dll/3rdparty/libtiff/tif_aux.c

   1 /*
   2  * Copyright (c) 1991-1997 Sam Leffler
   3  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that (i) the above copyright notices and this permission notice appear in
   8  * all copies of the software and related documentation, and (ii) the names of
   9  * Sam Leffler and Silicon Graphics may not be used in any advertising or
  10  * publicity relating to the software without the specific, prior written
  11  * permission of Sam Leffler and Silicon Graphics.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  14  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  15  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  16  *
  17  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
  18  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  19  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  20  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  21  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  22  * OF THIS SOFTWARE.
  23  */
  24
  25 /*
  26  * TIFF Library.
  27  *
  28  * Auxiliary Support Routines.
  29  */
  30
  31 #include <precomp.h>
  32 #include "tif_predict.h"
  33 #include <math.h>
  34
  35 uint32
  36 _TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
  37 {
  38         uint32 bytes = first * second;
  39
  40         if (second && bytes / second != first) {
  41                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  42                 bytes = 0;
  43         }
  44
  45         return bytes;
  46 }
  47
  48 uint64
  49 _TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
  50 {
  51         uint64 bytes = first * second;
  52
  53         if (second && bytes / second != first) {
  54                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  55                 bytes = 0;
  56         }
  57
  58         return bytes;
  59 }
  60
  61 void*
  62 _TIFFCheckRealloc(TIFF* tif, void* buffer,
  63                   tmsize_t nmemb, tmsize_t elem_size, const char* what)
  64 {
  65         void* cp = NULL;
  66         tmsize_t bytes = nmemb * elem_size;
  67
  68         /*
  69          * XXX: Check for integer overflow.
  70          */
  71         if (nmemb && elem_size && bytes / elem_size == nmemb)
  72                 cp = _TIFFrealloc(buffer, bytes);
  73
  74         if (cp == NULL) {
  75                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
  76                              "Failed to allocate memory for %s "
  77                              "(%ld elements of %ld bytes each)",
  78                              what,(long) nmemb, (long) elem_size);
  79         }
  80
  81         return cp;
  82 }
  83
  84 void*
  85 _TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
  86 {
  87         return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
  88 }
  89
  90 static int
  91 TIFFDefaultTransferFunction(TIFFDirectory* td)
  92 {
  93         uint16 **tf = td->td_transferfunction;
  94         tmsize_t i, n, nbytes;
  95
  96         tf[0] = tf[1] = tf[2] = 0;
  97         if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
  98                 return 0;
  99
 100         n = ((tmsize_t)1)<<td->td_bitspersample;
 101         nbytes = n * sizeof (uint16);
 102         tf[0] = (uint16 *)_TIFFmalloc(nbytes);
 103         if (tf[0] == NULL)
 104                 return 0;
 105         tf[0][0] = 0;
 106         for (i = 1; i < n; i++) {
 107                 double t = (double)i/((double) n-1.);
 108                 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
 109         }
 110
 111         if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 112                 tf[1] = (uint16 *)_TIFFmalloc(nbytes);
 113                 if(tf[1] == NULL)
 114                         goto bad;
 115                 _TIFFmemcpy(tf[1], tf[0], nbytes);
 116                 tf[2] = (uint16 *)_TIFFmalloc(nbytes);
 117                 if (tf[2] == NULL)
 118                         goto bad;
 119                 _TIFFmemcpy(tf[2], tf[0], nbytes);
 120         }
 121         return 1;
 122
 123 bad:
 124         if (tf[0])
 125                 _TIFFfree(tf[0]);
 126         if (tf[1])
 127                 _TIFFfree(tf[1]);
 128         if (tf[2])
 129                 _TIFFfree(tf[2]);
 130         tf[0] = tf[1] = tf[2] = 0;
 131         return 0;
 132 }
 133
 134 static int
 135 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
 136 {
 137         int i;
 138
 139         td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
 140         if (td->td_refblackwhite == NULL)
 141                 return 0;
 142         if (td->td_photometric == PHOTOMETRIC_YCBCR) {
 143                 /*
 144                  * YCbCr (Class Y) images must have the ReferenceBlackWhite
 145                  * tag set. Fix the broken images, which lacks that tag.
 146                  */
 147                 td->td_refblackwhite[0] = 0.0F;
 148                 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
 149                         td->td_refblackwhite[5] = 255.0F;
 150                 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
 151         } else {
 152                 /*
 153                  * Assume RGB (Class R)
 154                  */
 155                 for (i = 0; i < 3; i++) {
 156                     td->td_refblackwhite[2*i+0] = 0;
 157                     td->td_refblackwhite[2*i+1] =
 158                             (float)((1L<<td->td_bitspersample)-1L);
 159                 }
 160         }
 161         return 1;
 162 }
 163
 164 /*
 165  * Like TIFFGetField, but return any default
 166  * value if the tag is not present in the directory.
 167  *
 168  * NB:  We use the value in the directory, rather than
 169  *      explicit values so that defaults exist only one
 170  *      place in the library -- in TIFFDefaultDirectory.
 171  */
 172 int
 173 TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
 174 {
 175         TIFFDirectory *td = &tif->tif_dir;
 176
 177         if (TIFFVGetField(tif, tag, ap))
 178                 return (1);
 179         switch (tag) {
 180         case TIFFTAG_SUBFILETYPE:
 181                 *va_arg(ap, uint32 *) = td->td_subfiletype;
 182                 return (1);
 183         case TIFFTAG_BITSPERSAMPLE:
 184                 *va_arg(ap, uint16 *) = td->td_bitspersample;
 185                 return (1);
 186         case TIFFTAG_THRESHHOLDING:
 187                 *va_arg(ap, uint16 *) = td->td_threshholding;
 188                 return (1);
 189         case TIFFTAG_FILLORDER:
 190                 *va_arg(ap, uint16 *) = td->td_fillorder;
 191                 return (1);
 192         case TIFFTAG_ORIENTATION:
 193                 *va_arg(ap, uint16 *) = td->td_orientation;
 194                 return (1);
 195         case TIFFTAG_SAMPLESPERPIXEL:
 196                 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
 197                 return (1);
 198         case TIFFTAG_ROWSPERSTRIP:
 199                 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
 200                 return (1);
 201         case TIFFTAG_MINSAMPLEVALUE:
 202                 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
 203                 return (1);
 204         case TIFFTAG_MAXSAMPLEVALUE:
 205                 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
 206                 return (1);
 207         case TIFFTAG_PLANARCONFIG:
 208                 *va_arg(ap, uint16 *) = td->td_planarconfig;
 209                 return (1);
 210         case TIFFTAG_RESOLUTIONUNIT:
 211                 *va_arg(ap, uint16 *) = td->td_resolutionunit;
 212                 return (1);
 213         case TIFFTAG_PREDICTOR:
 214     {
 215         TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
 216         if( sp == NULL )
 217         {
 218             TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
 219                          "Cannot get \"Predictor\" tag as plugin is not configured");
 220             *va_arg(ap, uint16*) = 0;
 221             return 0;
 222         }
 223         *va_arg(ap, uint16*) = (uint16) sp->predictor;
 224         return 1;
 225     }
 226         case TIFFTAG_DOTRANGE:
 227                 *va_arg(ap, uint16 *) = 0;
 228                 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
 229                 return (1);
 230         case TIFFTAG_INKSET:
 231                 *va_arg(ap, uint16 *) = INKSET_CMYK;
 232                 return 1;
 233         case TIFFTAG_NUMBEROFINKS:
 234                 *va_arg(ap, uint16 *) = 4;
 235                 return (1);
 236         case TIFFTAG_EXTRASAMPLES:
 237                 *va_arg(ap, uint16 *) = td->td_extrasamples;
 238                 *va_arg(ap, uint16 **) = td->td_sampleinfo;
 239                 return (1);
 240         case TIFFTAG_MATTEING:
 241                 *va_arg(ap, uint16 *) =
 242                     (td->td_extrasamples == 1 &&
 243                      td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
 244                 return (1);
 245         case TIFFTAG_TILEDEPTH:
 246                 *va_arg(ap, uint32 *) = td->td_tiledepth;
 247                 return (1);
 248         case TIFFTAG_DATATYPE:
 249                 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
 250                 return (1);
 251         case TIFFTAG_SAMPLEFORMAT:
 252                 *va_arg(ap, uint16 *) = td->td_sampleformat;
 253                 return(1);
 254         case TIFFTAG_IMAGEDEPTH:
 255                 *va_arg(ap, uint32 *) = td->td_imagedepth;
 256                 return (1);
 257         case TIFFTAG_YCBCRCOEFFICIENTS:
 258                 {
 259                         /* defaults are from CCIR Recommendation 601-1 */
 260                         static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
 261                         *va_arg(ap, float **) = ycbcrcoeffs;
 262                         return 1;
 263                 }
 264         case TIFFTAG_YCBCRSUBSAMPLING:
 265                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
 266                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
 267                 return (1);
 268         case TIFFTAG_YCBCRPOSITIONING:
 269                 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
 270                 return (1);
 271         case TIFFTAG_WHITEPOINT:
 272                 {
 273                         static float whitepoint[2];
 274
 275                         /* TIFF 6.0 specification tells that it is no default
 276                            value for the WhitePoint, but AdobePhotoshop TIFF
 277                            Technical Note tells that it should be CIE D50. */
 278                         whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
 279                         whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
 280                         *va_arg(ap, float **) = whitepoint;
 281                         return 1;
 282                 }
 283         case TIFFTAG_TRANSFERFUNCTION:
 284                 if (!td->td_transferfunction[0] &&
 285                     !TIFFDefaultTransferFunction(td)) {
 286                         TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
 287                         return (0);
 288                 }
 289                 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
 290                 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 291                         *va_arg(ap, uint16 **) = td->td_transferfunction[1];
 292                         *va_arg(ap, uint16 **) = td->td_transferfunction[2];
 293                 }
 294                 return (1);
 295         case TIFFTAG_REFERENCEBLACKWHITE:
 296                 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 297                         return (0);
 298                 *va_arg(ap, float **) = td->td_refblackwhite;
 299                 return (1);
 300         }
 301         return 0;
 302 }
 303
 304 /*
 305  * Like TIFFGetField, but return any default
 306  * value if the tag is not present in the directory.
 307  */
 308 int
 309 TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
 310 {
 311         int ok;
 312         va_list ap;
 313
 314         va_start(ap, tag);
 315         ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
 316         va_end(ap);
 317         return (ok);
 318 }
 319
 320 struct _Int64Parts {
 321         int32 low, high;
 322 };
 323
 324 typedef union {
 325         struct _Int64Parts part;
 326         int64 value;
 327 } _Int64;
 328
 329 float
 330 _TIFFUInt64ToFloat(uint64 ui64)
 331 {
 332         _Int64 i;
 333
 334         i.value = ui64;
 335         if (i.part.high >= 0) {
 336                 return (float)i.value;
 337         } else {
 338                 long double df;
 339                 df = (long double)i.value;
 340                 df += 18446744073709551616.0; /* adding 2**64 */
 341                 return (float)df;
 342         }
 343 }
 344
 345 double
 346 _TIFFUInt64ToDouble(uint64 ui64)
 347 {
 348         _Int64 i;
 349
 350         i.value = ui64;
 351         if (i.part.high >= 0) {
 352                 return (double)i.value;
 353         } else {
 354                 long double df;
 355                 df = (long double)i.value;
 356                 df += 18446744073709551616.0; /* adding 2**64 */
 357                 return (double)df;
 358         }
 359 }
 360
 361 int _TIFFSeekOK(TIFF* tif, toff_t off)
 362 {
 363     /* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
 364     /* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
 365     return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
 366 }
 367
 368 /* vim: set ts=8 sts=8 sw=8 noet: */
 369 /*
 370  * Local Variables:
 371  * mode: c
 372  * c-basic-offset: 8
 373  * fill-column: 78
 374  * End:
 375  */