| 1 | /* $Header$ */ |
| 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 | for (i = 0; i < 3; i++) { |
| 85 | td->td_refblackwhite[2*i+0] = 0; |
| 86 | td->td_refblackwhite[2*i+1] = (float)((1L<<td->td_bitspersample)-1L); |
| 87 | } |
| 88 | return 1; |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Like TIFFGetField, but return any default |
| 93 | * value if the tag is not present in the directory. |
| 94 | * |
| 95 | * NB: We use the value in the directory, rather than |
| 96 | * explcit values so that defaults exist only one |
| 97 | * place in the library -- in TIFFDefaultDirectory. |
| 98 | */ |
| 99 | int |
| 100 | TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list ap) |
| 101 | { |
| 102 | TIFFDirectory *td = &tif->tif_dir; |
| 103 | |
| 104 | if (TIFFVGetField(tif, tag, ap)) |
| 105 | return (1); |
| 106 | switch (tag) { |
| 107 | case TIFFTAG_SUBFILETYPE: |
| 108 | *va_arg(ap, uint32 *) = td->td_subfiletype; |
| 109 | return (1); |
| 110 | case TIFFTAG_BITSPERSAMPLE: |
| 111 | *va_arg(ap, uint16 *) = td->td_bitspersample; |
| 112 | return (1); |
| 113 | case TIFFTAG_THRESHHOLDING: |
| 114 | *va_arg(ap, uint16 *) = td->td_threshholding; |
| 115 | return (1); |
| 116 | case TIFFTAG_FILLORDER: |
| 117 | *va_arg(ap, uint16 *) = td->td_fillorder; |
| 118 | return (1); |
| 119 | case TIFFTAG_ORIENTATION: |
| 120 | *va_arg(ap, uint16 *) = td->td_orientation; |
| 121 | return (1); |
| 122 | case TIFFTAG_SAMPLESPERPIXEL: |
| 123 | *va_arg(ap, uint16 *) = td->td_samplesperpixel; |
| 124 | return (1); |
| 125 | case TIFFTAG_ROWSPERSTRIP: |
| 126 | *va_arg(ap, uint32 *) = td->td_rowsperstrip; |
| 127 | return (1); |
| 128 | case TIFFTAG_MINSAMPLEVALUE: |
| 129 | *va_arg(ap, uint16 *) = td->td_minsamplevalue; |
| 130 | return (1); |
| 131 | case TIFFTAG_MAXSAMPLEVALUE: |
| 132 | *va_arg(ap, uint16 *) = td->td_maxsamplevalue; |
| 133 | return (1); |
| 134 | case TIFFTAG_PLANARCONFIG: |
| 135 | *va_arg(ap, uint16 *) = td->td_planarconfig; |
| 136 | return (1); |
| 137 | case TIFFTAG_RESOLUTIONUNIT: |
| 138 | *va_arg(ap, uint16 *) = td->td_resolutionunit; |
| 139 | return (1); |
| 140 | case TIFFTAG_PREDICTOR: |
| 141 | { |
| 142 | TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data; |
| 143 | *va_arg(ap, uint16*) = (uint16) sp->predictor; |
| 144 | return (1); |
| 145 | } |
| 146 | case TIFFTAG_DOTRANGE: |
| 147 | *va_arg(ap, uint16 *) = 0; |
| 148 | *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1; |
| 149 | return (1); |
| 150 | case TIFFTAG_INKSET: |
| 151 | *va_arg(ap, uint16 *) = td->td_inkset; |
| 152 | return (1); |
| 153 | case TIFFTAG_NUMBEROFINKS: |
| 154 | *va_arg(ap, uint16 *) = td->td_ninks; |
| 155 | return (1); |
| 156 | case TIFFTAG_EXTRASAMPLES: |
| 157 | *va_arg(ap, uint16 *) = td->td_extrasamples; |
| 158 | *va_arg(ap, uint16 **) = td->td_sampleinfo; |
| 159 | return (1); |
| 160 | case TIFFTAG_MATTEING: |
| 161 | *va_arg(ap, uint16 *) = |
| 162 | (td->td_extrasamples == 1 && |
| 163 | td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA); |
| 164 | return (1); |
| 165 | case TIFFTAG_TILEDEPTH: |
| 166 | *va_arg(ap, uint32 *) = td->td_tiledepth; |
| 167 | return (1); |
| 168 | case TIFFTAG_DATATYPE: |
| 169 | *va_arg(ap, uint16 *) = td->td_sampleformat-1; |
| 170 | return (1); |
| 171 | case TIFFTAG_SAMPLEFORMAT: |
| 172 | *va_arg(ap, uint16 *) = td->td_sampleformat; |
| 173 | return(1); |
| 174 | case TIFFTAG_IMAGEDEPTH: |
| 175 | *va_arg(ap, uint32 *) = td->td_imagedepth; |
| 176 | return (1); |
| 177 | case TIFFTAG_YCBCRCOEFFICIENTS: |
| 178 | if (!td->td_ycbcrcoeffs) { |
| 179 | td->td_ycbcrcoeffs = (float *) |
| 180 | _TIFFmalloc(3*sizeof (float)); |
| 181 | if (!td->td_ycbcrcoeffs) |
| 182 | return (0); |
| 183 | /* defaults are from CCIR Recommendation 601-1 */ |
| 184 | td->td_ycbcrcoeffs[0] = 0.299f; |
| 185 | td->td_ycbcrcoeffs[1] = 0.587f; |
| 186 | td->td_ycbcrcoeffs[2] = 0.114f; |
| 187 | } |
| 188 | *va_arg(ap, float **) = td->td_ycbcrcoeffs; |
| 189 | return (1); |
| 190 | case TIFFTAG_YCBCRSUBSAMPLING: |
| 191 | *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0]; |
| 192 | *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1]; |
| 193 | return (1); |
| 194 | case TIFFTAG_YCBCRPOSITIONING: |
| 195 | *va_arg(ap, uint16 *) = td->td_ycbcrpositioning; |
| 196 | return (1); |
| 197 | case TIFFTAG_WHITEPOINT: |
| 198 | if (!td->td_whitepoint) { |
| 199 | td->td_whitepoint = (float *) |
| 200 | _TIFFmalloc(2 * sizeof (float)); |
| 201 | if (!td->td_whitepoint) |
| 202 | return (0); |
| 203 | /* TIFF 6.0 specification says that it is no default |
| 204 | value for the WhitePoint, but AdobePhotoshop TIFF |
| 205 | Technical Note tells that it should be CIE D50. */ |
| 206 | td->td_whitepoint[0] = |
| 207 | D50_X0 / (D50_X0 + D50_Y0 + D50_Z0); |
| 208 | td->td_whitepoint[1] = |
| 209 | D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0); |
| 210 | } |
| 211 | *va_arg(ap, float **) = td->td_whitepoint; |
| 212 | return (1); |
| 213 | case TIFFTAG_TRANSFERFUNCTION: |
| 214 | if (!td->td_transferfunction[0] && |
| 215 | !TIFFDefaultTransferFunction(td)) { |
| 216 | TIFFError(tif->tif_name, "No space for \"TransferFunction\" tag"); |
| 217 | return (0); |
| 218 | } |
| 219 | *va_arg(ap, uint16 **) = td->td_transferfunction[0]; |
| 220 | if (td->td_samplesperpixel - td->td_extrasamples > 1) { |
| 221 | *va_arg(ap, uint16 **) = td->td_transferfunction[1]; |
| 222 | *va_arg(ap, uint16 **) = td->td_transferfunction[2]; |
| 223 | } |
| 224 | return (1); |
| 225 | case TIFFTAG_REFERENCEBLACKWHITE: |
| 226 | if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td)) |
| 227 | return (0); |
| 228 | *va_arg(ap, float **) = td->td_refblackwhite; |
| 229 | return (1); |
| 230 | } |
| 231 | return (0); |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Like TIFFGetField, but return any default |
| 236 | * value if the tag is not present in the directory. |
| 237 | */ |
| 238 | int |
| 239 | TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...) |
| 240 | { |
| 241 | int ok; |
| 242 | va_list ap; |
| 243 | |
| 244 | va_start(ap, tag); |
| 245 | ok = TIFFVGetFieldDefaulted(tif, tag, ap); |
| 246 | va_end(ap); |
| 247 | return (ok); |
| 248 | } |