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