| 1 | /* $Header$ */ |
| 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 | #if 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 void 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*, int*); |
| 52 | static int TIFFFetchPerSampleAnys(TIFF*, TIFFDirEntry*, double*); |
| 53 | static int TIFFFetchShortArray(TIFF*, TIFFDirEntry*, uint16*); |
| 54 | static int TIFFFetchStripThing(TIFF*, TIFFDirEntry*, long, uint32**); |
| 55 | static int TIFFFetchExtraSamples(TIFF*, TIFFDirEntry*); |
| 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 | static char * |
| 65 | CheckMalloc(TIFF* tif, tsize_t n, const char* what) |
| 66 | { |
| 67 | char *cp = (char*)_TIFFmalloc(n); |
| 68 | if (cp == NULL) |
| 69 | TIFFError(tif->tif_name, "No space %s", what); |
| 70 | return (cp); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Read the next TIFF directory from a file |
| 75 | * and convert it to the internal format. |
| 76 | * We read directories sequentially. |
| 77 | */ |
| 78 | int |
| 79 | TIFFReadDirectory(TIFF* tif) |
| 80 | { |
| 81 | register TIFFDirEntry* dp; |
| 82 | register int n; |
| 83 | register TIFFDirectory* td; |
| 84 | TIFFDirEntry* dir; |
| 85 | int iv; |
| 86 | long v; |
| 87 | double dv; |
| 88 | const TIFFFieldInfo* fip; |
| 89 | int fix; |
| 90 | uint16 dircount; |
| 91 | uint32 nextdiroff; |
| 92 | char* cp; |
| 93 | int diroutoforderwarning = 0; |
| 94 | |
| 95 | tif->tif_diroff = tif->tif_nextdiroff; |
| 96 | if (tif->tif_diroff == 0) /* no more directories */ |
| 97 | return (0); |
| 98 | /* |
| 99 | * Cleanup any previous compression state. |
| 100 | */ |
| 101 | (*tif->tif_cleanup)(tif); |
| 102 | tif->tif_curdir++; |
| 103 | nextdiroff = 0; |
| 104 | if (!isMapped(tif)) { |
| 105 | if (!SeekOK(tif, tif->tif_diroff)) { |
| 106 | TIFFError(tif->tif_name, |
| 107 | "Seek error accessing TIFF directory"); |
| 108 | return (0); |
| 109 | } |
| 110 | if (!ReadOK(tif, &dircount, sizeof (uint16))) { |
| 111 | TIFFError(tif->tif_name, |
| 112 | "Can not read TIFF directory count"); |
| 113 | return (0); |
| 114 | } |
| 115 | if (tif->tif_flags & TIFF_SWAB) |
| 116 | TIFFSwabShort(&dircount); |
| 117 | dir = (TIFFDirEntry *)CheckMalloc(tif, |
| 118 | dircount * sizeof (TIFFDirEntry), "to read TIFF directory"); |
| 119 | if (dir == NULL) |
| 120 | return (0); |
| 121 | if (!ReadOK(tif, dir, dircount*sizeof (TIFFDirEntry))) { |
| 122 | TIFFError(tif->tif_name, "Can not read TIFF directory"); |
| 123 | goto bad; |
| 124 | } |
| 125 | /* |
| 126 | * Read offset to next directory for sequential scans. |
| 127 | */ |
| 128 | (void) ReadOK(tif, &nextdiroff, sizeof (uint32)); |
| 129 | } else { |
| 130 | toff_t off = tif->tif_diroff; |
| 131 | |
| 132 | if (off + sizeof (uint16) > tif->tif_size) { |
| 133 | TIFFError(tif->tif_name, |
| 134 | "Can not read TIFF directory count"); |
| 135 | return (0); |
| 136 | } else |
| 137 | _TIFFmemcpy(&dircount, tif->tif_base + off, sizeof (uint16)); |
| 138 | off += sizeof (uint16); |
| 139 | if (tif->tif_flags & TIFF_SWAB) |
| 140 | TIFFSwabShort(&dircount); |
| 141 | dir = (TIFFDirEntry *)CheckMalloc(tif, |
| 142 | dircount * sizeof (TIFFDirEntry), "to read TIFF directory"); |
| 143 | if (dir == NULL) |
| 144 | return (0); |
| 145 | if (off + dircount*sizeof (TIFFDirEntry) > tif->tif_size) { |
| 146 | TIFFError(tif->tif_name, "Can not read TIFF directory"); |
| 147 | goto bad; |
| 148 | } else |
| 149 | _TIFFmemcpy(dir, tif->tif_base + off, |
| 150 | dircount*sizeof (TIFFDirEntry)); |
| 151 | off += dircount* sizeof (TIFFDirEntry); |
| 152 | if (off + sizeof (uint32) <= tif->tif_size) |
| 153 | _TIFFmemcpy(&nextdiroff, tif->tif_base+off, sizeof (uint32)); |
| 154 | } |
| 155 | if (tif->tif_flags & TIFF_SWAB) |
| 156 | TIFFSwabLong(&nextdiroff); |
| 157 | tif->tif_nextdiroff = nextdiroff; |
| 158 | |
| 159 | tif->tif_flags &= ~TIFF_BEENWRITING; /* reset before new dir */ |
| 160 | /* |
| 161 | * Setup default value and then make a pass over |
| 162 | * the fields to check type and tag information, |
| 163 | * and to extract info required to size data |
| 164 | * structures. A second pass is made afterwards |
| 165 | * to read in everthing not taken in the first pass. |
| 166 | */ |
| 167 | td = &tif->tif_dir; |
| 168 | /* free any old stuff and reinit */ |
| 169 | TIFFFreeDirectory(tif); |
| 170 | TIFFDefaultDirectory(tif); |
| 171 | /* |
| 172 | * Electronic Arts writes gray-scale TIFF files |
| 173 | * without a PlanarConfiguration directory entry. |
| 174 | * Thus we setup a default value here, even though |
| 175 | * the TIFF spec says there is no default value. |
| 176 | */ |
| 177 | TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG); |
| 178 | |
| 179 | /* |
| 180 | * Sigh, we must make a separate pass through the |
| 181 | * directory for the following reason: |
| 182 | * |
| 183 | * We must process the Compression tag in the first pass |
| 184 | * in order to merge in codec-private tag definitions (otherwise |
| 185 | * we may get complaints about unknown tags). However, the |
| 186 | * Compression tag may be dependent on the SamplesPerPixel |
| 187 | * tag value because older TIFF specs permited Compression |
| 188 | * to be written as a SamplesPerPixel-count tag entry. |
| 189 | * Thus if we don't first figure out the correct SamplesPerPixel |
| 190 | * tag value then we may end up ignoring the Compression tag |
| 191 | * value because it has an incorrect count value (if the |
| 192 | * true value of SamplesPerPixel is not 1). |
| 193 | * |
| 194 | * It sure would have been nice if Aldus had really thought |
| 195 | * this stuff through carefully. |
| 196 | */ |
| 197 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 198 | if (tif->tif_flags & TIFF_SWAB) { |
| 199 | TIFFSwabArrayOfShort(&dp->tdir_tag, 2); |
| 200 | TIFFSwabArrayOfLong(&dp->tdir_count, 2); |
| 201 | } |
| 202 | if (dp->tdir_tag == TIFFTAG_SAMPLESPERPIXEL) { |
| 203 | if (!TIFFFetchNormalTag(tif, dp)) |
| 204 | goto bad; |
| 205 | dp->tdir_tag = IGNORE; |
| 206 | } |
| 207 | } |
| 208 | /* |
| 209 | * First real pass over the directory. |
| 210 | */ |
| 211 | fix = 0; |
| 212 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 213 | |
| 214 | /* |
| 215 | * Find the field information entry for this tag. |
| 216 | * Added check for tags to ignore ... [BFC] |
| 217 | */ |
| 218 | if( TIFFReassignTagToIgnore(TIS_EXTRACT, dp->tdir_tag) ) |
| 219 | dp->tdir_tag = IGNORE; |
| 220 | |
| 221 | if (dp->tdir_tag == IGNORE) |
| 222 | continue; |
| 223 | |
| 224 | /* |
| 225 | * Silicon Beach (at least) writes unordered |
| 226 | * directory tags (violating the spec). Handle |
| 227 | * it here, but be obnoxious (maybe they'll fix it?). |
| 228 | */ |
| 229 | if (dp->tdir_tag < tif->tif_fieldinfo[fix]->field_tag) { |
| 230 | if (!diroutoforderwarning) { |
| 231 | TIFFWarning(tif->tif_name, |
| 232 | "invalid TIFF directory; tags are not sorted in ascending order"); |
| 233 | diroutoforderwarning = 1; |
| 234 | } |
| 235 | fix = 0; /* O(n^2) */ |
| 236 | } |
| 237 | while (fix < tif->tif_nfields && |
| 238 | tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) |
| 239 | fix++; |
| 240 | if (fix == tif->tif_nfields || |
| 241 | tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) { |
| 242 | TIFFWarning(tif->tif_name, |
| 243 | "unknown field with tag %d (0x%x) ignored", |
| 244 | dp->tdir_tag, dp->tdir_tag); |
| 245 | dp->tdir_tag = IGNORE; |
| 246 | fix = 0; /* restart search */ |
| 247 | continue; |
| 248 | } |
| 249 | /* |
| 250 | * Null out old tags that we ignore. |
| 251 | */ |
| 252 | if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) { |
| 253 | ignore: |
| 254 | dp->tdir_tag = IGNORE; |
| 255 | continue; |
| 256 | } |
| 257 | /* |
| 258 | * Check data type. |
| 259 | */ |
| 260 | fip = tif->tif_fieldinfo[fix]; |
| 261 | while (dp->tdir_type != (u_short) fip->field_type) { |
| 262 | if (fip->field_type == TIFF_ANY) /* wildcard */ |
| 263 | break; |
| 264 | fip++, fix++; |
| 265 | if (fix == tif->tif_nfields || |
| 266 | fip->field_tag != dp->tdir_tag) { |
| 267 | TIFFWarning(tif->tif_name, |
| 268 | "wrong data type %d for \"%s\"; tag ignored", |
| 269 | dp->tdir_type, fip[-1].field_name); |
| 270 | goto ignore; |
| 271 | } |
| 272 | } |
| 273 | /* |
| 274 | * Check count if known in advance. |
| 275 | */ |
| 276 | if (fip->field_readcount != TIFF_VARIABLE) { |
| 277 | uint32 expected = (fip->field_readcount == TIFF_SPP) ? |
| 278 | (uint32) td->td_samplesperpixel : |
| 279 | (uint32) fip->field_readcount; |
| 280 | if (!CheckDirCount(tif, dp, expected)) |
| 281 | goto ignore; |
| 282 | } |
| 283 | |
| 284 | switch (dp->tdir_tag) { |
| 285 | case TIFFTAG_COMPRESSION: |
| 286 | /* |
| 287 | * The 5.0 spec says the Compression tag has |
| 288 | * one value, while earlier specs say it has |
| 289 | * one value per sample. Because of this, we |
| 290 | * accept the tag if one value is supplied. |
| 291 | */ |
| 292 | if (dp->tdir_count == 1) { |
| 293 | v = TIFFExtractData(tif, |
| 294 | dp->tdir_type, dp->tdir_offset); |
| 295 | if (!TIFFSetField(tif, dp->tdir_tag, (int)v)) |
| 296 | goto bad; |
| 297 | break; |
| 298 | } |
| 299 | if (!TIFFFetchPerSampleShorts(tif, dp, &iv) || |
| 300 | !TIFFSetField(tif, dp->tdir_tag, iv)) |
| 301 | goto bad; |
| 302 | dp->tdir_tag = IGNORE; |
| 303 | break; |
| 304 | case TIFFTAG_STRIPOFFSETS: |
| 305 | case TIFFTAG_STRIPBYTECOUNTS: |
| 306 | case TIFFTAG_TILEOFFSETS: |
| 307 | case TIFFTAG_TILEBYTECOUNTS: |
| 308 | TIFFSetFieldBit(tif, fip->field_bit); |
| 309 | break; |
| 310 | case TIFFTAG_IMAGEWIDTH: |
| 311 | case TIFFTAG_IMAGELENGTH: |
| 312 | case TIFFTAG_IMAGEDEPTH: |
| 313 | case TIFFTAG_TILELENGTH: |
| 314 | case TIFFTAG_TILEWIDTH: |
| 315 | case TIFFTAG_TILEDEPTH: |
| 316 | case TIFFTAG_PLANARCONFIG: |
| 317 | case TIFFTAG_ROWSPERSTRIP: |
| 318 | if (!TIFFFetchNormalTag(tif, dp)) |
| 319 | goto bad; |
| 320 | dp->tdir_tag = IGNORE; |
| 321 | break; |
| 322 | case TIFFTAG_EXTRASAMPLES: |
| 323 | (void) TIFFFetchExtraSamples(tif, dp); |
| 324 | dp->tdir_tag = IGNORE; |
| 325 | break; |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * Allocate directory structure and setup defaults. |
| 331 | */ |
| 332 | if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) { |
| 333 | MissingRequired(tif, "ImageLength"); |
| 334 | goto bad; |
| 335 | } |
| 336 | if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) { |
| 337 | MissingRequired(tif, "PlanarConfiguration"); |
| 338 | goto bad; |
| 339 | } |
| 340 | /* |
| 341 | * Setup appropriate structures (by strip or by tile) |
| 342 | */ |
| 343 | if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) { |
| 344 | td->td_nstrips = TIFFNumberOfStrips(tif); |
| 345 | td->td_tilewidth = td->td_imagewidth; |
| 346 | td->td_tilelength = td->td_rowsperstrip; |
| 347 | td->td_tiledepth = td->td_imagedepth; |
| 348 | tif->tif_flags &= ~TIFF_ISTILED; |
| 349 | } else { |
| 350 | td->td_nstrips = TIFFNumberOfTiles(tif); |
| 351 | tif->tif_flags |= TIFF_ISTILED; |
| 352 | } |
| 353 | td->td_stripsperimage = td->td_nstrips; |
| 354 | if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
| 355 | td->td_stripsperimage /= td->td_samplesperpixel; |
| 356 | if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) { |
| 357 | MissingRequired(tif, |
| 358 | isTiled(tif) ? "TileOffsets" : "StripOffsets"); |
| 359 | goto bad; |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * Second pass: extract other information. |
| 364 | */ |
| 365 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 366 | if (dp->tdir_tag == IGNORE) |
| 367 | continue; |
| 368 | switch (dp->tdir_tag) { |
| 369 | case TIFFTAG_MINSAMPLEVALUE: |
| 370 | case TIFFTAG_MAXSAMPLEVALUE: |
| 371 | case TIFFTAG_BITSPERSAMPLE: |
| 372 | /* |
| 373 | * The 5.0 spec says the Compression tag has |
| 374 | * one value, while earlier specs say it has |
| 375 | * one value per sample. Because of this, we |
| 376 | * accept the tag if one value is supplied. |
| 377 | * |
| 378 | * The MinSampleValue, MaxSampleValue and |
| 379 | * BitsPerSample tags are supposed to be written |
| 380 | * as one value/sample, but some vendors incorrectly |
| 381 | * write one value only -- so we accept that |
| 382 | * as well (yech). |
| 383 | */ |
| 384 | if (dp->tdir_count == 1) { |
| 385 | v = TIFFExtractData(tif, |
| 386 | dp->tdir_type, dp->tdir_offset); |
| 387 | if (!TIFFSetField(tif, dp->tdir_tag, (int)v)) |
| 388 | goto bad; |
| 389 | break; |
| 390 | } |
| 391 | /* fall thru... */ |
| 392 | case TIFFTAG_DATATYPE: |
| 393 | case TIFFTAG_SAMPLEFORMAT: |
| 394 | if (!TIFFFetchPerSampleShorts(tif, dp, &iv) || |
| 395 | !TIFFSetField(tif, dp->tdir_tag, iv)) |
| 396 | goto bad; |
| 397 | break; |
| 398 | case TIFFTAG_SMINSAMPLEVALUE: |
| 399 | case TIFFTAG_SMAXSAMPLEVALUE: |
| 400 | if (!TIFFFetchPerSampleAnys(tif, dp, &dv) || |
| 401 | !TIFFSetField(tif, dp->tdir_tag, dv)) |
| 402 | goto bad; |
| 403 | break; |
| 404 | case TIFFTAG_STRIPOFFSETS: |
| 405 | case TIFFTAG_TILEOFFSETS: |
| 406 | if (!TIFFFetchStripThing(tif, dp, |
| 407 | td->td_nstrips, &td->td_stripoffset)) |
| 408 | goto bad; |
| 409 | break; |
| 410 | case TIFFTAG_STRIPBYTECOUNTS: |
| 411 | case TIFFTAG_TILEBYTECOUNTS: |
| 412 | if (!TIFFFetchStripThing(tif, dp, |
| 413 | td->td_nstrips, &td->td_stripbytecount)) |
| 414 | goto bad; |
| 415 | break; |
| 416 | case TIFFTAG_COLORMAP: |
| 417 | case TIFFTAG_TRANSFERFUNCTION: |
| 418 | /* |
| 419 | * TransferFunction can have either 1x or 3x data |
| 420 | * values; Colormap can have only 3x items. |
| 421 | */ |
| 422 | v = 1L<<td->td_bitspersample; |
| 423 | if (dp->tdir_tag == TIFFTAG_COLORMAP || |
| 424 | dp->tdir_count != (uint32) v) { |
| 425 | if (!CheckDirCount(tif, dp, (uint32)(3*v))) |
| 426 | break; |
| 427 | } |
| 428 | v *= sizeof (uint16); |
| 429 | cp = CheckMalloc(tif, dp->tdir_count * sizeof (uint16), |
| 430 | "to read \"TransferFunction\" tag"); |
| 431 | if (cp != NULL) { |
| 432 | if (TIFFFetchData(tif, dp, cp)) { |
| 433 | /* |
| 434 | * This deals with there being only |
| 435 | * one array to apply to all samples. |
| 436 | */ |
| 437 | uint32 c = |
| 438 | (uint32)1 << td->td_bitspersample; |
| 439 | if (dp->tdir_count == c) |
| 440 | v = 0; |
| 441 | TIFFSetField(tif, dp->tdir_tag, |
| 442 | cp, cp+v, cp+2*v); |
| 443 | } |
| 444 | _TIFFfree(cp); |
| 445 | } |
| 446 | break; |
| 447 | case TIFFTAG_PAGENUMBER: |
| 448 | case TIFFTAG_HALFTONEHINTS: |
| 449 | case TIFFTAG_YCBCRSUBSAMPLING: |
| 450 | case TIFFTAG_DOTRANGE: |
| 451 | (void) TIFFFetchShortPair(tif, dp); |
| 452 | break; |
| 453 | #ifdef COLORIMETRY_SUPPORT |
| 454 | case TIFFTAG_REFERENCEBLACKWHITE: |
| 455 | (void) TIFFFetchRefBlackWhite(tif, dp); |
| 456 | break; |
| 457 | #endif |
| 458 | /* BEGIN REV 4.0 COMPATIBILITY */ |
| 459 | case TIFFTAG_OSUBFILETYPE: |
| 460 | v = 0; |
| 461 | switch (TIFFExtractData(tif, dp->tdir_type, |
| 462 | dp->tdir_offset)) { |
| 463 | case OFILETYPE_REDUCEDIMAGE: |
| 464 | v = FILETYPE_REDUCEDIMAGE; |
| 465 | break; |
| 466 | case OFILETYPE_PAGE: |
| 467 | v = FILETYPE_PAGE; |
| 468 | break; |
| 469 | } |
| 470 | if (v) |
| 471 | (void) TIFFSetField(tif, |
| 472 | TIFFTAG_SUBFILETYPE, (int)v); |
| 473 | break; |
| 474 | /* END REV 4.0 COMPATIBILITY */ |
| 475 | default: |
| 476 | (void) TIFFFetchNormalTag(tif, dp); |
| 477 | break; |
| 478 | } |
| 479 | } |
| 480 | /* |
| 481 | * Verify Palette image has a Colormap. |
| 482 | */ |
| 483 | if (td->td_photometric == PHOTOMETRIC_PALETTE && |
| 484 | !TIFFFieldSet(tif, FIELD_COLORMAP)) { |
| 485 | MissingRequired(tif, "Colormap"); |
| 486 | goto bad; |
| 487 | } |
| 488 | /* |
| 489 | * Attempt to deal with a missing StripByteCounts tag. |
| 490 | */ |
| 491 | if (!TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) { |
| 492 | /* |
| 493 | * Some manufacturers violate the spec by not giving |
| 494 | * the size of the strips. In this case, assume there |
| 495 | * is one uncompressed strip of data. |
| 496 | */ |
| 497 | if ((td->td_planarconfig == PLANARCONFIG_CONTIG && |
| 498 | td->td_nstrips > 1) || |
| 499 | (td->td_planarconfig == PLANARCONFIG_SEPARATE && |
| 500 | td->td_nstrips != td->td_samplesperpixel)) { |
| 501 | MissingRequired(tif, "StripByteCounts"); |
| 502 | goto bad; |
| 503 | } |
| 504 | TIFFWarning(tif->tif_name, |
| 505 | "TIFF directory is missing required \"%s\" field, calculating from imagelength", |
| 506 | _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); |
| 507 | EstimateStripByteCounts(tif, dir, dircount); |
| 508 | #define BYTECOUNTLOOKSBAD \ |
| 509 | (td->td_stripbytecount[0] == 0 || \ |
| 510 | (td->td_compression == COMPRESSION_NONE && \ |
| 511 | td->td_stripbytecount[0] > TIFFGetFileSize(tif) - td->td_stripoffset[0])) |
| 512 | } else if (td->td_nstrips == 1 && BYTECOUNTLOOKSBAD) { |
| 513 | /* |
| 514 | * Plexus (and others) sometimes give a value |
| 515 | * of zero for a tag when they don't know what |
| 516 | * the correct value is! Try and handle the |
| 517 | * simple case of estimating the size of a one |
| 518 | * strip image. |
| 519 | */ |
| 520 | TIFFWarning(tif->tif_name, |
| 521 | "Bogus \"%s\" field, ignoring and calculating from imagelength", |
| 522 | _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); |
| 523 | EstimateStripByteCounts(tif, dir, dircount); |
| 524 | } |
| 525 | if (dir) |
| 526 | _TIFFfree((char *)dir); |
| 527 | if (!TIFFFieldSet(tif, FIELD_MAXSAMPLEVALUE)) |
| 528 | td->td_maxsamplevalue = (uint16)((1L<<td->td_bitspersample)-1); |
| 529 | /* |
| 530 | * Setup default compression scheme. |
| 531 | */ |
| 532 | if (!TIFFFieldSet(tif, FIELD_COMPRESSION)) |
| 533 | TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE); |
| 534 | /* |
| 535 | * Some manufacturers make life difficult by writing |
| 536 | * large amounts of uncompressed data as a single strip. |
| 537 | * This is contrary to the recommendations of the spec. |
| 538 | * The following makes an attempt at breaking such images |
| 539 | * into strips closer to the recommended 8k bytes. A |
| 540 | * side effect, however, is that the RowsPerStrip tag |
| 541 | * value may be changed. |
| 542 | */ |
| 543 | if (td->td_nstrips == 1 && td->td_compression == COMPRESSION_NONE && |
| 544 | (tif->tif_flags & (TIFF_STRIPCHOP|TIFF_ISTILED)) == TIFF_STRIPCHOP) |
| 545 | ChopUpSingleUncompressedStrip(tif); |
| 546 | /* |
| 547 | * Reinitialize i/o since we are starting on a new directory. |
| 548 | */ |
| 549 | tif->tif_row = (uint32) -1; |
| 550 | tif->tif_curstrip = (tstrip_t) -1; |
| 551 | tif->tif_col = (uint32) -1; |
| 552 | tif->tif_curtile = (ttile_t) -1; |
| 553 | tif->tif_tilesize = TIFFTileSize(tif); |
| 554 | tif->tif_scanlinesize = TIFFScanlineSize(tif); |
| 555 | return (1); |
| 556 | bad: |
| 557 | if (dir) |
| 558 | _TIFFfree(dir); |
| 559 | return (0); |
| 560 | } |
| 561 | |
| 562 | static void |
| 563 | EstimateStripByteCounts(TIFF* tif, TIFFDirEntry* dir, uint16 dircount) |
| 564 | { |
| 565 | register TIFFDirEntry *dp; |
| 566 | register TIFFDirectory *td = &tif->tif_dir; |
| 567 | uint16 i; |
| 568 | |
| 569 | if (td->td_stripbytecount) |
| 570 | _TIFFfree(td->td_stripbytecount); |
| 571 | td->td_stripbytecount = (uint32*) |
| 572 | CheckMalloc(tif, td->td_nstrips * sizeof (uint32), |
| 573 | "for \"StripByteCounts\" array"); |
| 574 | if (td->td_compression != COMPRESSION_NONE) { |
| 575 | uint32 space = (uint32)(sizeof (TIFFHeader) |
| 576 | + sizeof (uint16) |
| 577 | + (dircount * sizeof (TIFFDirEntry)) |
| 578 | + sizeof (uint32)); |
| 579 | toff_t filesize = TIFFGetFileSize(tif); |
| 580 | uint16 n; |
| 581 | |
| 582 | /* calculate amount of space used by indirect values */ |
| 583 | for (dp = dir, n = dircount; n > 0; n--, dp++) { |
| 584 | uint32 cc = dp->tdir_count*tiffDataWidth[dp->tdir_type]; |
| 585 | if (cc > sizeof (uint32)) |
| 586 | space += cc; |
| 587 | } |
| 588 | space = filesize - space; |
| 589 | if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
| 590 | space /= td->td_samplesperpixel; |
| 591 | for (i = 0; i < td->td_nstrips; i++) |
| 592 | td->td_stripbytecount[i] = space; |
| 593 | /* |
| 594 | * This gross hack handles the case were the offset to |
| 595 | * the last strip is past the place where we think the strip |
| 596 | * should begin. Since a strip of data must be contiguous, |
| 597 | * it's safe to assume that we've overestimated the amount |
| 598 | * of data in the strip and trim this number back accordingly. |
| 599 | */ |
| 600 | i--; |
| 601 | if (td->td_stripoffset[i] + td->td_stripbytecount[i] > filesize) |
| 602 | td->td_stripbytecount[i] = |
| 603 | filesize - td->td_stripoffset[i]; |
| 604 | } else { |
| 605 | uint32 rowbytes = TIFFScanlineSize(tif); |
| 606 | uint32 rowsperstrip = td->td_imagelength/td->td_stripsperimage; |
| 607 | for (i = 0; i < td->td_nstrips; i++) |
| 608 | td->td_stripbytecount[i] = rowbytes*rowsperstrip; |
| 609 | } |
| 610 | TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); |
| 611 | if (!TIFFFieldSet(tif, FIELD_ROWSPERSTRIP)) |
| 612 | td->td_rowsperstrip = td->td_imagelength; |
| 613 | } |
| 614 | |
| 615 | static void |
| 616 | MissingRequired(TIFF* tif, const char* tagname) |
| 617 | { |
| 618 | TIFFError(tif->tif_name, |
| 619 | "TIFF directory is missing required \"%s\" field", tagname); |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * Check the count field of a directory |
| 624 | * entry against a known value. The caller |
| 625 | * is expected to skip/ignore the tag if |
| 626 | * there is a mismatch. |
| 627 | */ |
| 628 | static int |
| 629 | CheckDirCount(TIFF* tif, TIFFDirEntry* dir, uint32 count) |
| 630 | { |
| 631 | if (count != dir->tdir_count) { |
| 632 | TIFFWarning(tif->tif_name, |
| 633 | "incorrect count for field \"%s\" (%lu, expecting %lu); tag ignored", |
| 634 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, |
| 635 | dir->tdir_count, count); |
| 636 | return (0); |
| 637 | } |
| 638 | return (1); |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Fetch a contiguous directory item. |
| 643 | */ |
| 644 | static tsize_t |
| 645 | TIFFFetchData(TIFF* tif, TIFFDirEntry* dir, char* cp) |
| 646 | { |
| 647 | int w = tiffDataWidth[dir->tdir_type]; |
| 648 | tsize_t cc = dir->tdir_count * w; |
| 649 | |
| 650 | if (!isMapped(tif)) { |
| 651 | if (!SeekOK(tif, dir->tdir_offset)) |
| 652 | goto bad; |
| 653 | if (!ReadOK(tif, cp, cc)) |
| 654 | goto bad; |
| 655 | } else { |
| 656 | if (dir->tdir_offset + cc > tif->tif_size) |
| 657 | goto bad; |
| 658 | _TIFFmemcpy(cp, tif->tif_base + dir->tdir_offset, cc); |
| 659 | } |
| 660 | if (tif->tif_flags & TIFF_SWAB) { |
| 661 | switch (dir->tdir_type) { |
| 662 | case TIFF_SHORT: |
| 663 | case TIFF_SSHORT: |
| 664 | TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count); |
| 665 | break; |
| 666 | case TIFF_LONG: |
| 667 | case TIFF_SLONG: |
| 668 | case TIFF_FLOAT: |
| 669 | TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count); |
| 670 | break; |
| 671 | case TIFF_RATIONAL: |
| 672 | case TIFF_SRATIONAL: |
| 673 | TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count); |
| 674 | break; |
| 675 | case TIFF_DOUBLE: |
| 676 | TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count); |
| 677 | break; |
| 678 | } |
| 679 | } |
| 680 | return (cc); |
| 681 | bad: |
| 682 | TIFFError(tif->tif_name, "Error fetching data for field \"%s\"", |
| 683 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 684 | return ((tsize_t) 0); |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * Fetch an ASCII item from the file. |
| 689 | */ |
| 690 | static tsize_t |
| 691 | TIFFFetchString(TIFF* tif, TIFFDirEntry* dir, char* cp) |
| 692 | { |
| 693 | if (dir->tdir_count <= 4) { |
| 694 | uint32 l = dir->tdir_offset; |
| 695 | if (tif->tif_flags & TIFF_SWAB) |
| 696 | TIFFSwabLong(&l); |
| 697 | _TIFFmemcpy(cp, &l, dir->tdir_count); |
| 698 | return (1); |
| 699 | } |
| 700 | return (TIFFFetchData(tif, dir, cp)); |
| 701 | } |
| 702 | |
| 703 | /* |
| 704 | * Convert numerator+denominator to float. |
| 705 | */ |
| 706 | static int |
| 707 | cvtRational(TIFF* tif, TIFFDirEntry* dir, uint32 num, uint32 denom, float* rv) |
| 708 | { |
| 709 | if (denom == 0) { |
| 710 | TIFFError(tif->tif_name, |
| 711 | "%s: Rational with zero denominator (num = %lu)", |
| 712 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, num); |
| 713 | return (0); |
| 714 | } else { |
| 715 | if (dir->tdir_type == TIFF_RATIONAL) |
| 716 | *rv = ((float)num / (float)denom); |
| 717 | else |
| 718 | *rv = ((float)(int32)num / (float)(int32)denom); |
| 719 | return (1); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /* |
| 724 | * Fetch a rational item from the file |
| 725 | * at offset off and return the value |
| 726 | * as a floating point number. |
| 727 | */ |
| 728 | static float |
| 729 | TIFFFetchRational(TIFF* tif, TIFFDirEntry* dir) |
| 730 | { |
| 731 | uint32 l[2]; |
| 732 | float v; |
| 733 | |
| 734 | return (!TIFFFetchData(tif, dir, (char *)l) || |
| 735 | !cvtRational(tif, dir, l[0], l[1], &v) ? 1.0f : v); |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Fetch a single floating point value |
| 740 | * from the offset field and return it |
| 741 | * as a native float. |
| 742 | */ |
| 743 | static float |
| 744 | TIFFFetchFloat(TIFF* tif, TIFFDirEntry* dir) |
| 745 | { |
| 746 | long l = TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset); |
| 747 | float v = *(float*) &l; |
| 748 | TIFFCvtIEEEFloatToNative(tif, 1, &v); |
| 749 | return (v); |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * Fetch an array of BYTE or SBYTE values. |
| 754 | */ |
| 755 | static int |
| 756 | TIFFFetchByteArray(TIFF* tif, TIFFDirEntry* dir, uint16* v) |
| 757 | { |
| 758 | if (dir->tdir_count <= 4) { |
| 759 | /* |
| 760 | * Extract data from offset field. |
| 761 | */ |
| 762 | if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { |
| 763 | switch (dir->tdir_count) { |
| 764 | case 4: v[3] = dir->tdir_offset & 0xff; |
| 765 | case 3: v[2] = (dir->tdir_offset >> 8) & 0xff; |
| 766 | case 2: v[1] = (dir->tdir_offset >> 16) & 0xff; |
| 767 | case 1: v[0] = dir->tdir_offset >> 24; |
| 768 | } |
| 769 | } else { |
| 770 | switch (dir->tdir_count) { |
| 771 | case 4: v[3] = dir->tdir_offset >> 24; |
| 772 | case 3: v[2] = (dir->tdir_offset >> 16) & 0xff; |
| 773 | case 2: v[1] = (dir->tdir_offset >> 8) & 0xff; |
| 774 | case 1: v[0] = dir->tdir_offset & 0xff; |
| 775 | } |
| 776 | } |
| 777 | return (1); |
| 778 | } else |
| 779 | return (TIFFFetchData(tif, dir, (char*) v) != 0); /* XXX */ |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * Fetch an array of SHORT or SSHORT values. |
| 784 | */ |
| 785 | static int |
| 786 | TIFFFetchShortArray(TIFF* tif, TIFFDirEntry* dir, uint16* v) |
| 787 | { |
| 788 | if (dir->tdir_count <= 2) { |
| 789 | if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { |
| 790 | switch (dir->tdir_count) { |
| 791 | case 2: v[1] = dir->tdir_offset & 0xffff; |
| 792 | case 1: v[0] = dir->tdir_offset >> 16; |
| 793 | } |
| 794 | } else { |
| 795 | switch (dir->tdir_count) { |
| 796 | case 2: v[1] = dir->tdir_offset >> 16; |
| 797 | case 1: v[0] = dir->tdir_offset & 0xffff; |
| 798 | } |
| 799 | } |
| 800 | return (1); |
| 801 | } else |
| 802 | return (TIFFFetchData(tif, dir, (char *)v) != 0); |
| 803 | } |
| 804 | |
| 805 | /* |
| 806 | * Fetch a pair of SHORT or BYTE values. |
| 807 | */ |
| 808 | static int |
| 809 | TIFFFetchShortPair(TIFF* tif, TIFFDirEntry* dir) |
| 810 | { |
| 811 | uint16 v[2]; |
| 812 | int ok = 0; |
| 813 | |
| 814 | switch (dir->tdir_type) { |
| 815 | case TIFF_SHORT: |
| 816 | case TIFF_SSHORT: |
| 817 | ok = TIFFFetchShortArray(tif, dir, v); |
| 818 | break; |
| 819 | case TIFF_BYTE: |
| 820 | case TIFF_SBYTE: |
| 821 | ok = TIFFFetchByteArray(tif, dir, v); |
| 822 | break; |
| 823 | } |
| 824 | if (ok) |
| 825 | TIFFSetField(tif, dir->tdir_tag, v[0], v[1]); |
| 826 | return (ok); |
| 827 | } |
| 828 | |
| 829 | /* |
| 830 | * Fetch an array of LONG or SLONG values. |
| 831 | */ |
| 832 | static int |
| 833 | TIFFFetchLongArray(TIFF* tif, TIFFDirEntry* dir, uint32* v) |
| 834 | { |
| 835 | if (dir->tdir_count == 1) { |
| 836 | v[0] = dir->tdir_offset; |
| 837 | return (1); |
| 838 | } else |
| 839 | return (TIFFFetchData(tif, dir, (char*) v) != 0); |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * Fetch an array of RATIONAL or SRATIONAL values. |
| 844 | */ |
| 845 | static int |
| 846 | TIFFFetchRationalArray(TIFF* tif, TIFFDirEntry* dir, float* v) |
| 847 | { |
| 848 | int ok = 0; |
| 849 | uint32* l; |
| 850 | |
| 851 | l = (uint32*)CheckMalloc(tif, |
| 852 | dir->tdir_count*tiffDataWidth[dir->tdir_type], |
| 853 | "to fetch array of rationals"); |
| 854 | if (l) { |
| 855 | if (TIFFFetchData(tif, dir, (char *)l)) { |
| 856 | uint32 i; |
| 857 | for (i = 0; i < dir->tdir_count; i++) { |
| 858 | ok = cvtRational(tif, dir, |
| 859 | l[2*i+0], l[2*i+1], &v[i]); |
| 860 | if (!ok) |
| 861 | break; |
| 862 | } |
| 863 | } |
| 864 | _TIFFfree((char *)l); |
| 865 | } |
| 866 | return (ok); |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * Fetch an array of FLOAT values. |
| 871 | */ |
| 872 | static int |
| 873 | TIFFFetchFloatArray(TIFF* tif, TIFFDirEntry* dir, float* v) |
| 874 | { |
| 875 | |
| 876 | if (dir->tdir_count == 1) { |
| 877 | v[0] = *(float*) &dir->tdir_offset; |
| 878 | TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v); |
| 879 | return (1); |
| 880 | } else if (TIFFFetchData(tif, dir, (char*) v)) { |
| 881 | TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v); |
| 882 | return (1); |
| 883 | } else |
| 884 | return (0); |
| 885 | } |
| 886 | |
| 887 | /* |
| 888 | * Fetch an array of DOUBLE values. |
| 889 | */ |
| 890 | static int |
| 891 | TIFFFetchDoubleArray(TIFF* tif, TIFFDirEntry* dir, double* v) |
| 892 | { |
| 893 | if (TIFFFetchData(tif, dir, (char*) v)) { |
| 894 | TIFFCvtIEEEDoubleToNative(tif, dir->tdir_count, v); |
| 895 | return (1); |
| 896 | } else |
| 897 | return (0); |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | * Fetch an array of ANY values. The actual values are |
| 902 | * returned as doubles which should be able hold all the |
| 903 | * types. Yes, there really should be an tany_t to avoid |
| 904 | * this potential non-portability ... Note in particular |
| 905 | * that we assume that the double return value vector is |
| 906 | * large enough to read in any fundamental type. We use |
| 907 | * that vector as a buffer to read in the base type vector |
| 908 | * and then convert it in place to double (from end |
| 909 | * to front of course). |
| 910 | */ |
| 911 | static int |
| 912 | TIFFFetchAnyArray(TIFF* tif, TIFFDirEntry* dir, double* v) |
| 913 | { |
| 914 | int i; |
| 915 | |
| 916 | switch (dir->tdir_type) { |
| 917 | case TIFF_BYTE: |
| 918 | case TIFF_SBYTE: |
| 919 | if (!TIFFFetchByteArray(tif, dir, (uint16*) v)) |
| 920 | return (0); |
| 921 | if (dir->tdir_type == TIFF_BYTE) { |
| 922 | uint16* vp = (uint16*) v; |
| 923 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 924 | v[i] = vp[i]; |
| 925 | } else { |
| 926 | int16* vp = (int16*) v; |
| 927 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 928 | v[i] = vp[i]; |
| 929 | } |
| 930 | break; |
| 931 | case TIFF_SHORT: |
| 932 | case TIFF_SSHORT: |
| 933 | if (!TIFFFetchShortArray(tif, dir, (uint16*) v)) |
| 934 | return (0); |
| 935 | if (dir->tdir_type == TIFF_SHORT) { |
| 936 | uint16* vp = (uint16*) v; |
| 937 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 938 | v[i] = vp[i]; |
| 939 | } else { |
| 940 | int16* vp = (int16*) v; |
| 941 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 942 | v[i] = vp[i]; |
| 943 | } |
| 944 | break; |
| 945 | case TIFF_LONG: |
| 946 | case TIFF_SLONG: |
| 947 | if (!TIFFFetchLongArray(tif, dir, (uint32*) v)) |
| 948 | return (0); |
| 949 | if (dir->tdir_type == TIFF_LONG) { |
| 950 | uint32* vp = (uint32*) v; |
| 951 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 952 | v[i] = vp[i]; |
| 953 | } else { |
| 954 | int32* vp = (int32*) v; |
| 955 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 956 | v[i] = vp[i]; |
| 957 | } |
| 958 | break; |
| 959 | case TIFF_RATIONAL: |
| 960 | case TIFF_SRATIONAL: |
| 961 | if (!TIFFFetchRationalArray(tif, dir, (float*) v)) |
| 962 | return (0); |
| 963 | { float* vp = (float*) v; |
| 964 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 965 | v[i] = vp[i]; |
| 966 | } |
| 967 | break; |
| 968 | case TIFF_FLOAT: |
| 969 | if (!TIFFFetchFloatArray(tif, dir, (float*) v)) |
| 970 | return (0); |
| 971 | { float* vp = (float*) v; |
| 972 | for (i = dir->tdir_count-1; i >= 0; i--) |
| 973 | v[i] = vp[i]; |
| 974 | } |
| 975 | break; |
| 976 | case TIFF_DOUBLE: |
| 977 | return (TIFFFetchDoubleArray(tif, dir, (double*) v)); |
| 978 | default: |
| 979 | /* TIFF_NOTYPE */ |
| 980 | /* TIFF_ASCII */ |
| 981 | /* TIFF_UNDEFINED */ |
| 982 | TIFFError(tif->tif_name, |
| 983 | "Cannot read TIFF_ANY type %d for field \"%s\"", |
| 984 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 985 | return (0); |
| 986 | } |
| 987 | return (1); |
| 988 | } |
| 989 | |
| 990 | /* |
| 991 | * Fetch a tag that is not handled by special case code. |
| 992 | */ |
| 993 | static int |
| 994 | TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp) |
| 995 | { |
| 996 | static const char mesg[] = "to fetch tag value"; |
| 997 | int ok = 0; |
| 998 | const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dp->tdir_tag); |
| 999 | |
| 1000 | if (dp->tdir_count > 1) { /* array of values */ |
| 1001 | char* cp = NULL; |
| 1002 | |
| 1003 | switch (dp->tdir_type) { |
| 1004 | case TIFF_BYTE: |
| 1005 | case TIFF_SBYTE: |
| 1006 | /* NB: always expand BYTE values to shorts */ |
| 1007 | cp = CheckMalloc(tif, |
| 1008 | dp->tdir_count * sizeof (uint16), mesg); |
| 1009 | ok = cp && TIFFFetchByteArray(tif, dp, (uint16*) cp); |
| 1010 | break; |
| 1011 | case TIFF_SHORT: |
| 1012 | case TIFF_SSHORT: |
| 1013 | cp = CheckMalloc(tif, |
| 1014 | dp->tdir_count * sizeof (uint16), mesg); |
| 1015 | ok = cp && TIFFFetchShortArray(tif, dp, (uint16*) cp); |
| 1016 | break; |
| 1017 | case TIFF_LONG: |
| 1018 | case TIFF_SLONG: |
| 1019 | cp = CheckMalloc(tif, |
| 1020 | dp->tdir_count * sizeof (uint32), mesg); |
| 1021 | ok = cp && TIFFFetchLongArray(tif, dp, (uint32*) cp); |
| 1022 | break; |
| 1023 | case TIFF_RATIONAL: |
| 1024 | case TIFF_SRATIONAL: |
| 1025 | cp = CheckMalloc(tif, |
| 1026 | dp->tdir_count * sizeof (float), mesg); |
| 1027 | ok = cp && TIFFFetchRationalArray(tif, dp, (float*) cp); |
| 1028 | break; |
| 1029 | case TIFF_FLOAT: |
| 1030 | cp = CheckMalloc(tif, |
| 1031 | dp->tdir_count * sizeof (float), mesg); |
| 1032 | ok = cp && TIFFFetchFloatArray(tif, dp, (float*) cp); |
| 1033 | break; |
| 1034 | case TIFF_DOUBLE: |
| 1035 | cp = CheckMalloc(tif, |
| 1036 | dp->tdir_count * sizeof (double), mesg); |
| 1037 | ok = cp && TIFFFetchDoubleArray(tif, dp, (double*) cp); |
| 1038 | break; |
| 1039 | case TIFF_ASCII: |
| 1040 | case TIFF_UNDEFINED: /* bit of a cheat... */ |
| 1041 | /* |
| 1042 | * Some vendors write strings w/o the trailing |
| 1043 | * NULL byte, so always append one just in case. |
| 1044 | */ |
| 1045 | cp = CheckMalloc(tif, dp->tdir_count+1, mesg); |
| 1046 | if( (ok = (cp && TIFFFetchString(tif, dp, cp))) != 0 ) |
| 1047 | cp[dp->tdir_count] = '\0'; /* XXX */ |
| 1048 | break; |
| 1049 | } |
| 1050 | if (ok) { |
| 1051 | ok = (fip->field_passcount ? |
| 1052 | TIFFSetField(tif, dp->tdir_tag, dp->tdir_count, cp) |
| 1053 | : TIFFSetField(tif, dp->tdir_tag, cp)); |
| 1054 | } |
| 1055 | if (cp != NULL) |
| 1056 | _TIFFfree(cp); |
| 1057 | } else if (CheckDirCount(tif, dp, 1)) { /* singleton value */ |
| 1058 | switch (dp->tdir_type) { |
| 1059 | case TIFF_BYTE: |
| 1060 | case TIFF_SBYTE: |
| 1061 | case TIFF_SHORT: |
| 1062 | case TIFF_SSHORT: |
| 1063 | /* |
| 1064 | * If the tag is also acceptable as a LONG or SLONG |
| 1065 | * then TIFFSetField will expect an uint32 parameter |
| 1066 | * passed to it (through varargs). Thus, for machines |
| 1067 | * where sizeof (int) != sizeof (uint32) we must do |
| 1068 | * a careful check here. It's hard to say if this |
| 1069 | * is worth optimizing. |
| 1070 | * |
| 1071 | * NB: We use TIFFFieldWithTag here knowing that |
| 1072 | * it returns us the first entry in the table |
| 1073 | * for the tag and that that entry is for the |
| 1074 | * widest potential data type the tag may have. |
| 1075 | */ |
| 1076 | { TIFFDataType type = fip->field_type; |
| 1077 | if (type != TIFF_LONG && type != TIFF_SLONG) { |
| 1078 | uint16 v = (uint16) |
| 1079 | TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset); |
| 1080 | ok = (fip->field_passcount ? |
| 1081 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1082 | : TIFFSetField(tif, dp->tdir_tag, v)); |
| 1083 | break; |
| 1084 | } |
| 1085 | } |
| 1086 | /* fall thru... */ |
| 1087 | case TIFF_LONG: |
| 1088 | case TIFF_SLONG: |
| 1089 | { uint32 v32 = |
| 1090 | TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset); |
| 1091 | ok = (fip->field_passcount ? |
| 1092 | TIFFSetField(tif, dp->tdir_tag, 1, &v32) |
| 1093 | : TIFFSetField(tif, dp->tdir_tag, v32)); |
| 1094 | } |
| 1095 | break; |
| 1096 | case TIFF_RATIONAL: |
| 1097 | case TIFF_SRATIONAL: |
| 1098 | case TIFF_FLOAT: |
| 1099 | { float v = (dp->tdir_type == TIFF_FLOAT ? |
| 1100 | TIFFFetchFloat(tif, dp) |
| 1101 | : TIFFFetchRational(tif, dp)); |
| 1102 | ok = (fip->field_passcount ? |
| 1103 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1104 | : TIFFSetField(tif, dp->tdir_tag, v)); |
| 1105 | } |
| 1106 | break; |
| 1107 | case TIFF_DOUBLE: |
| 1108 | { double v; |
| 1109 | ok = (TIFFFetchDoubleArray(tif, dp, &v) && |
| 1110 | (fip->field_passcount ? |
| 1111 | TIFFSetField(tif, dp->tdir_tag, 1, &v) |
| 1112 | : TIFFSetField(tif, dp->tdir_tag, v)) |
| 1113 | ); |
| 1114 | } |
| 1115 | break; |
| 1116 | case TIFF_ASCII: |
| 1117 | case TIFF_UNDEFINED: /* bit of a cheat... */ |
| 1118 | { char c[2]; |
| 1119 | if( (ok = (TIFFFetchString(tif, dp, c) != 0)) != 0 ){ |
| 1120 | c[1] = '\0'; /* XXX paranoid */ |
| 1121 | ok = TIFFSetField(tif, dp->tdir_tag, c); |
| 1122 | } |
| 1123 | } |
| 1124 | break; |
| 1125 | } |
| 1126 | } |
| 1127 | return (ok); |
| 1128 | } |
| 1129 | |
| 1130 | #define NITEMS(x) (sizeof (x) / sizeof (x[0])) |
| 1131 | /* |
| 1132 | * Fetch samples/pixel short values for |
| 1133 | * the specified tag and verify that |
| 1134 | * all values are the same. |
| 1135 | */ |
| 1136 | static int |
| 1137 | TIFFFetchPerSampleShorts(TIFF* tif, TIFFDirEntry* dir, int* pl) |
| 1138 | { |
| 1139 | int samples = tif->tif_dir.td_samplesperpixel; |
| 1140 | int status = 0; |
| 1141 | |
| 1142 | if (CheckDirCount(tif, dir, (uint32) samples)) { |
| 1143 | uint16 buf[10]; |
| 1144 | uint16* v = buf; |
| 1145 | |
| 1146 | if (samples > NITEMS(buf)) |
| 1147 | v = (uint16*) _TIFFmalloc(samples * sizeof (uint16)); |
| 1148 | if (TIFFFetchShortArray(tif, dir, v)) { |
| 1149 | int i; |
| 1150 | for (i = 1; i < samples; i++) |
| 1151 | if (v[i] != v[0]) { |
| 1152 | TIFFError(tif->tif_name, |
| 1153 | "Cannot handle different per-sample values for field \"%s\"", |
| 1154 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1155 | goto bad; |
| 1156 | } |
| 1157 | *pl = v[0]; |
| 1158 | status = 1; |
| 1159 | } |
| 1160 | bad: |
| 1161 | if (v != buf) |
| 1162 | _TIFFfree((char*) v); |
| 1163 | } |
| 1164 | return (status); |
| 1165 | } |
| 1166 | |
| 1167 | /* |
| 1168 | * Fetch samples/pixel ANY values for |
| 1169 | * the specified tag and verify that |
| 1170 | * all values are the same. |
| 1171 | */ |
| 1172 | static int |
| 1173 | TIFFFetchPerSampleAnys(TIFF* tif, TIFFDirEntry* dir, double* pl) |
| 1174 | { |
| 1175 | int samples = (int) tif->tif_dir.td_samplesperpixel; |
| 1176 | int status = 0; |
| 1177 | |
| 1178 | if (CheckDirCount(tif, dir, (uint32) samples)) { |
| 1179 | double buf[10]; |
| 1180 | double* v = buf; |
| 1181 | |
| 1182 | if (samples > NITEMS(buf)) |
| 1183 | v = (double*) _TIFFmalloc(samples * sizeof (double)); |
| 1184 | if (TIFFFetchAnyArray(tif, dir, v)) { |
| 1185 | int i; |
| 1186 | for (i = 1; i < samples; i++) |
| 1187 | if (v[i] != v[0]) { |
| 1188 | TIFFError(tif->tif_name, |
| 1189 | "Cannot handle different per-sample values for field \"%s\"", |
| 1190 | _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); |
| 1191 | goto bad; |
| 1192 | } |
| 1193 | *pl = v[0]; |
| 1194 | status = 1; |
| 1195 | } |
| 1196 | bad: |
| 1197 | if (v != buf) |
| 1198 | _TIFFfree(v); |
| 1199 | } |
| 1200 | return (status); |
| 1201 | } |
| 1202 | #undef NITEMS |
| 1203 | |
| 1204 | /* |
| 1205 | * Fetch a set of offsets or lengths. |
| 1206 | * While this routine says "strips", |
| 1207 | * in fact it's also used for tiles. |
| 1208 | */ |
| 1209 | static int |
| 1210 | TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, long nstrips, uint32** lpp) |
| 1211 | { |
| 1212 | register uint32* lp; |
| 1213 | int status; |
| 1214 | |
| 1215 | if (!CheckDirCount(tif, dir, (uint32) nstrips)) |
| 1216 | return (0); |
| 1217 | /* |
| 1218 | * Allocate space for strip information. |
| 1219 | */ |
| 1220 | if (*lpp == NULL && |
| 1221 | (*lpp = (uint32 *)CheckMalloc(tif, |
| 1222 | nstrips * sizeof (uint32), "for strip array")) == NULL) |
| 1223 | return (0); |
| 1224 | lp = *lpp; |
| 1225 | if (dir->tdir_type == (int)TIFF_SHORT) { |
| 1226 | /* |
| 1227 | * Handle uint16->uint32 expansion. |
| 1228 | */ |
| 1229 | uint16* dp = (uint16*) CheckMalloc(tif, |
| 1230 | dir->tdir_count* sizeof (uint16), "to fetch strip tag"); |
| 1231 | if (dp == NULL) |
| 1232 | return (0); |
| 1233 | if( (status = TIFFFetchShortArray(tif, dir, dp)) != 0 ) { |
| 1234 | register uint16* wp = dp; |
| 1235 | while (nstrips-- > 0) |
| 1236 | *lp++ = *wp++; |
| 1237 | } |
| 1238 | _TIFFfree((char*) dp); |
| 1239 | } else |
| 1240 | status = TIFFFetchLongArray(tif, dir, lp); |
| 1241 | return (status); |
| 1242 | } |
| 1243 | |
| 1244 | #define NITEMS(x) (sizeof (x) / sizeof (x[0])) |
| 1245 | /* |
| 1246 | * Fetch and set the ExtraSamples tag. |
| 1247 | */ |
| 1248 | static int |
| 1249 | TIFFFetchExtraSamples(TIFF* tif, TIFFDirEntry* dir) |
| 1250 | { |
| 1251 | uint16 buf[10]; |
| 1252 | uint16* v = buf; |
| 1253 | int status; |
| 1254 | |
| 1255 | if (dir->tdir_count > NITEMS(buf)) |
| 1256 | v = (uint16*) _TIFFmalloc(dir->tdir_count * sizeof (uint16)); |
| 1257 | if (dir->tdir_type == TIFF_BYTE) |
| 1258 | status = TIFFFetchByteArray(tif, dir, v); |
| 1259 | else |
| 1260 | status = TIFFFetchShortArray(tif, dir, v); |
| 1261 | if (status) |
| 1262 | status = TIFFSetField(tif, dir->tdir_tag, dir->tdir_count, v); |
| 1263 | if (v != buf) |
| 1264 | _TIFFfree((char*) v); |
| 1265 | return (status); |
| 1266 | } |
| 1267 | #undef NITEMS |
| 1268 | |
| 1269 | #ifdef COLORIMETRY_SUPPORT |
| 1270 | /* |
| 1271 | * Fetch and set the RefBlackWhite tag. |
| 1272 | */ |
| 1273 | static int |
| 1274 | TIFFFetchRefBlackWhite(TIFF* tif, TIFFDirEntry* dir) |
| 1275 | { |
| 1276 | static const char mesg[] = "for \"ReferenceBlackWhite\" array"; |
| 1277 | char* cp; |
| 1278 | int ok; |
| 1279 | |
| 1280 | if (dir->tdir_type == TIFF_RATIONAL) |
| 1281 | return (TIFFFetchNormalTag(tif, dir)); |
| 1282 | /* |
| 1283 | * Handle LONG's for backward compatibility. |
| 1284 | */ |
| 1285 | cp = CheckMalloc(tif, dir->tdir_count * sizeof (uint32), mesg); |
| 1286 | if( (ok = (cp && TIFFFetchLongArray(tif, dir, (uint32*) cp))) != 0) { |
| 1287 | float* fp = (float*) |
| 1288 | CheckMalloc(tif, dir->tdir_count * sizeof (float), mesg); |
| 1289 | if( (ok = (fp != NULL)) != 0 ) { |
| 1290 | uint32 i; |
| 1291 | for (i = 0; i < dir->tdir_count; i++) |
| 1292 | fp[i] = (float)((uint32*) cp)[i]; |
| 1293 | ok = TIFFSetField(tif, dir->tdir_tag, fp); |
| 1294 | _TIFFfree((char*) fp); |
| 1295 | } |
| 1296 | } |
| 1297 | if (cp) |
| 1298 | _TIFFfree(cp); |
| 1299 | return (ok); |
| 1300 | } |
| 1301 | #endif |
| 1302 | |
| 1303 | /* |
| 1304 | * Replace a single strip (tile) of uncompressed data by |
| 1305 | * multiple strips (tiles), each approximately 8Kbytes. |
| 1306 | * This is useful for dealing with large images or |
| 1307 | * for dealing with machines with a limited amount |
| 1308 | * memory. |
| 1309 | */ |
| 1310 | static void |
| 1311 | ChopUpSingleUncompressedStrip(TIFF* tif) |
| 1312 | { |
| 1313 | register TIFFDirectory *td = &tif->tif_dir; |
| 1314 | uint32 bytecount = td->td_stripbytecount[0]; |
| 1315 | uint32 offset = td->td_stripoffset[0]; |
| 1316 | tsize_t rowbytes = TIFFVTileSize(tif, 1), stripbytes; |
| 1317 | tstrip_t strip, nstrips, rowsperstrip; |
| 1318 | uint32* newcounts; |
| 1319 | uint32* newoffsets; |
| 1320 | |
| 1321 | /* |
| 1322 | * Make the rows hold at least one |
| 1323 | * scanline, but fill 8k if possible. |
| 1324 | */ |
| 1325 | if (rowbytes > 8192) { |
| 1326 | stripbytes = rowbytes; |
| 1327 | rowsperstrip = 1; |
| 1328 | } else { |
| 1329 | rowsperstrip = 8192 / rowbytes; |
| 1330 | stripbytes = rowbytes * rowsperstrip; |
| 1331 | } |
| 1332 | /* never increase the number of strips in an image */ |
| 1333 | if (rowsperstrip >= td->td_rowsperstrip) |
| 1334 | return; |
| 1335 | nstrips = (tstrip_t) TIFFhowmany(bytecount, stripbytes); |
| 1336 | newcounts = (uint32*) CheckMalloc(tif, nstrips * sizeof (uint32), |
| 1337 | "for chopped \"StripByteCounts\" array"); |
| 1338 | newoffsets = (uint32*) CheckMalloc(tif, nstrips * sizeof (uint32), |
| 1339 | "for chopped \"StripOffsets\" array"); |
| 1340 | if (newcounts == NULL || newoffsets == NULL) { |
| 1341 | /* |
| 1342 | * Unable to allocate new strip information, give |
| 1343 | * up and use the original one strip information. |
| 1344 | */ |
| 1345 | if (newcounts != NULL) |
| 1346 | _TIFFfree(newcounts); |
| 1347 | if (newoffsets != NULL) |
| 1348 | _TIFFfree(newoffsets); |
| 1349 | return; |
| 1350 | } |
| 1351 | /* |
| 1352 | * Fill the strip information arrays with |
| 1353 | * new bytecounts and offsets that reflect |
| 1354 | * the broken-up format. |
| 1355 | */ |
| 1356 | for (strip = 0; strip < nstrips; strip++) { |
| 1357 | if (stripbytes > bytecount) |
| 1358 | stripbytes = bytecount; |
| 1359 | newcounts[strip] = stripbytes; |
| 1360 | newoffsets[strip] = offset; |
| 1361 | offset += stripbytes; |
| 1362 | bytecount -= stripbytes; |
| 1363 | } |
| 1364 | /* |
| 1365 | * Replace old single strip info with multi-strip info. |
| 1366 | */ |
| 1367 | td->td_stripsperimage = td->td_nstrips = nstrips; |
| 1368 | TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip); |
| 1369 | |
| 1370 | _TIFFfree(td->td_stripbytecount); |
| 1371 | _TIFFfree(td->td_stripoffset); |
| 1372 | td->td_stripbytecount = newcounts; |
| 1373 | td->td_stripoffset = newoffsets; |
| 1374 | } |