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Issue 23271006: libpng 1.6.3 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Remove trailing whitespaces. Created 7 years, 3 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 1.2.45 - July 7, 2011 4 * libpng version 1.6.3 - July 18, 2013
5 * Copyright (c) 1998-2011 Glenn Randers-Pehrson 5 *
6 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (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.)
8 * 9 *
9 * This code is released under the libpng license. 10 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer 11 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h 12 * and license in png.h
13 *
12 */ 14 */
13 15
14 /* Any machine specific code is near the front of this file, so if you 16 /* 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 17 * 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, 18 * starting here down to where it starts to typedef png_color, png_text,
17 * and png_info. 19 * and png_info.
18 */ 20 */
19 21
20 #ifndef PNGCONF_H 22 #ifndef PNGCONF_H
21 #define PNGCONF_H 23 #define PNGCONF_H
22 24
23 #define PNG_1_2_X 25 /* To do: Do all of this in scripts/pnglibconf.dfa */
24 26 #ifdef PNG_SAFE_LIMITS_SUPPORTED
25 /* 27 # ifdef PNG_USER_WIDTH_MAX
26 * PNG_USER_CONFIG has to be defined on the compiler command line. This 28 # undef PNG_USER_WIDTH_MAX
27 * includes the resource compiler for Windows DLL configurations. 29 # define PNG_USER_WIDTH_MAX 1000000L
28 */ 30 # endif
29 #ifdef PNG_USER_CONFIG 31 # ifdef PNG_USER_HEIGHT_MAX
30 # ifndef PNG_USER_PRIVATEBUILD 32 # undef PNG_USER_HEIGHT_MAX
31 # define PNG_USER_PRIVATEBUILD 33 # define PNG_USER_HEIGHT_MAX 1000000L
32 # endif 34 # endif
33 #include "pngusr.h" 35 # ifdef PNG_USER_CHUNK_MALLOC_MAX
34 #endif 36 # undef PNG_USER_CHUNK_MALLOC_MAX
35 37 # define PNG_USER_CHUNK_MALLOC_MAX 4000000L
36 /* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */ 38 # endif
37 #ifdef PNG_CONFIGURE_LIBPNG 39 # ifdef PNG_USER_CHUNK_CACHE_MAX
38 #ifdef HAVE_CONFIG_H 40 # undef PNG_USER_CHUNK_CACHE_MAX
39 #include "config.h" 41 # define PNG_USER_CHUNK_CACHE_MAX 128
40 #endif 42 # endif
41 #endif 43 #endif
42 44
43 /* 45 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
44 * Added at libpng-1.2.8 46
45 * 47 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
46 * If you create a private DLL you need to define in "pngusr.h" the followings: 48 * compiler for correct compilation. The following header files are required by
47 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of 49 * the standard. If your compiler doesn't provide these header files, or they
48 * the DLL was built> 50 * do not match the standard, you will need to provide/improve them.
49 * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons." 51 */
50 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to 52 #include <limits.h>
51 * distinguish your DLL from those of the official release. These 53 #include <stddef.h>
52 * correspond to the trailing letters that come after the version 54
53 * number and must match your private DLL name> 55 /* Library header files. These header files are all defined by ISOC90; libpng
54 * e.g. // private DLL "libpng13gx.dll" 56 * expects conformant implementations, however, an ISOC90 conformant system need
55 * #define PNG_USER_DLLFNAME_POSTFIX "gx" 57 * not provide these header files if the functionality cannot be implemented.
56 * 58 * In this case it will be necessary to disable the relevant parts of libpng in
57 * The following macros are also at your disposal if you want to complete the 59 * the build of pnglibconf.h.
58 * DLL VERSIONINFO structure. 60 *
59 * - PNG_USER_VERSIONINFO_COMMENTS 61 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
60 * - PNG_USER_VERSIONINFO_COMPANYNAME 62 * include this unnecessary header file.
61 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS 63 */
62 */ 64
63 65 #ifdef PNG_STDIO_SUPPORTED
64 #ifdef __STDC__ 66 /* Required for the definition of FILE: */
65 #ifdef SPECIALBUILD 67 # include <stdio.h>
66 # pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\ 68 #endif
67 are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.") 69
68 #endif 70 #ifdef PNG_SETJMP_SUPPORTED
69 71 /* Required for the definition of jmp_buf and the declaration of longjmp: */
70 #ifdef PRIVATEBUILD 72 # include <setjmp.h>
71 # pragma message("PRIVATEBUILD is deprecated.\ 73 #endif
72 Use PNG_USER_PRIVATEBUILD instead.") 74
73 # define PNG_USER_PRIVATEBUILD PRIVATEBUILD 75 #ifdef PNG_CONVERT_tIME_SUPPORTED
74 #endif 76 /* Required for struct tm: */
75 #endif /* __STDC__ */ 77 # include <time.h>
76 78 #endif
77 #ifndef PNG_VERSION_INFO_ONLY 79
78 80 #endif /* PNG_BUILDING_SYMBOL_TABLE */
79 /* End of material added to libpng-1.2.8 */ 81
80 82 /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using
81 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble 83 * PNG_NO_CONST; this is no longer supported except for data declarations which
82 Restored at libpng-1.2.21 */ 84 * apparently still cause problems in 2011 on some compilers.
83 #if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \ 85 */
84 !defined(PNG_WARN_UNINITIALIZED_ROW) 86 #define PNG_CONST const /* backward compatibility only */
85 # define PNG_WARN_UNINITIALIZED_ROW 1 87
86 #endif 88 /* This controls optimization of the reading of 16 and 32 bit values
87 /* End of material added at libpng-1.2.19/1.2.21 */ 89 * from PNG files. It can be set on a per-app-file basis - it
88 90 * just changes whether a macro is used when the function is called.
89 /* This is the size of the compression buffer, and thus the size of 91 * The library builder sets the default; if read functions are not
90 * an IDAT chunk. Make this whatever size you feel is best for your 92 * built into the library the macro implementation is forced on.
91 * machine. One of these will be allocated per png_struct. When this 93 */
92 * is full, it writes the data to the disk, and does some other 94 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
93 * calculations. Making this an extremely small size will slow 95 # define PNG_USE_READ_MACROS
94 * the library down, but you may want to experiment to determine 96 #endif
95 * where it becomes significant, if you are concerned with memory 97 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
96 * usage. Note that zlib allocates at least 32Kb also. For readers, 98 # if PNG_DEFAULT_READ_MACROS
97 * this describes the size of the buffer available to read the data in. 99 # define PNG_USE_READ_MACROS
98 * Unless this gets smaller than the size of a row (compressed), 100 # endif
99 * it should not make much difference how big this is. 101 #endif
100 */ 102
101 103 /* COMPILER SPECIFIC OPTIONS.
102 #ifndef PNG_ZBUF_SIZE 104 *
103 # define PNG_ZBUF_SIZE 8192 105 * These options are provided so that a variety of difficult compilers
104 #endif 106 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
105 107 * below) but still have compiler specific implementations, others
106 /* Enable if you want a write-only libpng */ 108 * may be changed on a per-file basis when compiling against libpng.
107 109 */
108 #ifndef PNG_NO_READ_SUPPORTED 110
109 # define PNG_READ_SUPPORTED 111 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
110 #endif 112 * against legacy (pre ISOC90) compilers that did not understand function
111 113 * prototypes. It is not required for modern C compilers.
112 /* Enable if you want a read-only libpng */ 114 */
113 115 #ifndef PNGARG
114 #ifndef PNG_NO_WRITE_SUPPORTED 116 # define PNGARG(arglist) arglist
115 # define PNG_WRITE_SUPPORTED 117 #endif
116 #endif 118
117 119 /* Function calling conventions.
118 /* Enabled in 1.2.41. */ 120 * =============================
119 #ifdef PNG_ALLOW_BENIGN_ERRORS 121 * Normally it is not necessary to specify to the compiler how to call
120 # define png_benign_error png_warning 122 * a function - it just does it - however on x86 systems derived from
121 # define png_chunk_benign_error png_chunk_warning 123 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
122 #else 124 * and some others) there are multiple ways to call a function and the
123 # ifndef PNG_BENIGN_ERRORS_SUPPORTED 125 * default can be changed on the compiler command line. For this reason
124 # define png_benign_error png_error 126 * libpng specifies the calling convention of every exported function and
125 # define png_chunk_benign_error png_chunk_error 127 * every function called via a user supplied function pointer. This is
126 # endif 128 * done in this file by defining the following macros:
127 #endif 129 *
128 130 * PNGAPI Calling convention for exported functions.
129 /* Added in libpng-1.2.41 */ 131 * PNGCBAPI Calling convention for user provided (callback) functions.
130 #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED) 132 * PNGCAPI Calling convention used by the ANSI-C library (required
131 # define PNG_WARNINGS_SUPPORTED 133 * for longjmp callbacks and sometimes used internally to
132 #endif 134 * specify the calling convention for zlib).
133 135 *
134 #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED) 136 * These macros should never be overridden. If it is necessary to
135 # define PNG_ERROR_TEXT_SUPPORTED 137 * change calling convention in a private build this can be done
136 #endif 138 * by setting PNG_API_RULE (which defaults to 0) to one of the values
137 139 * below to select the correct 'API' variants.
138 #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED) 140 *
139 # define PNG_CHECK_cHRM_SUPPORTED 141 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
140 #endif 142 * This is correct in every known environment.
141 143 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
142 /* Enabled by default in 1.2.0. You can disable this if you don't need to 144 * the 'C' calling convention (from PNGCAPI) for
143 * support PNGs that are embedded in MNG datastreams 145 * callbacks (PNGCBAPI). This is no longer required
144 */ 146 * in any known environment - if it has to be used
145 #if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES) 147 * please post an explanation of the problem to the
146 # ifndef PNG_MNG_FEATURES_SUPPORTED 148 * libpng mailing list.
147 # define PNG_MNG_FEATURES_SUPPORTED 149 *
148 # endif 150 * These cases only differ if the operating system does not use the C
149 #endif 151 * calling convention, at present this just means the above cases
150 152 * (x86 DOS/Windows sytems) and, even then, this does not apply to
151 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED 153 * Cygwin running on those systems.
152 # ifndef PNG_FLOATING_POINT_SUPPORTED 154 *
153 # define PNG_FLOATING_POINT_SUPPORTED 155 * Note that the value must be defined in pnglibconf.h so that what
154 # endif 156 * the application uses to call the library matches the conventions
155 #endif 157 * set when building the library.
156 158 */
157 /* If you are running on a machine where you cannot allocate more 159
158 * than 64K of memory at once, uncomment this. While libpng will not 160 /* Symbol export
159 * normally need that much memory in a chunk (unless you load up a very 161 * =============
160 * large file), zlib needs to know how big of a chunk it can use, and 162 * When building a shared library it is almost always necessary to tell
161 * libpng thus makes sure to check any memory allocation to verify it 163 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
162 * will fit into memory. 164 * is used to mark the symbols. On some systems these symbols can be
163 #define PNG_MAX_MALLOC_64K 165 * extracted at link time and need no special processing by the compiler,
164 */ 166 * on other systems the symbols are flagged by the compiler and just
165 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) 167 * the declaration requires a special tag applied (unfortunately) in a
166 # define PNG_MAX_MALLOC_64K 168 * compiler dependent way. Some systems can do either.
167 #endif 169 *
168 170 * A small number of older systems also require a symbol from a DLL to
169 /* Special munging to support doing things the 'cygwin' way: 171 * be flagged to the program that calls it. This is a problem because
170 * 'Normal' png-on-win32 defines/defaults: 172 * we do not know in the header file included by application code that
171 * PNG_BUILD_DLL -- building dll 173 * the symbol will come from a shared library, as opposed to a statically
172 * PNG_USE_DLL -- building an application, linking to dll 174 * linked one. For this reason the application must tell us by setting
173 * (no define) -- building static library, or building an 175 * the magic flag PNG_USE_DLL to turn on the special processing before
174 * application and linking to the static lib 176 * it includes png.h.
175 * 'Cygwin' defines/defaults: 177 *
176 * PNG_BUILD_DLL -- (ignored) building the dll 178 * Four additional macros are used to make this happen:
177 * (no define) -- (ignored) building an application, linking to the dll 179 *
178 * PNG_STATIC -- (ignored) building the static lib, or building an 180 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
179 * application that links to the static lib. 181 * the build or imported if PNG_USE_DLL is set - compiler
180 * ALL_STATIC -- (ignored) building various static libs, or building an 182 * and system specific.
181 * application that links to the static libs. 183 *
182 * Thus, 184 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
183 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and 185 * 'type', compiler specific.
184 * this bit of #ifdefs will define the 'correct' config variables based on 186 *
185 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but 187 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
186 * unnecessary. 188 * make a symbol exported from the DLL. Not used in the
187 * 189 * public header files; see pngpriv.h for how it is used
188 * Also, the precedence order is: 190 * in the libpng build.
189 * ALL_STATIC (since we can't #undef something outside our namespace) 191 *
190 * PNG_BUILD_DLL 192 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
191 * PNG_STATIC 193 * from a DLL - used to define PNG_IMPEXP when
192 * (nothing) == PNG_USE_DLL 194 * PNG_USE_DLL is set.
193 * 195 */
194 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent 196
195 * of auto-import in binutils, we no longer need to worry about 197 /* System specific discovery.
196 * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore, 198 * ==========================
197 * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes 199 * This code is used at build time to find PNG_IMPEXP, the API settings
198 * to __declspec() stuff. However, we DO need to worry about 200 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
199 * PNG_BUILD_DLL and PNG_STATIC because those change some defaults 201 * import processing is possible. On Windows systems it also sets
200 * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed. 202 * compiler-specific macros to the values required to change the calling
201 */ 203 * conventions of the various functions.
202 #ifdef __CYGWIN__ 204 */
203 # ifdef ALL_STATIC 205 #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
204 # ifdef PNG_BUILD_DLL 206 defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
205 # undef PNG_BUILD_DLL 207 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
206 # endif 208 * MinGW on any architecture currently supported by Windows. Also includes
207 # ifdef PNG_USE_DLL 209 * Watcom builds but these need special treatment because they are not
208 # undef PNG_USE_DLL 210 * compatible with GCC or Visual C because of different calling conventions.
209 # endif 211 */
210 # ifdef PNG_DLL 212 # if PNG_API_RULE == 2
211 # undef PNG_DLL 213 /* If this line results in an error, either because __watcall is not
212 # endif 214 * understood or because of a redefine just below you cannot use *this*
213 # ifndef PNG_STATIC 215 * build of the library with the compiler you are using. *This* build was
214 # define PNG_STATIC 216 * build using Watcom and applications must also be built using Watcom!
217 */
218 # define PNGCAPI __watcall
219 # endif
220
221 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
222 # define PNGCAPI __cdecl
223 # if PNG_API_RULE == 1
224 /* If this line results in an error __stdcall is not understood and
225 * PNG_API_RULE should not have been set to '1'.
226 */
227 # define PNGAPI __stdcall
215 # endif 228 # endif
216 # else 229 # else
217 # ifdef PNG_BUILD_DLL 230 /* An older compiler, or one not detected (erroneously) above,
218 # ifdef PNG_STATIC 231 * if necessary override on the command line to get the correct
219 # undef PNG_STATIC 232 * variants for the compiler.
233 */
234 # ifndef PNGCAPI
235 # define PNGCAPI _cdecl
236 # endif
237 # if PNG_API_RULE == 1 && !defined(PNGAPI)
238 # define PNGAPI _stdcall
239 # endif
240 # endif /* compiler/api */
241
242 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
243
244 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
245 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
246 # endif
247
248 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
249 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
250 /* older Borland and MSC
251 * compilers used '__export' and required this to be after
252 * the type.
253 */
254 # ifndef PNG_EXPORT_TYPE
255 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
256 # endif
257 # define PNG_DLL_EXPORT __export
258 # else /* newer compiler */
259 # define PNG_DLL_EXPORT __declspec(dllexport)
260 # ifndef PNG_DLL_IMPORT
261 # define PNG_DLL_IMPORT __declspec(dllimport)
262 # endif
263 # endif /* compiler */
264
265 #else /* !Windows */
266 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
267 # define PNGAPI _System
268 # else /* !Windows/x86 && !OS/2 */
269 /* Use the defaults, or define PNG*API on the command line (but
270 * this will have to be done for every compile!)
271 */
272 # endif /* other system, !OS/2 */
273 #endif /* !Windows/x86 */
274
275 /* Now do all the defaulting . */
276 #ifndef PNGCAPI
277 # define PNGCAPI
278 #endif
279 #ifndef PNGCBAPI
280 # define PNGCBAPI PNGCAPI
281 #endif
282 #ifndef PNGAPI
283 # define PNGAPI PNGCAPI
284 #endif
285
286 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
287 * then in an internal header file when building the library, otherwise (when
288 * using the library) it is set here.
289 */
290 #ifndef PNG_IMPEXP
291 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
292 /* This forces use of a DLL, disallowing static linking */
293 # define PNG_IMPEXP PNG_DLL_IMPORT
294 # endif
295
296 # ifndef PNG_IMPEXP
297 # define PNG_IMPEXP
298 # endif
299 #endif
300
301 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
302 * 'attributes' as a storage class - the attributes go at the start of the
303 * function definition, and attributes are always appended regardless of the
304 * compiler. This considerably simplifies these macros but may cause problems
305 * if any compilers both need function attributes and fail to handle them as
306 * a storage class (this is unlikely.)
307 */
308 #ifndef PNG_FUNCTION
309 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
310 #endif
311
312 #ifndef PNG_EXPORT_TYPE
313 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
314 #endif
315
316 /* The ordinal value is only relevant when preprocessing png.h for symbol
317 * table entries, so we discard it here. See the .dfn files in the
318 * scripts directory.
319 */
320 #ifndef PNG_EXPORTA
321
322 # define PNG_EXPORTA(ordinal, type, name, args, attributes)\
323 PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
324 extern attributes)
325 #endif
326
327 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
328 * so make something non-empty to satisfy the requirement:
329 */
330 #define PNG_EMPTY /*empty list*/
331
332 #define PNG_EXPORT(ordinal, type, name, args)\
333 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
334
335 /* Use PNG_REMOVED to comment out a removed interface. */
336 #ifndef PNG_REMOVED
337 # define PNG_REMOVED(ordinal, type, name, args, attributes)
338 #endif
339
340 #ifndef PNG_CALLBACK
341 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
342 #endif
343
344 /* Support for compiler specific function attributes. These are used
345 * so that where compiler support is available incorrect use of API
346 * functions in png.h will generate compiler warnings.
347 *
348 * Added at libpng-1.2.41.
349 */
350
351 #ifndef PNG_NO_PEDANTIC_WARNINGS
352 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
353 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
354 # endif
355 #endif
356
357 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
358 /* Support for compiler specific function attributes. These are used
359 * so that where compiler support is available, incorrect use of API
360 * functions in png.h will generate compiler warnings. Added at libpng
361 * version 1.2.41. Disabling these removes the warnings but may also produce
362 * less efficient code.
363 */
364 # if defined(__GNUC__)
365 # ifndef PNG_USE_RESULT
366 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
367 # endif
368 # ifndef PNG_NORETURN
369 # define PNG_NORETURN __attribute__((__noreturn__))
370 # endif
371 # if __GNUC__ >= 3
372 # ifndef PNG_ALLOCATED
373 # define PNG_ALLOCATED __attribute__((__malloc__))
220 # endif 374 # endif
221 # ifdef PNG_USE_DLL 375 # ifndef PNG_DEPRECATED
222 # undef PNG_USE_DLL 376 # define PNG_DEPRECATED __attribute__((__deprecated__))
223 # endif 377 # endif
224 # ifndef PNG_DLL 378 # ifndef PNG_PRIVATE
225 # define PNG_DLL 379 # if 0 /* Doesn't work so we use deprecated instead*/
226 # endif 380 # define PNG_PRIVATE \
227 # else 381 __attribute__((warning("This function is not exported by libpng.")))
228 # ifdef PNG_STATIC 382 # else
229 # ifdef PNG_USE_DLL 383 # define PNG_PRIVATE \
230 # undef PNG_USE_DLL 384 __attribute__((__deprecated__))
231 # endif
232 # ifdef PNG_DLL
233 # undef PNG_DLL
234 # endif
235 # else
236 # ifndef PNG_USE_DLL
237 # define PNG_USE_DLL
238 # endif
239 # ifndef PNG_DLL
240 # define PNG_DLL
241 # endif 385 # endif
242 # endif 386 # endif
243 # endif 387 # if ((__GNUC__ != 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
244 # endif 388 # ifndef PNG_RESTRICT
245 #endif 389 # define PNG_RESTRICT __restrict
246 390 # endif
247 /* This protects us against compilers that run on a windowing system 391 # endif /* __GNUC__ == 3.0 */
248 * and thus don't have or would rather us not use the stdio types: 392 # endif /* __GNUC__ >= 3 */
249 * stdin, stdout, and stderr. The only one currently used is stderr 393
250 * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will 394 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
251 * prevent these from being compiled and used. #defining PNG_NO_STDIO 395 # ifndef PNG_USE_RESULT
252 * will also prevent these, plus will prevent the entire set of stdio 396 # define PNG_USE_RESULT /* not supported */
253 * macros and functions (FILE *, printf, etc.) from being compiled and used, 397 # endif
254 * unless (PNG_DEBUG > 0) has been #defined. 398 # ifndef PNG_NORETURN
255 * 399 # define PNG_NORETURN __declspec(noreturn)
256 * #define PNG_NO_CONSOLE_IO 400 # endif
257 * #define PNG_NO_STDIO 401 # ifndef PNG_ALLOCATED
258 */ 402 # if (_MSC_VER >= 1400)
259 403 # define PNG_ALLOCATED __declspec(restrict)
260 #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
261 # define PNG_STDIO_SUPPORTED
262 #endif
263
264 #ifdef _WIN32_WCE
265 # include <windows.h>
266 /* Console I/O functions are not supported on WindowsCE */
267 # define PNG_NO_CONSOLE_IO
268 /* abort() may not be supported on some/all Windows CE platforms */
269 # define PNG_ABORT() exit(-1)
270 # ifdef PNG_DEBUG
271 # undef PNG_DEBUG
272 # endif
273 #endif
274
275 #ifdef PNG_BUILD_DLL
276 # ifndef PNG_CONSOLE_IO_SUPPORTED
277 # ifndef PNG_NO_CONSOLE_IO
278 # define PNG_NO_CONSOLE_IO
279 # endif
280 # endif
281 #endif
282
283 # ifdef PNG_NO_STDIO
284 # ifndef PNG_NO_CONSOLE_IO
285 # define PNG_NO_CONSOLE_IO
286 # endif
287 # ifdef PNG_DEBUG
288 # if (PNG_DEBUG > 0)
289 # include <stdio.h>
290 # endif 404 # endif
291 # endif 405 # endif
292 # else 406 # ifndef PNG_DEPRECATED
293 # ifndef _WIN32_WCE 407 # define PNG_DEPRECATED __declspec(deprecated)
294 /* "stdio.h" functions are not supported on WindowsCE */ 408 # endif
295 # include <stdio.h> 409 # ifndef PNG_PRIVATE
296 # endif 410 # define PNG_PRIVATE __declspec(deprecated)
297 # endif 411 # endif
298 412 # ifndef PNG_RESTRICT
299 #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED) 413 # if (_MSC_VER >= 1400)
300 # define PNG_CONSOLE_IO_SUPPORTED 414 # define PNG_RESTRICT __restrict
301 #endif
302
303 /* This macro protects us against machines that don't have function
304 * prototypes (ie K&R style headers). If your compiler does not handle
305 * function prototypes, define this macro and use the included ansi2knr.
306 * I've always been able to use _NO_PROTO as the indicator, but you may
307 * need to drag the empty declaration out in front of here, or change the
308 * ifdef to suit your own needs.
309 */
310 #ifndef PNGARG
311
312 #ifdef OF /* zlib prototype munger */
313 # define PNGARG(arglist) OF(arglist)
314 #else
315
316 #ifdef _NO_PROTO
317 # define PNGARG(arglist) ()
318 # ifndef PNG_TYPECAST_NULL
319 # define PNG_TYPECAST_NULL
320 # endif
321 #else
322 # define PNGARG(arglist) arglist
323 #endif /* _NO_PROTO */
324
325
326 #endif /* OF */
327
328 #endif /* PNGARG */
329
330 /* Try to determine if we are compiling on a Mac. Note that testing for
331 * just __MWERKS__ is not good enough, because the Codewarrior is now used
332 * on non-Mac platforms.
333 */
334 #ifndef MACOS
335 # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
336 defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
337 # define MACOS
338 # endif
339 #endif
340
341 /* enough people need this for various reasons to include it here */
342 #if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE)
343 # include <sys/types.h>
344 #endif
345
346 #if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
347 # define PNG_SETJMP_SUPPORTED
348 #endif
349
350 #ifdef PNG_SETJMP_SUPPORTED
351 /* This is an attempt to force a single setjmp behaviour on Linux. If
352 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
353 *
354 * You can bypass this test if you know that your application uses exactly
355 * the same setjmp.h that was included when libpng was built. Only define
356 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
357 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
358 * while building a separate libpng library for general use.
359 */
360
361 # ifndef PNG_SKIP_SETJMP_CHECK
362 # ifdef __linux__
363 # ifdef _BSD_SOURCE
364 # define PNG_SAVE_BSD_SOURCE
365 # undef _BSD_SOURCE
366 # endif 415 # endif
367 # ifdef _SETJMP_H 416 # endif
368 /* If you encounter a compiler error here, see the explanation 417
369 * near the end of INSTALL. 418 # elif defined(__WATCOMC__)
370 */ 419 # ifndef PNG_RESTRICT
371 __pngconf.h__ in libpng already includes setjmp.h; 420 # define PNG_RESTRICT __restrict
372 __dont__ include it again.; 421 # endif
373 # endif 422 # endif /* _MSC_VER */
374 # endif /* __linux__ */
375 # endif /* PNG_SKIP_SETJMP_CHECK */
376
377 /* include setjmp.h for error handling */
378 # include <setjmp.h>
379
380 # ifdef __linux__
381 # ifdef PNG_SAVE_BSD_SOURCE
382 # ifndef _BSD_SOURCE
383 # define _BSD_SOURCE
384 # endif
385 # undef PNG_SAVE_BSD_SOURCE
386 # endif
387 # endif /* __linux__ */
388 #endif /* PNG_SETJMP_SUPPORTED */
389
390 #ifdef BSD
391 # include <strings.h>
392 #else
393 # include <string.h>
394 #endif
395
396 /* Other defines for things like memory and the like can go here. */
397 #ifdef PNG_INTERNAL
398
399 #include <stdlib.h>
400
401 /* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which
402 * aren't usually used outside the library (as far as I know), so it is
403 * debatable if they should be exported at all. In the future, when it is
404 * possible to have run-time registry of chunk-handling functions, some of
405 * these will be made available again.
406 #define PNG_EXTERN extern
407 */
408 #define PNG_EXTERN
409
410 /* Other defines specific to compilers can go here. Try to keep
411 * them inside an appropriate ifdef/endif pair for portability.
412 */
413
414 #ifdef PNG_FLOATING_POINT_SUPPORTED
415 # ifdef MACOS
416 /* We need to check that <math.h> hasn't already been included earlier
417 * as it seems it doesn't agree with <fp.h>, yet we should really use
418 * <fp.h> if possible.
419 */
420 # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
421 # include <fp.h>
422 # endif
423 # else
424 # include <math.h>
425 # endif
426 # if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
427 /* Amiga SAS/C: We must include builtin FPU functions when compiling using
428 * MATH=68881
429 */
430 # include <m68881.h>
431 # endif
432 #endif
433
434 /* Codewarrior on NT has linking problems without this. */
435 #if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
436 # define PNG_ALWAYS_EXTERN
437 #endif
438
439 /* This provides the non-ANSI (far) memory allocation routines. */
440 #if defined(__TURBOC__) && defined(__MSDOS__)
441 # include <mem.h>
442 # include <alloc.h>
443 #endif
444
445 /* I have no idea why is this necessary... */
446 #if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
447 defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
448 # include <malloc.h>
449 #endif
450
451 /* This controls how fine the dithering gets. As this allocates
452 * a largish chunk of memory (32K), those who are not as concerned
453 * with dithering quality can decrease some or all of these.
454 */
455 #ifndef PNG_DITHER_RED_BITS
456 # define PNG_DITHER_RED_BITS 5
457 #endif
458 #ifndef PNG_DITHER_GREEN_BITS
459 # define PNG_DITHER_GREEN_BITS 5
460 #endif
461 #ifndef PNG_DITHER_BLUE_BITS
462 # define PNG_DITHER_BLUE_BITS 5
463 #endif
464
465 /* This controls how fine the gamma correction becomes when you
466 * are only interested in 8 bits anyway. Increasing this value
467 * results in more memory being used, and more pow() functions
468 * being called to fill in the gamma tables. Don't set this value
469 * less then 8, and even that may not work (I haven't tested it).
470 */
471
472 #ifndef PNG_MAX_GAMMA_8
473 # define PNG_MAX_GAMMA_8 11
474 #endif
475
476 /* This controls how much a difference in gamma we can tolerate before
477 * we actually start doing gamma conversion.
478 */
479 #ifndef PNG_GAMMA_THRESHOLD
480 # define PNG_GAMMA_THRESHOLD 0.05
481 #endif
482
483 #endif /* PNG_INTERNAL */
484
485 /* The following uses const char * instead of char * for error
486 * and warning message functions, so some compilers won't complain.
487 * If you do not want to use const, define PNG_NO_CONST here.
488 */
489
490 #ifndef PNG_NO_CONST
491 # define PNG_CONST const
492 #else
493 # define PNG_CONST
494 #endif
495
496 /* The following defines give you the ability to remove code from the
497 * library that you will not be using. I wish I could figure out how to
498 * automate this, but I can't do that without making it seriously hard
499 * on the users. So if you are not using an ability, change the #define
500 * to and #undef, and that part of the library will not be compiled. If
501 * your linker can't find a function, you may want to make sure the
502 * ability is defined here. Some of these depend upon some others being
503 * defined. I haven't figured out all the interactions here, so you may
504 * have to experiment awhile to get everything to compile. If you are
505 * creating or using a shared library, you probably shouldn't touch this,
506 * as it will affect the size of the structures, and this will cause bad
507 * things to happen if the library and/or application ever change.
508 */
509
510 /* Any features you will not be using can be undef'ed here */
511
512 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
513 * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
514 * on the compile line, then pick and choose which ones to define without
515 * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
516 * if you only want to have a png-compliant reader/writer but don't need
517 * any of the extra transformations. This saves about 80 kbytes in a
518 * typical installation of the library. (PNG_NO_* form added in version
519 * 1.0.1c, for consistency)
520 */
521
522 /* The size of the png_text structure changed in libpng-1.0.6 when
523 * iTXt support was added. iTXt support was turned off by default through
524 * libpng-1.2.x, to support old apps that malloc the png_text structure
525 * instead of calling png_set_text() and letting libpng malloc it. It
526 * will be turned on by default in libpng-1.4.0.
527 */
528
529 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
530 # ifndef PNG_NO_iTXt_SUPPORTED
531 # define PNG_NO_iTXt_SUPPORTED
532 # endif
533 # ifndef PNG_NO_READ_iTXt
534 # define PNG_NO_READ_iTXt
535 # endif
536 # ifndef PNG_NO_WRITE_iTXt
537 # define PNG_NO_WRITE_iTXt
538 # endif
539 #endif
540
541 #if !defined(PNG_NO_iTXt_SUPPORTED)
542 # if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt)
543 # define PNG_READ_iTXt
544 # endif
545 # if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt)
546 # define PNG_WRITE_iTXt
547 # endif
548 #endif
549
550 /* The following support, added after version 1.0.0, can be turned off here en
551 * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility
552 * with old applications that require the length of png_struct and png_info
553 * to remain unchanged.
554 */
555
556 #ifdef PNG_LEGACY_SUPPORTED
557 # define PNG_NO_FREE_ME
558 # define PNG_NO_READ_UNKNOWN_CHUNKS
559 # define PNG_NO_WRITE_UNKNOWN_CHUNKS
560 # define PNG_NO_HANDLE_AS_UNKNOWN
561 # define PNG_NO_READ_USER_CHUNKS
562 # define PNG_NO_READ_iCCP
563 # define PNG_NO_WRITE_iCCP
564 # define PNG_NO_READ_iTXt
565 # define PNG_NO_WRITE_iTXt
566 # define PNG_NO_READ_sCAL
567 # define PNG_NO_WRITE_sCAL
568 # define PNG_NO_READ_sPLT
569 # define PNG_NO_WRITE_sPLT
570 # define PNG_NO_INFO_IMAGE
571 # define PNG_NO_READ_RGB_TO_GRAY
572 # define PNG_NO_READ_USER_TRANSFORM
573 # define PNG_NO_WRITE_USER_TRANSFORM
574 # define PNG_NO_USER_MEM
575 # define PNG_NO_READ_EMPTY_PLTE
576 # define PNG_NO_MNG_FEATURES
577 # define PNG_NO_FIXED_POINT_SUPPORTED
578 #endif
579
580 /* Ignore attempt to turn off both floating and fixed point support */
581 #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
582 !defined(PNG_NO_FIXED_POINT_SUPPORTED)
583 # define PNG_FIXED_POINT_SUPPORTED
584 #endif
585
586 #ifndef PNG_NO_FREE_ME
587 # define PNG_FREE_ME_SUPPORTED
588 #endif
589
590 #ifdef PNG_READ_SUPPORTED
591
592 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
593 !defined(PNG_NO_READ_TRANSFORMS)
594 # define PNG_READ_TRANSFORMS_SUPPORTED
595 #endif
596
597 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
598 # ifndef PNG_NO_READ_EXPAND
599 # define PNG_READ_EXPAND_SUPPORTED
600 # endif
601 # ifndef PNG_NO_READ_SHIFT
602 # define PNG_READ_SHIFT_SUPPORTED
603 # endif
604 # ifndef PNG_NO_READ_PACK
605 # define PNG_READ_PACK_SUPPORTED
606 # endif
607 # ifndef PNG_NO_READ_BGR
608 # define PNG_READ_BGR_SUPPORTED
609 # endif
610 # ifndef PNG_NO_READ_SWAP
611 # define PNG_READ_SWAP_SUPPORTED
612 # endif
613 # ifndef PNG_NO_READ_PACKSWAP
614 # define PNG_READ_PACKSWAP_SUPPORTED
615 # endif
616 # ifndef PNG_NO_READ_INVERT
617 # define PNG_READ_INVERT_SUPPORTED
618 # endif
619 # ifndef PNG_NO_READ_DITHER
620 # define PNG_READ_DITHER_SUPPORTED
621 # endif
622 # ifndef PNG_NO_READ_BACKGROUND
623 # define PNG_READ_BACKGROUND_SUPPORTED
624 # endif
625 # ifndef PNG_NO_READ_16_TO_8
626 # define PNG_READ_16_TO_8_SUPPORTED
627 # endif
628 # ifndef PNG_NO_READ_FILLER
629 # define PNG_READ_FILLER_SUPPORTED
630 # endif
631 # ifndef PNG_NO_READ_GAMMA
632 # define PNG_READ_GAMMA_SUPPORTED
633 # endif
634 # ifndef PNG_NO_READ_GRAY_TO_RGB
635 # define PNG_READ_GRAY_TO_RGB_SUPPORTED
636 # endif
637 # ifndef PNG_NO_READ_SWAP_ALPHA
638 # define PNG_READ_SWAP_ALPHA_SUPPORTED
639 # endif
640 # ifndef PNG_NO_READ_INVERT_ALPHA
641 # define PNG_READ_INVERT_ALPHA_SUPPORTED
642 # endif
643 # ifndef PNG_NO_READ_STRIP_ALPHA
644 # define PNG_READ_STRIP_ALPHA_SUPPORTED
645 # endif
646 # ifndef PNG_NO_READ_USER_TRANSFORM
647 # define PNG_READ_USER_TRANSFORM_SUPPORTED
648 # endif
649 # ifndef PNG_NO_READ_RGB_TO_GRAY
650 # define PNG_READ_RGB_TO_GRAY_SUPPORTED
651 # endif
652 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
653
654 /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
655 #if !defined(PNG_NO_PROGRESSIVE_READ) && \
656 !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
657 # define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
658 #endif /* about interlacing capability! You'll */
659 /* still have interlacing unless you change the following define: */
660 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
661
662 /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
663 #if !defined(PNG_NO_SEQUENTIAL_READ) && \
664 !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
665 !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
666 # define PNG_SEQUENTIAL_READ_SUPPORTED
667 #endif
668
669 #define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */
670
671 #ifndef PNG_NO_READ_COMPOSITE_NODIV
672 # ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
673 # define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
674 # endif
675 #endif
676
677 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
678 /* Deprecated, will be removed from version 2.0.0.
679 Use PNG_MNG_FEATURES_SUPPORTED instead. */
680 #ifndef PNG_NO_READ_EMPTY_PLTE
681 # define PNG_READ_EMPTY_PLTE_SUPPORTED
682 #endif
683 #endif
684
685 #endif /* PNG_READ_SUPPORTED */
686
687 #ifdef PNG_WRITE_SUPPORTED
688
689 # if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
690 !defined(PNG_NO_WRITE_TRANSFORMS)
691 # define PNG_WRITE_TRANSFORMS_SUPPORTED
692 #endif
693
694 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
695 # ifndef PNG_NO_WRITE_SHIFT
696 # define PNG_WRITE_SHIFT_SUPPORTED
697 # endif
698 # ifndef PNG_NO_WRITE_PACK
699 # define PNG_WRITE_PACK_SUPPORTED
700 # endif
701 # ifndef PNG_NO_WRITE_BGR
702 # define PNG_WRITE_BGR_SUPPORTED
703 # endif
704 # ifndef PNG_NO_WRITE_SWAP
705 # define PNG_WRITE_SWAP_SUPPORTED
706 # endif
707 # ifndef PNG_NO_WRITE_PACKSWAP
708 # define PNG_WRITE_PACKSWAP_SUPPORTED
709 # endif
710 # ifndef PNG_NO_WRITE_INVERT
711 # define PNG_WRITE_INVERT_SUPPORTED
712 # endif
713 # ifndef PNG_NO_WRITE_FILLER
714 # define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
715 # endif
716 # ifndef PNG_NO_WRITE_SWAP_ALPHA
717 # define PNG_WRITE_SWAP_ALPHA_SUPPORTED
718 # endif
719 #ifndef PNG_1_0_X
720 # ifndef PNG_NO_WRITE_INVERT_ALPHA
721 # define PNG_WRITE_INVERT_ALPHA_SUPPORTED
722 # endif
723 #endif
724 # ifndef PNG_NO_WRITE_USER_TRANSFORM
725 # define PNG_WRITE_USER_TRANSFORM_SUPPORTED
726 # endif
727 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
728
729 #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
730 !defined(PNG_WRITE_INTERLACING_SUPPORTED)
731 #define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant
732 encoders, but can cause trouble
733 if left undefined */
734 #endif
735
736 #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
737 !defined(PNG_WRITE_WEIGHTED_FILTER) && \
738 defined(PNG_FLOATING_POINT_SUPPORTED)
739 # define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
740 #endif
741
742 #ifndef PNG_NO_WRITE_FLUSH
743 # define PNG_WRITE_FLUSH_SUPPORTED
744 #endif
745
746 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
747 /* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */
748 #ifndef PNG_NO_WRITE_EMPTY_PLTE
749 # define PNG_WRITE_EMPTY_PLTE_SUPPORTED
750 #endif
751 #endif
752
753 #endif /* PNG_WRITE_SUPPORTED */
754
755 #ifndef PNG_1_0_X
756 # ifndef PNG_NO_ERROR_NUMBERS
757 # define PNG_ERROR_NUMBERS_SUPPORTED
758 # endif
759 #endif /* PNG_1_0_X */
760
761 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
762 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
763 # ifndef PNG_NO_USER_TRANSFORM_PTR
764 # define PNG_USER_TRANSFORM_PTR_SUPPORTED
765 # endif
766 #endif
767
768 #ifndef PNG_NO_STDIO
769 # define PNG_TIME_RFC1123_SUPPORTED
770 #endif
771
772 /* This adds extra functions in pngget.c for accessing data from the
773 * info pointer (added in version 0.99)
774 * png_get_image_width()
775 * png_get_image_height()
776 * png_get_bit_depth()
777 * png_get_color_type()
778 * png_get_compression_type()
779 * png_get_filter_type()
780 * png_get_interlace_type()
781 * png_get_pixel_aspect_ratio()
782 * png_get_pixels_per_meter()
783 * png_get_x_offset_pixels()
784 * png_get_y_offset_pixels()
785 * png_get_x_offset_microns()
786 * png_get_y_offset_microns()
787 */
788 #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
789 # define PNG_EASY_ACCESS_SUPPORTED
790 #endif
791
792 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
793 * and removed from version 1.2.20. The following will be removed
794 * from libpng-1.4.0
795 */
796
797 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE)
798 # ifndef PNG_OPTIMIZED_CODE_SUPPORTED
799 # define PNG_OPTIMIZED_CODE_SUPPORTED
800 # endif
801 #endif
802
803 #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
804 # ifndef PNG_ASSEMBLER_CODE_SUPPORTED
805 # define PNG_ASSEMBLER_CODE_SUPPORTED
806 # endif
807
808 # if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4)
809 /* work around 64-bit gcc compiler bugs in gcc-3.x */
810 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
811 # define PNG_NO_MMX_CODE
812 # endif
813 # endif
814
815 # ifdef __APPLE__
816 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
817 # define PNG_NO_MMX_CODE
818 # endif
819 # endif
820
821 # if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh))
822 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
823 # define PNG_NO_MMX_CODE
824 # endif
825 # endif
826
827 # if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
828 # define PNG_MMX_CODE_SUPPORTED
829 # endif
830
831 #endif
832 /* end of obsolete code to be removed from libpng-1.4.0 */
833
834 /* Added at libpng-1.2.0 */
835 #ifndef PNG_1_0_X
836 #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
837 # define PNG_USER_MEM_SUPPORTED
838 #endif
839 #endif /* PNG_1_0_X */
840
841 /* Added at libpng-1.2.6 */
842 #ifndef PNG_1_0_X
843 # ifndef PNG_SET_USER_LIMITS_SUPPORTED
844 # ifndef PNG_NO_SET_USER_LIMITS
845 # define PNG_SET_USER_LIMITS_SUPPORTED
846 # endif
847 # endif
848 #endif /* PNG_1_0_X */
849
850 /* Added at libpng-1.0.53 and 1.2.43 */
851 #ifndef PNG_USER_LIMITS_SUPPORTED
852 # ifndef PNG_NO_USER_LIMITS
853 # define PNG_USER_LIMITS_SUPPORTED
854 # endif
855 #endif
856
857 /* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter
858 * how large, set these limits to 0x7fffffffL
859 */
860 #ifndef PNG_USER_WIDTH_MAX
861 # define PNG_USER_WIDTH_MAX 1000000L
862 #endif
863 #ifndef PNG_USER_HEIGHT_MAX
864 # define PNG_USER_HEIGHT_MAX 1000000L
865 #endif
866
867 /* Added at libpng-1.2.43. To accept all valid PNGs no matter
868 * how large, set these two limits to 0.
869 */
870 #ifndef PNG_USER_CHUNK_CACHE_MAX
871 # define PNG_USER_CHUNK_CACHE_MAX 0
872 #endif
873
874 /* Added at libpng-1.2.43 */
875 #ifndef PNG_USER_CHUNK_MALLOC_MAX
876 # define PNG_USER_CHUNK_MALLOC_MAX 0
877 #endif
878
879 #ifndef PNG_LITERAL_SHARP
880 # define PNG_LITERAL_SHARP 0x23
881 #endif
882 #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
883 # define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
884 #endif
885 #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
886 # define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
887 #endif
888
889 /* Added at libpng-1.2.34 */
890 #ifndef PNG_STRING_NEWLINE
891 #define PNG_STRING_NEWLINE "\n"
892 #endif
893
894 /* These are currently experimental features, define them if you want */
895
896 /* very little testing */
897 /*
898 #ifdef PNG_READ_SUPPORTED
899 # ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
900 # define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
901 # endif
902 #endif
903 */
904
905 /* This is only for PowerPC big-endian and 680x0 systems */
906 /* some testing */
907 /*
908 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
909 # define PNG_READ_BIG_ENDIAN_SUPPORTED
910 #endif
911 */
912
913 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
914 /*
915 #define PNG_NO_POINTER_INDEXING
916 */
917
918 #if !defined(PNG_NO_POINTER_INDEXING) && \
919 !defined(PNG_POINTER_INDEXING_SUPPORTED)
920 # define PNG_POINTER_INDEXING_SUPPORTED
921 #endif
922
923 /* These functions are turned off by default, as they will be phased out. */
924 /*
925 #define PNG_USELESS_TESTS_SUPPORTED
926 #define PNG_CORRECT_PALETTE_SUPPORTED
927 */
928
929 /* Any chunks you are not interested in, you can undef here. The
930 * ones that allocate memory may be expecially important (hIST,
931 * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
932 * a bit smaller.
933 */
934
935 #if defined(PNG_READ_SUPPORTED) && \
936 !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
937 !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
938 # define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
939 #endif
940
941 #if defined(PNG_WRITE_SUPPORTED) && \
942 !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
943 !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
944 # define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
945 #endif
946
947 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
948
949 #ifdef PNG_NO_READ_TEXT
950 # define PNG_NO_READ_iTXt
951 # define PNG_NO_READ_tEXt
952 # define PNG_NO_READ_zTXt
953 #endif
954 #ifndef PNG_NO_READ_bKGD
955 # define PNG_READ_bKGD_SUPPORTED
956 # define PNG_bKGD_SUPPORTED
957 #endif
958 #ifndef PNG_NO_READ_cHRM
959 # define PNG_READ_cHRM_SUPPORTED
960 # define PNG_cHRM_SUPPORTED
961 #endif
962 #ifndef PNG_NO_READ_gAMA
963 # define PNG_READ_gAMA_SUPPORTED
964 # define PNG_gAMA_SUPPORTED
965 #endif
966 #ifndef PNG_NO_READ_hIST
967 # define PNG_READ_hIST_SUPPORTED
968 # define PNG_hIST_SUPPORTED
969 #endif
970 #ifndef PNG_NO_READ_iCCP
971 # define PNG_READ_iCCP_SUPPORTED
972 # define PNG_iCCP_SUPPORTED
973 #endif
974 #ifndef PNG_NO_READ_iTXt
975 # ifndef PNG_READ_iTXt_SUPPORTED
976 # define PNG_READ_iTXt_SUPPORTED
977 # endif
978 # ifndef PNG_iTXt_SUPPORTED
979 # define PNG_iTXt_SUPPORTED
980 # endif
981 #endif
982 #ifndef PNG_NO_READ_oFFs
983 # define PNG_READ_oFFs_SUPPORTED
984 # define PNG_oFFs_SUPPORTED
985 #endif
986 #ifndef PNG_NO_READ_pCAL
987 # define PNG_READ_pCAL_SUPPORTED
988 # define PNG_pCAL_SUPPORTED
989 #endif
990 #ifndef PNG_NO_READ_sCAL
991 # define PNG_READ_sCAL_SUPPORTED
992 # define PNG_sCAL_SUPPORTED
993 #endif
994 #ifndef PNG_NO_READ_pHYs
995 # define PNG_READ_pHYs_SUPPORTED
996 # define PNG_pHYs_SUPPORTED
997 #endif
998 #ifndef PNG_NO_READ_sBIT
999 # define PNG_READ_sBIT_SUPPORTED
1000 # define PNG_sBIT_SUPPORTED
1001 #endif
1002 #ifndef PNG_NO_READ_sPLT
1003 # define PNG_READ_sPLT_SUPPORTED
1004 # define PNG_sPLT_SUPPORTED
1005 #endif
1006 #ifndef PNG_NO_READ_sRGB
1007 # define PNG_READ_sRGB_SUPPORTED
1008 # define PNG_sRGB_SUPPORTED
1009 #endif
1010 #ifndef PNG_NO_READ_tEXt
1011 # define PNG_READ_tEXt_SUPPORTED
1012 # define PNG_tEXt_SUPPORTED
1013 #endif
1014 #ifndef PNG_NO_READ_tIME
1015 # define PNG_READ_tIME_SUPPORTED
1016 # define PNG_tIME_SUPPORTED
1017 #endif
1018 #ifndef PNG_NO_READ_tRNS
1019 # define PNG_READ_tRNS_SUPPORTED
1020 # define PNG_tRNS_SUPPORTED
1021 #endif
1022 #ifndef PNG_NO_READ_zTXt
1023 # define PNG_READ_zTXt_SUPPORTED
1024 # define PNG_zTXt_SUPPORTED
1025 #endif
1026 #ifndef PNG_NO_READ_OPT_PLTE
1027 # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
1028 #endif /* optional PLTE chunk in RGB and RGBA images */
1029 #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
1030 defined(PNG_READ_zTXt_SUPPORTED)
1031 # define PNG_READ_TEXT_SUPPORTED
1032 # define PNG_TEXT_SUPPORTED
1033 #endif
1034
1035 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
1036
1037 #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
1038 # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1039 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1040 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1041 # endif
1042 #endif
1043 #if !defined(PNG_NO_READ_USER_CHUNKS) && \
1044 defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
1045 # define PNG_READ_USER_CHUNKS_SUPPORTED
1046 # define PNG_USER_CHUNKS_SUPPORTED
1047 # ifdef PNG_NO_READ_UNKNOWN_CHUNKS
1048 # undef PNG_NO_READ_UNKNOWN_CHUNKS
1049 # endif
1050 # ifdef PNG_NO_HANDLE_AS_UNKNOWN
1051 # undef PNG_NO_HANDLE_AS_UNKNOWN
1052 # endif
1053 #endif
1054
1055 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1056 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1057 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1058 # endif
1059 #endif
1060
1061 #ifdef PNG_WRITE_SUPPORTED
1062 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
1063
1064 #ifdef PNG_NO_WRITE_TEXT
1065 # define PNG_NO_WRITE_iTXt
1066 # define PNG_NO_WRITE_tEXt
1067 # define PNG_NO_WRITE_zTXt
1068 #endif
1069 #ifndef PNG_NO_WRITE_bKGD
1070 # define PNG_WRITE_bKGD_SUPPORTED
1071 # ifndef PNG_bKGD_SUPPORTED
1072 # define PNG_bKGD_SUPPORTED
1073 # endif
1074 #endif
1075 #ifndef PNG_NO_WRITE_cHRM
1076 # define PNG_WRITE_cHRM_SUPPORTED
1077 # ifndef PNG_cHRM_SUPPORTED
1078 # define PNG_cHRM_SUPPORTED
1079 # endif
1080 #endif
1081 #ifndef PNG_NO_WRITE_gAMA
1082 # define PNG_WRITE_gAMA_SUPPORTED
1083 # ifndef PNG_gAMA_SUPPORTED
1084 # define PNG_gAMA_SUPPORTED
1085 # endif
1086 #endif
1087 #ifndef PNG_NO_WRITE_hIST
1088 # define PNG_WRITE_hIST_SUPPORTED
1089 # ifndef PNG_hIST_SUPPORTED
1090 # define PNG_hIST_SUPPORTED
1091 # endif
1092 #endif
1093 #ifndef PNG_NO_WRITE_iCCP
1094 # define PNG_WRITE_iCCP_SUPPORTED
1095 # ifndef PNG_iCCP_SUPPORTED
1096 # define PNG_iCCP_SUPPORTED
1097 # endif
1098 #endif
1099 #ifndef PNG_NO_WRITE_iTXt
1100 # ifndef PNG_WRITE_iTXt_SUPPORTED
1101 # define PNG_WRITE_iTXt_SUPPORTED
1102 # endif
1103 # ifndef PNG_iTXt_SUPPORTED
1104 # define PNG_iTXt_SUPPORTED
1105 # endif
1106 #endif
1107 #ifndef PNG_NO_WRITE_oFFs
1108 # define PNG_WRITE_oFFs_SUPPORTED
1109 # ifndef PNG_oFFs_SUPPORTED
1110 # define PNG_oFFs_SUPPORTED
1111 # endif
1112 #endif
1113 #ifndef PNG_NO_WRITE_pCAL
1114 # define PNG_WRITE_pCAL_SUPPORTED
1115 # ifndef PNG_pCAL_SUPPORTED
1116 # define PNG_pCAL_SUPPORTED
1117 # endif
1118 #endif
1119 #ifndef PNG_NO_WRITE_sCAL
1120 # define PNG_WRITE_sCAL_SUPPORTED
1121 # ifndef PNG_sCAL_SUPPORTED
1122 # define PNG_sCAL_SUPPORTED
1123 # endif
1124 #endif
1125 #ifndef PNG_NO_WRITE_pHYs
1126 # define PNG_WRITE_pHYs_SUPPORTED
1127 # ifndef PNG_pHYs_SUPPORTED
1128 # define PNG_pHYs_SUPPORTED
1129 # endif
1130 #endif
1131 #ifndef PNG_NO_WRITE_sBIT
1132 # define PNG_WRITE_sBIT_SUPPORTED
1133 # ifndef PNG_sBIT_SUPPORTED
1134 # define PNG_sBIT_SUPPORTED
1135 # endif
1136 #endif
1137 #ifndef PNG_NO_WRITE_sPLT
1138 # define PNG_WRITE_sPLT_SUPPORTED
1139 # ifndef PNG_sPLT_SUPPORTED
1140 # define PNG_sPLT_SUPPORTED
1141 # endif
1142 #endif
1143 #ifndef PNG_NO_WRITE_sRGB
1144 # define PNG_WRITE_sRGB_SUPPORTED
1145 # ifndef PNG_sRGB_SUPPORTED
1146 # define PNG_sRGB_SUPPORTED
1147 # endif
1148 #endif
1149 #ifndef PNG_NO_WRITE_tEXt
1150 # define PNG_WRITE_tEXt_SUPPORTED
1151 # ifndef PNG_tEXt_SUPPORTED
1152 # define PNG_tEXt_SUPPORTED
1153 # endif
1154 #endif
1155 #ifndef PNG_NO_WRITE_tIME
1156 # define PNG_WRITE_tIME_SUPPORTED
1157 # ifndef PNG_tIME_SUPPORTED
1158 # define PNG_tIME_SUPPORTED
1159 # endif
1160 #endif
1161 #ifndef PNG_NO_WRITE_tRNS
1162 # define PNG_WRITE_tRNS_SUPPORTED
1163 # ifndef PNG_tRNS_SUPPORTED
1164 # define PNG_tRNS_SUPPORTED
1165 # endif
1166 #endif
1167 #ifndef PNG_NO_WRITE_zTXt
1168 # define PNG_WRITE_zTXt_SUPPORTED
1169 # ifndef PNG_zTXt_SUPPORTED
1170 # define PNG_zTXt_SUPPORTED
1171 # endif
1172 #endif
1173 #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
1174 defined(PNG_WRITE_zTXt_SUPPORTED)
1175 # define PNG_WRITE_TEXT_SUPPORTED
1176 # ifndef PNG_TEXT_SUPPORTED
1177 # define PNG_TEXT_SUPPORTED
1178 # endif
1179 #endif
1180
1181 #ifdef PNG_WRITE_tIME_SUPPORTED
1182 # ifndef PNG_NO_CONVERT_tIME
1183 # ifndef _WIN32_WCE
1184 /* The "tm" structure is not supported on WindowsCE */
1185 # ifndef PNG_CONVERT_tIME_SUPPORTED
1186 # define PNG_CONVERT_tIME_SUPPORTED
1187 # endif
1188 # endif
1189 # endif
1190 #endif
1191
1192 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
1193
1194 #if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED)
1195 # define PNG_WRITE_FILTER_SUPPORTED
1196 #endif
1197
1198 #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
1199 # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1200 # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
1201 # define PNG_UNKNOWN_CHUNKS_SUPPORTED
1202 # endif
1203 #endif
1204
1205 #ifndef PNG_NO_HANDLE_AS_UNKNOWN
1206 # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1207 # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1208 # endif
1209 #endif
1210 #endif /* PNG_WRITE_SUPPORTED */
1211
1212 /* Turn this off to disable png_read_png() and
1213 * png_write_png() and leave the row_pointers member
1214 * out of the info structure.
1215 */
1216 #ifndef PNG_NO_INFO_IMAGE
1217 # define PNG_INFO_IMAGE_SUPPORTED
1218 #endif
1219
1220 /* Need the time information for converting tIME chunks */
1221 #ifdef PNG_CONVERT_tIME_SUPPORTED
1222 /* "time.h" functions are not supported on WindowsCE */
1223 # include <time.h>
1224 #endif
1225
1226 /* Some typedefs to get us started. These should be safe on most of the
1227 * common platforms. The typedefs should be at least as large as the
1228 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
1229 * don't have to be exactly that size. Some compilers dislike passing
1230 * unsigned shorts as function parameters, so you may be better off using
1231 * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may
1232 * want to have unsigned int for png_uint_32 instead of unsigned long.
1233 */
1234
1235 typedef unsigned long png_uint_32;
1236 typedef long png_int_32;
1237 typedef unsigned short png_uint_16;
1238 typedef short png_int_16;
1239 typedef unsigned char png_byte;
1240
1241 /* This is usually size_t. It is typedef'ed just in case you need it to
1242 change (I'm not sure if you will or not, so I thought I'd be safe) */
1243 #ifdef PNG_SIZE_T
1244 typedef PNG_SIZE_T png_size_t;
1245 # define png_sizeof(x) png_convert_size(sizeof(x))
1246 #else
1247 typedef size_t png_size_t;
1248 # define png_sizeof(x) sizeof(x)
1249 #endif
1250
1251 /* The following is needed for medium model support. It cannot be in the
1252 * PNG_INTERNAL section. Needs modification for other compilers besides
1253 * MSC. Model independent support declares all arrays and pointers to be
1254 * large using the far keyword. The zlib version used must also support
1255 * model independent data. As of version zlib 1.0.4, the necessary changes
1256 * have been made in zlib. The USE_FAR_KEYWORD define triggers other
1257 * changes that are needed. (Tim Wegner)
1258 */
1259
1260 /* Separate compiler dependencies (problem here is that zlib.h always
1261 defines FAR. (SJT) */
1262 #ifdef __BORLANDC__
1263 # if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)
1264 # define LDATA 1
1265 # else
1266 # define LDATA 0
1267 # endif
1268 /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
1269 # if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
1270 # define PNG_MAX_MALLOC_64K
1271 # if (LDATA != 1)
1272 # ifndef FAR
1273 # define FAR __far
1274 # endif
1275 # define USE_FAR_KEYWORD
1276 # endif /* LDATA != 1 */
1277 /* Possibly useful for moving data out of default segment.
1278 * Uncomment it if you want. Could also define FARDATA as
1279 * const if your compiler supports it. (SJT)
1280 # define FARDATA FAR
1281 */
1282 # endif /* __WIN32__, __FLAT__, __CYGWIN__ */
1283 #endif /* __BORLANDC__ */
1284
1285
1286 /* Suggest testing for specific compiler first before testing for
1287 * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM,
1288 * making reliance oncertain keywords suspect. (SJT)
1289 */
1290
1291 /* MSC Medium model */
1292 #ifdef FAR
1293 # ifdef M_I86MM
1294 # define USE_FAR_KEYWORD
1295 # define FARDATA FAR
1296 # include <dos.h>
1297 # endif
1298 #endif
1299
1300 /* SJT: default case */
1301 #ifndef FAR
1302 # define FAR
1303 #endif
1304
1305 /* At this point FAR is always defined */
1306 #ifndef FARDATA
1307 # define FARDATA
1308 #endif
1309
1310 /* Typedef for floating-point numbers that are converted
1311 to fixed-point with a multiple of 100,000, e.g., int_gamma */
1312 typedef png_int_32 png_fixed_point;
1313
1314 /* Add typedefs for pointers */
1315 typedef void FAR * png_voidp;
1316 typedef png_byte FAR * png_bytep;
1317 typedef png_uint_32 FAR * png_uint_32p;
1318 typedef png_int_32 FAR * png_int_32p;
1319 typedef png_uint_16 FAR * png_uint_16p;
1320 typedef png_int_16 FAR * png_int_16p;
1321 typedef PNG_CONST char FAR * png_const_charp;
1322 typedef char FAR * png_charp;
1323 typedef png_fixed_point FAR * png_fixed_point_p;
1324
1325 #ifndef PNG_NO_STDIO
1326 #ifdef _WIN32_WCE
1327 typedef HANDLE png_FILE_p;
1328 #else
1329 typedef FILE * png_FILE_p;
1330 #endif
1331 #endif
1332
1333 #ifdef PNG_FLOATING_POINT_SUPPORTED
1334 typedef double FAR * png_doublep;
1335 #endif
1336
1337 /* Pointers to pointers; i.e. arrays */
1338 typedef png_byte FAR * FAR * png_bytepp;
1339 typedef png_uint_32 FAR * FAR * png_uint_32pp;
1340 typedef png_int_32 FAR * FAR * png_int_32pp;
1341 typedef png_uint_16 FAR * FAR * png_uint_16pp;
1342 typedef png_int_16 FAR * FAR * png_int_16pp;
1343 typedef PNG_CONST char FAR * FAR * png_const_charpp;
1344 typedef char FAR * FAR * png_charpp;
1345 typedef png_fixed_point FAR * FAR * png_fixed_point_pp;
1346 #ifdef PNG_FLOATING_POINT_SUPPORTED
1347 typedef double FAR * FAR * png_doublepp;
1348 #endif
1349
1350 /* Pointers to pointers to pointers; i.e., pointer to array */
1351 typedef char FAR * FAR * FAR * png_charppp;
1352
1353 #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1354 /* SPC - Is this stuff deprecated? */
1355 /* It'll be removed as of libpng-1.4.0 - GR-P */
1356 /* libpng typedefs for types in zlib. If zlib changes
1357 * or another compression library is used, then change these.
1358 * Eliminates need to change all the source files.
1359 */
1360 typedef charf * png_zcharp;
1361 typedef charf * FAR * png_zcharpp;
1362 typedef z_stream FAR * png_zstreamp;
1363 #endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */
1364
1365 /*
1366 * Define PNG_BUILD_DLL if the module being built is a Windows
1367 * LIBPNG DLL.
1368 *
1369 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
1370 * It is equivalent to Microsoft predefined macro _DLL that is
1371 * automatically defined when you compile using the share
1372 * version of the CRT (C Run-Time library)
1373 *
1374 * The cygwin mods make this behavior a little different:
1375 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
1376 * Define PNG_STATIC if you are building a static library for use with cygwin,
1377 * -or- if you are building an application that you want to link to the
1378 * static library.
1379 * PNG_USE_DLL is defined by default (no user action needed) unless one of
1380 * the other flags is defined.
1381 */
1382
1383 #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
1384 # define PNG_DLL
1385 #endif
1386 /* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib.
1387 * When building a static lib, default to no GLOBAL ARRAYS, but allow
1388 * command-line override
1389 */
1390 #ifdef __CYGWIN__
1391 # ifndef PNG_STATIC
1392 # ifdef PNG_USE_GLOBAL_ARRAYS
1393 # undef PNG_USE_GLOBAL_ARRAYS
1394 # endif
1395 # ifndef PNG_USE_LOCAL_ARRAYS
1396 # define PNG_USE_LOCAL_ARRAYS
1397 # endif
1398 # else
1399 # if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS)
1400 # ifdef PNG_USE_GLOBAL_ARRAYS
1401 # undef PNG_USE_GLOBAL_ARRAYS
1402 # endif
1403 # endif
1404 # endif
1405 # if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1406 # define PNG_USE_LOCAL_ARRAYS
1407 # endif
1408 #endif
1409
1410 /* Do not use global arrays (helps with building DLL's)
1411 * They are no longer used in libpng itself, since version 1.0.5c,
1412 * but might be required for some pre-1.0.5c applications.
1413 */
1414 #if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
1415 # if defined(PNG_NO_GLOBAL_ARRAYS) || \
1416 (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER)
1417 # define PNG_USE_LOCAL_ARRAYS
1418 # else
1419 # define PNG_USE_GLOBAL_ARRAYS
1420 # endif
1421 #endif
1422
1423 #ifdef __CYGWIN__
1424 # undef PNGAPI
1425 # define PNGAPI __cdecl
1426 # undef PNG_IMPEXP
1427 # define PNG_IMPEXP
1428 #endif
1429
1430 /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
1431 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
1432 * Don't ignore those warnings; you must also reset the default calling
1433 * convention in your compiler to match your PNGAPI, and you must build
1434 * zlib and your applications the same way you build libpng.
1435 */
1436
1437 #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
1438 # ifndef PNG_NO_MODULEDEF
1439 # define PNG_NO_MODULEDEF
1440 # endif
1441 #endif
1442
1443 #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
1444 # define PNG_IMPEXP
1445 #endif
1446
1447 #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
1448 (( defined(_Windows) || defined(_WINDOWS) || \
1449 defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
1450
1451 # ifndef PNGAPI
1452 # if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
1453 # define PNGAPI __cdecl
1454 # else
1455 # define PNGAPI _cdecl
1456 # endif
1457 # endif
1458
1459 # if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
1460 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
1461 # define PNG_IMPEXP
1462 # endif
1463
1464 # ifndef PNG_IMPEXP
1465
1466 # define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
1467 # define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
1468
1469 /* Borland/Microsoft */
1470 # if defined(_MSC_VER) || defined(__BORLANDC__)
1471 # if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
1472 # define PNG_EXPORT PNG_EXPORT_TYPE1
1473 # else
1474 # define PNG_EXPORT PNG_EXPORT_TYPE2
1475 # ifdef PNG_BUILD_DLL
1476 # define PNG_IMPEXP __export
1477 # else
1478 # define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in
1479 VC++ */
1480 # endif /* Exists in Borland C++ for
1481 C++ classes (== huge) */
1482 # endif
1483 # endif
1484
1485 # ifndef PNG_IMPEXP
1486 # ifdef PNG_BUILD_DLL
1487 # define PNG_IMPEXP __declspec(dllexport)
1488 # else
1489 # define PNG_IMPEXP __declspec(dllimport)
1490 # endif
1491 # endif
1492 # endif /* PNG_IMPEXP */
1493 #else /* !(DLL || non-cygwin WINDOWS) */
1494 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
1495 # ifndef PNGAPI
1496 # define PNGAPI _System
1497 # endif
1498 # else
1499 # if 0 /* ... other platforms, with other meanings */
1500 # endif
1501 # endif
1502 #endif
1503
1504 #ifndef PNGAPI
1505 # define PNGAPI
1506 #endif
1507 #ifndef PNG_IMPEXP
1508 # define PNG_IMPEXP
1509 #endif
1510
1511 #ifdef PNG_BUILDSYMS
1512 # ifndef PNG_EXPORT
1513 # define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
1514 # endif
1515 # ifdef PNG_USE_GLOBAL_ARRAYS
1516 # ifndef PNG_EXPORT_VAR
1517 # define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT
1518 # endif
1519 # endif
1520 #endif
1521
1522 #ifndef PNG_EXPORT
1523 # define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
1524 #endif
1525
1526 #ifdef PNG_USE_GLOBAL_ARRAYS
1527 # ifndef PNG_EXPORT_VAR
1528 # define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type
1529 # endif
1530 #endif
1531
1532 #ifdef PNG_PEDANTIC_WARNINGS
1533 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
1534 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
1535 # endif
1536 #endif
1537
1538 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
1539 /* Support for compiler specific function attributes. These are used
1540 * so that where compiler support is available incorrect use of API
1541 * functions in png.h will generate compiler warnings. Added at libpng
1542 * version 1.2.41.
1543 */
1544 # ifdef __GNUC__
1545 # ifndef PNG_USE_RESULT
1546 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
1547 # endif
1548 # ifndef PNG_NORETURN
1549 # define PNG_NORETURN __attribute__((__noreturn__))
1550 # endif
1551 # ifndef PNG_ALLOCATED
1552 # define PNG_ALLOCATED __attribute__((__malloc__))
1553 # endif
1554
1555 /* This specifically protects structure members that should only be
1556 * accessed from within the library, therefore should be empty during
1557 * a library build.
1558 */
1559 # ifndef PNG_DEPRECATED
1560 # define PNG_DEPRECATED __attribute__((__deprecated__))
1561 # endif
1562 # ifndef PNG_DEPSTRUCT
1563 # define PNG_DEPSTRUCT __attribute__((__deprecated__))
1564 # endif
1565 # ifndef PNG_PRIVATE
1566 # if 0 /* Doesn't work so we use deprecated instead*/
1567 # define PNG_PRIVATE \
1568 __attribute__((warning("This function is not exported by libpng.")))
1569 # else
1570 # define PNG_PRIVATE \
1571 __attribute__((__deprecated__))
1572 # endif
1573 # endif /* PNG_PRIVATE */
1574 # endif /* __GNUC__ */
1575 #endif /* PNG_PEDANTIC_WARNINGS */ 423 #endif /* PNG_PEDANTIC_WARNINGS */
1576 424
1577 #ifndef PNG_DEPRECATED 425 #ifndef PNG_DEPRECATED
1578 # define PNG_DEPRECATED /* Use of this function is deprecated */ 426 # define PNG_DEPRECATED /* Use of this function is deprecated */
1579 #endif 427 #endif
1580 #ifndef PNG_USE_RESULT 428 #ifndef PNG_USE_RESULT
1581 # define PNG_USE_RESULT /* The result of this function must be checked */ 429 # define PNG_USE_RESULT /* The result of this function must be checked */
1582 #endif 430 #endif
1583 #ifndef PNG_NORETURN 431 #ifndef PNG_NORETURN
1584 # define PNG_NORETURN /* This function does not return */ 432 # define PNG_NORETURN /* This function does not return */
1585 #endif 433 #endif
1586 #ifndef PNG_ALLOCATED 434 #ifndef PNG_ALLOCATED
1587 # define PNG_ALLOCATED /* The result of the function is new memory */ 435 # define PNG_ALLOCATED /* The result of the function is new memory */
1588 #endif 436 #endif
1589 #ifndef PNG_DEPSTRUCT
1590 # define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
1591 #endif
1592 #ifndef PNG_PRIVATE 437 #ifndef PNG_PRIVATE
1593 # define PNG_PRIVATE /* This is a private libpng function */ 438 # define PNG_PRIVATE /* This is a private libpng function */
1594 #endif 439 #endif
1595 440 #ifndef PNG_RESTRICT
1596 /* User may want to use these so they are not in PNG_INTERNAL. Any library 441 # define PNG_RESTRICT /* The C99 "restrict" feature */
1597 * functions that are passed far data must be model independent. 442 #endif
1598 */ 443 #ifndef PNG_FP_EXPORT /* A floating point API. */
1599 444 # ifdef PNG_FLOATING_POINT_SUPPORTED
1600 #ifndef PNG_ABORT 445 # define PNG_FP_EXPORT(ordinal, type, name, args)\
1601 # define PNG_ABORT() abort() 446 PNG_EXPORT(ordinal, type, name, args);
1602 #endif 447 # else /* No floating point APIs */
1603 448 # define PNG_FP_EXPORT(ordinal, type, name, args)
1604 #ifdef PNG_SETJMP_SUPPORTED 449 # endif
1605 # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) 450 #endif
451 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
452 # ifdef PNG_FIXED_POINT_SUPPORTED
453 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
454 PNG_EXPORT(ordinal, type, name, args);
455 # else /* No fixed point APIs */
456 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
457 # endif
458 #endif
459
460 #ifndef PNG_BUILDING_SYMBOL_TABLE
461 /* Some typedefs to get us started. These should be safe on most of the common
462 * platforms.
463 *
464 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
465 * 32-bit value however this is not normally advisable.
466 *
467 * png_uint_16 and png_int_16 should always be two bytes in size - this is
468 * verified at library build time.
469 *
470 * png_byte must always be one byte in size.
471 *
472 * The checks below use constants from limits.h, as defined by the ISOC90
473 * standard.
474 */
475 #if CHAR_BIT == 8 && UCHAR_MAX == 255
476 typedef unsigned char png_byte;
1606 #else 477 #else
1607 # define png_jmpbuf(png_ptr) \ 478 # error "libpng requires 8 bit bytes"
1608 (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED) 479 #endif
1609 #endif 480
1610 481 #if INT_MIN == -32768 && INT_MAX == 32767
1611 #ifdef USE_FAR_KEYWORD /* memory model independent fns */ 482 typedef int png_int_16;
1612 /* Use this to make far-to-near assignments */ 483 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
1613 # define CHECK 1 484 typedef short png_int_16;
1614 # define NOCHECK 0 485 #else
1615 # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) 486 # error "libpng requires a signed 16 bit type"
1616 # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) 487 #endif
1617 # define png_snprintf _fsnprintf /* Added to v 1.2.19 */ 488
1618 # define png_strlen _fstrlen 489 #if UINT_MAX == 65535
1619 # define png_memcmp _fmemcmp /* SJT: added */ 490 typedef unsigned int png_uint_16;
1620 # define png_memcpy _fmemcpy 491 #elif USHRT_MAX == 65535
1621 # define png_memset _fmemset 492 typedef unsigned short png_uint_16;
1622 #else /* Use the usual functions */ 493 #else
1623 # define CVT_PTR(ptr) (ptr) 494 # error "libpng requires an unsigned 16 bit type"
1624 # define CVT_PTR_NOCHECK(ptr) (ptr) 495 #endif
1625 # ifndef PNG_NO_SNPRINTF 496
1626 # ifdef _MSC_VER 497 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
1627 # define png_snprintf _snprintf /* Added to v 1.2.19 */ 498 typedef int png_int_32;
1628 # define png_snprintf2 _snprintf 499 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
1629 # define png_snprintf6 _snprintf 500 typedef long int png_int_32;
1630 # else 501 #else
1631 # define png_snprintf snprintf /* Added to v 1.2.19 */ 502 # error "libpng requires a signed 32 bit (or more) type"
1632 # define png_snprintf2 snprintf 503 #endif
1633 # define png_snprintf6 snprintf 504
1634 # endif 505 #if UINT_MAX > 4294967294
1635 # else 506 typedef unsigned int png_uint_32;
1636 /* You don't have or don't want to use snprintf(). Caution: Using 507 #elif ULONG_MAX > 4294967294
1637 * sprintf instead of snprintf exposes your application to accidental 508 typedef unsigned long int png_uint_32;
1638 * or malevolent buffer overflows. If you don't have snprintf() 509 #else
1639 * as a general rule you should provide one (you can get one from 510 # error "libpng requires an unsigned 32 bit (or more) type"
1640 * Portable OpenSSH). 511 #endif
1641 */ 512
1642 # define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1) 513 /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however,
1643 # define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2) 514 * requires an ISOC90 compiler and relies on consistent behavior of sizeof.
1644 # define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \ 515 */
1645 sprintf(s1,fmt,x1,x2,x3,x4,x5,x6) 516 typedef size_t png_size_t;
1646 # endif 517 typedef ptrdiff_t png_ptrdiff_t;
1647 # define png_strlen strlen 518
1648 # define png_memcmp memcmp /* SJT: added */ 519 /* libpng needs to know the maximum value of 'size_t' and this controls the
1649 # define png_memcpy memcpy 520 * definition of png_alloc_size_t, below. This maximum value of size_t limits
1650 # define png_memset memset 521 * but does not control the maximum allocations the library makes - there is
1651 #endif 522 * direct application control of this through png_set_user_limits().
1652 /* End of memory model independent support */ 523 */
1653 524 #ifndef PNG_SMALL_SIZE_T
1654 /* Just a little check that someone hasn't tried to define something 525 /* Compiler specific tests for systems where size_t is known to be less than
1655 * contradictory. 526 * 32 bits (some of these systems may no longer work because of the lack of
1656 */ 527 * 'far' support; see above.)
1657 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) 528 */
1658 # undef PNG_ZBUF_SIZE 529 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
1659 # define PNG_ZBUF_SIZE 65536L 530 (defined(_MSC_VER) && defined(MAXSEG_64K))
1660 #endif 531 # define PNG_SMALL_SIZE_T
1661 532 # endif
1662 /* Added at libpng-1.2.8 */ 533 #endif
1663 #endif /* PNG_VERSION_INFO_ONLY */ 534
535 /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no
536 * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to
537 * png_alloc_size_t are not necessary; in fact, it is recommended not to use
538 * them at all so that the compiler can complain when something turns out to be
539 * problematic.
540 *
541 * Casts in the other direction (from png_alloc_size_t to png_size_t or
542 * png_uint_32) should be explicitly applied; however, we do not expect to
543 * encounter practical situations that require such conversions.
544 *
545 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
546 * 4294967295 - i.e. less than the maximum value of png_uint_32.
547 */
548 #ifdef PNG_SMALL_SIZE_T
549 typedef png_uint_32 png_alloc_size_t;
550 #else
551 typedef png_size_t png_alloc_size_t;
552 #endif
553
554 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
555 * implementations of Intel CPU specific support of user-mode segmented address
556 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
557 * separate 'segment' registers. The implementation requires two different
558 * types of pointer (only one of which includes the segment value.)
559 *
560 * If required this support is available in version 1.2 of libpng and may be
561 * available in versions through 1.5, although the correctness of the code has
562 * not been verified recently.
563 */
564
565 /* Typedef for floating-point numbers that are converted to fixed-point with a
566 * multiple of 100,000, e.g., gamma
567 */
568 typedef png_int_32 png_fixed_point;
569
570 /* Add typedefs for pointers */
571 typedef void * png_voidp;
572 typedef const void * png_const_voidp;
573 typedef png_byte * png_bytep;
574 typedef const png_byte * png_const_bytep;
575 typedef png_uint_32 * png_uint_32p;
576 typedef const png_uint_32 * png_const_uint_32p;
577 typedef png_int_32 * png_int_32p;
578 typedef const png_int_32 * png_const_int_32p;
579 typedef png_uint_16 * png_uint_16p;
580 typedef const png_uint_16 * png_const_uint_16p;
581 typedef png_int_16 * png_int_16p;
582 typedef const png_int_16 * png_const_int_16p;
583 typedef char * png_charp;
584 typedef const char * png_const_charp;
585 typedef png_fixed_point * png_fixed_point_p;
586 typedef const png_fixed_point * png_const_fixed_point_p;
587 typedef png_size_t * png_size_tp;
588 typedef const png_size_t * png_const_size_tp;
589
590 #ifdef PNG_STDIO_SUPPORTED
591 typedef FILE * png_FILE_p;
592 #endif
593
594 #ifdef PNG_FLOATING_POINT_SUPPORTED
595 typedef double * png_doublep;
596 typedef const double * png_const_doublep;
597 #endif
598
599 /* Pointers to pointers; i.e. arrays */
600 typedef png_byte * * png_bytepp;
601 typedef png_uint_32 * * png_uint_32pp;
602 typedef png_int_32 * * png_int_32pp;
603 typedef png_uint_16 * * png_uint_16pp;
604 typedef png_int_16 * * png_int_16pp;
605 typedef const char * * png_const_charpp;
606 typedef char * * png_charpp;
607 typedef png_fixed_point * * png_fixed_point_pp;
608 #ifdef PNG_FLOATING_POINT_SUPPORTED
609 typedef double * * png_doublepp;
610 #endif
611
612 /* Pointers to pointers to pointers; i.e., pointer to array */
613 typedef char * * * png_charppp;
614
615 #endif /* PNG_BUILDING_SYMBOL_TABLE */
1664 616
1665 #endif /* PNGCONF_H */ 617 #endif /* PNGCONF_H */
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