1 /*
2 * Copyright (c) 1991-1997 Sam Leffler
3 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and
6 * its documentation for any purpose is hereby granted without fee, provided
7 * that (i) the above copyright notices and this permission notice appear in
8 * all copies of the software and related documentation, and (ii) the names of
9 * Sam Leffler and Silicon Graphics may not be used in any advertising or
10 * publicity relating to the software without the specific, prior written
11 * permission of Sam Leffler and Silicon Graphics.
12 *
13 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25 /*
26 * TIFF Library.
27 *
28 * Auxiliary Support Routines.
29 */
30
31 #include <precomp.h>
32 #include "tif_predict.h"
33 #include <math.h>
34 #include <float.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 if (second && first > TIFF_UINT32_MAX / second) {
40 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
41 return 0;
42 }
43
44 return first * second;
45 }
46
47 uint64
_TIFFMultiply64(TIFF * tif,uint64 first,uint64 second,const char * where)48 _TIFFMultiply64(TIFF* tif, uint64 first, uint64 second, const char* where)
49 {
50 if (second && first > TIFF_UINT64_MAX / second) {
51 TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
52 return 0;
53 }
54
55 return first * second;
56 }
57
58 tmsize_t
_TIFFMultiplySSize(TIFF * tif,tmsize_t first,tmsize_t second,const char * where)59 _TIFFMultiplySSize(TIFF* tif, tmsize_t first, tmsize_t second, const char* where)
60 {
61 if( first <= 0 || second <= 0 )
62 {
63 if( tif != NULL && where != NULL )
64 {
65 TIFFErrorExt(tif->tif_clientdata, where,
66 "Invalid argument to _TIFFMultiplySSize() in %s", where);
67 }
68 return 0;
69 }
70
71 if( first > TIFF_TMSIZE_T_MAX / second )
72 {
73 if( tif != NULL && where != NULL )
74 {
75 TIFFErrorExt(tif->tif_clientdata, where,
76 "Integer overflow in %s", where);
77 }
78 return 0;
79 }
80 return first * second;
81 }
82
_TIFFCastUInt64ToSSize(TIFF * tif,uint64 val,const char * module)83 tmsize_t _TIFFCastUInt64ToSSize(TIFF* tif, uint64 val, const char* module)
84 {
85 if( val > (uint64)TIFF_TMSIZE_T_MAX )
86 {
87 if( tif != NULL && module != NULL )
88 {
89 TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
90 }
91 return 0;
92 }
93 return (tmsize_t)val;
94 }
95
96 void*
_TIFFCheckRealloc(TIFF * tif,void * buffer,tmsize_t nmemb,tmsize_t elem_size,const char * what)97 _TIFFCheckRealloc(TIFF* tif, void* buffer,
98 tmsize_t nmemb, tmsize_t elem_size, const char* what)
99 {
100 void* cp = NULL;
101 tmsize_t count = _TIFFMultiplySSize(tif, nmemb, elem_size, NULL);
102 /*
103 * Check for integer overflow.
104 */
105 if (count != 0)
106 {
107 cp = _TIFFrealloc(buffer, count);
108 }
109
110 if (cp == NULL) {
111 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
112 "Failed to allocate memory for %s "
113 "(%ld elements of %ld bytes each)",
114 what,(long) nmemb, (long) elem_size);
115 }
116
117 return cp;
118 }
119
120 void*
_TIFFCheckMalloc(TIFF * tif,tmsize_t nmemb,tmsize_t elem_size,const char * what)121 _TIFFCheckMalloc(TIFF* tif, tmsize_t nmemb, tmsize_t elem_size, const char* what)
122 {
123 return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);
124 }
125
126 static int
TIFFDefaultTransferFunction(TIFFDirectory * td)127 TIFFDefaultTransferFunction(TIFFDirectory* td)
128 {
129 uint16 **tf = td->td_transferfunction;
130 tmsize_t i, n, nbytes;
131
132 tf[0] = tf[1] = tf[2] = 0;
133 if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
134 return 0;
135
136 n = ((tmsize_t)1)<<td->td_bitspersample;
137 nbytes = n * sizeof (uint16);
138 tf[0] = (uint16 *)_TIFFmalloc(nbytes);
139 if (tf[0] == NULL)
140 return 0;
141 tf[0][0] = 0;
142 for (i = 1; i < n; i++) {
143 double t = (double)i/((double) n-1.);
144 tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
145 }
146
147 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
148 tf[1] = (uint16 *)_TIFFmalloc(nbytes);
149 if(tf[1] == NULL)
150 goto bad;
151 _TIFFmemcpy(tf[1], tf[0], nbytes);
152 tf[2] = (uint16 *)_TIFFmalloc(nbytes);
153 if (tf[2] == NULL)
154 goto bad;
155 _TIFFmemcpy(tf[2], tf[0], nbytes);
156 }
157 return 1;
158
159 bad:
160 if (tf[0])
161 _TIFFfree(tf[0]);
162 if (tf[1])
163 _TIFFfree(tf[1]);
164 if (tf[2])
165 _TIFFfree(tf[2]);
166 tf[0] = tf[1] = tf[2] = 0;
167 return 0;
168 }
169
170 static int
TIFFDefaultRefBlackWhite(TIFFDirectory * td)171 TIFFDefaultRefBlackWhite(TIFFDirectory* td)
172 {
173 int i;
174
175 td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
176 if (td->td_refblackwhite == NULL)
177 return 0;
178 if (td->td_photometric == PHOTOMETRIC_YCBCR) {
179 /*
180 * YCbCr (Class Y) images must have the ReferenceBlackWhite
181 * tag set. Fix the broken images, which lacks that tag.
182 */
183 td->td_refblackwhite[0] = 0.0F;
184 td->td_refblackwhite[1] = td->td_refblackwhite[3] =
185 td->td_refblackwhite[5] = 255.0F;
186 td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
187 } else {
188 /*
189 * Assume RGB (Class R)
190 */
191 for (i = 0; i < 3; i++) {
192 td->td_refblackwhite[2*i+0] = 0;
193 td->td_refblackwhite[2*i+1] =
194 (float)((1L<<td->td_bitspersample)-1L);
195 }
196 }
197 return 1;
198 }
199
200 /*
201 * Like TIFFGetField, but return any default
202 * value if the tag is not present in the directory.
203 *
204 * NB: We use the value in the directory, rather than
205 * explicit values so that defaults exist only one
206 * place in the library -- in TIFFDefaultDirectory.
207 */
208 int
TIFFVGetFieldDefaulted(TIFF * tif,uint32 tag,va_list ap)209 TIFFVGetFieldDefaulted(TIFF* tif, uint32 tag, va_list ap)
210 {
211 TIFFDirectory *td = &tif->tif_dir;
212
213 if (TIFFVGetField(tif, tag, ap))
214 return (1);
215 switch (tag) {
216 case TIFFTAG_SUBFILETYPE:
217 *va_arg(ap, uint32 *) = td->td_subfiletype;
218 return (1);
219 case TIFFTAG_BITSPERSAMPLE:
220 *va_arg(ap, uint16 *) = td->td_bitspersample;
221 return (1);
222 case TIFFTAG_THRESHHOLDING:
223 *va_arg(ap, uint16 *) = td->td_threshholding;
224 return (1);
225 case TIFFTAG_FILLORDER:
226 *va_arg(ap, uint16 *) = td->td_fillorder;
227 return (1);
228 case TIFFTAG_ORIENTATION:
229 *va_arg(ap, uint16 *) = td->td_orientation;
230 return (1);
231 case TIFFTAG_SAMPLESPERPIXEL:
232 *va_arg(ap, uint16 *) = td->td_samplesperpixel;
233 return (1);
234 case TIFFTAG_ROWSPERSTRIP:
235 *va_arg(ap, uint32 *) = td->td_rowsperstrip;
236 return (1);
237 case TIFFTAG_MINSAMPLEVALUE:
238 *va_arg(ap, uint16 *) = td->td_minsamplevalue;
239 return (1);
240 case TIFFTAG_MAXSAMPLEVALUE:
241 *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
242 return (1);
243 case TIFFTAG_PLANARCONFIG:
244 *va_arg(ap, uint16 *) = td->td_planarconfig;
245 return (1);
246 case TIFFTAG_RESOLUTIONUNIT:
247 *va_arg(ap, uint16 *) = td->td_resolutionunit;
248 return (1);
249 case TIFFTAG_PREDICTOR:
250 {
251 TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
252 if( sp == NULL )
253 {
254 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
255 "Cannot get \"Predictor\" tag as plugin is not configured");
256 *va_arg(ap, uint16*) = 0;
257 return 0;
258 }
259 *va_arg(ap, uint16*) = (uint16) sp->predictor;
260 return 1;
261 }
262 case TIFFTAG_DOTRANGE:
263 *va_arg(ap, uint16 *) = 0;
264 *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
265 return (1);
266 case TIFFTAG_INKSET:
267 *va_arg(ap, uint16 *) = INKSET_CMYK;
268 return 1;
269 case TIFFTAG_NUMBEROFINKS:
270 *va_arg(ap, uint16 *) = 4;
271 return (1);
272 case TIFFTAG_EXTRASAMPLES:
273 *va_arg(ap, uint16 *) = td->td_extrasamples;
274 *va_arg(ap, uint16 **) = td->td_sampleinfo;
275 return (1);
276 case TIFFTAG_MATTEING:
277 *va_arg(ap, uint16 *) =
278 (td->td_extrasamples == 1 &&
279 td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
280 return (1);
281 case TIFFTAG_TILEDEPTH:
282 *va_arg(ap, uint32 *) = td->td_tiledepth;
283 return (1);
284 case TIFFTAG_DATATYPE:
285 *va_arg(ap, uint16 *) = td->td_sampleformat-1;
286 return (1);
287 case TIFFTAG_SAMPLEFORMAT:
288 *va_arg(ap, uint16 *) = td->td_sampleformat;
289 return(1);
290 case TIFFTAG_IMAGEDEPTH:
291 *va_arg(ap, uint32 *) = td->td_imagedepth;
292 return (1);
293 case TIFFTAG_YCBCRCOEFFICIENTS:
294 {
295 /* defaults are from CCIR Recommendation 601-1 */
296 static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
297 *va_arg(ap, float **) = ycbcrcoeffs;
298 return 1;
299 }
300 case TIFFTAG_YCBCRSUBSAMPLING:
301 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
302 *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
303 return (1);
304 case TIFFTAG_YCBCRPOSITIONING:
305 *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
306 return (1);
307 case TIFFTAG_WHITEPOINT:
308 {
309 static float whitepoint[2];
310
311 /* TIFF 6.0 specification tells that it is no default
312 value for the WhitePoint, but AdobePhotoshop TIFF
313 Technical Note tells that it should be CIE D50. */
314 whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
315 whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
316 *va_arg(ap, float **) = whitepoint;
317 return 1;
318 }
319 case TIFFTAG_TRANSFERFUNCTION:
320 if (!td->td_transferfunction[0] &&
321 !TIFFDefaultTransferFunction(td)) {
322 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
323 return (0);
324 }
325 *va_arg(ap, uint16 **) = td->td_transferfunction[0];
326 if (td->td_samplesperpixel - td->td_extrasamples > 1) {
327 *va_arg(ap, uint16 **) = td->td_transferfunction[1];
328 *va_arg(ap, uint16 **) = td->td_transferfunction[2];
329 }
330 return (1);
331 case TIFFTAG_REFERENCEBLACKWHITE:
332 if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
333 return (0);
334 *va_arg(ap, float **) = td->td_refblackwhite;
335 return (1);
336 }
337 return 0;
338 }
339
340 /*
341 * Like TIFFGetField, but return any default
342 * value if the tag is not present in the directory.
343 */
344 int
TIFFGetFieldDefaulted(TIFF * tif,uint32 tag,...)345 TIFFGetFieldDefaulted(TIFF* tif, uint32 tag, ...)
346 {
347 int ok;
348 va_list ap;
349
350 va_start(ap, tag);
351 ok = TIFFVGetFieldDefaulted(tif, tag, ap);
352 va_end(ap);
353 return (ok);
354 }
355
356 struct _Int64Parts {
357 int32 low, high;
358 };
359
360 typedef union {
361 struct _Int64Parts part;
362 int64 value;
363 } _Int64;
364
365 float
_TIFFUInt64ToFloat(uint64 ui64)366 _TIFFUInt64ToFloat(uint64 ui64)
367 {
368 _Int64 i;
369
370 i.value = ui64;
371 if (i.part.high >= 0) {
372 return (float)i.value;
373 } else {
374 long double df;
375 df = (long double)i.value;
376 df += 18446744073709551616.0; /* adding 2**64 */
377 return (float)df;
378 }
379 }
380
381 double
_TIFFUInt64ToDouble(uint64 ui64)382 _TIFFUInt64ToDouble(uint64 ui64)
383 {
384 _Int64 i;
385
386 i.value = ui64;
387 if (i.part.high >= 0) {
388 return (double)i.value;
389 } else {
390 long double df;
391 df = (long double)i.value;
392 df += 18446744073709551616.0; /* adding 2**64 */
393 return (double)df;
394 }
395 }
396
_TIFFClampDoubleToFloat(double val)397 float _TIFFClampDoubleToFloat( double val )
398 {
399 if( val > FLT_MAX )
400 return FLT_MAX;
401 if( val < -FLT_MAX )
402 return -FLT_MAX;
403 return (float)val;
404 }
405
_TIFFSeekOK(TIFF * tif,toff_t off)406 int _TIFFSeekOK(TIFF* tif, toff_t off)
407 {
408 /* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
409 /* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
410 return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
411 }
412
413 /* vim: set ts=8 sts=8 sw=8 noet: */
414 /*
415 * Local Variables:
416 * mode: c
417 * c-basic-offset: 8
418 * fill-column: 78
419 * End:
420 */
421