| 1 | /* $Id$ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1988-1997 Sam Leffler |
| 5 | * Copyright (c) 1991-1997 Silicon Graphics, Inc. |
| 6 | * |
| 7 | * Permission to use, copy, modify, distribute, and sell this software and |
| 8 | * its documentation for any purpose is hereby granted without fee, provided |
| 9 | * that (i) the above copyright notices and this permission notice appear in |
| 10 | * all copies of the software and related documentation, and (ii) the names of |
| 11 | * Sam Leffler and Silicon Graphics may not be used in any advertising or |
| 12 | * publicity relating to the software without the specific, prior written |
| 13 | * permission of Sam Leffler and Silicon Graphics. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
| 17 | * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | * |
| 19 | * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
| 20 | * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
| 21 | * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 22 | * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
| 23 | * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 24 | * OF THIS SOFTWARE. |
| 25 | */ |
| 26 | |
| 27 | /* |
| 28 | * TIFF Library. |
| 29 | * |
| 30 | * Directory Read Support Routines. |
| 31 | */ |
| 32 | #include "tiffiop.h" |
| 33 | |
| 34 | #define IGNORE 0 /* tag placeholder used below */ |
| 35 | |
| 36 | #ifdef HAVE_IEEEFP |
| 37 | # define TIFFCvtIEEEFloatToNative(tif, n, fp) |
| 38 | # define TIFFCvtIEEEDoubleToNative(tif, n, dp) |
| 39 | #else |
| 40 | extern void TIFFCvtIEEEFloatToNative(TIFF*, uint32, float*); |
| 41 | extern void TIFFCvtIEEEDoubleToNative(TIFF*, uint32, double*); |
| 42 | #endif |
| 43 | |
| 44 | static int EstimateStripByteCounts(TIFF*, TIFFDirEntry*, uint16); |
| 45 | static void MissingRequired(TIFF*, const char*); |
| 46 | static int CheckDirCount(TIFF*, TIFFDirEntry*, uint32); |
| 47 | static tsize_t TIFFFetchData(TIFF*, TIFFDirEntry*, char*); |
| 48 | static tsize_t TIFFFetchString(TIFF*, TIFFDirEntry*, char*); |
| 49 | static float TIFFFetchRational(TIFF*, TIFFDirEntry*); |
| 50 | static int TIFFFetchNormalTag(TIFF*, TIFFDirEntry*); |
| 51 | static int TIFFFetchPerSampleShorts(TIFF*, TIFFDirEntry*, uint16*); |
| 52 | static int TIFFFetchPerSampleLongs(TIFF*, TIFFDirEntry*, uint32*); |
| 53 | static int TIFFFetchPerSampleAnys(TIFF*, TIFFDirEntry*, double*); |
| 54 | static int TIFFFetchShortArray(TIFF*, TIFFDirEntry*, uint16*); |
| 55 | static int TIFFFetchStripThing(TIFF*, TIFFDirEntry*, long, uint32**); |
| 56 | static int TIFFFetchRefBlackWhite(TIFF*, TIFFDirEntry*); |
| 57 | static float TIFFFetchFloat(TIFF*, TIFFDirEntry*); |
| 58 | static int TIFFFetchFloatArray(TIFF*, TIFFDirEntry*, float*); |
| 59 | static int TIFFFetchDoubleArray(TIFF*, TIFFDirEntry*, double*); |
| 60 | static int TIFFFetchAnyArray(TIFF*, TIFFDirEntry*, double*); |
| 61 | static int TIFFFetchShortPair(TIFF*, TIFFDirEntry*); |
| 62 | static void ChopUpSingleUncompressedStrip(TIFF*); |
| 63 | |
| 64 | /* |
| 65 | * Read the next TIFF directory from a file |
| 66 | * and convert it to the internal format. |
| 67 | * We read directories sequentially. |
| 68 | */ |
| 69 | int |
| 70 | TIFFReadDirectory(TIFF* tif) |
| 71 | { |
| 72 | static const char module[] = "TIFFReadDirectory"; |
| 73 | |
| 74 | int n; |
| 75 | TIFFDirectory* td; |
| 76 | TIFFDirEntry *dp, *dir = NULL; |
| 77 | uint16 iv; |
| 78 | uint32 v; |
| 79 | const TIFFFieldInfo* fip; |
| 80 | size_t fix; |
| 81 | uint16 dircount; |
| 82 | toff_t nextdiroff; |
| 83 | int diroutoforderwarning = 0; |
| 84 | toff_t* new_dirlist; |
| 85 | |
| 86 | tif->tif_diroff = tif->tif_nextdiroff; |
| 87 | if (tif->tif_diroff == 0) /* no more directories */ |
| 88 | return (0); |
| 89 | |
| 90 | /* |
| 91 | * XXX: Trick to prevent IFD looping. The one can create TIFF file |
| 92 | * with looped directory pointers. We will maintain a list of already |
| 93 | * seen directories and check every IFD offset against this list. |
| 94 | */ |
| 95 | for (n = 0; n < tif->tif_dirnumber; n++) { |
| 96 | if (tif->tif_dirlist[n] == tif->tif_diroff) |
| 97 | return (0); |
| 98 | } |
| 99 | tif->tif_dirnumber++; |
| 100 | new_dirlist = (toff_t *)_TIFFrealloc(tif->tif_dirlist, |
| 101 | tif->tif_dirnumber * sizeof(toff_t)); |
| 102 | if (!new_dirlist) { |
| 103 | TIFFErrorExt(tif->tif_clientdata, module, |
| 104 | "%s: Failed to allocate space for IFD list", |
| 105 | tif->tif_name); |
| 106 | return (0); |
| 107 | } |
| 108 | tif->tif_dirlist = new_dirlist; |
| 109 | tif->tif_dirlist[tif->tif_dirnumber - 1] = tif->tif_diroff; |
| 110 | |
| 111 | /* |
| 112 | * Cleanup any previous compression state. |
| 113 | */ |
| 114 | (*tif->tif_cleanup)(tif); |
| 115 | tif->tif_curdir++; |
| 116 | nextdiroff = 0; |
| 117 | if (!isMapped(tif)) { |
| 118 | if (!SeekOK(tif, tif->tif_diroff)) { |
| 119 | TIFFErrorExt(tif->tif_clientdata, module, |
| 120 | "%s: Seek error accessing TIFF directory", |
| 121 | tif->tif_name); |
| 122 | return (0); |
| 123 | } |
| 124 | if (!ReadOK(tif, &dircount, sizeof (uint16))) { |
| 125 | TIFFErrorExt(tif->tif_clientdata, module, |
| 126 | "%s: Can not read TIFF directory count", |
| 127 | tif->tif_name); |
| 128 | return (0); |
| 129 | } |
| 130 | if (tif->tif_flags & TIFF_SWAB) |
| 131 | TIFFSwabShort(&dircount); |
| 132 | dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount, |
| 133 | sizeof (TIFFDirEntry), |
| 134 | "to read TIFF directory"); |
| 135 | if (dir == NULL) |
| 136 | return (0); |
| 137 | if (!ReadOK(tif, dir, dircount*sizeof (TIFFDirEntry))) { |
| 138 | TIFFErrorExt(tif->tif_clientdata, module, |
| 139 | "%.100s: Can not read TIFF directory", |
| 140 | tif->tif_name); |
| 141 | goto bad; |
| 142 | } |
| 143 | /* |
| 144 | * Read offset to next directory for sequential scans. |
| 145 | */ |
| 146 | (void) ReadOK(tif, &nextdiroff, sizeof (uint32)); |
| 147 | } else { |
| 148 | toff_t off = tif->tif_diroff; |
| 149 | |
| 150 | if (off + sizeof (uint16) > tif->tif_size) { |
| 151 | TIFFErrorExt(tif->tif_clientdata, module, |
| 152 | "%s: Can not read TIFF directory count", |
| 153 | tif->tif_name); |
| 154 | return (0); |
| 155 | } else |
| 156 | _TIFFmemcpy(&dircount, tif->tif_base + off, sizeof (uint16)); |
| 157 | off += sizeof (uint16); |
| 158 | if (tif->tif_flags & TIFF_SWAB) |
| 159 | TIFFSwabShort(&dircount); |
| 160 | dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount, |
| 161 | sizeof (TIFFDirEntry), |
| 162 | "to read TIFF directory"); |
| 163 | if (dir == NULL) |
| 164 | return (0); |
| 165 | if (off + dircount*sizeof (TIFFDirEntry) > tif->tif_size) { |
| 166 | TIFFErrorExt(tif->tif_clientdata, module, |
| 167 | "%s: Can not read TIFF directory", |
| 168 | tif->tif_name); |
| 169 | goto bad; |
| 170 | } else { |
| 171 | _TIFFmemcpy(dir, tif->tif_base + off, |
| 172 | dircount*sizeof (TIFFDirEntry)); |
| 173 | } |
| 174 | off += dircount* sizeof (TIFFDirEntry); |
| 175 | if (off + sizeof (uint32) <= tif->tif_size) |
| 176 | _TIFFmemcpy(&nextdiroff, tif->tif_base+off, sizeof (uint32)); |
| 177 | } |
| 178 | if (tif->tif_flags & TIFF_SWAB) |
| 179 | TIFFSwabLong(&nextdiroff); |
| 180 | tif->tif_nextdiroff = nextdiroff; |
| 181 | |
| 182 | tif->tif_flags &= ~TIFF_BEENWRITING; /* reset before new dir */ |
| 183 | /* |
| 184 | * Setup default value and then make a pass over |
| 185 | * the fields to check type and tag information, |
| 186 | * and to extract info required to size data |
| 187 | * structures. A second pass is made afterwards |
| 188 | * to read in everthing not taken in the first pass. |
| 189 | */ |
| 190 | td = &tif->tif_dir; |
| 191 | /* free any old stuff and reinit */ |
| 192 | TIFFFreeDirectory(tif); |
| 193 | TIFFDefaultDirectory(tif); |
| 194 | /* |
| 195 | * Electronic Arts writes gray-scale TIFF files |
| 196 | * without a PlanarConfiguration directory entry. |
| 197 | * Thus we setup a default value here, even though |
| 198 | * the TIFF spec says there is no default value. |
| 199 | */ |
| 200 | TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG); |
| 201 | |
| 202 | /* |
| 203 | * Sigh, we must make a separate pass through the |
| 204 | * directory for the following reason: |
| 205 | * |
| 206 | * We must process the Compression tag in the first pass |
| 207 | * in order to merge in codec-private tag definitions (otherwise |
| 208 | * we may get complaints about unknown tags). However, the |
| 209 | * Compression tag may be dependent on the SamplesPerPixel |
| 210 | * tag value because older TIFF specs permited Compression |
| 211 | * to be written as a SamplesPerPixel-count tag entry. |
| 212 | * Thus if we don't first figure out the correct SamplesPerPixel |
| 213 | * tag value then we may end up ignoring the Compression tag |
| 214 | * value because it has an incorrect count value (if the |
| 215 | * true value of SamplesPerPixel is not 1). |
| 216 | * |
| 217 | * It sure would have been nice if Aldus had really thought |
| 218 | * this stuff through carefully. |
| 219 | */ |
| 220 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 221 | if (tif->tif_flags & TIFF_SWAB) { |
| 222 | TIFFSwabArrayOfShort(&dp->tdir_tag, 2); |
| 223 | TIFFSwabArrayOfLong(&dp->tdir_count, 2); |
| 224 | } |
| 225 | if (dp->tdir_tag == TIFFTAG_SAMPLESPERPIXEL) { |
| 226 | if (!TIFFFetchNormalTag(tif, dp)) |
| 227 | goto bad; |
| 228 | dp->tdir_tag = IGNORE; |
| 229 | } |
| 230 | } |
| 231 | /* |
| 232 | * First real pass over the directory. |
| 233 | */ |
| 234 | fix = 0; |
| 235 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 236 | |
| 237 | if (fix >= tif->tif_nfields || dp->tdir_tag == IGNORE) |
| 238 | continue; |
| 239 | |
| 240 | /* |
| 241 | * Silicon Beach (at least) writes unordered |
| 242 | * directory tags (violating the spec). Handle |
| 243 | * it here, but be obnoxious (maybe they'll fix it?). |
| 244 | */ |
| 245 | if (dp->tdir_tag < tif->tif_fieldinfo[fix]->field_tag) { |
| 246 | if (!diroutoforderwarning) { |
| 247 | TIFFWarningExt(tif->tif_clientdata, module, |
| 248 | "%s: invalid TIFF directory; tags are not sorted in ascending order", |
| 249 | tif->tif_name); |
| 250 | diroutoforderwarning = 1; |
| 251 | } |
| 252 | fix = 0; /* O(n^2) */ |
| 253 | } |
| 254 | while (fix < tif->tif_nfields && |
| 255 | tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) |
| 256 | fix++; |
| 257 | if (fix >= tif->tif_nfields || |
| 258 | tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) { |
| 259 | |
| 260 | TIFFWarningExt(tif->tif_clientdata, |
| 261 | module, |
| 262 | "%s: unknown field with tag %d (0x%x) encountered", |
| 263 | tif->tif_name, |
| 264 | dp->tdir_tag, |
| 265 | dp->tdir_tag, |
| 266 | dp->tdir_type); |
| 267 | |
| 268 | TIFFMergeFieldInfo(tif, |
| 269 | _TIFFCreateAnonFieldInfo(tif, |
| 270 | dp->tdir_tag, |
| 271 | (TIFFDataType) dp->tdir_type), |
| 272 | 1 ); |
| 273 | fix = 0; |
| 274 | while (fix < tif->tif_nfields && |
| 275 | tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) |
| 276 | fix++; |
| 277 | } |
| 278 | /* |
| 279 | * Null out old tags that we ignore. |
| 280 | */ |
| 281 | if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) { |
| 282 | ignore: |
| 283 | dp->tdir_tag = IGNORE; |
| 284 | continue; |
| 285 | } |
| 286 | /* |
| 287 | * Check data type. |
| 288 | */ |
| 289 | fip = tif->tif_fieldinfo[fix]; |
| 290 | while (dp->tdir_type != (unsigned short) fip->field_type |
| 291 | && fix < tif->tif_nfields) { |
| 292 | if (fip->field_type == TIFF_ANY) /* wildcard */ |
| 293 | break; |
| 294 | fip = tif->tif_fieldinfo[++fix]; |
| 295 | if (fix >= tif->tif_nfields || |
| 296 | fip->field_tag != dp->tdir_tag) { |
| 297 | TIFFWarningExt(tif->tif_clientdata, module, |
| 298 | "%s: wrong data type %d for \"%s\"; tag ignored", |
| 299 | tif->tif_name, dp->tdir_type, |
| 300 | tif->tif_fieldinfo[fix-1]->field_name); |
| 301 | goto ignore; |
| 302 | } |
| 303 | } |
| 304 | /* |
| 305 | * Check count if known in advance. |
| 306 | */ |
| 307 | if (fip->field_readcount != TIFF_VARIABLE |
| 308 | && fip->field_readcount != TIFF_VARIABLE2) { |
| 309 | uint32 expected = (fip->field_readcount == TIFF_SPP) ? |
| 310 | (uint32) td->td_samplesperpixel : |
| 311 | (uint32) fip->field_readcount; |
| 312 | if (!CheckDirCount(tif, dp, expected)) |
| 313 | goto ignore; |
| 314 | } |
| 315 | |
| 316 | switch (dp->tdir_tag) { |
| 317 | case TIFFTAG_COMPRESSION: |
| 318 | /* |
| 319 | * The 5.0 spec says the Compression tag has |
| 320 | * one value, while earlier specs say it has |
| 321 | * one value per sample. Because of this, we |
| 322 | * accept the tag if one value is supplied. |
| 323 | */ |
| 324 | if (dp->tdir_count == 1) { |
| 325 | v = TIFFExtractData(tif, |
| 326 | dp->tdir_type, dp->tdir_offset); |
| 327 | if (!TIFFSetField(tif, dp->tdir_tag, (uint16)v)) |
| 328 | goto bad; |
| 329 | break; |
| 330 | /* XXX: workaround for broken TIFFs */ |
| 331 | } else if (dp->tdir_type == TIFF_LONG) { |
| 332 | if (!TIFFFetchPerSampleLongs(tif, dp, &v) || |
| 333 | !TIFFSetField(tif, dp->tdir_tag, (uint16)v)) |
| 334 | goto bad; |
| 335 | } else { |
| 336 | if (!TIFFFetchPerSampleShorts(tif, dp, &iv) |
| 337 | || !TIFFSetField(tif, dp->tdir_tag, iv)) |
| 338 | goto bad; |
| 339 | } |
| 340 | dp->tdir_tag = IGNORE; |
| 341 | break; |
| 342 | case TIFFTAG_STRIPOFFSETS: |
| 343 | case TIFFTAG_STRIPBYTECOUNTS: |
| 344 | case TIFFTAG_TILEOFFSETS: |
| 345 | case TIFFTAG_TILEBYTECOUNTS: |
| 346 | TIFFSetFieldBit(tif, fip->field_bit); |
| 347 | break; |
| 348 | case TIFFTAG_IMAGEWIDTH: |
| 349 | case TIFFTAG_IMAGELENGTH: |
| 350 | case TIFFTAG_IMAGEDEPTH: |
| 351 | case TIFFTAG_TILELENGTH: |
| 352 | case TIFFTAG_TILEWIDTH: |
| 353 | case TIFFTAG_TILEDEPTH: |
| 354 | case TIFFTAG_PLANARCONFIG: |
| 355 | case TIFFTAG_ROWSPERSTRIP: |
| 356 | case TIFFTAG_EXTRASAMPLES: |
| 357 | if (!TIFFFetchNormalTag(tif, dp)) |
| 358 | goto bad; |
| 359 | dp->tdir_tag = IGNORE; |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Allocate directory structure and setup defaults. |
| 366 | */ |
| 367 | if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) { |
| 368 | MissingRequired(tif, "ImageLength"); |
| 369 | goto bad; |
| 370 | } |
| 371 | /* |
| 372 | * Setup appropriate structures (by strip or by tile) |
| 373 | */ |
| 374 | if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) { |
| 375 | td->td_nstrips = TIFFNumberOfStrips(tif); |
| 376 | td->td_tilewidth = td->td_imagewidth; |
| 377 | td->td_tilelength = td->td_rowsperstrip; |
| 378 | td->td_tiledepth = td->td_imagedepth; |
| 379 | tif->tif_flags &= ~TIFF_ISTILED; |
| 380 | } else { |
| 381 | td->td_nstrips = TIFFNumberOfTiles(tif); |
| 382 | tif->tif_flags |= TIFF_ISTILED; |
| 383 | } |
| 384 | if (!td->td_nstrips) { |
| 385 | TIFFErrorExt(tif->tif_clientdata, module, |
| 386 | "%s: cannot handle zero number of %s", |
| 387 | tif->tif_name, isTiled(tif) ? "tiles" : "strips"); |
| 388 | goto bad; |
| 389 | } |
| 390 | td->td_stripsperimage = td->td_nstrips; |
| 391 | if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
| 392 | td->td_stripsperimage /= td->td_samplesperpixel; |
| 393 | if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) { |
| 394 | MissingRequired(tif, |
| 395 | isTiled(tif) ? "TileOffsets" : "StripOffsets"); |
| 396 | goto bad; |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Second pass: extract other information. |
| 401 | */ |
| 402 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 403 | if (dp->tdir_tag == IGNORE) |
| 404 | continue; |
| 405 | switch (dp->tdir_tag) { |
| 406 | case TIFFTAG_MINSAMPLEVALUE: |
| 407 | case TIFFTAG_MAXSAMPLEVALUE: |
| 408 | case TIFFTAG_BITSPERSAMPLE: |
| 409 | case TIFFTAG_DATATYPE: |
| 410 | case TIFFTAG_SAMPLEFORMAT: |
| 411 | /* |
| 412 | * The 5.0 spec says the Compression tag has |
| 413 | * one value, while earlier specs say it has |
| 414 | * one value per sample. Because of this, we |
| 415 | * accept the tag if one value is supplied. |
| 416 | * |
| 417 | * The MinSampleValue, MaxSampleValue, BitsPerSample |
| 418 | * DataType and SampleFormat tags are supposed to be |
| 419 | * written as one value/sample, but some vendors |
| 420 | * incorrectly write one value only -- so we accept |
| 421 | * that as well (yech). Other vendors write correct |
| 422 | * value for NumberOfSamples, but incorrect one for |
| 423 | * BitsPerSample and friends, and we will read this |
| 424 | * too. |
| 425 | */ |
| 426 | if (dp->tdir_count == 1) { |
| 427 | v = TIFFExtractData(tif, |
| 428 | dp->tdir_type, dp->tdir_offset); |
| 429 | if (!TIFFSetField(tif, dp->tdir_tag, (uint16)v)) |
| 430 | goto bad; |
| 431 | /* XXX: workaround for broken TIFFs */ |
| 432 | } else if (dp->tdir_tag == TIFFTAG_BITSPERSAMPLE |
| 433 | && dp->tdir_type == TIFF_LONG) { |
| 434 | if (!TIFFFetchPerSampleLongs(tif, dp, &v) || |
| 435 | !TIFFSetField(tif, dp->tdir_tag, (uint16)v)) |
| 436 | goto bad; |
| 437 | } else { |
| 438 | if (!TIFFFetchPerSampleShorts(tif, dp, &iv) || |
| 439 | !TIFFSetField(tif, dp->tdir_tag, iv)) |
| 440 | goto bad; |
| 441 | } |
| 442 | break; |
| 443 | case TIFFTAG_SMINSAMPLEVALUE: |
| 444 | case TIFFTAG_SMAXSAMPLEVALUE: |
| 445 | { |
| 446 | double dv = 0.0; |
| 447 | if (!TIFFFetchPerSampleAnys(tif, dp, &dv) || |
| 448 | !TIFFSetField(tif, dp->tdir_tag, dv)) |
| 449 | goto bad; |
| 450 | } |
| 451 | break; |
| 452 | case TIFFTAG_STRIPOFFSETS: |
| 453 | case TIFFTAG_TILEOFFSETS: |
| 454 | if (!TIFFFetchStripThing(tif, dp, |
| 455 | td->td_nstrips, &td->td_stripoffset)) |
| 456 | goto bad; |
| 457 | break; |
| 458 | case TIFFTAG_STRIPBYTECOUNTS: |
| 459 | case TIFFTAG_TILEBYTECOUNTS: |
| 460 | if (!TIFFFetchStripThing(tif, dp, |
| 461 | td->td_nstrips, &td->td_stripbytecount)) |
| 462 | goto bad; |
| 463 | break; |
| 464 | case TIFFTAG_COLORMAP: |
| 465 | case TIFFTAG_TRANSFERFUNCTION: |
| 466 | { |
| 467 | char* cp; |
| 468 | /* |
| 469 | * TransferFunction can have either 1x or 3x |
| 470 | * data values; Colormap can have only 3x |
| 471 | * items. |
| 472 | */ |
| 473 | v = 1L<<td->td_bitspersample; |
| 474 | if (dp->tdir_tag == TIFFTAG_COLORMAP || |
| 475 | dp->tdir_count != v) { |
| 476 | if (!CheckDirCount(tif, dp, 3 * v)) |
| 477 | break; |
| 478 | } |
| 479 | v *= sizeof(uint16); |
| 480 | cp = (char *)_TIFFCheckMalloc(tif, |
| 481 | dp->tdir_count, |
| 482 | sizeof (uint16), |
| 483 | "to read \"TransferFunction\" tag"); |
| 484 | if (cp != NULL) { |
| 485 | if (TIFFFetchData(tif, dp, cp)) { |
| 486 | /* |
| 487 | * This deals with there being |
| 488 | * only one array to apply to |
| 489 | * all samples. |
| 490 | */ |
| 491 | uint32 c = 1L << td->td_bitspersample; |
| 492 | if (dp->tdir_count == c) |
| 493 | v = 0L; |
| 494 | TIFFSetField(tif, dp->tdir_tag, |
| 495 | cp, cp+v, cp+2*v); |
| 496 | } |
| 497 | _TIFFfree(cp); |
| 498 | } |
| 499 | break; |
| 500 | } |
| 501 | case TIFFTAG_PAGENUMBER: |
| 502 | case TIFFTAG_HALFTONEHINTS: |
| 503 | case TIFFTAG_YCBCRSUBSAMPLING: |
| 504 | case TIFFTAG_DOTRANGE: |
| 505 | (void) TIFFFetchShortPair(tif, dp); |
| 506 | break; |
| 507 | case TIFFTAG_REFERENCEBLACKWHITE: |
| 508 | (void) TIFFFetchRefBlackWhite(tif, dp); |
| 509 | break; |
| 510 | /* BEGIN REV 4.0 COMPATIBILITY */ |
| 511 | case TIFFTAG_OSUBFILETYPE: |
| 512 | v = 0L; |
| 513 | switch (TIFFExtractData(tif, dp->tdir_type, |
| 514 | dp->tdir_offset)) { |
| 515 | case OFILETYPE_REDUCEDIMAGE: |
| 516 | v = FILETYPE_REDUCEDIMAGE; |
| 517 | break; |
| 518 | case OFILETYPE_PAGE: |
| 519 | v = FILETYPE_PAGE; |
| 520 | break; |
| 521 | } |
| 522 | if (v) |
| 523 | TIFFSetField(tif, TIFFTAG_SUBFILETYPE, v); |
| 524 | break; |
| 525 | /* END REV 4.0 COMPATIBILITY */ |
| 526 | default: |
| 527 | (void) TIFFFetchNormalTag(tif, dp); |
| 528 | break; |
| 529 | } |
| 530 | } |
| 531 | /* |
| 532 | * Verify Palette image has a Colormap. |
| 533 | */ |
| 534 | if (td->td_photometric == PHOTOMETRIC_PALETTE && |
| 535 | !TIFFFieldSet(tif, FIELD_COLORMAP)) { |
| 536 | MissingRequired(tif, "Colormap"); |
| 537 | goto bad; |
| 538 | } |
| 539 | /* |
| 540 | * Attempt to deal with a missing StripByteCounts tag. |
| 541 | */ |
| 542 | if (!TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) { |
| 543 | /* |
| 544 | * Some manufacturers violate the spec by not giving |
| 545 | * the size of the strips. In this case, assume there |
| 546 | * is one uncompressed strip of data. |
| 547 | */ |
| 548 | if ((td->td_planarconfig == PLANARCONFIG_CONTIG && |
| 549 | td->td_nstrips > 1) || |
| 550 | (td->td_planarconfig == PLANARCONFIG_SEPARATE && |
| 551 | td->td_nstrips != td->td_samplesperpixel)) { |
| 552 | MissingRequired(tif, "StripByteCounts"); |
| 553 | goto bad; |
| 554 | } |
| 555 | TIFFWarningExt(tif->tif_clientdata, module, |
| 556 | "%s: TIFF directory is missing required " |
| 557 | "\"%s\" field, calculating from imagelength", |
| 558 | tif->tif_name, |
| 559 | _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); |
| 560 | if (EstimateStripByteCounts(tif, dir, dircount) < 0) |
| 561 | goto bad; |
| 562 | /* |
| 563 | * Assume we have wrong StripByteCount value (in case of single strip) in |
| 564 | * following cases: |
| 565 | * - it is equal to zero along with StripOffset; |
| 566 | * - it is larger than file itself (in case of uncompressed image); |
| 567 | * - it is smaller than the size of the bytes per row multiplied on the |
| 568 | * number of rows. The last case should not be checked in the case of |
| 569 | * writing new image, because we may do not know the exact strip size |
| 570 | * until the whole image will be written and directory dumped out. |
| 571 | */ |
| 572 | #define BYTECOUNTLOOKSBAD \ |
| 573 | ( (td->td_stripbytecount[0] == 0 && td->td_stripoffset[0] != 0) || \ |
| 574 | (td->td_compression == COMPRESSION_NONE && \ |
| 575 | td->td_stripbytecount[0] > TIFFGetFileSize(tif) - td->td_stripoffset[0]) || \ |
| 576 | (tif->tif_mode == O_RDONLY && \ |
| 577 | td->td_compression == COMPRESSION_NONE && \ |
| 578 | td->td_stripbytecount[0] < TIFFScanlineSize(tif) * td->td_imagelength) ) |
| 579 | |
| 580 | } else if (td->td_nstrips == 1 |
| 581 | && td->td_stripoffset[0] != 0 |
| 582 | && BYTECOUNTLOOKSBAD) { |
| 583 | /* |
| 584 | * XXX: Plexus (and others) sometimes give a value of zero for |
| 585 | * a tag when they don't know what the correct value is! Try |
| 586 | * and handle the simple case of estimating the size of a one |
| 587 | * strip image. |
| 588 | */ |
| 589 | TIFFWarningExt(tif->tif_clientdata, module, |
| 590 | "%s: Bogus \"%s\" field, ignoring and calculating from imagelength", |
| 591 | tif->tif_name, |
| 592 | _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); |
| 593 | if(EstimateStripByteCounts(tif, dir, dircount) < 0) |
| 594 | goto bad; |
| 595 | } else if (td->td_planarconfig == PLANARCONFIG_CONTIG |
| 596 | && td->td_nstrips > 2 |
| 597 | && td->td_compression == COMPRESSION_NONE |
| 598 | && td->td_stripbytecount[0] != td->td_stripbytecount[1]) { |
| 599 | /* |
| 600 | * XXX: Some vendors fill StripByteCount array with absolutely |
| 601 | * wrong values (it can be equal to StripOffset array, for |
| 602 | * example). Catch this case here. |
| 603 | */ |
| 604 | TIFFWarningExt(tif->tif_clientdata, module, |
| 605 | "%s: Wrong \"%s\" field, ignoring and calculating from imagelength", |
| 606 | tif->tif_name, |
| 607 | _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); |
| 608 | if (EstimateStripByteCounts(tif, dir, dircount) < 0) |
| 609 | goto bad; |
| 610 | } |
| 611 | if (dir) { |
| 612 | _TIFFfree((char *)dir); |
| 613 | dir = NULL; |
| 614 | } |
| 615 | if (!TIFFFieldSet(tif, FIELD_MAXSAMPLEVALUE)) |
| 616 | td->td_maxsamplevalue = (uint16)((1L<<td->td_bitspersample)-1); |
| 617 | /* |
| 618 | * Setup default compression scheme. |
| 619 | */ |
| 620 | |
| 621 | /* |
| 622 | * XXX: We can optimize checking for the strip bounds using the sorted |
| 623 | * bytecounts array. See also comments for TIFFAppendToStrip() |
| 624 | * function in tif_write.c. |
| 625 | */ |
| 626 | if (td->td_nstrips > 1) { |
| 627 | tstrip_t strip; |
| 628 | |
| 629 | td->td_stripbytecountsorted = 1; |
| 630 | for (strip = 1; strip < td->td_nstrips; strip++) { |
| 631 | if (td->td_stripoffset[strip - 1] > |
| 632 | td->td_stripoffset[strip]) { |
| 633 | td->td_stripbytecountsorted = 0; |
| 634 | break; |
| 635 | } |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | if (!TIFFFieldSet(tif, FIELD_COMPRESSION)) |
| 640 | TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE); |
| 641 | /* |
| 642 | * Some manufacturers make life difficult by writing |
| 643 | * large amounts of uncompressed data as a single strip. |
| 644 | * This is contrary to the recommendations of the spec. |
| 645 | * The following makes an attempt at breaking such images |
| 646 | * into strips closer to the recommended 8k bytes. A |
| 647 | * side effect, however, is that the RowsPerStrip tag |
| 648 | * value may be changed. |
| 649 | */ |
| 650 | if (td->td_nstrips == 1 && td->td_compression == COMPRESSION_NONE && |
| 651 | (tif->tif_flags & (TIFF_STRIPCHOP|TIFF_ISTILED)) == TIFF_STRIPCHOP) |
| 652 | ChopUpSingleUncompressedStrip(tif); |
| 653 | |
| 654 | /* |
| 655 | * Reinitialize i/o since we are starting on a new directory. |
| 656 | */ |
| 657 | tif->tif_row = (uint32) -1; |
| 658 | tif->tif_curstrip = (tstrip_t) -1; |
| 659 | tif->tif_col = (uint32) -1; |
| 660 | tif->tif_curtile = (ttile_t) -1; |
| 661 | tif->tif_tilesize = (tsize_t) -1; |
| 662 | |
| 663 | tif->tif_scanlinesize = TIFFScanlineSize(tif); |
| 664 | if (!tif->tif_scanlinesize) { |
| 665 | TIFFErrorExt(tif->tif_clientdata, module, "%s: cannot handle zero scanline size", |
| 666 | tif->tif_name); |
| 667 | return (0); |
| 668 | } |
| 669 | |
| 670 | if (isTiled(tif)) { |
| 671 | tif->tif_tilesize = TIFFTileSize(tif); |
| 672 | if (!tif->tif_tilesize) { |
| 673 | TIFFErrorExt(tif->tif_clientdata, module, "%s: cannot handle zero tile size", |
| 674 | tif->tif_name); |
| 675 | return (0); |
| 676 | } |
| 677 | } else { |
| 678 | if (!TIFFStripSize(tif)) { |
| 679 | TIFFErrorExt(tif->tif_clientdata, module, "%s: cannot handle zero strip size", |
| 680 | tif->tif_name); |
| 681 | return (0); |
| 682 | } |
| 683 | } |
| 684 | return (1); |
| 685 | bad: |
| 686 | if (dir) |
| 687 | _TIFFfree(dir); |
| 688 | return (0); |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * Read custom directory from the arbitarry offset. |
| 693 | * The code is very similar to TIFFReadDirectory(). |
| 694 | */ |
| 695 | int |
| 696 | TIFFReadCustomDirectory(TIFF* tif, toff_t diroff, |
| 697 | const TIFFFieldInfo info[], size_t n) |
| 698 | { |
| 699 | static const char module[] = "TIFFReadCustomDirectory"; |
| 700 | |
| 701 | TIFFDirectory* td = &tif->tif_dir; |
| 702 | TIFFDirEntry *dp, *dir = NULL; |
| 703 | const TIFFFieldInfo* fip; |
| 704 | size_t fix; |
| 705 | uint16 i, dircount; |
| 706 | |
| 707 | _TIFFSetupFieldInfo(tif, info, n); |
| 708 | |
| 709 | tif->tif_diroff = diroff; |
| 710 | |
| 711 | if (!isMapped(tif)) { |
| 712 | if (!SeekOK(tif, diroff)) { |
| 713 | TIFFErrorExt(tif->tif_clientdata, module, |
| 714 | "%s: Seek error accessing TIFF directory", |
| 715 | tif->tif_name); |
| 716 | return (0); |
| 717 | } |
| 718 | if (!ReadOK(tif, &dircount, sizeof (uint16))) { |
| 719 | TIFFErrorExt(tif->tif_clientdata, module, |
| 720 | "%s: Can not read TIFF directory count", |
| 721 | tif->tif_name); |
| 722 | return (0); |
| 723 | } |
| 724 | if (tif->tif_flags & TIFF_SWAB) |
| 725 | TIFFSwabShort(&dircount); |
| 726 | dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount, |
| 727 | sizeof (TIFFDirEntry), |
| 728 | "to read TIFF custom directory"); |
| 729 | if (dir == NULL) |
| 730 | return (0); |
| 731 | if (!ReadOK(tif, dir, dircount * sizeof (TIFFDirEntry))) { |
| 732 | TIFFErrorExt(tif->tif_clientdata, module, |
| 733 | "%.100s: Can not read TIFF directory", |
| 734 | tif->tif_name); |
| 735 | goto bad; |
| 736 | } |
| 737 | } else { |
| 738 | toff_t off = diroff; |
| 739 | |
| 740 | if (off + sizeof (uint16) > tif->tif_size) { |
| 741 | TIFFErrorExt(tif->tif_clientdata, module, |
| 742 | "%s: Can not read TIFF directory count", |
| 743 | tif->tif_name); |
| 744 | return (0); |
| 745 | } else |
| 746 | _TIFFmemcpy(&dircount, tif->tif_base + off, sizeof (uint16)); |
| 747 | off += sizeof (uint16); |
| 748 | if (tif->tif_flags & TIFF_SWAB) |
| 749 | TIFFSwabShort(&dircount); |
| 750 | dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount, |
| 751 | sizeof (TIFFDirEntry), |
| 752 | "to read TIFF custom directory"); |
| 753 | if (dir == NULL) |
| 754 | return (0); |
| 755 | if (off + dircount * sizeof (TIFFDirEntry) > tif->tif_size) { |
| 756 | TIFFErrorExt(tif->tif_clientdata, module, |
| 757 | "%s: Can not read TIFF directory", |
| 758 | tif->tif_name); |
| 759 | goto bad; |
| 760 | } else { |
| 761 | _TIFFmemcpy(dir, tif->tif_base + off, |
| 762 | dircount * sizeof (TIFFDirEntry)); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | TIFFFreeDirectory(tif); |
| 767 | |
| 768 | fix = 0; |
| 769 | for (dp = dir, i = dircount; i > 0; i--, dp++) { |
| 770 | if (tif->tif_flags & TIFF_SWAB) { |
| 771 | TIFFSwabArrayOfShort(&dp->tdir_tag, 2); |
| 772 | TIFFSwabArrayOfLong(&dp->tdir_count, 2); |
| 773 | } |
| 774 | |
| 775 | if (fix >= tif->tif_nfields || dp->tdir_tag == IGNORE) |
| 776 | continue; |
| 777 | |
| 778 | while (fix < tif->tif_nfields && |
| 779 | tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) |
| 780 | fix++; |
| 781 | |
| 782 | if (fix >= tif->tif_nfields || |
| 783 | tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) { |
| 784 | |
| 785 | TIFFWarningExt(tif->tif_clientdata, module, |
| 786 | "%s: unknown field with tag %d (0x%x) encountered", |
| 787 | tif->tif_name, dp->tdir_tag, dp->tdir_tag, |
| 788 | dp->tdir_type); |
| 789 | |
| 790 | TIFFMergeFieldInfo(tif, |
| 791 | _TIFFCreateAnonFieldInfo(tif, |
| 792 | dp->tdir_tag, |
| 793 | (TIFFDataType)dp->tdir_type), |
| 794 | 1); |
| 795 | |
| 796 | fix = 0; |
| 797 | while (fix < tif->tif_nfields && |
| 798 | tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) |
| 799 | fix++; |
| 800 | } |
| 801 | /* |
| 802 | * Null out old tags that we ignore. |
| 803 | */ |
| 804 | if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) { |
| 805 | ignore: |
| 806 | dp->tdir_tag = IGNORE; |
| 807 | continue; |
| 808 | } |
| 809 | /* |
| 810 | * Check data type. |
| 811 | */ |
| 812 | fip = tif->tif_fieldinfo[fix]; |
| 813 | while (dp->tdir_type != (unsigned short) fip->field_type |
| 814 | && fix < tif->tif_nfields) { |
| 815 | if (fip->field_type == TIFF_ANY) /* wildcard */ |
| 816 | break; |
| 817 | fip = tif->tif_fieldinfo[++fix]; |
| 818 | if (fix >= tif->tif_nfields || |
| 819 | fip->field_tag != dp->tdir_tag) { |
| 820 | TIFFWarningExt(tif->tif_clientdata, module, |
| 821 | "%s: wrong data type %d for \"%s\"; tag ignored", |
| 822 | tif->tif_name, dp->tdir_type, |
| 823 | tif->tif_fieldinfo[fix-1]->field_name); |
| 824 | goto ignore; |
| 825 | } |
| 826 | } |
| 827 | /* |
| 828 | * Check count if known in advance. |
| 829 | */ |
| 830 | if (fip->field_readcount != TIFF_VARIABLE |
| 831 | && fip->field_readcount != TIFF_VARIABLE2) { |
| 832 | uint32 expected = (fip->field_readcount == TIFF_SPP) ? |
| 833 | (uint32) td->td_samplesperpixel : |
| 834 | (uint32) fip->field_readcount; |
| 835 | if (!CheckDirCount(tif, dp, expected)) |
| 836 | goto ignore; |
| 837 | } |
| 838 | |
| 839 | (void) TIFFFetchNormalTag(tif, dp); |
| 840 | } |
| 841 | |
| 842 | if (dir) |
| 843 | _TIFFfree(dir); |
| 844 | return 1; |
| 845 | |
| 846 | bad: |
| 847 | if (dir) |
| 848 | _TIFFfree(dir); |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * EXIF is important special case of custom IFD, so we have a special |
| 854 | * function to read it. |
| 855 | */ |
| 856 | int |
| 857 | TIFFReadEXIFDirectory(TIFF* tif, toff_t diroff) |
| 858 | { |
| 859 | size_t exifFieldInfoCount; |
| 860 | const TIFFFieldInfo *exifFieldInfo = |
| 861 | _TIFFGetExifFieldInfo(&exifFieldInfoCount); |
| 862 | return TIFFReadCustomDirectory(tif, diroff, exifFieldInfo, |
| 863 | exifFieldInfoCount); |
| 864 | } |
| 865 | |
| 866 | static int |
| 867 | EstimateStripByteCounts(TIFF* tif, TIFFDirEntry* dir, uint16 dircount) |
| 868 | { |
| 869 | static const char module[] = "EstimateStripByteCounts"; |
| 870 | |
| 871 | register TIFFDirEntry *dp; |
| 872 | register TIFFDirectory *td = &tif->tif_dir; |
| 873 | uint16 i; |
| 874 | |
| 875 | if (td->td_stripbytecount) |
| 876 | _TIFFfree(td->td_stripbytecount); |
| 877 | td->td_stripbytecount = (uint32*) |
| 878 | _TIFFCheckMalloc(tif, td->td_nstrips, sizeof (uint32), |
| 879 | "for \"StripByteCounts\" array"); |
| 880 | if (td->td_compression != COMPRESSION_NONE) { |
| 881 | uint32 space = (uint32)(sizeof (TIFFHeader) |
| 882 | + sizeof (uint16) |
| 883 | + (dircount * sizeof (TIFFDirEntry)) |
| 884 | + sizeof (uint32)); |
| 885 | toff_t filesize = TIFFGetFileSize(tif); |
| 886 | uint16 n; |
| 887 | |
| 888 | /* calculate amount of space used by indirect values */ |
| 889 | for (dp = dir, n = dircount; n > 0; n--, dp++) |
| 890 | { |
| 891 | uint32 cc = TIFFDataWidth((TIFFDataType) dp->tdir_type); |
| 892 | if (cc == 0) { |
| 893 | TIFFErrorExt(tif->tif_clientdata, module, |
| 894 | "%s: Cannot determine size of unknown tag type %d", |
| 895 | tif->tif_name, dp->tdir_type); |
| 896 | return -1; |
| 897 | } |
| 898 | cc = cc * dp->tdir_count; |
| 899 | if (cc > sizeof (uint32)) |
| 900 | space += cc; |
| 901 | } |
| 902 | space = filesize - space; |
| 903 | if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
| 904 | space /= td->td_samplesperpixel; |
| 905 | for (i = 0; i < td->td_nstrips; i++) |
| 906 | td->td_stripbytecount[i] = space; |
| 907 | /* |
| 908 | * This gross hack handles the case were the offset to |
| 909 | * the last strip is past the place where we think the strip |
| 910 | * should begin. Since a strip of data must be contiguous, |
| 911 | * it's safe to assume that we've overestimated the amount |
| 912 | * of data in the strip and trim this number back accordingly. |
| 913 | */ |
| 914 | i--; |
| 915 | if (((toff_t)(td->td_stripoffset[i]+td->td_stripbytecount[i])) |
| 916 | > filesize) |
| 917 | td->td_stripbytecount[i] = |
| 918 | filesize - td->td_stripoffset[i]; |
| 919 | } else { |
| 920 | uint32 rowbytes = TIFFScanlineSize(tif); |
| 921 | uint32 rowsperstrip = td->td_imagelength/td->td_stripsperimage; |
| 922 | for (i = 0; i < td->td_nstrips; i++) |
| 923 | td->td_stripbytecount[i] = rowbytes*rowsperstrip; |
| 924 | } |
| 925 | TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); |
| 926 | if (!TIFFFieldSet(tif, FIELD_ROWSPERSTRIP)) |
| 927 | td->td_rowsperstrip = td->td_imagelength; |
| 928 | return 1; |
| 929 | } |
| 930 | |
| 931 | static void |
| 932 | MissingRequired(TIFF* tif, const char* tagname) |
| 933 | { |
| 934 | static const char module[] = "MissingRequired"; |
| 935 | |
| 936 | TIFFErrorExt(tif->tif_clientdata, module, |
| 937 | "%s: TIFF directory is missing required \"%s\" field", |
| 938 | tif->tif_name, tagname); |
| 939 | } |
| 940 | |
| 941 | /* |
| 942 | * Check the count field of a directory |
| 943 | * entry against a known value. The caller |
| 944 | * is expected to skip/ignore the tag if |
| 945 | * there is a mismatch. |
| 946 | */ |
| 947 | static int |
| 948 | CheckDirCount(TIFF* tif, TIFFDirEntry* dir, uint32 count) |
| 949 | { |
| 950 | if (count > dir->tdir_count) { |
| 951 | TIFFWarningExt(tif->tif_clientdata, tif->tif_name, |
| 952 | "incorrect count for field \"%s\" (%lu, expecting %lu); tag ignored", |
| 953 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, |
| 954 | dir->tdir_count, count); |
| 955 | return (0); |
| 956 | } else if (count < dir->tdir_count) { |
| 957 | TIFFWarningExt(tif->tif_clientdata, tif->tif_name, |
| 958 | "incorrect count for field \"%s\" (%lu, expecting %lu); tag trimmed", |
| 959 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, |
| 960 | dir->tdir_count, count); |
| 961 | return (1); |
| 962 | } |
| 963 | return (1); |
| 964 | } |
| 965 | |
| 966 | /* |
| 967 | * Fetch a contiguous directory item. |
| 968 | */ |
| 969 | static tsize_t |
| 970 | TIFFFetchData(TIFF* tif, TIFFDirEntry* dir, char* cp) |
| 971 | { |
| 972 | int w = TIFFDataWidth((TIFFDataType) dir->tdir_type); |
| 973 | tsize_t cc = dir->tdir_count * w; |
| 974 | |
| 975 | /* Check for overflow. */ |
| 976 | if (!dir->tdir_count || !w || cc / w != (tsize_t)dir->tdir_count) |
| 977 | goto bad; |
| 978 | |
| 979 | if (!isMapped(tif)) { |
| 980 | if (!SeekOK(tif, dir->tdir_offset)) |
| 981 | goto bad; |
| 982 | if (!ReadOK(tif, cp, cc)) |
| 983 | goto bad; |
| 984 | } else { |
| 985 | /* Check for overflow. */ |
| 986 | if ((tsize_t)dir->tdir_offset + cc < (tsize_t)dir->tdir_offset |
| 987 | || (tsize_t)dir->tdir_offset + cc < cc |
| 988 | || (tsize_t)dir->tdir_offset + cc > (tsize_t)tif->tif_size) |
| 989 | goto bad; |
| 990 | _TIFFmemcpy(cp, tif->tif_base + dir->tdir_offset, cc); |
| 991 | } |
| 992 | if (tif->tif_flags & TIFF_SWAB) { |
| 993 | switch (dir->tdir_type) { |
| 994 | case TIFF_SHORT: |
| 995 | case TIFF_SSHORT: |
| 996 | TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count); |
| 997 | break; |
| 998 | case TIFF_LONG: |
| 999 | case TIFF_SLONG: |
| 1000 | case TIFF_FLOAT: |
| 1001 | TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count); |
| 1002 | break; |
| 1003 | case TIFF_RATIONAL: |
| 1004 | case TIFF_SRATIONAL: |
| 1005 | TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count); |
| 1006 | break; |
| 1007 | case TIFF_DOUBLE: |
| 1008 | TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count); |
| 1009 | break; |
| 1010 | } |
| 1011 | } |
| 1012 | return (cc); |
| 1013 | bad: |
| 1014 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1015 | "Error fetching data for field \"%s\"", |
| 1016 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1017 | return (tsize_t) 0; |
| 1018 | } |
| 1019 | |
| 1020 | /* |
| 1021 | * Fetch an ASCII item from the file. |
| 1022 | */ |
| 1023 | static tsize_t |
| 1024 | TIFFFetchString(TIFF* tif, TIFFDirEntry* dir, char* cp) |
| 1025 | { |
| 1026 | if (dir->tdir_count <= 4) { |
| 1027 | uint32 l = dir->tdir_offset; |
| 1028 | if (tif->tif_flags & TIFF_SWAB) |
| 1029 | TIFFSwabLong(&l); |
| 1030 | _TIFFmemcpy(cp, &l, dir->tdir_count); |
| 1031 | return (1); |
| 1032 | } |
| 1033 | return (TIFFFetchData(tif, dir, cp)); |
| 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * Convert numerator+denominator to float. |
| 1038 | */ |
| 1039 | static int |
| 1040 | cvtRational(TIFF* tif, TIFFDirEntry* dir, uint32 num, uint32 denom, float* rv) |
| 1041 | { |
| 1042 | if (denom == 0) { |
| 1043 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1044 | "%s: Rational with zero denominator (num = %lu)", |
| 1045 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, num); |
| 1046 | return (0); |
| 1047 | } else { |
| 1048 | if (dir->tdir_type == TIFF_RATIONAL) |
| 1049 | *rv = ((float)num / (float)denom); |
| 1050 | else |
| 1051 | *rv = ((float)(int32)num / (float)(int32)denom); |
| 1052 | return (1); |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | /* |
| 1057 | * Fetch a rational item from the file |
| 1058 | * at offset off and return the value |
| 1059 | * as a floating point number. |
| 1060 | */ |
| 1061 | static float |
| 1062 | TIFFFetchRational(TIFF* tif, TIFFDirEntry* dir) |
| 1063 | { |
| 1064 | uint32 l[2]; |
| 1065 | float v; |
| 1066 | |
| 1067 | return (!TIFFFetchData(tif, dir, (char *)l) || |
| 1068 | !cvtRational(tif, dir, l[0], l[1], &v) ? 1.0f : v); |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * Fetch a single floating point value |
| 1073 | * from the offset field and return it |
| 1074 | * as a native float. |
| 1075 | */ |
| 1076 | static float |
| 1077 | TIFFFetchFloat(TIFF* tif, TIFFDirEntry* dir) |
| 1078 | { |
| 1079 | float v; |
| 1080 | int32 l = TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset); |
| 1081 | _TIFFmemcpy(&v, &l, sizeof(float)); |
| 1082 | TIFFCvtIEEEFloatToNative(tif, 1, &v); |
| 1083 | return (v); |
| 1084 | } |
| 1085 | |
| 1086 | /* |
| 1087 | * Fetch an array of BYTE or SBYTE values. |
| 1088 | */ |
| 1089 | static int |
| 1090 | TIFFFetchByteArray(TIFF* tif, TIFFDirEntry* dir, uint8* v) |
| 1091 | { |
| 1092 | if (dir->tdir_count <= 4) { |
| 1093 | /* |
| 1094 | * Extract data from offset field. |
| 1095 | */ |
| 1096 | if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { |
| 1097 | if (dir->tdir_type == TIFF_SBYTE) |
| 1098 | switch (dir->tdir_count) { |
| 1099 | case 4: v[3] = dir->tdir_offset & 0xff; |
| 1100 | case 3: v[2] = (dir->tdir_offset >> 8) & 0xff; |
| 1101 | case 2: v[1] = (dir->tdir_offset >> 16) & 0xff; |
| 1102 | case 1: v[0] = dir->tdir_offset >> 24; |
| 1103 | } |
| 1104 | else |
| 1105 | switch (dir->tdir_count) { |
| 1106 | case 4: v[3] = dir->tdir_offset & 0xff; |
| 1107 | case 3: v[2] = (dir->tdir_offset >> 8) & 0xff; |
| 1108 | case 2: v[1] = (dir->tdir_offset >> 16) & 0xff; |
| 1109 | case 1: v[0] = dir->tdir_offset >> 24; |
| 1110 | } |
| 1111 | } else { |
| 1112 | if (dir->tdir_type == TIFF_SBYTE) |
| 1113 | switch (dir->tdir_count) { |
| 1114 | case 4: v[3] = dir->tdir_offset >> 24; |
| 1115 | case 3: v[2] = (dir->tdir_offset >> 16) & 0xff; |
| 1116 | case 2: v[1] = (dir->tdir_offset >> 8) & 0xff; |
| 1117 | case 1: v[0] = dir->tdir_offset & 0xff; |
| 1118 | } |
| 1119 | else |
| 1120 | switch (dir->tdir_count) { |
| 1121 | case 4: v[3] = dir->tdir_offset >> 24; |
| 1122 | case 3: v[2] = (dir->tdir_offset >> 16) & 0xff; |
| 1123 | case 2: v[1] = (dir->tdir_offset >> 8) & 0xff; |
| 1124 | case 1: v[0] = dir->tdir_offset & 0xff; |
| 1125 | } |
| 1126 | } |
| 1127 | return (1); |
| 1128 | } else |
| 1129 | return (TIFFFetchData(tif, dir, (char*) v) != 0); /* XXX */ |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * Fetch an array of SHORT or SSHORT values. |
| 1134 | */ |
| 1135 | static int |
| 1136 | TIFFFetchShortArray(TIFF* tif, TIFFDirEntry* dir, uint16* v) |
| 1137 | { |
| 1138 | if (dir->tdir_count <= 2) { |
| 1139 | if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { |
| 1140 | switch (dir->tdir_count) { |
| 1141 | case 2: v[1] = (uint16) (dir->tdir_offset & 0xffff); |
| 1142 | case 1: v[0] = (uint16) (dir->tdir_offset >> 16); |
| 1143 | } |
| 1144 | } else { |
| 1145 | switch (dir->tdir_count) { |
| 1146 | case 2: v[1] = (uint16) (dir->tdir_offset >> 16); |
| 1147 | case 1: v[0] = (uint16) (dir->tdir_offset & 0xffff); |
| 1148 | } |
| 1149 | } |
| 1150 | return (1); |
| 1151 | } else |
| 1152 | return (TIFFFetchData(tif, dir, (char *)v) != 0); |
| 1153 | } |
| 1154 | |
| 1155 | /* |
| 1156 | * Fetch a pair of SHORT or BYTE values. Some tags may have either BYTE |
| 1157 | * or SHORT type and this function works with both ones. |
| 1158 | */ |
| 1159 | static int |
| 1160 | TIFFFetchShortPair(TIFF* tif, TIFFDirEntry* dir) |
| 1161 | { |
| 1162 | switch (dir->tdir_type) { |
| 1163 | case TIFF_BYTE: |
| 1164 | case TIFF_SBYTE: |
| 1165 | { |
| 1166 | uint8 v[4]; |
| 1167 | return TIFFFetchByteArray(tif, dir, v) |
| 1168 | && TIFFSetField(tif, dir->tdir_tag, v[0], v[1]); |
| 1169 | } |
| 1170 | case TIFF_SHORT: |
| 1171 | case TIFF_SSHORT: |
| 1172 | { |
| 1173 | uint16 v[2]; |
| 1174 | return TIFFFetchShortArray(tif, dir, v) |
| 1175 | && TIFFSetField(tif, dir->tdir_tag, v[0], v[1]); |
| 1176 | } |
| 1177 | default: |
| 1178 | return 0; |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | /* |
| 1183 | * Fetch an array of LONG or SLONG values. |
| 1184 | */ |
| 1185 | static int |
| 1186 | TIFFFetchLongArray(TIFF* tif, TIFFDirEntry* dir, uint32* v) |
| 1187 | { |
| 1188 | if (dir->tdir_count == 1) { |
| 1189 | v[0] = dir->tdir_offset; |
| 1190 | return (1); |
| 1191 | } else |
| 1192 | return (TIFFFetchData(tif, dir, (char*) v) != 0); |
| 1193 | } |
| 1194 | |
| 1195 | /* |
| 1196 | * Fetch an array of RATIONAL or SRATIONAL values. |
| 1197 | */ |
| 1198 | static int |
| 1199 | TIFFFetchRationalArray(TIFF* tif, TIFFDirEntry* dir, float* v) |
| 1200 | { |
| 1201 | int ok = 0; |
| 1202 | uint32* l; |
| 1203 | |
| 1204 | l = (uint32*)_TIFFCheckMalloc(tif, |
| 1205 | dir->tdir_count, TIFFDataWidth((TIFFDataType) dir->tdir_type), |
| 1206 | "to fetch array of rationals"); |
| 1207 | if (l) { |
| 1208 | if (TIFFFetchData(tif, dir, (char *)l)) { |
| 1209 | uint32 i; |
| 1210 | for (i = 0; i < dir->tdir_count; i++) { |
| 1211 | ok = cvtRational(tif, dir, |
| 1212 | l[2*i+0], l[2*i+1], &v[i]); |
| 1213 | if (!ok) |
| 1214 | break; |
| 1215 | } |
| 1216 | } |
| 1217 | _TIFFfree((char *)l); |
| 1218 | } |
| 1219 | return (ok); |
| 1220 | } |
| 1221 | |
| 1222 | /* |
| 1223 | * Fetch an array of FLOAT values. |
| 1224 | */ |
| 1225 | static int |
| 1226 | TIFFFetchFloatArray(TIFF* tif, TIFFDirEntry* dir, float* v) |
| 1227 | { |
| 1228 | |
| 1229 | if (dir->tdir_count == 1) { |
| 1230 | v[0] = *(float*) &dir->tdir_offset; |
| 1231 | TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v); |
| 1232 | return (1); |
| 1233 | } else if (TIFFFetchData(tif, dir, (char*) v)) { |
| 1234 | TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v); |
| 1235 | return (1); |
| 1236 | } else |
| 1237 | return (0); |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * Fetch an array of DOUBLE values. |
| 1242 | */ |
| 1243 | static int |
| 1244 | TIFFFetchDoubleArray(TIFF* tif, TIFFDirEntry* dir, double* v) |
| 1245 | { |
| 1246 | if (TIFFFetchData(tif, dir, (char*) v)) { |
| 1247 | TIFFCvtIEEEDoubleToNative(tif, dir->tdir_count, v); |
| 1248 | return (1); |
| 1249 | } else |
| 1250 | return (0); |
| 1251 | } |
| 1252 | |
| 1253 | /* |
| 1254 | * Fetch an array of ANY values. The actual values are |
| 1255 | * returned as doubles which should be able hold all the |
| 1256 | * types. Yes, there really should be an tany_t to avoid |
| 1257 | * this potential non-portability ... Note in particular |
| 1258 | * that we assume that the double return value vector is |
| 1259 | * large enough to read in any fundamental type. We use |
| 1260 | * that vector as a buffer to read in the base type vector |
| 1261 | * and then convert it in place to double (from end |
| 1262 | * to front of course). |
| 1263 | */ |
| 1264 | static int |
| 1265 | TIFFFetchAnyArray(TIFF* tif, TIFFDirEntry* dir, double* v) |
| 1266 | { |
| 1267 | int i; |
| 1268 | |
| 1269 | switch (dir->tdir_type) { |
| 1270 | case TIFF_BYTE: |
| 1271 | case TIFF_SBYTE: |
| 1272 | if (!TIFFFetchByteArray(tif, dir, (uint8*) v)) |
| 1273 | return (0); |
| 1274 | if (dir->tdir_type == TIFF_BYTE) { |
| 1275 | uint8* vp = (uint8*) v; |
| 1276 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1277 | v[i] = vp[i]; |
| 1278 | } else { |
| 1279 | int8* vp = (int8*) v; |
| 1280 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1281 | v[i] = vp[i]; |
| 1282 | } |
| 1283 | break; |
| 1284 | case TIFF_SHORT: |
| 1285 | case TIFF_SSHORT: |
| 1286 | if (!TIFFFetchShortArray(tif, dir, (uint16*) v)) |
| 1287 | return (0); |
| 1288 | if (dir->tdir_type == TIFF_SHORT) { |
| 1289 | uint16* vp = (uint16*) v; |
| 1290 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1291 | v[i] = vp[i]; |
| 1292 | } else { |
| 1293 | int16* vp = (int16*) v; |
| 1294 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1295 | v[i] = vp[i]; |
| 1296 | } |
| 1297 | break; |
| 1298 | case TIFF_LONG: |
| 1299 | case TIFF_SLONG: |
| 1300 | if (!TIFFFetchLongArray(tif, dir, (uint32*) v)) |
| 1301 | return (0); |
| 1302 | if (dir->tdir_type == TIFF_LONG) { |
| 1303 | uint32* vp = (uint32*) v; |
| 1304 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1305 | v[i] = vp[i]; |
| 1306 | } else { |
| 1307 | int32* vp = (int32*) v; |
| 1308 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1309 | v[i] = vp[i]; |
| 1310 | } |
| 1311 | break; |
| 1312 | case TIFF_RATIONAL: |
| 1313 | case TIFF_SRATIONAL: |
| 1314 | if (!TIFFFetchRationalArray(tif, dir, (float*) v)) |
| 1315 | return (0); |
| 1316 | { float* vp = (float*) v; |
| 1317 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1318 | v[i] = vp[i]; |
| 1319 | } |
| 1320 | break; |
| 1321 | case TIFF_FLOAT: |
| 1322 | if (!TIFFFetchFloatArray(tif, dir, (float*) v)) |
| 1323 | return (0); |
| 1324 | { float* vp = (float*) v; |
| 1325 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 1326 | v[i] = vp[i]; |
| 1327 | } |
| 1328 | break; |
| 1329 | case TIFF_DOUBLE: |
| 1330 | return (TIFFFetchDoubleArray(tif, dir, (double*) v)); |
| 1331 | default: |
| 1332 | /* TIFF_NOTYPE */ |
| 1333 | /* TIFF_ASCII */ |
| 1334 | /* TIFF_UNDEFINED */ |
| 1335 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1336 | "cannot read TIFF_ANY type %d for field \"%s\"", |
| 1337 | dir->tdir_type, |
| 1338 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1339 | return (0); |
| 1340 | } |
| 1341 | return (1); |
| 1342 | } |
| 1343 | |
| 1344 | /* |
| 1345 | * Fetch a tag that is not handled by special case code. |
| 1346 | */ |
| 1347 | static int |
| 1348 | TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp) |
| 1349 | { |
| 1350 | static const char mesg[] = "to fetch tag value"; |
| 1351 | int ok = 0; |
| 1352 | const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dp->tdir_tag); |
| 1353 | |
| 1354 | if (dp->tdir_count > 1) { /* array of values */ |
| 1355 | char* cp = NULL; |
| 1356 | |
| 1357 | switch (dp->tdir_type) { |
| 1358 | case TIFF_BYTE: |
| 1359 | case TIFF_SBYTE: |
| 1360 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1361 | dp->tdir_count, sizeof (uint8), mesg); |
| 1362 | ok = cp && TIFFFetchByteArray(tif, dp, (uint8*) cp); |
| 1363 | break; |
| 1364 | case TIFF_SHORT: |
| 1365 | case TIFF_SSHORT: |
| 1366 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1367 | dp->tdir_count, sizeof (uint16), mesg); |
| 1368 | ok = cp && TIFFFetchShortArray(tif, dp, (uint16*) cp); |
| 1369 | break; |
| 1370 | case TIFF_LONG: |
| 1371 | case TIFF_SLONG: |
| 1372 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1373 | dp->tdir_count, sizeof (uint32), mesg); |
| 1374 | ok = cp && TIFFFetchLongArray(tif, dp, (uint32*) cp); |
| 1375 | break; |
| 1376 | case TIFF_RATIONAL: |
| 1377 | case TIFF_SRATIONAL: |
| 1378 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1379 | dp->tdir_count, sizeof (float), mesg); |
| 1380 | ok = cp && TIFFFetchRationalArray(tif, dp, (float*) cp); |
| 1381 | break; |
| 1382 | case TIFF_FLOAT: |
| 1383 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1384 | dp->tdir_count, sizeof (float), mesg); |
| 1385 | ok = cp && TIFFFetchFloatArray(tif, dp, (float*) cp); |
| 1386 | break; |
| 1387 | case TIFF_DOUBLE: |
| 1388 | cp = (char *)_TIFFCheckMalloc(tif, |
| 1389 | dp->tdir_count, sizeof (double), mesg); |
| 1390 | ok = cp && TIFFFetchDoubleArray(tif, dp, (double*) cp); |
| 1391 | break; |
| 1392 | case TIFF_ASCII: |
| 1393 | case TIFF_UNDEFINED: /* bit of a cheat... */ |
| 1394 | /* |
| 1395 | * Some vendors write strings w/o the trailing |
| 1396 | * NULL byte, so always append one just in case. |
| 1397 | */ |
| 1398 | cp = (char *)_TIFFCheckMalloc(tif, dp->tdir_count + 1, |
| 1399 | 1, mesg); |
| 1400 | if( (ok = (cp && TIFFFetchString(tif, dp, cp))) != 0 ) |
| 1401 | cp[dp->tdir_count] = '\0'; /* XXX */ |
| 1402 | break; |
| 1403 | } |
| 1404 | if (ok) { |
| 1405 | ok = (fip->field_passcount ? |
| 1406 | TIFFSetField(tif, dp->tdir_tag, dp->tdir_count, cp) |
| 1407 | : TIFFSetField(tif, dp->tdir_tag, cp)); |
| 1408 | } |
| 1409 | if (cp != NULL) |
| 1410 | _TIFFfree(cp); |
| 1411 | } else if (CheckDirCount(tif, dp, 1)) { /* singleton value */ |
| 1412 | switch (dp->tdir_type) { |
| 1413 | case TIFF_BYTE: |
| 1414 | case TIFF_SBYTE: |
| 1415 | case TIFF_SHORT: |
| 1416 | case TIFF_SSHORT: |
| 1417 | /* |
| 1418 | * If the tag is also acceptable as a LONG or SLONG |
| 1419 | * then TIFFSetField will expect an uint32 parameter |
| 1420 | * passed to it (through varargs). Thus, for machines |
| 1421 | * where sizeof (int) != sizeof (uint32) we must do |
| 1422 | * a careful check here. It's hard to say if this |
| 1423 | * is worth optimizing. |
| 1424 | * |
| 1425 | * NB: We use TIFFFieldWithTag here knowing that |
| 1426 | * it returns us the first entry in the table |
| 1427 | * for the tag and that that entry is for the |
| 1428 | * widest potential data type the tag may have. |
| 1429 | */ |
| 1430 | { TIFFDataType type = fip->field_type; |
| 1431 | if (type != TIFF_LONG && type != TIFF_SLONG) { |
| 1432 | uint16 v = (uint16) |
| 1433 | TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset); |
| 1434 | ok = (fip->field_passcount ? |
| 1435 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1436 | : TIFFSetField(tif, dp->tdir_tag, v)); |
| 1437 | break; |
| 1438 | } |
| 1439 | } |
| 1440 | /* fall thru... */ |
| 1441 | case TIFF_LONG: |
| 1442 | case TIFF_SLONG: |
| 1443 | { uint32 v32 = |
| 1444 | TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset); |
| 1445 | ok = (fip->field_passcount ? |
| 1446 | TIFFSetField(tif, dp->tdir_tag, 1, &v32) |
| 1447 | : TIFFSetField(tif, dp->tdir_tag, v32)); |
| 1448 | } |
| 1449 | break; |
| 1450 | case TIFF_RATIONAL: |
| 1451 | case TIFF_SRATIONAL: |
| 1452 | case TIFF_FLOAT: |
| 1453 | { float v = (dp->tdir_type == TIFF_FLOAT ? |
| 1454 | TIFFFetchFloat(tif, dp) |
| 1455 | : TIFFFetchRational(tif, dp)); |
| 1456 | ok = (fip->field_passcount ? |
| 1457 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1458 | : TIFFSetField(tif, dp->tdir_tag, v)); |
| 1459 | } |
| 1460 | break; |
| 1461 | case TIFF_DOUBLE: |
| 1462 | { double v; |
| 1463 | ok = (TIFFFetchDoubleArray(tif, dp, &v) && |
| 1464 | (fip->field_passcount ? |
| 1465 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1466 | : TIFFSetField(tif, dp->tdir_tag, v)) |
| 1467 | ); |
| 1468 | } |
| 1469 | break; |
| 1470 | case TIFF_ASCII: |
| 1471 | case TIFF_UNDEFINED: /* bit of a cheat... */ |
| 1472 | { char c[2]; |
| 1473 | if( (ok = (TIFFFetchString(tif, dp, c) != 0)) != 0 ) { |
| 1474 | c[1] = '\0'; /* XXX paranoid */ |
| 1475 | ok = (fip->field_passcount ? |
| 1476 | TIFFSetField(tif, dp->tdir_tag, 1, c) |
| 1477 | : TIFFSetField(tif, dp->tdir_tag, c)); |
| 1478 | } |
| 1479 | } |
| 1480 | break; |
| 1481 | } |
| 1482 | } |
| 1483 | return (ok); |
| 1484 | } |
| 1485 | |
| 1486 | #define NITEMS(x) (sizeof (x) / sizeof (x[0])) |
| 1487 | /* |
| 1488 | * Fetch samples/pixel short values for |
| 1489 | * the specified tag and verify that |
| 1490 | * all values are the same. |
| 1491 | */ |
| 1492 | static int |
| 1493 | TIFFFetchPerSampleShorts(TIFF* tif, TIFFDirEntry* dir, uint16* pl) |
| 1494 | { |
| 1495 | uint16 samples = tif->tif_dir.td_samplesperpixel; |
| 1496 | int status = 0; |
| 1497 | |
| 1498 | if (CheckDirCount(tif, dir, (uint32) samples)) { |
| 1499 | uint16 buf[10]; |
| 1500 | uint16* v = buf; |
| 1501 | |
| 1502 | if (dir->tdir_count > NITEMS(buf)) |
| 1503 | v = (uint16*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof(uint16), |
| 1504 | "to fetch per-sample values"); |
| 1505 | if (v && TIFFFetchShortArray(tif, dir, v)) { |
| 1506 | uint16 i; |
| 1507 | int check_count = dir->tdir_count; |
| 1508 | if( samples < check_count ) |
| 1509 | check_count = samples; |
| 1510 | |
| 1511 | for (i = 1; i < check_count; i++) |
| 1512 | if (v[i] != v[0]) { |
| 1513 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1514 | "Cannot handle different per-sample values for field \"%s\"", |
| 1515 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1516 | goto bad; |
| 1517 | } |
| 1518 | *pl = v[0]; |
| 1519 | status = 1; |
| 1520 | } |
| 1521 | bad: |
| 1522 | if (v && v != buf) |
| 1523 | _TIFFfree(v); |
| 1524 | } |
| 1525 | return (status); |
| 1526 | } |
| 1527 | |
| 1528 | /* |
| 1529 | * Fetch samples/pixel long values for |
| 1530 | * the specified tag and verify that |
| 1531 | * all values are the same. |
| 1532 | */ |
| 1533 | static int |
| 1534 | TIFFFetchPerSampleLongs(TIFF* tif, TIFFDirEntry* dir, uint32* pl) |
| 1535 | { |
| 1536 | uint16 samples = tif->tif_dir.td_samplesperpixel; |
| 1537 | int status = 0; |
| 1538 | |
| 1539 | if (CheckDirCount(tif, dir, (uint32) samples)) { |
| 1540 | uint32 buf[10]; |
| 1541 | uint32* v = buf; |
| 1542 | |
| 1543 | if (dir->tdir_count > NITEMS(buf)) |
| 1544 | v = (uint32*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof(uint32), |
| 1545 | "to fetch per-sample values"); |
| 1546 | if (v && TIFFFetchLongArray(tif, dir, v)) { |
| 1547 | uint16 i; |
| 1548 | int check_count = dir->tdir_count; |
| 1549 | |
| 1550 | if( samples < check_count ) |
| 1551 | check_count = samples; |
| 1552 | for (i = 1; i < check_count; i++) |
| 1553 | if (v[i] != v[0]) { |
| 1554 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1555 | "Cannot handle different per-sample values for field \"%s\"", |
| 1556 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1557 | goto bad; |
| 1558 | } |
| 1559 | *pl = v[0]; |
| 1560 | status = 1; |
| 1561 | } |
| 1562 | bad: |
| 1563 | if (v && v != buf) |
| 1564 | _TIFFfree(v); |
| 1565 | } |
| 1566 | return (status); |
| 1567 | } |
| 1568 | |
| 1569 | /* |
| 1570 | * Fetch samples/pixel ANY values for the specified tag and verify that all |
| 1571 | * values are the same. |
| 1572 | */ |
| 1573 | static int |
| 1574 | TIFFFetchPerSampleAnys(TIFF* tif, TIFFDirEntry* dir, double* pl) |
| 1575 | { |
| 1576 | uint16 samples = tif->tif_dir.td_samplesperpixel; |
| 1577 | int status = 0; |
| 1578 | |
| 1579 | if (CheckDirCount(tif, dir, (uint32) samples)) { |
| 1580 | double buf[10]; |
| 1581 | double* v = buf; |
| 1582 | |
| 1583 | if (dir->tdir_count > NITEMS(buf)) |
| 1584 | v = (double*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof (double), |
| 1585 | "to fetch per-sample values"); |
| 1586 | if (v && TIFFFetchAnyArray(tif, dir, v)) { |
| 1587 | uint16 i; |
| 1588 | int check_count = dir->tdir_count; |
| 1589 | if( samples < check_count ) |
| 1590 | check_count = samples; |
| 1591 | |
| 1592 | for (i = 1; i < check_count; i++) |
| 1593 | if (v[i] != v[0]) { |
| 1594 | TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
| 1595 | "Cannot handle different per-sample values for field \"%s\"", |
| 1596 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1597 | goto bad; |
| 1598 | } |
| 1599 | *pl = v[0]; |
| 1600 | status = 1; |
| 1601 | } |
| 1602 | bad: |
| 1603 | if (v && v != buf) |
| 1604 | _TIFFfree(v); |
| 1605 | } |
| 1606 | return (status); |
| 1607 | } |
| 1608 | #undef NITEMS |
| 1609 | |
| 1610 | /* |
| 1611 | * Fetch a set of offsets or lengths. |
| 1612 | * While this routine says "strips", in fact it's also used for tiles. |
| 1613 | */ |
| 1614 | static int |
| 1615 | TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, long nstrips, uint32** lpp) |
| 1616 | { |
| 1617 | register uint32* lp; |
| 1618 | int status; |
| 1619 | |
| 1620 | CheckDirCount(tif, dir, (uint32) nstrips); |
| 1621 | |
| 1622 | /* |
| 1623 | * Allocate space for strip information. |
| 1624 | */ |
| 1625 | if (*lpp == NULL && |
| 1626 | (*lpp = (uint32 *)_TIFFCheckMalloc(tif, |
| 1627 | nstrips, sizeof (uint32), "for strip array")) == NULL) |
| 1628 | return (0); |
| 1629 | lp = *lpp; |
| 1630 | _TIFFmemset( lp, 0, sizeof(uint32) * nstrips ); |
| 1631 | |
| 1632 | if (dir->tdir_type == (int)TIFF_SHORT) { |
| 1633 | /* |
| 1634 | * Handle uint16->uint32 expansion. |
| 1635 | */ |
| 1636 | uint16* dp = (uint16*) _TIFFCheckMalloc(tif, |
| 1637 | dir->tdir_count, sizeof (uint16), "to fetch strip tag"); |
| 1638 | if (dp == NULL) |
| 1639 | return (0); |
| 1640 | if( (status = TIFFFetchShortArray(tif, dir, dp)) != 0 ) { |
| 1641 | int i; |
| 1642 | |
| 1643 | for( i = 0; i < nstrips && i < (int) dir->tdir_count; i++ ) |
| 1644 | { |
| 1645 | lp[i] = dp[i]; |
| 1646 | } |
| 1647 | } |
| 1648 | _TIFFfree((char*) dp); |
| 1649 | |
| 1650 | } else if( nstrips != (int) dir->tdir_count ) { |
| 1651 | /* Special case to correct length */ |
| 1652 | |
| 1653 | uint32* dp = (uint32*) _TIFFCheckMalloc(tif, |
| 1654 | dir->tdir_count, sizeof (uint32), "to fetch strip tag"); |
| 1655 | if (dp == NULL) |
| 1656 | return (0); |
| 1657 | |
| 1658 | status = TIFFFetchLongArray(tif, dir, dp); |
| 1659 | if( status != 0 ) { |
| 1660 | int i; |
| 1661 | |
| 1662 | for( i = 0; i < nstrips && i < (int) dir->tdir_count; i++ ) |
| 1663 | { |
| 1664 | lp[i] = dp[i]; |
| 1665 | } |
| 1666 | } |
| 1667 | |
| 1668 | _TIFFfree( (char *) dp ); |
| 1669 | } else |
| 1670 | status = TIFFFetchLongArray(tif, dir, lp); |
| 1671 | |
| 1672 | return (status); |
| 1673 | } |
| 1674 | |
| 1675 | /* |
| 1676 | * Fetch and set the RefBlackWhite tag. |
| 1677 | */ |
| 1678 | static int |
| 1679 | TIFFFetchRefBlackWhite(TIFF* tif, TIFFDirEntry* dir) |
| 1680 | { |
| 1681 | static const char mesg[] = "for \"ReferenceBlackWhite\" array"; |
| 1682 | char* cp; |
| 1683 | int ok; |
| 1684 | |
| 1685 | if (dir->tdir_type == TIFF_RATIONAL) |
| 1686 | return (TIFFFetchNormalTag(tif, dir)); |
| 1687 | /* |
| 1688 | * Handle LONG's for backward compatibility. |
| 1689 | */ |
| 1690 | cp = (char *)_TIFFCheckMalloc(tif, dir->tdir_count, |
| 1691 | sizeof (uint32), mesg); |
| 1692 | if( (ok = (cp && TIFFFetchLongArray(tif, dir, (uint32*) cp))) != 0) { |
| 1693 | float* fp = (float*) |
| 1694 | _TIFFCheckMalloc(tif, dir->tdir_count, sizeof (float), mesg); |
| 1695 | if( (ok = (fp != NULL)) != 0 ) { |
| 1696 | uint32 i; |
| 1697 | for (i = 0; i < dir->tdir_count; i++) |
| 1698 | fp[i] = (float)((uint32*) cp)[i]; |
| 1699 | ok = TIFFSetField(tif, dir->tdir_tag, fp); |
| 1700 | _TIFFfree((char*) fp); |
| 1701 | } |
| 1702 | } |
| 1703 | if (cp) |
| 1704 | _TIFFfree(cp); |
| 1705 | return (ok); |
| 1706 | } |
| 1707 | |
| 1708 | /* |
| 1709 | * Replace a single strip (tile) of uncompressed data by |
| 1710 | * multiple strips (tiles), each approximately 8Kbytes. |
| 1711 | * This is useful for dealing with large images or |
| 1712 | * for dealing with machines with a limited amount |
| 1713 | * memory. |
| 1714 | */ |
| 1715 | static void |
| 1716 | ChopUpSingleUncompressedStrip(TIFF* tif) |
| 1717 | { |
| 1718 | register TIFFDirectory *td = &tif->tif_dir; |
| 1719 | uint32 bytecount = td->td_stripbytecount[0]; |
| 1720 | uint32 offset = td->td_stripoffset[0]; |
| 1721 | tsize_t rowbytes = TIFFVTileSize(tif, 1), stripbytes; |
| 1722 | tstrip_t strip, nstrips, rowsperstrip; |
| 1723 | uint32* newcounts; |
| 1724 | uint32* newoffsets; |
| 1725 | |
| 1726 | /* |
| 1727 | * Make the rows hold at least one scanline, but fill specified amount |
| 1728 | * of data if possible. |
| 1729 | */ |
| 1730 | if (rowbytes > STRIP_SIZE_DEFAULT) { |
| 1731 | stripbytes = rowbytes; |
| 1732 | rowsperstrip = 1; |
| 1733 | } else if (rowbytes > 0 ) { |
| 1734 | rowsperstrip = STRIP_SIZE_DEFAULT / rowbytes; |
| 1735 | stripbytes = rowbytes * rowsperstrip; |
| 1736 | } |
| 1737 | else |
| 1738 | return; |
| 1739 | |
| 1740 | /* |
| 1741 | * never increase the number of strips in an image |
| 1742 | */ |
| 1743 | if (rowsperstrip >= td->td_rowsperstrip) |
| 1744 | return; |
| 1745 | nstrips = (tstrip_t) TIFFhowmany(bytecount, stripbytes); |
| 1746 | if( nstrips == 0 ) /* something is wonky, do nothing. */ |
| 1747 | return; |
| 1748 | |
| 1749 | newcounts = (uint32*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint32), |
| 1750 | "for chopped \"StripByteCounts\" array"); |
| 1751 | newoffsets = (uint32*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint32), |
| 1752 | "for chopped \"StripOffsets\" array"); |
| 1753 | if (newcounts == NULL || newoffsets == NULL) { |
| 1754 | /* |
| 1755 | * Unable to allocate new strip information, give |
| 1756 | * up and use the original one strip information. |
| 1757 | */ |
| 1758 | if (newcounts != NULL) |
| 1759 | _TIFFfree(newcounts); |
| 1760 | if (newoffsets != NULL) |
| 1761 | _TIFFfree(newoffsets); |
| 1762 | return; |
| 1763 | } |
| 1764 | /* |
| 1765 | * Fill the strip information arrays with new bytecounts and offsets |
| 1766 | * that reflect the broken-up format. |
| 1767 | */ |
| 1768 | for (strip = 0; strip < nstrips; strip++) { |
| 1769 | if (stripbytes > (tsize_t) bytecount) |
| 1770 | stripbytes = bytecount; |
| 1771 | newcounts[strip] = stripbytes; |
| 1772 | newoffsets[strip] = offset; |
| 1773 | offset += stripbytes; |
| 1774 | bytecount -= stripbytes; |
| 1775 | } |
| 1776 | /* |
| 1777 | * Replace old single strip info with multi-strip info. |
| 1778 | */ |
| 1779 | td->td_stripsperimage = td->td_nstrips = nstrips; |
| 1780 | TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip); |
| 1781 | |
| 1782 | _TIFFfree(td->td_stripbytecount); |
| 1783 | _TIFFfree(td->td_stripoffset); |
| 1784 | td->td_stripbytecount = newcounts; |
| 1785 | td->td_stripoffset = newoffsets; |
| 1786 | td->td_stripbytecountsorted = 1; |
| 1787 | } |
| 1788 | |
| 1789 | /* vim: set ts=8 sts=8 sw=8 noet: */ |