git.maemo.org Git - opencv/blob - 3rdparty/libtiff/tif_aux.c

   1 /* $Id: tif_aux.c,v 1.1 2005-06-17 13:54:52 vp153 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 static int
  37 TIFFDefaultTransferFunction(TIFFDirectory* td)
  38 {
  39         uint16 **tf = td->td_transferfunction;
  40         tsize_t i, n, nbytes;
  41
  42         tf[0] = tf[1] = tf[2] = 0;
  43         if (td->td_bitspersample >= sizeof(tsize_t) * 8 - 2)
  44                 return 0;
  45
  46         n = 1<<td->td_bitspersample;
  47         nbytes = n * sizeof (uint16);
  48         if (!(tf[0] = (uint16 *)_TIFFmalloc(nbytes)))
  49                 return 0;
  50         tf[0][0] = 0;
  51         for (i = 1; i < n; i++) {
  52                 double t = (double)i/((double) n-1.);
  53                 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
  54         }
  55
  56         if (td->td_samplesperpixel - td->td_extrasamples > 1) {
  57                 if (!(tf[1] = (uint16 *)_TIFFmalloc(nbytes)))
  58                         goto bad;
  59                 _TIFFmemcpy(tf[1], tf[0], nbytes);
  60                 if (!(tf[2] = (uint16 *)_TIFFmalloc(nbytes)))
  61                         goto bad;
  62                 _TIFFmemcpy(tf[2], tf[0], nbytes);
  63         }
  64         return 1;
  65
  66 bad:
  67         if (tf[0])
  68                 _TIFFfree(tf[0]);
  69         if (tf[1])
  70                 _TIFFfree(tf[1]);
  71         if (tf[2])
  72                 _TIFFfree(tf[2]);
  73         tf[0] = tf[1] = tf[2] = 0;
  74         return 0;
  75 }
  76
  77 static int
  78 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
  79 {
  80         int i;
  81
  82         if (!(td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float))))
  83                 return 0;
  84         if (td->td_photometric == PHOTOMETRIC_YCBCR) {
  85                 /*
  86                  * YCbCr (Class Y) images must have the ReferenceBlackWhite
  87                  * tag set. Fix the broken images, which lacks that tag.
  88                  */
  89                 td->td_refblackwhite[0] = 0.0F;
  90                 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
  91                         td->td_refblackwhite[5] = 255.0F;
  92                 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
  93         } else {
  94                 /*
  95                  * Assume RGB (Class R)
  96                  */
  97                 for (i = 0; i < 3; i++) {
  98                     td->td_refblackwhite[2*i+0] = 0;
  99                     td->td_refblackwhite[2*i+1] =
 100                             (float)((1L<<td->td_bitspersample)-1L);
 101                 }
 102         }
 103         return 1;
 104 }
 105
 106 /*
 107  * Like TIFFGetField, but return any default
 108  * value if the tag is not present in the directory.
 109  *
 110  * NB:  We use the value in the directory, rather than
 111  *      explcit values so that defaults exist only one
 112  *      place in the library -- in TIFFDefaultDirectory.
 113  */
 114 int
 115 TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap)
 116 {
 117         TIFFDirectory *td = &tif->tif_dir;
 118
 119         if (TIFFVGetField(tif, tag, ap))
 120                 return (1);
 121         switch (tag) {
 122         case TIFFTAG_SUBFILETYPE:
 123                 *va_arg(ap, uint32 *) = td->td_subfiletype;
 124                 return (1);
 125         case TIFFTAG_BITSPERSAMPLE:
 126                 *va_arg(ap, uint16 *) = td->td_bitspersample;
 127                 return (1);
 128         case TIFFTAG_THRESHHOLDING:
 129                 *va_arg(ap, uint16 *) = td->td_threshholding;
 130                 return (1);
 131         case TIFFTAG_FILLORDER:
 132                 *va_arg(ap, uint16 *) = td->td_fillorder;
 133                 return (1);
 134         case TIFFTAG_ORIENTATION:
 135                 *va_arg(ap, uint16 *) = td->td_orientation;
 136                 return (1);
 137         case TIFFTAG_SAMPLESPERPIXEL:
 138                 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
 139                 return (1);
 140         case TIFFTAG_ROWSPERSTRIP:
 141                 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
 142                 return (1);
 143         case TIFFTAG_MINSAMPLEVALUE:
 144                 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
 145                 return (1);
 146         case TIFFTAG_MAXSAMPLEVALUE:
 147                 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
 148                 return (1);
 149         case TIFFTAG_PLANARCONFIG:
 150                 *va_arg(ap, uint16 *) = td->td_planarconfig;
 151                 return (1);
 152         case TIFFTAG_RESOLUTIONUNIT:
 153                 *va_arg(ap, uint16 *) = td->td_resolutionunit;
 154                 return (1);
 155         case TIFFTAG_PREDICTOR:
 156                 {
 157                         TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
 158                         *va_arg(ap, uint16*) = (uint16) sp->predictor;
 159                         return (1);
 160                 }
 161         case TIFFTAG_DOTRANGE:
 162                 *va_arg(ap, uint16 *) = 0;
 163                 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
 164                 return (1);
 165         case TIFFTAG_INKSET:
 166                 *va_arg(ap, uint16 *) = td->td_inkset;
 167                 return (1);
 168         case TIFFTAG_NUMBEROFINKS:
 169                 *va_arg(ap, uint16 *) = td->td_ninks;
 170                 return (1);
 171         case TIFFTAG_EXTRASAMPLES:
 172                 *va_arg(ap, uint16 *) = td->td_extrasamples;
 173                 *va_arg(ap, uint16 **) = td->td_sampleinfo;
 174                 return (1);
 175         case TIFFTAG_MATTEING:
 176                 *va_arg(ap, uint16 *) =
 177                     (td->td_extrasamples == 1 &&
 178                      td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
 179                 return (1);
 180         case TIFFTAG_TILEDEPTH:
 181                 *va_arg(ap, uint32 *) = td->td_tiledepth;
 182                 return (1);
 183         case TIFFTAG_DATATYPE:
 184                 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
 185                 return (1);
 186         case TIFFTAG_SAMPLEFORMAT:
 187                 *va_arg(ap, uint16 *) = td->td_sampleformat;
 188                 return(1);
 189         case TIFFTAG_IMAGEDEPTH:
 190                 *va_arg(ap, uint32 *) = td->td_imagedepth;
 191                 return (1);
 192         case TIFFTAG_YCBCRCOEFFICIENTS:
 193                 if (!td->td_ycbcrcoeffs) {
 194                         td->td_ycbcrcoeffs = (float *)
 195                             _TIFFmalloc(3*sizeof (float));
 196                         if (!td->td_ycbcrcoeffs)
 197                                 return (0);
 198                         /* defaults are from CCIR Recommendation 601-1 */
 199                         td->td_ycbcrcoeffs[0] = 0.299f;
 200                         td->td_ycbcrcoeffs[1] = 0.587f;
 201                         td->td_ycbcrcoeffs[2] = 0.114f;
 202                 }
 203                 *va_arg(ap, float **) = td->td_ycbcrcoeffs;
 204                 return (1);
 205         case TIFFTAG_YCBCRSUBSAMPLING:
 206                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
 207                 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
 208                 return (1);
 209         case TIFFTAG_YCBCRPOSITIONING:
 210                 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
 211                 return (1);
 212         case TIFFTAG_WHITEPOINT:
 213                 if (!td->td_whitepoint) {
 214                         td->td_whitepoint = (float *)
 215                                 _TIFFmalloc(2 * sizeof (float));
 216                         if (!td->td_whitepoint)
 217                                 return (0);
 218                         /* TIFF 6.0 specification says that it is no default
 219                            value for the WhitePoint, but AdobePhotoshop TIFF
 220                            Technical Note tells that it should be CIE D50. */
 221                         td->td_whitepoint[0] =
 222                                 D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
 223                         td->td_whitepoint[1] =
 224                                 D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
 225                 }
 226                 *va_arg(ap, float **) = td->td_whitepoint;
 227                 return (1);
 228         case TIFFTAG_TRANSFERFUNCTION:
 229                 if (!td->td_transferfunction[0] &&
 230                     !TIFFDefaultTransferFunction(td)) {
 231                         TIFFError(tif->tif_name, "No space for \"TransferFunction\" tag");
 232                         return (0);
 233                 }
 234                 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
 235                 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
 236                         *va_arg(ap, uint16 **) = td->td_transferfunction[1];
 237                         *va_arg(ap, uint16 **) = td->td_transferfunction[2];
 238                 }
 239                 return (1);
 240         case TIFFTAG_REFERENCEBLACKWHITE:
 241                 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
 242                         return (0);
 243                 *va_arg(ap, float **) = td->td_refblackwhite;
 244                 return (1);
 245         }
 246         return (0);
 247 }
 248
 249 /*
 250  * Like TIFFGetField, but return any default
 251  * value if the tag is not present in the directory.
 252  */
 253 int
 254 TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
 255 {
 256         int ok;
 257         va_list ap;
 258
 259         va_start(ap, tag);
 260         ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
 261         va_end(ap);
 262         return (ok);
 263 }
 264
 265 /* vim: set ts=8 sts=8 sw=8 noet: */