src/SDL2/external/tiff-4.0.3/libtiff/tif_aux.c

   1 /* $Id: tif_aux.c,v 1.26 2010-07-01 15:33:28 dron 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 #include "tiffiop.h"
  33 #include "tif_predict.h"
  34 #include <math.h>
  35
  36 uint32
  37 _TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
  38 {
  39         uint32 bytes = first * second;
  40
  41         if (second && bytes / second != first) {
  42                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  43                 bytes = 0;
  44         }
  45
  46         return bytes;
  47 }
  48
  49 uint64
  50 _TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
  51 {
  52         uint64 bytes = first * second;
  53
  54         if (second && bytes / second != first) {
  55                 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
  56                 bytes = 0;
  57         }
  58
  59         return bytes;
  60 }
  61
  62 void*
  63 _TIFFCheckRealloc(TIFF* tif, void* buffer,
  64                   tmsize_t nmemb, tmsize_t elem_size, const char* what)
  65 {
  66         void* cp = NULL;
  67         tmsize_t bytes = nmemb * elem_size;
  68
  69         /*
  70          * XXX: Check for integer overflow.
  71          */
  72         if (nmemb && elem_size && bytes / elem_size == nmemb)
  73                 cp = _TIFFrealloc(buffer, bytes);
  74
  75         if (cp == NULL) {
  76                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
  77                              "Failed to allocate memory for %s "
  78                              "(%ld elements of %ld bytes each)",
  79                              what,(long) nmemb, (long) elem_size);
  80         }
  81
  82         return cp;
  83 }
  84
  85 void*
  86 _TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
  87 {
  88         return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
  89 }
  90
  91 static int
  92 TIFFDefaultTransferFunction(TIFFDirectory* td)
  93 {
  94         uint16 **tf = td->td_transferfunction;
  95         tmsize_t i, n, nbytes;
  96
  97         tf[0] = tf[1] = tf[2] = 0;
  98         if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
  99                 return 0;
 100
 101         n = ((tmsize_t)1)<<td->td_bitspersample;
 102         nbytes = n * sizeof (uint16);
 103         if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes)))
 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                 if (!(tf[1] = (uint16 *)_TIFFmalloc(nbytes)))
 113                         goto bad;
 114                 _TIFFmemcpy(tf[1], tf[0], nbytes);
 115                 if (!(tf[2] = (uint16 *)_TIFFmalloc(nbytes)))
 116                         goto bad;
 117                 _TIFFmemcpy(tf[2], tf[0], nbytes);
 118         }
 119         return 1;
 120
 121 bad:
 122         if (tf[0])
 123                 _TIFFfree(tf[0]);
 124         if (tf[1])
 125                 _TIFFfree(tf[1]);
 126         if (tf[2])
 127                 _TIFFfree(tf[2]);
 128         tf[0] = tf[1] = tf[2] = 0;
 129         return 0;
 130 }
 131
 132 static int
 133 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
 134 {
 135         int i;
 136
 137         if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
 138                 return 0;
 139         if (td->td_photometric == PHOTOMETRIC_YCBCR) {
 140                 /*
 141                  * YCbCr (Class Y) images must have the ReferenceBlackWhite
 142                  * tag set. Fix the broken images, which lacks that tag.
 143                  */
 144                 td->td_refblackwhite[0] = 0.0F;
 145                 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
 146                         td->td_refblackwhite[5] = 255.0F;
 147                 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
 148         } else {
 149                 /*
 150                  * Assume RGB (Class R)
 151                  */
 152                 for (i = 0; i < 3; i++) {
 153                     td->td_refblackwhite[2*i+0] = 0;
 154                     td->td_refblackwhite[2*i+1] =
 155                             (float)((1L<<td->td_bitspersample)-1L);
 156                 }
 157         }
 158         return 1;
 159 }
 160
 161 /*
 162  * Like TIFFGetField, but return any default
 163  * value if the tag is not present in the directory.
 164  *
 165  * NB:  We use the value in the directory, rather than
 166  *      explcit values so that defaults exist only one
 167  *      place in the library -- in TIFFDefaultDirectory.
 168  */
 169 int
 170 TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
 171 {
 172         TIFFDirectory *td = &tif->tif_dir;
 173
 174         if (TIFFVGetField(tif, tag, ap))
 175                 return (1);
 176         switch (tag) {
 177         case TIFFTAG_SUBFILETYPE:
 178                 *va_arg(ap, uint32 *) = td->td_subfiletype;
 179                 return (1);
 180         case TIFFTAG_BITSPERSAMPLE:
 181                 *va_arg(ap, uint16 *) = td->td_bitspersample;
 182                 return (1);
 183         case TIFFTAG_THRESHHOLDING:
 184                 *va_arg(ap, uint16 *) = td->td_threshholding;
 185                 return (1);
 186         case TIFFTAG_FILLORDER:
 187                 *va_arg(ap, uint16 *) = td->td_fillorder;
 188                 return (1);
 189         case TIFFTAG_ORIENTATION:
 190                 *va_arg(ap, uint16 *) = td->td_orientation;
 191                 return (1);
 192         case TIFFTAG_SAMPLESPERPIXEL:
 193                 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
 194                 return (1);
 195         case TIFFTAG_ROWSPERSTRIP:
 196                 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
 197                 return (1);
 198         case TIFFTAG_MINSAMPLEVALUE:
 199                 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
 200                 return (1);
 201         case TIFFTAG_MAXSAMPLEVALUE:
 202                 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
 203                 return (1);
 204         case TIFFTAG_PLANARCONFIG:
 205                 *va_arg(ap, uint16 *) = td->td_planarconfig;
 206                 return (1);
 207         case TIFFTAG_RESOLUTIONUNIT:
 208                 *va_arg(ap, uint16 *) = td->td_resolutionunit;
 209                 return (1);
 210         case TIFFTAG_PREDICTOR:
 211                 {
 212                         TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
 213                         *va_arg(ap, uint16*) = (uint16) sp->predictor;
 214                         return 1;
 215                 }
 216         case TIFFTAG_DOTRANGE:
 217                 *va_arg(ap, uint16 *) = 0;
 218                 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
 219                 return (1);
 220         case TIFFTAG_INKSET:
 221                 *va_arg(ap, uint16 *) = INKSET_CMYK;
 222                 return 1;
 223         case TIFFTAG_NUMBEROFINKS:
 224                 *va_arg(ap, uint16 *) = 4;
 225                 return (1);
 226         case TIFFTAG_EXTRASAMPLES:
 227                 *va_arg(ap, uint16 *) = td->td_extrasamples;
 228                 *va_arg(ap, uint16 **) = td->td_sampleinfo;
 229                 return (1);
 230         case TIFFTAG_MATTEING:
 231                 *va_arg(ap, uint16 *) =
 232                     (td->td_extrasamples == 1 &&
 233                      td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
 234                 return (1);
 235         case TIFFTAG_TILEDEPTH:
 236                 *va_arg(ap, uint32 *) = td->td_tiledepth;
 237                 return (1);
 238         case TIFFTAG_DATATYPE:
 239                 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
 240                 return (1);
 241         case TIFFTAG_SAMPLEFORMAT:
 242                 *va_arg(ap, uint16 *) = td->td_sampleformat;
 243                 return(1);
 244         case TIFFTAG_IMAGEDEPTH:
 245                 *va_arg(ap, uint32 *) = td->td_imagedepth;
 246                 return (1);
 247         case TIFFTAG_YCBCRCOEFFICIENTS:
 248                 {
 249                         /* defaults are from CCIR Recommendation 601-1 */
 250                         static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
 251                         *va_arg(ap, float **) = ycbcrcoeffs;
 252                         return 1;
 253                 }
 254         case TIFFTAG_YCBCRSUBSAMPLING:
 255                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
 256                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
 257                 return (1);
 258         case TIFFTAG_YCBCRPOSITIONING:
 259                 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
 260                 return (1);
 261         case TIFFTAG_WHITEPOINT:
 262                 {
 263                         static float whitepoint[2];
 264
 265                         /* TIFF 6.0 specification tells that it is no default
 266                            value for the WhitePoint, but AdobePhotoshop TIFF
 267                            Technical Note tells that it should be CIE D50. */
 268                         whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
 269                         whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
 270                         *va_arg(ap, float **) = whitepoint;
 271                         return 1;
 272                 }
 273         case TIFFTAG_TRANSFERFUNCTION:
 274                 if (!td->td_transferfunction[0] &&
 275                     !TIFFDefaultTransferFunction(td)) {
 276                         TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
 277                         return (0);
 278                 }
 279                 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
 280                 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 281                         *va_arg(ap, uint16 **) = td->td_transferfunction[1];
 282                         *va_arg(ap, uint16 **) = td->td_transferfunction[2];
 283                 }
 284                 return (1);
 285         case TIFFTAG_REFERENCEBLACKWHITE:
 286                 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 287                         return (0);
 288                 *va_arg(ap, float **) = td->td_refblackwhite;
 289                 return (1);
 290         }
 291         return 0;
 292 }
 293
 294 /*
 295  * Like TIFFGetField, but return any default
 296  * value if the tag is not present in the directory.
 297  */
 298 int
 299 TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
 300 {
 301         int ok;
 302         va_list ap;
 303
 304         va_start(ap, tag);
 305         ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
 306         va_end(ap);
 307         return (ok);
 308 }
 309
 310 struct _Int64Parts {
 311         int32 low, high;
 312 };
 313
 314 typedef union {
 315         struct _Int64Parts part;
 316         int64 value;
 317 } _Int64;
 318
 319 float
 320 _TIFFUInt64ToFloat(uint64 ui64)
 321 {
 322         _Int64 i;
 323
 324         i.value = ui64;
 325         if (i.part.high >= 0) {
 326                 return (float)i.value;
 327         } else {
 328                 long double df;
 329                 df = (long double)i.value;
 330                 df += 18446744073709551616.0; /* adding 2**64 */
 331                 return (float)df;
 332         }
 333 }
 334
 335 double
 336 _TIFFUInt64ToDouble(uint64 ui64)
 337 {
 338         _Int64 i;
 339
 340         i.value = ui64;
 341         if (i.part.high >= 0) {
 342                 return (double)i.value;
 343         } else {
 344                 long double df;
 345                 df = (long double)i.value;
 346                 df += 18446744073709551616.0; /* adding 2**64 */
 347                 return (double)df;
 348         }
 349 }
 350
 351 /* vim: set ts=8 sts=8 sw=8 noet: */
 352 /*
 353  * Local Variables:
 354  * mode: c
 355  * c-basic-offset: 8
 356  * fill-column: 78
 357  * End:
 358  */