1 /* $Id: tif_write.c,v 1.36 2011-02-18 20:53:04 fwarmerdam Exp $ */ 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 * Scanline-oriented Write Support 31 */ 32 #include "tiffiop.h" 33 #include <stdio.h> 34 35 #define STRIPINCR 20 /* expansion factor on strip array */ 36 37 #define WRITECHECKSTRIPS(tif, module) \ 38 (((tif)->tif_flags&TIFF_BEENWRITING) || TIFFWriteCheck((tif),0,module)) 39 #define WRITECHECKTILES(tif, module) \ 40 (((tif)->tif_flags&TIFF_BEENWRITING) || TIFFWriteCheck((tif),1,module)) 41 #define BUFFERCHECK(tif) \ 42 ((((tif)->tif_flags & TIFF_BUFFERSETUP) && tif->tif_rawdata) || \ 43 TIFFWriteBufferSetup((tif), NULL, (tmsize_t) -1)) 44 45 static int TIFFGrowStrips(TIFF* tif, uint32 delta, const char* module); 46 static int TIFFAppendToStrip(TIFF* tif, uint32 strip, uint8* data, tmsize_t cc); 47 48 int 49 TIFFWriteScanline(TIFF* tif, void* buf, uint32 row, uint16 sample) 50 { 51 static const char module[] = "TIFFWriteScanline"; 52 register TIFFDirectory *td; 53 int status, imagegrew = 0; 54 uint32 strip; 55 56 if (!WRITECHECKSTRIPS(tif, module)) 57 return (-1); 58 /* 59 * Handle delayed allocation of data buffer. This 60 * permits it to be sized more intelligently (using 61 * directory information). 62 */ 63 if (!BUFFERCHECK(tif)) 64 return (-1); 65 tif->tif_flags |= TIFF_BUF4WRITE; /* not strictly sure this is right*/ 66 67 td = &tif->tif_dir; 68 /* 69 * Extend image length if needed 70 * (but only for PlanarConfig=1). 71 */ 72 if (row >= td->td_imagelength) { /* extend image */ 73 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { 74 TIFFErrorExt(tif->tif_clientdata, module, 75 "Can not change \"ImageLength\" when using separate planes"); 76 return (-1); 77 } 78 td->td_imagelength = row+1; 79 imagegrew = 1; 80 } 81 /* 82 * Calculate strip and check for crossings. 83 */ 84 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { 85 if (sample >= td->td_samplesperpixel) { 86 TIFFErrorExt(tif->tif_clientdata, module, 87 "%lu: Sample out of range, max %lu", 88 (unsigned long) sample, (unsigned long) td->td_samplesperpixel); 89 return (-1); 90 } 91 strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip; 92 } else 93 strip = row / td->td_rowsperstrip; 94 /* 95 * Check strip array to make sure there's space. We don't support 96 * dynamically growing files that have data organized in separate 97 * bitplanes because it's too painful. In that case we require that 98 * the imagelength be set properly before the first write (so that the 99 * strips array will be fully allocated above). 100 */ 101 if (strip >= td->td_nstrips && !TIFFGrowStrips(tif, 1, module)) 102 return (-1); 103 if (strip != tif->tif_curstrip) { 104 /* 105 * Changing strips -- flush any data present. 106 */ 107 if (!TIFFFlushData(tif)) 108 return (-1); 109 tif->tif_curstrip = strip; 110 /* 111 * Watch out for a growing image. The value of strips/image 112 * will initially be 1 (since it can't be deduced until the 113 * imagelength is known). 114 */ 115 if (strip >= td->td_stripsperimage && imagegrew) 116 td->td_stripsperimage = 117 TIFFhowmany_32(td->td_imagelength,td->td_rowsperstrip); 118 tif->tif_row = 119 (strip % td->td_stripsperimage) * td->td_rowsperstrip; 120 if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { 121 if (!(*tif->tif_setupencode)(tif)) 122 return (-1); 123 tif->tif_flags |= TIFF_CODERSETUP; 124 } 125 126 tif->tif_rawcc = 0; 127 tif->tif_rawcp = tif->tif_rawdata; 128 129 if( td->td_stripbytecount[strip] > 0 ) 130 { 131 /* if we are writing over existing tiles, zero length */ 132 td->td_stripbytecount[strip] = 0; 133 134 /* this forces TIFFAppendToStrip() to do a seek */ 135 tif->tif_curoff = 0; 136 } 137 138 if (!(*tif->tif_preencode)(tif, sample)) 139 return (-1); 140 tif->tif_flags |= TIFF_POSTENCODE; 141 } 142 /* 143 * Ensure the write is either sequential or at the 144 * beginning of a strip (or that we can randomly 145 * access the data -- i.e. no encoding). 146 */ 147 if (row != tif->tif_row) { 148 if (row < tif->tif_row) { 149 /* 150 * Moving backwards within the same strip: 151 * backup to the start and then decode 152 * forward (below). 153 */ 154 tif->tif_row = (strip % td->td_stripsperimage) * 155 td->td_rowsperstrip; 156 tif->tif_rawcp = tif->tif_rawdata; 157 } 158 /* 159 * Seek forward to the desired row. 160 */ 161 if (!(*tif->tif_seek)(tif, row - tif->tif_row)) 162 return (-1); 163 tif->tif_row = row; 164 } 165 166 /* swab if needed - note that source buffer will be altered */ 167 tif->tif_postdecode( tif, (uint8*) buf, tif->tif_scanlinesize ); 168 169 status = (*tif->tif_encoderow)(tif, (uint8*) buf, 170 tif->tif_scanlinesize, sample); 171 172 /* we are now poised at the beginning of the next row */ 173 tif->tif_row = row + 1; 174 return (status); 175 } 176 177 /* 178 * Encode the supplied data and write it to the 179 * specified strip. 180 * 181 * NB: Image length must be setup before writing. 182 */ 183 tmsize_t 184 TIFFWriteEncodedStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc) 185 { 186 static const char module[] = "TIFFWriteEncodedStrip"; 187 TIFFDirectory *td = &tif->tif_dir; 188 uint16 sample; 189 190 if (!WRITECHECKSTRIPS(tif, module)) 191 return ((tmsize_t) -1); 192 /* 193 * Check strip array to make sure there's space. 194 * We don't support dynamically growing files that 195 * have data organized in separate bitplanes because 196 * it's too painful. In that case we require that 197 * the imagelength be set properly before the first 198 * write (so that the strips array will be fully 199 * allocated above). 200 */ 201 if (strip >= td->td_nstrips) { 202 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { 203 TIFFErrorExt(tif->tif_clientdata, module, 204 "Can not grow image by strips when using separate planes"); 205 return ((tmsize_t) -1); 206 } 207 if (!TIFFGrowStrips(tif, 1, module)) 208 return ((tmsize_t) -1); 209 td->td_stripsperimage = 210 TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip); 211 } 212 /* 213 * Handle delayed allocation of data buffer. This 214 * permits it to be sized according to the directory 215 * info. 216 */ 217 if (!BUFFERCHECK(tif)) 218 return ((tmsize_t) -1); 219 220 tif->tif_flags |= TIFF_BUF4WRITE; 221 tif->tif_curstrip = strip; 222 223 tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip; 224 if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { 225 if (!(*tif->tif_setupencode)(tif)) 226 return ((tmsize_t) -1); 227 tif->tif_flags |= TIFF_CODERSETUP; 228 } 229 230 tif->tif_rawcc = 0; 231 tif->tif_rawcp = tif->tif_rawdata; 232 233 if( td->td_stripbytecount[strip] > 0 ) 234 { 235 /* Force TIFFAppendToStrip() to consider placing data at end 236 of file. */ 237 tif->tif_curoff = 0; 238 } 239 240 tif->tif_flags &= ~TIFF_POSTENCODE; 241 sample = (uint16)(strip / td->td_stripsperimage); 242 if (!(*tif->tif_preencode)(tif, sample)) 243 return ((tmsize_t) -1); 244 245 /* swab if needed - note that source buffer will be altered */ 246 tif->tif_postdecode( tif, (uint8*) data, cc ); 247 248 if (!(*tif->tif_encodestrip)(tif, (uint8*) data, cc, sample)) 249 return (0); 250 if (!(*tif->tif_postencode)(tif)) 251 return ((tmsize_t) -1); 252 if (!isFillOrder(tif, td->td_fillorder) && 253 (tif->tif_flags & TIFF_NOBITREV) == 0) 254 TIFFReverseBits(tif->tif_rawdata, tif->tif_rawcc); 255 if (tif->tif_rawcc > 0 && 256 !TIFFAppendToStrip(tif, strip, tif->tif_rawdata, tif->tif_rawcc)) 257 return ((tmsize_t) -1); 258 tif->tif_rawcc = 0; 259 tif->tif_rawcp = tif->tif_rawdata; 260 return (cc); 261 } 262 263 /* 264 * Write the supplied data to the specified strip. 265 * 266 * NB: Image length must be setup before writing. 267 */ 268 tmsize_t 269 TIFFWriteRawStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc) 270 { 271 static const char module[] = "TIFFWriteRawStrip"; 272 TIFFDirectory *td = &tif->tif_dir; 273 274 if (!WRITECHECKSTRIPS(tif, module)) 275 return ((tmsize_t) -1); 276 /* 277 * Check strip array to make sure there's space. 278 * We don't support dynamically growing files that 279 * have data organized in separate bitplanes because 280 * it's too painful. In that case we require that 281 * the imagelength be set properly before the first 282 * write (so that the strips array will be fully 283 * allocated above). 284 */ 285 if (strip >= td->td_nstrips) { 286 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { 287 TIFFErrorExt(tif->tif_clientdata, module, 288 "Can not grow image by strips when using separate planes"); 289 return ((tmsize_t) -1); 290 } 291 /* 292 * Watch out for a growing image. The value of 293 * strips/image will initially be 1 (since it 294 * can't be deduced until the imagelength is known). 295 */ 296 if (strip >= td->td_stripsperimage) 297 td->td_stripsperimage = 298 TIFFhowmany_32(td->td_imagelength,td->td_rowsperstrip); 299 if (!TIFFGrowStrips(tif, 1, module)) 300 return ((tmsize_t) -1); 301 } 302 tif->tif_curstrip = strip; 303 tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip; 304 return (TIFFAppendToStrip(tif, strip, (uint8*) data, cc) ? 305 cc : (tmsize_t) -1); 306 } 307 308 /* 309 * Write and compress a tile of data. The 310 * tile is selected by the (x,y,z,s) coordinates. 311 */ 312 tmsize_t 313 TIFFWriteTile(TIFF* tif, void* buf, uint32 x, uint32 y, uint32 z, uint16 s) 314 { 315 if (!TIFFCheckTile(tif, x, y, z, s)) 316 return ((tmsize_t)(-1)); 317 /* 318 * NB: A tile size of -1 is used instead of tif_tilesize knowing 319 * that TIFFWriteEncodedTile will clamp this to the tile size. 320 * This is done because the tile size may not be defined until 321 * after the output buffer is setup in TIFFWriteBufferSetup. 322 */ 323 return (TIFFWriteEncodedTile(tif, 324 TIFFComputeTile(tif, x, y, z, s), buf, (tmsize_t)(-1))); 325 } 326 327 /* 328 * Encode the supplied data and write it to the 329 * specified tile. There must be space for the 330 * data. The function clamps individual writes 331 * to a tile to the tile size, but does not (and 332 * can not) check that multiple writes to the same 333 * tile do not write more than tile size data. 334 * 335 * NB: Image length must be setup before writing; this 336 * interface does not support automatically growing 337 * the image on each write (as TIFFWriteScanline does). 338 */ 339 tmsize_t 340 TIFFWriteEncodedTile(TIFF* tif, uint32 tile, void* data, tmsize_t cc) 341 { 342 static const char module[] = "TIFFWriteEncodedTile"; 343 TIFFDirectory *td; 344 uint16 sample; 345 346 if (!WRITECHECKTILES(tif, module)) 347 return ((tmsize_t)(-1)); 348 td = &tif->tif_dir; 349 if (tile >= td->td_nstrips) { 350 TIFFErrorExt(tif->tif_clientdata, module, "Tile %lu out of range, max %lu", 351 (unsigned long) tile, (unsigned long) td->td_nstrips); 352 return ((tmsize_t)(-1)); 353 } 354 /* 355 * Handle delayed allocation of data buffer. This 356 * permits it to be sized more intelligently (using 357 * directory information). 358 */ 359 if (!BUFFERCHECK(tif)) 360 return ((tmsize_t)(-1)); 361 362 tif->tif_flags |= TIFF_BUF4WRITE; 363 tif->tif_curtile = tile; 364 365 tif->tif_rawcc = 0; 366 tif->tif_rawcp = tif->tif_rawdata; 367 368 if( td->td_stripbytecount[tile] > 0 ) 369 { 370 /* Force TIFFAppendToStrip() to consider placing data at end 371 of file. */ 372 tif->tif_curoff = 0; 373 } 374 375 /* 376 * Compute tiles per row & per column to compute 377 * current row and column 378 */ 379 tif->tif_row = (tile % TIFFhowmany_32(td->td_imagelength, td->td_tilelength)) 380 * td->td_tilelength; 381 tif->tif_col = (tile % TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth)) 382 * td->td_tilewidth; 383 384 if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { 385 if (!(*tif->tif_setupencode)(tif)) 386 return ((tmsize_t)(-1)); 387 tif->tif_flags |= TIFF_CODERSETUP; 388 } 389 tif->tif_flags &= ~TIFF_POSTENCODE; 390 sample = (uint16)(tile/td->td_stripsperimage); 391 if (!(*tif->tif_preencode)(tif, sample)) 392 return ((tmsize_t)(-1)); 393 /* 394 * Clamp write amount to the tile size. This is mostly 395 * done so that callers can pass in some large number 396 * (e.g. -1) and have the tile size used instead. 397 */ 398 if ( cc < 1 || cc > tif->tif_tilesize) 399 cc = tif->tif_tilesize; 400 401 /* swab if needed - note that source buffer will be altered */ 402 tif->tif_postdecode( tif, (uint8*) data, cc ); 403 404 if (!(*tif->tif_encodetile)(tif, (uint8*) data, cc, sample)) 405 return (0); 406 if (!(*tif->tif_postencode)(tif)) 407 return ((tmsize_t)(-1)); 408 if (!isFillOrder(tif, td->td_fillorder) && 409 (tif->tif_flags & TIFF_NOBITREV) == 0) 410 TIFFReverseBits((uint8*)tif->tif_rawdata, tif->tif_rawcc); 411 if (tif->tif_rawcc > 0 && !TIFFAppendToStrip(tif, tile, 412 tif->tif_rawdata, tif->tif_rawcc)) 413 return ((tmsize_t)(-1)); 414 tif->tif_rawcc = 0; 415 tif->tif_rawcp = tif->tif_rawdata; 416 return (cc); 417 } 418 419 /* 420 * Write the supplied data to the specified strip. 421 * There must be space for the data; we don't check 422 * if strips overlap! 423 * 424 * NB: Image length must be setup before writing; this 425 * interface does not support automatically growing 426 * the image on each write (as TIFFWriteScanline does). 427 */ 428 tmsize_t 429 TIFFWriteRawTile(TIFF* tif, uint32 tile, void* data, tmsize_t cc) 430 { 431 static const char module[] = "TIFFWriteRawTile"; 432 433 if (!WRITECHECKTILES(tif, module)) 434 return ((tmsize_t)(-1)); 435 if (tile >= tif->tif_dir.td_nstrips) { 436 TIFFErrorExt(tif->tif_clientdata, module, "Tile %lu out of range, max %lu", 437 (unsigned long) tile, 438 (unsigned long) tif->tif_dir.td_nstrips); 439 return ((tmsize_t)(-1)); 440 } 441 return (TIFFAppendToStrip(tif, tile, (uint8*) data, cc) ? 442 cc : (tmsize_t)(-1)); 443 } 444 445 #define isUnspecified(tif, f) \ 446 (TIFFFieldSet(tif,f) && (tif)->tif_dir.td_imagelength == 0) 447 448 int 449 TIFFSetupStrips(TIFF* tif) 450 { 451 TIFFDirectory* td = &tif->tif_dir; 452 453 if (isTiled(tif)) 454 td->td_stripsperimage = 455 isUnspecified(tif, FIELD_TILEDIMENSIONS) ? 456 td->td_samplesperpixel : TIFFNumberOfTiles(tif); 457 else 458 td->td_stripsperimage = 459 isUnspecified(tif, FIELD_ROWSPERSTRIP) ? 460 td->td_samplesperpixel : TIFFNumberOfStrips(tif); 461 td->td_nstrips = td->td_stripsperimage; 462 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) 463 td->td_stripsperimage /= td->td_samplesperpixel; 464 td->td_stripoffset = (uint64 *) 465 _TIFFmalloc(td->td_nstrips * sizeof (uint64)); 466 td->td_stripbytecount = (uint64 *) 467 _TIFFmalloc(td->td_nstrips * sizeof (uint64)); 468 if (td->td_stripoffset == NULL || td->td_stripbytecount == NULL) 469 return (0); 470 /* 471 * Place data at the end-of-file 472 * (by setting offsets to zero). 473 */ 474 _TIFFmemset(td->td_stripoffset, 0, td->td_nstrips*sizeof (uint64)); 475 _TIFFmemset(td->td_stripbytecount, 0, td->td_nstrips*sizeof (uint64)); 476 TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS); 477 TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); 478 return (1); 479 } 480 #undef isUnspecified 481 482 /* 483 * Verify file is writable and that the directory 484 * information is setup properly. In doing the latter 485 * we also "freeze" the state of the directory so 486 * that important information is not changed. 487 */ 488 int 489 TIFFWriteCheck(TIFF* tif, int tiles, const char* module) 490 { 491 if (tif->tif_mode == O_RDONLY) { 492 TIFFErrorExt(tif->tif_clientdata, module, "File not open for writing"); 493 return (0); 494 } 495 if (tiles ^ isTiled(tif)) { 496 TIFFErrorExt(tif->tif_clientdata, module, tiles ? 497 "Can not write tiles to a stripped image" : 498 "Can not write scanlines to a tiled image"); 499 return (0); 500 } 501 502 _TIFFFillStriles( tif ); 503 504 /* 505 * On the first write verify all the required information 506 * has been setup and initialize any data structures that 507 * had to wait until directory information was set. 508 * Note that a lot of our work is assumed to remain valid 509 * because we disallow any of the important parameters 510 * from changing after we start writing (i.e. once 511 * TIFF_BEENWRITING is set, TIFFSetField will only allow 512 * the image's length to be changed). 513 */ 514 if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) { 515 TIFFErrorExt(tif->tif_clientdata, module, 516 "Must set \"ImageWidth\" before writing data"); 517 return (0); 518 } 519 if (tif->tif_dir.td_samplesperpixel == 1) { 520 /* 521 * Planarconfiguration is irrelevant in case of single band 522 * images and need not be included. We will set it anyway, 523 * because this field is used in other parts of library even 524 * in the single band case. 525 */ 526 if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) 527 tif->tif_dir.td_planarconfig = PLANARCONFIG_CONTIG; 528 } else { 529 if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) { 530 TIFFErrorExt(tif->tif_clientdata, module, 531 "Must set \"PlanarConfiguration\" before writing data"); 532 return (0); 533 } 534 } 535 if (tif->tif_dir.td_stripoffset == NULL && !TIFFSetupStrips(tif)) { 536 tif->tif_dir.td_nstrips = 0; 537 TIFFErrorExt(tif->tif_clientdata, module, "No space for %s arrays", 538 isTiled(tif) ? "tile" : "strip"); 539 return (0); 540 } 541 if (isTiled(tif)) 542 { 543 tif->tif_tilesize = TIFFTileSize(tif); 544 if (tif->tif_tilesize == 0) 545 return (0); 546 } 547 else 548 tif->tif_tilesize = (tmsize_t)(-1); 549 tif->tif_scanlinesize = TIFFScanlineSize(tif); 550 if (tif->tif_scanlinesize == 0) 551 return (0); 552 tif->tif_flags |= TIFF_BEENWRITING; 553 return (1); 554 } 555 556 /* 557 * Setup the raw data buffer used for encoding. 558 */ 559 int 560 TIFFWriteBufferSetup(TIFF* tif, void* bp, tmsize_t size) 561 { 562 static const char module[] = "TIFFWriteBufferSetup"; 563 564 if (tif->tif_rawdata) { 565 if (tif->tif_flags & TIFF_MYBUFFER) { 566 _TIFFfree(tif->tif_rawdata); 567 tif->tif_flags &= ~TIFF_MYBUFFER; 568 } 569 tif->tif_rawdata = NULL; 570 } 571 if (size == (tmsize_t)(-1)) { 572 size = (isTiled(tif) ? 573 tif->tif_tilesize : TIFFStripSize(tif)); 574 /* 575 * Make raw data buffer at least 8K 576 */ 577 if (size < 8*1024) 578 size = 8*1024; 579 bp = NULL; /* NB: force malloc */ 580 } 581 if (bp == NULL) { 582 bp = _TIFFmalloc(size); 583 if (bp == NULL) { 584 TIFFErrorExt(tif->tif_clientdata, module, "No space for output buffer"); 585 return (0); 586 } 587 tif->tif_flags |= TIFF_MYBUFFER; 588 } else 589 tif->tif_flags &= ~TIFF_MYBUFFER; 590 tif->tif_rawdata = (uint8*) bp; 591 tif->tif_rawdatasize = size; 592 tif->tif_rawcc = 0; 593 tif->tif_rawcp = tif->tif_rawdata; 594 tif->tif_flags |= TIFF_BUFFERSETUP; 595 return (1); 596 } 597 598 /* 599 * Grow the strip data structures by delta strips. 600 */ 601 static int 602 TIFFGrowStrips(TIFF* tif, uint32 delta, const char* module) 603 { 604 TIFFDirectory *td = &tif->tif_dir; 605 uint64* new_stripoffset; 606 uint64* new_stripbytecount; 607 608 assert(td->td_planarconfig == PLANARCONFIG_CONTIG); 609 new_stripoffset = (uint64*)_TIFFrealloc(td->td_stripoffset, 610 (td->td_nstrips + delta) * sizeof (uint64)); 611 new_stripbytecount = (uint64*)_TIFFrealloc(td->td_stripbytecount, 612 (td->td_nstrips + delta) * sizeof (uint64)); 613 if (new_stripoffset == NULL || new_stripbytecount == NULL) { 614 if (new_stripoffset) 615 _TIFFfree(new_stripoffset); 616 if (new_stripbytecount) 617 _TIFFfree(new_stripbytecount); 618 td->td_nstrips = 0; 619 TIFFErrorExt(tif->tif_clientdata, module, "No space to expand strip arrays"); 620 return (0); 621 } 622 td->td_stripoffset = new_stripoffset; 623 td->td_stripbytecount = new_stripbytecount; 624 _TIFFmemset(td->td_stripoffset + td->td_nstrips, 625 0, delta*sizeof (uint64)); 626 _TIFFmemset(td->td_stripbytecount + td->td_nstrips, 627 0, delta*sizeof (uint64)); 628 td->td_nstrips += delta; 629 tif->tif_flags |= TIFF_DIRTYDIRECT; 630 631 return (1); 632 } 633 634 /* 635 * Append the data to the specified strip. 636 */ 637 static int 638 TIFFAppendToStrip(TIFF* tif, uint32 strip, uint8* data, tmsize_t cc) 639 { 640 static const char module[] = "TIFFAppendToStrip"; 641 TIFFDirectory *td = &tif->tif_dir; 642 uint64 m; 643 int64 old_byte_count = -1; 644 645 if (td->td_stripoffset[strip] == 0 || tif->tif_curoff == 0) { 646 assert(td->td_nstrips > 0); 647 648 if( td->td_stripbytecount[strip] != 0 649 && td->td_stripoffset[strip] != 0 650 && td->td_stripbytecount[strip] >= (uint64) cc ) 651 { 652 /* 653 * There is already tile data on disk, and the new tile 654 * data we have will fit in the same space. The only 655 * aspect of this that is risky is that there could be 656 * more data to append to this strip before we are done 657 * depending on how we are getting called. 658 */ 659 if (!SeekOK(tif, td->td_stripoffset[strip])) { 660 TIFFErrorExt(tif->tif_clientdata, module, 661 "Seek error at scanline %lu", 662 (unsigned long)tif->tif_row); 663 return (0); 664 } 665 } 666 else 667 { 668 /* 669 * Seek to end of file, and set that as our location to 670 * write this strip. 671 */ 672 td->td_stripoffset[strip] = TIFFSeekFile(tif, 0, SEEK_END); 673 tif->tif_flags |= TIFF_DIRTYSTRIP; 674 } 675 676 tif->tif_curoff = td->td_stripoffset[strip]; 677 678 /* 679 * We are starting a fresh strip/tile, so set the size to zero. 680 */ 681 old_byte_count = td->td_stripbytecount[strip]; 682 td->td_stripbytecount[strip] = 0; 683 } 684 685 m = tif->tif_curoff+cc; 686 if (!(tif->tif_flags&TIFF_BIGTIFF)) 687 m = (uint32)m; 688 if ((m<tif->tif_curoff)||(m<(uint64)cc)) 689 { 690 TIFFErrorExt(tif->tif_clientdata, module, "Maximum TIFF file size exceeded"); 691 return (0); 692 } 693 if (!WriteOK(tif, data, cc)) { 694 TIFFErrorExt(tif->tif_clientdata, module, "Write error at scanline %lu", 695 (unsigned long) tif->tif_row); 696 return (0); 697 } 698 tif->tif_curoff = m; 699 td->td_stripbytecount[strip] += cc; 700 701 if( (int64) td->td_stripbytecount[strip] != old_byte_count ) 702 tif->tif_flags |= TIFF_DIRTYSTRIP; 703 704 return (1); 705 } 706 707 /* 708 * Internal version of TIFFFlushData that can be 709 * called by ``encodestrip routines'' w/o concern 710 * for infinite recursion. 711 */ 712 int 713 TIFFFlushData1(TIFF* tif) 714 { 715 if (tif->tif_rawcc > 0 && tif->tif_flags & TIFF_BUF4WRITE ) { 716 if (!isFillOrder(tif, tif->tif_dir.td_fillorder) && 717 (tif->tif_flags & TIFF_NOBITREV) == 0) 718 TIFFReverseBits((uint8*)tif->tif_rawdata, 719 tif->tif_rawcc); 720 if (!TIFFAppendToStrip(tif, 721 isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip, 722 tif->tif_rawdata, tif->tif_rawcc)) 723 return (0); 724 tif->tif_rawcc = 0; 725 tif->tif_rawcp = tif->tif_rawdata; 726 } 727 return (1); 728 } 729 730 /* 731 * Set the current write offset. This should only be 732 * used to set the offset to a known previous location 733 * (very carefully), or to 0 so that the next write gets 734 * appended to the end of the file. 735 */ 736 void 737 TIFFSetWriteOffset(TIFF* tif, toff_t off) 738 { 739 tif->tif_curoff = off; 740 } 741 742 /* vim: set ts=8 sts=8 sw=8 noet: */ 743 /* 744 * Local Variables: 745 * mode: c 746 * c-basic-offset: 8 747 * fill-column: 78 748 * End: 749 */ 750
