*** empty log message ***

[wxWidgets.git] / src / png / pngconf.h

diff --git a/src/png/pngconf.h b/src/png/pngconf.h
index 675f292babdeee0892af6c179a4fd6af236aa29d..028f2a1a70cbfa642e1caa47b46ca2c48cfcb79f 100644 (file)
--- a/src/png/pngconf.h
+++ b/src/png/pngconf.h
@@ -1,12 +1,11 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
 
 /* pngconf.h - machine configurable file for libpng
  *

- * libpng 1.0.1
+ * libpng 1.0.3 - January 14, 1999

  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

- * Copyright (c) 1998, Glenn Randers-Pehrson
- * March 15, 1998
+ * Copyright (c) 1998, 1999 Glenn Randers-Pehrson

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


@@ -18,6 +17,7 @@
 #ifndef PNGCONF_H
 #define PNGCONF_H
 
 #ifndef PNGCONF_H
 #define PNGCONF_H
 

+

 /* This is the size of the compression buffer, and thus the size of
  * an IDAT chunk.  Make this whatever size you feel is best for your
  * machine.  One of these will be allocated per png_struct.  When this
 /* This is the size of the compression buffer, and thus the size of
  * an IDAT chunk.  Make this whatever size you feel is best for your
  * machine.  One of these will be allocated per png_struct.  When this


@@ -47,16 +47,31 @@
 #define PNG_MAX_MALLOC_64K
 #endif
 
 #define PNG_MAX_MALLOC_64K
 #endif
 

-/* This protects us against compilers which run on a windowing system
+/* This protects us against compilers that run on a windowing system

  * and thus don't have or would rather us not use the stdio types:
  * stdin, stdout, and stderr.  The only one currently used is stderr
  * and thus don't have or would rather us not use the stdio types:
  * stdin, stdout, and stderr.  The only one currently used is stderr

- * in png_error() and png_warning().  #defining PNG_NO_STDIO will
- * prevent these from being compiled and used.
+ * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
+ * prevent these from being compiled and used. #defining PNG_NO_STDIO
+ * will also prevent these, plus will prevent the entire set of stdio
+ * macros and functions (FILE *, printf, etc.) from being compiled and used,
+ * unless PNG_DEBUG has been #defined.
+ *
+ * #define PNG_NO_CONSOLE_IO

  * #define PNG_NO_STDIO
  */
 
  * #define PNG_NO_STDIO
  */
 

-#ifndef PNG_NO_STDIO 
-#include <stdio.h>
+#ifdef PNG_DEBUG
+#  if (PNG_DEBUG > 0)
+#    include <stdio.h>
+#  endif
+#else
+#  ifdef PNG_NO_STDIO
+#    ifndef PNG_NO_CONSOLE_IO
+#      define PNG_NO_CONSOLE_IO
+#    endif
+#  else
+#    include <stdio.h>
+#  endif

 #endif
 
 /* This macro protects us against machines that don't have function
 #endif
 
 /* This macro protects us against machines that don't have function


@@ -237,72 +252,139 @@ __dont__ include it again
 /* Any transformations you will not be using can be undef'ed here */
 
 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 /* Any transformations you will not be using can be undef'ed here */
 
 /* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user

-   to turn it off with "*TRANSFORMS_NOT_SUPPORTED" on the compile line,
-   then pick and choose which ones to define without having to edit
-   this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED if you
-   only want to have a png-compliant reader/writer but don't need
+   to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS
+   on the compile line, then pick and choose which ones to define without
+   having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED
+   if you only want to have a png-compliant reader/writer but don't need

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

-   typical installation of the library.
+   typical installation of the library. (PNG_NO_* form added in version
+   1.0.1c, for consistency)

  */
 
 
  */
 
 

-#ifndef PNG_READ_TRANSFORMS_NOT_SUPPORTED
+#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
+    !defined(PNG_NO_READ_TRANSFORMS)

 #define PNG_READ_TRANSFORMS_SUPPORTED
 #endif
 #define PNG_READ_TRANSFORMS_SUPPORTED
 #endif

-#ifndef PNG_WRITE_TRANSFORMS_NOT_SUPPORTED
+#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
+    !defined(PNG_NO_WRITE_TRANSFORMS)

 #define PNG_WRITE_TRANSFORMS_SUPPORTED
 #endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 #define PNG_WRITE_TRANSFORMS_SUPPORTED
 #endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED

+#ifndef PNG_NO_READ_EXPAND

 #define PNG_READ_EXPAND_SUPPORTED
 #define PNG_READ_EXPAND_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_SHIFT

 #define PNG_READ_SHIFT_SUPPORTED
 #define PNG_READ_SHIFT_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_PACK

 #define PNG_READ_PACK_SUPPORTED
 #define PNG_READ_PACK_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_BGR

 #define PNG_READ_BGR_SUPPORTED
 #define PNG_READ_BGR_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_SWAP

 #define PNG_READ_SWAP_SUPPORTED
 #define PNG_READ_SWAP_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_PACKSWAP

 #define PNG_READ_PACKSWAP_SUPPORTED
 #define PNG_READ_PACKSWAP_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_INVERT

 #define PNG_READ_INVERT_SUPPORTED
 #define PNG_READ_INVERT_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_DITHER

 #define PNG_READ_DITHER_SUPPORTED
 #define PNG_READ_DITHER_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_BACKGROUND

 #define PNG_READ_BACKGROUND_SUPPORTED
 #define PNG_READ_BACKGROUND_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_16_TO_8

 #define PNG_READ_16_TO_8_SUPPORTED
 #define PNG_READ_16_TO_8_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_FILLER

 #define PNG_READ_FILLER_SUPPORTED
 #define PNG_READ_FILLER_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_GAMMA

 #define PNG_READ_GAMMA_SUPPORTED
 #define PNG_READ_GAMMA_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_GRAY_TO_RGB

 #define PNG_READ_GRAY_TO_RGB_SUPPORTED
 #define PNG_READ_GRAY_TO_RGB_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_SWAP_ALPHA

 #define PNG_READ_SWAP_ALPHA_SUPPORTED
 #define PNG_READ_SWAP_ALPHA_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_INVERT_ALPHA

 #define PNG_READ_INVERT_ALPHA_SUPPORTED
 #define PNG_READ_INVERT_ALPHA_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_STRIP_ALPHA

 #define PNG_READ_STRIP_ALPHA_SUPPORTED
 #define PNG_READ_STRIP_ALPHA_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_USER_TRANSFORM

 #define PNG_READ_USER_TRANSFORM_SUPPORTED
 #define PNG_READ_USER_TRANSFORM_SUPPORTED

-/* the following aren't implemented yet
+#endif
+#ifndef PNG_NO_READ_RGB_TO_GRAY

 #define PNG_READ_RGB_TO_GRAY_SUPPORTED
 #define PNG_READ_RGB_TO_GRAY_SUPPORTED

- */
+#endif

 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 
 #endif /* PNG_READ_TRANSFORMS_SUPPORTED */
 

-#ifndef PNG_PROGRESSIVE_READ_NOT_SUPPORTED   /* if you don't do progressive   */
+#if !defined(PNG_NO_PROGRESSIVE_READ) && \
+ !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive   */

 #define PNG_PROGRESSIVE_READ_SUPPORTED       /* reading.  This is not talking */
 #endif                               /* about interlacing capability!  You'll */
               /* still have interlacing unless you change the following line: */
 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
 #define PNG_PROGRESSIVE_READ_SUPPORTED       /* reading.  This is not talking */
 #endif                               /* about interlacing capability!  You'll */
               /* still have interlacing unless you change the following line: */
 #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */

+
+#ifndef PNG_NO_READ_COMPOSITED_NODIV

 #define PNG_READ_COMPOSITE_NODIV_SUPPORTED    /* well tested on Intel and SGI */
 #define PNG_READ_COMPOSITE_NODIV_SUPPORTED    /* well tested on Intel and SGI */

+#endif

 
 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 
 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED

+#ifndef PNG_NO_WRITE_SHIFT

 #define PNG_WRITE_SHIFT_SUPPORTED
 #define PNG_WRITE_SHIFT_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_PACK

 #define PNG_WRITE_PACK_SUPPORTED
 #define PNG_WRITE_PACK_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_BGR

 #define PNG_WRITE_BGR_SUPPORTED
 #define PNG_WRITE_BGR_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_SWAP

 #define PNG_WRITE_SWAP_SUPPORTED
 #define PNG_WRITE_SWAP_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_PACKSWAP

 #define PNG_WRITE_PACKSWAP_SUPPORTED
 #define PNG_WRITE_PACKSWAP_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_INVERT

 #define PNG_WRITE_INVERT_SUPPORTED
 #define PNG_WRITE_INVERT_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_FILLER

 #define PNG_WRITE_FILLER_SUPPORTED  /* This is the same as WRITE_STRIP_ALPHA */
 #define PNG_WRITE_FILLER_SUPPORTED  /* This is the same as WRITE_STRIP_ALPHA */

-#define PNG_WRITE_FLUSH_SUPPORTED
+#endif
+#ifndef PNG_NO_WRITE_SWAP_ALPHA

 #define PNG_WRITE_SWAP_ALPHA_SUPPORTED
 #define PNG_WRITE_SWAP_ALPHA_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_INVERT_ALPHA

 #define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 #define PNG_WRITE_INVERT_ALPHA_SUPPORTED

-#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#endif
+#ifndef PNG_NO_WRITE_USER_TRANSFORM

 #define PNG_WRITE_USER_TRANSFORM_SUPPORTED
 #define PNG_WRITE_USER_TRANSFORM_SUPPORTED

+#endif

 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 
 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
                                             encoders, but can cause trouble
                                             if left undefined */
 
 #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
 
 #define PNG_WRITE_INTERLACING_SUPPORTED  /* not required for PNG-compliant
                                             encoders, but can cause trouble
                                             if left undefined */
 

-#if !defined(PNG_NO_STDIO)
+#ifndef PNG_NO_WRITE_WEIGHTED_FILTER
+#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#endif
+
+#ifndef PNG_NO_WRITE_FLUSH
+#define PNG_WRITE_FLUSH_SUPPORTED
+#endif
+
+#ifndef PNG_NO_STDIO

 #define PNG_TIME_RFC1123_SUPPORTED
 #endif
 
 #define PNG_TIME_RFC1123_SUPPORTED
 #endif
 


@@ -322,7 +404,7 @@ __dont__ include it again
  * png_get_x_offset_microns()
  * png_get_y_offset_microns()
  */
  * png_get_x_offset_microns()
  * png_get_y_offset_microns()
  */

-#if !defined(PNG_NO_EASY_ACCESS)
+#ifndef PNG_NO_EASY_ACCESS

 #define PNG_EASY_ACCESS_SUPPORTED
 #endif
 
 #define PNG_EASY_ACCESS_SUPPORTED
 #endif
 


@@ -331,6 +413,7 @@ __dont__ include it again
 /* very little testing */
 /*
 #define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 /* very little testing */
 /*
 #define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED

+#define PNG_USER_MEM_SUPPORTED

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


@@ -351,45 +434,100 @@ __dont__ include it again
  * a bit smaller.
  */
 
  * a bit smaller.
  */
 

-#ifndef PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED
+#if !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
+    !defined(PNG_NO_READ_ANCILLARY_CHUNKS)

 #define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 #endif
 #define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 #endif

-#ifndef PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED
+#if !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
+    !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)

 #define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 #endif
 
 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 #define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 #endif
 
 #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED

+#ifndef PNG_NO_READ_bKGD

 #define PNG_READ_bKGD_SUPPORTED
 #define PNG_READ_bKGD_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_cHRM

 #define PNG_READ_cHRM_SUPPORTED
 #define PNG_READ_cHRM_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_gAMA

 #define PNG_READ_gAMA_SUPPORTED
 #define PNG_READ_gAMA_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_hIST

 #define PNG_READ_hIST_SUPPORTED
 #define PNG_READ_hIST_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_oFFs

 #define PNG_READ_oFFs_SUPPORTED
 #define PNG_READ_oFFs_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_pCAL

 #define PNG_READ_pCAL_SUPPORTED
 #define PNG_READ_pCAL_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_pHYs

 #define PNG_READ_pHYs_SUPPORTED
 #define PNG_READ_pHYs_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_sBIT

 #define PNG_READ_sBIT_SUPPORTED
 #define PNG_READ_sBIT_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_sRGB

 #define PNG_READ_sRGB_SUPPORTED
 #define PNG_READ_sRGB_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_tEXt

 #define PNG_READ_tEXt_SUPPORTED
 #define PNG_READ_tEXt_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_tIME

 #define PNG_READ_tIME_SUPPORTED
 #define PNG_READ_tIME_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_tRNS

 #define PNG_READ_tRNS_SUPPORTED
 #define PNG_READ_tRNS_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_zTXt

 #define PNG_READ_zTXt_SUPPORTED
 #define PNG_READ_zTXt_SUPPORTED

+#endif
+#ifndef PNG_NO_READ_OPT_PLTE

 #define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the optional */
 #define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the optional */

-                                    /* PLTE chunk in RGB and RGBA images */
+#endif                              /* PLTE chunk in RGB and RGBA images */

 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 
 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
 
 #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED

+#ifndef PNG_NO_WRITE_bKGD

 #define PNG_WRITE_bKGD_SUPPORTED
 #define PNG_WRITE_bKGD_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_cHRM

 #define PNG_WRITE_cHRM_SUPPORTED
 #define PNG_WRITE_cHRM_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_gAMA

 #define PNG_WRITE_gAMA_SUPPORTED
 #define PNG_WRITE_gAMA_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_hIST

 #define PNG_WRITE_hIST_SUPPORTED
 #define PNG_WRITE_hIST_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_oFFs

 #define PNG_WRITE_oFFs_SUPPORTED
 #define PNG_WRITE_oFFs_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_pCAL

 #define PNG_WRITE_pCAL_SUPPORTED
 #define PNG_WRITE_pCAL_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_pHYs

 #define PNG_WRITE_pHYs_SUPPORTED
 #define PNG_WRITE_pHYs_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_sBIT

 #define PNG_WRITE_sBIT_SUPPORTED
 #define PNG_WRITE_sBIT_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_sRGB

 #define PNG_WRITE_sRGB_SUPPORTED
 #define PNG_WRITE_sRGB_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_tEXt

 #define PNG_WRITE_tEXt_SUPPORTED
 #define PNG_WRITE_tEXt_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_tIME

 #define PNG_WRITE_tIME_SUPPORTED
 #define PNG_WRITE_tIME_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_tRNS

 #define PNG_WRITE_tRNS_SUPPORTED
 #define PNG_WRITE_tRNS_SUPPORTED

+#endif
+#ifndef PNG_NO_WRITE_zTXt

 #define PNG_WRITE_zTXt_SUPPORTED
 #define PNG_WRITE_zTXt_SUPPORTED

+#endif

 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
 
 /* need the time information for reading tIME chunks */
 #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
 
 /* need the time information for reading tIME chunks */


@@ -507,7 +645,7 @@ typedef char            FAR * FAR * FAR * png_charppp;
  */
 typedef charf *         png_zcharp;
 typedef charf * FAR *   png_zcharpp;
  */
 typedef charf *         png_zcharp;
 typedef charf * FAR *   png_zcharpp;

-typedef z_stream FAR *  png_zstreamp; 
+typedef z_stream FAR *  png_zstreamp;

 
 /* allow for compilation as dll under MS Windows */
 #ifdef __WIN32DLL__
 
 /* allow for compilation as dll under MS Windows */
 #ifdef __WIN32DLL__


@@ -539,6 +677,7 @@ typedef z_stream FAR *  png_zstreamp;
 #   define NOCHECK 0
 #   define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
 #   define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
 #   define NOCHECK 0
 #   define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
 #   define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))

+#   define png_strcpy _fstrcpy

 #   define png_strlen _fstrlen
 #   define png_memcmp _fmemcmp      /* SJT: added */
 #   define png_memcpy _fmemcpy
 #   define png_strlen _fstrlen
 #   define png_memcmp _fmemcmp      /* SJT: added */
 #   define png_memcpy _fmemcpy


@@ -546,6 +685,7 @@ typedef z_stream FAR *  png_zstreamp;
 #else /* use the usual functions */
 #   define CVT_PTR(ptr)         (ptr)
 #   define CVT_PTR_NOCHECK(ptr) (ptr)
 #else /* use the usual functions */
 #   define CVT_PTR(ptr)         (ptr)
 #   define CVT_PTR_NOCHECK(ptr) (ptr)

+#   define png_strcpy strcpy

 #   define png_strlen strlen
 #   define png_memcmp memcmp     /* SJT: added */
 #   define png_memcpy memcpy
 #   define png_strlen strlen
 #   define png_memcmp memcmp     /* SJT: added */
 #   define png_memcpy memcpy


@@ -554,7 +694,7 @@ typedef z_stream FAR *  png_zstreamp;
 /* End of memory model independent support */
 
 /* Just a double check that someone hasn't tried to define something
 /* End of memory model independent support */
 
 /* Just a double check that someone hasn't tried to define something

- * contradictory. 
+ * contradictory.

  */
 #if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
 #undef PNG_ZBUF_SIZE
  */
 #if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K)
 #undef PNG_ZBUF_SIZE