| 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 | if ( !stream.Read(&hdr, WXSIZEOF(hdr)) ) |
| 374 | return FALSE; |
| 375 | |
| 376 | return (hdr[0] == 'I' && hdr[1] == 'I') || |
| 377 | (hdr[0] == 'M' && hdr[1] == 'M'); |
| 378 | } |
| 379 | |
| 380 | |
| 381 | #endif |
| 382 | // wxUSE_LIBTIFF |
| 383 | |
| 384 | |