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 #ifdef __GNUG__
  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 extern "C"
  51 {
  52
  53 tsize_t TIFFLINKAGEMODE
  54 _tiffNullProc(thandle_t WXUNUSED(handle),
  55           tdata_t WXUNUSED(buf),
  56           tsize_t WXUNUSED(size))
  57 {
  58     return (tsize_t) -1;
  59 }
  60
  61 tsize_t TIFFLINKAGEMODE
  62 _tiffReadProc(thandle_t handle, tdata_t buf, tsize_t size)
  63 {
  64     wxInputStream *stream = (wxInputStream*) handle;
  65     stream->Read( (void*) buf, (size_t) size );
  66     return stream->LastRead();
  67 }
  68
  69 tsize_t TIFFLINKAGEMODE
  70 _tiffWriteProc(thandle_t handle, tdata_t buf, tsize_t size)
  71 {
  72     wxOutputStream *stream = (wxOutputStream*) handle;
  73     stream->Write( (void*) buf, (size_t) size );
  74     return stream->LastWrite();
  75 }
  76
  77 toff_t TIFFLINKAGEMODE
  78 _tiffSeekIProc(thandle_t handle, toff_t off, int whence)
  79 {
  80     wxInputStream *stream = (wxInputStream*) handle;
  81     wxSeekMode mode;
  82     switch (whence)
  83     {
  84         case SEEK_SET: mode = wxFromStart; break;
  85         case SEEK_CUR: mode = wxFromCurrent; break;
  86         case SEEK_END: mode = wxFromEnd; break;
  87         default:       mode = wxFromCurrent; break;
  88     }
  89
  90     return (toff_t)stream->SeekI( (off_t)off, mode );
  91 }
  92
  93 toff_t TIFFLINKAGEMODE
  94 _tiffSeekOProc(thandle_t handle, toff_t off, int whence)
  95 {
  96     wxOutputStream *stream = (wxOutputStream*) handle;
  97     wxSeekMode mode;
  98     switch (whence)
  99     {
 100         case SEEK_SET: mode = wxFromStart; break;
 101         case SEEK_CUR: mode = wxFromCurrent; break;
 102         case SEEK_END: mode = wxFromEnd; break;
 103         default:       mode = wxFromCurrent; break;
 104     }
 105
 106     return (toff_t)stream->SeekO( (off_t)off, mode );
 107 }
 108
 109 int TIFFLINKAGEMODE
 110 _tiffCloseProc(thandle_t WXUNUSED(handle))
 111 {
 112     return 0;  // ?
 113 }
 114
 115 toff_t TIFFLINKAGEMODE
 116 _tiffSizeProc(thandle_t handle)
 117 {
 118     wxStreamBase *stream = (wxStreamBase*) handle;
 119     return (toff_t) stream->GetSize();
 120 }
 121
 122 int TIFFLINKAGEMODE
 123 _tiffMapProc(thandle_t WXUNUSED(handle),
 124              tdata_t* WXUNUSED(pbase),
 125              toff_t* WXUNUSED(psize))
 126 {
 127     return 0;
 128 }
 129
 130 void TIFFLINKAGEMODE
 131 _tiffUnmapProc(thandle_t WXUNUSED(handle),
 132                tdata_t WXUNUSED(base),
 133                toff_t WXUNUSED(size))
 134 {
 135 }
 136
 137 } // extern "C"
 138
 139 TIFF*
 140 TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
 141 {
 142     TIFF* tif = TIFFClientOpen(name, mode,
 143         (thandle_t) &stream,
 144         _tiffReadProc, _tiffNullProc,
 145         _tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
 146         _tiffMapProc, _tiffUnmapProc);
 147
 148     return tif;
 149 }
 150
 151 TIFF*
 152 TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
 153 {
 154     TIFF* tif = TIFFClientOpen(name, mode,
 155         (thandle_t) &stream,
 156         _tiffNullProc, _tiffWriteProc,
 157         _tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
 158         _tiffMapProc, _tiffUnmapProc);
 159
 160     return tif;
 161 }
 162
 163 bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
 164 {
 165     if (index == -1)
 166         index = 0;
 167
 168     image->Destroy();
 169
 170     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 171
 172     if (!tif)
 173     {
 174         if (verbose)
 175             wxLogError( _("TIFF: Error loading image.") );
 176
 177         return FALSE;
 178     }
 179
 180     if (!TIFFSetDirectory( tif, (tdir_t)index ))
 181     {
 182         if (verbose)
 183             wxLogError( _("Invalid TIFF image index.") );
 184
 185         TIFFClose( tif );
 186
 187         return FALSE;
 188     }
 189
 190     uint32 w, h;
 191     uint32 npixels;
 192     uint32 *raster;
 193
 194     TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
 195     TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
 196
 197     npixels = w * h;
 198
 199     raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
 200
 201     if (!raster)
 202     {
 203         if (verbose)
 204             wxLogError( _("TIFF: Couldn't allocate memory.") );
 205
 206         TIFFClose( tif );
 207
 208         return FALSE;
 209     }
 210
 211     image->Create( (int)w, (int)h );
 212     if (!image->Ok())
 213     {
 214         if (verbose)
 215             wxLogError( _("TIFF: Couldn't allocate memory.") );
 216
 217         _TIFFfree( raster );
 218         TIFFClose( tif );
 219
 220         return FALSE;
 221     }
 222
 223     if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
 224     {
 225         if (verbose)
 226             wxLogError( _("TIFF: Error reading image.") );
 227
 228         _TIFFfree( raster );
 229         image->Destroy();
 230         TIFFClose( tif );
 231
 232         return FALSE;
 233     }
 234
 235     bool hasmask = FALSE;
 236
 237     unsigned char *ptr = image->GetData();
 238     ptr += w*3*(h-1);
 239     uint32 pos = 0;
 240
 241     for (uint32 i = 0; i < h; i++)
 242     {
 243         for (uint32 j = 0; j < w; j++)
 244         {
 245             unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
 246             if (alpha < 127)
 247             {
 248                 hasmask = TRUE;
 249                 ptr[0] = image->GetMaskRed();
 250                 ptr++;
 251                 ptr[0] = image->GetMaskGreen();
 252                 ptr++;
 253                 ptr[0] = image->GetMaskBlue();
 254                 ptr++;
 255             }
 256             else
 257             {
 258                 ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
 259                 ptr++;
 260                 ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
 261                 ptr++;
 262                 ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
 263                 ptr++;
 264             }
 265             pos++;
 266         }
 267         ptr -= 2*w*3; // subtract line we just added plus one line
 268     }
 269
 270     _TIFFfree( raster );
 271
 272     TIFFClose( tif );
 273
 274     image->SetMask( hasmask );
 275
 276     return TRUE;
 277 }
 278
 279 int wxTIFFHandler::GetImageCount( wxInputStream& stream )
 280 {
 281     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 282
 283     if (!tif)
 284         return 0;
 285
 286     int dircount = 0;  // according to the libtiff docs, dircount should be set to 1 here???
 287     do {
 288         dircount++;
 289     } while (TIFFReadDirectory(tif));
 290
 291     TIFFClose( tif );
 292
 293     return dircount;
 294 }
 295
 296 bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
 297 {
 298     TIFF *tif = TIFFwxOpen( stream, "image", "w" );
 299
 300     if (!tif)
 301     {
 302         if (verbose)
 303             wxLogError( _("TIFF: Error saving image.") );
 304
 305         return FALSE;
 306     }
 307
 308     TIFFSetField(tif, TIFFTAG_IMAGEWIDTH,  (uint32)image->GetWidth());
 309     TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
 310     TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 311     TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
 312     TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
 313     TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 314     TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
 315     TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
 316
 317     tsize_t linebytes = (tsize_t)image->GetWidth() * 3;
 318     unsigned char *buf;
 319
 320     if (TIFFScanlineSize(tif) > linebytes)
 321     {
 322         buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif));
 323         if (!buf)
 324         {
 325             if (verbose)
 326                 wxLogError( _("TIFF: Couldn't allocate memory.") );
 327
 328             TIFFClose( tif );
 329
 330             return FALSE;
 331         }
 332     }
 333     else
 334     {
 335         buf = NULL;
 336     }
 337
 338     TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,
 339         TIFFDefaultStripSize(tif, (uint32) -1));
 340
 341     unsigned char *ptr = image->GetData();
 342     for (int row = 0; row < image->GetHeight(); row++)
 343     {
 344         if (buf)
 345             memcpy(buf, ptr, image->GetWidth());
 346
 347         if (TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0)
 348         {
 349             if (verbose)
 350                 wxLogError( _("TIFF: Error writing image.") );
 351
 352             TIFFClose( tif );
 353             if (buf)
 354                 _TIFFfree(buf);
 355
 356             return FALSE;
 357         }
 358         ptr += image->GetWidth()*3;
 359     }
 360
 361     (void) TIFFClose(tif);
 362
 363     if (buf)
 364     _TIFFfree(buf);
 365
 366     return TRUE;
 367 }
 368
 369 bool wxTIFFHandler::DoCanRead( wxInputStream& stream )
 370 {
 371     unsigned char hdr[2];
 372
 373     stream.Read(&hdr, 2);
 374     stream.SeekI(-2, wxFromCurrent);
 375
 376     return ((hdr[0] == 0x49 && hdr[1] == 0x49) ||
 377             (hdr[0] == 0x4D && hdr[1] == 0x4D));
 378 }
 379
 380
 381 #endif
 382    // wxUSE_LIBTIFF
 383
 384