sdk-world v2026.11.05
PS2 SDK - world tier (copyleft-allowed, non-essential packages)
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pngset.c
1/* pngset.c - storage of image information into info struct
2 *
3 * Copyright (c) 2018-2025 Cosmin Truta
4 * Copyright (c) 1998-2018 Glenn Randers-Pehrson
5 * Copyright (c) 1996-1997 Andreas Dilger
6 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
7 *
8 * This code is released under the libpng license.
9 * For conditions of distribution and use, see the disclaimer
10 * and license in png.h
11 *
12 * The functions here are used during reads to store data from the file
13 * into the info struct, and during writes to store application data
14 * into the info struct for writing into the file. This abstracts the
15 * info struct and allows us to change the structure in the future.
16 */
17
18#include "pngpriv.h"
19
20#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
21
22#ifdef PNG_bKGD_SUPPORTED
23void PNGAPI
24png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr,
25 png_const_color_16p background)
26{
27 png_debug1(1, "in %s storage function", "bKGD");
28
29 if (png_ptr == NULL || info_ptr == NULL || background == NULL)
30 return;
31
32 info_ptr->background = *background;
33 info_ptr->valid |= PNG_INFO_bKGD;
34}
35#endif
36
37#ifdef PNG_cHRM_SUPPORTED
38void PNGFAPI
39png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
40 png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
41 png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
42 png_fixed_point blue_x, png_fixed_point blue_y)
43{
44 png_debug1(1, "in %s storage function", "cHRM fixed");
45
46 if (png_ptr == NULL || info_ptr == NULL)
47 return;
48
49 info_ptr->cHRM.redx = red_x;
50 info_ptr->cHRM.redy = red_y;
51 info_ptr->cHRM.greenx = green_x;
52 info_ptr->cHRM.greeny = green_y;
53 info_ptr->cHRM.bluex = blue_x;
54 info_ptr->cHRM.bluey = blue_y;
55 info_ptr->cHRM.whitex = white_x;
56 info_ptr->cHRM.whitey = white_y;
57
58 info_ptr->valid |= PNG_INFO_cHRM;
59}
60
61void PNGFAPI
62png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
63 png_fixed_point int_red_X, png_fixed_point int_red_Y,
64 png_fixed_point int_red_Z, png_fixed_point int_green_X,
65 png_fixed_point int_green_Y, png_fixed_point int_green_Z,
66 png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
67 png_fixed_point int_blue_Z)
68{
69 png_XYZ XYZ;
70 png_xy xy;
71
72 png_debug1(1, "in %s storage function", "cHRM XYZ fixed");
73
74 if (png_ptr == NULL || info_ptr == NULL)
75 return;
76
77 XYZ.red_X = int_red_X;
78 XYZ.red_Y = int_red_Y;
79 XYZ.red_Z = int_red_Z;
80 XYZ.green_X = int_green_X;
81 XYZ.green_Y = int_green_Y;
82 XYZ.green_Z = int_green_Z;
83 XYZ.blue_X = int_blue_X;
84 XYZ.blue_Y = int_blue_Y;
85 XYZ.blue_Z = int_blue_Z;
86
87 if (png_xy_from_XYZ(&xy, &XYZ) == 0)
88 {
89 info_ptr->cHRM = xy;
90 info_ptr->valid |= PNG_INFO_cHRM;
91 }
92
93 else
94 png_app_error(png_ptr, "invalid cHRM XYZ");
95}
96
97# ifdef PNG_FLOATING_POINT_SUPPORTED
98void PNGAPI
99png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr,
100 double white_x, double white_y, double red_x, double red_y,
101 double green_x, double green_y, double blue_x, double blue_y)
102{
103 png_set_cHRM_fixed(png_ptr, info_ptr,
104 png_fixed(png_ptr, white_x, "cHRM White X"),
105 png_fixed(png_ptr, white_y, "cHRM White Y"),
106 png_fixed(png_ptr, red_x, "cHRM Red X"),
107 png_fixed(png_ptr, red_y, "cHRM Red Y"),
108 png_fixed(png_ptr, green_x, "cHRM Green X"),
109 png_fixed(png_ptr, green_y, "cHRM Green Y"),
110 png_fixed(png_ptr, blue_x, "cHRM Blue X"),
111 png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
112}
113
114void PNGAPI
115png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X,
116 double red_Y, double red_Z, double green_X, double green_Y, double green_Z,
117 double blue_X, double blue_Y, double blue_Z)
118{
119 png_set_cHRM_XYZ_fixed(png_ptr, info_ptr,
120 png_fixed(png_ptr, red_X, "cHRM Red X"),
121 png_fixed(png_ptr, red_Y, "cHRM Red Y"),
122 png_fixed(png_ptr, red_Z, "cHRM Red Z"),
123 png_fixed(png_ptr, green_X, "cHRM Green X"),
124 png_fixed(png_ptr, green_Y, "cHRM Green Y"),
125 png_fixed(png_ptr, green_Z, "cHRM Green Z"),
126 png_fixed(png_ptr, blue_X, "cHRM Blue X"),
127 png_fixed(png_ptr, blue_Y, "cHRM Blue Y"),
128 png_fixed(png_ptr, blue_Z, "cHRM Blue Z"));
129}
130# endif /* FLOATING_POINT */
131
132#endif /* cHRM */
133
134#ifdef PNG_cICP_SUPPORTED
135void PNGAPI
136png_set_cICP(png_const_structrp png_ptr, png_inforp info_ptr,
137 png_byte colour_primaries, png_byte transfer_function,
138 png_byte matrix_coefficients, png_byte video_full_range_flag)
139{
140 png_debug1(1, "in %s storage function", "cICP");
141
142 if (png_ptr == NULL || info_ptr == NULL)
143 return;
144
145 info_ptr->cicp_colour_primaries = colour_primaries;
146 info_ptr->cicp_transfer_function = transfer_function;
147 info_ptr->cicp_matrix_coefficients = matrix_coefficients;
148 info_ptr->cicp_video_full_range_flag = video_full_range_flag;
149
150 if (info_ptr->cicp_matrix_coefficients != 0)
151 {
152 png_warning(png_ptr, "Invalid cICP matrix coefficients");
153 return;
154 }
155
156 info_ptr->valid |= PNG_INFO_cICP;
157}
158#endif /* cICP */
159
160#ifdef PNG_cLLI_SUPPORTED
161void PNGFAPI
162png_set_cLLI_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
163 /* The values below are in cd/m2 (nits) and are scaled by 10,000; not
164 * 100,000 as in the case of png_fixed_point.
165 */
166 png_uint_32 maxCLL, png_uint_32 maxFALL)
167{
168 png_debug1(1, "in %s storage function", "cLLI");
169
170 if (png_ptr == NULL || info_ptr == NULL)
171 return;
172
173 /* Check the light level range: */
174 if (maxCLL > 0x7FFFFFFFU || maxFALL > 0x7FFFFFFFU)
175 {
176 /* The limit is 200kcd/m2; somewhat bright but not inconceivable because
177 * human vision is said to run up to 100Mcd/m2. The sun is about 2Gcd/m2.
178 *
179 * The reference sRGB monitor is 80cd/m2 and the limit of PQ encoding is
180 * 2kcd/m2.
181 */
182 png_chunk_report(png_ptr, "cLLI light level exceeds PNG limit",
183 PNG_CHUNK_WRITE_ERROR);
184 return;
185 }
186
187 info_ptr->maxCLL = maxCLL;
188 info_ptr->maxFALL = maxFALL;
189 info_ptr->valid |= PNG_INFO_cLLI;
190}
191
192# ifdef PNG_FLOATING_POINT_SUPPORTED
193void PNGAPI
194png_set_cLLI(png_const_structrp png_ptr, png_inforp info_ptr,
195 double maxCLL, double maxFALL)
196{
197 png_set_cLLI_fixed(png_ptr, info_ptr,
198 png_fixed_ITU(png_ptr, maxCLL, "png_set_cLLI(maxCLL)"),
199 png_fixed_ITU(png_ptr, maxFALL, "png_set_cLLI(maxFALL)"));
200}
201# endif /* FLOATING_POINT */
202#endif /* cLLI */
203
204#ifdef PNG_mDCV_SUPPORTED
205static png_uint_16
206png_ITU_fixed_16(int *error, png_fixed_point v)
207{
208 /* Return a safe uint16_t value scaled according to the ITU H273 rules for
209 * 16-bit display chromaticities. Functions like the corresponding
210 * png_fixed() internal function with regard to errors: it's an error on
211 * write, a chunk_benign_error on read: See the definition of
212 * png_chunk_report in pngpriv.h.
213 */
214 v /= 2; /* rounds to 0 in C: avoids insignificant arithmetic errors */
215 if (v > 65535 || v < 0)
216 {
217 *error = 1;
218 return 0;
219 }
220
221 return (png_uint_16)/*SAFE*/v;
222}
223
224void PNGAPI
225png_set_mDCV_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
226 png_fixed_point white_x, png_fixed_point white_y,
227 png_fixed_point red_x, png_fixed_point red_y,
228 png_fixed_point green_x, png_fixed_point green_y,
229 png_fixed_point blue_x, png_fixed_point blue_y,
230 png_uint_32 maxDL,
231 png_uint_32 minDL)
232{
233 png_uint_16 rx, ry, gx, gy, bx, by, wx, wy;
234 int error;
235
236 png_debug1(1, "in %s storage function", "mDCV");
237
238 if (png_ptr == NULL || info_ptr == NULL)
239 return;
240
241 /* Check the input values to ensure they are in the expected range: */
242 error = 0;
243 rx = png_ITU_fixed_16(&error, red_x);
244 ry = png_ITU_fixed_16(&error, red_y);
245 gx = png_ITU_fixed_16(&error, green_x);
246 gy = png_ITU_fixed_16(&error, green_y);
247 bx = png_ITU_fixed_16(&error, blue_x);
248 by = png_ITU_fixed_16(&error, blue_y);
249 wx = png_ITU_fixed_16(&error, white_x);
250 wy = png_ITU_fixed_16(&error, white_y);
251
252 if (error)
253 {
254 png_chunk_report(png_ptr,
255 "mDCV chromaticities outside representable range",
256 PNG_CHUNK_WRITE_ERROR);
257 return;
258 }
259
260 /* Check the light level range: */
261 if (maxDL > 0x7FFFFFFFU || minDL > 0x7FFFFFFFU)
262 {
263 /* The limit is 200kcd/m2; somewhat bright but not inconceivable because
264 * human vision is said to run up to 100Mcd/m2. The sun is about 2Gcd/m2.
265 *
266 * The reference sRGB monitor is 80cd/m2 and the limit of PQ encoding is
267 * 2kcd/m2.
268 */
269 png_chunk_report(png_ptr, "mDCV display light level exceeds PNG limit",
270 PNG_CHUNK_WRITE_ERROR);
271 return;
272 }
273
274 /* All values are safe, the settings are accepted.
275 *
276 * IMPLEMENTATION NOTE: in practice the values can be checked and assigned
277 * but the result is confusing if a writing app calls png_set_mDCV more than
278 * once, the second time with an invalid value. This approach is more
279 * obviously correct at the cost of typing and a very slight machine
280 * overhead.
281 */
282 info_ptr->mastering_red_x = rx;
283 info_ptr->mastering_red_y = ry;
284 info_ptr->mastering_green_x = gx;
285 info_ptr->mastering_green_y = gy;
286 info_ptr->mastering_blue_x = bx;
287 info_ptr->mastering_blue_y = by;
288 info_ptr->mastering_white_x = wx;
289 info_ptr->mastering_white_y = wy;
290 info_ptr->mastering_maxDL = maxDL;
291 info_ptr->mastering_minDL = minDL;
292 info_ptr->valid |= PNG_INFO_mDCV;
293}
294
295# ifdef PNG_FLOATING_POINT_SUPPORTED
296void PNGAPI
297png_set_mDCV(png_const_structrp png_ptr, png_inforp info_ptr,
298 double white_x, double white_y, double red_x, double red_y, double green_x,
299 double green_y, double blue_x, double blue_y,
300 double maxDL, double minDL)
301{
302 png_set_mDCV_fixed(png_ptr, info_ptr,
303 png_fixed(png_ptr, white_x, "png_set_mDCV(white(x))"),
304 png_fixed(png_ptr, white_y, "png_set_mDCV(white(y))"),
305 png_fixed(png_ptr, red_x, "png_set_mDCV(red(x))"),
306 png_fixed(png_ptr, red_y, "png_set_mDCV(red(y))"),
307 png_fixed(png_ptr, green_x, "png_set_mDCV(green(x))"),
308 png_fixed(png_ptr, green_y, "png_set_mDCV(green(y))"),
309 png_fixed(png_ptr, blue_x, "png_set_mDCV(blue(x))"),
310 png_fixed(png_ptr, blue_y, "png_set_mDCV(blue(y))"),
311 png_fixed_ITU(png_ptr, maxDL, "png_set_mDCV(maxDL)"),
312 png_fixed_ITU(png_ptr, minDL, "png_set_mDCV(minDL)"));
313}
314# endif /* FLOATING_POINT */
315#endif /* mDCV */
316
317#ifdef PNG_eXIf_SUPPORTED
318void PNGAPI
319png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
320 png_bytep exif)
321{
322 png_warning(png_ptr, "png_set_eXIf does not work; use png_set_eXIf_1");
323 PNG_UNUSED(info_ptr)
324 PNG_UNUSED(exif)
325}
326
327void PNGAPI
328png_set_eXIf_1(png_const_structrp png_ptr, png_inforp info_ptr,
329 png_uint_32 num_exif, png_bytep exif)
330{
331 png_bytep new_exif;
332
333 png_debug1(1, "in %s storage function", "eXIf");
334
335 if (png_ptr == NULL || info_ptr == NULL ||
336 (png_ptr->mode & PNG_WROTE_eXIf) != 0)
337 return;
338
339 new_exif = png_voidcast(png_bytep, png_malloc_warn(png_ptr, num_exif));
340
341 if (new_exif == NULL)
342 {
343 png_warning(png_ptr, "Insufficient memory for eXIf chunk data");
344 return;
345 }
346
347 memcpy(new_exif, exif, (size_t)num_exif);
348
349 png_free_data(png_ptr, info_ptr, PNG_FREE_EXIF, 0);
350
351 info_ptr->num_exif = num_exif;
352 info_ptr->exif = new_exif;
353 info_ptr->free_me |= PNG_FREE_EXIF;
354 info_ptr->valid |= PNG_INFO_eXIf;
355}
356#endif /* eXIf */
357
358#ifdef PNG_gAMA_SUPPORTED
359void PNGFAPI
360png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr,
361 png_fixed_point file_gamma)
362{
363 png_debug1(1, "in %s storage function", "gAMA");
364
365 if (png_ptr == NULL || info_ptr == NULL)
366 return;
367
368 info_ptr->gamma = file_gamma;
369 info_ptr->valid |= PNG_INFO_gAMA;
370}
371
372# ifdef PNG_FLOATING_POINT_SUPPORTED
373void PNGAPI
374png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma)
375{
376 png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
377 "png_set_gAMA"));
378}
379# endif
380#endif
381
382#ifdef PNG_hIST_SUPPORTED
383void PNGAPI
384png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
385 png_const_uint_16p hist)
386{
387 int i;
388
389 png_debug1(1, "in %s storage function", "hIST");
390
391 if (png_ptr == NULL || info_ptr == NULL)
392 return;
393
394 if (info_ptr->num_palette == 0 || info_ptr->num_palette
395 > PNG_MAX_PALETTE_LENGTH)
396 {
397 png_warning(png_ptr,
398 "Invalid palette size, hIST allocation skipped");
399
400 return;
401 }
402
403 png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
404
405 /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
406 * version 1.2.1
407 */
408 info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr,
409 PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16))));
410
411 if (info_ptr->hist == NULL)
412 {
413 png_warning(png_ptr, "Insufficient memory for hIST chunk data");
414 return;
415 }
416
417 for (i = 0; i < info_ptr->num_palette; i++)
418 info_ptr->hist[i] = hist[i];
419
420 info_ptr->free_me |= PNG_FREE_HIST;
421 info_ptr->valid |= PNG_INFO_hIST;
422}
423#endif
424
425void PNGAPI
426png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr,
427 png_uint_32 width, png_uint_32 height, int bit_depth,
428 int color_type, int interlace_type, int compression_type,
429 int filter_type)
430{
431 png_debug1(1, "in %s storage function", "IHDR");
432
433 if (png_ptr == NULL || info_ptr == NULL)
434 return;
435
436 info_ptr->width = width;
437 info_ptr->height = height;
438 info_ptr->bit_depth = (png_byte)bit_depth;
439 info_ptr->color_type = (png_byte)color_type;
440 info_ptr->compression_type = (png_byte)compression_type;
441 info_ptr->filter_type = (png_byte)filter_type;
442 info_ptr->interlace_type = (png_byte)interlace_type;
443
444 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
445 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
446 info_ptr->compression_type, info_ptr->filter_type);
447
448 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
449 info_ptr->channels = 1;
450
451 else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0)
452 info_ptr->channels = 3;
453
454 else
455 info_ptr->channels = 1;
456
457 if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)
458 info_ptr->channels++;
459
460 info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
461
462 info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
463}
464
465#ifdef PNG_oFFs_SUPPORTED
466void PNGAPI
467png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr,
468 png_int_32 offset_x, png_int_32 offset_y, int unit_type)
469{
470 png_debug1(1, "in %s storage function", "oFFs");
471
472 if (png_ptr == NULL || info_ptr == NULL)
473 return;
474
475 info_ptr->x_offset = offset_x;
476 info_ptr->y_offset = offset_y;
477 info_ptr->offset_unit_type = (png_byte)unit_type;
478 info_ptr->valid |= PNG_INFO_oFFs;
479}
480#endif
481
482#ifdef PNG_pCAL_SUPPORTED
483void PNGAPI
484png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
485 png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
486 int nparams, png_const_charp units, png_charpp params)
487{
488 size_t length;
489 int i;
490
491 png_debug1(1, "in %s storage function", "pCAL");
492
493 if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL
494 || (nparams > 0 && params == NULL))
495 return;
496
497 length = strlen(purpose) + 1;
498 png_debug1(3, "allocating purpose for info (%lu bytes)",
499 (unsigned long)length);
500
501 /* TODO: validate format of calibration name and unit name */
502
503 /* Check that the type matches the specification. */
504 if (type < 0 || type > 3)
505 {
506 png_chunk_report(png_ptr, "Invalid pCAL equation type",
507 PNG_CHUNK_WRITE_ERROR);
508 return;
509 }
510
511 if (nparams < 0 || nparams > 255)
512 {
513 png_chunk_report(png_ptr, "Invalid pCAL parameter count",
514 PNG_CHUNK_WRITE_ERROR);
515 return;
516 }
517
518 /* Validate params[nparams] */
519 for (i=0; i<nparams; ++i)
520 {
521 if (params[i] == NULL ||
522 !png_check_fp_string(params[i], strlen(params[i])))
523 {
524 png_chunk_report(png_ptr, "Invalid format for pCAL parameter",
525 PNG_CHUNK_WRITE_ERROR);
526 return;
527 }
528 }
529
530 info_ptr->pcal_purpose = png_voidcast(png_charp,
531 png_malloc_warn(png_ptr, length));
532
533 if (info_ptr->pcal_purpose == NULL)
534 {
535 png_chunk_report(png_ptr, "Insufficient memory for pCAL purpose",
536 PNG_CHUNK_WRITE_ERROR);
537 return;
538 }
539
540 memcpy(info_ptr->pcal_purpose, purpose, length);
541
542 info_ptr->free_me |= PNG_FREE_PCAL;
543
544 png_debug(3, "storing X0, X1, type, and nparams in info");
545 info_ptr->pcal_X0 = X0;
546 info_ptr->pcal_X1 = X1;
547 info_ptr->pcal_type = (png_byte)type;
548 info_ptr->pcal_nparams = (png_byte)nparams;
549
550 length = strlen(units) + 1;
551 png_debug1(3, "allocating units for info (%lu bytes)",
552 (unsigned long)length);
553
554 info_ptr->pcal_units = png_voidcast(png_charp,
555 png_malloc_warn(png_ptr, length));
556
557 if (info_ptr->pcal_units == NULL)
558 {
559 png_warning(png_ptr, "Insufficient memory for pCAL units");
560 return;
561 }
562
563 memcpy(info_ptr->pcal_units, units, length);
564
565 info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr,
566 (size_t)(((unsigned int)nparams + 1) * (sizeof (png_charp)))));
567
568 if (info_ptr->pcal_params == NULL)
569 {
570 png_warning(png_ptr, "Insufficient memory for pCAL params");
571 return;
572 }
573
574 memset(info_ptr->pcal_params, 0, ((unsigned int)nparams + 1) *
575 (sizeof (png_charp)));
576
577 for (i = 0; i < nparams; i++)
578 {
579 length = strlen(params[i]) + 1;
580 png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
581 (unsigned long)length);
582
583 info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
584
585 if (info_ptr->pcal_params[i] == NULL)
586 {
587 png_warning(png_ptr, "Insufficient memory for pCAL parameter");
588 return;
589 }
590
591 memcpy(info_ptr->pcal_params[i], params[i], length);
592 }
593
594 info_ptr->valid |= PNG_INFO_pCAL;
595}
596#endif
597
598#ifdef PNG_sCAL_SUPPORTED
599void PNGAPI
600png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr,
601 int unit, png_const_charp swidth, png_const_charp sheight)
602{
603 size_t lengthw = 0, lengthh = 0;
604
605 png_debug1(1, "in %s storage function", "sCAL");
606
607 if (png_ptr == NULL || info_ptr == NULL)
608 return;
609
610 /* Double check the unit (should never get here with an invalid
611 * unit unless this is an API call.)
612 */
613 if (unit != 1 && unit != 2)
614 png_error(png_ptr, "Invalid sCAL unit");
615
616 if (swidth == NULL || (lengthw = strlen(swidth)) == 0 ||
617 swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw))
618 png_error(png_ptr, "Invalid sCAL width");
619
620 if (sheight == NULL || (lengthh = strlen(sheight)) == 0 ||
621 sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh))
622 png_error(png_ptr, "Invalid sCAL height");
623
624 info_ptr->scal_unit = (png_byte)unit;
625
626 ++lengthw;
627
628 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
629
630 info_ptr->scal_s_width = png_voidcast(png_charp,
631 png_malloc_warn(png_ptr, lengthw));
632
633 if (info_ptr->scal_s_width == NULL)
634 {
635 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
636
637 return;
638 }
639
640 memcpy(info_ptr->scal_s_width, swidth, lengthw);
641
642 ++lengthh;
643
644 png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
645
646 info_ptr->scal_s_height = png_voidcast(png_charp,
647 png_malloc_warn(png_ptr, lengthh));
648
649 if (info_ptr->scal_s_height == NULL)
650 {
651 png_free(png_ptr, info_ptr->scal_s_width);
652 info_ptr->scal_s_width = NULL;
653
654 png_warning(png_ptr, "Memory allocation failed while processing sCAL");
655 return;
656 }
657
658 memcpy(info_ptr->scal_s_height, sheight, lengthh);
659
660 info_ptr->free_me |= PNG_FREE_SCAL;
661 info_ptr->valid |= PNG_INFO_sCAL;
662}
663
664# ifdef PNG_FLOATING_POINT_SUPPORTED
665void PNGAPI
666png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit,
667 double width, double height)
668{
669 png_debug1(1, "in %s storage function", "sCAL");
670
671 /* Check the arguments. */
672 if (width <= 0)
673 png_warning(png_ptr, "Invalid sCAL width ignored");
674
675 else if (height <= 0)
676 png_warning(png_ptr, "Invalid sCAL height ignored");
677
678 else
679 {
680 /* Convert 'width' and 'height' to ASCII. */
681 char swidth[PNG_sCAL_MAX_DIGITS+1];
682 char sheight[PNG_sCAL_MAX_DIGITS+1];
683
684 png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width,
685 PNG_sCAL_PRECISION);
686 png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height,
687 PNG_sCAL_PRECISION);
688
689 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
690 }
691}
692# endif
693
694# ifdef PNG_FIXED_POINT_SUPPORTED
695void PNGAPI
696png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit,
697 png_fixed_point width, png_fixed_point height)
698{
699 png_debug1(1, "in %s storage function", "sCAL");
700
701 /* Check the arguments. */
702 if (width <= 0)
703 png_warning(png_ptr, "Invalid sCAL width ignored");
704
705 else if (height <= 0)
706 png_warning(png_ptr, "Invalid sCAL height ignored");
707
708 else
709 {
710 /* Convert 'width' and 'height' to ASCII. */
711 char swidth[PNG_sCAL_MAX_DIGITS+1];
712 char sheight[PNG_sCAL_MAX_DIGITS+1];
713
714 png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width);
715 png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height);
716
717 png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
718 }
719}
720# endif
721#endif
722
723#ifdef PNG_pHYs_SUPPORTED
724void PNGAPI
725png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr,
726 png_uint_32 res_x, png_uint_32 res_y, int unit_type)
727{
728 png_debug1(1, "in %s storage function", "pHYs");
729
730 if (png_ptr == NULL || info_ptr == NULL)
731 return;
732
733 info_ptr->x_pixels_per_unit = res_x;
734 info_ptr->y_pixels_per_unit = res_y;
735 info_ptr->phys_unit_type = (png_byte)unit_type;
736 info_ptr->valid |= PNG_INFO_pHYs;
737}
738#endif
739
740void PNGAPI
741png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
742 png_const_colorp palette, int num_palette)
743{
744
745 png_uint_32 max_palette_length;
746
747 png_debug1(1, "in %s storage function", "PLTE");
748
749 if (png_ptr == NULL || info_ptr == NULL)
750 return;
751
752 max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
753 (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
754
755 if (num_palette < 0 || num_palette > (int) max_palette_length)
756 {
757 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
758 png_error(png_ptr, "Invalid palette length");
759
760 else
761 {
762 png_warning(png_ptr, "Invalid palette length");
763
764 return;
765 }
766 }
767
768 if ((num_palette > 0 && palette == NULL) ||
769 (num_palette == 0
770# ifdef PNG_MNG_FEATURES_SUPPORTED
771 && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0
772# endif
773 ))
774 {
775 png_error(png_ptr, "Invalid palette");
776 }
777
778 /* It may not actually be necessary to set png_ptr->palette here;
779 * we do it for backward compatibility with the way the png_handle_tRNS
780 * function used to do the allocation.
781 *
782 * 1.6.0: the above statement appears to be incorrect; something has to set
783 * the palette inside png_struct on read.
784 */
785 png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
786
787 /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
788 * of num_palette entries, in case of an invalid PNG file or incorrect
789 * call to png_set_PLTE() with too-large sample values.
790 */
791 png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr,
792 PNG_MAX_PALETTE_LENGTH * (sizeof (png_color))));
793
794 if (num_palette > 0)
795 memcpy(png_ptr->palette, palette, (unsigned int)num_palette *
796 (sizeof (png_color)));
797
798 info_ptr->palette = png_ptr->palette;
799 info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
800 info_ptr->free_me |= PNG_FREE_PLTE;
801 info_ptr->valid |= PNG_INFO_PLTE;
802}
803
804#ifdef PNG_sBIT_SUPPORTED
805void PNGAPI
806png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr,
807 png_const_color_8p sig_bit)
808{
809 png_debug1(1, "in %s storage function", "sBIT");
810
811 if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL)
812 return;
813
814 info_ptr->sig_bit = *sig_bit;
815 info_ptr->valid |= PNG_INFO_sBIT;
816}
817#endif
818
819#ifdef PNG_sRGB_SUPPORTED
820void PNGAPI
821png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent)
822{
823 png_debug1(1, "in %s storage function", "sRGB");
824
825 if (png_ptr == NULL || info_ptr == NULL)
826 return;
827
828 info_ptr->rendering_intent = srgb_intent;
829 info_ptr->valid |= PNG_INFO_sRGB;
830}
831
832void PNGAPI
833png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr,
834 int srgb_intent)
835{
836 png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
837
838 if (png_ptr == NULL || info_ptr == NULL)
839 return;
840
841 png_set_sRGB(png_ptr, info_ptr, srgb_intent);
842
843# ifdef PNG_gAMA_SUPPORTED
844 png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE);
845# endif /* gAMA */
846
847# ifdef PNG_cHRM_SUPPORTED
848 png_set_cHRM_fixed(png_ptr, info_ptr,
849 /* color x y */
850 /* white */ 31270, 32900,
851 /* red */ 64000, 33000,
852 /* green */ 30000, 60000,
853 /* blue */ 15000, 6000);
854# endif /* cHRM */
855}
856#endif /* sRGB */
857
858
859#ifdef PNG_iCCP_SUPPORTED
860void PNGAPI
861png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
862 png_const_charp name, int compression_type,
863 png_const_bytep profile, png_uint_32 proflen)
864{
865 png_charp new_iccp_name;
866 png_bytep new_iccp_profile;
867 size_t length;
868
869 png_debug1(1, "in %s storage function", "iCCP");
870
871 if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
872 return;
873
874 if (compression_type != PNG_COMPRESSION_TYPE_BASE)
875 png_app_error(png_ptr, "Invalid iCCP compression method");
876
877 length = strlen(name)+1;
878 new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length));
879
880 if (new_iccp_name == NULL)
881 {
882 png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk");
883
884 return;
885 }
886
887 memcpy(new_iccp_name, name, length);
888 new_iccp_profile = png_voidcast(png_bytep,
889 png_malloc_warn(png_ptr, proflen));
890
891 if (new_iccp_profile == NULL)
892 {
893 png_free(png_ptr, new_iccp_name);
894 png_benign_error(png_ptr,
895 "Insufficient memory to process iCCP profile");
896
897 return;
898 }
899
900 memcpy(new_iccp_profile, profile, proflen);
901
902 png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
903
904 info_ptr->iccp_proflen = proflen;
905 info_ptr->iccp_name = new_iccp_name;
906 info_ptr->iccp_profile = new_iccp_profile;
907 info_ptr->free_me |= PNG_FREE_ICCP;
908 info_ptr->valid |= PNG_INFO_iCCP;
909}
910#endif
911
912#ifdef PNG_TEXT_SUPPORTED
913void PNGAPI
914png_set_text(png_const_structrp png_ptr, png_inforp info_ptr,
915 png_const_textp text_ptr, int num_text)
916{
917 int ret;
918 ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
919
920 if (ret != 0)
921 png_error(png_ptr, "Insufficient memory to store text");
922}
923
924int /* PRIVATE */
925png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
926 png_const_textp text_ptr, int num_text)
927{
928 int i;
929
930 png_debug1(1, "in text storage function, chunk typeid = 0x%lx",
931 png_ptr == NULL ? 0xabadca11UL : (unsigned long)png_ptr->chunk_name);
932
933 if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL)
934 return 0;
935
936 /* Make sure we have enough space in the "text" array in info_struct
937 * to hold all of the incoming text_ptr objects. This compare can't overflow
938 * because max_text >= num_text (anyway, subtract of two positive integers
939 * can't overflow in any case.)
940 */
941 if (num_text > info_ptr->max_text - info_ptr->num_text)
942 {
943 int old_num_text = info_ptr->num_text;
944 int max_text;
945 png_textp new_text = NULL;
946
947 /* Calculate an appropriate max_text, checking for overflow. */
948 max_text = old_num_text;
949 if (num_text <= INT_MAX - max_text)
950 {
951 max_text += num_text;
952
953 /* Round up to a multiple of 8 */
954 if (max_text < INT_MAX-8)
955 max_text = (max_text + 8) & ~0x7;
956
957 else
958 max_text = INT_MAX;
959
960 /* Now allocate a new array and copy the old members in; this does all
961 * the overflow checks.
962 */
963 new_text = png_voidcast(png_textp,png_realloc_array(png_ptr,
964 info_ptr->text, old_num_text, max_text-old_num_text,
965 sizeof *new_text));
966 }
967
968 if (new_text == NULL)
969 {
970 png_chunk_report(png_ptr, "too many text chunks",
971 PNG_CHUNK_WRITE_ERROR);
972
973 return 1;
974 }
975
976 png_free(png_ptr, info_ptr->text);
977
978 info_ptr->text = new_text;
979 info_ptr->free_me |= PNG_FREE_TEXT;
980 info_ptr->max_text = max_text;
981 /* num_text is adjusted below as the entries are copied in */
982
983 png_debug1(3, "allocated %d entries for info_ptr->text", max_text);
984 }
985
986 for (i = 0; i < num_text; i++)
987 {
988 size_t text_length, key_len;
989 size_t lang_len, lang_key_len;
990 png_textp textp = &(info_ptr->text[info_ptr->num_text]);
991
992 if (text_ptr[i].key == NULL)
993 continue;
994
995 if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
996 text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
997 {
998 png_chunk_report(png_ptr, "text compression mode is out of range",
999 PNG_CHUNK_WRITE_ERROR);
1000 continue;
1001 }
1002
1003 key_len = strlen(text_ptr[i].key);
1004
1005 if (text_ptr[i].compression <= 0)
1006 {
1007 lang_len = 0;
1008 lang_key_len = 0;
1009 }
1010
1011 else
1012# ifdef PNG_iTXt_SUPPORTED
1013 {
1014 /* Set iTXt data */
1015
1016 if (text_ptr[i].lang != NULL)
1017 lang_len = strlen(text_ptr[i].lang);
1018
1019 else
1020 lang_len = 0;
1021
1022 if (text_ptr[i].lang_key != NULL)
1023 lang_key_len = strlen(text_ptr[i].lang_key);
1024
1025 else
1026 lang_key_len = 0;
1027 }
1028# else /* iTXt */
1029 {
1030 png_chunk_report(png_ptr, "iTXt chunk not supported",
1031 PNG_CHUNK_WRITE_ERROR);
1032 continue;
1033 }
1034# endif
1035
1036 if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
1037 {
1038 text_length = 0;
1039# ifdef PNG_iTXt_SUPPORTED
1040 if (text_ptr[i].compression > 0)
1041 textp->compression = PNG_ITXT_COMPRESSION_NONE;
1042
1043 else
1044# endif
1045 textp->compression = PNG_TEXT_COMPRESSION_NONE;
1046 }
1047
1048 else
1049 {
1050 text_length = strlen(text_ptr[i].text);
1051 textp->compression = text_ptr[i].compression;
1052 }
1053
1054 textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr,
1055 key_len + text_length + lang_len + lang_key_len + 4));
1056
1057 if (textp->key == NULL)
1058 {
1059 png_chunk_report(png_ptr, "text chunk: out of memory",
1060 PNG_CHUNK_WRITE_ERROR);
1061
1062 return 1;
1063 }
1064
1065 png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
1066 (unsigned long)(png_uint_32)
1067 (key_len + lang_len + lang_key_len + text_length + 4),
1068 textp->key);
1069
1070 memcpy(textp->key, text_ptr[i].key, key_len);
1071 *(textp->key + key_len) = '\0';
1072
1073 if (text_ptr[i].compression > 0)
1074 {
1075 textp->lang = textp->key + key_len + 1;
1076 memcpy(textp->lang, text_ptr[i].lang, lang_len);
1077 *(textp->lang + lang_len) = '\0';
1078 textp->lang_key = textp->lang + lang_len + 1;
1079 memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
1080 *(textp->lang_key + lang_key_len) = '\0';
1081 textp->text = textp->lang_key + lang_key_len + 1;
1082 }
1083
1084 else
1085 {
1086 textp->lang=NULL;
1087 textp->lang_key=NULL;
1088 textp->text = textp->key + key_len + 1;
1089 }
1090
1091 if (text_length != 0)
1092 memcpy(textp->text, text_ptr[i].text, text_length);
1093
1094 *(textp->text + text_length) = '\0';
1095
1096# ifdef PNG_iTXt_SUPPORTED
1097 if (textp->compression > 0)
1098 {
1099 textp->text_length = 0;
1100 textp->itxt_length = text_length;
1101 }
1102
1103 else
1104# endif
1105 {
1106 textp->text_length = text_length;
1107 textp->itxt_length = 0;
1108 }
1109
1110 info_ptr->num_text++;
1111 png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
1112 }
1113
1114 return 0;
1115}
1116#endif
1117
1118#ifdef PNG_tIME_SUPPORTED
1119void PNGAPI
1120png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr,
1121 png_const_timep mod_time)
1122{
1123 png_debug1(1, "in %s storage function", "tIME");
1124
1125 if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL ||
1126 (png_ptr->mode & PNG_WROTE_tIME) != 0)
1127 return;
1128
1129 if (mod_time->month == 0 || mod_time->month > 12 ||
1130 mod_time->day == 0 || mod_time->day > 31 ||
1131 mod_time->hour > 23 || mod_time->minute > 59 ||
1132 mod_time->second > 60)
1133 {
1134 png_warning(png_ptr, "Ignoring invalid time value");
1135
1136 return;
1137 }
1138
1139 info_ptr->mod_time = *mod_time;
1140 info_ptr->valid |= PNG_INFO_tIME;
1141}
1142#endif
1143
1144#ifdef PNG_tRNS_SUPPORTED
1145void PNGAPI
1146png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
1147 png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
1148{
1149 png_debug1(1, "in %s storage function", "tRNS");
1150
1151 if (png_ptr == NULL || info_ptr == NULL)
1152
1153 return;
1154
1155 if (trans_alpha != NULL)
1156 {
1157 /* It may not actually be necessary to set png_ptr->trans_alpha here;
1158 * we do it for backward compatibility with the way the png_handle_tRNS
1159 * function used to do the allocation.
1160 *
1161 * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively
1162 * relies on png_set_tRNS storing the information in png_struct
1163 * (otherwise it won't be there for the code in pngrtran.c).
1164 */
1165
1166 png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
1167
1168 if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
1169 {
1170 /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
1171 info_ptr->trans_alpha = png_voidcast(png_bytep,
1172 png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
1173 memcpy(info_ptr->trans_alpha, trans_alpha, (size_t)num_trans);
1174
1175 info_ptr->free_me |= PNG_FREE_TRNS;
1176 info_ptr->valid |= PNG_INFO_tRNS;
1177 }
1178 png_ptr->trans_alpha = info_ptr->trans_alpha;
1179 }
1180
1181 if (trans_color != NULL)
1182 {
1183#ifdef PNG_WARNINGS_SUPPORTED
1184 if (info_ptr->bit_depth < 16)
1185 {
1186 int sample_max = (1 << info_ptr->bit_depth) - 1;
1187
1188 if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
1189 trans_color->gray > sample_max) ||
1190 (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
1191 (trans_color->red > sample_max ||
1192 trans_color->green > sample_max ||
1193 trans_color->blue > sample_max)))
1194 png_warning(png_ptr,
1195 "tRNS chunk has out-of-range samples for bit_depth");
1196 }
1197#endif
1198
1199 info_ptr->trans_color = *trans_color;
1200
1201 if (num_trans == 0)
1202 num_trans = 1;
1203 }
1204
1205 info_ptr->num_trans = (png_uint_16)num_trans;
1206
1207 if (num_trans != 0)
1208 {
1209 info_ptr->free_me |= PNG_FREE_TRNS;
1210 info_ptr->valid |= PNG_INFO_tRNS;
1211 }
1212}
1213#endif
1214
1215#ifdef PNG_sPLT_SUPPORTED
1216void PNGAPI
1217png_set_sPLT(png_const_structrp png_ptr,
1218 png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)
1219/*
1220 * entries - array of png_sPLT_t structures
1221 * to be added to the list of palettes
1222 * in the info structure.
1223 *
1224 * nentries - number of palette structures to be
1225 * added.
1226 */
1227{
1228 png_sPLT_tp np;
1229
1230 png_debug1(1, "in %s storage function", "sPLT");
1231
1232 if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL)
1233 return;
1234
1235 /* Use the internal realloc function, which checks for all the possible
1236 * overflows. Notice that the parameters are (int) and (size_t)
1237 */
1238 np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr,
1239 info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries,
1240 sizeof *np));
1241
1242 if (np == NULL)
1243 {
1244 /* Out of memory or too many chunks */
1245 png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR);
1246 return;
1247 }
1248
1249 png_free(png_ptr, info_ptr->splt_palettes);
1250
1251 info_ptr->splt_palettes = np;
1252 info_ptr->free_me |= PNG_FREE_SPLT;
1253
1254 np += info_ptr->splt_palettes_num;
1255
1256 do
1257 {
1258 size_t length;
1259
1260 /* Skip invalid input entries */
1261 if (entries->name == NULL || entries->entries == NULL)
1262 {
1263 /* png_handle_sPLT doesn't do this, so this is an app error */
1264 png_app_error(png_ptr, "png_set_sPLT: invalid sPLT");
1265 /* Just skip the invalid entry */
1266 continue;
1267 }
1268
1269 np->depth = entries->depth;
1270
1271 /* In the event of out-of-memory just return - there's no point keeping
1272 * on trying to add sPLT chunks.
1273 */
1274 length = strlen(entries->name) + 1;
1275 np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length));
1276
1277 if (np->name == NULL)
1278 break;
1279
1280 memcpy(np->name, entries->name, length);
1281
1282 /* IMPORTANT: we have memory now that won't get freed if something else
1283 * goes wrong; this code must free it. png_malloc_array produces no
1284 * warnings; use a png_chunk_report (below) if there is an error.
1285 */
1286 np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr,
1287 entries->nentries, sizeof (png_sPLT_entry)));
1288
1289 if (np->entries == NULL)
1290 {
1291 png_free(png_ptr, np->name);
1292 np->name = NULL;
1293 break;
1294 }
1295
1296 np->nentries = entries->nentries;
1297 /* This multiply can't overflow because png_malloc_array has already
1298 * checked it when doing the allocation.
1299 */
1300 memcpy(np->entries, entries->entries,
1301 (unsigned int)entries->nentries * sizeof (png_sPLT_entry));
1302
1303 /* Note that 'continue' skips the advance of the out pointer and out
1304 * count, so an invalid entry is not added.
1305 */
1306 info_ptr->valid |= PNG_INFO_sPLT;
1307 ++(info_ptr->splt_palettes_num);
1308 ++np;
1309 ++entries;
1310 }
1311 while (--nentries);
1312
1313 if (nentries > 0)
1314 png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR);
1315}
1316#endif /* sPLT */
1317
1318#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1319static png_byte
1320check_location(png_const_structrp png_ptr, int location)
1321{
1322 location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT);
1323
1324 /* New in 1.6.0; copy the location and check it. This is an API
1325 * change; previously the app had to use the
1326 * png_set_unknown_chunk_location API below for each chunk.
1327 */
1328 if (location == 0 && (png_ptr->mode & PNG_IS_READ_STRUCT) == 0)
1329 {
1330 /* Write struct, so unknown chunks come from the app */
1331 png_app_warning(png_ptr,
1332 "png_set_unknown_chunks now expects a valid location");
1333 /* Use the old behavior */
1334 location = (png_byte)(png_ptr->mode &
1335 (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT));
1336 }
1337
1338 /* This need not be an internal error - if the app calls
1339 * png_set_unknown_chunks on a read pointer it must get the location right.
1340 */
1341 if (location == 0)
1342 png_error(png_ptr, "invalid location in png_set_unknown_chunks");
1343
1344 /* Now reduce the location to the top-most set bit by removing each least
1345 * significant bit in turn.
1346 */
1347 while (location != (location & -location))
1348 location &= ~(location & -location);
1349
1350 /* The cast is safe because 'location' is a bit mask and only the low four
1351 * bits are significant.
1352 */
1353 return (png_byte)location;
1354}
1355
1356void PNGAPI
1357png_set_unknown_chunks(png_const_structrp png_ptr,
1358 png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
1359{
1360 png_unknown_chunkp np;
1361
1362 if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 ||
1363 unknowns == NULL)
1364 return;
1365
1366 /* Check for the failure cases where support has been disabled at compile
1367 * time. This code is hardly ever compiled - it's here because
1368 * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this
1369 * code) but may be meaningless if the read or write handling of unknown
1370 * chunks is not compiled in.
1371 */
1372# if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \
1373 defined(PNG_READ_SUPPORTED)
1374 if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
1375 {
1376 png_app_error(png_ptr, "no unknown chunk support on read");
1377
1378 return;
1379 }
1380# endif
1381# if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \
1382 defined(PNG_WRITE_SUPPORTED)
1383 if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0)
1384 {
1385 png_app_error(png_ptr, "no unknown chunk support on write");
1386
1387 return;
1388 }
1389# endif
1390
1391 /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that
1392 * unknown critical chunks could be lost with just a warning resulting in
1393 * undefined behavior. Now png_chunk_report is used to provide behavior
1394 * appropriate to read or write.
1395 */
1396 np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr,
1397 info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns,
1398 sizeof *np));
1399
1400 if (np == NULL)
1401 {
1402 png_chunk_report(png_ptr, "too many unknown chunks",
1403 PNG_CHUNK_WRITE_ERROR);
1404 return;
1405 }
1406
1407 png_free(png_ptr, info_ptr->unknown_chunks);
1408
1409 info_ptr->unknown_chunks = np; /* safe because it is initialized */
1410 info_ptr->free_me |= PNG_FREE_UNKN;
1411
1412 np += info_ptr->unknown_chunks_num;
1413
1414 /* Increment unknown_chunks_num each time round the loop to protect the
1415 * just-allocated chunk data.
1416 */
1417 for (; num_unknowns > 0; --num_unknowns, ++unknowns)
1418 {
1419 memcpy(np->name, unknowns->name, (sizeof np->name));
1420 np->name[(sizeof np->name)-1] = '\0';
1421 np->location = check_location(png_ptr, unknowns->location);
1422
1423 if (unknowns->size == 0)
1424 {
1425 np->data = NULL;
1426 np->size = 0;
1427 }
1428
1429 else
1430 {
1431 np->data = png_voidcast(png_bytep,
1432 png_malloc_base(png_ptr, unknowns->size));
1433
1434 if (np->data == NULL)
1435 {
1436 png_chunk_report(png_ptr, "unknown chunk: out of memory",
1437 PNG_CHUNK_WRITE_ERROR);
1438 /* But just skip storing the unknown chunk */
1439 continue;
1440 }
1441
1442 memcpy(np->data, unknowns->data, unknowns->size);
1443 np->size = unknowns->size;
1444 }
1445
1446 /* These increments are skipped on out-of-memory for the data - the
1447 * unknown chunk entry gets overwritten if the png_chunk_report returns.
1448 * This is correct in the read case (the chunk is just dropped.)
1449 */
1450 ++np;
1451 ++(info_ptr->unknown_chunks_num);
1452 }
1453}
1454
1455void PNGAPI
1456png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
1457 int chunk, int location)
1458{
1459 /* This API is pretty pointless in 1.6.0 because the location can be set
1460 * before the call to png_set_unknown_chunks.
1461 *
1462 * TODO: add a png_app_warning in 1.7
1463 */
1464 if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 &&
1465 chunk < info_ptr->unknown_chunks_num)
1466 {
1467 if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0)
1468 {
1469 png_app_error(png_ptr, "invalid unknown chunk location");
1470 /* Fake out the pre 1.6.0 behavior: */
1471 if (((unsigned int)location & PNG_HAVE_IDAT) != 0) /* undocumented! */
1472 location = PNG_AFTER_IDAT;
1473
1474 else
1475 location = PNG_HAVE_IHDR; /* also undocumented */
1476 }
1477
1478 info_ptr->unknown_chunks[chunk].location =
1479 check_location(png_ptr, location);
1480 }
1481}
1482#endif /* STORE_UNKNOWN_CHUNKS */
1483
1484#ifdef PNG_MNG_FEATURES_SUPPORTED
1485png_uint_32 PNGAPI
1486png_permit_mng_features(png_structrp png_ptr, png_uint_32 mng_features)
1487{
1488 png_debug(1, "in png_permit_mng_features");
1489
1490 if (png_ptr == NULL)
1491 return 0;
1492
1493 png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES;
1494
1495 return png_ptr->mng_features_permitted;
1496}
1497#endif
1498
1499#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1500static unsigned int
1501add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep)
1502{
1503 unsigned int i;
1504
1505 /* Utility function: update the 'keep' state of a chunk if it is already in
1506 * the list, otherwise add it to the list.
1507 */
1508 for (i=0; i<count; ++i, list += 5)
1509 {
1510 if (memcmp(list, add, 4) == 0)
1511 {
1512 list[4] = (png_byte)keep;
1513
1514 return count;
1515 }
1516 }
1517
1518 if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT)
1519 {
1520 ++count;
1521 memcpy(list, add, 4);
1522 list[4] = (png_byte)keep;
1523 }
1524
1525 return count;
1526}
1527
1528void PNGAPI
1529png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
1530 png_const_bytep chunk_list, int num_chunks_in)
1531{
1532 png_bytep new_list;
1533 unsigned int num_chunks, old_num_chunks;
1534
1535 if (png_ptr == NULL)
1536 return;
1537
1538 if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST)
1539 {
1540 png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep");
1541
1542 return;
1543 }
1544
1545 if (num_chunks_in <= 0)
1546 {
1547 png_ptr->unknown_default = keep;
1548
1549 /* '0' means just set the flags, so stop here */
1550 if (num_chunks_in == 0)
1551 return;
1552 }
1553
1554 if (num_chunks_in < 0)
1555 {
1556 /* Ignore all unknown chunks and all chunks recognized by
1557 * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND
1558 */
1559 static const png_byte chunks_to_ignore[] = {
1560 98, 75, 71, 68, '\0', /* bKGD */
1561 99, 72, 82, 77, '\0', /* cHRM */
1562 99, 73, 67, 80, '\0', /* cICP */
1563 99, 76, 76, 73, '\0', /* cLLI */
1564 101, 88, 73, 102, '\0', /* eXIf */
1565 103, 65, 77, 65, '\0', /* gAMA */
1566 104, 73, 83, 84, '\0', /* hIST */
1567 105, 67, 67, 80, '\0', /* iCCP */
1568 105, 84, 88, 116, '\0', /* iTXt */
1569 109, 68, 67, 86, '\0', /* mDCV */
1570 111, 70, 70, 115, '\0', /* oFFs */
1571 112, 67, 65, 76, '\0', /* pCAL */
1572 112, 72, 89, 115, '\0', /* pHYs */
1573 115, 66, 73, 84, '\0', /* sBIT */
1574 115, 67, 65, 76, '\0', /* sCAL */
1575 115, 80, 76, 84, '\0', /* sPLT */
1576 115, 84, 69, 82, '\0', /* sTER */
1577 115, 82, 71, 66, '\0', /* sRGB */
1578 116, 69, 88, 116, '\0', /* tEXt */
1579 116, 73, 77, 69, '\0', /* tIME */
1580 122, 84, 88, 116, '\0' /* zTXt */
1581 };
1582
1583 chunk_list = chunks_to_ignore;
1584 num_chunks = (unsigned int)/*SAFE*/(sizeof chunks_to_ignore)/5U;
1585 }
1586
1587 else /* num_chunks_in > 0 */
1588 {
1589 if (chunk_list == NULL)
1590 {
1591 /* Prior to 1.6.0 this was silently ignored, now it is an app_error
1592 * which can be switched off.
1593 */
1594 png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list");
1595
1596 return;
1597 }
1598
1599 num_chunks = (unsigned int)num_chunks_in;
1600 }
1601
1602 old_num_chunks = png_ptr->num_chunk_list;
1603 if (png_ptr->chunk_list == NULL)
1604 old_num_chunks = 0;
1605
1606 /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow.
1607 */
1608 if (num_chunks + old_num_chunks > UINT_MAX/5)
1609 {
1610 png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks");
1611
1612 return;
1613 }
1614
1615 /* If these chunks are being reset to the default then no more memory is
1616 * required because add_one_chunk above doesn't extend the list if the 'keep'
1617 * parameter is the default.
1618 */
1619 if (keep != 0)
1620 {
1621 new_list = png_voidcast(png_bytep, png_malloc(png_ptr,
1622 5 * (num_chunks + old_num_chunks)));
1623
1624 if (old_num_chunks > 0)
1625 memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks);
1626 }
1627
1628 else if (old_num_chunks > 0)
1629 new_list = png_ptr->chunk_list;
1630
1631 else
1632 new_list = NULL;
1633
1634 /* Add the new chunks together with each one's handling code. If the chunk
1635 * already exists the code is updated, otherwise the chunk is added to the
1636 * end. (In libpng 1.6.0 order no longer matters because this code enforces
1637 * the earlier convention that the last setting is the one that is used.)
1638 */
1639 if (new_list != NULL)
1640 {
1641 png_const_bytep inlist;
1642 png_bytep outlist;
1643 unsigned int i;
1644
1645 for (i=0; i<num_chunks; ++i)
1646 {
1647 old_num_chunks = add_one_chunk(new_list, old_num_chunks,
1648 chunk_list+5*i, keep);
1649 }
1650
1651 /* Now remove any spurious 'default' entries. */
1652 num_chunks = 0;
1653 for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5)
1654 {
1655 if (inlist[4])
1656 {
1657 if (outlist != inlist)
1658 memcpy(outlist, inlist, 5);
1659 outlist += 5;
1660 ++num_chunks;
1661 }
1662 }
1663
1664 /* This means the application has removed all the specialized handling. */
1665 if (num_chunks == 0)
1666 {
1667 if (png_ptr->chunk_list != new_list)
1668 png_free(png_ptr, new_list);
1669
1670 new_list = NULL;
1671 }
1672 }
1673
1674 else
1675 num_chunks = 0;
1676
1677 png_ptr->num_chunk_list = num_chunks;
1678
1679 if (png_ptr->chunk_list != new_list)
1680 {
1681 if (png_ptr->chunk_list != NULL)
1682 png_free(png_ptr, png_ptr->chunk_list);
1683
1684 png_ptr->chunk_list = new_list;
1685 }
1686}
1687#endif
1688
1689#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1690void PNGAPI
1691png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr,
1692 png_user_chunk_ptr read_user_chunk_fn)
1693{
1694 png_debug(1, "in png_set_read_user_chunk_fn");
1695
1696 if (png_ptr == NULL)
1697 return;
1698
1699 png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1700 png_ptr->user_chunk_ptr = user_chunk_ptr;
1701}
1702#endif
1703
1704#ifdef PNG_INFO_IMAGE_SUPPORTED
1705void PNGAPI
1706png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr,
1707 png_bytepp row_pointers)
1708{
1709 png_debug(1, "in png_set_rows");
1710
1711 if (png_ptr == NULL || info_ptr == NULL)
1712 return;
1713
1714 if (info_ptr->row_pointers != NULL &&
1715 (info_ptr->row_pointers != row_pointers))
1716 png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1717
1718 info_ptr->row_pointers = row_pointers;
1719
1720 if (row_pointers != NULL)
1721 info_ptr->valid |= PNG_INFO_IDAT;
1722}
1723#endif
1724
1725void PNGAPI
1726png_set_compression_buffer_size(png_structrp png_ptr, size_t size)
1727{
1728 png_debug(1, "in png_set_compression_buffer_size");
1729
1730 if (png_ptr == NULL)
1731 return;
1732
1733 if (size == 0 || size > PNG_UINT_31_MAX)
1734 png_error(png_ptr, "invalid compression buffer size");
1735
1736# ifdef PNG_SEQUENTIAL_READ_SUPPORTED
1737 if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
1738 {
1739 png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */
1740 return;
1741 }
1742# endif
1743
1744# ifdef PNG_WRITE_SUPPORTED
1745 if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0)
1746 {
1747 if (png_ptr->zowner != 0)
1748 {
1749 png_warning(png_ptr,
1750 "Compression buffer size cannot be changed because it is in use");
1751
1752 return;
1753 }
1754
1755#ifndef __COVERITY__
1756 /* Some compilers complain that this is always false. However, it
1757 * can be true when integer overflow happens.
1758 */
1759 if (size > ZLIB_IO_MAX)
1760 {
1761 png_warning(png_ptr,
1762 "Compression buffer size limited to system maximum");
1763 size = ZLIB_IO_MAX; /* must fit */
1764 }
1765#endif
1766
1767 if (size < 6)
1768 {
1769 /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH
1770 * if this is permitted.
1771 */
1772 png_warning(png_ptr,
1773 "Compression buffer size cannot be reduced below 6");
1774
1775 return;
1776 }
1777
1778 if (png_ptr->zbuffer_size != size)
1779 {
1780 png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list);
1781 png_ptr->zbuffer_size = (uInt)size;
1782 }
1783 }
1784# endif
1785}
1786
1787void PNGAPI
1788png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask)
1789{
1790 if (png_ptr != NULL && info_ptr != NULL)
1791 info_ptr->valid &= (unsigned int)(~mask);
1792}
1793
1794
1795#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1796/* This function was added to libpng 1.2.6 */
1797void PNGAPI
1798png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max,
1799 png_uint_32 user_height_max)
1800{
1801 png_debug(1, "in png_set_user_limits");
1802
1803 /* Images with dimensions larger than these limits will be
1804 * rejected by png_set_IHDR(). To accept any PNG datastream
1805 * regardless of dimensions, set both limits to 0x7fffffff.
1806 */
1807 if (png_ptr == NULL)
1808 return;
1809
1810 png_ptr->user_width_max = user_width_max;
1811 png_ptr->user_height_max = user_height_max;
1812}
1813
1814/* This function was added to libpng 1.4.0 */
1815void PNGAPI
1816png_set_chunk_cache_max(png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
1817{
1818 png_debug(1, "in png_set_chunk_cache_max");
1819
1820 if (png_ptr != NULL)
1821 png_ptr->user_chunk_cache_max = user_chunk_cache_max;
1822}
1823
1824/* This function was added to libpng 1.4.1 */
1825void PNGAPI
1826png_set_chunk_malloc_max(png_structrp png_ptr,
1827 png_alloc_size_t user_chunk_malloc_max)
1828{
1829 png_debug(1, "in png_set_chunk_malloc_max");
1830
1831 /* pngstruct::user_chunk_malloc_max is initialized to a non-zero value in
1832 * png.c. This API supports '0' for unlimited, make sure the correct
1833 * (unlimited) value is set here to avoid a need to check for 0 everywhere
1834 * the parameter is used.
1835 */
1836 if (png_ptr != NULL)
1837 {
1838 if (user_chunk_malloc_max == 0U) /* unlimited */
1839 {
1840# ifdef PNG_MAX_MALLOC_64K
1841 png_ptr->user_chunk_malloc_max = 65536U;
1842# else
1843 png_ptr->user_chunk_malloc_max = PNG_SIZE_MAX;
1844# endif
1845 }
1846 else
1847 png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
1848 }
1849}
1850#endif /* ?SET_USER_LIMITS */
1851
1852
1853#ifdef PNG_BENIGN_ERRORS_SUPPORTED
1854void PNGAPI
1855png_set_benign_errors(png_structrp png_ptr, int allowed)
1856{
1857 png_debug(1, "in png_set_benign_errors");
1858
1859 /* If allowed is 1, png_benign_error() is treated as a warning.
1860 *
1861 * If allowed is 0, png_benign_error() is treated as an error (which
1862 * is the default behavior if png_set_benign_errors() is not called).
1863 */
1864
1865 if (allowed != 0)
1866 png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN |
1867 PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN;
1868
1869 else
1870 png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN |
1871 PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN);
1872}
1873#endif /* BENIGN_ERRORS */
1874
1875#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
1876 /* Whether to report invalid palette index; added at libng-1.5.10.
1877 * It is possible for an indexed (color-type==3) PNG file to contain
1878 * pixels with invalid (out-of-range) indexes if the PLTE chunk has
1879 * fewer entries than the image's bit-depth would allow. We recover
1880 * from this gracefully by filling any incomplete palette with zeros
1881 * (opaque black). By default, when this occurs libpng will issue
1882 * a benign error. This API can be used to override that behavior.
1883 */
1884void PNGAPI
1885png_set_check_for_invalid_index(png_structrp png_ptr, int allowed)
1886{
1887 png_debug(1, "in png_set_check_for_invalid_index");
1888
1889 if (allowed > 0)
1890 png_ptr->num_palette_max = 0;
1891
1892 else
1893 png_ptr->num_palette_max = -1;
1894}
1895#endif
1896
1897#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \
1898 defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
1899/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
1900 * and if invalid, correct the keyword rather than discarding the entire
1901 * chunk. The PNG 1.0 specification requires keywords 1-79 characters in
1902 * length, forbids leading or trailing whitespace, multiple internal spaces,
1903 * and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
1904 *
1905 * The 'new_key' buffer must be 80 characters in size (for the keyword plus a
1906 * trailing '\0'). If this routine returns 0 then there was no keyword, or a
1907 * valid one could not be generated, and the caller must png_error.
1908 */
1909png_uint_32 /* PRIVATE */
1910png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
1911{
1912#ifdef PNG_WARNINGS_SUPPORTED
1913 png_const_charp orig_key = key;
1914#endif
1915 png_uint_32 key_len = 0;
1916 int bad_character = 0;
1917 int space = 1;
1918
1919 png_debug(1, "in png_check_keyword");
1920
1921 if (key == NULL)
1922 {
1923 *new_key = 0;
1924 return 0;
1925 }
1926
1927 while (*key && key_len < 79)
1928 {
1929 png_byte ch = (png_byte)*key++;
1930
1931 if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
1932 {
1933 *new_key++ = ch; ++key_len; space = 0;
1934 }
1935
1936 else if (space == 0)
1937 {
1938 /* A space or an invalid character when one wasn't seen immediately
1939 * before; output just a space.
1940 */
1941 *new_key++ = 32; ++key_len; space = 1;
1942
1943 /* If the character was not a space then it is invalid. */
1944 if (ch != 32)
1945 bad_character = ch;
1946 }
1947
1948 else if (bad_character == 0)
1949 bad_character = ch; /* just skip it, record the first error */
1950 }
1951
1952 if (key_len > 0 && space != 0) /* trailing space */
1953 {
1954 --key_len; --new_key;
1955 if (bad_character == 0)
1956 bad_character = 32;
1957 }
1958
1959 /* Terminate the keyword */
1960 *new_key = 0;
1961
1962 if (key_len == 0)
1963 return 0;
1964
1965#ifdef PNG_WARNINGS_SUPPORTED
1966 /* Try to only output one warning per keyword: */
1967 if (*key != 0) /* keyword too long */
1968 png_warning(png_ptr, "keyword truncated");
1969
1970 else if (bad_character != 0)
1971 {
1972 PNG_WARNING_PARAMETERS(p)
1973
1974 png_warning_parameter(p, 1, orig_key);
1975 png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character);
1976
1977 png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'");
1978 }
1979#else /* !WARNINGS */
1980 PNG_UNUSED(png_ptr)
1981#endif /* !WARNINGS */
1982
1983 return key_len;
1984}
1985#endif /* TEXT || pCAL || iCCP || sPLT */
1986#endif /* READ || WRITE */
png_XYZ
Definition pngstruct.h:90
png_xy
Definition pngstruct.h:79