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  1. 

  2. /* pngconf.h - machine configurable file for libpng

  3.  *

  4.  * libpng version 1.4.3 - June 26, 2010

  5.  * For conditions of distribution and use, see copyright notice in png.h

  6.  * Copyright (c) 1998-2010 Glenn Randers-Pehrson

  7.  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

  8.  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

  9.  *

  10.  * This code is released under the libpng license.

  11.  * For conditions of distribution and use, see the disclaimer

  12.  * and license in png.h

  13.  *

  14.  */

  15. 

  16. /* Any machine specific code is near the front of this file, so if you

  17.  * are configuring libpng for a machine, you may want to read the section

  18.  * starting here down to where it starts to typedef png_color, png_text,

  19.  * and png_info.

  20.  */

  21. 

  22. #ifndef PNGCONF_H

  23. #define PNGCONF_H

  24. 

  25. #ifndef PNG_NO_LIMITS_H

  26. #  include <limits.h>

  27. #endif

  28. 

  29. /* Added at libpng-1.2.9 */

  30. 

  31. /* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"

  32.  * script.

  33.  */

  34. #ifdef PNG_CONFIGURE_LIBPNG

  35. #  ifdef HAVE_CONFIG_H

  36. #    include "config.h"

  37. #  endif

  38. #endif

  39. 

  40. /*

  41.  * Added at libpng-1.2.8

  42.  *

  43.  * PNG_USER_CONFIG has to be defined on the compiler command line. This

  44.  * includes the resource compiler for Windows DLL configurations.

  45.  */

  46. #ifdef PNG_USER_CONFIG

  47. #  ifndef PNG_USER_PRIVATEBUILD

  48. #    define PNG_USER_PRIVATEBUILD

  49. #  endif

  50. #  include "pngusr.h"

  51. #endif

  52. 

  53. /*

  54.  * If you create a private DLL you need to define in "pngusr.h" the followings:

  55.  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of

  56.  *        the DLL was built>

  57.  *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."

  58.  * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to

  59.  *        distinguish your DLL from those of the official release. These

  60.  *        correspond to the trailing letters that come after the version

  61.  *        number and must match your private DLL name>

  62.  *  e.g. // private DLL "libpng13gx.dll"

  63.  *       #define PNG_USER_DLLFNAME_POSTFIX "gx"

  64.  *

  65.  * The following macros are also at your disposal if you want to complete the

  66.  * DLL VERSIONINFO structure.

  67.  * - PNG_USER_VERSIONINFO_COMMENTS

  68.  * - PNG_USER_VERSIONINFO_COMPANYNAME

  69.  * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS

  70.  */

  71. 

  72. #ifdef __STDC__

  73. #  ifdef SPECIALBUILD

  74. #    pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\

  75.      are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")

  76. #  endif

  77. 

  78. #  ifdef PRIVATEBUILD

  79. #    pragma message("PRIVATEBUILD is deprecated.\

  80.      Use PNG_USER_PRIVATEBUILD instead.")

  81. #    define PNG_USER_PRIVATEBUILD PRIVATEBUILD

  82. #  endif

  83. #endif /* __STDC__ */

  84. 

  85. /* End of material added to libpng-1.2.8 */

  86. 

  87. #ifndef PNG_VERSION_INFO_ONLY

  88. 

  89. /* This is the size of the compression buffer, and thus the size of

  90.  * an IDAT chunk.  Make this whatever size you feel is best for your

  91.  * machine.  One of these will be allocated per png_struct.  When this

  92.  * is full, it writes the data to the disk, and does some other

  93.  * calculations.  Making this an extremely small size will slow

  94.  * the library down, but you may want to experiment to determine

  95.  * where it becomes significant, if you are concerned with memory

  96.  * usage.  Note that zlib allocates at least 32Kb also.  For readers,

  97.  * this describes the size of the buffer available to read the data in.

  98.  * Unless this gets smaller than the size of a row (compressed),

  99.  * it should not make much difference how big this is.

  100.  */

  101. 

  102. #ifndef PNG_ZBUF_SIZE

  103. #  define PNG_ZBUF_SIZE 8192

  104. #endif

  105. 

  106. /* Enable if you want a write-only libpng */

  107. 

  108. #ifndef PNG_NO_READ_SUPPORTED

  109. #  define PNG_READ_SUPPORTED

  110. #endif

  111. 

  112. /* Enable if you want a read-only libpng */

  113. 

  114. #ifndef PNG_NO_WRITE_SUPPORTED

  115. #  define PNG_WRITE_SUPPORTED

  116. #endif

  117. 

  118. /* Enabled in 1.4.0. */

  119. #ifdef PNG_ALLOW_BENIGN_ERRORS

  120. #  define png_benign_error png_warning

  121. #  define png_chunk_benign_error png_chunk_warning

  122. #else

  123. #  ifndef PNG_BENIGN_ERRORS_SUPPORTED

  124. #    define png_benign_error png_error

  125. #    define png_chunk_benign_error png_chunk_error

  126. #  endif

  127. #endif

  128. 

  129. /* Added at libpng version 1.4.0 */

  130. #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)

  131. #  define PNG_WARNINGS_SUPPORTED

  132. #endif

  133. 

  134. /* Added at libpng version 1.4.0 */

  135. #if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)

  136. #  define PNG_ERROR_TEXT_SUPPORTED

  137. #endif

  138. 

  139. /* Added at libpng version 1.4.0 */

  140. #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)

  141. #  define PNG_CHECK_cHRM_SUPPORTED

  142. #endif

  143. 

  144. /* Added at libpng version 1.4.0 */

  145. #if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED)

  146. #  define PNG_ALIGNED_MEMORY_SUPPORTED

  147. #endif

  148. 

  149. /* Enabled by default in 1.2.0.  You can disable this if you don't need to

  150.    support PNGs that are embedded in MNG datastreams */

  151. #ifndef PNG_NO_MNG_FEATURES

  152. #  ifndef PNG_MNG_FEATURES_SUPPORTED

  153. #    define PNG_MNG_FEATURES_SUPPORTED

  154. #  endif

  155. #endif

  156. 

  157. /* Added at libpng version 1.4.0 */

  158. #ifndef PNG_NO_FLOATING_POINT_SUPPORTED

  159. #  ifndef PNG_FLOATING_POINT_SUPPORTED

  160. #    define PNG_FLOATING_POINT_SUPPORTED

  161. #  endif

  162. #endif

  163. 

  164. /* Added at libpng-1.4.0beta49 for testing (this test is no longer used

  165.    in libpng and png_calloc() is always present)

  166.  */

  167. #define PNG_CALLOC_SUPPORTED

  168. 

  169. /* If you are running on a machine where you cannot allocate more

  170.  * than 64K of memory at once, uncomment this.  While libpng will not

  171.  * normally need that much memory in a chunk (unless you load up a very

  172.  * large file), zlib needs to know how big of a chunk it can use, and

  173.  * libpng thus makes sure to check any memory allocation to verify it

  174.  * will fit into memory.

  175. #define PNG_MAX_MALLOC_64K

  176.  */

  177. #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)

  178. #  define PNG_MAX_MALLOC_64K

  179. #endif

  180. 

  181. /* Special munging to support doing things the 'cygwin' way:

  182.  * 'Normal' png-on-win32 defines/defaults:

  183.  *   PNG_BUILD_DLL -- building dll

  184.  *   PNG_USE_DLL   -- building an application, linking to dll

  185.  *   (no define)   -- building static library, or building an

  186.  *                    application and linking to the static lib

  187.  * 'Cygwin' defines/defaults:

  188.  *   PNG_BUILD_DLL -- (ignored) building the dll

  189.  *   (no define)   -- (ignored) building an application, linking to the dll

  190.  *   PNG_STATIC    -- (ignored) building the static lib, or building an

  191.  *                    application that links to the static lib.

  192.  *   ALL_STATIC    -- (ignored) building various static libs, or building an

  193.  *                    application that links to the static libs.

  194.  * Thus,

  195.  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and

  196.  * this bit of #ifdefs will define the 'correct' config variables based on

  197.  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but

  198.  * unnecessary.

  199.  *

  200.  * Also, the precedence order is:

  201.  *   ALL_STATIC (since we can't #undef something outside our namespace)

  202.  *   PNG_BUILD_DLL

  203.  *   PNG_STATIC

  204.  *   (nothing) == PNG_USE_DLL

  205.  *

  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.

  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

  228. #  else

  229. #    ifdef PNG_BUILD_DLL

  230. #      ifdef PNG_STATIC

  231. #        undef PNG_STATIC

  232. #      endif

  233. #      ifdef PNG_USE_DLL

  234. #        undef PNG_USE_DLL

  235. #      endif

  236. #      ifndef PNG_DLL

  237. #        define PNG_DLL

  238. #      endif

  239. #    else

  240. #      ifdef PNG_STATIC

  241. #        ifdef PNG_USE_DLL

  242. #          undef PNG_USE_DLL

  243. #        endif

  244. #        ifdef PNG_DLL

  245. #          undef PNG_DLL

  246. #        endif

  247. #      else

  248. #        ifndef PNG_USE_DLL

  249. #          define PNG_USE_DLL

  250. #        endif

  251. #        ifndef PNG_DLL

  252. #          define PNG_DLL

  253. #        endif

  254. #      endif

  255. #    endif

  256. #  endif

  257. #endif

  258. 

  259. /* This protects us against compilers that run on a windowing system

  260.  * and thus don't have or would rather us not use the stdio types:

  261.  * stdin, stdout, and stderr.  The only one currently used is stderr

  262.  * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will

  263.  * prevent these from being compiled and used. #defining PNG_NO_STDIO

  264.  * will also prevent these, plus will prevent the entire set of stdio

  265.  * macros and functions (FILE *, printf, etc.) from being compiled and used,

  266.  * unless (PNG_DEBUG > 0) has been #defined.

  267.  *

  268.  * #define PNG_NO_CONSOLE_IO

  269.  * #define PNG_NO_STDIO

  270.  */

  271. 

  272. #if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)

  273. #  define PNG_STDIO_SUPPORTED

  274. #endif

  275. 

  276. 

  277. #ifdef PNG_BUILD_DLL

  278. #  if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO)

  279. #    define PNG_NO_CONSOLE_IO

  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

  291. #    endif

  292. #  else

  293. #    include <stdio.h>

  294. #  endif

  295. 

  296. #if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)

  297. #  define PNG_CONSOLE_IO_SUPPORTED

  298. #endif

  299. 

  300. /* This macro protects us against machines that don't have function

  301.  * prototypes (ie K&R style headers).  If your compiler does not handle

  302.  * function prototypes, define this macro and use the included ansi2knr.

  303.  * I've always been able to use _NO_PROTO as the indicator, but you may

  304.  * need to drag the empty declaration out in front of here, or change the

  305.  * ifdef to suit your own needs.

  306.  */

  307. #ifndef PNGARG

  308. 

  309. #ifdef OF /* zlib prototype munger */

  310. #  define PNGARG(arglist) OF(arglist)

  311. #else

  312. 

  313. #ifdef _NO_PROTO

  314. #  define PNGARG(arglist) ()

  315. #else

  316. #  define PNGARG(arglist) arglist

  317. #endif /* _NO_PROTO */

  318. 

  319. #endif /* OF */

  320. 

  321. #endif /* PNGARG */

  322. 

  323. /* Try to determine if we are compiling on a Mac.  Note that testing for

  324.  * just __MWERKS__ is not good enough, because the Codewarrior is now used

  325.  * on non-Mac platforms.

  326.  */

  327. #ifndef MACOS

  328. #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \

  329.       defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)

  330. #    define MACOS

  331. #  endif

  332. #endif

  333. 

  334. /* Enough people need this for various reasons to include it here */

  335. #if !defined(MACOS) && !defined(RISCOS)

  336. #  include <sys/types.h>

  337. #endif

  338. 

  339. /* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */

  340. #if !defined(PNG_NO_SETJMP) && \

  341.     !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)

  342. #  define PNG_SETJMP_SUPPORTED

  343. #endif

  344. 

  345. #ifdef PNG_SETJMP_SUPPORTED

  346. /* This is an attempt to force a single setjmp behaviour on Linux.  If

  347.  * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.

  348.  *

  349.  * You can bypass this test if you know that your application uses exactly

  350.  * the same setjmp.h that was included when libpng was built.  Only define

  351.  * PNG_SKIP_SETJMP_CHECK while building your application, prior to the

  352.  * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK

  353.  * while building a separate libpng library for general use.

  354.  */

  355. 

  356. #  ifndef PNG_SKIP_SETJMP_CHECK

  357. #    ifdef __linux__

  358. #      ifdef _BSD_SOURCE

  359. #        define PNG_SAVE_BSD_SOURCE

  360. #        undef _BSD_SOURCE

  361. #      endif

  362. #      ifdef _SETJMP_H

  363.        /* If you encounter a compiler error here, see the explanation

  364.         * near the end of INSTALL.

  365.         */

  366.            __pngconf.h__ in libpng already includes setjmp.h;

  367.            __dont__ include it again.;

  368. #      endif

  369. #    endif /* __linux__ */

  370. #  endif /* PNG_SKIP_SETJMP_CHECK */

  371. 

  372.    /* Include setjmp.h for error handling */

  373. #  include <setjmp.h>

  374. 

  375. #  ifdef __linux__

  376. #    ifdef PNG_SAVE_BSD_SOURCE

  377. #      ifdef _BSD_SOURCE

  378. #        undef _BSD_SOURCE

  379. #      endif

  380. #      define _BSD_SOURCE

  381. #      undef PNG_SAVE_BSD_SOURCE

  382. #    endif

  383. #  endif /* __linux__ */

  384. #endif /* PNG_SETJMP_SUPPORTED */

  385. 

  386. #ifdef BSD

  387. #  include <strings.h>

  388. #else

  389. #  include <string.h>

  390. #endif

  391. 

  392. /* Other defines for things like memory and the like can go here.  */

  393. 

  394. /* This controls how fine the quantizing gets.  As this allocates

  395.  * a largish chunk of memory (32K), those who are not as concerned

  396.  * with quantizing quality can decrease some or all of these.

  397.  */

  398. 

  399. /* Prior to libpng-1.4.2, these were PNG_DITHER_*_BITS

  400.  * These migration aids will be removed from libpng-1.5.0.

  401.  */

  402. #ifdef PNG_DITHER_RED_BITS

  403. #  define PNG_QUANTIZE_RED_BITS PNG_DITHER_RED_BITS

  404. #endif

  405. #ifdef PNG_DITHER_GREEN_BITS

  406. #  define PNG_QUANTIZE_GREEN_BITS PNG_DITHER_GREEN_BITS

  407. #endif

  408. #ifdef PNG_DITHER_BLUE_BITS

  409. #  define PNG_QUANTIZE_BLUE_BITS PNG_DITHER_BLUE_BITS

  410. #endif

  411. 

  412. #ifndef PNG_QUANTIZE_RED_BITS

  413. #  define PNG_QUANTIZE_RED_BITS 5

  414. #endif

  415. #ifndef PNG_QUANTIZE_GREEN_BITS

  416. #  define PNG_QUANTIZE_GREEN_BITS 5

  417. #endif

  418. #ifndef PNG_QUANTIZE_BLUE_BITS

  419. #  define PNG_QUANTIZE_BLUE_BITS 5

  420. #endif

  421. 

  422. /* This controls how fine the gamma correction becomes when you

  423.  * are only interested in 8 bits anyway.  Increasing this value

  424.  * results in more memory being used, and more pow() functions

  425.  * being called to fill in the gamma tables.  Don't set this value

  426.  * less then 8, and even that may not work (I haven't tested it).

  427.  */

  428. 

  429. #ifndef PNG_MAX_GAMMA_8

  430. #  define PNG_MAX_GAMMA_8 11

  431. #endif

  432. 

  433. /* This controls how much a difference in gamma we can tolerate before

  434.  * we actually start doing gamma conversion.

  435.  */

  436. #ifndef PNG_GAMMA_THRESHOLD

  437. #  define PNG_GAMMA_THRESHOLD 0.05

  438. #endif

  439. 

  440. /* The following uses const char * instead of char * for error

  441.  * and warning message functions, so some compilers won't complain.

  442.  * If you do not want to use const, define PNG_NO_CONST here.

  443.  */

  444. 

  445. #ifndef PNG_CONST

  446. #  ifndef PNG_NO_CONST

  447. #    define PNG_CONST const

  448. #  else

  449. #    define PNG_CONST

  450. #  endif

  451. #endif

  452. 

  453. /* The following defines give you the ability to remove code from the

  454.  * library that you will not be using.  I wish I could figure out how to

  455.  * automate this, but I can't do that without making it seriously hard

  456.  * on the users.  So if you are not using an ability, change the #define

  457.  * to and #undef, and that part of the library will not be compiled.  If

  458.  * your linker can't find a function, you may want to make sure the

  459.  * ability is defined here.  Some of these depend upon some others being

  460.  * defined.  I haven't figured out all the interactions here, so you may

  461.  * have to experiment awhile to get everything to compile.  If you are

  462.  * creating or using a shared library, you probably shouldn't touch this,

  463.  * as it will affect the size of the structures, and this will cause bad

  464.  * things to happen if the library and/or application ever change.

  465.  */

  466. 

  467. /* Any features you will not be using can be undef'ed here */

  468. 

  469. /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user

  470.  * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line,

  471.  * then pick and choose which ones to define without having to edit this

  472.  * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS

  473.  * if you only want to have a png-compliant reader/writer but don't need

  474.  * any of the extra transformations.  This saves about 80 kbytes in a

  475.  * typical installation of the library. (PNG_NO_* form added in version

  476.  * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in

  477.  * 1.4.0)

  478.  */

  479. 

  480. /* Ignore attempt to turn off both floating and fixed point support */

  481. #if !defined(PNG_FLOATING_POINT_SUPPORTED) || \

  482.     !defined(PNG_NO_FIXED_POINT_SUPPORTED)

  483. #  define PNG_FIXED_POINT_SUPPORTED

  484. #endif

  485. 

  486. #ifdef PNG_READ_SUPPORTED

  487. 

  488. /* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */

  489. #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \

  490.       !defined(PNG_NO_READ_TRANSFORMS)

  491. #  define PNG_READ_TRANSFORMS_SUPPORTED

  492. #endif

  493. 

  494. #ifdef PNG_READ_TRANSFORMS_SUPPORTED

  495. #  ifndef PNG_NO_READ_EXPAND

  496. #    define PNG_READ_EXPAND_SUPPORTED

  497. #  endif

  498. #  ifndef PNG_NO_READ_SHIFT

  499. #    define PNG_READ_SHIFT_SUPPORTED

  500. #  endif

  501. #  ifndef PNG_NO_READ_PACK

  502. #    define PNG_READ_PACK_SUPPORTED

  503. #  endif

  504. #  ifndef PNG_NO_READ_BGR

  505. #    define PNG_READ_BGR_SUPPORTED

  506. #  endif

  507. #  ifndef PNG_NO_READ_SWAP

  508. #    define PNG_READ_SWAP_SUPPORTED

  509. #  endif

  510. #  ifndef PNG_NO_READ_PACKSWAP

  511. #    define PNG_READ_PACKSWAP_SUPPORTED

  512. #  endif

  513. #  ifndef PNG_NO_READ_INVERT

  514. #    define PNG_READ_INVERT_SUPPORTED

  515. #  endif

  516. #  ifndef PNG_NO_READ_QUANTIZE

  517.      /* Prior to libpng-1.4.0 this was PNG_READ_DITHER_SUPPORTED */

  518. #    ifndef PNG_NO_READ_DITHER  /* This migration aid will be removed */

  519. #      define PNG_READ_QUANTIZE_SUPPORTED

  520. #    endif

  521. #  endif

  522. #  ifndef PNG_NO_READ_BACKGROUND

  523. #    define PNG_READ_BACKGROUND_SUPPORTED

  524. #  endif

  525. #  ifndef PNG_NO_READ_16_TO_8

  526. #    define PNG_READ_16_TO_8_SUPPORTED

  527. #  endif

  528. #  ifndef PNG_NO_READ_FILLER

  529. #    define PNG_READ_FILLER_SUPPORTED

  530. #  endif

  531. #  ifndef PNG_NO_READ_GAMMA

  532. #    define PNG_READ_GAMMA_SUPPORTED

  533. #  endif

  534. #  ifndef PNG_NO_READ_GRAY_TO_RGB

  535. #    define PNG_READ_GRAY_TO_RGB_SUPPORTED

  536. #  endif

  537. #  ifndef PNG_NO_READ_SWAP_ALPHA

  538. #    define PNG_READ_SWAP_ALPHA_SUPPORTED

  539. #  endif

  540. #  ifndef PNG_NO_READ_INVERT_ALPHA

  541. #    define PNG_READ_INVERT_ALPHA_SUPPORTED

  542. #  endif

  543. #  ifndef PNG_NO_READ_STRIP_ALPHA

  544. #    define PNG_READ_STRIP_ALPHA_SUPPORTED

  545. #  endif

  546. #  ifndef PNG_NO_READ_USER_TRANSFORM

  547. #    define PNG_READ_USER_TRANSFORM_SUPPORTED

  548. #  endif

  549. #  ifndef PNG_NO_READ_RGB_TO_GRAY

  550. #    define PNG_READ_RGB_TO_GRAY_SUPPORTED

  551. #  endif

  552. #endif /* PNG_READ_TRANSFORMS_SUPPORTED */

  553. 

  554. /* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */

  555. #if !defined(PNG_NO_PROGRESSIVE_READ) && \

  556.  !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED)  /* if you don't do progressive */

  557. #  define PNG_PROGRESSIVE_READ_SUPPORTED     /* reading.  This is not talking */

  558. #endif                               /* about interlacing capability!  You'll */

  559.             /* still have interlacing unless you change the following define: */

  560. 

  561. #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */

  562. 

  563. /* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */

  564. #if !defined(PNG_NO_SEQUENTIAL_READ) && \

  565.     !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \

  566.     !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)

  567. #  define PNG_SEQUENTIAL_READ_SUPPORTED

  568. #endif

  569. 

  570. #ifndef PNG_NO_READ_COMPOSITE_NODIV

  571. #  ifndef PNG_NO_READ_COMPOSITED_NODIV  /* libpng-1.0.x misspelling */

  572. #    define PNG_READ_COMPOSITE_NODIV_SUPPORTED   /* well tested on Intel, SGI */

  573. #  endif

  574. #endif

  575. 

  576. #if !defined(PNG_NO_GET_INT_32) || defined(PNG_READ_oFFS_SUPPORTED) || \

  577.     defined(PNG_READ_pCAL_SUPPORTED)

  578. #  ifndef PNG_GET_INT_32_SUPPORTED

  579. #    define PNG_GET_INT_32_SUPPORTED

  580. #  endif

  581. #endif

  582. 

  583. #endif /* PNG_READ_SUPPORTED */

  584. 

  585. #ifdef PNG_WRITE_SUPPORTED

  586. 

  587. /* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */

  588. #if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \

  589.     !defined(PNG_NO_WRITE_TRANSFORMS)

  590. #  define PNG_WRITE_TRANSFORMS_SUPPORTED

  591. #endif

  592. 

  593. #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED

  594. #  ifndef PNG_NO_WRITE_SHIFT

  595. #    define PNG_WRITE_SHIFT_SUPPORTED

  596. #  endif

  597. #  ifndef PNG_NO_WRITE_PACK

  598. #    define PNG_WRITE_PACK_SUPPORTED

  599. #  endif

  600. #  ifndef PNG_NO_WRITE_BGR

  601. #    define PNG_WRITE_BGR_SUPPORTED

  602. #  endif

  603. #  ifndef PNG_NO_WRITE_SWAP

  604. #    define PNG_WRITE_SWAP_SUPPORTED

  605. #  endif

  606. #  ifndef PNG_NO_WRITE_PACKSWAP

  607. #    define PNG_WRITE_PACKSWAP_SUPPORTED

  608. #  endif

  609. #  ifndef PNG_NO_WRITE_INVERT

  610. #    define PNG_WRITE_INVERT_SUPPORTED

  611. #  endif

  612. #  ifndef PNG_NO_WRITE_FILLER

  613. #    define PNG_WRITE_FILLER_SUPPORTED   /* same as WRITE_STRIP_ALPHA */

  614. #  endif

  615. #  ifndef PNG_NO_WRITE_SWAP_ALPHA

  616. #    define PNG_WRITE_SWAP_ALPHA_SUPPORTED

  617. #  endif

  618. #  ifndef PNG_NO_WRITE_INVERT_ALPHA

  619. #    define PNG_WRITE_INVERT_ALPHA_SUPPORTED

  620. #  endif

  621. #  ifndef PNG_NO_WRITE_USER_TRANSFORM

  622. #    define PNG_WRITE_USER_TRANSFORM_SUPPORTED

  623. #  endif

  624. #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */

  625. 

  626. #if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \

  627.     !defined(PNG_WRITE_INTERLACING_SUPPORTED)

  628.     /* This is not required for PNG-compliant encoders, but can cause

  629.      * trouble if left undefined

  630.     */

  631. #  define PNG_WRITE_INTERLACING_SUPPORTED

  632. #endif

  633. 

  634. #if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \

  635.     !defined(PNG_WRITE_WEIGHTED_FILTER) && \

  636.      defined(PNG_FLOATING_POINT_SUPPORTED)

  637. #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED

  638. #endif

  639. 

  640. #ifndef PNG_NO_WRITE_FLUSH

  641. #  define PNG_WRITE_FLUSH_SUPPORTED

  642. #endif

  643. 

  644. #if !defined(PNG_NO_SAVE_INT_32) || defined(PNG_WRITE_oFFS_SUPPORTED) || \

  645.     defined(PNG_WRITE_pCAL_SUPPORTED)

  646. #  ifndef PNG_SAVE_INT_32_SUPPORTED

  647. #    define PNG_SAVE_INT_32_SUPPORTED

  648. #  endif

  649. #endif

  650. 

  651. #endif /* PNG_WRITE_SUPPORTED */

  652. 

  653. #define PNG_NO_ERROR_NUMBERS

  654. 

  655. #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \

  656.     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)

  657. #  ifndef PNG_NO_USER_TRANSFORM_PTR

  658. #    define PNG_USER_TRANSFORM_PTR_SUPPORTED

  659. #  endif

  660. #endif

  661. 

  662. #if defined(PNG_STDIO_SUPPORTED) && !defined(PNG_TIME_RFC1123_SUPPORTED)

  663. #  define PNG_TIME_RFC1123_SUPPORTED

  664. #endif

  665. 

  666. /* This adds extra functions in pngget.c for accessing data from the

  667.  * info pointer (added in version 0.99)

  668.  * png_get_image_width()

  669.  * png_get_image_height()

  670.  * png_get_bit_depth()

  671.  * png_get_color_type()

  672.  * png_get_compression_type()

  673.  * png_get_filter_type()

  674.  * png_get_interlace_type()

  675.  * png_get_pixel_aspect_ratio()

  676.  * png_get_pixels_per_meter()

  677.  * png_get_x_offset_pixels()

  678.  * png_get_y_offset_pixels()

  679.  * png_get_x_offset_microns()

  680.  * png_get_y_offset_microns()

  681.  */

  682. #if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)

  683. #  define PNG_EASY_ACCESS_SUPPORTED

  684. #endif

  685. 

  686. /* Added at libpng-1.2.0 */

  687. #if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)

  688. #  define PNG_USER_MEM_SUPPORTED

  689. #endif

  690. 

  691. /* Added at libpng-1.2.6 */

  692. #ifndef PNG_NO_SET_USER_LIMITS

  693. #  ifndef PNG_SET_USER_LIMITS_SUPPORTED

  694. #    define PNG_SET_USER_LIMITS_SUPPORTED

  695. #  endif

  696.   /* Feature added at libpng-1.4.0, this flag added at 1.4.1 */

  697. #  ifndef PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED

  698. #    define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED

  699. #  endif

  700.   /* Feature added at libpng-1.4.1, this flag added at 1.4.1 */

  701. #  ifndef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED

  702. #    define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED

  703. #  endif

  704. #endif

  705. 

  706. /* Added at libpng-1.2.43 */

  707. #ifndef PNG_USER_LIMITS_SUPPORTED

  708. #  ifndef PNG_NO_USER_LIMITS

  709. #    define PNG_USER_LIMITS_SUPPORTED

  710. #  endif

  711. #endif

  712. 

  713. /* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGs no matter

  714.  * how large, set these two limits to 0x7fffffffL

  715.  */

  716. #ifndef PNG_USER_WIDTH_MAX

  717. #  define PNG_USER_WIDTH_MAX 1000000L

  718. #endif

  719. #ifndef PNG_USER_HEIGHT_MAX

  720. #  define PNG_USER_HEIGHT_MAX 1000000L

  721. #endif

  722. 

  723. /* Added at libpng-1.2.43.  To accept all valid PNGs no matter

  724.  * how large, set these two limits to 0.

  725.  */

  726. #ifndef PNG_USER_CHUNK_CACHE_MAX

  727. #  define PNG_USER_CHUNK_CACHE_MAX 0

  728. #endif

  729. 

  730. /* Added at libpng-1.2.43 */

  731. #ifndef PNG_USER_CHUNK_MALLOC_MAX

  732. #  define PNG_USER_CHUNK_MALLOC_MAX 0

  733. #endif

  734. 

  735. /* Added at libpng-1.4.0 */

  736. #if !defined(PNG_NO_IO_STATE) && !defined(PNG_IO_STATE_SUPPORTED)

  737. #  define PNG_IO_STATE_SUPPORTED

  738. #endif

  739. 

  740. #ifndef PNG_LITERAL_SHARP

  741. #  define PNG_LITERAL_SHARP 0x23

  742. #endif

  743. #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET

  744. #  define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b

  745. #endif

  746. #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET

  747. #  define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d

  748. #endif

  749. #ifndef PNG_STRING_NEWLINE

  750. #define PNG_STRING_NEWLINE "\n"

  751. #endif

  752. 

  753. /* These are currently experimental features, define them if you want */

  754. 

  755. /* Very little testing */

  756. /*

  757. #ifdef PNG_READ_SUPPORTED

  758. #  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED

  759. #    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED

  760. #  endif

  761. #endif

  762. */

  763. 

  764. /* This is only for PowerPC big-endian and 680x0 systems */

  765. /* some testing */

  766. /*

  767. #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED

  768. #  define PNG_READ_BIG_ENDIAN_SUPPORTED

  769. #endif

  770. */

  771. 

  772. #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)

  773. #  define PNG_USE_READ_MACROS

  774. #endif

  775. 

  776. /* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */

  777. 

  778. #if !defined(PNG_NO_POINTER_INDEXING) && \

  779.     !defined(PNG_POINTER_INDEXING_SUPPORTED)

  780. #  define PNG_POINTER_INDEXING_SUPPORTED

  781. #endif

  782. 

  783. 

  784. /* Any chunks you are not interested in, you can undef here.  The

  785.  * ones that allocate memory may be expecially important (hIST,

  786.  * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info

  787.  * a bit smaller.

  788.  */

  789. 

  790. /* The size of the png_text structure changed in libpng-1.0.6 when

  791.  * iTXt support was added.  iTXt support was turned off by default through

  792.  * libpng-1.2.x, to support old apps that malloc the png_text structure

  793.  * instead of calling png_set_text() and letting libpng malloc it.  It

  794.  * was turned on by default in libpng-1.4.0.

  795.  */

  796. 

  797. /* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */

  798. #if defined(PNG_READ_SUPPORTED) && \

  799.     !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \

  800.     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)

  801. #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED

  802. #endif

  803. 

  804. /* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */

  805. #if defined(PNG_WRITE_SUPPORTED) && \

  806.     !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \

  807.     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)

  808. #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED

  809. #endif

  810. 

  811. #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED

  812. 

  813. #ifdef PNG_NO_READ_TEXT

  814. #  define PNG_NO_READ_iTXt

  815. #  define PNG_NO_READ_tEXt

  816. #  define PNG_NO_READ_zTXt

  817. #endif

  818. 

  819. #ifndef PNG_NO_READ_bKGD

  820. #  define PNG_READ_bKGD_SUPPORTED

  821. #  define PNG_bKGD_SUPPORTED

  822. #endif

  823. #ifndef PNG_NO_READ_cHRM

  824. #  define PNG_READ_cHRM_SUPPORTED

  825. #  define PNG_cHRM_SUPPORTED

  826. #endif

  827. #ifndef PNG_NO_READ_gAMA

  828. #  define PNG_READ_gAMA_SUPPORTED

  829. #  define PNG_gAMA_SUPPORTED

  830. #endif

  831. #ifndef PNG_NO_READ_hIST

  832. #  define PNG_READ_hIST_SUPPORTED

  833. #  define PNG_hIST_SUPPORTED

  834. #endif

  835. #ifndef PNG_NO_READ_iCCP

  836. #  define PNG_READ_iCCP_SUPPORTED

  837. #  define PNG_iCCP_SUPPORTED

  838. #endif

  839. #ifndef PNG_NO_READ_iTXt

  840. #  ifndef PNG_READ_iTXt_SUPPORTED

  841. #    define PNG_READ_iTXt_SUPPORTED

  842. #  endif

  843. #  ifndef PNG_iTXt_SUPPORTED

  844. #    define PNG_iTXt_SUPPORTED

  845. #  endif

  846. #endif

  847. #ifndef PNG_NO_READ_oFFs

  848. #  define PNG_READ_oFFs_SUPPORTED

  849. #  define PNG_oFFs_SUPPORTED

  850. #endif

  851. #ifndef PNG_NO_READ_pCAL

  852. #  define PNG_READ_pCAL_SUPPORTED

  853. #  define PNG_pCAL_SUPPORTED

  854. #endif

  855. #ifndef PNG_NO_READ_sCAL

  856. #  define PNG_READ_sCAL_SUPPORTED

  857. #  define PNG_sCAL_SUPPORTED

  858. #endif

  859. #ifndef PNG_NO_READ_pHYs

  860. #  define PNG_READ_pHYs_SUPPORTED

  861. #  define PNG_pHYs_SUPPORTED

  862. #endif

  863. #ifndef PNG_NO_READ_sBIT

  864. #  define PNG_READ_sBIT_SUPPORTED

  865. #  define PNG_sBIT_SUPPORTED

  866. #endif

  867. #ifndef PNG_NO_READ_sPLT

  868. #  define PNG_READ_sPLT_SUPPORTED

  869. #  define PNG_sPLT_SUPPORTED

  870. #endif

  871. #ifndef PNG_NO_READ_sRGB

  872. #  define PNG_READ_sRGB_SUPPORTED

  873. #  define PNG_sRGB_SUPPORTED

  874. #endif

  875. #ifndef PNG_NO_READ_tEXt

  876. #  define PNG_READ_tEXt_SUPPORTED

  877. #  define PNG_tEXt_SUPPORTED

  878. #endif

  879. #ifndef PNG_NO_READ_tIME

  880. #  define PNG_READ_tIME_SUPPORTED

  881. #  define PNG_tIME_SUPPORTED

  882. #endif

  883. #ifndef PNG_NO_READ_tRNS

  884. #  define PNG_READ_tRNS_SUPPORTED

  885. #  define PNG_tRNS_SUPPORTED

  886. #endif

  887. #ifndef PNG_NO_READ_zTXt

  888. #  define PNG_READ_zTXt_SUPPORTED

  889. #  define PNG_zTXt_SUPPORTED

  890. #endif

  891. #ifndef PNG_NO_READ_OPT_PLTE

  892. #  define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */

  893. #endif                      /* optional PLTE chunk in RGB and RGBA images */

  894. #if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \

  895.     defined(PNG_READ_zTXt_SUPPORTED)

  896. #  define PNG_READ_TEXT_SUPPORTED

  897. #  define PNG_TEXT_SUPPORTED

  898. #endif

  899. 

  900. #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */

  901. 

  902. #ifndef PNG_NO_READ_UNKNOWN_CHUNKS

  903. #  ifndef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED

  904. #    define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED

  905. #  endif

  906. #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED

  907. #    define PNG_UNKNOWN_CHUNKS_SUPPORTED

  908. #  endif

  909. #  ifndef PNG_READ_USER_CHUNKS_SUPPORTED

  910. #    define PNG_READ_USER_CHUNKS_SUPPORTED

  911. #  endif

  912. #endif

  913. #ifndef PNG_NO_READ_USER_CHUNKS

  914. #  ifndef PNG_READ_USER_CHUNKS_SUPPORTED

  915. #    define PNG_READ_USER_CHUNKS_SUPPORTED

  916. #  endif

  917. #  ifndef PNG_USER_CHUNKS_SUPPORTED

  918. #    define PNG_USER_CHUNKS_SUPPORTED

  919. #  endif

  920. #endif

  921. #ifndef PNG_NO_HANDLE_AS_UNKNOWN

  922. #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED

  923. #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED

  924. #  endif

  925. #endif

  926. 

  927. #ifdef PNG_WRITE_SUPPORTED

  928. #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED

  929. 

  930. #ifdef PNG_NO_WRITE_TEXT

  931. #  define PNG_NO_WRITE_iTXt

  932. #  define PNG_NO_WRITE_tEXt

  933. #  define PNG_NO_WRITE_zTXt

  934. #endif

  935. #ifndef PNG_NO_WRITE_bKGD

  936. #  define PNG_WRITE_bKGD_SUPPORTED

  937. #  ifndef PNG_bKGD_SUPPORTED

  938. #    define PNG_bKGD_SUPPORTED

  939. #  endif

  940. #endif

  941. #ifndef PNG_NO_WRITE_cHRM

  942. #  define PNG_WRITE_cHRM_SUPPORTED

  943. #  ifndef PNG_cHRM_SUPPORTED

  944. #    define PNG_cHRM_SUPPORTED

  945. #  endif

  946. #endif

  947. #ifndef PNG_NO_WRITE_gAMA

  948. #  define PNG_WRITE_gAMA_SUPPORTED

  949. #  ifndef PNG_gAMA_SUPPORTED

  950. #    define PNG_gAMA_SUPPORTED

  951. #  endif

  952. #endif

  953. #ifndef PNG_NO_WRITE_hIST

  954. #  define PNG_WRITE_hIST_SUPPORTED

  955. #  ifndef PNG_hIST_SUPPORTED

  956. #    define PNG_hIST_SUPPORTED

  957. #  endif

  958. #endif

  959. #ifndef PNG_NO_WRITE_iCCP

  960. #  define PNG_WRITE_iCCP_SUPPORTED

  961. #  ifndef PNG_iCCP_SUPPORTED

  962. #    define PNG_iCCP_SUPPORTED

  963. #  endif

  964. #endif

  965. #ifndef PNG_NO_WRITE_iTXt

  966. #  ifndef PNG_WRITE_iTXt_SUPPORTED

  967. #    define PNG_WRITE_iTXt_SUPPORTED

  968. #  endif

  969. #  ifndef PNG_iTXt_SUPPORTED

  970. #    define PNG_iTXt_SUPPORTED

  971. #  endif

  972. #endif

  973. #ifndef PNG_NO_WRITE_oFFs

  974. #  define PNG_WRITE_oFFs_SUPPORTED

  975. #  ifndef PNG_oFFs_SUPPORTED

  976. #    define PNG_oFFs_SUPPORTED

  977. #  endif

  978. #endif

  979. #ifndef PNG_NO_WRITE_pCAL

  980. #  define PNG_WRITE_pCAL_SUPPORTED

  981. #  ifndef PNG_pCAL_SUPPORTED

  982. #    define PNG_pCAL_SUPPORTED

  983. #  endif

  984. #endif

  985. #ifndef PNG_NO_WRITE_sCAL

  986. #  define PNG_WRITE_sCAL_SUPPORTED

  987. #  ifndef PNG_sCAL_SUPPORTED

  988. #    define PNG_sCAL_SUPPORTED

  989. #  endif

  990. #endif

  991. #ifndef PNG_NO_WRITE_pHYs

  992. #  define PNG_WRITE_pHYs_SUPPORTED

  993. #  ifndef PNG_pHYs_SUPPORTED

  994. #    define PNG_pHYs_SUPPORTED

  995. #  endif

  996. #endif

  997. #ifndef PNG_NO_WRITE_sBIT

  998. #  define PNG_WRITE_sBIT_SUPPORTED

  999. #  ifndef PNG_sBIT_SUPPORTED

  1000. #    define PNG_sBIT_SUPPORTED

  1001. #  endif

  1002. #endif

  1003. #ifndef PNG_NO_WRITE_sPLT

  1004. #  define PNG_WRITE_sPLT_SUPPORTED

  1005. #  ifndef PNG_sPLT_SUPPORTED

  1006. #    define PNG_sPLT_SUPPORTED

  1007. #  endif

  1008. #endif

  1009. #ifndef PNG_NO_WRITE_sRGB

  1010. #  define PNG_WRITE_sRGB_SUPPORTED

  1011. #  ifndef PNG_sRGB_SUPPORTED

  1012. #    define PNG_sRGB_SUPPORTED

  1013. #  endif

  1014. #endif

  1015. #ifndef PNG_NO_WRITE_tEXt

  1016. #  define PNG_WRITE_tEXt_SUPPORTED

  1017. #  ifndef PNG_tEXt_SUPPORTED

  1018. #    define PNG_tEXt_SUPPORTED

  1019. #  endif

  1020. #endif

  1021. #ifndef PNG_NO_WRITE_tIME

  1022. #  define PNG_WRITE_tIME_SUPPORTED

  1023. #  ifndef PNG_tIME_SUPPORTED

  1024. #    define PNG_tIME_SUPPORTED

  1025. #  endif

  1026. #endif

  1027. #ifndef PNG_NO_WRITE_tRNS

  1028. #  define PNG_WRITE_tRNS_SUPPORTED

  1029. #  ifndef PNG_tRNS_SUPPORTED

  1030. #    define PNG_tRNS_SUPPORTED

  1031. #  endif

  1032. #endif

  1033. #ifndef PNG_NO_WRITE_zTXt

  1034. #  define PNG_WRITE_zTXt_SUPPORTED

  1035. #  ifndef PNG_zTXt_SUPPORTED

  1036. #    define PNG_zTXt_SUPPORTED

  1037. #  endif

  1038. #endif

  1039. #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \

  1040.     defined(PNG_WRITE_zTXt_SUPPORTED)

  1041. #  define PNG_WRITE_TEXT_SUPPORTED

  1042. #  ifndef PNG_TEXT_SUPPORTED

  1043. #    define PNG_TEXT_SUPPORTED

  1044. #  endif

  1045. #endif

  1046. 

  1047. #ifdef PNG_WRITE_tIME_SUPPORTED

  1048. #  ifndef PNG_NO_CONVERT_tIME

  1049. #    ifndef _WIN32_WCE

  1050. /*   The "tm" structure is not supported on WindowsCE */

  1051. #      ifndef PNG_CONVERT_tIME_SUPPORTED

  1052. #        define PNG_CONVERT_tIME_SUPPORTED

  1053. #      endif

  1054. #   endif

  1055. #  endif

  1056. #endif

  1057. 

  1058. #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */

  1059. 

  1060. #ifndef PNG_NO_WRITE_FILTER

  1061. #  ifndef PNG_WRITE_FILTER_SUPPORTED

  1062. #    define PNG_WRITE_FILTER_SUPPORTED

  1063. #  endif

  1064. #endif

  1065. 

  1066. #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS

  1067. #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED

  1068. #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED

  1069. #    define PNG_UNKNOWN_CHUNKS_SUPPORTED

  1070. #  endif

  1071. #endif

  1072. #ifndef PNG_NO_HANDLE_AS_UNKNOWN

  1073. #  ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED

  1074. #    define PNG_HANDLE_AS_UNKNOWN_SUPPORTED

  1075. #  endif

  1076. #endif

  1077. #endif /* PNG_WRITE_SUPPORTED */

  1078. 

  1079. /* Turn this off to disable png_read_png() and

  1080.  * png_write_png() and leave the row_pointers member

  1081.  * out of the info structure.

  1082.  */

  1083. #ifndef PNG_NO_INFO_IMAGE

  1084. #  define PNG_INFO_IMAGE_SUPPORTED

  1085. #endif

  1086. 

  1087. /* Need the time information for converting tIME chunks */

  1088. #ifdef PNG_CONVERT_tIME_SUPPORTED

  1089.      /* "time.h" functions are not supported on WindowsCE */

  1090. #    include <time.h>

  1091. #endif

  1092. 

  1093. /* Some typedefs to get us started.  These should be safe on most of the

  1094.  * common platforms.  The typedefs should be at least as large as the

  1095.  * numbers suggest (a png_uint_32 must be at least 32 bits long), but they

  1096.  * don't have to be exactly that size.  Some compilers dislike passing

  1097.  * unsigned shorts as function parameters, so you may be better off using

  1098.  * unsigned int for png_uint_16.

  1099.  */

  1100. 

  1101. #if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL)

  1102. typedef unsigned int png_uint_32;

  1103. typedef int png_int_32;

  1104. #else

  1105. typedef unsigned long png_uint_32;

  1106. typedef long png_int_32;

  1107. #endif

  1108. typedef unsigned short png_uint_16;

  1109. typedef short png_int_16;

  1110. typedef unsigned char png_byte;

  1111. 

  1112. #ifdef PNG_NO_SIZE_T

  1113.    typedef unsigned int png_size_t;

  1114. #else

  1115.    typedef size_t png_size_t;

  1116. #endif

  1117. #define png_sizeof(x) sizeof(x)

  1118. 

  1119. /* The following is needed for medium model support.  It cannot be in the

  1120.  * pngpriv.h header.  Needs modification for other compilers besides

  1121.  * MSC.  Model independent support declares all arrays and pointers to be

  1122.  * large using the far keyword.  The zlib version used must also support

  1123.  * model independent data.  As of version zlib 1.0.4, the necessary changes

  1124.  * have been made in zlib.  The USE_FAR_KEYWORD define triggers other

  1125.  * changes that are needed. (Tim Wegner)

  1126.  */

  1127. 

  1128. /* Separate compiler dependencies (problem here is that zlib.h always

  1129.  * defines FAR. (SJT)

  1130.  */

  1131. #ifdef __BORLANDC__

  1132. #  if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__)

  1133. #    define LDATA 1

  1134. #  else

  1135. #    define LDATA 0

  1136. #  endif

  1137.    /* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */

  1138. #  if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)

  1139. #    define PNG_MAX_MALLOC_64K

  1140. #    if (LDATA != 1)

  1141. #      ifndef FAR

  1142. #        define FAR __far

  1143. #      endif

  1144. #      define USE_FAR_KEYWORD

  1145. #    endif   /* LDATA != 1 */

  1146.      /* Possibly useful for moving data out of default segment.

  1147.       * Uncomment it if you want. Could also define FARDATA as

  1148.       * const if your compiler supports it. (SJT)

  1149. #    define FARDATA FAR

  1150.       */

  1151. #  endif  /* __WIN32__, __FLAT__, __CYGWIN__ */

  1152. #endif   /* __BORLANDC__ */

  1153. 

  1154. 

  1155. /* Suggest testing for specific compiler first before testing for

  1156.  * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,

  1157.  * making reliance oncertain keywords suspect. (SJT)

  1158.  */

  1159. 

  1160. /* MSC Medium model */

  1161. #ifdef FAR

  1162. #  ifdef M_I86MM

  1163. #    define USE_FAR_KEYWORD

  1164. #    define FARDATA FAR

  1165. #    include <dos.h>

  1166. #  endif

  1167. #endif

  1168. 

  1169. /* SJT: default case */

  1170. #ifndef FAR

  1171. #  define FAR

  1172. #endif

  1173. 

  1174. /* At this point FAR is always defined */

  1175. #ifndef FARDATA

  1176. #  define FARDATA

  1177. #endif

  1178. 

  1179. /* Typedef for floating-point numbers that are converted

  1180.    to fixed-point with a multiple of 100,000, e.g., int_gamma */

  1181. typedef png_int_32 png_fixed_point;

  1182. 

  1183. /* Add typedefs for pointers */

  1184. typedef void            FAR * png_voidp;

  1185. typedef png_byte        FAR * png_bytep;

  1186. typedef png_uint_32     FAR * png_uint_32p;

  1187. typedef png_int_32      FAR * png_int_32p;

  1188. typedef png_uint_16     FAR * png_uint_16p;

  1189. typedef png_int_16      FAR * png_int_16p;

  1190. typedef PNG_CONST char  FAR * png_const_charp;

  1191. typedef char            FAR * png_charp;

  1192. typedef png_fixed_point FAR * png_fixed_point_p;

  1193. 

  1194. #ifndef PNG_NO_STDIO

  1195. typedef FILE                * png_FILE_p;

  1196. #endif

  1197. 

  1198. #ifdef PNG_FLOATING_POINT_SUPPORTED

  1199. typedef double          FAR * png_doublep;

  1200. #endif

  1201. 

  1202. /* Pointers to pointers; i.e. arrays */

  1203. typedef png_byte        FAR * FAR * png_bytepp;

  1204. typedef png_uint_32     FAR * FAR * png_uint_32pp;

  1205. typedef png_int_32      FAR * FAR * png_int_32pp;

  1206. typedef png_uint_16     FAR * FAR * png_uint_16pp;

  1207. typedef png_int_16      FAR * FAR * png_int_16pp;

  1208. typedef PNG_CONST char  FAR * FAR * png_const_charpp;

  1209. typedef char            FAR * FAR * png_charpp;

  1210. typedef png_fixed_point FAR * FAR * png_fixed_point_pp;

  1211. #ifdef PNG_FLOATING_POINT_SUPPORTED

  1212. typedef double          FAR * FAR * png_doublepp;

  1213. #endif

  1214. 

  1215. /* Pointers to pointers to pointers; i.e., pointer to array */

  1216. typedef char            FAR * FAR * FAR * png_charppp;

  1217. 

  1218. /* Define PNG_BUILD_DLL if the module being built is a Windows

  1219.  * LIBPNG DLL.

  1220.  *

  1221.  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.

  1222.  * It is equivalent to Microsoft predefined macro _DLL that is

  1223.  * automatically defined when you compile using the share

  1224.  * version of the CRT (C Run-Time library)

  1225.  *

  1226.  * The cygwin mods make this behavior a little different:

  1227.  * Define PNG_BUILD_DLL if you are building a dll for use with cygwin

  1228.  * Define PNG_STATIC if you are building a static library for use with cygwin,

  1229.  *   -or- if you are building an application that you want to link to the

  1230.  *   static library.

  1231.  * PNG_USE_DLL is defined by default (no user action needed) unless one of

  1232.  *   the other flags is defined.

  1233.  */

  1234. 

  1235. #if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))

  1236. #  define PNG_DLL

  1237. #endif

  1238. 

  1239. #ifdef __CYGWIN__

  1240. #  undef PNGAPI

  1241. #  define PNGAPI __cdecl

  1242. #  undef PNG_IMPEXP

  1243. #  define PNG_IMPEXP

  1244. #endif

  1245. 

  1246. #define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */

  1247. 

  1248. /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",

  1249.  * you may get warnings regarding the linkage of png_zalloc and png_zfree.

  1250.  * Don't ignore those warnings; you must also reset the default calling

  1251.  * convention in your compiler to match your PNGAPI, and you must build

  1252.  * zlib and your applications the same way you build libpng.

  1253.  */

  1254. 

  1255. #if defined(__MINGW32__) && !defined(PNG_MODULEDEF)

  1256. #  ifndef PNG_NO_MODULEDEF

  1257. #    define PNG_NO_MODULEDEF

  1258. #  endif

  1259. #endif

  1260. 

  1261. #if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)

  1262. #  define PNG_IMPEXP

  1263. #endif

  1264. 

  1265. #if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \

  1266.     (( defined(_Windows) || defined(_WINDOWS) || \

  1267.        defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))

  1268. 

  1269. #  ifndef PNGAPI

  1270. #     if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))

  1271. #        define PNGAPI __cdecl

  1272. #     else

  1273. #        define PNGAPI _cdecl

  1274. #     endif

  1275. #  endif

  1276. 

  1277. #  if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \

  1278.        0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)

  1279. #     define PNG_IMPEXP

  1280. #  endif

  1281. 

  1282. #  ifndef PNG_IMPEXP

  1283. 

  1284. #    define PNG_EXPORT_TYPE1(type,symbol)  PNG_IMPEXP type PNGAPI symbol

  1285. #    define PNG_EXPORT_TYPE2(type,symbol)  type PNG_IMPEXP PNGAPI symbol

  1286. 

  1287.      /* Borland/Microsoft */

  1288. #    if defined(_MSC_VER) || defined(__BORLANDC__)

  1289. #      if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)

  1290. #         define PNG_EXPORT PNG_EXPORT_TYPE1

  1291. #      else

  1292. #         define PNG_EXPORT PNG_EXPORT_TYPE2

  1293. #         ifdef PNG_BUILD_DLL

  1294. #            define PNG_IMPEXP __export

  1295. #         else

  1296. #            define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */

  1297. #         endif                              /* Exists in Borland C++ for

  1298.                                                 C++ classes (== huge) */

  1299. #      endif

  1300. #    endif

  1301. 

  1302. #    ifndef PNG_IMPEXP

  1303. #      ifdef PNG_BUILD_DLL

  1304. #        define PNG_IMPEXP __declspec(dllexport)

  1305. #      else

  1306. #        define PNG_IMPEXP __declspec(dllimport)

  1307. #      endif

  1308. #    endif

  1309. #  endif  /* PNG_IMPEXP */

  1310. #else /* !(DLL || non-cygwin WINDOWS) */

  1311. #   if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)

  1312. #     ifndef PNGAPI

  1313. #       define PNGAPI _System

  1314. #     endif

  1315. #   else

  1316. #     if 0 /* ... other platforms, with other meanings */

  1317. #     endif

  1318. #   endif

  1319. #endif

  1320. 

  1321. #ifndef PNGAPI

  1322. #  define PNGAPI

  1323. #endif

  1324. #ifndef PNG_IMPEXP

  1325. #  define PNG_IMPEXP

  1326. #endif

  1327. 

  1328. #ifdef PNG_BUILDSYMS

  1329. #  ifndef PNG_EXPORT

  1330. #    define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END

  1331. #  endif

  1332. #endif

  1333. 

  1334. #ifndef PNG_EXPORT

  1335. #  define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol

  1336. #endif

  1337. 

  1338. /* Support for compiler specific function attributes.  These are used

  1339.  * so that where compiler support is available incorrect use of API

  1340.  * functions in png.h will generate compiler warnings.

  1341.  *

  1342.  * Added at libpng-1.2.41.

  1343.  */

  1344. 

  1345. #ifndef PNG_NO_PEDANTIC_WARNINGS

  1346. #  ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED

  1347. #    define PNG_PEDANTIC_WARNINGS_SUPPORTED

  1348. #  endif

  1349. #endif

  1350. 

  1351. #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED

  1352. /* Support for compiler specific function attributes.  These are used

  1353.  * so that where compiler support is available incorrect use of API

  1354.  * functions in png.h will generate compiler warnings.  Added at libpng

  1355.  * version 1.2.41.

  1356.  */

  1357. #  ifdef __GNUC__

  1358. #    ifndef PNG_USE_RESULT

  1359. #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))

  1360. #    endif

  1361. #    ifndef PNG_NORETURN

  1362. #      define PNG_NORETURN   __attribute__((__noreturn__))

  1363. #    endif

  1364. #    ifndef PNG_ALLOCATED

  1365. #      define PNG_ALLOCATED  __attribute__((__malloc__))

  1366. #    endif

  1367. 

  1368.     /* This specifically protects structure members that should only be

  1369.      * accessed from within the library, therefore should be empty during

  1370.      * a library build.

  1371.      */

  1372. #    ifndef PNG_DEPRECATED

  1373. #      define PNG_DEPRECATED __attribute__((__deprecated__))

  1374. #    endif

  1375. #    ifndef PNG_DEPSTRUCT

  1376. #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))

  1377. #    endif

  1378. #    ifndef PNG_PRIVATE

  1379. #      if 0 /* Doesn't work so we use deprecated instead*/

  1380. #        define PNG_PRIVATE \

  1381.           __attribute__((warning("This function is not exported by libpng.")))

  1382. #      else

  1383. #        define PNG_PRIVATE \

  1384.           __attribute__((__deprecated__))

  1385. #      endif

  1386. #    endif /* PNG_PRIVATE */

  1387. #  endif /* __GNUC__ */

  1388. #endif /* PNG_PEDANTIC_WARNINGS */

  1389. 

  1390. #ifndef PNG_DEPRECATED

  1391. #  define PNG_DEPRECATED  /* Use of this function is deprecated */

  1392. #endif

  1393. #ifndef PNG_USE_RESULT

  1394. #  define PNG_USE_RESULT  /* The result of this function must be checked */

  1395. #endif

  1396. #ifndef PNG_NORETURN

  1397. #  define PNG_NORETURN    /* This function does not return */

  1398. #endif

  1399. #ifndef PNG_ALLOCATED

  1400. #  define PNG_ALLOCATED   /* The result of the function is new memory */

  1401. #endif

  1402. #ifndef PNG_DEPSTRUCT

  1403. #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */

  1404. #endif

  1405. #ifndef PNG_PRIVATE

  1406. #  define PNG_PRIVATE     /* This is a private libpng function */

  1407. #endif

  1408. 

  1409. /* Users may want to use these so they are not private.  Any library

  1410.  * functions that are passed far data must be model-independent.

  1411.  */

  1412. 

  1413. /* memory model/platform independent fns */

  1414. #ifndef PNG_ABORT

  1415. #  ifdef _WINDOWS_

  1416. #     define PNG_ABORT() ExitProcess(0)

  1417. #  else

  1418. #     define PNG_ABORT() abort()

  1419. #  endif

  1420. #endif

  1421. 

  1422. #ifdef USE_FAR_KEYWORD

  1423. /* Use this to make far-to-near assignments */

  1424. #  define CHECK   1

  1425. #  define NOCHECK 0

  1426. #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))

  1427. #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))

  1428. #  define png_strcpy  _fstrcpy

  1429. #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */

  1430. #  define png_strlen  _fstrlen

  1431. #  define png_memcmp  _fmemcmp    /* SJT: added */

  1432. #  define png_memcpy  _fmemcpy

  1433. #  define png_memset  _fmemset

  1434. #  define png_sprintf sprintf

  1435. #else

  1436. #  ifdef _WINDOWS_  /* Favor Windows over C runtime fns */

  1437. #    define CVT_PTR(ptr)         (ptr)

  1438. #    define CVT_PTR_NOCHECK(ptr) (ptr)

  1439. #    define png_strcpy  lstrcpyA

  1440. #    define png_strncpy lstrcpynA

  1441. #    define png_strlen  lstrlenA

  1442. #    define png_memcmp  memcmp

  1443. #    define png_memcpy  CopyMemory

  1444. #    define png_memset  memset

  1445. #    define png_sprintf wsprintfA

  1446. #  else

  1447. #    define CVT_PTR(ptr)         (ptr)

  1448. #    define CVT_PTR_NOCHECK(ptr) (ptr)

  1449. #    define png_strcpy  strcpy

  1450. #    define png_strncpy strncpy     /* Added to v 1.2.6 */

  1451. #    define png_strlen  strlen

  1452. #    define png_memcmp  memcmp      /* SJT: added */

  1453. #    define png_memcpy  memcpy

  1454. #    define png_memset  memset

  1455. #    define png_sprintf sprintf

  1456. #    ifndef PNG_NO_SNPRINTF

  1457. #      ifdef _MSC_VER

  1458. #        define png_snprintf _snprintf   /* Added to v 1.2.19 */

  1459. #        define png_snprintf2 _snprintf

  1460. #        define png_snprintf6 _snprintf

  1461. #      else

  1462. #        define png_snprintf snprintf   /* Added to v 1.2.19 */

  1463. #        define png_snprintf2 snprintf

  1464. #        define png_snprintf6 snprintf

  1465. #      endif

  1466. #    else

  1467.        /* You don't have or don't want to use snprintf().  Caution: Using

  1468.         * sprintf instead of snprintf exposes your application to accidental

  1469.         * or malevolent buffer overflows.  If you don't have snprintf()

  1470.         * as a general rule you should provide one (you can get one from

  1471.         * Portable OpenSSH).

  1472.         */

  1473. #      define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1)

  1474. #      define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2)

  1475. #      define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \

  1476.           sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)

  1477. #    endif

  1478. #  endif

  1479. #endif

  1480. 

  1481. /* png_alloc_size_t is guaranteed to be no smaller than png_size_t,

  1482.  * and no smaller than png_uint_32.  Casts from png_size_t or png_uint_32

  1483.  * to png_alloc_size_t are not necessary; in fact, it is recommended

  1484.  * not to use them at all so that the compiler can complain when something

  1485.  * turns out to be problematic.

  1486.  * Casts in the other direction (from png_alloc_size_t to png_size_t or

  1487.  * png_uint_32) should be explicitly applied; however, we do not expect

  1488.  * to encounter practical situations that require such conversions.

  1489.  */

  1490. #if defined(__TURBOC__) && !defined(__FLAT__)

  1491. #  define  png_mem_alloc farmalloc

  1492. #  define  png_mem_free  farfree

  1493.    typedef unsigned long png_alloc_size_t;

  1494. #else

  1495. #  if defined(_MSC_VER) && defined(MAXSEG_64K)

  1496. #    define  png_mem_alloc(s) halloc(s, 1)

  1497. #    define  png_mem_free     hfree

  1498.      typedef unsigned long    png_alloc_size_t;

  1499. #  else

  1500. #    if defined(_WINDOWS_) && (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL)

  1501. #      define  png_mem_alloc(s) HeapAlloc(GetProcessHeap(), 0, s)

  1502. #      define  png_mem_free(p)  HeapFree(GetProcessHeap(), 0, p)

  1503.        typedef DWORD            png_alloc_size_t;

  1504. #    else

  1505. #      define  png_mem_alloc malloc

  1506. #      define  png_mem_free  free

  1507.        typedef png_size_t    png_alloc_size_t;

  1508. #    endif

  1509. #  endif

  1510. #endif

  1511. /* End of memory model/platform independent support */

  1512. 

  1513. /* Just a little check that someone hasn't tried to define something

  1514.  * contradictory.

  1515.  */

  1516. #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)

  1517. #  undef PNG_ZBUF_SIZE

  1518. #  define PNG_ZBUF_SIZE 65536L

  1519. #endif

  1520. 

  1521. 

  1522. /* Added at libpng-1.2.8 */

  1523. #endif /* PNG_VERSION_INFO_ONLY */

  1524. 

  1525. #endif /* PNGCONF_H */