyright (c) 2002  Leon Bottou and Yann Le Cun.
00005 //C- Copyright (c) 2001  AT&T
00006 //C-
00007 //C- This software is subject to, and may be distributed under, the
00008 //C- GNU General Public License, Version 2. The license should have
00009 //C- accompanied the software or you may obtain a copy of the license
00010 //C- from the Free Software Foundation at http://www.fsf.org .
00011 //C-
00012 //C- This program is distributed in the hope that it will be useful,
00013 //C- but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 //C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 //C- GNU General Public License for more details.
00016 //C- 
00017 //C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
00018 //C- distributed by Lizardtech Software.  On July 19th 2002, Lizardtech 
00019 //C- Software authorized us to replace the original DjVu(r) Reference 
00020 //C- Library notice by the following text (see doc/lizard2002.djvu):
00021 //C-
00022 //C-  ------------------------------------------------------------------
00023 //C- | DjVu (r) Reference Library (v. 3.5)
00024 //C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
00025 //C- | The DjVu Reference Library is protected by U.S. Pat. No.
00026 //C- | 6,058,214 and patents pending.
00027 //C- |
00028 //C- | This software is subject to, and may be distributed under, the
00029 //C- | GNU General Public License, Version 2. The license should have
00030 //C- | accompanied the software or you may obtain a copy of the license
00031 //C- | from the Free Software Foundation at http://www.fsf.org .
00032 //C- |
00033 //C- | The computer code originally released by LizardTech under this
00034 //C- | license and unmodified by other parties is deemed "the LIZARDTECH
00035 //C- | ORIGINAL CODE."  Subject to any third party intellectual property
00036 //C- | claims, LizardTech grants recipient a worldwide, royalty-free, 
00037 //C- | non-exclusive license to make, use, sell, or otherwise dispose of 
00038 //C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the 
00039 //C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU 
00040 //C- | General Public License.   This grant only confers the right to 
00041 //C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to 
00042 //C- | the extent such infringement is reasonably necessary to enable 
00043 //C- | recipient to make, have made, practice, sell, or otherwise dispose 
00044 //C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to 
00045 //C- | any greater extent that may be necessary to utilize further 
00046 //C- | modifications or combinations.
00047 //C- |
00048 //C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
00049 //C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
00050 //C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
00051 //C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
00052 //C- +------------------------------------------------------------------
00053 // 
00054 // $Id: DjVuDumpHelper.cpp,v 1.9 2003/11/07 22:08:20 leonb Exp $
00055 // $Name: release_3_5_15 $
00056 
00057 #ifdef HAVE_CONFIG_H
00058 # include "config.h"
00059 #endif
00060 #if NEED_GNUG_PRAGMAS
00061 # pragma implementation
00062 #endif
00063 
00064 #include "DjVuDumpHelper.h"
00065 #include "DataPool.h"
00066 #include "DjVmDir.h"
00067 #include "DjVuInfo.h"
00068 #include "IFFByteStream.h"
00069 
00070 
00071 #ifdef HAVE_NAMESPACES
00072 namespace DJVU {
00073 # ifdef NOT_DEFINED // Just to fool emacs c++ mode
00074 }
00075 #endif
00076 #endif
00077 
00078 
00079 #ifdef putchar
00080 #undef putchar
00081 #endif
00082 
00083 struct DjVmInfo
00084 {
00085   GP<DjVmDir> dir;
00086   GPMap<int,DjVmDir::File> map;
00087 };
00088 
00089 inline static void
00090 putchar(ByteStream & str, char ch)
00091 {
00092    str.write(&ch, 1);
00093 }
00094 
00095 // ---------- ROUTINES FOR SUMMARIZING CHUNK DATA
00096 
00097 static void
00098 display_djvu_info(ByteStream & out_str, IFFByteStream &iff,
00099           GUTF8String, size_t size, DjVmInfo&, int)
00100 {
00101   GP<DjVuInfo> ginfo=DjVuInfo::create();
00102   DjVuInfo &info=*ginfo;
00103   info.decode(*iff.get_bytestream());
00104   if (size >= 4)
00105     out_str.format( "DjVu %dx%d", info.width, info.height);
00106   if (size >= 5)
00107     out_str.format( ", v%d", info.version);
00108   if (size >= 8)
00109     out_str.format( ", %d dpi", info.dpi);
00110   if (size >= 8)
00111     out_str.format( ", gamma=%3.1f", info.gamma);
00112 }
00113 
00114 static void
00115 display_djbz(ByteStream & out_str, IFFByteStream &iff,
00116          GUTF8String, size_t, DjVmInfo&, int)
00117 {
00118   out_str.format( "JB2 shared dictionary");
00119 }
00120 
00121 static void
00122 display_fgbz(ByteStream & out_str, IFFByteStream &iff,
00123          GUTF8String, size_t, DjVmInfo&, int)
00124 {
00125   out_str.format( "JB2 colors data");
00126 }
00127 
00128 static void
00129 display_sjbz(ByteStream & out_str, IFFByteStream &iff,
00130          GUTF8String, size_t, DjVmInfo&, int)
00131 {
00132   out_str.format( "JB2 bilevel data");
00133 }
00134 
00135 static void
00136 display_smmr(ByteStream & out_str, IFFByteStream &iff,
00137          GUTF8String, size_t, DjVmInfo&, int)
00138 {
00139   out_str.format( "G4/MMR stencil data");
00140 }
00141 
00142 static void
00143 display_iw4(ByteStream & out_str, IFFByteStream &iff,
00144         GUTF8String, size_t, DjVmInfo&, int)
00145 {
00146   GP<ByteStream> gbs = iff.get_bytestream();
00147   unsigned char serial = gbs->read8();
00148   unsigned char slices = gbs->read8();
00149   out_str.format( "IW4 data #%d, %d slices", serial+1, slices);
00150   if (serial == 0)
00151     {
00152       unsigned char major = gbs->read8();
00153       unsigned char minor = gbs->read8();
00154       unsigned char xhi = gbs->read8();
00155       unsigned char xlo = gbs->read8();
00156       unsigned char yhi = gbs->read8();
00157       unsigned char ylo = gbs->read8();
00158       out_str.format( ", v%d.%d (%s), %dx%d", major & 0x7f, minor,
00159                       (major & 0x80 ? "b&w" : "color"), (xhi<<8)+xlo, (yhi<<8)+ylo );
00160     }
00161 }
00162 
00163 static void
00164 display_djvm_dirm(ByteStream & out_str, IFFByteStream & iff,
00165           GUTF8String head, size_t, DjVmInfo& djvminfo, int)
00166 {
00167   GP<DjVmDir> dir = DjVmDir::create();
00168   dir->decode(iff.get_bytestream());
00169   GPList<DjVmDir::File> list = dir->get_files_list();
00170   if (dir->is_indirect())
00171   {
00172     out_str.format( "Document directory (indirect, %d files %d pages)", 
00173                       dir->get_files_num(), dir->get_pages_num());
00174     for (GPosition p=list; p; ++p)
00175       out_str.format( "\n%s%s -> %s", (const char*)head, 
00176                       (const char*)list[p]->get_load_name(), (const char*)list[p]->get_save_name() );
00177   }
00178   else
00179   {
00180     out_str.format( "Document directory (bundled, %d files %d pages)", 
00181                       dir->get_files_num(), dir->get_pages_num());
00182     djvminfo.dir = dir;
00183     djvminfo.map.empty();
00184     for (GPosition p=list; p; ++p)
00185       djvminfo.map[list[p]->offset] = list[p];
00186   }
00187 }
00188 
00189 static void
00190 display_th44(ByteStream & out_str, IFFByteStream & iff,
00191          GUTF8String, size_t, DjVmInfo & djvminfo, int counter)
00192 {
00193    int start_page=-1;
00194    if (djvminfo.dir)
00195    {
00196       GPList<DjVmDir::File> files_list=djvminfo.dir->get_files_list();
00197       for(GPosition pos=files_list;pos;++pos)
00198       {
00199      GP<DjVmDir::File> frec=files_list[pos];
00200      if (iff.tell()>=frec->offset &&
00201          iff.tell()<frec->offset+frec->size)
00202      {
00203         while(pos && !files_list[pos]->is_page())
00204            ++pos;
00205         if (pos)
00206            start_page=files_list[pos]->get_page_num();
00207         break;
00208      }
00209       }
00210    }
00211    if (start_page>=0)
00212       out_str.format( "Thumbnail icon for page %d", start_page+counter+1);
00213    else
00214       out_str.format( "Thumbnail icon");
00215 }
00216 
00217 static void
00218 display_incl(ByteStream & out_str, IFFByteStream & iff,
00219          GUTF8String, size_t, DjVmInfo&, int)
00220 {
00221    GUTF8String name;
00222    char ch;
00223    while(iff.read(&ch, 1) && ch!='\n')
00224      name += ch;
00225    out_str.format( "Indirection chunk --> {%s}", (const char *) name);
00226 }
00227 
00228 static void
00229 display_anno(ByteStream & out_str, IFFByteStream &iff,
00230          GUTF8String, size_t, DjVmInfo&, int)
00231 {
00232    out_str.format( "Page annotation");
00233    GUTF8String id;
00234    iff.short_id(id);
00235    out_str.format( " (hyperlinks, etc.)");
00236 }
00237 
00238 static void
00239 display_text(ByteStream & out_str, IFFByteStream &iff,
00240          GUTF8String, size_t, DjVmInfo&, int)
00241 {
00242    out_str.format( "Hidden text");
00243    GUTF8String id;
00244    iff.short_id(id);
00245    out_str.format( " (text, etc.)");
00246 }
00247 
00248 struct displaysubr
00249 {
00250   const char *id;
00251   void (*subr)(ByteStream &, IFFByteStream &, GUTF8String,
00252            size_t, DjVmInfo&, int counter);
00253 };
00254  
00255 static displaysubr disproutines[] = 
00256 {
00257   { "DJVU.INFO", display_djvu_info },
00258   { "DJVU.Smmr", display_smmr },
00259   { "DJVU.Sjbz", display_sjbz },
00260   { "DJVU.Djbz", display_djbz },
00261   { "DJVU.FG44", display_iw4 },
00262   { "DJVU.BG44", display_iw4 },
00263   { "DJVU.FGbz", display_fgbz },
00264   { "DJVI.Sjbz", display_sjbz },
00265   { "DJVI.Djbz", display_djbz },
00266   { "DJVI.FGbz", display_fgbz },
00267   { "DJVI.FG44", display_iw4 },
00268   { "DJVI.BG44", display_iw4 },
00269   { "BM44.BM44", display_iw4 },
00270   { "PM44.PM44", display_iw4 },
00271   { "DJVM.DIRM", display_djvm_dirm },
00272   { "THUM.TH44", display_th44 },
00273   { "INCL", display_incl },
00274   { "ANTa", display_anno },
00275   { "ANTz", display_anno },
00276   { "TXTa", display_text },
00277   { "TXTz", display_text },
00278   { 0, 0 },
00279 };
00280 
00281 // ---------- ROUTINES FOR DISPLAYING CHUNK STRUCTURE
00282 
00283 static void
00284 display_chunks(ByteStream & out_str, IFFByteStream &iff,
00285            const GUTF8String &head, DjVmInfo djvminfo)
00286 {
00287   size_t size;
00288   GUTF8String id, fullid;
00289   GUTF8String head2 = head + "  ";
00290   GPMap<int,DjVmDir::File> djvmmap;
00291   int rawoffset;
00292   GMap<GUTF8String, int> counters;
00293   
00294   while ((size = iff.get_chunk(id, &rawoffset)))
00295   {
00296     if (!counters.contains(id)) counters[id]=0;
00297     else counters[id]++;
00298     
00299     GUTF8String msg;
00300     msg.format("%s%s [%d] ", (const char *)head, (const char *)id, size);
00301     out_str.format( "%s", (const char *)msg);
00302     // Display DJVM is when adequate
00303     if (djvminfo.dir)
00304     {
00305       GP<DjVmDir::File> rec = djvminfo.map[rawoffset];
00306       if (rec)
00307         out_str.format( "{%s}", (const char*) rec->get_load_name());
00308     }
00309     // Test chunk type
00310     iff.full_id(fullid);
00311     for (int i=0; disproutines[i].id; i++)
00312       if (fullid == disproutines[i].id || id == disproutines[i].id)
00313       {
00314         int n = msg.length();
00315         while (n++ < 14+(int) head.length()) putchar(out_str, ' ');
00316         if (!iff.composite()) out_str.format( "    ");
00317         (*disproutines[i].subr)(out_str, iff, head2,
00318                                 size, djvminfo, counters[id]);
00319         break;
00320       }
00321       // Default display of composite chunk
00322       out_str.format( "\n");
00323       if (iff.composite())
00324         display_chunks(out_str, iff, head2, djvminfo);
00325       // Terminate
00326       iff.close_chunk();
00327   }
00328 }
00329 
00330 GP<ByteStream>
00331 DjVuDumpHelper::dump(const GP<DataPool> & pool)
00332 {
00333    return dump(pool->get_stream());
00334 }
00335 
00336 GP<ByteStream>
00337 DjVuDumpHelper::dump(GP<ByteStream> gstr)
00338 {
00339    GP<ByteStream> out_str=ByteStream::create();
00340    GUTF8String head="  ";
00341    GP<IFFByteStream> iff=IFFByteStream::create(gstr);
00342    DjVmInfo djvminfo;
00343    display_chunks(*out_str, *iff, head, djvminfo);
00344    return out_str;
00345 }
00346 
00347 
00348 #ifdef HAVE_NAMESPACES
00349 }
00350 # ifndef NOT_USING_DJVU_NAMESPACE
00351 using namespace DJVU;
00352 # endif
00353 #endif
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DjVuDumpHelper.cpp

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