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( (off_t)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( (off_t)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"), module);
 144     wxLogWarning((wxChar *) fmt, ap);
 145 }
 146
 147 static void
 148 TIFFwxErrorHandler(const char* module, const char* fmt, va_list ap)
 149 {
 150     if (module != NULL)
 151             wxLogError(_("tiff module: %s"), module);
 152     wxVLogError((wxChar *) fmt, ap);
 153 }
 154
 155 } // extern "C"
 156
 157 TIFF*
 158 TIFFwxOpen(wxInputStream &stream, const char* name, const char* mode)
 159 {
 160     TIFF* tif = TIFFClientOpen(name, mode,
 161         (thandle_t) &stream,
 162         _tiffReadProc, _tiffNullProc,
 163         _tiffSeekIProc, _tiffCloseProc, _tiffSizeProc,
 164         _tiffMapProc, _tiffUnmapProc);
 165
 166     return tif;
 167 }
 168
 169 TIFF*
 170 TIFFwxOpen(wxOutputStream &stream, const char* name, const char* mode)
 171 {
 172     TIFF* tif = TIFFClientOpen(name, mode,
 173         (thandle_t) &stream,
 174         _tiffNullProc, _tiffWriteProc,
 175         _tiffSeekOProc, _tiffCloseProc, _tiffSizeProc,
 176         _tiffMapProc, _tiffUnmapProc);
 177
 178     return tif;
 179 }
 180
 181 wxTIFFHandler::wxTIFFHandler()
 182 {
 183     m_name = wxT("TIFF file");
 184     m_extension = wxT("tif");
 185     m_type = wxBITMAP_TYPE_TIF;
 186     m_mime = wxT("image/tiff");
 187     TIFFSetWarningHandler((TIFFErrorHandler) TIFFwxWarningHandler);
 188     TIFFSetErrorHandler((TIFFErrorHandler) TIFFwxErrorHandler);
 189 }
 190
 191 bool wxTIFFHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int index )
 192 {
 193     if (index == -1)
 194         index = 0;
 195
 196     image->Destroy();
 197
 198     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 199
 200     if (!tif)
 201     {
 202         if (verbose)
 203             wxLogError( _("TIFF: Error loading image.") );
 204
 205         return false;
 206     }
 207
 208     if (!TIFFSetDirectory( tif, (tdir_t)index ))
 209     {
 210         if (verbose)
 211             wxLogError( _("Invalid TIFF image index.") );
 212
 213         TIFFClose( tif );
 214
 215         return false;
 216     }
 217
 218     uint32 w, h;
 219     uint32 npixels;
 220     uint32 *raster;
 221
 222     TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
 223     TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
 224
 225     npixels = w * h;
 226
 227     raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
 228
 229     if (!raster)
 230     {
 231         if (verbose)
 232             wxLogError( _("TIFF: Couldn't allocate memory.") );
 233
 234         TIFFClose( tif );
 235
 236         return false;
 237     }
 238
 239     image->Create( (int)w, (int)h );
 240     if (!image->Ok())
 241     {
 242         if (verbose)
 243             wxLogError( _("TIFF: Couldn't allocate memory.") );
 244
 245         _TIFFfree( raster );
 246         TIFFClose( tif );
 247
 248         return false;
 249     }
 250
 251     if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
 252     {
 253         if (verbose)
 254             wxLogError( _("TIFF: Error reading image.") );
 255
 256         _TIFFfree( raster );
 257         image->Destroy();
 258         TIFFClose( tif );
 259
 260         return false;
 261     }
 262
 263     bool hasmask = false;
 264
 265     unsigned char *ptr = image->GetData();
 266     ptr += w*3*(h-1);
 267     uint32 pos = 0;
 268
 269     for (uint32 i = 0; i < h; i++)
 270     {
 271         for (uint32 j = 0; j < w; j++)
 272         {
 273             unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
 274             if (alpha < 127)
 275             {
 276                 hasmask = true;
 277                 ptr[0] = image->GetMaskRed();
 278                 ptr++;
 279                 ptr[0] = image->GetMaskGreen();
 280                 ptr++;
 281                 ptr[0] = image->GetMaskBlue();
 282                 ptr++;
 283             }
 284             else
 285             {
 286                 ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
 287                 ptr++;
 288                 ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
 289                 ptr++;
 290                 ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
 291                 ptr++;
 292             }
 293             pos++;
 294         }
 295         ptr -= 2*w*3; // subtract line we just added plus one line
 296     }
 297
 298     _TIFFfree( raster );
 299
 300     TIFFClose( tif );
 301
 302     image->SetMask( hasmask );
 303
 304     return true;
 305 }
 306
 307 int wxTIFFHandler::GetImageCount( wxInputStream& stream )
 308 {
 309     TIFF *tif = TIFFwxOpen( stream, "image", "r" );
 310
 311     if (!tif)
 312         return 0;
 313
 314     int dircount = 0;  // according to the libtiff docs, dircount should be set to 1 here???
 315     do {
 316         dircount++;
 317     } while (TIFFReadDirectory(tif));
 318
 319     TIFFClose( tif );
 320
 321     return dircount;
 322 }
 323
 324 bool wxTIFFHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
 325 {
 326     TIFF *tif = TIFFwxOpen( stream, "image", "w" );
 327
 328     if (!tif)
 329     {
 330         if (verbose)
 331             wxLogError( _("TIFF: Error saving image.") );
 332
 333         return false;
 334     }
 335
 336     TIFFSetField(tif, TIFFTAG_IMAGEWIDTH,  (uint32)image->GetWidth());
 337     TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32)image->GetHeight());
 338     TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 339     TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
 340     TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
 341     TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 342     TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
 343     TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_LZW);
 344
 345     tsize_t linebytes = (tsize_t)image->GetWidth() * 3;
 346     unsigned char *buf;
 347
 348     if (TIFFScanlineSize(tif) > linebytes)
 349     {
 350         buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(tif));
 351         if (!buf)
 352         {
 353             if (verbose)
 354                 wxLogError( _("TIFF: Couldn't allocate memory.") );
 355
 356             TIFFClose( tif );
 357
 358             return false;
 359         }
 360     }
 361     else
 362     {
 363         buf = NULL;
 364     }
 365
 366     TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,
 367         TIFFDefaultStripSize(tif, (uint32) -1));
 368
 369     unsigned char *ptr = image->GetData();
 370     for (int row = 0; row < image->GetHeight(); row++)
 371     {
 372         if (buf)
 373             memcpy(buf, ptr, image->GetWidth());
 374
 375         if (TIFFWriteScanline(tif, buf ? buf : ptr, (uint32)row, 0) < 0)
 376         {
 377             if (verbose)
 378                 wxLogError( _("TIFF: Error writing image.") );
 379
 380             TIFFClose( tif );
 381             if (buf)
 382                 _TIFFfree(buf);
 383
 384             return false;
 385         }
 386         ptr += image->GetWidth()*3;
 387     }
 388
 389     (void) TIFFClose(tif);
 390
 391     if (buf)
 392     _TIFFfree(buf);
 393
 394     return true;
 395 }
 396
 397 bool wxTIFFHandler::DoCanRead( wxInputStream& stream )
 398 {
 399     unsigned char hdr[2];
 400
 401     if ( !stream.Read(&hdr, WXSIZEOF(hdr)) )
 402         return false;
 403
 404     return (hdr[0] == 'I' && hdr[1] == 'I') ||
 405            (hdr[0] == 'M' && hdr[1] == 'M');
 406 }
 407
 408 #endif  // wxUSE_STREAMS
 409
 410 #endif  // wxUSE_LIBTIFF
 411