1 /* $Id: tif_aux.c,v 1.19 2006/02/07 10:41:30 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 tdata_t
_TIFFCheckMalloc(TIFF * tif,size_t nmemb,size_t elem_size,const char * what)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
TIFFDefaultTransferFunction(TIFFDirectory * td)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
TIFFVGetFieldDefaulted(TIFF * tif,ttag_t tag,va_list ap)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
TIFFGetFieldDefaulted(TIFF * tif,ttag_t tag,...)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: */
268