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Issue 2021403002: Update libpng to 1.6.22 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rearrange pnglibconf.h Created 4 years, 6 months ago
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1 1
2 /* pngconf.h - machine configurable file for libpng 2 /* pngconf.h - machine configurable file for libpng
3 * 3 *
4 * libpng version 1.2.56, December 17, 2015 4 * libpng version 1.6.22, May 26, 2016
5 * 5 *
6 * Copyright (c) 1998-2015 Glenn Randers-Pehrson 6 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 * 9 *
10 * This code is released under the libpng license. 10 * This code is released under the libpng license.
11 * For conditions of distribution and use, see the disclaimer 11 * For conditions of distribution and use, see the disclaimer
12 * and license in png.h 12 * and license in png.h
13 * 13 *
14 * Any machine specific code is near the front of this file, so if you 14 * Any machine specific code is near the front of this file, so if you
15 * are configuring libpng for a machine, you may want to read the section 15 * are configuring libpng for a machine, you may want to read the section
16 * starting here down to where it starts to typedef png_color, png_text, 16 * starting here down to where it starts to typedef png_color, png_text,
17 * and png_info. 17 * and png_info.
18 */ 18 */
19 19
20 #ifndef PNGCONF_H 20 #ifndef PNGCONF_H
21 #define PNGCONF_H 21 #define PNGCONF_H
22 22
23 #define PNG_1_2_X 23 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
24 24
25 /* 25 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
26 * PNG_USER_CONFIG has to be defined on the compiler command line. This 26 * compiler for correct compilation. The following header files are required by
27 * includes the resource compiler for Windows DLL configurations. 27 * the standard. If your compiler doesn't provide these header files, or they
28 */ 28 * do not match the standard, you will need to provide/improve them.
29 #ifdef PNG_USER_CONFIG 29 */
30 # ifndef PNG_USER_PRIVATEBUILD 30 #include <limits.h>
31 # define PNG_USER_PRIVATEBUILD 31 #include <stddef.h>
32 # endif 32
33 #include "pngusr.h" 33 /* Library header files. These header files are all defined by ISOC90; libpng
34 #endif 34 * expects conformant implementations, however, an ISOC90 conformant system need
35 35 * not provide these header files if the functionality cannot be implemented.
36 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */ 36 * In this case it will be necessary to disable the relevant parts of libpng in
37 #ifdef PNG_CONFIGURE_LIBPNG 37 * the build of pnglibconf.h.
38 #ifdef HAVE_CONFIG_H 38 *
39 #include "config.h" 39 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
40 #endif 40 * include this unnecessary header file.
41 #endif 41 */
42 42
43 /* 43 #ifdef PNG_STDIO_SUPPORTED
44 * Added at libpng-1.2.8 44 /* Required for the definition of FILE: */
45 * 45 # include <stdio.h>
46 * If you create a private DLL you need to define in "pngusr.h" the followings: 46 #endif
47 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of 47
48 * the DLL was built> 48 #ifdef PNG_SETJMP_SUPPORTED
49 * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons." 49 /* Required for the definition of jmp_buf and the declaration of longjmp: */
50 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to 50 # include <setjmp.h>
51 * distinguish your DLL from those of the official release. These 51 #endif
52 * correspond to the trailing letters that come after the version 52
53 * number and must match your private DLL name> 53 #ifdef PNG_CONVERT_tIME_SUPPORTED
54 * e.g. // private DLL "libpng13gx.dll" 54 /* Required for struct tm: */
55 * #define PNG_USER_DLLFNAME_POSTFIX "gx" 55 # include <time.h>
56 * 56 #endif
57 * The following macros are also at your disposal if you want to complete the 57
58 * DLL VERSIONINFO structure. 58 #endif /* PNG_BUILDING_SYMBOL_TABLE */
59 * - PNG_USER_VERSIONINFO_COMMENTS 59
60 * - PNG_USER_VERSIONINFO_COMPANYNAME 60 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
61 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS 61 * PNG_NO_CONST; this is no longer supported except for data declarations which
62 */ 62 * apparently still cause problems in 2011 on some compilers.
63 63 */
64 #ifdef __STDC__ 64 #define PNG_CONST const /* backward compatibility only */
65 #ifdef SPECIALBUILD 65
66 # pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\ 66 /* This controls optimization of the reading of 16-bit and 32-bit values
67 are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.") 67 * from PNG files. It can be set on a per-app-file basis - it
68 #endif 68 * just changes whether a macro is used when the function is called.
69 69 * The library builder sets the default; if read functions are not
70 #ifdef PRIVATEBUILD 70 * built into the library the macro implementation is forced on.
71 # pragma message("PRIVATEBUILD is deprecated.\ 71 */
72 Use PNG_USER_PRIVATEBUILD instead.") 72 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
73 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD 73 # define PNG_USE_READ_MACROS
74 #endif 74 #endif
75 #endif /* __STDC__ */ 75 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
76 76 # if PNG_DEFAULT_READ_MACROS
77 #ifndef PNG_VERSION_INFO_ONLY 77 # define PNG_USE_READ_MACROS
78 78 # endif
79 /* End of material added to libpng-1.2.8 */ 79 #endif
80 80
81 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble 81 /* COMPILER SPECIFIC OPTIONS.
82 Restored at libpng-1.2.21 */ 82 *
83 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \ 83 * These options are provided so that a variety of difficult compilers
84 !defined(PNG_WARN_UNINITIALIZED_ROW) 84 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
85 # define PNG_WARN_UNINITIALIZED_ROW 1 85 * below) but still have compiler specific implementations, others
86 #endif 86 * may be changed on a per-file basis when compiling against libpng.
87 /* End of material added at libpng-1.2.19/1.2.21 */ 87 */
88 88
89 /* Added at libpng-1.2.51 (ported from 1.4.6) */ 89 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
90 #ifndef PNG_UNUSED 90 * against legacy (pre ISOC90) compilers that did not understand function
91 /* Unused formal parameter warnings are silenced using the following macro 91 * prototypes. It is not required for modern C compilers.
92 * which is expected to have no bad effects on performance (optimizing 92 */
93 * compilers will probably remove it entirely). Note that if you replace 93 #ifndef PNGARG
94 * it with something other than whitespace, you must include the terminating 94 # define PNGARG(arglist) arglist
95 * semicolon. 95 #endif
96 */ 96
97 # define PNG_UNUSED(param) (void)param; 97 /* Function calling conventions.
98 #endif 98 * =============================
99 /* End of material added to libpng-1.4.6 */ 99 * Normally it is not necessary to specify to the compiler how to call
100 100 * a function - it just does it - however on x86 systems derived from
101 /* This is the size of the compression buffer, and thus the size of 101 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
102 * an IDAT chunk. Make this whatever size you feel is best for your 102 * and some others) there are multiple ways to call a function and the
103 * machine. One of these will be allocated per png_struct. When this 103 * default can be changed on the compiler command line. For this reason
104 * is full, it writes the data to the disk, and does some other 104 * libpng specifies the calling convention of every exported function and
105 * calculations. Making this an extremely small size will slow 105 * every function called via a user supplied function pointer. This is
106 * the library down, but you may want to experiment to determine 106 * done in this file by defining the following macros:
107 * where it becomes significant, if you are concerned with memory 107 *
108 * usage. Note that zlib allocates at least 32Kb also. For readers, 108 * PNGAPI Calling convention for exported functions.
109 * this describes the size of the buffer available to read the data in. 109 * PNGCBAPI Calling convention for user provided (callback) functions.
110 * Unless this gets smaller than the size of a row (compressed), 110 * PNGCAPI Calling convention used by the ANSI-C library (required
111 * it should not make much difference how big this is. 111 * for longjmp callbacks and sometimes used internally to
112 */ 112 * specify the calling convention for zlib).
113 113 *
114 #ifndef PNG_ZBUF_SIZE 114 * These macros should never be overridden. If it is necessary to
115 # define PNG_ZBUF_SIZE 8192 115 * change calling convention in a private build this can be done
116 #endif 116 * by setting PNG_API_RULE (which defaults to 0) to one of the values
117 117 * below to select the correct 'API' variants.
118 /* Enable if you want a write-only libpng */ 118 *
119 119 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
120 #ifndef PNG_NO_READ_SUPPORTED 120 * This is correct in every known environment.
121 # define PNG_READ_SUPPORTED 121 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
122 #endif 122 * the 'C' calling convention (from PNGCAPI) for
123 123 * callbacks (PNGCBAPI). This is no longer required
124 /* Enable if you want a read-only libpng */ 124 * in any known environment - if it has to be used
125 125 * please post an explanation of the problem to the
126 #ifndef PNG_NO_WRITE_SUPPORTED 126 * libpng mailing list.
127 # define PNG_WRITE_SUPPORTED 127 *
128 #endif 128 * These cases only differ if the operating system does not use the C
129 129 * calling convention, at present this just means the above cases
130 /* Enabled in 1.2.41. */ 130 * (x86 DOS/Windows sytems) and, even then, this does not apply to
131 #ifdef PNG_ALLOW_BENIGN_ERRORS 131 * Cygwin running on those systems.
132 # define png_benign_error png_warning 132 *
133 # define png_chunk_benign_error png_chunk_warning 133 * Note that the value must be defined in pnglibconf.h so that what
134 #else 134 * the application uses to call the library matches the conventions
135 # ifndef PNG_BENIGN_ERRORS_SUPPORTED 135 * set when building the library.
136 # define png_benign_error png_error 136 */
137 # define png_chunk_benign_error png_chunk_error 137
138 # endif 138 /* Symbol export
139 #endif 139 * =============
140 140 * When building a shared library it is almost always necessary to tell
141 /* Added in libpng-1.2.41 */ 141 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
142 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED) 142 * is used to mark the symbols. On some systems these symbols can be
143 # define PNG_WARNINGS_SUPPORTED 143 * extracted at link time and need no special processing by the compiler,
144 #endif 144 * on other systems the symbols are flagged by the compiler and just
145 145 * the declaration requires a special tag applied (unfortunately) in a
146 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED) 146 * compiler dependent way. Some systems can do either.
147 # define PNG_ERROR_TEXT_SUPPORTED 147 *
148 #endif 148 * A small number of older systems also require a symbol from a DLL to
149 149 * be flagged to the program that calls it. This is a problem because
150 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED) 150 * we do not know in the header file included by application code that
151 # define PNG_CHECK_cHRM_SUPPORTED 151 * the symbol will come from a shared library, as opposed to a statically
152 #endif 152 * linked one. For this reason the application must tell us by setting
153 153 * the magic flag PNG_USE_DLL to turn on the special processing before
154 /* Enabled by default in 1.2.0. You can disable this if you don't need to 154 * it includes png.h.
155 * support PNGs that are embedded in MNG datastreams 155 *
156 */ 156 * Four additional macros are used to make this happen:
157 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES) 157 *
158 # ifndef PNG_MNG_FEATURES_SUPPORTED 158 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
159 # define PNG_MNG_FEATURES_SUPPORTED 159 * the build or imported if PNG_USE_DLL is set - compiler
160 # endif 160 * and system specific.
161 #endif 161 *
162 162 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
163 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED 163 * 'type', compiler specific.
164 # ifndef PNG_FLOATING_POINT_SUPPORTED 164 *
165 # define PNG_FLOATING_POINT_SUPPORTED 165 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
166 # endif 166 * make a symbol exported from the DLL. Not used in the
167 #endif 167 * public header files; see pngpriv.h for how it is used
168 168 * in the libpng build.
169 /* If you are running on a machine where you cannot allocate more 169 *
170 * than 64K of memory at once, uncomment this. While libpng will not 170 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
171 * normally need that much memory in a chunk (unless you load up a very 171 * from a DLL - used to define PNG_IMPEXP when
172 * large file), zlib needs to know how big of a chunk it can use, and 172 * PNG_USE_DLL is set.
173 * libpng thus makes sure to check any memory allocation to verify it 173 */
174 * will fit into memory. 174
175 #define PNG_MAX_MALLOC_64K 175 /* System specific discovery.
176 */ 176 * ==========================
177 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) 177 * This code is used at build time to find PNG_IMPEXP, the API settings
178 # define PNG_MAX_MALLOC_64K 178 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
179 #endif 179 * import processing is possible. On Windows systems it also sets
180 180 * compiler-specific macros to the values required to change the calling
181 /* Special munging to support doing things the 'cygwin' way: 181 * conventions of the various functions.
182 * 'Normal' png-on-win32 defines/defaults: 182 */
183 * PNG_BUILD_DLL -- building dll 183 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
184 * PNG_USE_DLL -- building an application, linking to dll 184 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
185 * (no define) -- building static library, or building an 185 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
186 * application and linking to the static lib 186 * MinGW on any architecture currently supported by Windows. Also includes
187 * 'Cygwin' defines/defaults: 187 * Watcom builds but these need special treatment because they are not
188 * PNG_BUILD_DLL -- (ignored) building the dll 188 * compatible with GCC or Visual C because of different calling conventions.
189 * (no define) -- (ignored) building an application, linking to the dll 189 */
190 * PNG_STATIC -- (ignored) building the static lib, or building an 190 # if PNG_API_RULE == 2
191 * application that links to the static lib. 191 /* If this line results in an error, either because __watcall is not
192 * ALL_STATIC -- (ignored) building various static libs, or building an 192 * understood or because of a redefine just below you cannot use *this*
193 * application that links to the static libs. 193 * build of the library with the compiler you are using. *This* build was
194 * Thus, 194 * build using Watcom and applications must also be built using Watcom!
195 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and 195 */
196 * this bit of #ifdefs will define the 'correct' config variables based on 196 # define PNGCAPI __watcall
197 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but 197 # endif
198 * unnecessary. 198
199 * 199 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
200 * Also, the precedence order is: 200 # define PNGCAPI __cdecl
201 * ALL_STATIC (since we can't #undef something outside our namespace) 201 # if PNG_API_RULE == 1
202 * PNG_BUILD_DLL 202 /* If this line results in an error __stdcall is not understood and
203 * PNG_STATIC 203 * PNG_API_RULE should not have been set to '1'.
204 * (nothing) == PNG_USE_DLL 204 */
205 * 205 # define PNGAPI __stdcall
206 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
207 * of auto-import in binutils, we no longer need to worry about
208 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
209 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
210 * to __declspec() stuff. However, we DO need to worry about
211 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
212 * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
213 */
214 #ifdef __CYGWIN__
215 # ifdef ALL_STATIC
216 # ifdef PNG_BUILD_DLL
217 # undef PNG_BUILD_DLL
218 # endif
219 # ifdef PNG_USE_DLL
220 # undef PNG_USE_DLL
221 # endif
222 # ifdef PNG_DLL
223 # undef PNG_DLL
224 # endif
225 # ifndef PNG_STATIC
226 # define PNG_STATIC
227 # endif 206 # endif
228 # else 207 # else
229 # ifdef PNG_BUILD_DLL 208 /* An older compiler, or one not detected (erroneously) above,
230 # ifdef PNG_STATIC 209 * if necessary override on the command line to get the correct
231 # undef PNG_STATIC 210 * variants for the compiler.
232 # endif 211 */
233 # ifdef PNG_USE_DLL 212 # ifndef PNGCAPI
234 # undef PNG_USE_DLL 213 # define PNGCAPI _cdecl
235 # endif 214 # endif
236 # ifndef PNG_DLL 215 # if PNG_API_RULE == 1 && !defined(PNGAPI)
237 # define PNG_DLL 216 # define PNGAPI _stdcall
238 # endif 217 # endif
239 # else 218 # endif /* compiler/api */
240 # ifdef PNG_STATIC 219
241 # ifdef PNG_USE_DLL 220 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
242 # undef PNG_USE_DLL 221
243 # endif 222 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
244 # ifdef PNG_DLL 223 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
245 # undef PNG_DLL 224 # endif
246 # endif 225
247 # else 226 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
248 # ifndef PNG_USE_DLL 227 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
249 # define PNG_USE_DLL 228 /* older Borland and MSC
250 # endif 229 * compilers used '__export' and required this to be after
251 # ifndef PNG_DLL 230 * the type.
252 # define PNG_DLL 231 */
253 # endif 232 # ifndef PNG_EXPORT_TYPE
254 # endif 233 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
255 # endif 234 # endif
256 # endif 235 # define PNG_DLL_EXPORT __export
257 #endif 236 # else /* newer compiler */
258 237 # define PNG_DLL_EXPORT __declspec(dllexport)
259 /* This protects us against compilers that run on a windowing system 238 # ifndef PNG_DLL_IMPORT
260 * and thus don't have or would rather us not use the stdio types: 239 # define PNG_DLL_IMPORT __declspec(dllimport)
261 * stdin, stdout, and stderr. The only one currently used is stderr 240 # endif
262 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will 241 # endif /* compiler */
263 * prevent these from being compiled and used. #defining PNG_NO_STDIO 242
264 * will also prevent these, plus will prevent the entire set of stdio 243 #else /* !Windows */
265 * macros and functions (FILE *, printf, etc.) from being compiled and used, 244 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
266 * unless (PNG_DEBUG > 0) has been #defined. 245 # define PNGAPI _System
267 * 246 # else /* !Windows/x86 && !OS/2 */
268 * #define PNG_NO_CONSOLE_IO 247 /* Use the defaults, or define PNG*API on the command line (but
269 * #define PNG_NO_STDIO 248 * this will have to be done for every compile!)
270 */ 249 */
271 250 # endif /* other system, !OS/2 */
272 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED) 251 #endif /* !Windows/x86 */
273 # define PNG_STDIO_SUPPORTED 252
274 #endif 253 /* Now do all the defaulting . */
275 254 #ifndef PNGCAPI
276 #ifdef _WIN32_WCE 255 # define PNGCAPI
277 # include <windows.h> 256 #endif
278 /* Console I/O functions are not supported on WindowsCE */ 257 #ifndef PNGCBAPI
279 # define PNG_NO_CONSOLE_IO 258 # define PNGCBAPI PNGCAPI
280 /* abort() may not be supported on some/all Windows CE platforms */ 259 #endif
281 # define PNG_ABORT() exit(-1) 260 #ifndef PNGAPI
282 # ifdef PNG_DEBUG 261 # define PNGAPI PNGCAPI
283 # undef PNG_DEBUG 262 #endif
284 # endif 263
285 #endif 264 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
286 265 * then in an internal header file when building the library, otherwise (when
287 #ifdef PNG_BUILD_DLL 266 * using the library) it is set here.
288 # ifndef PNG_CONSOLE_IO_SUPPORTED 267 */
289 # ifndef PNG_NO_CONSOLE_IO 268 #ifndef PNG_IMPEXP
290 # define PNG_NO_CONSOLE_IO 269 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
291 # endif 270 /* This forces use of a DLL, disallowing static linking */
292 # endif 271 # define PNG_IMPEXP PNG_DLL_IMPORT
293 #endif
294
295 # ifdef PNG_NO_STDIO
296 # ifndef PNG_NO_CONSOLE_IO
297 # define PNG_NO_CONSOLE_IO
298 # endif
299 # ifdef PNG_DEBUG
300 # if (PNG_DEBUG > 0)
301 # include <stdio.h>
302 # endif
303 # endif
304 # else
305 # ifndef _WIN32_WCE
306 /* "stdio.h" functions are not supported on WindowsCE */
307 # include <stdio.h>
308 # endif
309 # endif
310
311 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
312 # define PNG_CONSOLE_IO_SUPPORTED
313 #endif
314
315 /* This macro protects us against machines that don't have function
316 * prototypes (ie K&R style headers). If your compiler does not handle
317 * function prototypes, define this macro and use the included ansi2knr.
318 * I've always been able to use _NO_PROTO as the indicator, but you may
319 * need to drag the empty declaration out in front of here, or change the
320 * ifdef to suit your own needs.
321 */
322 #ifndef PNGARG
323
324 #ifdef OF /* zlib prototype munger */
325 # define PNGARG(arglist) OF(arglist)
326 #else
327
328 #ifdef _NO_PROTO
329 # define PNGARG(arglist) ()
330 # ifndef PNG_TYPECAST_NULL
331 # define PNG_TYPECAST_NULL
332 # endif
333 #else
334 # define PNGARG(arglist) arglist
335 #endif /* _NO_PROTO */
336
337
338 #endif /* OF */
339
340 #endif /* PNGARG */
341
342 /* Try to determine if we are compiling on a Mac. Note that testing for
343 * just __MWERKS__ is not good enough, because the Codewarrior is now used
344 * on non-Mac platforms.
345 */
346 #ifndef MACOS
347 # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
348 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
349 # define MACOS
350 # endif
351 #endif
352
353 /* enough people need this for various reasons to include it here */
354 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
355 # include <sys/types.h>
356 #endif
357
358 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
359 # define PNG_SETJMP_SUPPORTED
360 #endif
361
362 #ifdef PNG_SETJMP_SUPPORTED
363 /* This is an attempt to force a single setjmp behaviour on Linux. If
364 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
365 *
366 * You can bypass this test if you know that your application uses exactly
367 * the same setjmp.h that was included when libpng was built. Only define
368 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
369 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
370 * while building a separate libpng library for general use.
371 */
372
373 # ifndef PNG_SKIP_SETJMP_CHECK
374 # ifdef __linux__
375 # ifdef _BSD_SOURCE
376 # define PNG_SAVE_BSD_SOURCE
377 # undef _BSD_SOURCE
378 # endif
379 # ifdef _SETJMP_H
380 /* If you encounter a compiler error here, see the explanation
381 * near the end of INSTALL.
382 */
383 __pngconf.h__ in libpng already includes setjmp.h;
384 __dont__ include it again.;
385 # endif
386 # endif /* __linux__ */
387 # endif /* PNG_SKIP_SETJMP_CHECK */
388
389 /* include setjmp.h for error handling */
390 # include <setjmp.h>
391
392 # ifdef __linux__
393 # ifdef PNG_SAVE_BSD_SOURCE
394 # ifndef _BSD_SOURCE
395 # define _BSD_SOURCE
396 # endif
397 # undef PNG_SAVE_BSD_SOURCE
398 # endif
399 # endif /* __linux__ */
400 #endif /* PNG_SETJMP_SUPPORTED */
401
402 #ifdef BSD
403 # include <strings.h>
404 #else
405 # include <string.h>
406 #endif
407
408 /* Other defines for things like memory and the like can go here. */
409 #ifdef PNG_INTERNAL
410
411 #include <stdlib.h>
412
413 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
414 * aren't usually used outside the library (as far as I know), so it is
415 * debatable if they should be exported at all. In the future, when it is
416 * possible to have run-time registry of chunk-handling functions, some of
417 * these will be made available again.
418 #define PNG_EXTERN extern
419 */
420 #define PNG_EXTERN
421
422 /* Other defines specific to compilers can go here. Try to keep
423 * them inside an appropriate ifdef/endif pair for portability.
424 */
425
426 #ifdef PNG_FLOATING_POINT_SUPPORTED
427 # ifdef MACOS
428 /* We need to check that <math.h> hasn't already been included earlier
429 * as it seems it doesn't agree with <fp.h>, yet we should really use
430 * <fp.h> if possible.
431 */
432 # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
433 # include <fp.h>
434 # endif
435 # else
436 # include <math.h>
437 # endif
438 # if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
439 /* Amiga SAS/C: We must include builtin FPU functions when compiling using
440 * MATH=68881
441 */
442 # include <m68881.h>
443 # endif
444 #endif
445
446 /* Codewarrior on NT has linking problems without this. */
447 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
448 # define PNG_ALWAYS_EXTERN
449 #endif
450
451 /* This provides the non-ANSI (far) memory allocation routines. */
452 #if defined(__TURBOC__) && defined(__MSDOS__)
453 # include <mem.h>
454 # include <alloc.h>
455 #endif
456
457 /* I have no idea why is this necessary... */
458 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
459 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
460 # include <malloc.h>
461 #endif
462
463 /* This controls how fine the dithering gets. As this allocates
464 * a largish chunk of memory (32K), those who are not as concerned
465 * with dithering quality can decrease some or all of these.
466 */
467 #ifndef PNG_DITHER_RED_BITS
468 # define PNG_DITHER_RED_BITS 5
469 #endif
470 #ifndef PNG_DITHER_GREEN_BITS
471 # define PNG_DITHER_GREEN_BITS 5
472 #endif
473 #ifndef PNG_DITHER_BLUE_BITS
474 # define PNG_DITHER_BLUE_BITS 5
475 #endif
476
477 /* This controls how fine the gamma correction becomes when you
478 * are only interested in 8 bits anyway. Increasing this value
479 * results in more memory being used, and more pow() functions
480 * being called to fill in the gamma tables. Don't set this value
481 * less then 8, and even that may not work (I haven't tested it).
482 */
483
484 #ifndef PNG_MAX_GAMMA_8
485 # define PNG_MAX_GAMMA_8 11
486 #endif
487
488 /* This controls how much a difference in gamma we can tolerate before
489 * we actually start doing gamma conversion.
490 */
491 #ifndef PNG_GAMMA_THRESHOLD
492 # define PNG_GAMMA_THRESHOLD 0.05
493 #endif
494
495 #endif /* PNG_INTERNAL */
496
497 /* The following uses const char * instead of char * for error
498 * and warning message functions, so some compilers won't complain.
499 * If you do not want to use const, define PNG_NO_CONST here.
500 */
501
502 #ifndef PNG_NO_CONST
503 # define PNG_CONST const
504 #else
505 # define PNG_CONST
506 #endif
507
508 /* The following defines give you the ability to remove code from the
509 * library that you will not be using. I wish I could figure out how to
510 * automate this, but I can't do that without making it seriously hard
511 * on the users. So if you are not using an ability, change the #define
512 * to and #undef, and that part of the library will not be compiled. If
513 * your linker can't find a function, you may want to make sure the
514 * ability is defined here. Some of these depend upon some others being
515 * defined. I haven't figured out all the interactions here, so you may
516 * have to experiment awhile to get everything to compile. If you are
517 * creating or using a shared library, you probably shouldn't touch this,
518 * as it will affect the size of the structures, and this will cause bad
519 * things to happen if the library and/or application ever change.
520 */
521
522 /* Any features you will not be using can be undef'ed here */
523
524 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
525 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
526 * on the compile line, then pick and choose which ones to define without
527 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
528 * if you only want to have a png-compliant reader/writer but don't need
529 * any of the extra transformations. This saves about 80 kbytes in a
530 * typical installation of the library. (PNG_NO_* form added in version
531 * 1.0.1c, for consistency)
532 */
533
534 /* The size of the png_text structure changed in libpng-1.0.6 when
535 * iTXt support was added. iTXt support was turned off by default through
536 * libpng-1.2.x, to support old apps that malloc the png_text structure
537 * instead of calling png_set_text() and letting libpng malloc it. It
538 * will be turned on by default in libpng-1.4.0.
539 */
540
541 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
542 # ifndef PNG_NO_iTXt_SUPPORTED
543 # define PNG_NO_iTXt_SUPPORTED
544 # endif
545 # ifndef PNG_NO_READ_iTXt
546 # define PNG_NO_READ_iTXt
547 # endif
548 # ifndef PNG_NO_WRITE_iTXt
549 # define PNG_NO_WRITE_iTXt
550 # endif
551 #endif
552
553 #if !defined(PNG_NO_iTXt_SUPPORTED)
554 # if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
555 # define PNG_READ_iTXt
556 # endif
557 # if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
558 # define PNG_WRITE_iTXt
559 # endif
560 #endif
561
562 /* The following support, added after version 1.0.0, can be turned off here en
563 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
564 * with old applications that require the length of png_struct and png_info
565 * to remain unchanged.
566 */
567
568 #ifdef PNG_LEGACY_SUPPORTED
569 # define PNG_NO_FREE_ME
570 # define PNG_NO_READ_UNKNOWN_CHUNKS
571 # define PNG_NO_WRITE_UNKNOWN_CHUNKS
572 # define PNG_NO_HANDLE_AS_UNKNOWN
573 # define PNG_NO_READ_USER_CHUNKS
574 # define PNG_NO_READ_iCCP
575 # define PNG_NO_WRITE_iCCP
576 # define PNG_NO_READ_iTXt
577 # define PNG_NO_WRITE_iTXt
578 # define PNG_NO_READ_sCAL
579 # define PNG_NO_WRITE_sCAL
580 # define PNG_NO_READ_sPLT
581 # define PNG_NO_WRITE_sPLT
582 # define PNG_NO_INFO_IMAGE
583 # define PNG_NO_READ_RGB_TO_GRAY
584 # define PNG_NO_READ_USER_TRANSFORM
585 # define PNG_NO_WRITE_USER_TRANSFORM
586 # define PNG_NO_USER_MEM
587 # define PNG_NO_READ_EMPTY_PLTE
588 # define PNG_NO_MNG_FEATURES
589 # define PNG_NO_FIXED_POINT_SUPPORTED
590 #endif
591
592 /* Ignore attempt to turn off both floating and fixed point support */
593 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
594 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
595 # define PNG_FIXED_POINT_SUPPORTED
596 #endif
597
598 #ifndef PNG_NO_FREE_ME
599 # define PNG_FREE_ME_SUPPORTED
600 #endif
601
602 #ifdef PNG_READ_SUPPORTED
603
604 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
605 !defined(PNG_NO_READ_TRANSFORMS)
606 # define PNG_READ_TRANSFORMS_SUPPORTED
607 #endif
608
609 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
610 # ifndef PNG_NO_READ_EXPAND
611 # define PNG_READ_EXPAND_SUPPORTED
612 # endif
613 # ifndef PNG_NO_READ_SHIFT
614 # define PNG_READ_SHIFT_SUPPORTED
615 # endif
616 # ifndef PNG_NO_READ_PACK
617 # define PNG_READ_PACK_SUPPORTED
618 # endif
619 # ifndef PNG_NO_READ_BGR
620 # define PNG_READ_BGR_SUPPORTED
621 # endif
622 # ifndef PNG_NO_READ_SWAP
623 # define PNG_READ_SWAP_SUPPORTED
624 # endif
625 # ifndef PNG_NO_READ_PACKSWAP
626 # define PNG_READ_PACKSWAP_SUPPORTED
627 # endif
628 # ifndef PNG_NO_READ_INVERT
629 # define PNG_READ_INVERT_SUPPORTED
630 # endif
631 # ifndef PNG_NO_READ_DITHER
632 # define PNG_READ_DITHER_SUPPORTED
633 # endif
634 # ifndef PNG_NO_READ_BACKGROUND
635 # define PNG_READ_BACKGROUND_SUPPORTED
636 # endif
637 # ifndef PNG_NO_READ_16_TO_8
638 # define PNG_READ_16_TO_8_SUPPORTED
639 # endif
640 # ifndef PNG_NO_READ_FILLER
641 # define PNG_READ_FILLER_SUPPORTED
642 # endif
643 # ifndef PNG_NO_READ_GAMMA
644 # define PNG_READ_GAMMA_SUPPORTED
645 # endif
646 # ifndef PNG_NO_READ_GRAY_TO_RGB
647 # define PNG_READ_GRAY_TO_RGB_SUPPORTED
648 # endif
649 # ifndef PNG_NO_READ_SWAP_ALPHA
650 # define PNG_READ_SWAP_ALPHA_SUPPORTED
651 # endif
652 # ifndef PNG_NO_READ_INVERT_ALPHA
653 # define PNG_READ_INVERT_ALPHA_SUPPORTED
654 # endif
655 # ifndef PNG_NO_READ_STRIP_ALPHA
656 # define PNG_READ_STRIP_ALPHA_SUPPORTED
657 # endif
658 # ifndef PNG_NO_READ_USER_TRANSFORM
659 # define PNG_READ_USER_TRANSFORM_SUPPORTED
660 # endif
661 # ifndef PNG_NO_READ_RGB_TO_GRAY
662 # define PNG_READ_RGB_TO_GRAY_SUPPORTED
663 # endif
664 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
665
666 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
667 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
668 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
669 # define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
670 #endif /* about interlacing capability! You'll */
671 /* still have interlacing unless you change the following define: */
672 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
673
674 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
675 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
676 !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
677 !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
678 # define PNG_SEQUENTIAL_READ_SUPPORTED
679 #endif
680
681 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
682
683 #ifndef PNG_NO_READ_COMPOSITE_NODIV
684 # ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
685 # define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
686 # endif
687 #endif
688
689 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
690 /* Deprecated, will be removed from version 2.0.0.
691 Use PNG_MNG_FEATURES_SUPPORTED instead. */
692 #ifndef PNG_NO_READ_EMPTY_PLTE
693 # define PNG_READ_EMPTY_PLTE_SUPPORTED
694 #endif
695 #endif
696
697 #endif /* PNG_READ_SUPPORTED */
698
699 #ifdef PNG_WRITE_SUPPORTED
700
701 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
702 !defined(PNG_NO_WRITE_TRANSFORMS)
703 # define PNG_WRITE_TRANSFORMS_SUPPORTED
704 #endif
705
706 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
707 # ifndef PNG_NO_WRITE_SHIFT
708 # define PNG_WRITE_SHIFT_SUPPORTED
709 # endif
710 # ifndef PNG_NO_WRITE_PACK
711 # define PNG_WRITE_PACK_SUPPORTED
712 # endif
713 # ifndef PNG_NO_WRITE_BGR
714 # define PNG_WRITE_BGR_SUPPORTED
715 # endif
716 # ifndef PNG_NO_WRITE_SWAP
717 # define PNG_WRITE_SWAP_SUPPORTED
718 # endif
719 # ifndef PNG_NO_WRITE_PACKSWAP
720 # define PNG_WRITE_PACKSWAP_SUPPORTED
721 # endif
722 # ifndef PNG_NO_WRITE_INVERT
723 # define PNG_WRITE_INVERT_SUPPORTED
724 # endif
725 # ifndef PNG_NO_WRITE_FILLER
726 # define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
727 # endif
728 # ifndef PNG_NO_WRITE_SWAP_ALPHA
729 # define PNG_WRITE_SWAP_ALPHA_SUPPORTED
730 # endif
731 #ifndef PNG_1_0_X
732 # ifndef PNG_NO_WRITE_INVERT_ALPHA
733 # define PNG_WRITE_INVERT_ALPHA_SUPPORTED
734 # endif
735 #endif
736 # ifndef PNG_NO_WRITE_USER_TRANSFORM
737 # define PNG_WRITE_USER_TRANSFORM_SUPPORTED
738 # endif
739 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
740
741 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
742 !defined(PNG_WRITE_INTERLACING_SUPPORTED)
743 #define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
744 encoders, but can cause trouble
745 if left undefined */
746 #endif
747
748 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
749 !defined(PNG_WRITE_WEIGHTED_FILTER) && \
750 defined(PNG_FLOATING_POINT_SUPPORTED)
751 # define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
752 #endif
753
754 #ifndef PNG_NO_WRITE_FLUSH
755 # define PNG_WRITE_FLUSH_SUPPORTED
756 #endif
757
758 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
759 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
760 #ifndef PNG_NO_WRITE_EMPTY_PLTE
761 # define PNG_WRITE_EMPTY_PLTE_SUPPORTED
762 #endif
763 #endif
764
765 #endif /* PNG_WRITE_SUPPORTED */
766
767 #ifndef PNG_1_0_X
768 # ifndef PNG_NO_ERROR_NUMBERS
769 # define PNG_ERROR_NUMBERS_SUPPORTED
770 # endif
771 #endif /* PNG_1_0_X */
772
773 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
774 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
775 # ifndef PNG_NO_USER_TRANSFORM_PTR
776 # define PNG_USER_TRANSFORM_PTR_SUPPORTED
777 # endif
778 #endif
779
780 #ifndef PNG_NO_STDIO
781 # define PNG_TIME_RFC1123_SUPPORTED
782 #endif
783
784 /* This adds extra functions in pngget.c for accessing data from the
785 * info pointer (added in version 0.99)
786 * png_get_image_width()
787 * png_get_image_height()
788 * png_get_bit_depth()
789 * png_get_color_type()
790 * png_get_compression_type()
791 * png_get_filter_type()
792 * png_get_interlace_type()
793 * png_get_pixel_aspect_ratio()
794 * png_get_pixels_per_meter()
795 * png_get_x_offset_pixels()
796 * png_get_y_offset_pixels()
797 * png_get_x_offset_microns()
798 * png_get_y_offset_microns()
799 */
800 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
801 # define PNG_EASY_ACCESS_SUPPORTED
802 #endif
803
804 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
805 * and removed from version 1.2.20. The following will be removed
806 * from libpng-1.4.0
807 */
808
809 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
810 # ifndef PNG_OPTIMIZED_CODE_SUPPORTED
811 # define PNG_OPTIMIZED_CODE_SUPPORTED
812 # endif
813 #endif
814
815 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
816 # ifndef PNG_ASSEMBLER_CODE_SUPPORTED
817 # define PNG_ASSEMBLER_CODE_SUPPORTED
818 # endif
819
820 # if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
821 /* work around 64-bit gcc compiler bugs in gcc-3.x */
822 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
823 # define PNG_NO_MMX_CODE
824 # endif
825 # endif
826
827 # ifdef __APPLE__
828 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
829 # define PNG_NO_MMX_CODE
830 # endif
831 # endif
832
833 # if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
834 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
835 # define PNG_NO_MMX_CODE
836 # endif
837 # endif
838
839 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
840 # define PNG_MMX_CODE_SUPPORTED
841 # endif
842
843 #endif
844 /* end of obsolete code to be removed from libpng-1.4.0 */
845
846 /* Added at libpng-1.2.0 */
847 #ifndef PNG_1_0_X
848 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
849 # define PNG_USER_MEM_SUPPORTED
850 #endif
851 #endif /* PNG_1_0_X */
852
853 /* Added at libpng-1.2.6 */
854 #ifndef PNG_1_0_X
855 # ifndef PNG_SET_USER_LIMITS_SUPPORTED
856 # ifndef PNG_NO_SET_USER_LIMITS
857 # define PNG_SET_USER_LIMITS_SUPPORTED
858 # endif
859 # endif
860 #endif /* PNG_1_0_X */
861
862 /* Added at libpng-1.0.53 and 1.2.43 */
863 #ifndef PNG_USER_LIMITS_SUPPORTED
864 # ifndef PNG_NO_USER_LIMITS
865 # define PNG_USER_LIMITS_SUPPORTED
866 # endif
867 #endif
868
869 /* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter
870 * how large, set these limits to 0x7fffffffL
871 */
872 #ifndef PNG_USER_WIDTH_MAX
873 # define PNG_USER_WIDTH_MAX 1000000L
874 #endif
875 #ifndef PNG_USER_HEIGHT_MAX
876 # define PNG_USER_HEIGHT_MAX 1000000L
877 #endif
878
879 /* Added at libpng-1.2.43. To accept all valid PNGs no matter
880 * how large, set these two limits to 0.
881 */
882 #ifndef PNG_USER_CHUNK_CACHE_MAX
883 # define PNG_USER_CHUNK_CACHE_MAX 32765
884 #endif
885
886 /* Added at libpng-1.2.43 */
887 #ifndef PNG_USER_CHUNK_MALLOC_MAX
888 # define PNG_USER_CHUNK_MALLOC_MAX 8000000
889 #endif
890
891 #ifndef PNG_LITERAL_SHARP
892 # define PNG_LITERAL_SHARP 0x23
893 #endif
894 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
895 # define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
896 #endif
897 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
898 # define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
899 #endif
900
901 /* Added at libpng-1.2.34 */
902 #ifndef PNG_STRING_NEWLINE
903 #define PNG_STRING_NEWLINE "\n"
904 #endif
905
906 /* These are currently experimental features, define them if you want */
907
908 /* very little testing */
909 /*
910 #ifdef PNG_READ_SUPPORTED
911 # ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
912 # define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
913 # endif
914 #endif
915 */
916
917 /* This is only for PowerPC big-endian and 680x0 systems */
918 /* some testing */
919 /*
920 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
921 # define PNG_READ_BIG_ENDIAN_SUPPORTED
922 #endif
923 */
924
925 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
926 /*
927 #define PNG_NO_POINTER_INDEXING
928 */
929
930 #if !defined(PNG_NO_POINTER_INDEXING) && \
931 !defined(PNG_POINTER_INDEXING_SUPPORTED)
932 # define PNG_POINTER_INDEXING_SUPPORTED
933 #endif
934
935 /* These functions are turned off by default, as they will be phased out. */
936 /*
937 #define PNG_USELESS_TESTS_SUPPORTED
938 #define PNG_CORRECT_PALETTE_SUPPORTED
939 */
940
941 /* Any chunks you are not interested in, you can undef here. The
942 * ones that allocate memory may be expecially important (hIST,
943 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
944 * a bit smaller.
945 */
946
947 #if defined(PNG_READ_SUPPORTED) && \
948 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
949 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
950 # define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
951 #endif
952
953 #if defined(PNG_WRITE_SUPPORTED) && \
954 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
955 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
956 # define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
957 #endif
958
959 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
960
961 #ifdef PNG_NO_READ_TEXT
962 # define PNG_NO_READ_iTXt
963 # define PNG_NO_READ_tEXt
964 # define PNG_NO_READ_zTXt
965 #endif
966 #ifndef PNG_NO_READ_bKGD
967 # define PNG_READ_bKGD_SUPPORTED
968 # define PNG_bKGD_SUPPORTED
969 #endif
970 #ifndef PNG_NO_READ_cHRM
971 # define PNG_READ_cHRM_SUPPORTED
972 # define PNG_cHRM_SUPPORTED
973 #endif
974 #ifndef PNG_NO_READ_gAMA
975 # define PNG_READ_gAMA_SUPPORTED
976 # define PNG_gAMA_SUPPORTED
977 #endif
978 #ifndef PNG_NO_READ_hIST
979 # define PNG_READ_hIST_SUPPORTED
980 # define PNG_hIST_SUPPORTED
981 #endif
982 #ifndef PNG_NO_READ_iCCP
983 # define PNG_READ_iCCP_SUPPORTED
984 # define PNG_iCCP_SUPPORTED
985 #endif
986 #ifndef PNG_NO_READ_iTXt
987 # ifndef PNG_READ_iTXt_SUPPORTED
988 # define PNG_READ_iTXt_SUPPORTED
989 # endif
990 # ifndef PNG_iTXt_SUPPORTED
991 # define PNG_iTXt_SUPPORTED
992 # endif
993 #endif
994 #ifndef PNG_NO_READ_oFFs
995 # define PNG_READ_oFFs_SUPPORTED
996 # define PNG_oFFs_SUPPORTED
997 #endif
998 #ifndef PNG_NO_READ_pCAL
999 # define PNG_READ_pCAL_SUPPORTED
1000 # define PNG_pCAL_SUPPORTED
1001 #endif
1002 #ifndef PNG_NO_READ_sCAL
1003 # define PNG_READ_sCAL_SUPPORTED
1004 # define PNG_sCAL_SUPPORTED
1005 #endif
1006 #ifndef PNG_NO_READ_pHYs
1007 # define PNG_READ_pHYs_SUPPORTED
1008 # define PNG_pHYs_SUPPORTED
1009 #endif
1010 #ifndef PNG_NO_READ_sBIT
1011 # define PNG_READ_sBIT_SUPPORTED
1012 # define PNG_sBIT_SUPPORTED
1013 #endif
1014 #ifndef PNG_NO_READ_sPLT
1015 # define PNG_READ_sPLT_SUPPORTED
1016 # define PNG_sPLT_SUPPORTED
1017 #endif
1018 #ifndef PNG_NO_READ_sRGB
1019 # define PNG_READ_sRGB_SUPPORTED
1020 # define PNG_sRGB_SUPPORTED
1021 #endif
1022 #ifndef PNG_NO_READ_tEXt
1023 # define PNG_READ_tEXt_SUPPORTED
1024 # define PNG_tEXt_SUPPORTED
1025 #endif
1026 #ifndef PNG_NO_READ_tIME
1027 # define PNG_READ_tIME_SUPPORTED
1028 # define PNG_tIME_SUPPORTED
1029 #endif
1030 #ifndef PNG_NO_READ_tRNS
1031 # define PNG_READ_tRNS_SUPPORTED
1032 # define PNG_tRNS_SUPPORTED
1033 #endif
1034 #ifndef PNG_NO_READ_zTXt
1035 # define PNG_READ_zTXt_SUPPORTED
1036 # define PNG_zTXt_SUPPORTED
1037 #endif
1038 #ifndef PNG_NO_READ_OPT_PLTE
1039 # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
1040 #endif /* optional PLTE chunk in RGB and RGBA images */
1041 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
1042 defined(PNG_READ_zTXt_SUPPORTED)
1043 # define PNG_READ_TEXT_SUPPORTED
1044 # define PNG_TEXT_SUPPORTED
1045 #endif
1046
1047 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
1048
1049 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
1050 # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1051 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1052 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1053 # endif
1054 #endif
1055 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
1056 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
1057 # define PNG_READ_USER_CHUNKS_SUPPORTED
1058 # define PNG_USER_CHUNKS_SUPPORTED
1059 # ifdef PNG_NO_READ_UNKNOWN_CHUNKS
1060 # undef PNG_NO_READ_UNKNOWN_CHUNKS
1061 # endif
1062 # ifdef PNG_NO_HANDLE_AS_UNKNOWN
1063 # undef PNG_NO_HANDLE_AS_UNKNOWN
1064 # endif
1065 #endif
1066
1067 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1068 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1069 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1070 # endif
1071 #endif
1072
1073 #ifdef PNG_WRITE_SUPPORTED
1074 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
1075
1076 #ifdef PNG_NO_WRITE_TEXT
1077 # define PNG_NO_WRITE_iTXt
1078 # define PNG_NO_WRITE_tEXt
1079 # define PNG_NO_WRITE_zTXt
1080 #endif
1081 #ifndef PNG_NO_WRITE_bKGD
1082 # define PNG_WRITE_bKGD_SUPPORTED
1083 # ifndef PNG_bKGD_SUPPORTED
1084 # define PNG_bKGD_SUPPORTED
1085 # endif
1086 #endif
1087 #ifndef PNG_NO_WRITE_cHRM
1088 # define PNG_WRITE_cHRM_SUPPORTED
1089 # ifndef PNG_cHRM_SUPPORTED
1090 # define PNG_cHRM_SUPPORTED
1091 # endif
1092 #endif
1093 #ifndef PNG_NO_WRITE_gAMA
1094 # define PNG_WRITE_gAMA_SUPPORTED
1095 # ifndef PNG_gAMA_SUPPORTED
1096 # define PNG_gAMA_SUPPORTED
1097 # endif
1098 #endif
1099 #ifndef PNG_NO_WRITE_hIST
1100 # define PNG_WRITE_hIST_SUPPORTED
1101 # ifndef PNG_hIST_SUPPORTED
1102 # define PNG_hIST_SUPPORTED
1103 # endif
1104 #endif
1105 #ifndef PNG_NO_WRITE_iCCP
1106 # define PNG_WRITE_iCCP_SUPPORTED
1107 # ifndef PNG_iCCP_SUPPORTED
1108 # define PNG_iCCP_SUPPORTED
1109 # endif
1110 #endif
1111 #ifndef PNG_NO_WRITE_iTXt
1112 # ifndef PNG_WRITE_iTXt_SUPPORTED
1113 # define PNG_WRITE_iTXt_SUPPORTED
1114 # endif
1115 # ifndef PNG_iTXt_SUPPORTED
1116 # define PNG_iTXt_SUPPORTED
1117 # endif
1118 #endif
1119 #ifndef PNG_NO_WRITE_oFFs
1120 # define PNG_WRITE_oFFs_SUPPORTED
1121 # ifndef PNG_oFFs_SUPPORTED
1122 # define PNG_oFFs_SUPPORTED
1123 # endif
1124 #endif
1125 #ifndef PNG_NO_WRITE_pCAL
1126 # define PNG_WRITE_pCAL_SUPPORTED
1127 # ifndef PNG_pCAL_SUPPORTED
1128 # define PNG_pCAL_SUPPORTED
1129 # endif
1130 #endif
1131 #ifndef PNG_NO_WRITE_sCAL
1132 # define PNG_WRITE_sCAL_SUPPORTED
1133 # ifndef PNG_sCAL_SUPPORTED
1134 # define PNG_sCAL_SUPPORTED
1135 # endif
1136 #endif
1137 #ifndef PNG_NO_WRITE_pHYs
1138 # define PNG_WRITE_pHYs_SUPPORTED
1139 # ifndef PNG_pHYs_SUPPORTED
1140 # define PNG_pHYs_SUPPORTED
1141 # endif
1142 #endif
1143 #ifndef PNG_NO_WRITE_sBIT
1144 # define PNG_WRITE_sBIT_SUPPORTED
1145 # ifndef PNG_sBIT_SUPPORTED
1146 # define PNG_sBIT_SUPPORTED
1147 # endif
1148 #endif
1149 #ifndef PNG_NO_WRITE_sPLT
1150 # define PNG_WRITE_sPLT_SUPPORTED
1151 # ifndef PNG_sPLT_SUPPORTED
1152 # define PNG_sPLT_SUPPORTED
1153 # endif
1154 #endif
1155 #ifndef PNG_NO_WRITE_sRGB
1156 # define PNG_WRITE_sRGB_SUPPORTED
1157 # ifndef PNG_sRGB_SUPPORTED
1158 # define PNG_sRGB_SUPPORTED
1159 # endif
1160 #endif
1161 #ifndef PNG_NO_WRITE_tEXt
1162 # define PNG_WRITE_tEXt_SUPPORTED
1163 # ifndef PNG_tEXt_SUPPORTED
1164 # define PNG_tEXt_SUPPORTED
1165 # endif
1166 #endif
1167 #ifndef PNG_NO_WRITE_tIME
1168 # define PNG_WRITE_tIME_SUPPORTED
1169 # ifndef PNG_tIME_SUPPORTED
1170 # define PNG_tIME_SUPPORTED
1171 # endif
1172 #endif
1173 #ifndef PNG_NO_WRITE_tRNS
1174 # define PNG_WRITE_tRNS_SUPPORTED
1175 # ifndef PNG_tRNS_SUPPORTED
1176 # define PNG_tRNS_SUPPORTED
1177 # endif
1178 #endif
1179 #ifndef PNG_NO_WRITE_zTXt
1180 # define PNG_WRITE_zTXt_SUPPORTED
1181 # ifndef PNG_zTXt_SUPPORTED
1182 # define PNG_zTXt_SUPPORTED
1183 # endif
1184 #endif
1185 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1186 defined(PNG_WRITE_zTXt_SUPPORTED)
1187 # define PNG_WRITE_TEXT_SUPPORTED
1188 # ifndef PNG_TEXT_SUPPORTED
1189 # define PNG_TEXT_SUPPORTED
1190 # endif
1191 #endif
1192
1193 #ifdef PNG_WRITE_tIME_SUPPORTED
1194 # ifndef PNG_NO_CONVERT_tIME
1195 # ifndef _WIN32_WCE
1196 /* The "tm" structure is not supported on WindowsCE */
1197 # ifndef PNG_CONVERT_tIME_SUPPORTED
1198 # define PNG_CONVERT_tIME_SUPPORTED
1199 # endif
1200 # endif
1201 # endif
1202 #endif
1203
1204 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1205
1206 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
1207 # define PNG_WRITE_FILTER_SUPPORTED
1208 #endif
1209
1210 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1211 # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1212 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1213 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1214 # endif
1215 #endif
1216
1217 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1218 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1219 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1220 # endif
1221 #endif
1222 #endif /* PNG_WRITE_SUPPORTED */
1223
1224 /* Turn this off to disable png_read_png() and
1225 * png_write_png() and leave the row_pointers member
1226 * out of the info structure.
1227 */
1228 #ifndef PNG_NO_INFO_IMAGE
1229 # define PNG_INFO_IMAGE_SUPPORTED
1230 #endif
1231
1232 /* Need the time information for converting tIME chunks */
1233 #ifdef PNG_CONVERT_tIME_SUPPORTED
1234 /* "time.h" functions are not supported on WindowsCE */
1235 # include <time.h>
1236 #endif
1237
1238 /* Some typedefs to get us started. These should be safe on most of the
1239 * common platforms. The typedefs should be at least as large as the
1240 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1241 * don't have to be exactly that size. Some compilers dislike passing
1242 * unsigned shorts as function parameters, so you may be better off using
1243 * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
1244 * want to have unsigned int for png_uint_32 instead of unsigned long.
1245 */
1246
1247 typedef unsigned long png_uint_32;
1248 typedef long png_int_32;
1249 typedef unsigned short png_uint_16;
1250 typedef short png_int_16;
1251 typedef unsigned char png_byte;
1252
1253 /* This is usually size_t. It is typedef'ed just in case you need it to
1254 change (I'm not sure if you will or not, so I thought I'd be safe) */
1255 #ifdef PNG_SIZE_T
1256 typedef PNG_SIZE_T png_size_t;
1257 # define png_sizeof(x) png_convert_size(sizeof(x))
1258 #else
1259 typedef size_t png_size_t;
1260 # define png_sizeof(x) sizeof(x)
1261 #endif
1262
1263 /* The following is needed for medium model support. It cannot be in the
1264 * PNG_INTERNAL section. Needs modification for other compilers besides
1265 * MSC. Model independent support declares all arrays and pointers to be
1266 * large using the far keyword. The zlib version used must also support
1267 * model independent data. As of version zlib 1.0.4, the necessary changes
1268 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1269 * changes that are needed. (Tim Wegner)
1270 */
1271
1272 /* Separate compiler dependencies (problem here is that zlib.h always
1273 defines FAR. (SJT) */
1274 #ifdef __BORLANDC__
1275 # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1276 # define LDATA 1
1277 # else
1278 # define LDATA 0
1279 # endif
1280 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1281 # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1282 # define PNG_MAX_MALLOC_64K
1283 # if (LDATA != 1)
1284 # ifndef FAR
1285 # define FAR __far
1286 # endif
1287 # define USE_FAR_KEYWORD
1288 # endif /* LDATA != 1 */
1289 /* Possibly useful for moving data out of default segment.
1290 * Uncomment it if you want. Could also define FARDATA as
1291 * const if your compiler supports it. (SJT)
1292 # define FARDATA FAR
1293 */
1294 # endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1295 #endif /* __BORLANDC__ */
1296
1297
1298 /* Suggest testing for specific compiler first before testing for
1299 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1300 * making reliance oncertain keywords suspect. (SJT)
1301 */
1302
1303 /* MSC Medium model */
1304 #ifdef FAR
1305 # ifdef M_I86MM
1306 # define USE_FAR_KEYWORD
1307 # define FARDATA FAR
1308 # include <dos.h>
1309 # endif
1310 #endif
1311
1312 /* SJT: default case */
1313 #ifndef FAR
1314 # define FAR
1315 #endif
1316
1317 /* At this point FAR is always defined */
1318 #ifndef FARDATA
1319 # define FARDATA
1320 #endif
1321
1322 /* Typedef for floating-point numbers that are converted
1323 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1324 typedef png_int_32 png_fixed_point;
1325
1326 /* Add typedefs for pointers */
1327 typedef void FAR * png_voidp;
1328 typedef png_byte FAR * png_bytep;
1329 typedef png_uint_32 FAR * png_uint_32p;
1330 typedef png_int_32 FAR * png_int_32p;
1331 typedef png_uint_16 FAR * png_uint_16p;
1332 typedef png_int_16 FAR * png_int_16p;
1333 typedef PNG_CONST char FAR * png_const_charp;
1334 typedef char FAR * png_charp;
1335 typedef png_fixed_point FAR * png_fixed_point_p;
1336
1337 #ifndef PNG_NO_STDIO
1338 #ifdef _WIN32_WCE
1339 typedef HANDLE png_FILE_p;
1340 #else
1341 typedef FILE * png_FILE_p;
1342 #endif
1343 #endif
1344
1345 #ifdef PNG_FLOATING_POINT_SUPPORTED
1346 typedef double FAR * png_doublep;
1347 #endif
1348
1349 /* Pointers to pointers; i.e. arrays */
1350 typedef png_byte FAR * FAR * png_bytepp;
1351 typedef png_uint_32 FAR * FAR * png_uint_32pp;
1352 typedef png_int_32 FAR * FAR * png_int_32pp;
1353 typedef png_uint_16 FAR * FAR * png_uint_16pp;
1354 typedef png_int_16 FAR * FAR * png_int_16pp;
1355 typedef PNG_CONST char FAR * FAR * png_const_charpp;
1356 typedef char FAR * FAR * png_charpp;
1357 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1358 #ifdef PNG_FLOATING_POINT_SUPPORTED
1359 typedef double FAR * FAR * png_doublepp;
1360 #endif
1361
1362 /* Pointers to pointers to pointers; i.e., pointer to array */
1363 typedef char FAR * FAR * FAR * png_charppp;
1364
1365 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1366 /* SPC - Is this stuff deprecated? */
1367 /* It'll be removed as of libpng-1.4.0 - GR-P */
1368 /* libpng typedefs for types in zlib. If zlib changes
1369 * or another compression library is used, then change these.
1370 * Eliminates need to change all the source files.
1371 */
1372 typedef charf * png_zcharp;
1373 typedef charf * FAR * png_zcharpp;
1374 typedef z_stream FAR * png_zstreamp;
1375 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1376
1377 /*
1378 * Define PNG_BUILD_DLL if the module being built is a Windows
1379 * LIBPNG DLL.
1380 *
1381 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1382 * It is equivalent to Microsoft predefined macro _DLL that is
1383 * automatically defined when you compile using the share
1384 * version of the CRT (C Run-Time library)
1385 *
1386 * The cygwin mods make this behavior a little different:
1387 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1388 * Define PNG_STATIC if you are building a static library for use with cygwin,
1389 * -or- if you are building an application that you want to link to the
1390 * static library.
1391 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1392 * the other flags is defined.
1393 */
1394
1395 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1396 # define PNG_DLL
1397 #endif
1398 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1399 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1400 * command-line override
1401 */
1402 #ifdef __CYGWIN__
1403 # ifndef PNG_STATIC
1404 # ifdef PNG_USE_GLOBAL_ARRAYS
1405 # undef PNG_USE_GLOBAL_ARRAYS
1406 # endif
1407 # ifndef PNG_USE_LOCAL_ARRAYS
1408 # define PNG_USE_LOCAL_ARRAYS
1409 # endif
1410 # else
1411 # if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1412 # ifdef PNG_USE_GLOBAL_ARRAYS
1413 # undef PNG_USE_GLOBAL_ARRAYS
1414 # endif
1415 # endif
1416 # endif
1417 # if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1418 # define PNG_USE_LOCAL_ARRAYS
1419 # endif
1420 #endif
1421
1422 /* Do not use global arrays (helps with building DLL's)
1423 * They are no longer used in libpng itself, since version 1.0.5c,
1424 * but might be required for some pre-1.0.5c applications.
1425 */
1426 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1427 # if defined(PNG_NO_GLOBAL_ARRAYS) || \
1428 (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1429 # define PNG_USE_LOCAL_ARRAYS
1430 # else
1431 # define PNG_USE_GLOBAL_ARRAYS
1432 # endif
1433 #endif
1434
1435 #ifdef __CYGWIN__
1436 # undef PNGAPI
1437 # define PNGAPI __cdecl
1438 # undef PNG_IMPEXP
1439 # define PNG_IMPEXP
1440 #endif
1441
1442 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1443 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1444 * Don't ignore those warnings; you must also reset the default calling
1445 * convention in your compiler to match your PNGAPI, and you must build
1446 * zlib and your applications the same way you build libpng.
1447 */
1448
1449 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1450 # ifndef PNG_NO_MODULEDEF
1451 # define PNG_NO_MODULEDEF
1452 # endif
1453 #endif
1454
1455 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1456 # define PNG_IMPEXP
1457 #endif
1458
1459 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1460 (( defined(_Windows) || defined(_WINDOWS) || \
1461 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1462
1463 # ifndef PNGAPI
1464 # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1465 # define PNGAPI __cdecl
1466 # else
1467 # define PNGAPI _cdecl
1468 # endif
1469 # endif
1470
1471 # if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1472 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1473 # define PNG_IMPEXP
1474 # endif 272 # endif
1475 273
1476 # ifndef PNG_IMPEXP 274 # ifndef PNG_IMPEXP
1477 275 # define PNG_IMPEXP
1478 # define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol 276 # endif
1479 # define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol 277 #endif
1480 278
1481 /* Borland/Microsoft */ 279 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
1482 # if defined(_MSC_VER) || defined(__BORLANDC__) 280 * 'attributes' as a storage class - the attributes go at the start of the
1483 # if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500) 281 * function definition, and attributes are always appended regardless of the
1484 # define PNG_EXPORT PNG_EXPORT_TYPE1 282 * compiler. This considerably simplifies these macros but may cause problems
1485 # else 283 * if any compilers both need function attributes and fail to handle them as
1486 # define PNG_EXPORT PNG_EXPORT_TYPE2 284 * a storage class (this is unlikely.)
1487 # ifdef PNG_BUILD_DLL 285 */
1488 # define PNG_IMPEXP __export 286 #ifndef PNG_FUNCTION
1489 # else 287 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
1490 # define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in 288 #endif
1491 VC++ */ 289
1492 # endif /* Exists in Borland C++ for 290 #ifndef PNG_EXPORT_TYPE
1493 C++ classes (== huge) */ 291 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
1494 # endif 292 #endif
1495 # endif 293
1496 294 /* The ordinal value is only relevant when preprocessing png.h for symbol
1497 # ifndef PNG_IMPEXP 295 * table entries, so we discard it here. See the .dfn files in the
1498 # ifdef PNG_BUILD_DLL 296 * scripts directory.
1499 # define PNG_IMPEXP __declspec(dllexport) 297 */
1500 # else 298
1501 # define PNG_IMPEXP __declspec(dllimport) 299 #ifndef PNG_EXPORTA
1502 # endif 300 # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
1503 # endif 301 PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
1504 # endif /* PNG_IMPEXP */ 302 PNG_LINKAGE_API attributes)
1505 #else /* !(DLL || non-cygwin WINDOWS) */ 303 #endif
1506 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) 304
1507 # ifndef PNGAPI 305 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
1508 # define PNGAPI _System 306 * so make something non-empty to satisfy the requirement:
1509 # endif 307 */
1510 # else 308 #define PNG_EMPTY /*empty list*/
1511 # if 0 /* ... other platforms, with other meanings */ 309
1512 # endif 310 #define PNG_EXPORT(ordinal, type, name, args) \
1513 # endif 311 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
1514 #endif 312
1515 313 /* Use PNG_REMOVED to comment out a removed interface. */
1516 #ifndef PNGAPI 314 #ifndef PNG_REMOVED
1517 # define PNGAPI 315 # define PNG_REMOVED(ordinal, type, name, args, attributes)
1518 #endif 316 #endif
1519 #ifndef PNG_IMPEXP 317
1520 # define PNG_IMPEXP 318 #ifndef PNG_CALLBACK
1521 #endif 319 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
1522 320 #endif
1523 #ifdef PNG_BUILDSYMS 321
1524 # ifndef PNG_EXPORT 322 /* Support for compiler specific function attributes. These are used
1525 # define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END 323 * so that where compiler support is available incorrect use of API
1526 # endif 324 * functions in png.h will generate compiler warnings.
1527 # ifdef PNG_USE_GLOBAL_ARRAYS 325 *
1528 # ifndef PNG_EXPORT_VAR 326 * Added at libpng-1.2.41.
1529 # define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT 327 */
1530 # endif 328
1531 # endif 329 #ifndef PNG_NO_PEDANTIC_WARNINGS
1532 #endif
1533
1534 #ifndef PNG_EXPORT
1535 # define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1536 #endif
1537
1538 #ifdef PNG_USE_GLOBAL_ARRAYS
1539 # ifndef PNG_EXPORT_VAR
1540 # define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1541 # endif
1542 #endif
1543
1544 #ifdef PNG_PEDANTIC_WARNINGS
1545 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED 330 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1546 # define PNG_PEDANTIC_WARNINGS_SUPPORTED 331 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
1547 # endif 332 # endif
1548 #endif 333 #endif
1549 334
1550 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED 335 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1551 /* Support for compiler specific function attributes. These are used 336 /* Support for compiler specific function attributes. These are used
1552 * so that where compiler support is available incorrect use of API 337 * so that where compiler support is available, incorrect use of API
1553 * functions in png.h will generate compiler warnings. Added at libpng 338 * functions in png.h will generate compiler warnings. Added at libpng
1554 * version 1.2.41. 339 * version 1.2.41. Disabling these removes the warnings but may also produce
1555 */ 340 * less efficient code.
1556 # ifdef __GNUC__ 341 */
342 # if defined(__clang__) && defined(__has_attribute)
343 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
344 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
345 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
346 # endif
347 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
348 # define PNG_NORETURN __attribute__((__noreturn__))
349 # endif
350 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
351 # define PNG_ALLOCATED __attribute__((__malloc__))
352 # endif
353 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
354 # define PNG_DEPRECATED __attribute__((__deprecated__))
355 # endif
356 # if !defined(PNG_PRIVATE)
357 # ifdef __has_extension
358 # if __has_extension(attribute_unavailable_with_message)
359 # define PNG_PRIVATE __attribute__((__unavailable__(\
360 "This function is not exported by libpng.")))
361 # endif
362 # endif
363 # endif
364 # ifndef PNG_RESTRICT
365 # define PNG_RESTRICT __restrict
366 # endif
367
368 # elif defined(__GNUC__)
1557 # ifndef PNG_USE_RESULT 369 # ifndef PNG_USE_RESULT
1558 # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) 370 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1559 # endif 371 # endif
1560 # ifndef PNG_NORETURN 372 # ifndef PNG_NORETURN
1561 # define PNG_NORETURN __attribute__((__noreturn__)) 373 # define PNG_NORETURN __attribute__((__noreturn__))
1562 # endif 374 # endif
375 # if __GNUC__ >= 3
376 # ifndef PNG_ALLOCATED
377 # define PNG_ALLOCATED __attribute__((__malloc__))
378 # endif
379 # ifndef PNG_DEPRECATED
380 # define PNG_DEPRECATED __attribute__((__deprecated__))
381 # endif
382 # ifndef PNG_PRIVATE
383 # if 0 /* Doesn't work so we use deprecated instead*/
384 # define PNG_PRIVATE \
385 __attribute__((warning("This function is not exported by libpng.")))
386 # else
387 # define PNG_PRIVATE \
388 __attribute__((__deprecated__))
389 # endif
390 # endif
391 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
392 # ifndef PNG_RESTRICT
393 # define PNG_RESTRICT __restrict
394 # endif
395 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
396 # endif /* __GNUC__ >= 3 */
397
398 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
399 # ifndef PNG_USE_RESULT
400 # define PNG_USE_RESULT /* not supported */
401 # endif
402 # ifndef PNG_NORETURN
403 # define PNG_NORETURN __declspec(noreturn)
404 # endif
1563 # ifndef PNG_ALLOCATED 405 # ifndef PNG_ALLOCATED
1564 # define PNG_ALLOCATED __attribute__((__malloc__)) 406 # if (_MSC_VER >= 1400)
1565 # endif 407 # define PNG_ALLOCATED __declspec(restrict)
1566 408 # endif
1567 /* This specifically protects structure members that should only be 409 # endif
1568 * accessed from within the library, therefore should be empty during
1569 * a library build.
1570 */
1571 # ifndef PNG_DEPRECATED 410 # ifndef PNG_DEPRECATED
1572 # define PNG_DEPRECATED __attribute__((__deprecated__)) 411 # define PNG_DEPRECATED __declspec(deprecated)
1573 # endif
1574 # ifndef PNG_DEPSTRUCT
1575 # define PNG_DEPSTRUCT __attribute__((__deprecated__))
1576 # endif 412 # endif
1577 # ifndef PNG_PRIVATE 413 # ifndef PNG_PRIVATE
1578 # if 0 /* Doesn't work so we use deprecated instead*/ 414 # define PNG_PRIVATE __declspec(deprecated)
1579 # define PNG_PRIVATE \ 415 # endif
1580 __attribute__((warning("This function is not exported by libpng."))) 416 # ifndef PNG_RESTRICT
1581 # else 417 # if (_MSC_VER >= 1400)
1582 # define PNG_PRIVATE \ 418 # define PNG_RESTRICT __restrict
1583 __attribute__((__deprecated__)) 419 # endif
1584 # endif 420 # endif
1585 # endif /* PNG_PRIVATE */ 421
1586 # endif /* __GNUC__ */ 422 # elif defined(__WATCOMC__)
423 # ifndef PNG_RESTRICT
424 # define PNG_RESTRICT __restrict
425 # endif
426 # endif
1587 #endif /* PNG_PEDANTIC_WARNINGS */ 427 #endif /* PNG_PEDANTIC_WARNINGS */
1588 428
1589 #ifndef PNG_DEPRECATED 429 #ifndef PNG_DEPRECATED
1590 # define PNG_DEPRECATED /* Use of this function is deprecated */ 430 # define PNG_DEPRECATED /* Use of this function is deprecated */
1591 #endif 431 #endif
1592 #ifndef PNG_USE_RESULT 432 #ifndef PNG_USE_RESULT
1593 # define PNG_USE_RESULT /* The result of this function must be checked */ 433 # define PNG_USE_RESULT /* The result of this function must be checked */
1594 #endif 434 #endif
1595 #ifndef PNG_NORETURN 435 #ifndef PNG_NORETURN
1596 # define PNG_NORETURN /* This function does not return */ 436 # define PNG_NORETURN /* This function does not return */
1597 #endif 437 #endif
1598 #ifndef PNG_ALLOCATED 438 #ifndef PNG_ALLOCATED
1599 # define PNG_ALLOCATED /* The result of the function is new memory */ 439 # define PNG_ALLOCATED /* The result of the function is new memory */
1600 #endif 440 #endif
1601 #ifndef PNG_DEPSTRUCT
1602 # define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
1603 #endif
1604 #ifndef PNG_PRIVATE 441 #ifndef PNG_PRIVATE
1605 # define PNG_PRIVATE /* This is a private libpng function */ 442 # define PNG_PRIVATE /* This is a private libpng function */
1606 #endif 443 #endif
444 #ifndef PNG_RESTRICT
445 # define PNG_RESTRICT /* The C99 "restrict" feature */
446 #endif
1607 447
1608 /* User may want to use these so they are not in PNG_INTERNAL. Any library 448 #ifndef PNG_FP_EXPORT /* A floating point API. */
1609 * functions that are passed far data must be model independent. 449 # ifdef PNG_FLOATING_POINT_SUPPORTED
450 # define PNG_FP_EXPORT(ordinal, type, name, args)\
451 PNG_EXPORT(ordinal, type, name, args);
452 # else /* No floating point APIs */
453 # define PNG_FP_EXPORT(ordinal, type, name, args)
454 # endif
455 #endif
456 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
457 # ifdef PNG_FIXED_POINT_SUPPORTED
458 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
459 PNG_EXPORT(ordinal, type, name, args);
460 # else /* No fixed point APIs */
461 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
462 # endif
463 #endif
464
465 #ifndef PNG_BUILDING_SYMBOL_TABLE
466 /* Some typedefs to get us started. These should be safe on most of the common
467 * platforms.
468 *
469 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
470 * 32-bit value however this is not normally advisable.
471 *
472 * png_uint_16 and png_int_16 should always be two bytes in size - this is
473 * verified at library build time.
474 *
475 * png_byte must always be one byte in size.
476 *
477 * The checks below use constants from limits.h, as defined by the ISOC90
478 * standard.
479 */
480 #if CHAR_BIT == 8 && UCHAR_MAX == 255
481 typedef unsigned char png_byte;
482 #else
483 # error "libpng requires 8-bit bytes"
484 #endif
485
486 #if INT_MIN == -32768 && INT_MAX == 32767
487 typedef int png_int_16;
488 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
489 typedef short png_int_16;
490 #else
491 # error "libpng requires a signed 16-bit type"
492 #endif
493
494 #if UINT_MAX == 65535
495 typedef unsigned int png_uint_16;
496 #elif USHRT_MAX == 65535
497 typedef unsigned short png_uint_16;
498 #else
499 # error "libpng requires an unsigned 16-bit type"
500 #endif
501
502 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
503 typedef int png_int_32;
504 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
505 typedef long int png_int_32;
506 #else
507 # error "libpng requires a signed 32-bit (or more) type"
508 #endif
509
510 #if UINT_MAX > 4294967294
511 typedef unsigned int png_uint_32;
512 #elif ULONG_MAX > 4294967294
513 typedef unsigned long int png_uint_32;
514 #else
515 # error "libpng requires an unsigned 32-bit (or more) type"
516 #endif
517
518 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
519 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
520 */
521 typedef size_t png_size_t;
522 typedef ptrdiff_t png_ptrdiff_t;
523
524 /* libpng needs to know the maximum value of 'size_t' and this controls the
525 * definition of png_alloc_size_t, below. This maximum value of size_t limits
526 * but does not control the maximum allocations the library makes - there is
527 * direct application control of this through png_set_user_limits().
528 */
529 #ifndef PNG_SMALL_SIZE_T
530 /* Compiler specific tests for systems where size_t is known to be less than
531 * 32 bits (some of these systems may no longer work because of the lack of
532 * 'far' support; see above.)
533 */
534 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
535 (defined(_MSC_VER) && defined(MAXSEG_64K))
536 # define PNG_SMALL_SIZE_T
537 # endif
538 #endif
539
540 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
541 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to
542 * png_alloc_size_t are not necessary; in fact, it is recommended not to use
543 * them at all so that the compiler can complain when something turns out to be
544 * problematic.
545 *
546 * Casts in the other direction (from png_alloc_size_t to png_size_t or
547 * png_uint_32) should be explicitly applied; however, we do not expect to
548 * encounter practical situations that require such conversions.
549 *
550 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
551 * 4294967295 - i.e. less than the maximum value of png_uint_32.
552 */
553 #ifdef PNG_SMALL_SIZE_T
554 typedef png_uint_32 png_alloc_size_t;
555 #else
556 typedef png_size_t png_alloc_size_t;
557 #endif
558
559 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
560 * implementations of Intel CPU specific support of user-mode segmented address
561 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
562 * separate 'segment' registers. The implementation requires two different
563 * types of pointer (only one of which includes the segment value.)
564 *
565 * If required this support is available in version 1.2 of libpng and may be
566 * available in versions through 1.5, although the correctness of the code has
567 * not been verified recently.
1610 */ 568 */
1611 569
1612 #ifndef PNG_ABORT 570 /* Typedef for floating-point numbers that are converted to fixed-point with a
1613 # define PNG_ABORT() abort() 571 * multiple of 100,000, e.g., gamma
572 */
573 typedef png_int_32 png_fixed_point;
574
575 /* Add typedefs for pointers */
576 typedef void * png_voidp;
577 typedef const void * png_const_voidp;
578 typedef png_byte * png_bytep;
579 typedef const png_byte * png_const_bytep;
580 typedef png_uint_32 * png_uint_32p;
581 typedef const png_uint_32 * png_const_uint_32p;
582 typedef png_int_32 * png_int_32p;
583 typedef const png_int_32 * png_const_int_32p;
584 typedef png_uint_16 * png_uint_16p;
585 typedef const png_uint_16 * png_const_uint_16p;
586 typedef png_int_16 * png_int_16p;
587 typedef const png_int_16 * png_const_int_16p;
588 typedef char * png_charp;
589 typedef const char * png_const_charp;
590 typedef png_fixed_point * png_fixed_point_p;
591 typedef const png_fixed_point * png_const_fixed_point_p;
592 typedef png_size_t * png_size_tp;
593 typedef const png_size_t * png_const_size_tp;
594
595 #ifdef PNG_STDIO_SUPPORTED
596 typedef FILE * png_FILE_p;
1614 #endif 597 #endif
1615 598
1616 #ifdef PNG_SETJMP_SUPPORTED 599 #ifdef PNG_FLOATING_POINT_SUPPORTED
1617 # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) 600 typedef double * png_doublep;
1618 #else 601 typedef const double * png_const_doublep;
1619 # define png_jmpbuf(png_ptr) \
1620 (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED)
1621 #endif 602 #endif
1622 603
1623 #ifdef USE_FAR_KEYWORD /* memory model independent fns */ 604 /* Pointers to pointers; i.e. arrays */
1624 /* Use this to make far-to-near assignments */ 605 typedef png_byte * * png_bytepp;
1625 # define CHECK 1 606 typedef png_uint_32 * * png_uint_32pp;
1626 # define NOCHECK 0 607 typedef png_int_32 * * png_int_32pp;
1627 # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) 608 typedef png_uint_16 * * png_uint_16pp;
1628 # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) 609 typedef png_int_16 * * png_int_16pp;
1629 # define png_snprintf _fsnprintf /* Added to v 1.2.19 */ 610 typedef const char * * png_const_charpp;
1630 # define png_strlen _fstrlen 611 typedef char * * png_charpp;
1631 # define png_memcmp _fmemcmp /* SJT: added */ 612 typedef png_fixed_point * * png_fixed_point_pp;
1632 # define png_memcpy _fmemcpy 613 #ifdef PNG_FLOATING_POINT_SUPPORTED
1633 # define png_memset _fmemset 614 typedef double * * png_doublepp;
1634 #else /* Use the usual functions */
1635 # define CVT_PTR(ptr) (ptr)
1636 # define CVT_PTR_NOCHECK(ptr) (ptr)
1637 # ifndef PNG_NO_SNPRINTF
1638 # ifdef _MSC_VER
1639 # define png_snprintf _snprintf /* Added to v 1.2.19 */
1640 # define png_snprintf2 _snprintf
1641 # define png_snprintf6 _snprintf
1642 # else
1643 # define png_snprintf snprintf /* Added to v 1.2.19 */
1644 # define png_snprintf2 snprintf
1645 # define png_snprintf6 snprintf
1646 # endif
1647 # else
1648 /* You don't have or don't want to use snprintf(). Caution: Using
1649 * sprintf instead of snprintf exposes your application to accidental
1650 * or malevolent buffer overflows. If you don't have snprintf()
1651 * as a general rule you should provide one (you can get one from
1652 * Portable OpenSSH).
1653 */
1654 # define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)
1655 # define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)
1656 # define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
1657 sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
1658 # endif
1659 # define png_strlen strlen
1660 # define png_memcmp memcmp /* SJT: added */
1661 # define png_memcpy memcpy
1662 # define png_memset memset
1663 #endif
1664 /* End of memory model independent support */
1665
1666 /* Just a little check that someone hasn't tried to define something
1667 * contradictory.
1668 */
1669 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
1670 # undef PNG_ZBUF_SIZE
1671 # define PNG_ZBUF_SIZE 65536L
1672 #endif 615 #endif
1673 616
1674 /* Added at libpng-1.2.8 */ 617 /* Pointers to pointers to pointers; i.e., pointer to array */
1675 #endif /* PNG_VERSION_INFO_ONLY */ 618 typedef char * * * png_charppp;
619
620 #endif /* PNG_BUILDING_SYMBOL_TABLE */
1676 621
1677 #endif /* PNGCONF_H */ 622 #endif /* PNGCONF_H */
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