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 uint32
_TIFFMultiply32(TIFF * tif,uint32 first,uint32 second,const char * where)37 _TIFFMultiply32(TIFF* tif, uint32 first, uint32 second, const char* where)
38 {
39 uint32 bytes = first * second;
40
41 if (second && bytes / second != first) {
42 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
43 bytes = 0;
44 }
45
46 return bytes;
47 }
48
49 uint64
_TIFFMultiply64(TIFF * tif,uint64 first,uint64 second,const char * where)50 _TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
51 {
52 uint64 bytes = first * second;
53
54 if (second && bytes / second != first) {
55 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
56 bytes = 0;
57 }
58
59 return bytes;
60 }
61
62 void*
_TIFFCheckRealloc(TIFF * tif,void * buffer,tmsize_t nmemb,tmsize_t elem_size,const char * what)63 _TIFFCheckRealloc(TIFF* tif, void* buffer,
64 tmsize_t nmemb, tmsize_t elem_size, const char* what)
65 {
66 void* cp = NULL;
67 tmsize_t bytes = nmemb * elem_size;
68
69 /*
70 * XXX: Check for integer overflow.
71 */
72 if (nmemb && elem_size && bytes / elem_size == nmemb)
73 cp = _TIFFrealloc(buffer, bytes);
74
75 if (cp == NULL) {
76 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
77 "Failed to allocate memory for %s "
78 "(%ld elements of %ld bytes each)",
79 what,(long) nmemb, (long) elem_size);
80 }
81
82 return cp;
83 }
84
85 void*
_TIFFCheckMalloc(TIFF * tif,tmsize_t nmemb,tmsize_t elem_size,const char * what)86 _TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
87 {
88 return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
89 }
90
91 static int
TIFFDefaultTransferFunction(TIFFDirectory * td)92 TIFFDefaultTransferFunction(TIFFDirectory* td)
93 {
94 uint16 **tf = td->td_transferfunction;
95 tmsize_t i, n, nbytes;
96
97 tf[0] = tf[1] = tf[2] = 0;
98 if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
99 return 0;
100
101 n = ((tmsize_t)1)<<td->td_bitspersample;
102 nbytes = n * sizeof (uint16);
103 tf[0] = (uint16 *)_TIFFmalloc(nbytes);
104 if (tf[0] == NULL)
105 return 0;
106 tf[0][0] = 0;
107 for (i = 1; i < n; i++) {
108 double t = (double)i/((double) n-1.);
109 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
110 }
111
112 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
113 tf[1] = (uint16 *)_TIFFmalloc(nbytes);
114 if(tf[1] == NULL)
115 goto bad;
116 _TIFFmemcpy(tf[1], tf[0], nbytes);
117 tf[2] = (uint16 *)_TIFFmalloc(nbytes);
118 if (tf[2] == NULL)
119 goto bad;
120 _TIFFmemcpy(tf[2], tf[0], nbytes);
121 }
122 return 1;
123
124 bad:
125 if (tf[0])
126 _TIFFfree(tf[0]);
127 if (tf[1])
128 _TIFFfree(tf[1]);
129 if (tf[2])
130 _TIFFfree(tf[2]);
131 tf[0] = tf[1] = tf[2] = 0;
132 return 0;
133 }
134
135 static int
TIFFDefaultRefBlackWhite(TIFFDirectory * td)136 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
137 {
138 int i;
139
140 td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
141 if (td->td_refblackwhite == NULL)
142 return 0;
143 if (td->td_photometric == PHOTOMETRIC_YCBCR) {
144 /*
145 * YCbCr (Class Y) images must have the ReferenceBlackWhite
146 * tag set. Fix the broken images, which lacks that tag.
147 */
148 td->td_refblackwhite[0] = 0.0F;
149 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
150 td->td_refblackwhite[5] = 255.0F;
151 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
152 } else {
153 /*
154 * Assume RGB (Class R)
155 */
156 for (i = 0; i < 3; i++) {
157 td->td_refblackwhite[2*i+0] = 0;
158 td->td_refblackwhite[2*i+1] =
159 (float)((1L<<td->td_bitspersample)-1L);
160 }
161 }
162 return 1;
163 }
164
165 /*
166 * Like TIFFGetField, but return any default
167 * value if the tag is not present in the directory.
168 *
169 * NB: We use the value in the directory, rather than
170 * explicit values so that defaults exist only one
171 * place in the library -- in TIFFDefaultDirectory.
172 */
173 int
TIFFVGetFieldDefaulted(TIFF * tif,uint32 tag,va_list ap)174 TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
175 {
176 TIFFDirectory *td = &tif->tif_dir;
177
178 if (TIFFVGetField(tif, tag, ap))
179 return (1);
180 switch (tag) {
181 case TIFFTAG_SUBFILETYPE:
182 *va_arg(ap, uint32 *) = td->td_subfiletype;
183 return (1);
184 case TIFFTAG_BITSPERSAMPLE:
185 *va_arg(ap, uint16 *) = td->td_bitspersample;
186 return (1);
187 case TIFFTAG_THRESHHOLDING:
188 *va_arg(ap, uint16 *) = td->td_threshholding;
189 return (1);
190 case TIFFTAG_FILLORDER:
191 *va_arg(ap, uint16 *) = td->td_fillorder;
192 return (1);
193 case TIFFTAG_ORIENTATION:
194 *va_arg(ap, uint16 *) = td->td_orientation;
195 return (1);
196 case TIFFTAG_SAMPLESPERPIXEL:
197 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
198 return (1);
199 case TIFFTAG_ROWSPERSTRIP:
200 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
201 return (1);
202 case TIFFTAG_MINSAMPLEVALUE:
203 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
204 return (1);
205 case TIFFTAG_MAXSAMPLEVALUE:
206 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
207 return (1);
208 case TIFFTAG_PLANARCONFIG:
209 *va_arg(ap, uint16 *) = td->td_planarconfig;
210 return (1);
211 case TIFFTAG_RESOLUTIONUNIT:
212 *va_arg(ap, uint16 *) = td->td_resolutionunit;
213 return (1);
214 case TIFFTAG_PREDICTOR:
215 {
216 TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
217 *va_arg(ap, uint16*) = (uint16) sp->predictor;
218 return 1;
219 }
220 case TIFFTAG_DOTRANGE:
221 *va_arg(ap, uint16 *) = 0;
222 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
223 return (1);
224 case TIFFTAG_INKSET:
225 *va_arg(ap, uint16 *) = INKSET_CMYK;
226 return 1;
227 case TIFFTAG_NUMBEROFINKS:
228 *va_arg(ap, uint16 *) = 4;
229 return (1);
230 case TIFFTAG_EXTRASAMPLES:
231 *va_arg(ap, uint16 *) = td->td_extrasamples;
232 *va_arg(ap, uint16 **) = td->td_sampleinfo;
233 return (1);
234 case TIFFTAG_MATTEING:
235 *va_arg(ap, uint16 *) =
236 (td->td_extrasamples == 1 &&
237 td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
238 return (1);
239 case TIFFTAG_TILEDEPTH:
240 *va_arg(ap, uint32 *) = td->td_tiledepth;
241 return (1);
242 case TIFFTAG_DATATYPE:
243 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
244 return (1);
245 case TIFFTAG_SAMPLEFORMAT:
246 *va_arg(ap, uint16 *) = td->td_sampleformat;
247 return(1);
248 case TIFFTAG_IMAGEDEPTH:
249 *va_arg(ap, uint32 *) = td->td_imagedepth;
250 return (1);
251 case TIFFTAG_YCBCRCOEFFICIENTS:
252 {
253 /* defaults are from CCIR Recommendation 601-1 */
254 static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
255 *va_arg(ap, float **) = ycbcrcoeffs;
256 return 1;
257 }
258 case TIFFTAG_YCBCRSUBSAMPLING:
259 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
260 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
261 return (1);
262 case TIFFTAG_YCBCRPOSITIONING:
263 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
264 return (1);
265 case TIFFTAG_WHITEPOINT:
266 {
267 static float whitepoint[2];
268
269 /* TIFF 6.0 specification tells that it is no default
270 value for the WhitePoint, but AdobePhotoshop TIFF
271 Technical Note tells that it should be CIE D50. */
272 whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
273 whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
274 *va_arg(ap, float **) = whitepoint;
275 return 1;
276 }
277 case TIFFTAG_TRANSFERFUNCTION:
278 if (!td->td_transferfunction[0] &&
279 !TIFFDefaultTransferFunction(td)) {
280 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
281 return (0);
282 }
283 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
284 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
285 *va_arg(ap, uint16 **) = td->td_transferfunction[1];
286 *va_arg(ap, uint16 **) = td->td_transferfunction[2];
287 }
288 return (1);
289 case TIFFTAG_REFERENCEBLACKWHITE:
290 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
291 return (0);
292 *va_arg(ap, float **) = td->td_refblackwhite;
293 return (1);
294 }
295 return 0;
296 }
297
298 /*
299 * Like TIFFGetField, but return any default
300 * value if the tag is not present in the directory.
301 */
302 int
TIFFGetFieldDefaulted(TIFF * tif,uint32 tag,...)303 TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
304 {
305 int ok;
306 va_list ap;
307
308 va_start(ap, tag);
309 ok = TIFFVGetFieldDefaulted(tif, tag, ap);
310 va_end(ap);
311 return (ok);
312 }
313
314 struct _Int64Parts {
315 int32 low, high;
316 };
317
318 typedef union {
319 struct _Int64Parts part;
320 int64 value;
321 } _Int64;
322
323 float
_TIFFUInt64ToFloat(uint64 ui64)324 _TIFFUInt64ToFloat(uint64 ui64)
325 {
326 _Int64 i;
327
328 i.value = ui64;
329 if (i.part.high >= 0) {
330 return (float)i.value;
331 } else {
332 long double df;
333 df = (long double)i.value;
334 df += 18446744073709551616.0; /* adding 2**64 */
335 return (float)df;
336 }
337 }
338
339 double
_TIFFUInt64ToDouble(uint64 ui64)340 _TIFFUInt64ToDouble(uint64 ui64)
341 {
342 _Int64 i;
343
344 i.value = ui64;
345 if (i.part.high >= 0) {
346 return (double)i.value;
347 } else {
348 long double df;
349 df = (long double)i.value;
350 df += 18446744073709551616.0; /* adding 2**64 */
351 return (double)df;
352 }
353 }
354
355 /* vim: set ts=8 sts=8 sw=8 noet: */
356 /*
357 * Local Variables:
358 * mode: c
359 * c-basic-offset: 8
360 * fill-column: 78
361 * End:
362 */
363