1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /* pngconf.h - machine configurable file for libpng
26 *
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file and, per its terms, should not be removed:
31 *
32 * libpng version 1.6.23, June 9, 2016
33 *
34 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
35 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
36 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
37 *
38 * This code is released under the libpng license.
39 * For conditions of distribution and use, see the disclaimer
40 * and license in png.h
41 *
42 * Any machine specific code is near the front of this file, so if you
43 * are configuring libpng for a machine, you may want to read the section
44 * starting here down to where it starts to typedef png_color, png_text,
45 * and png_info.
46 */
47
48 #ifndef PNGCONF_H
49 #define PNGCONF_H
50
51 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
52
53 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
54 * compiler for correct compilation. The following header files are required by
55 * the standard. If your compiler doesn't provide these header files, or they
56 * do not match the standard, you will need to provide/improve them.
57 */
58 #include <limits.h>
59 #include <stddef.h>
60
61 /* Library header files. These header files are all defined by ISOC90; libpng
62 * expects conformant implementations, however, an ISOC90 conformant system need
63 * not provide these header files if the functionality cannot be implemented.
64 * In this case it will be necessary to disable the relevant parts of libpng in
65 * the build of pnglibconf.h.
66 *
67 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
68 * include this unnecessary header file.
69 */
70
71 #ifdef PNG_STDIO_SUPPORTED
72 /* Required for the definition of FILE: */
73 # include <stdio.h>
74 #endif
75
76 #ifdef PNG_SETJMP_SUPPORTED
77 /* Required for the definition of jmp_buf and the declaration of longjmp: */
78 # include <setjmp.h>
79 #endif
80
81 #ifdef PNG_CONVERT_tIME_SUPPORTED
82 /* Required for struct tm: */
83 # include <time.h>
84 #endif
85
86 #endif /* PNG_BUILDING_SYMBOL_TABLE */
87
88 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
89 * PNG_NO_CONST; this is no longer supported except for data declarations which
90 * apparently still cause problems in 2011 on some compilers.
91 */
92 #define PNG_CONST const /* backward compatibility only */
93
94 /* This controls optimization of the reading of 16-bit and 32-bit values
95 * from PNG files. It can be set on a per-app-file basis - it
96 * just changes whether a macro is used when the function is called.
97 * The library builder sets the default; if read functions are not
98 * built into the library the macro implementation is forced on.
99 */
100 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
101 # define PNG_USE_READ_MACROS
102 #endif
103 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
104 # if PNG_DEFAULT_READ_MACROS
105 # define PNG_USE_READ_MACROS
106 # endif
107 #endif
108
109 /* COMPILER SPECIFIC OPTIONS.
110 *
111 * These options are provided so that a variety of difficult compilers
112 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
113 * below) but still have compiler specific implementations, others
114 * may be changed on a per-file basis when compiling against libpng.
115 */
116
117 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
118 * against legacy (pre ISOC90) compilers that did not understand function
119 * prototypes. It is not required for modern C compilers.
120 */
121 #ifndef PNGARG
122 # define PNGARG(arglist) arglist
123 #endif
124
125 /* Function calling conventions.
126 * =============================
127 * Normally it is not necessary to specify to the compiler how to call
128 * a function - it just does it - however on x86 systems derived from
129 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
130 * and some others) there are multiple ways to call a function and the
131 * default can be changed on the compiler command line. For this reason
132 * libpng specifies the calling convention of every exported function and
133 * every function called via a user supplied function pointer. This is
134 * done in this file by defining the following macros:
135 *
136 * PNGAPI Calling convention for exported functions.
137 * PNGCBAPI Calling convention for user provided (callback) functions.
138 * PNGCAPI Calling convention used by the ANSI-C library (required
139 * for longjmp callbacks and sometimes used internally to
140 * specify the calling convention for zlib).
141 *
142 * These macros should never be overridden. If it is necessary to
143 * change calling convention in a private build this can be done
144 * by setting PNG_API_RULE (which defaults to 0) to one of the values
145 * below to select the correct 'API' variants.
146 *
147 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
148 * This is correct in every known environment.
149 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
150 * the 'C' calling convention (from PNGCAPI) for
151 * callbacks (PNGCBAPI). This is no longer required
152 * in any known environment - if it has to be used
153 * please post an explanation of the problem to the
154 * libpng mailing list.
155 *
156 * These cases only differ if the operating system does not use the C
157 * calling convention, at present this just means the above cases
158 * (x86 DOS/Windows sytems) and, even then, this does not apply to
159 * Cygwin running on those systems.
160 *
161 * Note that the value must be defined in pnglibconf.h so that what
162 * the application uses to call the library matches the conventions
163 * set when building the library.
164 */
165
166 /* Symbol export
167 * =============
168 * When building a shared library it is almost always necessary to tell
169 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
170 * is used to mark the symbols. On some systems these symbols can be
171 * extracted at link time and need no special processing by the compiler,
172 * on other systems the symbols are flagged by the compiler and just
173 * the declaration requires a special tag applied (unfortunately) in a
174 * compiler dependent way. Some systems can do either.
175 *
176 * A small number of older systems also require a symbol from a DLL to
177 * be flagged to the program that calls it. This is a problem because
178 * we do not know in the header file included by application code that
179 * the symbol will come from a shared library, as opposed to a statically
180 * linked one. For this reason the application must tell us by setting
181 * the magic flag PNG_USE_DLL to turn on the special processing before
182 * it includes png.h.
183 *
184 * Four additional macros are used to make this happen:
185 *
186 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
187 * the build or imported if PNG_USE_DLL is set - compiler
188 * and system specific.
189 *
190 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
191 * 'type', compiler specific.
192 *
193 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
194 * make a symbol exported from the DLL. Not used in the
195 * public header files; see pngpriv.h for how it is used
196 * in the libpng build.
197 *
198 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
199 * from a DLL - used to define PNG_IMPEXP when
200 * PNG_USE_DLL is set.
201 */
202
203 /* System specific discovery.
204 * ==========================
205 * This code is used at build time to find PNG_IMPEXP, the API settings
206 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
207 * import processing is possible. On Windows systems it also sets
208 * compiler-specific macros to the values required to change the calling
209 * conventions of the various functions.
210 */
211 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
212 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
213 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
214 * MinGW on any architecture currently supported by Windows. Also includes
215 * Watcom builds but these need special treatment because they are not
216 * compatible with GCC or Visual C because of different calling conventions.
217 */
218 # if PNG_API_RULE == 2
219 /* If this line results in an error, either because __watcall is not
220 * understood or because of a redefine just below you cannot use *this*
221 * build of the library with the compiler you are using. *This* build was
222 * build using Watcom and applications must also be built using Watcom!
223 */
224 # define PNGCAPI __watcall
225 # endif
226
227 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
228 # define PNGCAPI __cdecl
229 # if PNG_API_RULE == 1
230 /* If this line results in an error __stdcall is not understood and
231 * PNG_API_RULE should not have been set to '1'.
232 */
233 # define PNGAPI __stdcall
234 # endif
235 # else
236 /* An older compiler, or one not detected (erroneously) above,
237 * if necessary override on the command line to get the correct
238 * variants for the compiler.
239 */
240 # ifndef PNGCAPI
241 # define PNGCAPI _cdecl
242 # endif
243 # if PNG_API_RULE == 1 && !defined(PNGAPI)
244 # define PNGAPI _stdcall
245 # endif
246 # endif /* compiler/api */
247
248 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
249
250 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
251 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
252 # endif
253
254 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
255 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
256 /* older Borland and MSC
257 * compilers used '__export' and required this to be after
258 * the type.
259 */
260 # ifndef PNG_EXPORT_TYPE
261 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
262 # endif
263 # define PNG_DLL_EXPORT __export
264 # else /* newer compiler */
265 # define PNG_DLL_EXPORT __declspec(dllexport)
266 # ifndef PNG_DLL_IMPORT
267 # define PNG_DLL_IMPORT __declspec(dllimport)
268 # endif
269 # endif /* compiler */
270
271 #else /* !Windows */
272 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
273 # define PNGAPI _System
274 # else /* !Windows/x86 && !OS/2 */
275 /* Use the defaults, or define PNG*API on the command line (but
276 * this will have to be done for every compile!)
277 */
278 # endif /* other system, !OS/2 */
279 #endif /* !Windows/x86 */
280
281 /* Now do all the defaulting . */
282 #ifndef PNGCAPI
283 # define PNGCAPI
284 #endif
285 #ifndef PNGCBAPI
286 # define PNGCBAPI PNGCAPI
287 #endif
288 #ifndef PNGAPI
289 # define PNGAPI PNGCAPI
290 #endif
291
292 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
293 * then in an internal header file when building the library, otherwise (when
294 * using the library) it is set here.
295 */
296 #ifndef PNG_IMPEXP
297 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
298 /* This forces use of a DLL, disallowing static linking */
299 # define PNG_IMPEXP PNG_DLL_IMPORT
300 # endif
301
302 # ifndef PNG_IMPEXP
303 # define PNG_IMPEXP
304 # endif
305 #endif
306
307 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
308 * 'attributes' as a storage class - the attributes go at the start of the
309 * function definition, and attributes are always appended regardless of the
310 * compiler. This considerably simplifies these macros but may cause problems
311 * if any compilers both need function attributes and fail to handle them as
312 * a storage class (this is unlikely.)
313 */
314 #ifndef PNG_FUNCTION
315 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
316 #endif
317
318 #ifndef PNG_EXPORT_TYPE
319 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
320 #endif
321
322 /* The ordinal value is only relevant when preprocessing png.h for symbol
323 * table entries, so we discard it here. See the .dfn files in the
324 * scripts directory.
325 */
326
327 #ifndef PNG_EXPORTA
328 # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
329 PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
330 PNG_LINKAGE_API attributes)
331 #endif
332
333 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
334 * so make something non-empty to satisfy the requirement:
335 */
336 #define PNG_EMPTY /*empty list*/
337
338 #define PNG_EXPORT(ordinal, type, name, args) \
339 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
340
341 /* Use PNG_REMOVED to comment out a removed interface. */
342 #ifndef PNG_REMOVED
343 # define PNG_REMOVED(ordinal, type, name, args, attributes)
344 #endif
345
346 #ifndef PNG_CALLBACK
347 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
348 #endif
349
350 /* Support for compiler specific function attributes. These are used
351 * so that where compiler support is available incorrect use of API
352 * functions in png.h will generate compiler warnings.
353 *
354 * Added at libpng-1.2.41.
355 */
356
357 #ifndef PNG_NO_PEDANTIC_WARNINGS
358 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
359 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
360 # endif
361 #endif
362
363 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
364 /* Support for compiler specific function attributes. These are used
365 * so that where compiler support is available, incorrect use of API
366 * functions in png.h will generate compiler warnings. Added at libpng
367 * version 1.2.41. Disabling these removes the warnings but may also produce
368 * less efficient code.
369 */
370 # if defined(__clang__) && defined(__has_attribute)
371 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
372 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
373 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
374 # endif
375 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
376 # define PNG_NORETURN __attribute__((__noreturn__))
377 # endif
378 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
379 # define PNG_ALLOCATED __attribute__((__malloc__))
380 # endif
381 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
382 # define PNG_DEPRECATED __attribute__((__deprecated__))
383 # endif
384 # if !defined(PNG_PRIVATE)
385 # ifdef __has_extension
386 # if __has_extension(attribute_unavailable_with_message)
387 # define PNG_PRIVATE __attribute__((__unavailable__(\
388 "This function is not exported by libpng.")))
389 # endif
390 # endif
391 # endif
392 # ifndef PNG_RESTRICT
393 # define PNG_RESTRICT __restrict
394 # endif
395
396 # elif defined(__GNUC__)
397 # ifndef PNG_USE_RESULT
398 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
399 # endif
400 # ifndef PNG_NORETURN
401 # define PNG_NORETURN __attribute__((__noreturn__))
402 # endif
403 # if __GNUC__ >= 3
404 # ifndef PNG_ALLOCATED
405 # define PNG_ALLOCATED __attribute__((__malloc__))
406 # endif
407 # ifndef PNG_DEPRECATED
408 # define PNG_DEPRECATED __attribute__((__deprecated__))
409 # endif
410 # ifndef PNG_PRIVATE
411 # if 0 /* Doesn't work so we use deprecated instead*/
412 # define PNG_PRIVATE \
413 __attribute__((warning("This function is not exported by libpng.")))
414 # else
415 # define PNG_PRIVATE \
416 __attribute__((__deprecated__))
417 # endif
418 # endif
419 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
420 # ifndef PNG_RESTRICT
421 # define PNG_RESTRICT __restrict
422 # endif
423 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
424 # endif /* __GNUC__ >= 3 */
425
426 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
427 # ifndef PNG_USE_RESULT
428 # define PNG_USE_RESULT /* not supported */
429 # endif
430 # ifndef PNG_NORETURN
431 # define PNG_NORETURN __declspec(noreturn)
432 # endif
433 # ifndef PNG_ALLOCATED
434 # if (_MSC_VER >= 1400)
435 # define PNG_ALLOCATED __declspec(restrict)
436 # endif
437 # endif
438 # ifndef PNG_DEPRECATED
439 # define PNG_DEPRECATED __declspec(deprecated)
440 # endif
441 # ifndef PNG_PRIVATE
442 # define PNG_PRIVATE __declspec(deprecated)
443 # endif
444 # ifndef PNG_RESTRICT
445 # if (_MSC_VER >= 1400)
446 # define PNG_RESTRICT __restrict
447 # endif
448 # endif
449
450 # elif defined(__WATCOMC__)
451 # ifndef PNG_RESTRICT
452 # define PNG_RESTRICT __restrict
453 # endif
454 # endif
455 #endif /* PNG_PEDANTIC_WARNINGS */
456
457 #ifndef PNG_DEPRECATED
458 # define PNG_DEPRECATED /* Use of this function is deprecated */
459 #endif
460 #ifndef PNG_USE_RESULT
461 # define PNG_USE_RESULT /* The result of this function must be checked */
462 #endif
463 #ifndef PNG_NORETURN
464 # define PNG_NORETURN /* This function does not return */
465 #endif
466 #ifndef PNG_ALLOCATED
467 # define PNG_ALLOCATED /* The result of the function is new memory */
468 #endif
469 #ifndef PNG_PRIVATE
470 # define PNG_PRIVATE /* This is a private libpng function */
471 #endif
472 #ifndef PNG_RESTRICT
473 # define PNG_RESTRICT /* The C99 "restrict" feature */
474 #endif
475
476 #ifndef PNG_FP_EXPORT /* A floating point API. */
477 # ifdef PNG_FLOATING_POINT_SUPPORTED
478 # define PNG_FP_EXPORT(ordinal, type, name, args)\
479 PNG_EXPORT(ordinal, type, name, args);
480 # else /* No floating point APIs */
481 # define PNG_FP_EXPORT(ordinal, type, name, args)
482 # endif
483 #endif
484 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
485 # ifdef PNG_FIXED_POINT_SUPPORTED
486 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
487 PNG_EXPORT(ordinal, type, name, args);
488 # else /* No fixed point APIs */
489 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
490 # endif
491 #endif
492
493 #ifndef PNG_BUILDING_SYMBOL_TABLE
494 /* Some typedefs to get us started. These should be safe on most of the common
495 * platforms.
496 *
497 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
498 * 32-bit value however this is not normally advisable.
499 *
500 * png_uint_16 and png_int_16 should always be two bytes in size - this is
501 * verified at library build time.
502 *
503 * png_byte must always be one byte in size.
504 *
505 * The checks below use constants from limits.h, as defined by the ISOC90
506 * standard.
507 */
508 #if CHAR_BIT == 8 && UCHAR_MAX == 255
509 typedef unsigned char png_byte;
510 #else
511 # error "libpng requires 8-bit bytes"
512 #endif
513
514 #if INT_MIN == -32768 && INT_MAX == 32767
515 typedef int png_int_16;
516 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
517 typedef short png_int_16;
518 #else
519 # error "libpng requires a signed 16-bit type"
520 #endif
521
522 #if UINT_MAX == 65535
523 typedef unsigned int png_uint_16;
524 #elif USHRT_MAX == 65535
525 typedef unsigned short png_uint_16;
526 #else
527 # error "libpng requires an unsigned 16-bit type"
528 #endif
529
530 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
531 typedef int png_int_32;
532 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
533 typedef long int png_int_32;
534 #else
535 # error "libpng requires a signed 32-bit (or more) type"
536 #endif
537
538 #if UINT_MAX > 4294967294
539 typedef unsigned int png_uint_32;
540 #elif ULONG_MAX > 4294967294
541 typedef unsigned long int png_uint_32;
542 #else
543 # error "libpng requires an unsigned 32-bit (or more) type"
544 #endif
545
546 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
547 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
548 */
549 typedef size_t png_size_t;
550 typedef ptrdiff_t png_ptrdiff_t;
551
552 /* libpng needs to know the maximum value of 'size_t' and this controls the
553 * definition of png_alloc_size_t, below. This maximum value of size_t limits
554 * but does not control the maximum allocations the library makes - there is
555 * direct application control of this through png_set_user_limits().
556 */
557 #ifndef PNG_SMALL_SIZE_T
558 /* Compiler specific tests for systems where size_t is known to be less than
559 * 32 bits (some of these systems may no longer work because of the lack of
560 * 'far' support; see above.)
561 */
562 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
563 (defined(_MSC_VER) && defined(MAXSEG_64K))
564 # define PNG_SMALL_SIZE_T
565 # endif
566 #endif
567
568 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
569 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to
570 * png_alloc_size_t are not necessary; in fact, it is recommended not to use
571 * them at all so that the compiler can complain when something turns out to be
572 * problematic.
573 *
574 * Casts in the other direction (from png_alloc_size_t to png_size_t or
575 * png_uint_32) should be explicitly applied; however, we do not expect to
576 * encounter practical situations that require such conversions.
577 *
578 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
579 * 4294967295 - i.e. less than the maximum value of png_uint_32.
580 */
581 #ifdef PNG_SMALL_SIZE_T
582 typedef png_uint_32 png_alloc_size_t;
583 #else
584 typedef png_size_t png_alloc_size_t;
585 #endif
586
587 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
588 * implementations of Intel CPU specific support of user-mode segmented address
589 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
590 * separate 'segment' registers. The implementation requires two different
591 * types of pointer (only one of which includes the segment value.)
592 *
593 * If required this support is available in version 1.2 of libpng and may be
594 * available in versions through 1.5, although the correctness of the code has
595 * not been verified recently.
596 */
597
598 /* Typedef for floating-point numbers that are converted to fixed-point with a
599 * multiple of 100,000, e.g., gamma
600 */
601 typedef png_int_32 png_fixed_point;
602
603 /* Add typedefs for pointers */
604 typedef void * png_voidp;
605 typedef const void * png_const_voidp;
606 typedef png_byte * png_bytep;
607 typedef const png_byte * png_const_bytep;
608 typedef png_uint_32 * png_uint_32p;
609 typedef const png_uint_32 * png_const_uint_32p;
610 typedef png_int_32 * png_int_32p;
611 typedef const png_int_32 * png_const_int_32p;
612 typedef png_uint_16 * png_uint_16p;
613 typedef const png_uint_16 * png_const_uint_16p;
614 typedef png_int_16 * png_int_16p;
615 typedef const png_int_16 * png_const_int_16p;
616 typedef char * png_charp;
617 typedef const char * png_const_charp;
618 typedef png_fixed_point * png_fixed_point_p;
619 typedef const png_fixed_point * png_const_fixed_point_p;
620 typedef png_size_t * png_size_tp;
621 typedef const png_size_t * png_const_size_tp;
622
623 #ifdef PNG_STDIO_SUPPORTED
624 typedef FILE * png_FILE_p;
625 #endif
626
627 #ifdef PNG_FLOATING_POINT_SUPPORTED
628 typedef double * png_doublep;
629 typedef const double * png_const_doublep;
630 #endif
631
632 /* Pointers to pointers; i.e. arrays */
633 typedef png_byte * * png_bytepp;
634 typedef png_uint_32 * * png_uint_32pp;
635 typedef png_int_32 * * png_int_32pp;
636 typedef png_uint_16 * * png_uint_16pp;
637 typedef png_int_16 * * png_int_16pp;
638 typedef const char * * png_const_charpp;
639 typedef char * * png_charpp;
640 typedef png_fixed_point * * png_fixed_point_pp;
641 #ifdef PNG_FLOATING_POINT_SUPPORTED
642 typedef double * * png_doublepp;
643 #endif
644
645 /* Pointers to pointers to pointers; i.e., pointer to array */
646 typedef char * * * png_charppp;
647
648 #endif /* PNG_BUILDING_SYMBOL_TABLE */
649
650 #endif /* PNGCONF_H */