src/tiff/libtiff/tif_aux.c

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