src/common/imagtiff.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        imagtiff.cpp
   3 // Purpose:     wxImage TIFF handler
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "imagtiff.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18 #pragma hdrstop
  19 #endif
  20
  21 #include "wx/defs.h"
  22
  23 #if wxUSE_IMAGE && wxUSE_LIBTIFF
  24
  25 #include "wx/imagtiff.h"
  26 #include "wx/bitmap.h"
  27 #include "wx/debug.h"
  28 #include "wx/log.h"
  29 #include "wx/app.h"
  30 extern "C"
  31 {
  32     #include "tiff.h"
  33     #include "tiffio.h"
  34 }
  35 #include "wx/filefn.h"
  36 #include "wx/wfstream.h"
  37 #include "wx/intl.h"
  38 #include "wx/module.h"
  39
  40 #ifndef TIFFLINKAGEMODE
  41   #define TIFFLINKAGEMODE LINKAGEMODE
  42 #endif
  43
  44 //-----------------------------------------------------------------------------
  45 // wxTIFFHandler
  46 //-----------------------------------------------------------------------------
  47
  48 IMPLEMENT_DYNAMIC_CLASS(wxTIFFHandler,wxImageHandler)
  49
  50 #if wxUSE_STREAMS
  51
  52 extern "C"
  53 {
  54
  55 tsize_t TIFFLINKAGEMODE
  56 _tiffNullProc(thandle_t WXUNUSED(handle),
  57           tdata_t WXUNUSED(buf),
  58           tsize_t WXUNUSED(size))
  59 {
  60     return (tsize_t) -1;
  61 }
  62
  63 tsize_t TIFFLINKAGEMODE
  64 _tiffReadProc(thandle_t handle, tdata_t buf, tsize_t size)
  65 {
  66     wxInputStream *stream = (wxInputStream*) handle;
  67     stream->Read( (void*) buf, (size_t) size );
  68     return stream->LastRead();
  69 }
  70
  71 tsize_t TIFFLINKAGEMODE
  72 _tiffWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
  73 {
  74     wxOutputStream *stream = (wxOutputStream*) handle;
  75     stream->Write( (void*) buf, (size_t) size );
  76     return stream->LastWrite();
  77 }
  78
  79 toff_t TIFFLINKAGEMODE
  80 _tiffSeekIProc(thandle_t handle, toff_t off, int whence)
  81 {
  82     wxInputStream *stream = (wxInputStream*) handle;
  83     wxSeekMode mode;
  84     switch (whence)
  85     {
  86         case SEEK_SET: mode = wxFromStart; break;
  87         case SEEK_CUR: mode = wxFromCurrent; break;
  88         case SEEK_END: mode = wxFromEnd; break;
  89         default:       mode = wxFromCurrent; break;
  90     }
  91
  92     return (toff_t)stream->SeekI( (wxFileOffset)off, mode );
  93 }
  94
  95 toff_t TIFFLINKAGEMODE
  96 _tiffSeekOProc(thandle_t handle, toff_t off, int whence)
  97 {
  98     wxOutputStream *stream = (wxOutputStream*) handle;
  99     wxSeekMode mode;
 100     switch (whence)
 101     {
 102         case SEEK_SET: mode = wxFromStart; break;
 103         case SEEK_CUR: mode = wxFromCurrent; break;
 104         case SEEK_END: mode = wxFromEnd; break;
 105         default:       mode = wxFromCurrent; break;
 106     }
 107
 108     return (toff_t)stream->SeekO( (wxFileOffset)off, mode );
 109 }
 110
 111 int TIFFLINKAGEMODE
 112 _tiffCloseProc(thandle_t WXUNUSED(handle))
 113 {
 114     return 0;  // ?
 115 }
 116
 117 toff_t TIFFLINKAGEMODE
 118 _tiffSizeProc(thandle_t handle)
 119 {
 120     wxStreamBase *stream = (wxStreamBase*) handle;
 121     return (toff_t) stream->GetSize();
 122 }
 123
 124 int TIFFLINKAGEMODE
 125 _tiffMapProc(thandle_t WXUNUSED(handle),
 126              tdata_t* WXUNUSED(pbase),
 127              toff_t* WXUNUSED(psize))
 128 {
 129     return 0;
 130 }
 131
 132 void TIFFLINKAGEMODE
 133 _tiffUnmapProc(thandle_t WXUNUSED(handle),
 134                tdata_t WXUNUSED(base),
 135                toff_t WXUNUSED(size))
 136 {
 137 }
 138
 139 static void
 140 TIFFwxWarningHandler(const char* module, const char* fmt, va_list ap)
 141 {
 142     if (module != NULL)
 143         wxLogWarning(_("tiff module: %s"), wxString::FromAscii(module).c_str());
 144
 145     // FIXME: this is not terrible informative but better than crashing!
 146 #if wxUSE_UNICODE
 147     wxLogWarning(_("TIFF library warning."));
 148 #else
 149     wxVLogWarning(fmt, ap);
 150 #endif
 151 }
 152
 153 static void
 154 TIFFwxErrorHandler(const char* module, const char* fmt, va_list ap)
 155 {
 156     if (module != NULL)
 157         wxLogError(_("tiff module: %s"), wxString::FromAscii(module).c_str());
 158
 159     // FIXME: as above
 160 #if wxUSE_UNICODE
 161     wxLogError(_("TIFF library error."));
 162 #else
 163     wxVLogError(fmt, ap);
 164 #endif
 165 }
 166
 167 } // extern "C"
 168
 169 TIFF*
 170 TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
 171 {
 172     TIFF* tif = TIFFClientOpen(name, mode,
 173         (thandle_t) &stream,
 174         _tiffReadProc, _tiffNullProc,
 175         _tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
 176         _tiffMapProc, _tiffUnmapProc);
 177
 178     return tif;
 179 }
 180
 181 TIFF*
 182 TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
 183 {
 184     TIFF* tif = TIFFClientOpen(name, mode,
 185         (thandle_t) &stream,
 186         _tiffNullProc, _tiffWriteProc,
 187         _tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
 188         _tiffMapProc, _tiffUnmapProc);
 189
 190     return tif;
 191 }
 192
 193 wxTIFFHandler::wxTIFFHandler()
 194 {
 195     m_name = wxT("TIFF file");
 196     m_extension = wxT("tif");
 197     m_type = wxBITMAP_TYPE_TIF;
 198     m_mime = wxT("image/tiff");
 199     TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
 200     TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
 201 }
 202
 203 bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
 204 {
 205     if (index == -1)
 206         index = 0;
 207
 208     image->Destroy();
 209
 210     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 211
 212     if (!tif)
 213     {
 214         if (verbose)
 215             wxLogError( _("TIFF: Error loading image.") );
 216
 217         return false;
 218     }
 219
 220     if (!TIFFSetDirectory( tif, (tdir_t)index ))
 221     {
 222         if (verbose)
 223             wxLogError( _("Invalid TIFF image index.") );
 224
 225         TIFFClose( tif );
 226
 227         return false;
 228     }
 229
 230     uint32 w, h;
 231     uint32 npixels;
 232     uint32 *raster;
 233
 234     TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
 235     TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
 236
 237     npixels = w * h;
 238
 239     raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
 240
 241     if (!raster)
 242     {
 243         if (verbose)
 244             wxLogError( _("TIFF: Couldn't allocate memory.") );
 245
 246         TIFFClose( tif );
 247
 248         return false;
 249     }
 250
 251     image->Create( (int)w, (int)h );
 252     if (!image->Ok())
 253     {
 254         if (verbose)
 255             wxLogError( _("TIFF: Couldn't allocate memory.") );
 256
 257         _TIFFfree( raster );
 258         TIFFClose( tif );
 259
 260         return false;
 261     }
 262
 263     if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
 264     {
 265         if (verbose)
 266             wxLogError( _("TIFF: Error reading image.") );
 267
 268         _TIFFfree( raster );
 269         image->Destroy();
 270         TIFFClose( tif );
 271
 272         return false;
 273     }
 274
 275     bool hasmask = false;
 276
 277     unsigned char *ptr = image->GetData();
 278     ptr += w*3*(h-1);
 279     uint32 pos = 0;
 280
 281     for (uint32 i = 0; i < h; i++)
 282     {
 283         for (uint32 j = 0; j < w; j++)
 284         {
 285             unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
 286             if (alpha < 127)
 287             {
 288                 hasmask = true;
 289                 ptr[0] = image->GetMaskRed();
 290                 ptr++;
 291                 ptr[0] = image->GetMaskGreen();
 292                 ptr++;
 293                 ptr[0] = image->GetMaskBlue();
 294                 ptr++;
 295             }
 296             else
 297             {
 298                 ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
 299                 ptr++;
 300                 ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
 301                 ptr++;
 302                 ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
 303                 ptr++;
 304             }
 305             pos++;
 306         }
 307         ptr -= 2*w*3; // subtract line we just added plus one line
 308     }
 309
 310     _TIFFfree( raster );
 311
 312     TIFFClose( tif );
 313
 314     image->SetMask( hasmask );
 315
 316     return true;
 317 }
 318
 319 int wxTIFFHandler::GetImageCount( wxInputStream& stream )
 320 {
 321     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 322
 323     if (!tif)
 324         return 0;
 325
 326     int dircount = 0;  // according to the libtiff docs, dircount should be set to 1 here???
 327     do {
 328         dircount++;
 329     } while (TIFFReadDirectory(tif));
 330
 331     TIFFClose( tif );
 332
 333     return dircount;
 334 }
 335
 336 bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
 337 {
 338     TIFF *tif = TIFFwxOpen( stream, "image", "w" );
 339
 340     if (!tif)
 341     {
 342         if (verbose)
 343             wxLogError( _("TIFF: Error saving image.") );
 344
 345         return false;
 346     }
 347
 348     TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 349     TIFFSetField(tif, TIFFTAG_IMAGEWIDTH,  (uint32)image->GetWidth());
 350     TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
 351     TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 352     TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 353
 354     if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONX) &&
 355             image->HasOption(wxIMAGE_OPTION_RESOLUTIONY) )
 356     {
 357         TIFFSetField(tif, TIFFTAG_XRESOLUTION,
 358                         (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX));
 359         TIFFSetField(tif, TIFFTAG_YRESOLUTION,
 360                         (float)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY));
 361     }
 362
 363     int spp = image->GetOptionInt(wxIMAGE_OPTION_SAMPLESPERPIXEL);
 364     if ( !spp )
 365         spp = 3;
 366
 367     int bpp = image->GetOptionInt(wxIMAGE_OPTION_BITSPERSAMPLE);
 368     if ( !bpp )
 369         bpp=8;
 370
 371     int compression = image->GetOptionInt(wxIMAGE_OPTION_COMPRESSION);
 372     if ( !compression )
 373         compression=COMPRESSION_LZW;
 374
 375     TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, spp);
 376     TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bpp);
 377     TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, spp*bpp == 1 ? PHOTOMETRIC_MINISBLACK
 378                                                         : PHOTOMETRIC_RGB);
 379     TIFFSetField(tif, TIFFTAG_COMPRESSION, compression);
 380
 381     // scanlinesize if determined by spp and bpp
 382     tsize_t linebytes = (tsize_t)image->GetWidth() * spp * bpp / 8;
 383
 384     if ( (image->GetWidth() % 8 > 0) && (spp * bpp < 8) )
 385         linebytes+=1;
 386
 387     unsigned char *buf;
 388
 389     if (TIFFScanlineSize(tif) > linebytes || (spp * bpp < 24))
 390     {
 391         buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif));
 392         if (!buf)
 393         {
 394             if (verbose)
 395                 wxLogError( _("TIFF: Couldn't allocate memory.") );
 396
 397             TIFFClose( tif );
 398
 399             return false;
 400         }
 401     }
 402     else
 403     {
 404         buf = NULL;
 405     }
 406
 407     TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,TIFFDefaultStripSize(tif, (uint32) -1));
 408
 409     unsigned char *ptr = image->GetData();
 410     for ( int row = 0; row < image->GetHeight(); row++ )
 411     {
 412         if ( buf )
 413         {
 414             if ( spp * bpp > 1 )
 415             {
 416                 // color image
 417                 memcpy(buf, ptr, image->GetWidth());
 418             }
 419             else // black and white image
 420             {
 421                 for ( int column = 0; column < linebytes; column++ )
 422                 {
 423                     uint8 reverse = 0;
 424                     for ( int bp = 0; bp < 8; bp++ )
 425                     {
 426                         if ( ptr[column*24 + bp*3] > 0 )
 427                         {
 428                             // check only red as this is sufficient
 429                             reverse = reverse | 128 >> bp;
 430                         }
 431                     }
 432
 433                     buf[column] = reverse;
 434                 }
 435             }
 436         }
 437
 438         if ( TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0 )
 439         {
 440             if (verbose)
 441                 wxLogError( _("TIFF: Error writing image.") );
 442
 443             TIFFClose( tif );
 444             if (buf)
 445                 _TIFFfree(buf);
 446
 447             return false;
 448         }
 449
 450         ptr += image->GetWidth()*3;
 451     }
 452
 453     (void) TIFFClose(tif);
 454
 455     if (buf)
 456         _TIFFfree(buf);
 457
 458     return true;
 459 }
 460
 461 bool wxTIFFHandler::DoCanRead( wxInputStream& stream )
 462 {
 463     unsigned char hdr[2];
 464
 465     if ( !stream.Read(&hdr[0], WXSIZEOF(hdr)) )
 466         return false;
 467
 468     return (hdr[0] == 'I' && hdr[1] == 'I') ||
 469            (hdr[0] == 'M' && hdr[1] == 'M');
 470 }
 471
 472 #endif  // wxUSE_STREAMS
 473
 474 #endif  // wxUSE_LIBTIFF
 475