dll/3rdparty/libtiff/tif_aux.c

   1 /* $Id: tif_aux.c,v 1.31 2017-11-17 20:21:00 erouault Exp $ */
   2
   3 /*
   4  * Copyright (c) 1991-1997 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  * Auxiliary Support Routines.
  31  */
  32
  33 #include <precomp.h>
  34 #include "tif_predict.h"
  35 #include <math.h>
  36
  37 uint32
  38 _TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
  39 {
  40         uint32 bytes = first * second;
  41
  42         if (second && bytes / second != first) {
  43                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  44                 bytes = 0;
  45         }
  46
  47         return bytes;
  48 }
  49
  50 uint64
  51 _TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
  52 {
  53         uint64 bytes = first * second;
  54
  55         if (second && bytes / second != first) {
  56                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  57                 bytes = 0;
  58         }
  59
  60         return bytes;
  61 }
  62
  63 void*
  64 _TIFFCheckRealloc(TIFF* tif, void* buffer,
  65                   tmsize_t nmemb, tmsize_t elem_size, const char* what)
  66 {
  67         void* cp = NULL;
  68         tmsize_t bytes = nmemb * elem_size;
  69
  70         /*
  71          * XXX: Check for integer overflow.
  72          */
  73         if (nmemb && elem_size && bytes / elem_size == nmemb)
  74                 cp = _TIFFrealloc(buffer, bytes);
  75
  76         if (cp == NULL) {
  77                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
  78                              "Failed to allocate memory for %s "
  79                              "(%ld elements of %ld bytes each)",
  80                              what,(long) nmemb, (long) elem_size);
  81         }
  82
  83         return cp;
  84 }
  85
  86 void*
  87 _TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
  88 {
  89         return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
  90 }
  91
  92 static int
  93 TIFFDefaultTransferFunction(TIFFDirectory* td)
  94 {
  95         uint16 **tf = td->td_transferfunction;
  96         tmsize_t i, n, nbytes;
  97
  98         tf[0] = tf[1] = tf[2] = 0;
  99         if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
 100                 return 0;
 101
 102         n = ((tmsize_t)1)<<td->td_bitspersample;
 103         nbytes = n * sizeof (uint16);
 104         tf[0] = (uint16 *)_TIFFmalloc(nbytes);
 105         if (tf[0] == NULL)
 106                 return 0;
 107         tf[0][0] = 0;
 108         for (i = 1; i < n; i++) {
 109                 double t = (double)i/((double) n-1.);
 110                 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
 111         }
 112
 113         if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 114                 tf[1] = (uint16 *)_TIFFmalloc(nbytes);
 115                 if(tf[1] == NULL)
 116                         goto bad;
 117                 _TIFFmemcpy(tf[1], tf[0], nbytes);
 118                 tf[2] = (uint16 *)_TIFFmalloc(nbytes);
 119                 if (tf[2] == NULL)
 120                         goto bad;
 121                 _TIFFmemcpy(tf[2], tf[0], nbytes);
 122         }
 123         return 1;
 124
 125 bad:
 126         if (tf[0])
 127                 _TIFFfree(tf[0]);
 128         if (tf[1])
 129                 _TIFFfree(tf[1]);
 130         if (tf[2])
 131                 _TIFFfree(tf[2]);
 132         tf[0] = tf[1] = tf[2] = 0;
 133         return 0;
 134 }
 135
 136 static int
 137 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
 138 {
 139         int i;
 140
 141         td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
 142         if (td->td_refblackwhite == NULL)
 143                 return 0;
 144         if (td->td_photometric == PHOTOMETRIC_YCBCR) {
 145                 /*
 146                  * YCbCr (Class Y) images must have the ReferenceBlackWhite
 147                  * tag set. Fix the broken images, which lacks that tag.
 148                  */
 149                 td->td_refblackwhite[0] = 0.0F;
 150                 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
 151                         td->td_refblackwhite[5] = 255.0F;
 152                 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
 153         } else {
 154                 /*
 155                  * Assume RGB (Class R)
 156                  */
 157                 for (i = 0; i < 3; i++) {
 158                     td->td_refblackwhite[2*i+0] = 0;
 159                     td->td_refblackwhite[2*i+1] =
 160                             (float)((1L<<td->td_bitspersample)-1L);
 161                 }
 162         }
 163         return 1;
 164 }
 165
 166 /*
 167  * Like TIFFGetField, but return any default
 168  * value if the tag is not present in the directory.
 169  *
 170  * NB:  We use the value in the directory, rather than
 171  *      explicit values so that defaults exist only one
 172  *      place in the library -- in TIFFDefaultDirectory.
 173  */
 174 int
 175 TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
 176 {
 177         TIFFDirectory *td = &tif->tif_dir;
 178
 179         if (TIFFVGetField(tif, tag, ap))
 180                 return (1);
 181         switch (tag) {
 182         case TIFFTAG_SUBFILETYPE:
 183                 *va_arg(ap, uint32 *) = td->td_subfiletype;
 184                 return (1);
 185         case TIFFTAG_BITSPERSAMPLE:
 186                 *va_arg(ap, uint16 *) = td->td_bitspersample;
 187                 return (1);
 188         case TIFFTAG_THRESHHOLDING:
 189                 *va_arg(ap, uint16 *) = td->td_threshholding;
 190                 return (1);
 191         case TIFFTAG_FILLORDER:
 192                 *va_arg(ap, uint16 *) = td->td_fillorder;
 193                 return (1);
 194         case TIFFTAG_ORIENTATION:
 195                 *va_arg(ap, uint16 *) = td->td_orientation;
 196                 return (1);
 197         case TIFFTAG_SAMPLESPERPIXEL:
 198                 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
 199                 return (1);
 200         case TIFFTAG_ROWSPERSTRIP:
 201                 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
 202                 return (1);
 203         case TIFFTAG_MINSAMPLEVALUE:
 204                 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
 205                 return (1);
 206         case TIFFTAG_MAXSAMPLEVALUE:
 207                 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
 208                 return (1);
 209         case TIFFTAG_PLANARCONFIG:
 210                 *va_arg(ap, uint16 *) = td->td_planarconfig;
 211                 return (1);
 212         case TIFFTAG_RESOLUTIONUNIT:
 213                 *va_arg(ap, uint16 *) = td->td_resolutionunit;
 214                 return (1);
 215         case TIFFTAG_PREDICTOR:
 216     {
 217         TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
 218         if( sp == NULL )
 219         {
 220             TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
 221                          "Cannot get \"Predictor\" tag as plugin is not configured");
 222             *va_arg(ap, uint16*) = 0;
 223             return 0;
 224         }
 225         *va_arg(ap, uint16*) = (uint16) sp->predictor;
 226         return 1;
 227     }
 228         case TIFFTAG_DOTRANGE:
 229                 *va_arg(ap, uint16 *) = 0;
 230                 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
 231                 return (1);
 232         case TIFFTAG_INKSET:
 233                 *va_arg(ap, uint16 *) = INKSET_CMYK;
 234                 return 1;
 235         case TIFFTAG_NUMBEROFINKS:
 236                 *va_arg(ap, uint16 *) = 4;
 237                 return (1);
 238         case TIFFTAG_EXTRASAMPLES:
 239                 *va_arg(ap, uint16 *) = td->td_extrasamples;
 240                 *va_arg(ap, uint16 **) = td->td_sampleinfo;
 241                 return (1);
 242         case TIFFTAG_MATTEING:
 243                 *va_arg(ap, uint16 *) =
 244                     (td->td_extrasamples == 1 &&
 245                      td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
 246                 return (1);
 247         case TIFFTAG_TILEDEPTH:
 248                 *va_arg(ap, uint32 *) = td->td_tiledepth;
 249                 return (1);
 250         case TIFFTAG_DATATYPE:
 251                 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
 252                 return (1);
 253         case TIFFTAG_SAMPLEFORMAT:
 254                 *va_arg(ap, uint16 *) = td->td_sampleformat;
 255                 return(1);
 256         case TIFFTAG_IMAGEDEPTH:
 257                 *va_arg(ap, uint32 *) = td->td_imagedepth;
 258                 return (1);
 259         case TIFFTAG_YCBCRCOEFFICIENTS:
 260                 {
 261                         /* defaults are from CCIR Recommendation 601-1 */
 262                         static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
 263                         *va_arg(ap, float **) = ycbcrcoeffs;
 264                         return 1;
 265                 }
 266         case TIFFTAG_YCBCRSUBSAMPLING:
 267                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
 268                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
 269                 return (1);
 270         case TIFFTAG_YCBCRPOSITIONING:
 271                 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
 272                 return (1);
 273         case TIFFTAG_WHITEPOINT:
 274                 {
 275                         static float whitepoint[2];
 276
 277                         /* TIFF 6.0 specification tells that it is no default
 278                            value for the WhitePoint, but AdobePhotoshop TIFF
 279                            Technical Note tells that it should be CIE D50. */
 280                         whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
 281                         whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
 282                         *va_arg(ap, float **) = whitepoint;
 283                         return 1;
 284                 }
 285         case TIFFTAG_TRANSFERFUNCTION:
 286                 if (!td->td_transferfunction[0] &&
 287                     !TIFFDefaultTransferFunction(td)) {
 288                         TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
 289                         return (0);
 290                 }
 291                 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
 292                 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 293                         *va_arg(ap, uint16 **) = td->td_transferfunction[1];
 294                         *va_arg(ap, uint16 **) = td->td_transferfunction[2];
 295                 }
 296                 return (1);
 297         case TIFFTAG_REFERENCEBLACKWHITE:
 298                 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 299                         return (0);
 300                 *va_arg(ap, float **) = td->td_refblackwhite;
 301                 return (1);
 302         }
 303         return 0;
 304 }
 305
 306 /*
 307  * Like TIFFGetField, but return any default
 308  * value if the tag is not present in the directory.
 309  */
 310 int
 311 TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
 312 {
 313         int ok;
 314         va_list ap;
 315
 316         va_start(ap, tag);
 317         ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
 318         va_end(ap);
 319         return (ok);
 320 }
 321
 322 struct _Int64Parts {
 323         int32 low, high;
 324 };
 325
 326 typedef union {
 327         struct _Int64Parts part;
 328         int64 value;
 329 } _Int64;
 330
 331 float
 332 _TIFFUInt64ToFloat(uint64 ui64)
 333 {
 334         _Int64 i;
 335
 336         i.value = ui64;
 337         if (i.part.high >= 0) {
 338                 return (float)i.value;
 339         } else {
 340                 long double df;
 341                 df = (long double)i.value;
 342                 df += 18446744073709551616.0; /* adding 2**64 */
 343                 return (float)df;
 344         }
 345 }
 346
 347 double
 348 _TIFFUInt64ToDouble(uint64 ui64)
 349 {
 350         _Int64 i;
 351
 352         i.value = ui64;
 353         if (i.part.high >= 0) {
 354                 return (double)i.value;
 355         } else {
 356                 long double df;
 357                 df = (long double)i.value;
 358                 df += 18446744073709551616.0; /* adding 2**64 */
 359                 return (double)df;
 360         }
 361 }
 362
 363 int _TIFFSeekOK(TIFF* tif, toff_t off)
 364 {
 365     /* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
 366     /* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
 367     return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
 368 }
 369
 370 /* vim: set ts=8 sts=8 sw=8 noet: */
 371 /*
 372  * Local Variables:
 373  * mode: c
 374  * c-basic-offset: 8
 375  * fill-column: 78
 376  * End:
 377  */