thirdparty/libtiff/tif_aux.c

   1 /* $Id: tif_aux.c,v 1.20.2.3 2010-06-09 21:15:27 bfriesen 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 tdata_t
  37 _TIFFCheckRealloc(TIFF* tif, tdata_t buffer,
  38                   size_t nmemb, size_t elem_size, const char* what)
  39 {
  40         tdata_t cp = NULL;
  41         tsize_t bytes = nmemb * elem_size;
  42
  43         /*
  44          * XXX: Check for integer overflow.
  45          */
  46         if (nmemb && elem_size && bytes / elem_size == nmemb)
  47                 cp = _TIFFrealloc(buffer, bytes);
  48
  49         if (cp == NULL)
  50                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
  51                              "Failed to allocate memory for %s "
  52                              "(%ld elements of %ld bytes each)",
  53                              what,(long) nmemb, (long) elem_size);
  54
  55         return cp;
  56 }
  57
  58 tdata_t
  59 _TIFFCheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what)
  60 {
  61         return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
  62 }
  63
  64 static int
  65 TIFFDefaultTransferFunction(TIFFDirectory* td)
  66 {
  67         uint16 **tf = td->td_transferfunction;
  68         tsize_t i, n, nbytes;
  69
  70         tf[0] = tf[1] = tf[2] = 0;
  71         if (td->td_bitspersample >= sizeof(tsize_t) * 8 - 2)
  72                 return 0;
  73
  74         n = 1<<td->td_bitspersample;
  75         nbytes = n * sizeof (uint16);
  76         if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes)))
  77                 return 0;
  78         tf[0][0] = 0;
  79         for (i = 1; i < n; i++) {
  80                 double t = (double)i/((double) n-1.);
  81                 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
  82         }
  83
  84         if (td->td_samplesperpixel - td->td_extrasamples > 1) {
  85                 if (!(tf[1] = (uint16 *)_TIFFmalloc(nbytes)))
  86                         goto bad;
  87                 _TIFFmemcpy(tf[1], tf[0], nbytes);
  88                 if (!(tf[2] = (uint16 *)_TIFFmalloc(nbytes)))
  89                         goto bad;
  90                 _TIFFmemcpy(tf[2], tf[0], nbytes);
  91         }
  92         return 1;
  93
  94 bad:
  95         if (tf[0])
  96                 _TIFFfree(tf[0]);
  97         if (tf[1])
  98                 _TIFFfree(tf[1]);
  99         if (tf[2])
 100                 _TIFFfree(tf[2]);
 101         tf[0] = tf[1] = tf[2] = 0;
 102         return 0;
 103 }
 104
 105 static int
 106 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
 107 {
 108         int i;
 109
 110         if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
 111                 return 0;
 112         if (td->td_photometric == PHOTOMETRIC_YCBCR) {
 113                 /*
 114                  * YCbCr (Class Y) images must have the ReferenceBlackWhite
 115                  * tag set. Fix the broken images, which lacks that tag.
 116                  */
 117                 td->td_refblackwhite[0] = 0.0F;
 118                 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
 119                         td->td_refblackwhite[5] = 255.0F;
 120                 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
 121         } else {
 122                 /*
 123                  * Assume RGB (Class R)
 124                  */
 125                 for (i = 0; i < 3; i++) {
 126                     td->td_refblackwhite[2*i+0] = 0;
 127                     td->td_refblackwhite[2*i+1] =
 128                             (float)((1L<<td->td_bitspersample)-1L);
 129                 }
 130         }
 131         return 1;
 132 }
 133
 134 /*
 135  * Like TIFFGetField, but return any default
 136  * value if the tag is not present in the directory.
 137  *
 138  * NB:  We use the value in the directory, rather than
 139  *      explcit values so that defaults exist only one
 140  *      place in the library -- in TIFFDefaultDirectory.
 141  */
 142 int
 143 TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)
 144 {
 145         TIFFDirectory *td = &tif->tif_dir;
 146
 147         if (TIFFVGetField(tif, tag, ap))
 148                 return (1);
 149         switch (tag) {
 150         case TIFFTAG_SUBFILETYPE:
 151                 *va_arg(ap, uint32 *) = td->td_subfiletype;
 152                 return (1);
 153         case TIFFTAG_BITSPERSAMPLE:
 154                 *va_arg(ap, uint16 *) = td->td_bitspersample;
 155                 return (1);
 156         case TIFFTAG_THRESHHOLDING:
 157                 *va_arg(ap, uint16 *) = td->td_threshholding;
 158                 return (1);
 159         case TIFFTAG_FILLORDER:
 160                 *va_arg(ap, uint16 *) = td->td_fillorder;
 161                 return (1);
 162         case TIFFTAG_ORIENTATION:
 163                 *va_arg(ap, uint16 *) = td->td_orientation;
 164                 return (1);
 165         case TIFFTAG_SAMPLESPERPIXEL:
 166                 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
 167                 return (1);
 168         case TIFFTAG_ROWSPERSTRIP:
 169                 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
 170                 return (1);
 171         case TIFFTAG_MINSAMPLEVALUE:
 172                 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
 173                 return (1);
 174         case TIFFTAG_MAXSAMPLEVALUE:
 175                 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
 176                 return (1);
 177         case TIFFTAG_PLANARCONFIG:
 178                 *va_arg(ap, uint16 *) = td->td_planarconfig;
 179                 return (1);
 180         case TIFFTAG_RESOLUTIONUNIT:
 181                 *va_arg(ap, uint16 *) = td->td_resolutionunit;
 182                 return (1);
 183         case TIFFTAG_PREDICTOR:
 184                 {
 185                         TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
 186                         *va_arg(ap, uint16*) = (uint16) sp->predictor;
 187                         return 1;
 188                 }
 189         case TIFFTAG_DOTRANGE:
 190                 *va_arg(ap, uint16 *) = 0;
 191                 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
 192                 return (1);
 193         case TIFFTAG_INKSET:
 194                 *va_arg(ap, uint16 *) = INKSET_CMYK;
 195                 return 1;
 196         case TIFFTAG_NUMBEROFINKS:
 197                 *va_arg(ap, uint16 *) = 4;
 198                 return (1);
 199         case TIFFTAG_EXTRASAMPLES:
 200                 *va_arg(ap, uint16 *) = td->td_extrasamples;
 201                 *va_arg(ap, uint16 **) = td->td_sampleinfo;
 202                 return (1);
 203         case TIFFTAG_MATTEING:
 204                 *va_arg(ap, uint16 *) =
 205                     (td->td_extrasamples == 1 &&
 206                      td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
 207                 return (1);
 208         case TIFFTAG_TILEDEPTH:
 209                 *va_arg(ap, uint32 *) = td->td_tiledepth;
 210                 return (1);
 211         case TIFFTAG_DATATYPE:
 212                 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
 213                 return (1);
 214         case TIFFTAG_SAMPLEFORMAT:
 215                 *va_arg(ap, uint16 *) = td->td_sampleformat;
 216                 return(1);
 217         case TIFFTAG_IMAGEDEPTH:
 218                 *va_arg(ap, uint32 *) = td->td_imagedepth;
 219                 return (1);
 220         case TIFFTAG_YCBCRCOEFFICIENTS:
 221                 {
 222                         /* defaults are from CCIR Recommendation 601-1 */
 223                         static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
 224                         *va_arg(ap, float **) = ycbcrcoeffs;
 225                         return 1;
 226                 }
 227         case TIFFTAG_YCBCRSUBSAMPLING:
 228                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
 229                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
 230                 return (1);
 231         case TIFFTAG_YCBCRPOSITIONING:
 232                 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
 233                 return (1);
 234         case TIFFTAG_WHITEPOINT:
 235                 {
 236                         static float whitepoint[2];
 237
 238                         /* TIFF 6.0 specification tells that it is no default
 239                            value for the WhitePoint, but AdobePhotoshop TIFF
 240                            Technical Note tells that it should be CIE D50. */
 241                         whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
 242                         whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
 243                         *va_arg(ap, float **) = whitepoint;
 244                         return 1;
 245                 }
 246         case TIFFTAG_TRANSFERFUNCTION:
 247                 if (!td->td_transferfunction[0] &&
 248                     !TIFFDefaultTransferFunction(td)) {
 249                         TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
 250                         return (0);
 251                 }
 252                 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
 253                 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 254                         *va_arg(ap, uint16 **) = td->td_transferfunction[1];
 255                         *va_arg(ap, uint16 **) = td->td_transferfunction[2];
 256                 }
 257                 return (1);
 258         case TIFFTAG_REFERENCEBLACKWHITE:
 259                 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 260                         return (0);
 261                 *va_arg(ap, float **) = td->td_refblackwhite;
 262                 return (1);
 263         }
 264         return 0;
 265 }
 266
 267 /*
 268  * Like TIFFGetField, but return any default
 269  * value if the tag is not present in the directory.
 270  */
 271 int
 272 TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
 273 {
 274         int ok;
 275         va_list ap;
 276
 277         va_start(ap, tag);
 278         ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
 279         va_end(ap);
 280         return (ok);
 281 }
 282
 283 /* vim: set ts=8 sts=8 sw=8 noet: */
 284 /*
 285  * Local Variables:
 286  * mode: c
 287  * c-basic-offset: 8
 288  * fill-column: 78
 289  * End:
 290  */