clang-format all pdfium code.

samples/fx_lpng/lpng_v163/png.h

 
 /* png.h - header file for PNG reference library
  *
  * libpng version 1.6.3 - July 18, 2013
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * This code is released under the libpng license (See LICENSE, below)

[Nico, 2015/08/04 18:57:31]

Hm, I guess this file shouldn't be formatted.

[Tom Sepez, 2015/08/04 19:03:32]

Right, the samples/fx_lpng stuff is actually third party, but its used only by
this test.  So let's revert these.

  *
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
  *   libpng versions 0.97, January 1998, through 1.6.3 - July 18, 2013: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
  *
  *   Due to various miscommunications, unforeseen code incompatibilities
@@ skipping 452 matching lines @@
 #define png_set_crc_action FOXIT_png_set_crc_action
 #define png_set_filter FOXIT_png_set_filter
 #define png_set_filter_heuristics FOXIT_png_set_filter_heuristics
 #define png_set_filter_heuristics_fixed FOXIT_png_set_filter_heuristics_fixed
 #define png_set_compression_level FOXIT_png_set_compression_level
 #define png_set_compression_mem_level FOXIT_png_set_compression_mem_level
 #define png_set_compression_strategy FOXIT_png_set_compression_strategy
 #define png_set_compression_window_bits FOXIT_png_set_compression_window_bits
 #define png_set_compression_method FOXIT_png_set_compression_method
 #define png_set_text_compression_level FOXIT_png_set_text_compression_level
-#define png_set_text_compression_mem_level FOXIT_png_set_text_compression_mem_level
-#define png_set_text_compression_strategy FOXIT_png_set_text_compression_strategy
-#define png_set_text_compression_window_bits FOXIT_png_set_text_compression_window_bits
+#define png_set_text_compression_mem_level \
+  FOXIT_png_set_text_compression_mem_level
+#define png_set_text_compression_strategy \
+  FOXIT_png_set_text_compression_strategy
+#define png_set_text_compression_window_bits \
+  FOXIT_png_set_text_compression_window_bits
 #define png_set_text_compression_method FOXIT_png_set_text_compression_method
 #define png_set_error_fn FOXIT_png_set_error_fn
 #define png_get_error_ptr FOXIT_png_get_error_ptr
 #define png_set_write_fn FOXIT_png_set_write_fn
 #define png_set_read_fn FOXIT_png_set_read_fn
 #define png_set_read_status_fn FOXIT_png_set_read_status_fn
 #define png_set_write_status_fn FOXIT_png_set_write_status_fn
 #define png_set_read_user_transform_fn FOXIT_png_set_read_user_transform_fn
 #define png_set_write_user_transform_fn FOXIT_png_set_write_user_transform_fn
 #define png_set_user_transform_info FOXIT_png_set_user_transform_info
@@ skipping 142 matching lines @@
 #define png_pass_dsp_mask FOXIT_png_pass_dsp_mask
 #define png_pass_inc FOXIT_png_pass_inc
 #define png_pass_mask FOXIT_png_pass_mask
 #define png_pass_start FOXIT_png_pass_start
 #define png_pass_yinc FOXIT_png_pass_yinc
 #define png_pass_ystart FOXIT_png_pass_ystart
 #define png_set_mem_fn FOXIT_png_set_mem_fn
 
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.6.3"
-#define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.6.3 - July 18, 2013\n"
+#define PNG_HEADER_VERSION_STRING " libpng version 1.6.3 - July 18, 2013\n"
 
-#define PNG_LIBPNG_VER_SONUM   16
-#define PNG_LIBPNG_VER_DLLNUM  16
+#define PNG_LIBPNG_VER_SONUM 16
+#define PNG_LIBPNG_VER_DLLNUM 16
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
-#define PNG_LIBPNG_VER_MAJOR   1
-#define PNG_LIBPNG_VER_MINOR   6
+#define PNG_LIBPNG_VER_MAJOR 1
+#define PNG_LIBPNG_VER_MINOR 6
 #define PNG_LIBPNG_VER_RELEASE 3
 
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD 0
 
 /* Release Status */
-#define PNG_LIBPNG_BUILD_ALPHA    1
-#define PNG_LIBPNG_BUILD_BETA     2
-#define PNG_LIBPNG_BUILD_RC       3
-#define PNG_LIBPNG_BUILD_STABLE   4
+#define PNG_LIBPNG_BUILD_ALPHA 1
+#define PNG_LIBPNG_BUILD_BETA 2
+#define PNG_LIBPNG_BUILD_RC 3
+#define PNG_LIBPNG_BUILD_STABLE 4
 #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
 
 /* Release-Specific Flags */
-#define PNG_LIBPNG_BUILD_PATCH    8 /* Can be OR'ed with
-                                       PNG_LIBPNG_BUILD_STABLE only */
-#define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with
-                                       PNG_LIBPNG_BUILD_SPECIAL */
-#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
-                                       PNG_LIBPNG_BUILD_PRIVATE */
+#define PNG_LIBPNG_BUILD_PATCH \
+  8 /* Can be OR'ed with       \
+       PNG_LIBPNG_BUILD_STABLE only */
+#define PNG_LIBPNG_BUILD_PRIVATE \
+  16 /* Cannot be OR'ed with     \
+        PNG_LIBPNG_BUILD_SPECIAL */
+#define PNG_LIBPNG_BUILD_SPECIAL \
+  32 /* Cannot be OR'ed with     \
+        PNG_LIBPNG_BUILD_PRIVATE */
 
 #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
  * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
 #define PNG_LIBPNG_VER 10603 /* 1.6.3 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
  */
 #ifndef PNGLCONF_H
-    /* If pnglibconf.h is missing, you can
-     * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
-     */
-#   include "pnglibconf.h"
+/* If pnglibconf.h is missing, you can
+ * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
+ */
+#include "pnglibconf.h"
 #endif
 
 #ifndef PNG_VERSION_INFO_ONLY
-   /* Machine specific configuration. */
-#  include "pngconf.h"
+/* Machine specific configuration. */
+#include "pngconf.h"
 #endif
 
 /*
  * Added at libpng-1.2.8
  *
  * Ref MSDN: Private as priority over Special
  * VS_FF_PRIVATEBUILD File *was not* built using standard release
  * procedures. If this value is given, the StringFileInfo block must
  * contain a PrivateBuild string.
  *
  * VS_FF_SPECIALBUILD File *was* built by the original company using
  * standard release procedures but is a variation of the standard
  * file of the same version number. If this value is given, the
  * StringFileInfo block must contain a SpecialBuild string.
  */
 
 #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
-#  define PNG_LIBPNG_BUILD_TYPE \
-       (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
+#define PNG_LIBPNG_BUILD_TYPE \
+  (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
 #else
-#  ifdef PNG_LIBPNG_SPECIALBUILD
-#    define PNG_LIBPNG_BUILD_TYPE \
-         (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
-#  else
-#    define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
-#  endif
+#ifdef PNG_LIBPNG_SPECIALBUILD
+#define PNG_LIBPNG_BUILD_TYPE \
+  (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
+#else
+#define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
+#endif
 #endif
 
 #ifndef PNG_VERSION_INFO_ONLY
 
 /* Inhibit C++ name-mangling for libpng functions but not for system calls. */
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
 /* Version information for C files, stored in png.c.  This had better match
@@ skipping 53 matching lines @@
  */
 typedef char* png_libpng_version_1_6_3;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
  * png_struct is the cache of information used while reading or writing a single
  * PNG file.  One of these is always required, although the simplified API
  * (below) hides the creation and destruction of it.
  */
 typedef struct png_struct_def png_struct;
-typedef const png_struct * png_const_structp;
-typedef png_struct * png_structp;
-typedef png_struct * * png_structpp;
+typedef const png_struct* png_const_structp;
+typedef png_struct* png_structp;
+typedef png_struct** png_structpp;
 
 /* png_info contains information read from or to be written to a PNG file.  One
  * or more of these must exist while reading or creating a PNG file.  The
  * information is not used by libpng during read but is used to control what
  * gets written when a PNG file is created.  "png_get_" function calls read
  * information during read and "png_set_" functions calls write information
  * when creating a PNG.
  * been moved into a separate header file that is not accessible to
  * applications.  Read libpng-manual.txt or libpng.3 for more info.
  */
 typedef struct png_info_def png_info;
-typedef png_info * png_infop;
-typedef const png_info * png_const_infop;
-typedef png_info * * png_infopp;
+typedef png_info* png_infop;
+typedef const png_info* png_const_infop;
+typedef png_info** png_infopp;
 
 /* Types with names ending 'p' are pointer types.  The corresponding types with
  * names ending 'rp' are identical pointer types except that the pointer is
  * marked 'restrict', which means that it is the only pointer to the object
  * passed to the function.  Applications should not use the 'restrict' types;
  * it is always valid to pass 'p' to a pointer with a function argument of the
  * corresponding 'rp' type.  Different compilers have different rules with
  * regard to type matching in the presence of 'restrict'.  For backward
  * compatibility libpng callbacks never have 'restrict' in their parameters and,
  * consequentially, writing portable application code is extremely difficult if
  * an attempt is made to use 'restrict'.
  */
-typedef png_struct * PNG_RESTRICT png_structrp;
-typedef const png_struct * PNG_RESTRICT png_const_structrp;
-typedef png_info * PNG_RESTRICT png_inforp;
-typedef const png_info * PNG_RESTRICT png_const_inforp;
+typedef png_struct* PNG_RESTRICT png_structrp;
+typedef const png_struct* PNG_RESTRICT png_const_structrp;
+typedef png_info* PNG_RESTRICT png_inforp;
+typedef const png_info* PNG_RESTRICT png_const_inforp;
 
 /* Three color definitions.  The order of the red, green, and blue, (and the
  * exact size) is not important, although the size of the fields need to
  * be png_byte or png_uint_16 (as defined below).
  */
-typedef struct png_color_struct
-{
-   png_byte red;
-   png_byte green;
-   png_byte blue;
+typedef struct png_color_struct {
+  png_byte red;
+  png_byte green;
+  png_byte blue;
 } png_color;
-typedef png_color * png_colorp;
-typedef const png_color * png_const_colorp;
-typedef png_color * * png_colorpp;
+typedef png_color* png_colorp;
+typedef const png_color* png_const_colorp;
+typedef png_color** png_colorpp;
 
-typedef struct png_color_16_struct
-{
-   png_byte index;    /* used for palette files */
-   png_uint_16 red;   /* for use in red green blue files */
-   png_uint_16 green;
-   png_uint_16 blue;
-   png_uint_16 gray;  /* for use in grayscale files */
+typedef struct png_color_16_struct {
+  png_byte index;  /* used for palette files */
+  png_uint_16 red; /* for use in red green blue files */
+  png_uint_16 green;
+  png_uint_16 blue;
+  png_uint_16 gray; /* for use in grayscale files */
 } png_color_16;
-typedef png_color_16 * png_color_16p;
-typedef const png_color_16 * png_const_color_16p;
-typedef png_color_16 * * png_color_16pp;
+typedef png_color_16* png_color_16p;
+typedef const png_color_16* png_const_color_16p;
+typedef png_color_16** png_color_16pp;
 
-typedef struct png_color_8_struct
-{
-   png_byte red;   /* for use in red green blue files */
-   png_byte green;
-   png_byte blue;
-   png_byte gray;  /* for use in grayscale files */
-   png_byte alpha; /* for alpha channel files */
+typedef struct png_color_8_struct {
+  png_byte red; /* for use in red green blue files */
+  png_byte green;
+  png_byte blue;
+  png_byte gray;  /* for use in grayscale files */
+  png_byte alpha; /* for alpha channel files */
 } png_color_8;
-typedef png_color_8 * png_color_8p;
-typedef const png_color_8 * png_const_color_8p;
-typedef png_color_8 * * png_color_8pp;
+typedef png_color_8* png_color_8p;
+typedef const png_color_8* png_const_color_8p;
+typedef png_color_8** png_color_8pp;
 
 /*
  * The following two structures are used for the in-core representation
  * of sPLT chunks.
  */
-typedef struct png_sPLT_entry_struct
-{
-   png_uint_16 red;
-   png_uint_16 green;
-   png_uint_16 blue;
-   png_uint_16 alpha;
-   png_uint_16 frequency;
+typedef struct png_sPLT_entry_struct {
+  png_uint_16 red;
+  png_uint_16 green;
+  png_uint_16 blue;
+  png_uint_16 alpha;
+  png_uint_16 frequency;
 } png_sPLT_entry;
-typedef png_sPLT_entry * png_sPLT_entryp;
-typedef const png_sPLT_entry * png_const_sPLT_entryp;
-typedef png_sPLT_entry * * png_sPLT_entrypp;
+typedef png_sPLT_entry* png_sPLT_entryp;
+typedef const png_sPLT_entry* png_const_sPLT_entryp;
+typedef png_sPLT_entry** png_sPLT_entrypp;
 
 /*  When the depth of the sPLT palette is 8 bits, the color and alpha samples
  *  occupy the LSB of their respective members, and the MSB of each member
  *  is zero-filled.  The frequency member always occupies the full 16 bits.
  */
 
-typedef struct png_sPLT_struct
-{
-   png_charp name;           /* palette name */
-   png_byte depth;           /* depth of palette samples */
-   png_sPLT_entryp entries;  /* palette entries */
-   png_int_32 nentries;      /* number of palette entries */
+typedef struct png_sPLT_struct {
+  png_charp name;          /* palette name */
+  png_byte depth;          /* depth of palette samples */
+  png_sPLT_entryp entries; /* palette entries */
+  png_int_32 nentries;     /* number of palette entries */
 } png_sPLT_t;
-typedef png_sPLT_t * png_sPLT_tp;
-typedef const png_sPLT_t * png_const_sPLT_tp;
-typedef png_sPLT_t * * png_sPLT_tpp;
+typedef png_sPLT_t* png_sPLT_tp;
+typedef const png_sPLT_t* png_const_sPLT_tp;
+typedef png_sPLT_t** png_sPLT_tpp;
 
 #ifdef PNG_TEXT_SUPPORTED
 /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file,
  * and whether that contents is compressed or not.  The "key" field
  * points to a regular zero-terminated C string.  The "text" fields can be a
  * regular C string, an empty string, or a NULL pointer.
  * However, the structure returned by png_get_text() will always contain
  * the "text" field as a regular zero-terminated C string (possibly
  * empty), never a NULL pointer, so it can be safely used in printf() and
  * other string-handling functions.  Note that the "itxt_length", "lang", and
  * "lang_key" members of the structure only exist when the library is built
  * with iTXt chunk support.  Prior to libpng-1.4.0 the library was built by
  * default without iTXt support. Also note that when iTXt *is* supported,
  * the "lang" and "lang_key" fields contain NULL pointers when the
  * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or
  * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the
  * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag"
  * which is always 0 or 1, or its "compression method" which is always 0.
  */
-typedef struct png_text_struct
-{
-   int  compression;       /* compression value:
-                             -1: tEXt, none
-                              0: zTXt, deflate
-                              1: iTXt, none
-                              2: iTXt, deflate  */
-   png_charp key;          /* keyword, 1-79 character description of "text" */
-   png_charp text;         /* comment, may be an empty string (ie "")
-                              or a NULL pointer */
-   png_size_t text_length; /* length of the text string */
-   png_size_t itxt_length; /* length of the itxt string */
-   png_charp lang;         /* language code, 0-79 characters
-                              or a NULL pointer */
-   png_charp lang_key;     /* keyword translated UTF-8 string, 0 or more
-                              chars or a NULL pointer */
+typedef struct png_text_struct {
+  int compression;        /* compression value:
+                            -1: tEXt, none
+                             0: zTXt, deflate
+                             1: iTXt, none
+                             2: iTXt, deflate  */
+  png_charp key;          /* keyword, 1-79 character description of "text" */
+  png_charp text;         /* comment, may be an empty string (ie "")
+                             or a NULL pointer */
+  png_size_t text_length; /* length of the text string */
+  png_size_t itxt_length; /* length of the itxt string */
+  png_charp lang;         /* language code, 0-79 characters
+                             or a NULL pointer */
+  png_charp lang_key;     /* keyword translated UTF-8 string, 0 or more
+                             chars or a NULL pointer */
 } png_text;
-typedef png_text * png_textp;
-typedef const png_text * png_const_textp;
-typedef png_text * * png_textpp;
+typedef png_text* png_textp;
+typedef const png_text* png_const_textp;
+typedef png_text** png_textpp;
 #endif
 
 /* Supported compression types for text in PNG files (tEXt, and zTXt).
  * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */
 #define PNG_TEXT_COMPRESSION_NONE_WR -3
 #define PNG_TEXT_COMPRESSION_zTXt_WR -2
-#define PNG_TEXT_COMPRESSION_NONE    -1
-#define PNG_TEXT_COMPRESSION_zTXt     0
-#define PNG_ITXT_COMPRESSION_NONE     1
-#define PNG_ITXT_COMPRESSION_zTXt     2
-#define PNG_TEXT_COMPRESSION_LAST     3  /* Not a valid value */
+#define PNG_TEXT_COMPRESSION_NONE -1
+#define PNG_TEXT_COMPRESSION_zTXt 0
+#define PNG_ITXT_COMPRESSION_NONE 1
+#define PNG_ITXT_COMPRESSION_zTXt 2
+#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */
 
 /* png_time is a way to hold the time in an machine independent way.
  * Two conversions are provided, both from time_t and struct tm.  There
  * is no portable way to convert to either of these structures, as far
  * as I know.  If you know of a portable way, send it to me.  As a side
  * note - PNG has always been Year 2000 compliant!
  */
-typedef struct png_time_struct
-{
-   png_uint_16 year; /* full year, as in, 1995 */
-   png_byte month;   /* month of year, 1 - 12 */
-   png_byte day;     /* day of month, 1 - 31 */
-   png_byte hour;    /* hour of day, 0 - 23 */
-   png_byte minute;  /* minute of hour, 0 - 59 */
-   png_byte second;  /* second of minute, 0 - 60 (for leap seconds) */
+typedef struct png_time_struct {
+  png_uint_16 year; /* full year, as in, 1995 */
+  png_byte month;   /* month of year, 1 - 12 */
+  png_byte day;     /* day of month, 1 - 31 */
+  png_byte hour;    /* hour of day, 0 - 23 */
+  png_byte minute;  /* minute of hour, 0 - 59 */
+  png_byte second;  /* second of minute, 0 - 60 (for leap seconds) */
 } png_time;
-typedef png_time * png_timep;
-typedef const png_time * png_const_timep;
-typedef png_time * * png_timepp;
+typedef png_time* png_timep;
+typedef const png_time* png_const_timep;
+typedef png_time** png_timepp;
 
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
 /* png_unknown_chunk is a structure to hold queued chunks for which there is
  * no specific support.  The idea is that we can use this to queue
  * up private chunks for output even though the library doesn't actually
  * know about their semantics.
  *
  * The data in the structure is set by libpng on read and used on write.
  */
-typedef struct png_unknown_chunk_t
-{
-    png_byte name[5]; /* Textual chunk name with '\0' terminator */
-    png_byte *data;   /* Data, should not be modified on read! */
-    png_size_t size;
+typedef struct png_unknown_chunk_t {
+  png_byte name[5]; /* Textual chunk name with '\0' terminator */
+  png_byte* data;   /* Data, should not be modified on read! */
+  png_size_t size;
 
-    /* On write 'location' must be set using the flag values listed below.
-     * Notice that on read it is set by libpng however the values stored have
-     * more bits set than are listed below.  Always treat the value as a
-     * bitmask.  On write set only one bit - setting multiple bits may cause the
-     * chunk to be written in multiple places.
-     */
-    png_byte location; /* mode of operation at read time */
-}
-png_unknown_chunk;
+  /* On write 'location' must be set using the flag values listed below.
+   * Notice that on read it is set by libpng however the values stored have
+   * more bits set than are listed below.  Always treat the value as a
+   * bitmask.  On write set only one bit - setting multiple bits may cause the
+   * chunk to be written in multiple places.
+   */
+  png_byte location; /* mode of operation at read time */
+} png_unknown_chunk;
 
-typedef png_unknown_chunk * png_unknown_chunkp;
-typedef const png_unknown_chunk * png_const_unknown_chunkp;
-typedef png_unknown_chunk * * png_unknown_chunkpp;
+typedef png_unknown_chunk* png_unknown_chunkp;
+typedef const png_unknown_chunk* png_const_unknown_chunkp;
+typedef png_unknown_chunk** png_unknown_chunkpp;
 #endif
 
 /* Flag values for the unknown chunk location byte. */
-#define PNG_HAVE_IHDR  0x01
-#define PNG_HAVE_PLTE  0x02
+#define PNG_HAVE_IHDR 0x01
+#define PNG_HAVE_PLTE 0x02
 #define PNG_AFTER_IDAT 0x08
 
 /* Maximum positive integer used in PNG is (2^31)-1 */
 #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL)
 #define PNG_UINT_32_MAX ((png_uint_32)(-1))
 #define PNG_SIZE_MAX ((png_size_t)(-1))
 
 /* These are constants for fixed point values encoded in the
  * PNG specification manner (x100000)
  */
-#define PNG_FP_1    100000
-#define PNG_FP_HALF  50000
-#define PNG_FP_MAX  ((png_fixed_point)0x7fffffffL)
-#define PNG_FP_MIN  (-PNG_FP_MAX)
+#define PNG_FP_1 100000
+#define PNG_FP_HALF 50000
+#define PNG_FP_MAX ((png_fixed_point)0x7fffffffL)
+#define PNG_FP_MIN (-PNG_FP_MAX)
 
 /* These describe the color_type field in png_info. */
 /* color type masks */
-#define PNG_COLOR_MASK_PALETTE    1
-#define PNG_COLOR_MASK_COLOR      2
-#define PNG_COLOR_MASK_ALPHA      4
+#define PNG_COLOR_MASK_PALETTE 1
+#define PNG_COLOR_MASK_COLOR 2
+#define PNG_COLOR_MASK_ALPHA 4
 
 /* color types.  Note that not all combinations are legal */
 #define PNG_COLOR_TYPE_GRAY 0
-#define PNG_COLOR_TYPE_PALETTE  (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
-#define PNG_COLOR_TYPE_RGB        (PNG_COLOR_MASK_COLOR)
-#define PNG_COLOR_TYPE_RGB_ALPHA  (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
+#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
+#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
+#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
 #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
 /* aliases */
-#define PNG_COLOR_TYPE_RGBA  PNG_COLOR_TYPE_RGB_ALPHA
-#define PNG_COLOR_TYPE_GA  PNG_COLOR_TYPE_GRAY_ALPHA
+#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
+#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
 
 /* This is for compression type. PNG 1.0-1.2 only define the single type. */
 #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */
 #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
 
 /* This is for filter type. PNG 1.0-1.2 only define the single type. */
-#define PNG_FILTER_TYPE_BASE      0 /* Single row per-byte filtering */
+#define PNG_FILTER_TYPE_BASE 0         /* Single row per-byte filtering */
 #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */
-#define PNG_FILTER_TYPE_DEFAULT   PNG_FILTER_TYPE_BASE
+#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
 
 /* These are for the interlacing type.  These values should NOT be changed. */
-#define PNG_INTERLACE_NONE        0 /* Non-interlaced image */
-#define PNG_INTERLACE_ADAM7       1 /* Adam7 interlacing */
-#define PNG_INTERLACE_LAST        2 /* Not a valid value */
+#define PNG_INTERLACE_NONE 0  /* Non-interlaced image */
+#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */
+#define PNG_INTERLACE_LAST 2  /* Not a valid value */
 
 /* These are for the oFFs chunk.  These values should NOT be changed. */
-#define PNG_OFFSET_PIXEL          0 /* Offset in pixels */
-#define PNG_OFFSET_MICROMETER     1 /* Offset in micrometers (1/10^6 meter) */
-#define PNG_OFFSET_LAST           2 /* Not a valid value */
+#define PNG_OFFSET_PIXEL 0      /* Offset in pixels */
+#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */
+#define PNG_OFFSET_LAST 2       /* Not a valid value */
 
 /* These are for the pCAL chunk.  These values should NOT be changed. */
-#define PNG_EQUATION_LINEAR       0 /* Linear transformation */
-#define PNG_EQUATION_BASE_E       1 /* Exponential base e transform */
-#define PNG_EQUATION_ARBITRARY    2 /* Arbitrary base exponential transform */
-#define PNG_EQUATION_HYPERBOLIC   3 /* Hyperbolic sine transformation */
-#define PNG_EQUATION_LAST         4 /* Not a valid value */
+#define PNG_EQUATION_LINEAR 0     /* Linear transformation */
+#define PNG_EQUATION_BASE_E 1     /* Exponential base e transform */
+#define PNG_EQUATION_ARBITRARY 2  /* Arbitrary base exponential transform */
+#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */
+#define PNG_EQUATION_LAST 4       /* Not a valid value */
 
 /* These are for the sCAL chunk.  These values should NOT be changed. */
-#define PNG_SCALE_UNKNOWN         0 /* unknown unit (image scale) */
-#define PNG_SCALE_METER           1 /* meters per pixel */
-#define PNG_SCALE_RADIAN          2 /* radians per pixel */
-#define PNG_SCALE_LAST            3 /* Not a valid value */
+#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */
+#define PNG_SCALE_METER 1   /* meters per pixel */
+#define PNG_SCALE_RADIAN 2  /* radians per pixel */
+#define PNG_SCALE_LAST 3    /* Not a valid value */
 
 /* These are for the pHYs chunk.  These values should NOT be changed. */
-#define PNG_RESOLUTION_UNKNOWN    0 /* pixels/unknown unit (aspect ratio) */
-#define PNG_RESOLUTION_METER      1 /* pixels/meter */
-#define PNG_RESOLUTION_LAST       2 /* Not a valid value */
+#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */
+#define PNG_RESOLUTION_METER 1   /* pixels/meter */
+#define PNG_RESOLUTION_LAST 2    /* Not a valid value */
 
 /* These are for the sRGB chunk.  These values should NOT be changed. */
 #define PNG_sRGB_INTENT_PERCEPTUAL 0
-#define PNG_sRGB_INTENT_RELATIVE   1
+#define PNG_sRGB_INTENT_RELATIVE 1
 #define PNG_sRGB_INTENT_SATURATION 2
-#define PNG_sRGB_INTENT_ABSOLUTE   3
-#define PNG_sRGB_INTENT_LAST       4 /* Not a valid value */
+#define PNG_sRGB_INTENT_ABSOLUTE 3
+#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */
 
 /* This is for text chunks */
-#define PNG_KEYWORD_MAX_LENGTH     79
+#define PNG_KEYWORD_MAX_LENGTH 79
 
 /* Maximum number of entries in PLTE/sPLT/tRNS arrays */
-#define PNG_MAX_PALETTE_LENGTH    256
+#define PNG_MAX_PALETTE_LENGTH 256
 
 /* These determine if an ancillary chunk's data has been successfully read
  * from the PNG header, or if the application has filled in the corresponding
  * data in the info_struct to be written into the output file.  The values
  * of the PNG_INFO_<chunk> defines should NOT be changed.
  */
 #define PNG_INFO_gAMA 0x0001
 #define PNG_INFO_sBIT 0x0002
 #define PNG_INFO_cHRM 0x0004
 #define PNG_INFO_PLTE 0x0008
 #define PNG_INFO_tRNS 0x0010
 #define PNG_INFO_bKGD 0x0020
 #define PNG_INFO_hIST 0x0040
 #define PNG_INFO_pHYs 0x0080
 #define PNG_INFO_oFFs 0x0100
 #define PNG_INFO_tIME 0x0200
 #define PNG_INFO_pCAL 0x0400
-#define PNG_INFO_sRGB 0x0800   /* GR-P, 0.96a */
-#define PNG_INFO_iCCP 0x1000   /* ESR, 1.0.6 */
-#define PNG_INFO_sPLT 0x2000   /* ESR, 1.0.6 */
-#define PNG_INFO_sCAL 0x4000   /* ESR, 1.0.6 */
-#define PNG_INFO_IDAT 0x8000   /* ESR, 1.0.6 */
+#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */
+#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
+#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
+#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
+#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */
 
 /* This is used for the transformation routines, as some of them
  * change these values for the row.  It also should enable using
  * the routines for other purposes.
  */
-typedef struct png_row_info_struct
-{
-   png_uint_32 width;    /* width of row */
-   png_size_t rowbytes;  /* number of bytes in row */
-   png_byte color_type;  /* color type of row */
-   png_byte bit_depth;   /* bit depth of row */
-   png_byte channels;    /* number of channels (1, 2, 3, or 4) */
-   png_byte pixel_depth; /* bits per pixel (depth * channels) */
+typedef struct png_row_info_struct {
+  png_uint_32 width;    /* width of row */
+  png_size_t rowbytes;  /* number of bytes in row */
+  png_byte color_type;  /* color type of row */
+  png_byte bit_depth;   /* bit depth of row */
+  png_byte channels;    /* number of channels (1, 2, 3, or 4) */
+  png_byte pixel_depth; /* bits per pixel (depth * channels) */
 } png_row_info;
 
-typedef png_row_info * png_row_infop;
-typedef png_row_info * * png_row_infopp;
+typedef png_row_info* png_row_infop;
+typedef png_row_info** png_row_infopp;
 
 /* These are the function types for the I/O functions and for the functions
  * that allow the user to override the default I/O functions with his or her
  * own.  The png_error_ptr type should match that of user-supplied warning
  * and error functions, while the png_rw_ptr type should match that of the
  * user read/write data functions.  Note that the 'write' function must not
  * modify the buffer it is passed. The 'read' function, on the other hand, is
  * expected to return the read data in the buffer.
  */
 typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp));
 typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t));
 typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp));
-typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32,
-    int));
-typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32,
-    int));
+typedef PNG_CALLBACK(void,
+                     *png_read_status_ptr,
+                     (png_structp, png_uint_32, int));
+typedef PNG_CALLBACK(void,
+                     *png_write_status_ptr,
+                     (png_structp, png_uint_32, int));
 
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
 typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
 typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
 
 /* The following callback receives png_uint_32 row_number, int pass for the
  * png_bytep data of the row.  When transforming an interlaced image the
  * row number is the row number within the sub-image of the interlace pass, so
  * the value will increase to the height of the sub-image (not the full image)
  * then reset to 0 for the next pass.
  *
  * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
  * find the output pixel (x,y) given an interlaced sub-image pixel
  * (row,col,pass).  (See below for these macros.)
  */
-typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep,
-    png_uint_32, int));
+typedef PNG_CALLBACK(void,
+                     *png_progressive_row_ptr,
+                     (png_structp, png_bytep, png_uint_32, int));
 #endif
 
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop,
-    png_bytep));
+typedef PNG_CALLBACK(void,
+                     *png_user_transform_ptr,
+                     (png_structp, png_row_infop, png_bytep));
 #endif
 
 #ifdef PNG_USER_CHUNKS_SUPPORTED
-typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp,
-    png_unknown_chunkp));
+typedef PNG_CALLBACK(int,
+                     *png_user_chunk_ptr,
+                     (png_structp, png_unknown_chunkp));
 #endif
 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
 /* not used anywhere */
 /* typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); */
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
 /* This must match the function definition in <setjmp.h>, and the application
  * must include this before png.h to obtain the definition of jmp_buf.  The
  * function is required to be PNG_NORETURN, but this is not checked.  If the
  * function does return the application will crash via an abort() or similar
  * system level call.
  *
  * If you get a warning here while building the library you may need to make
  * changes to ensure that pnglibconf.h records the calling convention used by
  * your compiler.  This may be very difficult - try using a different compiler
  * to build the library!
  */
-PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef);
+PNG_FUNCTION(void,
+             (PNGCAPI * png_longjmp_ptr),
+             PNGARG((jmp_buf, int)),
+             typedef);
 #endif
 
 /* Transform masks for the high-level interface */
-#define PNG_TRANSFORM_IDENTITY       0x0000    /* read and write */
-#define PNG_TRANSFORM_STRIP_16       0x0001    /* read only */
-#define PNG_TRANSFORM_STRIP_ALPHA    0x0002    /* read only */
-#define PNG_TRANSFORM_PACKING        0x0004    /* read and write */
-#define PNG_TRANSFORM_PACKSWAP       0x0008    /* read and write */
-#define PNG_TRANSFORM_EXPAND         0x0010    /* read only */
-#define PNG_TRANSFORM_INVERT_MONO    0x0020    /* read and write */
-#define PNG_TRANSFORM_SHIFT          0x0040    /* read and write */
-#define PNG_TRANSFORM_BGR            0x0080    /* read and write */
-#define PNG_TRANSFORM_SWAP_ALPHA     0x0100    /* read and write */
-#define PNG_TRANSFORM_SWAP_ENDIAN    0x0200    /* read and write */
-#define PNG_TRANSFORM_INVERT_ALPHA   0x0400    /* read and write */
-#define PNG_TRANSFORM_STRIP_FILLER   0x0800    /* write only */
+#define PNG_TRANSFORM_IDENTITY 0x0000     /* read and write */
+#define PNG_TRANSFORM_STRIP_16 0x0001     /* read only */
+#define PNG_TRANSFORM_STRIP_ALPHA 0x0002  /* read only */
+#define PNG_TRANSFORM_PACKING 0x0004      /* read and write */
+#define PNG_TRANSFORM_PACKSWAP 0x0008     /* read and write */
+#define PNG_TRANSFORM_EXPAND 0x0010       /* read only */
+#define PNG_TRANSFORM_INVERT_MONO 0x0020  /* read and write */
+#define PNG_TRANSFORM_SHIFT 0x0040        /* read and write */
+#define PNG_TRANSFORM_BGR 0x0080          /* read and write */
+#define PNG_TRANSFORM_SWAP_ALPHA 0x0100   /* read and write */
+#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200  /* read and write */
+#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */
+#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */
 /* Added to libpng-1.2.34 */
 #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER
 #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
 /* Added to libpng-1.4.0 */
-#define PNG_TRANSFORM_GRAY_TO_RGB   0x2000      /* read only */
+#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */
 /* Added to libpng-1.5.4 */
-#define PNG_TRANSFORM_EXPAND_16     0x4000      /* read only */
-#define PNG_TRANSFORM_SCALE_16      0x8000      /* read only */
+#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */
+#define PNG_TRANSFORM_SCALE_16 0x8000  /* read only */
 
 /* Flags for MNG supported features */
-#define PNG_FLAG_MNG_EMPTY_PLTE     0x01
-#define PNG_FLAG_MNG_FILTER_64      0x04
-#define PNG_ALL_MNG_FEATURES        0x05
+#define PNG_FLAG_MNG_EMPTY_PLTE 0x01
+#define PNG_FLAG_MNG_FILTER_64 0x04
+#define PNG_ALL_MNG_FEATURES 0x05
 
 /* NOTE: prior to 1.5 these functions had no 'API' style declaration,
  * this allowed the zlib default functions to be used on Windows
  * platforms.  In 1.5 the zlib default malloc (which just calls malloc and
  * ignores the first argument) should be completely compatible with the
  * following.
  */
-typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp,
-    png_alloc_size_t));
+typedef PNG_CALLBACK(png_voidp,
+                     *png_malloc_ptr,
+                     (png_structp, png_alloc_size_t));
 typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp));
 
 /* Section 3: exported functions
  * Here are the function definitions most commonly used.  This is not
  * the place to find out how to use libpng.  See libpng-manual.txt for the
  * full explanation, see example.c for the summary.  This just provides
  * a simple one line description of the use of each function.
  *
  * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in
  * pngconf.h and in the *.dfn files in the scripts directory.
@@ skipping 24 matching lines @@
 /* Tell lib we have already handled the first <num_bytes> magic bytes.
  * Handling more than 8 bytes from the beginning of the file is an error.
  */
 PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes));
 
 /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a
  * PNG file.  Returns zero if the supplied bytes match the 8-byte PNG
  * signature, and non-zero otherwise.  Having num_to_check == 0 or
  * start > 7 will always fail (ie return non-zero).
  */
-PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start,
-    png_size_t num_to_check));
+PNG_EXPORT(3,
+           int,
+           png_sig_cmp,
+           (png_const_bytep sig, png_size_t start, png_size_t num_to_check));
 
 /* Simple signature checking function.  This is the same as calling
  * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n).
  */
 #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
 
 /* Allocate and initialize png_ptr struct for reading, and any other memory. */
-PNG_EXPORTA(4, png_structp, png_create_read_struct,
-    (png_const_charp user_png_ver, png_voidp error_ptr,
-    png_error_ptr error_fn, png_error_ptr warn_fn),
-    PNG_ALLOCATED);
+PNG_EXPORTA(4,
+            png_structp,
+            png_create_read_struct,
+            (png_const_charp user_png_ver,
+             png_voidp error_ptr,
+             png_error_ptr error_fn,
+             png_error_ptr warn_fn),
+            PNG_ALLOCATED);
 
 /* Allocate and initialize png_ptr struct for writing, and any other memory */
-PNG_EXPORTA(5, png_structp, png_create_write_struct,
-    (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
-    png_error_ptr warn_fn),
-    PNG_ALLOCATED);
+PNG_EXPORTA(5,
+            png_structp,
+            png_create_write_struct,
+            (png_const_charp user_png_ver,
+             png_voidp error_ptr,
+             png_error_ptr error_fn,
+             png_error_ptr warn_fn),
+            PNG_ALLOCATED);
 
-PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(6,
+           png_size_t,
+           png_get_compression_buffer_size,
+           (png_const_structrp png_ptr));
 
-PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr,
-    png_size_t size));
+PNG_EXPORT(7,
+           void,
+           png_set_compression_buffer_size,
+           (png_structrp png_ptr, png_size_t size));
 
 /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
  * match up.
  */
 #ifdef PNG_SETJMP_SUPPORTED
 /* This function returns the jmp_buf built in to *png_ptr.  It must be
  * supplied with an appropriate 'longjmp' function to use on that jmp_buf
  * unless the default error function is overridden in which case NULL is
  * acceptable.  The size of the jmp_buf is checked against the actual size
  * allocated by the library - the call will return NULL on a mismatch
  * indicating an ABI mismatch.
  */
-PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp png_ptr,
-    png_longjmp_ptr longjmp_fn, size_t jmp_buf_size));
-#  define png_jmpbuf(png_ptr) \
-      (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof (jmp_buf))))
+PNG_EXPORT(8,
+           jmp_buf*,
+           png_set_longjmp_fn,
+           (png_structrp png_ptr,
+            png_longjmp_ptr longjmp_fn,
+            size_t jmp_buf_size));
+#define png_jmpbuf(png_ptr) \
+  (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof(jmp_buf))))
 #else
-#  define png_jmpbuf(png_ptr) \
-      (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
+#define png_jmpbuf(png_ptr) (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
 #endif
 /* This function should be used by libpng applications in place of
  * longjmp(png_ptr->jmpbuf, val).  If longjmp_fn() has been set, it
  * will use it; otherwise it will call PNG_ABORT().  This function was
  * added in libpng-1.5.0.
  */
-PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val),
-    PNG_NORETURN);
+PNG_EXPORTA(9,
+            void,
+            png_longjmp,
+            (png_const_structrp png_ptr, int val),
+            PNG_NORETURN);
 
 #ifdef PNG_READ_SUPPORTED
 /* Reset the compression stream */
 PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED);
 #endif
 
 /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */
 #ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORTA(11, png_structp, png_create_read_struct_2,
-    (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
-    png_error_ptr warn_fn,
-    png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
-    PNG_ALLOCATED);
-PNG_EXPORTA(12, png_structp, png_create_write_struct_2,
-    (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
-    png_error_ptr warn_fn,
-    png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
-    PNG_ALLOCATED);
+PNG_EXPORTA(11,
+            png_structp,
+            png_create_read_struct_2,
+            (png_const_charp user_png_ver,
+             png_voidp error_ptr,
+             png_error_ptr error_fn,
+             png_error_ptr warn_fn,
+             png_voidp mem_ptr,
+             png_malloc_ptr malloc_fn,
+             png_free_ptr free_fn),
+            PNG_ALLOCATED);
+PNG_EXPORTA(12,
+            png_structp,
+            png_create_write_struct_2,
+            (png_const_charp user_png_ver,
+             png_voidp error_ptr,
+             png_error_ptr error_fn,
+             png_error_ptr warn_fn,
+             png_voidp mem_ptr,
+             png_malloc_ptr malloc_fn,
+             png_free_ptr free_fn),
+            PNG_ALLOCATED);
 #endif
 
 /* Write the PNG file signature. */
 PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr));
 
 /* Write a PNG chunk - size, type, (optional) data, CRC. */
-PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep
-    chunk_name, png_const_bytep data, png_size_t length));
+PNG_EXPORT(14,
+           void,
+           png_write_chunk,
+           (png_structrp png_ptr,
+            png_const_bytep chunk_name,
+            png_const_bytep data,
+            png_size_t length));
 
 /* Write the start of a PNG chunk - length and chunk name. */
-PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr,
-    png_const_bytep chunk_name, png_uint_32 length));
+PNG_EXPORT(15,
+           void,
+           png_write_chunk_start,
+           (png_structrp png_ptr,
+            png_const_bytep chunk_name,
+            png_uint_32 length));
 
 /* Write the data of a PNG chunk started with png_write_chunk_start(). */
-PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr,
-    png_const_bytep data, png_size_t length));
+PNG_EXPORT(16,
+           void,
+           png_write_chunk_data,
+           (png_structrp png_ptr, png_const_bytep data, png_size_t length));
 
 /* Finish a chunk started with png_write_chunk_start() (includes CRC). */
 PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp png_ptr));
 
 /* Allocate and initialize the info structure */
-PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr),
-    PNG_ALLOCATED);
+PNG_EXPORTA(18,
+            png_infop,
+            png_create_info_struct,
+            (png_const_structrp png_ptr),
+            PNG_ALLOCATED);
 
 /* DEPRECATED: this function allowed init structures to be created using the
  * default allocation method (typically malloc).  Use is deprecated in 1.6.0 and
  * the API will be removed in the future.
  */
-PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr,
-    png_size_t png_info_struct_size), PNG_DEPRECATED);
+PNG_EXPORTA(19,
+            void,
+            png_info_init_3,
+            (png_infopp info_ptr, png_size_t png_info_struct_size),
+            PNG_DEPRECATED);
 
 /* Writes all the PNG information before the image. */
-PNG_EXPORT(20, void, png_write_info_before_PLTE,
-    (png_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(21, void, png_write_info,
-    (png_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(20,
+           void,
+           png_write_info_before_PLTE,
+           (png_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(21,
+           void,
+           png_write_info,
+           (png_structrp png_ptr, png_const_inforp info_ptr));
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read the information before the actual image data. */
-PNG_EXPORT(22, void, png_read_info,
-    (png_structrp png_ptr, png_inforp info_ptr));
+PNG_EXPORT(22,
+           void,
+           png_read_info,
+           (png_structrp png_ptr, png_inforp info_ptr));
 #endif
 
 #ifdef PNG_TIME_RFC1123_SUPPORTED
-   /* Convert to a US string format: there is no localization support in this
-    * routine.  The original implementation used a 29 character buffer in
-    * png_struct, this will be removed in future versions.
-    */
+/* Convert to a US string format: there is no localization support in this
+ * routine.  The original implementation used a 29 character buffer in
+ * png_struct, this will be removed in future versions.
+ */
 #if PNG_LIBPNG_VER < 10700
 /* To do: remove this from libpng17 (and from libpng17/png.c and pngstruct.h) */
-PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr,
-    png_const_timep ptime),PNG_DEPRECATED);
+PNG_EXPORTA(23,
+            png_const_charp,
+            png_convert_to_rfc1123,
+            (png_structrp png_ptr, png_const_timep ptime),
+            PNG_DEPRECATED);
 #endif
-PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29],
-    png_const_timep ptime));
+PNG_EXPORT(241,
+           int,
+           png_convert_to_rfc1123_buffer,
+           (char out[29], png_const_timep ptime));
 #endif
 
 #ifdef PNG_CONVERT_tIME_SUPPORTED
 /* Convert from a struct tm to png_time */
-PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime,
-    const struct tm * ttime));
+PNG_EXPORT(24,
+           void,
+           png_convert_from_struct_tm,
+           (png_timep ptime, const struct tm* ttime));
 
 /* Convert from time_t to png_time.  Uses gmtime() */
 PNG_EXPORT(25, void, png_convert_from_time_t, (png_timep ptime, time_t ttime));
 #endif /* PNG_CONVERT_tIME_SUPPORTED */
 
 #ifdef PNG_READ_EXPAND_SUPPORTED
 /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */
 PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr));
 PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr));
 PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr));
@@ skipping 12 matching lines @@
 PNG_EXPORT(30, void, png_set_bgr, (png_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
 /* Expand the grayscale to 24-bit RGB if necessary. */
 PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
 /* Reduce RGB to grayscale. */
-#define PNG_ERROR_ACTION_NONE  1
-#define PNG_ERROR_ACTION_WARN  2
+#define PNG_ERROR_ACTION_NONE 1
+#define PNG_ERROR_ACTION_WARN 2
 #define PNG_ERROR_ACTION_ERROR 3
-#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/
+#define PNG_RGB_TO_GRAY_DEFAULT (-1) /*for red/green coefficients*/
 
-PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr,
-    int error_action, double red, double green))
-PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr,
-    int error_action, png_fixed_point red, png_fixed_point green))
+PNG_FP_EXPORT(
+    32,
+    void,
+    png_set_rgb_to_gray,
+    (png_structrp png_ptr, int error_action, double red, double green))
+PNG_FIXED_EXPORT(33,
+                 void,
+                 png_set_rgb_to_gray_fixed,
+                 (png_structrp png_ptr,
+                  int error_action,
+                  png_fixed_point red,
+                  png_fixed_point green))
 
-PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp
-    png_ptr));
+PNG_EXPORT(34,
+           png_byte,
+           png_get_rgb_to_gray_status,
+           (png_const_structrp png_ptr));
 #endif
 
 #ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
-PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
-    png_colorp palette));
+PNG_EXPORT(35,
+           void,
+           png_build_grayscale_palette,
+           (int bit_depth, png_colorp palette));
 #endif
 
 #ifdef PNG_READ_ALPHA_MODE_SUPPORTED
 /* How the alpha channel is interpreted - this affects how the color channels of
  * a PNG file are returned when an alpha channel, or tRNS chunk in a palette
  * file, is present.
  *
  * This has no effect on the way pixels are written into a PNG output
  * datastream. The color samples in a PNG datastream are never premultiplied
  * with the alpha samples.
@@ skipping 31 matching lines @@
  * The final choice is to gamma encode the alpha channel as well.  This is
  * broken because, in practice, no implementation that uses this choice
  * correctly undoes the encoding before handling alpha composition.  Use this
  * choice only if other serious errors in the software or hardware you use
  * mandate it; the typical serious error is for dark halos to appear around
  * opaque areas of the composited PNG image because of arithmetic overflow.
  *
  * The API function png_set_alpha_mode specifies which of these choices to use
  * with an enumerated 'mode' value and the gamma of the required output:
  */
-#define PNG_ALPHA_PNG           0 /* according to the PNG standard */
-#define PNG_ALPHA_STANDARD      1 /* according to Porter/Duff */
-#define PNG_ALPHA_ASSOCIATED    1 /* as above; this is the normal practice */
+#define PNG_ALPHA_PNG 0           /* according to the PNG standard */
+#define PNG_ALPHA_STANDARD 1      /* according to Porter/Duff */
+#define PNG_ALPHA_ASSOCIATED 1    /* as above; this is the normal practice */
 #define PNG_ALPHA_PREMULTIPLIED 1 /* as above */
-#define PNG_ALPHA_OPTIMIZED     2 /* 'PNG' for opaque pixels, else 'STANDARD' */
-#define PNG_ALPHA_BROKEN        3 /* the alpha channel is gamma encoded */
+#define PNG_ALPHA_OPTIMIZED 2     /* 'PNG' for opaque pixels, else 'STANDARD' */
+#define PNG_ALPHA_BROKEN 3        /* the alpha channel is gamma encoded */
 
-PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode,
-    double output_gamma))
-PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr,
-    int mode, png_fixed_point output_gamma))
+PNG_FP_EXPORT(227,
+              void,
+              png_set_alpha_mode,
+              (png_structrp png_ptr, int mode, double output_gamma))
+PNG_FIXED_EXPORT(228,
+                 void,
+                 png_set_alpha_mode_fixed,
+                 (png_structrp png_ptr, int mode, png_fixed_point output_gamma))
 #endif
 
 #if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED)
 /* The output_gamma value is a screen gamma in libpng terminology: it expresses
  * how to decode the output values, not how they are encoded.  The values used
  * correspond to the normal numbers used to describe the overall gamma of a
  * computer display system; for example 2.2 for an sRGB conformant system.  The
  * values are scaled by 100000 in the _fixed version of the API (so 220000 for
  * sRGB.)
  *
@@ skipping 49 matching lines @@
  *
  * Both these values are reserved (not simple gamma values) in order to allow
  * more precise correction internally in the future.
  *
  * NOTE: the following values can be passed to either the fixed or floating
  * point APIs, but the floating point API will also accept floating point
  * values.
  */
 #define PNG_DEFAULT_sRGB -1       /* sRGB gamma and color space */
 #define PNG_GAMMA_MAC_18 -2       /* Old Mac '1.8' gamma and color space */
-#define PNG_GAMMA_sRGB   220000   /* Television standards--matches sRGB gamma */
+#define PNG_GAMMA_sRGB 220000     /* Television standards--matches sRGB gamma */
 #define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */
 #endif
 
 /* The following are examples of calls to png_set_alpha_mode to achieve the
  * required overall gamma correction and, where necessary, alpha
  * premultiplication.
  *
  * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB);
  *    This is the default libpng handling of the alpha channel - it is not
  *    pre-multiplied into the color components.  In addition the call states
@@ skipping 75 matching lines @@
 PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
     defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
 PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
 /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(39, void, png_set_filler, (png_structrp png_ptr, png_uint_32 filler,
-    int flags));
+PNG_EXPORT(39,
+           void,
+           png_set_filler,
+           (png_structrp png_ptr, png_uint_32 filler, int flags));
 /* The values of the PNG_FILLER_ defines should NOT be changed */
-#  define PNG_FILLER_BEFORE 0
-#  define PNG_FILLER_AFTER 1
+#define PNG_FILLER_BEFORE 0
+#define PNG_FILLER_AFTER 1
 /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr,
-    png_uint_32 filler, int flags));
+PNG_EXPORT(40,
+           void,
+           png_set_add_alpha,
+           (png_structrp png_ptr, png_uint_32 filler, int flags));
 #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */
 
 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
 /* Swap bytes in 16-bit depth files. */
 PNG_EXPORT(41, void, png_set_swap, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
 /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */
 PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
     defined(PNG_WRITE_PACKSWAP_SUPPORTED)
 /* Swap packing order of pixels in bytes. */
 PNG_EXPORT(43, void, png_set_packswap, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
 /* Converts files to legal bit depths. */
-PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_color_8p
-    true_bits));
+PNG_EXPORT(44,
+           void,
+           png_set_shift,
+           (png_structrp png_ptr, png_const_color_8p true_bits));
 #endif
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
     defined(PNG_WRITE_INTERLACING_SUPPORTED)
 /* Have the code handle the interlacing.  Returns the number of passes.
  * MUST be called before png_read_update_info or png_start_read_image,
  * otherwise it will not have the desired effect.  Note that it is still
  * necessary to call png_read_row or png_read_rows png_get_image_height
  * times for each pass.
 */
 PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp png_ptr));
 #endif
 
 #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
 /* Invert monochrome files */
 PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
 /* Handle alpha and tRNS by replacing with a background color.  Prior to
  * libpng-1.5.4 this API must not be called before the PNG file header has been
  * read.  Doing so will result in unexpected behavior and possible warnings or
  * errors if the PNG file contains a bKGD chunk.
  */
-PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr,
-    png_const_color_16p background_color, int background_gamma_code,
-    int need_expand, double background_gamma))
-PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr,
-    png_const_color_16p background_color, int background_gamma_code,
-    int need_expand, png_fixed_point background_gamma))
+PNG_FP_EXPORT(47,
+              void,
+              png_set_background,
+              (png_structrp png_ptr,
+               png_const_color_16p background_color,
+               int background_gamma_code,
+               int need_expand,
+               double background_gamma))
+PNG_FIXED_EXPORT(215,
+                 void,
+                 png_set_background_fixed,
+                 (png_structrp png_ptr,
+                  png_const_color_16p background_color,
+                  int background_gamma_code,
+                  int need_expand,
+                  png_fixed_point background_gamma))
 #endif
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
-#  define PNG_BACKGROUND_GAMMA_UNKNOWN 0
-#  define PNG_BACKGROUND_GAMMA_SCREEN  1
-#  define PNG_BACKGROUND_GAMMA_FILE    2
-#  define PNG_BACKGROUND_GAMMA_UNIQUE  3
+#define PNG_BACKGROUND_GAMMA_UNKNOWN 0
+#define PNG_BACKGROUND_GAMMA_SCREEN 1
+#define PNG_BACKGROUND_GAMMA_FILE 2
+#define PNG_BACKGROUND_GAMMA_UNIQUE 3
 #endif
 
 #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
 /* Scale a 16-bit depth file down to 8-bit, accurately. */
 PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
 #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */
 /* Strip the second byte of information from a 16-bit depth file. */
 PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_QUANTIZE_SUPPORTED
 /* Turn on quantizing, and reduce the palette to the number of colors
  * available.
  */
-PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr,
-    png_colorp palette, int num_palette, int maximum_colors,
-    png_const_uint_16p histogram, int full_quantize));
+PNG_EXPORT(49,
+           void,
+           png_set_quantize,
+           (png_structrp png_ptr,
+            png_colorp palette,
+            int num_palette,
+            int maximum_colors,
+            png_const_uint_16p histogram,
+            int full_quantize));
 #endif
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 /* The threshold on gamma processing is configurable but hard-wired into the
  * library.  The following is the floating point variant.
  */
-#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)
+#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED * .00001)
 
 /* Handle gamma correction. Screen_gamma=(display_exponent).
  * NOTE: this API simply sets the screen and file gamma values. It will
  * therefore override the value for gamma in a PNG file if it is called after
  * the file header has been read - use with care  - call before reading the PNG
  * file for best results!
  *
  * These routines accept the same gamma values as png_set_alpha_mode (described
  * above).  The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either
  * API (floating point or fixed.)  Notice, however, that the 'file_gamma' value
  * is the inverse of a 'screen gamma' value.
  */
-PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr,
-    double screen_gamma, double override_file_gamma))
-PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr,
-    png_fixed_point screen_gamma, png_fixed_point override_file_gamma))
+PNG_FP_EXPORT(50,
+              void,
+              png_set_gamma,
+              (png_structrp png_ptr,
+               double screen_gamma,
+               double override_file_gamma))
+PNG_FIXED_EXPORT(208,
+                 void,
+                 png_set_gamma_fixed,
+                 (png_structrp png_ptr,
+                  png_fixed_point screen_gamma,
+                  png_fixed_point override_file_gamma))
 #endif
 
 #ifdef PNG_WRITE_FLUSH_SUPPORTED
 /* Set how many lines between output flushes - 0 for no flushing */
 PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows));
 /* Flush the current PNG output buffer */
 PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr));
 #endif
 
 /* Optional update palette with requested transformations */
 PNG_EXPORT(53, void, png_start_read_image, (png_structrp png_ptr));
 
 /* Optional call to update the users info structure */
-PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr,
-    png_inforp info_ptr));
+PNG_EXPORT(54,
+           void,
+           png_read_update_info,
+           (png_structrp png_ptr, png_inforp info_ptr));
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read one or more rows of image data. */
-PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row,
-    png_bytepp display_row, png_uint_32 num_rows));
+PNG_EXPORT(55,
+           void,
+           png_read_rows,
+           (png_structrp png_ptr,
+            png_bytepp row,
+            png_bytepp display_row,
+            png_uint_32 num_rows));
 #endif
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read a row of data. */
-PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row,
-    png_bytep display_row));
+PNG_EXPORT(56,
+           void,
+           png_read_row,
+           (png_structrp png_ptr, png_bytep row, png_bytep display_row));
 #endif
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read the whole image into memory at once. */
 PNG_EXPORT(57, void, png_read_image, (png_structrp png_ptr, png_bytepp image));
 #endif
 
 /* Write a row of image data */
-PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr,
-    png_const_bytep row));
+PNG_EXPORT(58,
+           void,
+           png_write_row,
+           (png_structrp png_ptr, png_const_bytep row));
 
 /* Write a few rows of image data: (*row) is not written; however, the type
  * is declared as writeable to maintain compatibility with previous versions
  * of libpng and to allow the 'display_row' array from read_rows to be passed
  * unchanged to write_rows.
  */
-PNG_EXPORT(59, void, png_write_rows, (png_structrp png_ptr, png_bytepp row,
-    png_uint_32 num_rows));
+PNG_EXPORT(59,
+           void,
+           png_write_rows,
+           (png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows));
 
 /* Write the image data */
 PNG_EXPORT(60, void, png_write_image, (png_structrp png_ptr, png_bytepp image));
 
 /* Write the end of the PNG file. */
-PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr,
-    png_inforp info_ptr));
+PNG_EXPORT(61,
+           void,
+           png_write_end,
+           (png_structrp png_ptr, png_inforp info_ptr));
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read the end of the PNG file. */
 PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp info_ptr));
 #endif
 
 /* Free any memory associated with the png_info_struct */
-PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp png_ptr,
-    png_infopp info_ptr_ptr));
+PNG_EXPORT(63,
+           void,
+           png_destroy_info_struct,
+           (png_const_structrp png_ptr, png_infopp info_ptr_ptr));
 
 /* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr,
-    png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
+PNG_EXPORT(64,
+           void,
+           png_destroy_read_struct,
+           (png_structpp png_ptr_ptr,
+            png_infopp info_ptr_ptr,
+            png_infopp end_info_ptr_ptr));
 
 /* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr,
-    png_infopp info_ptr_ptr));
+PNG_EXPORT(65,
+           void,
+           png_destroy_write_struct,
+           (png_structpp png_ptr_ptr, png_infopp info_ptr_ptr));
 
 /* Set the libpng method of handling chunk CRC errors */
-PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action,
-    int ancil_action));
+PNG_EXPORT(66,
+           void,
+           png_set_crc_action,
+           (png_structrp png_ptr, int crit_action, int ancil_action));
 
 /* Values for png_set_crc_action() say how to handle CRC errors in
  * ancillary and critical chunks, and whether to use the data contained
  * therein.  Note that it is impossible to "discard" data in a critical
  * chunk.  For versions prior to 0.90, the action was always error/quit,
  * whereas in version 0.90 and later, the action for CRC errors in ancillary
  * chunks is warn/discard.  These values should NOT be changed.
  *
  *      value                       action:critical     action:ancillary
  */
-#define PNG_CRC_DEFAULT       0  /* error/quit          warn/discard data */
-#define PNG_CRC_ERROR_QUIT    1  /* error/quit          error/quit        */
-#define PNG_CRC_WARN_DISCARD  2  /* (INVALID)           warn/discard data */
-#define PNG_CRC_WARN_USE      3  /* warn/use data       warn/use data     */
-#define PNG_CRC_QUIET_USE     4  /* quiet/use data      quiet/use data    */
-#define PNG_CRC_NO_CHANGE     5  /* use current value   use current value */
+#define PNG_CRC_DEFAULT 0      /* error/quit          warn/discard data */
+#define PNG_CRC_ERROR_QUIT 1   /* error/quit          error/quit        */
+#define PNG_CRC_WARN_DISCARD 2 /* (INVALID)           warn/discard data */
+#define PNG_CRC_WARN_USE 3     /* warn/use data       warn/use data     */
+#define PNG_CRC_QUIET_USE 4    /* quiet/use data      quiet/use data    */
+#define PNG_CRC_NO_CHANGE 5    /* use current value   use current value */
 
 /* These functions give the user control over the scan-line filtering in
  * libpng and the compression methods used by zlib.  These functions are
  * mainly useful for testing, as the defaults should work with most users.
  * Those users who are tight on memory or want faster performance at the
  * expense of compression can modify them.  See the compression library
  * header file (zlib.h) for an explination of the compression functions.
  */
 
 /* Set the filtering method(s) used by libpng.  Currently, the only valid
  * value for "method" is 0.
  */
-PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method,
-    int filters));
+PNG_EXPORT(67,
+           void,
+           png_set_filter,
+           (png_structrp png_ptr, int method, int filters));
 
 /* Flags for png_set_filter() to say which filters to use.  The flags
  * are chosen so that they don't conflict with real filter types
  * below, in case they are supplied instead of the #defined constants.
  * These values should NOT be changed.
  */
-#define PNG_NO_FILTERS     0x00
-#define PNG_FILTER_NONE    0x08
-#define PNG_FILTER_SUB     0x10
-#define PNG_FILTER_UP      0x20
-#define PNG_FILTER_AVG     0x40
-#define PNG_FILTER_PAETH   0x80
-#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
-                         PNG_FILTER_AVG | PNG_FILTER_PAETH)
+#define PNG_NO_FILTERS 0x00
+#define PNG_FILTER_NONE 0x08
+#define PNG_FILTER_SUB 0x10
+#define PNG_FILTER_UP 0x20
+#define PNG_FILTER_AVG 0x40
+#define PNG_FILTER_PAETH 0x80
+#define PNG_ALL_FILTERS                                                \
+  (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | PNG_FILTER_AVG | \
+   PNG_FILTER_PAETH)
 
 /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now.
  * These defines should NOT be changed.
  */
-#define PNG_FILTER_VALUE_NONE  0
-#define PNG_FILTER_VALUE_SUB   1
-#define PNG_FILTER_VALUE_UP    2
-#define PNG_FILTER_VALUE_AVG   3
+#define PNG_FILTER_VALUE_NONE 0
+#define PNG_FILTER_VALUE_SUB 1
+#define PNG_FILTER_VALUE_UP 2
+#define PNG_FILTER_VALUE_AVG 3
 #define PNG_FILTER_VALUE_PAETH 4
-#define PNG_FILTER_VALUE_LAST  5
+#define PNG_FILTER_VALUE_LAST 5
 
 #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */
 /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
  * defines, either the default (minimum-sum-of-absolute-differences), or
  * the experimental method (weighted-minimum-sum-of-absolute-differences).
  *
  * Weights are factors >= 1.0, indicating how important it is to keep the
  * filter type consistent between rows.  Larger numbers mean the current
  * filter is that many times as likely to be the same as the "num_weights"
  * previous filters.  This is cumulative for each previous row with a weight.
@@ skipping 10 matching lines @@
  * setting the costs.  Costs try to improve the speed of decompression without
  * unduly increasing the compressed image size.
  *
  * A negative weight or cost indicates the default value is to be used, and
  * values in the range [0.0, 1.0) indicate the value is to remain unchanged.
  * The default values for both weights and costs are currently 1.0, but may
  * change if good general weighting/cost heuristics can be found.  If both
  * the weights and costs are set to 1.0, this degenerates the WEIGHTED method
  * to the UNWEIGHTED method, but with added encoding time/computation.
  */
-PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr,
-    int heuristic_method, int num_weights, png_const_doublep filter_weights,
-    png_const_doublep filter_costs))
-PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
-    (png_structrp png_ptr, int heuristic_method, int num_weights,
-    png_const_fixed_point_p filter_weights,
-    png_const_fixed_point_p filter_costs))
+PNG_FP_EXPORT(68,
+              void,
+              png_set_filter_heuristics,
+              (png_structrp png_ptr,
+               int heuristic_method,
+               int num_weights,
+               png_const_doublep filter_weights,
+               png_const_doublep filter_costs))
+PNG_FIXED_EXPORT(209,
+                 void,
+                 png_set_filter_heuristics_fixed,
+                 (png_structrp png_ptr,
+                  int heuristic_method,
+                  int num_weights,
+                  png_const_fixed_point_p filter_weights,
+                  png_const_fixed_point_p filter_costs))
 #endif /*  PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
 
 /* Heuristic used for row filter selection.  These defines should NOT be
  * changed.
  */
-#define PNG_FILTER_HEURISTIC_DEFAULT    0  /* Currently "UNWEIGHTED" */
-#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1  /* Used by libpng < 0.95 */
-#define PNG_FILTER_HEURISTIC_WEIGHTED   2  /* Experimental feature */
-#define PNG_FILTER_HEURISTIC_LAST       3  /* Not a valid value */
+#define PNG_FILTER_HEURISTIC_DEFAULT 0    /* Currently "UNWEIGHTED" */
+#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
+#define PNG_FILTER_HEURISTIC_WEIGHTED 2   /* Experimental feature */
+#define PNG_FILTER_HEURISTIC_LAST 3       /* Not a valid value */
 
 #ifdef PNG_WRITE_SUPPORTED
 /* Set the library compression level.  Currently, valid values range from
  * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
  * (0 - no compression, 9 - "maximal" compression).  Note that tests have
  * shown that zlib compression levels 3-6 usually perform as well as level 9
  * for PNG images, and do considerably fewer caclulations.  In the future,
  * these values may not correspond directly to the zlib compression levels.
  */
-PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr,
-    int level));
+PNG_EXPORT(69,
+           void,
+           png_set_compression_level,
+           (png_structrp png_ptr, int level));
 
-PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr,
-    int mem_level));
+PNG_EXPORT(70,
+           void,
+           png_set_compression_mem_level,
+           (png_structrp png_ptr, int mem_level));
 
-PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr,
-    int strategy));
+PNG_EXPORT(71,
+           void,
+           png_set_compression_strategy,
+           (png_structrp png_ptr, int strategy));
 
 /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a
  * smaller value of window_bits if it can do so safely.
  */
-PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr,
-    int window_bits));
+PNG_EXPORT(72,
+           void,
+           png_set_compression_window_bits,
+           (png_structrp png_ptr, int window_bits));
 
-PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr,
-    int method));
+PNG_EXPORT(73,
+           void,
+           png_set_compression_method,
+           (png_structrp png_ptr, int method));
 #endif
 
 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
 /* Also set zlib parameters for compressing non-IDAT chunks */
-PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr,
-    int level));
+PNG_EXPORT(222,
+           void,
+           png_set_text_compression_level,
+           (png_structrp png_ptr, int level));
 
-PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr,
-    int mem_level));
+PNG_EXPORT(223,
+           void,
+           png_set_text_compression_mem_level,
+           (png_structrp png_ptr, int mem_level));
 
-PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr,
-    int strategy));
+PNG_EXPORT(224,
+           void,
+           png_set_text_compression_strategy,
+           (png_structrp png_ptr, int strategy));
 
 /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a
  * smaller value of window_bits if it can do so safely.
  */
-PNG_EXPORT(225, void, png_set_text_compression_window_bits,
-    (png_structrp png_ptr, int window_bits));
+PNG_EXPORT(225,
+           void,
+           png_set_text_compression_window_bits,
+           (png_structrp png_ptr, int window_bits));
 
-PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr,
-    int method));
+PNG_EXPORT(226,
+           void,
+           png_set_text_compression_method,
+           (png_structrp png_ptr, int method));
 #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
 
 /* These next functions are called for input/output, memory, and error
  * handling.  They are in the file pngrio.c, pngwio.c, and pngerror.c,
  * and call standard C I/O routines such as fread(), fwrite(), and
  * fprintf().  These functions can be made to use other I/O routines
  * at run time for those applications that need to handle I/O in a
  * different manner by calling png_set_???_fn().  See libpng-manual.txt for
  * more information.
  */
 
 #ifdef PNG_STDIO_SUPPORTED
 /* Initialize the input/output for the PNG file to the default functions. */
 PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp));
 #endif
 
 /* Replace the (error and abort), and warning functions with user
  * supplied functions.  If no messages are to be printed you must still
  * write and use replacement functions. The replacement error_fn should
  * still do a longjmp to the last setjmp location if you are using this
  * method of error handling.  If error_fn or warning_fn is NULL, the
  * default function will be used.
  */
 
-PNG_EXPORT(75, void, png_set_error_fn, (png_structrp png_ptr,
-    png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn));
+PNG_EXPORT(75,
+           void,
+           png_set_error_fn,
+           (png_structrp png_ptr,
+            png_voidp error_ptr,
+            png_error_ptr error_fn,
+            png_error_ptr warning_fn));
 
 /* Return the user pointer associated with the error functions */
 PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp png_ptr));
 
 /* Replace the default data output functions with a user supplied one(s).
  * If buffered output is not used, then output_flush_fn can be set to NULL.
  * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time
  * output_flush_fn will be ignored (and thus can be NULL).
  * It is probably a mistake to use NULL for output_flush_fn if
  * write_data_fn is not also NULL unless you have built libpng with
  * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's
  * default flush function, which uses the standard *FILE structure, will
  * be used.
  */
-PNG_EXPORT(77, void, png_set_write_fn, (png_structrp png_ptr, png_voidp io_ptr,
-    png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
+PNG_EXPORT(77,
+           void,
+           png_set_write_fn,
+           (png_structrp png_ptr,
+            png_voidp io_ptr,
+            png_rw_ptr write_data_fn,
+            png_flush_ptr output_flush_fn));
 
 /* Replace the default data input function with a user supplied one. */
-PNG_EXPORT(78, void, png_set_read_fn, (png_structrp png_ptr, png_voidp io_ptr,
-    png_rw_ptr read_data_fn));
+PNG_EXPORT(78,
+           void,
+           png_set_read_fn,
+           (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn));
 
 /* Return the user pointer associated with the I/O functions */
 PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr));
 
-PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr,
-    png_read_status_ptr read_row_fn));
+PNG_EXPORT(80,
+           void,
+           png_set_read_status_fn,
+           (png_structrp png_ptr, png_read_status_ptr read_row_fn));
 
-PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp png_ptr,
-    png_write_status_ptr write_row_fn));
+PNG_EXPORT(81,
+           void,
+           png_set_write_status_fn,
+           (png_structrp png_ptr, png_write_status_ptr write_row_fn));
 
 #ifdef PNG_USER_MEM_SUPPORTED
 /* Replace the default memory allocation functions with user supplied one(s). */
-PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp png_ptr, png_voidp mem_ptr,
-    png_malloc_ptr malloc_fn, png_free_ptr free_fn));
+PNG_EXPORT(82,
+           void,
+           png_set_mem_fn,
+           (png_structrp png_ptr,
+            png_voidp mem_ptr,
+            png_malloc_ptr malloc_fn,
+            png_free_ptr free_fn));
 /* Return the user pointer associated with the memory functions */
 PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp png_ptr));
 #endif
 
 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp png_ptr,
-    png_user_transform_ptr read_user_transform_fn));
+PNG_EXPORT(84,
+           void,
+           png_set_read_user_transform_fn,
+           (png_structrp png_ptr,
+            png_user_transform_ptr read_user_transform_fn));
 #endif
 
 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp png_ptr,
-    png_user_transform_ptr write_user_transform_fn));
+PNG_EXPORT(85,
+           void,
+           png_set_write_user_transform_fn,
+           (png_structrp png_ptr,
+            png_user_transform_ptr write_user_transform_fn));
 #endif
 
 #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp png_ptr,
-    png_voidp user_transform_ptr, int user_transform_depth,
-    int user_transform_channels));
+PNG_EXPORT(86,
+           void,
+           png_set_user_transform_info,
+           (png_structrp png_ptr,
+            png_voidp user_transform_ptr,
+            int user_transform_depth,
+            int user_transform_channels));
 /* Return the user pointer associated with the user transform functions */
-PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(87,
+           png_voidp,
+           png_get_user_transform_ptr,
+           (png_const_structrp png_ptr));
 #endif
 
 #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
 /* Return information about the row currently being processed.  Note that these
  * APIs do not fail but will return unexpected results if called outside a user
  * transform callback.  Also note that when transforming an interlaced image the
  * row number is the row number within the sub-image of the interlace pass, so
  * the value will increase to the height of the sub-image (not the full image)
  * then reset to 0 for the next pass.
  *
@@ skipping 18 matching lines @@
  * The integer return from the callback function is interpreted thus:
  *
  * negative: An error occured, png_chunk_error will be called.
  *     zero: The chunk was not handled, the chunk will be saved. A critical
  *           chunk will cause an error at this point unless it is to be saved.
  * positive: The chunk was handled, libpng will ignore/discard it.
  *
  * See "INTERACTION WTIH USER CHUNK CALLBACKS" below for important notes about
  * how this behavior will change in libpng 1.7
  */
-PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr,
-    png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
+PNG_EXPORT(88,
+           void,
+           png_set_read_user_chunk_fn,
+           (png_structrp png_ptr,
+            png_voidp user_chunk_ptr,
+            png_user_chunk_ptr read_user_chunk_fn));
 #endif
 
 #ifdef PNG_USER_CHUNKS_SUPPORTED
 PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp png_ptr));
 #endif
 
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
 /* Sets the function callbacks for the push reader, and a pointer to a
  * user-defined structure available to the callback functions.
  */
-PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp png_ptr,
-    png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
-    png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn));
+PNG_EXPORT(90,
+           void,
+           png_set_progressive_read_fn,
+           (png_structrp png_ptr,
+            png_voidp progressive_ptr,
+            png_progressive_info_ptr info_fn,
+            png_progressive_row_ptr row_fn,
+            png_progressive_end_ptr end_fn));
 
 /* Returns the user pointer associated with the push read functions */
-PNG_EXPORT(91, png_voidp, png_get_progressive_ptr,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(91,
+           png_voidp,
+           png_get_progressive_ptr,
+           (png_const_structrp png_ptr));
 
 /* Function to be called when data becomes available */
-PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr,
-    png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size));
+PNG_EXPORT(92,
+           void,
+           png_process_data,
+           (png_structrp png_ptr,
+            png_inforp info_ptr,
+            png_bytep buffer,
+            png_size_t buffer_size));
 
 /* A function which may be called *only* within png_process_data to stop the
  * processing of any more data.  The function returns the number of bytes
  * remaining, excluding any that libpng has cached internally.  A subsequent
  * call to png_process_data must supply these bytes again.  If the argument
  * 'save' is set to true the routine will first save all the pending data and
  * will always return 0.
  */
 PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save));
 
 /* A function which may be called *only* outside (after) a call to
  * png_process_data.  It returns the number of bytes of data to skip in the
  * input.  Normally it will return 0, but if it returns a non-zero value the
  * application must skip than number of bytes of input data and pass the
  * following data to the next call to png_process_data.
  */
 PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
 /* Function that combines rows.  'new_row' is a flag that should come from
  * the callback and be non-NULL if anything needs to be done; the library
  * stores its own version of the new data internally and ignores the passed
  * in value.
  */
-PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr,
-    png_bytep old_row, png_const_bytep new_row));
+PNG_EXPORT(93,
+           void,
+           png_progressive_combine_row,
+           (png_const_structrp png_ptr,
+            png_bytep old_row,
+            png_const_bytep new_row));
 #endif /* PNG_READ_INTERLACING_SUPPORTED */
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
 
-PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr,
-    png_alloc_size_t size), PNG_ALLOCATED);
+PNG_EXPORTA(94,
+            png_voidp,
+            png_malloc,
+            (png_const_structrp png_ptr, png_alloc_size_t size),
+            PNG_ALLOCATED);
 /* Added at libpng version 1.4.0 */
-PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr,
-    png_alloc_size_t size), PNG_ALLOCATED);
+PNG_EXPORTA(95,
+            png_voidp,
+            png_calloc,
+            (png_const_structrp png_ptr, png_alloc_size_t size),
+            PNG_ALLOCATED);
 
 /* Added at libpng version 1.2.4 */
-PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr,
-    png_alloc_size_t size), PNG_ALLOCATED);
+PNG_EXPORTA(96,
+            png_voidp,
+            png_malloc_warn,
+            (png_const_structrp png_ptr, png_alloc_size_t size),
+            PNG_ALLOCATED);
 
 /* Frees a pointer allocated by png_malloc() */
 PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr));
 
 /* Free data that was allocated internally */
-PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 free_me, int num));
+PNG_EXPORT(98,
+           void,
+           png_free_data,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_uint_32 free_me,
+            int num));
 
 /* Reassign responsibility for freeing existing data, whether allocated
  * by libpng or by the application; this works on the png_info structure passed
  * in, it does not change the state for other png_info structures.
  *
  * It is unlikely that this function works correctly as of 1.6.0 and using it
  * may result either in memory leaks or double free of allocated data.
  */
-PNG_EXPORTA(99, void, png_data_freer, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int freer, png_uint_32 mask), PNG_DEPRECATED);
+PNG_EXPORTA(99,
+            void,
+            png_data_freer,
+            (png_const_structrp png_ptr,
+             png_inforp info_ptr,
+             int freer,
+             png_uint_32 mask),
+            PNG_DEPRECATED);
 
 /* Assignments for png_data_freer */
 #define PNG_DESTROY_WILL_FREE_DATA 1
 #define PNG_SET_WILL_FREE_DATA 1
 #define PNG_USER_WILL_FREE_DATA 2
 /* Flags for png_ptr->free_me and info_ptr->free_me */
 #define PNG_FREE_HIST 0x0008
 #define PNG_FREE_ICCP 0x0010
 #define PNG_FREE_SPLT 0x0020
 #define PNG_FREE_ROWS 0x0040
 #define PNG_FREE_PCAL 0x0080
 #define PNG_FREE_SCAL 0x0100
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
-#  define PNG_FREE_UNKN 0x0200
+#define PNG_FREE_UNKN 0x0200
 #endif
 /*      PNG_FREE_LIST 0x0400    removed in 1.6.0 because it is ignored */
 #define PNG_FREE_PLTE 0x1000
 #define PNG_FREE_TRNS 0x2000
 #define PNG_FREE_TEXT 0x4000
-#define PNG_FREE_ALL  0x7fff
-#define PNG_FREE_MUL  0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
+#define PNG_FREE_ALL 0x7fff
+#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
 
 #ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr,
-    png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED);
-PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr,
-    png_voidp ptr), PNG_DEPRECATED);
+PNG_EXPORTA(100,
+            png_voidp,
+            png_malloc_default,
+            (png_const_structrp png_ptr, png_alloc_size_t size),
+            PNG_ALLOCATED PNG_DEPRECATED);
+PNG_EXPORTA(101,
+            void,
+            png_free_default,
+            (png_const_structrp png_ptr, png_voidp ptr),
+            PNG_DEPRECATED);
 #endif
 
 #ifdef PNG_ERROR_TEXT_SUPPORTED
 /* Fatal error in PNG image of libpng - can't continue */
-PNG_EXPORTA(102, void, png_error, (png_const_structrp png_ptr,
-    png_const_charp error_message), PNG_NORETURN);
+PNG_EXPORTA(102,
+            void,
+            png_error,
+            (png_const_structrp png_ptr, png_const_charp error_message),
+            PNG_NORETURN);
 
 /* The same, but the chunk name is prepended to the error string. */
-PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr,
-    png_const_charp error_message), PNG_NORETURN);
+PNG_EXPORTA(103,
+            void,
+            png_chunk_error,
+            (png_const_structrp png_ptr, png_const_charp error_message),
+            PNG_NORETURN);
 
 #else
 /* Fatal error in PNG image of libpng - can't continue */
 PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN);
 #endif
 
 #ifdef PNG_WARNINGS_SUPPORTED
 /* Non-fatal error in libpng.  Can continue, but may have a problem. */
-PNG_EXPORT(105, void, png_warning, (png_const_structrp png_ptr,
-    png_const_charp warning_message));
+PNG_EXPORT(105,
+           void,
+           png_warning,
+           (png_const_structrp png_ptr, png_const_charp warning_message));
 
 /* Non-fatal error in libpng, chunk name is prepended to message. */
-PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr,
-    png_const_charp warning_message));
+PNG_EXPORT(106,
+           void,
+           png_chunk_warning,
+           (png_const_structrp png_ptr, png_const_charp warning_message));
 #endif
 
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
 /* Benign error in libpng.  Can continue, but may have a problem.
  * User can choose whether to handle as a fatal error or as a warning. */
-PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr,
-    png_const_charp warning_message));
+PNG_EXPORT(107,
+           void,
+           png_benign_error,
+           (png_const_structrp png_ptr, png_const_charp warning_message));
 
 #ifdef PNG_READ_SUPPORTED
 /* Same, chunk name is prepended to message (only during read) */
-PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr,
-    png_const_charp warning_message));
+PNG_EXPORT(108,
+           void,
+           png_chunk_benign_error,
+           (png_const_structrp png_ptr, png_const_charp warning_message));
 #endif
 
-PNG_EXPORT(109, void, png_set_benign_errors,
-    (png_structrp png_ptr, int allowed));
+PNG_EXPORT(109,
+           void,
+           png_set_benign_errors,
+           (png_structrp png_ptr, int allowed));
 #else
-#  ifdef PNG_ALLOW_BENIGN_ERRORS
-#    define png_benign_error png_warning
-#    define png_chunk_benign_error png_chunk_warning
-#  else
-#    define png_benign_error png_error
-#    define png_chunk_benign_error png_chunk_error
-#  endif
+#ifdef PNG_ALLOW_BENIGN_ERRORS
+#define png_benign_error png_warning
+#define png_chunk_benign_error png_chunk_warning
+#else
+#define png_benign_error png_error
+#define png_chunk_benign_error png_chunk_error
+#endif
 #endif
 
 /* The png_set_<chunk> functions are for storing values in the png_info_struct.
  * Similarly, the png_get_<chunk> calls are used to read values from the
  * png_info_struct, either storing the parameters in the passed variables, or
  * setting pointers into the png_info_struct where the data is stored.  The
  * png_get_<chunk> functions return a non-zero value if the data was available
  * in info_ptr, or return zero and do not change any of the parameters if the
  * data was not available.
  *
  * These functions should be used instead of directly accessing png_info
  * to avoid problems with future changes in the size and internal layout of
  * png_info_struct.
  */
 /* Returns "flag" if chunk data is valid in info_ptr. */
-PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_32 flag));
+PNG_EXPORT(110,
+           png_uint_32,
+           png_get_valid,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            png_uint_32 flag));
 
 /* Returns number of bytes needed to hold a transformed row. */
-PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(111,
+           png_size_t,
+           png_get_rowbytes,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 #ifdef PNG_INFO_IMAGE_SUPPORTED
 /* Returns row_pointers, which is an array of pointers to scanlines that was
  * returned from png_read_png().
  */
-PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(112,
+           png_bytepp,
+           png_get_rows,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Set row_pointers, which is an array of pointers to scanlines for use
  * by png_write_png().
  */
-PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_bytepp row_pointers));
+PNG_EXPORT(113,
+           void,
+           png_set_rows,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_bytepp row_pointers));
 #endif
 
 /* Returns number of color channels in image. */
-PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(114,
+           png_byte,
+           png_get_channels,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
 /* Returns image width in pixels. */
-PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(115,
+           png_uint_32,
+           png_get_image_width,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image height in pixels. */
-PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(116,
+           png_uint_32,
+           png_get_image_height,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image bit_depth. */
-PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(117,
+           png_byte,
+           png_get_bit_depth,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image color_type. */
-PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(118,
+           png_byte,
+           png_get_color_type,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image filter_type. */
-PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(119,
+           png_byte,
+           png_get_filter_type,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image interlace_type. */
-PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(120,
+           png_byte,
+           png_get_interlace_type,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image compression_type. */
-PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(121,
+           png_byte,
+           png_get_compression_type,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns image resolution in pixels per meter, from pHYs chunk data. */
-PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(122,
+           png_uint_32,
+           png_get_pixels_per_meter,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(123,
+           png_uint_32,
+           png_get_x_pixels_per_meter,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(124,
+           png_uint_32,
+           png_get_y_pixels_per_meter,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 /* Returns pixel aspect ratio, computed from pHYs chunk data.  */
-PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr))
-PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr))
+PNG_FP_EXPORT(125,
+              float,
+              png_get_pixel_aspect_ratio,
+              (png_const_structrp png_ptr, png_const_inforp info_ptr))
+PNG_FIXED_EXPORT(210,
+                 png_fixed_point,
+                 png_get_pixel_aspect_ratio_fixed,
+                 (png_const_structrp png_ptr, png_const_inforp info_ptr))
 
 /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
-PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(128, png_int_32, png_get_x_offset_microns,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-PNG_EXPORT(129, png_int_32, png_get_y_offset_microns,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(126,
+           png_int_32,
+           png_get_x_offset_pixels,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(127,
+           png_int_32,
+           png_get_y_offset_pixels,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(128,
+           png_int_32,
+           png_get_x_offset_microns,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+PNG_EXPORT(129,
+           png_int_32,
+           png_get_y_offset_microns,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 
 #endif /* PNG_EASY_ACCESS_SUPPORTED */
 
 #ifdef PNG_READ_SUPPORTED
 /* Returns pointer to signature string read from PNG header */
-PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr));
+PNG_EXPORT(130,
+           png_const_bytep,
+           png_get_signature,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
 #endif
 
 #ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_color_16p *background));
+PNG_EXPORT(131,
+           png_uint_32,
+           png_get_bKGD,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_color_16p* background));
 #endif
 
 #ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_color_16p background));
+PNG_EXPORT(132,
+           void,
+           png_set_bKGD,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_color_16p background));
 #endif
 
 #ifdef PNG_cHRM_SUPPORTED
-PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x,
-    double *red_y, double *green_x, double *green_y, double *blue_x,
-    double *blue_y))
-PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z,
-    double *green_X, double *green_Y, double *green_Z, double *blue_X,
-    double *blue_Y, double *blue_Z))
-PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr,
-    png_fixed_point *int_white_x, png_fixed_point *int_white_y,
-    png_fixed_point *int_red_x, png_fixed_point *int_red_y,
-    png_fixed_point *int_green_x, png_fixed_point *int_green_y,
-    png_fixed_point *int_blue_x, png_fixed_point *int_blue_y))
-PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr,
-    png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
-    png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
-    png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
-    png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
-    png_fixed_point *int_blue_Z))
+PNG_FP_EXPORT(133,
+              png_uint_32,
+              png_get_cHRM,
+              (png_const_structrp png_ptr,
+               png_const_inforp info_ptr,
+               double* white_x,
+               double* white_y,
+               double* red_x,
+               double* red_y,
+               double* green_x,
+               double* green_y,
+               double* blue_x,
+               double* blue_y))
+PNG_FP_EXPORT(230,
+              png_uint_32,
+              png_get_cHRM_XYZ,
+              (png_const_structrp png_ptr,
+               png_const_inforp info_ptr,
+               double* red_X,
+               double* red_Y,
+               double* red_Z,
+               double* green_X,
+               double* green_Y,
+               double* green_Z,
+               double* blue_X,
+               double* blue_Y,
+               double* blue_Z))
+PNG_FIXED_EXPORT(134,
+                 png_uint_32,
+                 png_get_cHRM_fixed,
+                 (png_const_structrp png_ptr,
+                  png_const_inforp info_ptr,
+                  png_fixed_point* int_white_x,
+                  png_fixed_point* int_white_y,
+                  png_fixed_point* int_red_x,
+                  png_fixed_point* int_red_y,
+                  png_fixed_point* int_green_x,
+                  png_fixed_point* int_green_y,
+                  png_fixed_point* int_blue_x,
+                  png_fixed_point* int_blue_y))
+PNG_FIXED_EXPORT(231,
+                 png_uint_32,
+                 png_get_cHRM_XYZ_fixed,
+                 (png_const_structrp png_ptr,
+                  png_const_inforp info_ptr,
+                  png_fixed_point* int_red_X,
+                  png_fixed_point* int_red_Y,
+                  png_fixed_point* int_red_Z,
+                  png_fixed_point* int_green_X,
+                  png_fixed_point* int_green_Y,
+                  png_fixed_point* int_green_Z,
+                  png_fixed_point* int_blue_X,
+                  png_fixed_point* int_blue_Y,
+                  png_fixed_point* int_blue_Z))
 #endif
 
 #ifdef PNG_cHRM_SUPPORTED
-PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr,
-    png_inforp info_ptr,
-    double white_x, double white_y, double red_x, double red_y, double green_x,
-    double green_y, double blue_x, double blue_y))
-PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr,
-    png_inforp info_ptr, double red_X, double red_Y, double red_Z,
-    double green_X, double green_Y, double green_Z, double blue_X,
-    double blue_Y, double blue_Z))
-PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_fixed_point int_white_x,
-    png_fixed_point int_white_y, png_fixed_point int_red_x,
-    png_fixed_point int_red_y, png_fixed_point int_green_x,
-    png_fixed_point int_green_y, png_fixed_point int_blue_x,
-    png_fixed_point int_blue_y))
-PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
-    png_fixed_point int_red_Z, png_fixed_point int_green_X,
-    png_fixed_point int_green_Y, png_fixed_point int_green_Z,
-    png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
-    png_fixed_point int_blue_Z))
+PNG_FP_EXPORT(135,
+              void,
+              png_set_cHRM,
+              (png_const_structrp png_ptr,
+               png_inforp info_ptr,
+               double white_x,
+               double white_y,
+               double red_x,
+               double red_y,
+               double green_x,
+               double green_y,
+               double blue_x,
+               double blue_y))
+PNG_FP_EXPORT(232,
+              void,
+              png_set_cHRM_XYZ,
+              (png_const_structrp png_ptr,
+               png_inforp info_ptr,
+               double red_X,
+               double red_Y,
+               double red_Z,
+               double green_X,
+               double green_Y,
+               double green_Z,
+               double blue_X,
+               double blue_Y,
+               double blue_Z))
+PNG_FIXED_EXPORT(136,
+                 void,
+                 png_set_cHRM_fixed,
+                 (png_const_structrp png_ptr,
+                  png_inforp info_ptr,
+                  png_fixed_point int_white_x,
+                  png_fixed_point int_white_y,
+                  png_fixed_point int_red_x,
+                  png_fixed_point int_red_y,
+                  png_fixed_point int_green_x,
+                  png_fixed_point int_green_y,
+                  png_fixed_point int_blue_x,
+                  png_fixed_point int_blue_y))
+PNG_FIXED_EXPORT(233,
+                 void,
+                 png_set_cHRM_XYZ_fixed,
+                 (png_const_structrp png_ptr,
+                  png_inforp info_ptr,
+                  png_fixed_point int_red_X,
+                  png_fixed_point int_red_Y,
+                  png_fixed_point int_red_Z,
+                  png_fixed_point int_green_X,
+                  png_fixed_point int_green_Y,
+                  png_fixed_point int_green_Z,
+                  png_fixed_point int_blue_X,
+                  png_fixed_point int_blue_Y,
+                  png_fixed_point int_blue_Z))
 #endif
 
 #ifdef PNG_gAMA_SUPPORTED
-PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, double *file_gamma))
-PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr,
-    png_fixed_point *int_file_gamma))
+PNG_FP_EXPORT(137,
+              png_uint_32,
+              png_get_gAMA,
+              (png_const_structrp png_ptr,
+               png_const_inforp info_ptr,
+               double* file_gamma))
+PNG_FIXED_EXPORT(138,
+                 png_uint_32,
+                 png_get_gAMA_fixed,
+                 (png_const_structrp png_ptr,
+                  png_const_inforp info_ptr,
+                  png_fixed_point* int_file_gamma))
 #endif
 
 #ifdef PNG_gAMA_SUPPORTED
-PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr,
-    png_inforp info_ptr, double file_gamma))
-PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_fixed_point int_file_gamma))
+PNG_FP_EXPORT(139,
+              void,
+              png_set_gAMA,
+              (png_const_structrp png_ptr,
+               png_inforp info_ptr,
+               double file_gamma))
+PNG_FIXED_EXPORT(140,
+                 void,
+                 png_set_gAMA_fixed,
+                 (png_const_structrp png_ptr,
+                  png_inforp info_ptr,
+                  png_fixed_point int_file_gamma))
 #endif
 
 #ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_uint_16p *hist));
+PNG_EXPORT(141,
+           png_uint_32,
+           png_get_hIST,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_uint_16p* hist));
 #endif
 
 #ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_uint_16p hist));
-#endif
-
-PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height,
-    int *bit_depth, int *color_type, int *interlace_method,
-    int *compression_method, int *filter_method));
-
-PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth,
-    int color_type, int interlace_method, int compression_method,
-    int filter_method));
+PNG_EXPORT(142,
+           void,
+           png_set_hIST,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_uint_16p hist));
+#endif
+
+PNG_EXPORT(143,
+           png_uint_32,
+           png_get_IHDR,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            png_uint_32* width,
+            png_uint_32* height,
+            int* bit_depth,
+            int* color_type,
+            int* interlace_method,
+            int* compression_method,
+            int* filter_method));
+
+PNG_EXPORT(144,
+           void,
+           png_set_IHDR,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_uint_32 width,
+            png_uint_32 height,
+            int bit_depth,
+            int color_type,
+            int interlace_method,
+            int compression_method,
+            int filter_method));
 
 #ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr,
-   png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
-   int *unit_type));
+PNG_EXPORT(145,
+           png_uint_32,
+           png_get_oFFs,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            png_int_32* offset_x,
+            png_int_32* offset_y,
+            int* unit_type));
 #endif
 
 #ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y,
-    int unit_type));
+PNG_EXPORT(146,
+           void,
+           png_set_oFFs,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_int_32 offset_x,
+            png_int_32 offset_y,
+            int unit_type));
 #endif
 
 #ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_charp *purpose, png_int_32 *X0,
-    png_int_32 *X1, int *type, int *nparams, png_charp *units,
-    png_charpp *params));
+PNG_EXPORT(147,
+           png_uint_32,
+           png_get_pCAL,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_charp* purpose,
+            png_int_32* X0,
+            png_int_32* X1,
+            int* type,
+            int* nparams,
+            png_charp* units,
+            png_charpp* params));
 #endif
 
 #ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1,
-    int type, int nparams, png_const_charp units, png_charpp params));
+PNG_EXPORT(148,
+           void,
+           png_set_pCAL,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_charp purpose,
+            png_int_32 X0,
+            png_int_32 X1,
+            int type,
+            int nparams,
+            png_const_charp units,
+            png_charpp params));
 #endif
 
 #ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
-    int *unit_type));
+PNG_EXPORT(149,
+           png_uint_32,
+           png_get_pHYs,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            png_uint_32* res_x,
+            png_uint_32* res_y,
+            int* unit_type));
 #endif
 
 #ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type));
-#endif
-
-PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr,
-   png_inforp info_ptr, png_colorp *palette, int *num_palette));
-
-PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr,
-    png_inforp info_ptr, png_const_colorp palette, int num_palette));
+PNG_EXPORT(150,
+           void,
+           png_set_pHYs,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_uint_32 res_x,
+            png_uint_32 res_y,
+            int unit_type));
+#endif
+
+PNG_EXPORT(151,
+           png_uint_32,
+           png_get_PLTE,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_colorp* palette,
+            int* num_palette));
+
+PNG_EXPORT(152,
+           void,
+           png_set_PLTE,
+           (png_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_colorp palette,
+            int num_palette));
 
 #ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_color_8p *sig_bit));
+PNG_EXPORT(153,
+           png_uint_32,
+           png_get_sBIT,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_color_8p* sig_bit));
 #endif
 
 #ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_color_8p sig_bit));
+PNG_EXPORT(154,
+           void,
+           png_set_sBIT,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_color_8p sig_bit));
 #endif
 
 #ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, int *file_srgb_intent));
+PNG_EXPORT(155,
+           png_uint_32,
+           png_get_sRGB,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            int* file_srgb_intent));
 #endif
 
 #ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int srgb_intent));
-PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int srgb_intent));
+PNG_EXPORT(156,
+           void,
+           png_set_sRGB,
+           (png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent));
+PNG_EXPORT(157,
+           void,
+           png_set_sRGB_gAMA_and_cHRM,
+           (png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent));
 #endif
 
 #ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_charpp name, int *compression_type,
-    png_bytepp profile, png_uint_32 *proflen));
+PNG_EXPORT(158,
+           png_uint_32,
+           png_get_iCCP,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_charpp name,
+            int* compression_type,
+            png_bytepp profile,
+            png_uint_32* proflen));
 #endif
 
 #ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_charp name, int compression_type,
-    png_const_bytep profile, png_uint_32 proflen));
+PNG_EXPORT(159,
+           void,
+           png_set_iCCP,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_charp name,
+            int compression_type,
+            png_const_bytep profile,
+            png_uint_32 proflen));
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_sPLT_tpp entries));
+PNG_EXPORT(160,
+           int,
+           png_get_sPLT,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_sPLT_tpp entries));
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_sPLT_tp entries, int nentries));
+PNG_EXPORT(161,
+           void,
+           png_set_sPLT,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_sPLT_tp entries,
+            int nentries));
 #endif
 
 #ifdef PNG_TEXT_SUPPORTED
 /* png_get_text also returns the number of text chunks in *num_text */
-PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_textp *text_ptr, int *num_text));
+PNG_EXPORT(162,
+           int,
+           png_get_text,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_textp* text_ptr,
+            int* num_text));
 #endif
 
 /* Note while png_set_text() will accept a structure whose text,
  * language, and  translated keywords are NULL pointers, the structure
  * returned by png_get_text will always contain regular
  * zero-terminated C strings.  They might be empty strings but
  * they will never be NULL pointers.
  */
 
 #ifdef PNG_TEXT_SUPPORTED
-PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_textp text_ptr, int num_text));
+PNG_EXPORT(163,
+           void,
+           png_set_text,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_textp text_ptr,
+            int num_text));
 #endif
 
 #ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_timep *mod_time));
+PNG_EXPORT(164,
+           png_uint_32,
+           png_get_tIME,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_timep* mod_time));
 #endif
 
 #ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_timep mod_time));
+PNG_EXPORT(165,
+           void,
+           png_set_tIME,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_timep mod_time));
 #endif
 
 #ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans,
-    png_color_16p *trans_color));
+PNG_EXPORT(166,
+           png_uint_32,
+           png_get_tRNS,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_bytep* trans_alpha,
+            int* num_trans,
+            png_color_16p* trans_color));
 #endif
 
 #ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr,
-    png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans,
-    png_const_color_16p trans_color));
+PNG_EXPORT(167,
+           void,
+           png_set_tRNS,
+           (png_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_bytep trans_alpha,
+            int num_trans,
+            png_const_color_16p trans_color));
 #endif
 
 #ifdef PNG_sCAL_SUPPORTED
-PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, int *unit, double *width, double *height))
+PNG_FP_EXPORT(168,
+              png_uint_32,
+              png_get_sCAL,
+              (png_const_structrp png_ptr,
+               png_const_inforp info_ptr,
+               int* unit,
+               double* width,
+               double* height))
 #if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
-   defined(PNG_FLOATING_POINT_SUPPORTED)
+    defined(PNG_FLOATING_POINT_SUPPORTED)
 /* NOTE: this API is currently implemented using floating point arithmetic,
  * consequently it can only be used on systems with floating point support.
  * In any case the range of values supported by png_fixed_point is small and it
  * is highly recommended that png_get_sCAL_s be used instead.
  */
-PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit,
-    png_fixed_point *width, png_fixed_point *height))
+PNG_FIXED_EXPORT(214,
+                 png_uint_32,
+                 png_get_sCAL_fixed,
+                 (png_const_structrp png_ptr,
+                  png_const_inforp info_ptr,
+                  int* unit,
+                  png_fixed_point* width,
+                  png_fixed_point* height))
 #endif
-PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit,
-    png_charpp swidth, png_charpp sheight));
+PNG_EXPORT(169,
+           png_uint_32,
+           png_get_sCAL_s,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            int* unit,
+            png_charpp swidth,
+            png_charpp sheight));
 
-PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int unit, double width, double height))
-PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr,
-   png_inforp info_ptr, int unit, png_fixed_point width,
-   png_fixed_point height))
-PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int unit,
-    png_const_charp swidth, png_const_charp sheight));
+PNG_FP_EXPORT(170,
+              void,
+              png_set_sCAL,
+              (png_const_structrp png_ptr,
+               png_inforp info_ptr,
+               int unit,
+               double width,
+               double height))
+PNG_FIXED_EXPORT(213,
+                 void,
+                 png_set_sCAL_fixed,
+                 (png_const_structrp png_ptr,
+                  png_inforp info_ptr,
+                  int unit,
+                  png_fixed_point width,
+                  png_fixed_point height))
+PNG_EXPORT(171,
+           void,
+           png_set_sCAL_s,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            int unit,
+            png_const_charp swidth,
+            png_const_charp sheight));
 #endif /* PNG_sCAL_SUPPORTED */
 
 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
 /* Provide the default handling for all unknown chunks or, optionally, for
  * specific unknown chunks.
  *
  * NOTE: prior to 1.6.0 the handling specified for particular chunks on read was
  * ignored and the default was used, the per-chunk setting only had an effect on
  * write.  If you wish to have chunk-specific handling on read in code that must
  * work on earlier versions you must use a user chunk callback to specify the
@@ skipping 81 matching lines @@
  *    otherwise the chunk list array is ignored.
  *
  *    If num_chunks is 0 the "keep" parameter specifies the default behavior for
  *    unknown chunks, as described above.
  *
  *    If num_chunks is negative, then the "keep" parameter specifies the manner
  *    for handling all unknown chunks plus all chunks recognized by libpng
  *    except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to
  *    be processed by libpng.
  */
-PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr,
-    int keep, png_const_bytep chunk_list, int num_chunks));
+PNG_EXPORT(172,
+           void,
+           png_set_keep_unknown_chunks,
+           (png_structrp png_ptr,
+            int keep,
+            png_const_bytep chunk_list,
+            int num_chunks));
 
 /* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned;
  * the result is therefore true (non-zero) if special handling is required,
  * false for the default handling.
  */
-PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr,
-    png_const_bytep chunk_name));
+PNG_EXPORT(173,
+           int,
+           png_handle_as_unknown,
+           (png_const_structrp png_ptr, png_const_bytep chunk_name));
 #endif
 
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
-PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_unknown_chunkp unknowns,
-    int num_unknowns));
-   /* NOTE: prior to 1.6.0 this routine set the 'location' field of the added
-    * unknowns to the location currently stored in the png_struct.  This is
-    * invariably the wrong value on write.  To fix this call the following API
-    * for each chunk in the list with the correct location.  If you know your
-    * code won't be compiled on earlier versions you can rely on
-    * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing
-    * the correct thing.
-    */
-
-PNG_EXPORT(175, void, png_set_unknown_chunk_location,
+PNG_EXPORT(174,
+           void,
+           png_set_unknown_chunks,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_const_unknown_chunkp unknowns,
+            int num_unknowns));
+/* NOTE: prior to 1.6.0 this routine set the 'location' field of the added
+ * unknowns to the location currently stored in the png_struct.  This is
+ * invariably the wrong value on write.  To fix this call the following API
+ * for each chunk in the list with the correct location.  If you know your
+ * code won't be compiled on earlier versions you can rely on
+ * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing
+ * the correct thing.
+ */
+
+PNG_EXPORT(
+    175,
+    void,
+    png_set_unknown_chunk_location,
     (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location));
 
-PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr,
-    png_inforp info_ptr, png_unknown_chunkpp entries));
+PNG_EXPORT(176,
+           int,
+           png_get_unknown_chunks,
+           (png_const_structrp png_ptr,
+            png_inforp info_ptr,
+            png_unknown_chunkpp entries));
 #endif
 
 /* Png_free_data() will turn off the "valid" flag for anything it frees.
  * If you need to turn it off for a chunk that your application has freed,
  * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
  */
-PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr,
-    png_inforp info_ptr, int mask));
+PNG_EXPORT(177,
+           void,
+           png_set_invalid,
+           (png_const_structrp png_ptr, png_inforp info_ptr, int mask));
 
 #ifdef PNG_INFO_IMAGE_SUPPORTED
 /* The "params" pointer is currently not used and is for future expansion. */
-PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr,
-    int transforms, png_voidp params));
-PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr,
-    int transforms, png_voidp params));
-#endif
-
-PNG_EXPORT(180, png_const_charp, png_get_copyright,
-    (png_const_structrp png_ptr));
-PNG_EXPORT(181, png_const_charp, png_get_header_ver,
-    (png_const_structrp png_ptr));
-PNG_EXPORT(182, png_const_charp, png_get_header_version,
-    (png_const_structrp png_ptr));
-PNG_EXPORT(183, png_const_charp, png_get_libpng_ver,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(178,
+           void,
+           png_read_png,
+           (png_structrp png_ptr,
+            png_inforp info_ptr,
+            int transforms,
+            png_voidp params));
+PNG_EXPORT(179,
+           void,
+           png_write_png,
+           (png_structrp png_ptr,
+            png_inforp info_ptr,
+            int transforms,
+            png_voidp params));
+#endif
+
+PNG_EXPORT(180,
+           png_const_charp,
+           png_get_copyright,
+           (png_const_structrp png_ptr));
+PNG_EXPORT(181,
+           png_const_charp,
+           png_get_header_ver,
+           (png_const_structrp png_ptr));
+PNG_EXPORT(182,
+           png_const_charp,
+           png_get_header_version,
+           (png_const_structrp png_ptr));
+PNG_EXPORT(183,
+           png_const_charp,
+           png_get_libpng_ver,
+           (png_const_structrp png_ptr));
 
 #ifdef PNG_MNG_FEATURES_SUPPORTED
-PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr,
-    png_uint_32 mng_features_permitted));
+PNG_EXPORT(184,
+           png_uint_32,
+           png_permit_mng_features,
+           (png_structrp png_ptr, png_uint_32 mng_features_permitted));
 #endif
 
 /* For use in png_set_keep_unknown, added to version 1.2.6 */
-#define PNG_HANDLE_CHUNK_AS_DEFAULT   0
-#define PNG_HANDLE_CHUNK_NEVER        1
-#define PNG_HANDLE_CHUNK_IF_SAFE      2
-#define PNG_HANDLE_CHUNK_ALWAYS       3
-#define PNG_HANDLE_CHUNK_LAST         4
+#define PNG_HANDLE_CHUNK_AS_DEFAULT 0
+#define PNG_HANDLE_CHUNK_NEVER 1
+#define PNG_HANDLE_CHUNK_IF_SAFE 2
+#define PNG_HANDLE_CHUNK_ALWAYS 3
+#define PNG_HANDLE_CHUNK_LAST 4
 
 /* Strip the prepended error numbers ("#nnn ") from error and warning
  * messages before passing them to the error or warning handler.
  */
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
-PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr,
-    png_uint_32 strip_mode));
+PNG_EXPORT(185,
+           void,
+           png_set_strip_error_numbers,
+           (png_structrp png_ptr, png_uint_32 strip_mode));
 #endif
 
 /* Added in libpng-1.2.6 */
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
-PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr,
-    png_uint_32 user_width_max, png_uint_32 user_height_max));
-PNG_EXPORT(187, png_uint_32, png_get_user_width_max,
-    (png_const_structrp png_ptr));
-PNG_EXPORT(188, png_uint_32, png_get_user_height_max,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(186,
+           void,
+           png_set_user_limits,
+           (png_structrp png_ptr,
+            png_uint_32 user_width_max,
+            png_uint_32 user_height_max));
+PNG_EXPORT(187,
+           png_uint_32,
+           png_get_user_width_max,
+           (png_const_structrp png_ptr));
+PNG_EXPORT(188,
+           png_uint_32,
+           png_get_user_height_max,
+           (png_const_structrp png_ptr));
 /* Added in libpng-1.4.0 */
-PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr,
-    png_uint_32 user_chunk_cache_max));
-PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(189,
+           void,
+           png_set_chunk_cache_max,
+           (png_structrp png_ptr, png_uint_32 user_chunk_cache_max));
+PNG_EXPORT(190,
+           png_uint_32,
+           png_get_chunk_cache_max,
+           (png_const_structrp png_ptr));
 /* Added in libpng-1.4.1 */
-PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr,
-    png_alloc_size_t user_chunk_cache_max));
-PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max,
-    (png_const_structrp png_ptr));
+PNG_EXPORT(191,
+           void,
+           png_set_chunk_malloc_max,
+           (png_structrp png_ptr, png_alloc_size_t user_chunk_cache_max));
+PNG_EXPORT(192,
+           png_alloc_size_t,
+           png_get_chunk_malloc_max,
+           (png_const_structrp png_ptr));
 #endif
 
 #if defined(PNG_INCH_CONVERSIONS_SUPPORTED)
-PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-
-PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-
-PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr));
-
-PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr))
+PNG_EXPORT(193,
+           png_uint_32,
+           png_get_pixels_per_inch,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+
+PNG_EXPORT(194,
+           png_uint_32,
+           png_get_x_pixels_per_inch,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+
+PNG_EXPORT(195,
+           png_uint_32,
+           png_get_y_pixels_per_inch,
+           (png_const_structrp png_ptr, png_const_inforp info_ptr));
+
+PNG_FP_EXPORT(196,
+              float,
+              png_get_x_offset_inches,
+              (png_const_structrp png_ptr, png_const_inforp info_ptr))
 #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
-PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr))
-#endif
-
-PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr))
+PNG_FIXED_EXPORT(211,
+                 png_fixed_point,
+                 png_get_x_offset_inches_fixed,
+                 (png_const_structrp png_ptr, png_const_inforp info_ptr))
+#endif
+
+PNG_FP_EXPORT(197,
+              float,
+              png_get_y_offset_inches,
+              (png_const_structrp png_ptr, png_const_inforp info_ptr))
 #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
-PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
-    (png_const_structrp png_ptr, png_const_inforp info_ptr))
-#endif
-
-#  ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
-    int *unit_type));
-#  endif /* PNG_pHYs_SUPPORTED */
-#endif  /* PNG_INCH_CONVERSIONS_SUPPORTED */
+PNG_FIXED_EXPORT(212,
+                 png_fixed_point,
+                 png_get_y_offset_inches_fixed,
+                 (png_const_structrp png_ptr, png_const_inforp info_ptr))
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+PNG_EXPORT(198,
+           png_uint_32,
+           png_get_pHYs_dpi,
+           (png_const_structrp png_ptr,
+            png_const_inforp info_ptr,
+            png_uint_32* res_x,
+            png_uint_32* res_y,
+            int* unit_type));
+#endif /* PNG_pHYs_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
 
 /* Added in libpng-1.4.0 */
 #ifdef PNG_IO_STATE_SUPPORTED
 PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr));
 
 /* Removed from libpng 1.6; use png_get_io_chunk_type. */
-PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr),
-    PNG_DEPRECATED)
-
-PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
-    (png_const_structrp png_ptr));
+PNG_REMOVED(200,
+            png_const_bytep,
+            png_get_io_chunk_name,
+            (png_structrp png_ptr),
+            PNG_DEPRECATED)
+
+PNG_EXPORT(216,
+           png_uint_32,
+           png_get_io_chunk_type,
+           (png_const_structrp png_ptr));
 
 /* The flags returned by png_get_io_state() are the following: */
-#  define PNG_IO_NONE        0x0000   /* no I/O at this moment */
-#  define PNG_IO_READING     0x0001   /* currently reading */
-#  define PNG_IO_WRITING     0x0002   /* currently writing */
-#  define PNG_IO_SIGNATURE   0x0010   /* currently at the file signature */
-#  define PNG_IO_CHUNK_HDR   0x0020   /* currently at the chunk header */
-#  define PNG_IO_CHUNK_DATA  0x0040   /* currently at the chunk data */
-#  define PNG_IO_CHUNK_CRC   0x0080   /* currently at the chunk crc */
-#  define PNG_IO_MASK_OP     0x000f   /* current operation: reading/writing */
-#  define PNG_IO_MASK_LOC    0x00f0   /* current location: sig/hdr/data/crc */
-#endif /* ?PNG_IO_STATE_SUPPORTED */
+#define PNG_IO_NONE 0x0000       /* no I/O at this moment */
+#define PNG_IO_READING 0x0001    /* currently reading */
+#define PNG_IO_WRITING 0x0002    /* currently writing */
+#define PNG_IO_SIGNATURE 0x0010  /* currently at the file signature */
+#define PNG_IO_CHUNK_HDR 0x0020  /* currently at the chunk header */
+#define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
+#define PNG_IO_CHUNK_CRC 0x0080  /* currently at the chunk crc */
+#define PNG_IO_MASK_OP 0x000f    /* current operation: reading/writing */
+#define PNG_IO_MASK_LOC 0x00f0   /* current location: sig/hdr/data/crc */
+#endif                           /* ?PNG_IO_STATE_SUPPORTED */
 
 /* Interlace support.  The following macros are always defined so that if
  * libpng interlace handling is turned off the macros may be used to handle
  * interlaced images within the application.
  */
 #define PNG_INTERLACE_ADAM7_PASSES 7
 
 /* Two macros to return the first row and first column of the original,
  * full, image which appears in a given pass.  'pass' is in the range 0
  * to 6 and the result is in the range 0 to 7.
  */
-#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7)
-#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7)
+#define PNG_PASS_START_ROW(pass) (((1 & ~(pass)) << (3 - ((pass) >> 1))) & 7)
+#define PNG_PASS_START_COL(pass) \
+  (((1 & (pass)) << (3 - (((pass) + 1) >> 1))) & 7)
 
 /* A macro to return the offset between pixels in the output row for a pair of
  * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that
  * follows.  Note that ROW_OFFSET is the offset from one row to the next whereas
  * COL_OFFSET is from one column to the next, within a row.
  */
-#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8)
-#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1))
+#define PNG_PASS_ROW_OFFSET(pass) ((pass) > 2 ? (8 >> (((pass)-1) >> 1)) : 8)
+#define PNG_PASS_COL_OFFSET(pass) (1 << ((7 - (pass)) >> 1))
 
 /* Two macros to help evaluate the number of rows or columns in each
  * pass.  This is expressed as a shift - effectively log2 of the number or
  * rows or columns in each 8x8 tile of the original image.
  */
-#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3)
-#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3)
+#define PNG_PASS_ROW_SHIFT(pass) ((pass) > 2 ? (8 - (pass)) >> 1 : 3)
+#define PNG_PASS_COL_SHIFT(pass) ((pass) > 1 ? (7 - (pass)) >> 1 : 3)
 
 /* Hence two macros to determine the number of rows or columns in a given
  * pass of an image given its height or width.  In fact these macros may
  * return non-zero even though the sub-image is empty, because the other
  * dimension may be empty for a small image.
  */
-#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\
-   -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass))
-#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
-   -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
+#define PNG_PASS_ROWS(height, pass)                                        \
+  (((height) +                                                             \
+    (((1 << PNG_PASS_ROW_SHIFT(pass)) - 1) - PNG_PASS_START_ROW(pass))) >> \
+   PNG_PASS_ROW_SHIFT(pass))
+#define PNG_PASS_COLS(width, pass)                                         \
+  (((width) +                                                              \
+    (((1 << PNG_PASS_COL_SHIFT(pass)) - 1) - PNG_PASS_START_COL(pass))) >> \
+   PNG_PASS_COL_SHIFT(pass))
 
 /* For the reader row callbacks (both progressive and sequential) it is
  * necessary to find the row in the output image given a row in an interlaced
  * image, so two more macros:
  */
 #define PNG_ROW_FROM_PASS_ROW(y_in, pass) \
-   (((y_in)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass))
+  (((y_in) << PNG_PASS_ROW_SHIFT(pass)) + PNG_PASS_START_ROW(pass))
 #define PNG_COL_FROM_PASS_COL(x_in, pass) \
-   (((x_in)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))
+  (((x_in) << PNG_PASS_COL_SHIFT(pass)) + PNG_PASS_START_COL(pass))
 
 /* Two macros which return a boolean (0 or 1) saying whether the given row
  * or column is in a particular pass.  These use a common utility macro that
  * returns a mask for a given pass - the offset 'off' selects the row or
  * column version.  The mask has the appropriate bit set for each column in
  * the tile.
  */
-#define PNG_PASS_MASK(pass,off) ( \
-   ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \
-   ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0))
+#define PNG_PASS_MASK(pass, off)                           \
+  (((0x110145AF >> (((7 - (off)) - (pass)) << 2)) & 0xF) | \
+   ((0x01145AF0 >> (((7 - (off)) - (pass)) << 2)) & 0xF0))
 
 #define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
-   ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
+  ((PNG_PASS_MASK(pass, 0) >> ((y)&7)) & 1)
 #define PNG_COL_IN_INTERLACE_PASS(x, pass) \
-   ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1)
+  ((PNG_PASS_MASK(pass, 1) >> ((x)&7)) & 1)
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
 /* With these routines we avoid an integer divide, which will be slower on
  * most machines.  However, it does take more operations than the corresponding
  * divide method, so it may be slower on a few RISC systems.  There are two
  * shifts (by 8 or 16 bits) and an addition, versus a single integer divide.
  *
  * Note that the rounding factors are NOT supposed to be the same!  128 and
  * 32768 are correct for the NODIV code; 127 and 32767 are correct for the
  * standard method.
  *
  * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ]
  */
 
- /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
+/* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
 
-#  define png_composite(composite, fg, alpha, bg)         \
-     { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
-           * (png_uint_16)(alpha)                         \
-           + (png_uint_16)(bg)*(png_uint_16)(255          \
-           - (png_uint_16)(alpha)) + 128);                \
-       (composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
+#define png_composite(composite, fg, alpha, bg)                               \
+  {                                                                           \
+    png_uint_16 temp = (png_uint_16)(                                         \
+        (png_uint_16)(fg) * (png_uint_16)(alpha) +                            \
+        (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + 128); \
+    (composite) = (png_byte)((temp + (temp >> 8)) >> 8);                      \
+  }
 
-#  define png_composite_16(composite, fg, alpha, bg)       \
-     { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg)  \
-           * (png_uint_32)(alpha)                          \
-           + (png_uint_32)(bg)*(65535                      \
-           - (png_uint_32)(alpha)) + 32768);               \
-       (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
+#define png_composite_16(composite, fg, alpha, bg)                   \
+  {                                                                  \
+    png_uint_32 temp = (png_uint_32)(                                \
+        (png_uint_32)(fg) * (png_uint_32)(alpha) +                   \
+        (png_uint_32)(bg) * (65535 - (png_uint_32)(alpha)) + 32768); \
+    (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16);        \
+  }
 
-#else  /* Standard method using integer division */
+#else /* Standard method using integer division */
 
-#  define png_composite(composite, fg, alpha, bg)                          \
-     (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) +  \
-     (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) +       \
-     127) / 255)
+#define png_composite(composite, fg, alpha, bg)                               \
+  (composite) = (png_byte)(                                                   \
+      ((png_uint_16)(fg) * (png_uint_16)(alpha) +                             \
+       (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + 127) / \
+      255)
 
-#  define png_composite_16(composite, fg, alpha, bg)                         \
-     (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
-     (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) +         \
-     32767) / 65535)
+#define png_composite_16(composite, fg, alpha, bg)                       \
+  (composite) = (png_uint_16)(                                           \
+      ((png_uint_32)(fg) * (png_uint_32)(alpha) +                        \
+       (png_uint_32)(bg) * (png_uint_32)(65535 - (png_uint_32)(alpha)) + \
+       32767) /                                                          \
+      65535)
 #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
 
 #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
 PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf));
 PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf));
 PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf));
 #endif
 
-PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr,
-    png_const_bytep buf));
+PNG_EXPORT(204,
+           png_uint_32,
+           png_get_uint_31,
+           (png_const_structrp png_ptr, png_const_bytep buf));
 /* No png_get_int_16 -- may be added if there's a real need for it. */
 
 /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */
 #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
 PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i));
 #endif
 #ifdef PNG_SAVE_INT_32_SUPPORTED
 PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i));
 #endif
 
 /* Place a 16-bit number into a buffer in PNG byte order.
  * The parameter is declared unsigned int, not png_uint_16,
  * just to avoid potential problems on pre-ANSI C compilers.
  */
 #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
 PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
 /* No png_save_int_16 -- may be added if there's a real need for it. */
 #endif
 
 #ifdef PNG_USE_READ_MACROS
 /* Inline macros to do direct reads of bytes from the input buffer.
  * The png_get_int_32() routine assumes we are using two's complement
  * format for negative values, which is almost certainly true.
  */
-#  define PNG_get_uint_32(buf) \
-     (((png_uint_32)(*(buf)) << 24) + \
-      ((png_uint_32)(*((buf) + 1)) << 16) + \
-      ((png_uint_32)(*((buf) + 2)) << 8) + \
-      ((png_uint_32)(*((buf) + 3))))
+#define PNG_get_uint_32(buf)                                             \
+  (((png_uint_32)(*(buf)) << 24) + ((png_uint_32)(*((buf) + 1)) << 16) + \
+   ((png_uint_32)(*((buf) + 2)) << 8) + ((png_uint_32)(*((buf) + 3))))
 
-   /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
-    * function) incorrectly returned a value of type png_uint_32.
-    */
-#  define PNG_get_uint_16(buf) \
-     ((png_uint_16) \
-      (((unsigned int)(*(buf)) << 8) + \
-       ((unsigned int)(*((buf) + 1)))))
+/* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
+ * function) incorrectly returned a value of type png_uint_32.
+ */
+#define PNG_get_uint_16(buf)                     \
+  ((png_uint_16)(((unsigned int)(*(buf)) << 8) + \
+                 ((unsigned int)(*((buf) + 1)))))
 
-#  define PNG_get_int_32(buf) \
-     ((png_int_32)((*(buf) & 0x80) \
-      ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
-      : (png_int_32)png_get_uint_32(buf)))
+#define PNG_get_int_32(buf)                                           \
+  ((png_int_32)(                                                      \
+      (*(buf)&0x80)                                                   \
+          ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
+          : (png_int_32)png_get_uint_32(buf)))
 
-   /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h,
-    * but defining a macro name prefixed with PNG_PREFIX.
-    */
-#  ifndef PNG_PREFIX
-#     define png_get_uint_32(buf) PNG_get_uint_32(buf)
-#     define png_get_uint_16(buf) PNG_get_uint_16(buf)
-#     define png_get_int_32(buf)  PNG_get_int_32(buf)
-#  endif
+/* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h,
+ * but defining a macro name prefixed with PNG_PREFIX.
+ */
+#ifndef PNG_PREFIX
+#define png_get_uint_32(buf) PNG_get_uint_32(buf)
+#define png_get_uint_16(buf) PNG_get_uint_16(buf)
+#define png_get_int_32(buf) PNG_get_int_32(buf)
+#endif
 #else
-#  ifdef PNG_PREFIX
-      /* No macros; revert to the (redefined) function */
-#     define PNG_get_uint_32 (png_get_uint_32)
-#     define PNG_get_uint_16 (png_get_uint_16)
-#     define PNG_get_int_32  (png_get_int_32)
-#  endif
+#ifdef PNG_PREFIX
+/* No macros; revert to the (redefined) function */
+#define PNG_get_uint_32 (png_get_uint_32)
+#define PNG_get_uint_16 (png_get_uint_16)
+#define PNG_get_int_32 (png_get_int_32)
+#endif
 #endif
 
 /*******************************************************************************
  *  SIMPLIFIED API
  *******************************************************************************
  *
  * Please read the documentation in libpng-manual.txt (TODO: write said
  * documentation) if you don't understand what follows.
  *
  * The simplified API hides the details of both libpng and the PNG file format
@@ skipping 29 matching lines @@
  *    the 'format' member to the format of the image samples.
  * 3) Call the appropriate png_image_write... function with a pointer to the
  *    image and, if necessary, the color-map to write the PNG data.
  *
  * png_image is a structure that describes the in-memory format of an image
  * when it is being read or defines the in-memory format of an image that you
  * need to write:
  */
 #define PNG_IMAGE_VERSION 1
 
-typedef struct png_control *png_controlp;
-typedef struct
-{
-   png_controlp opaque;    /* Initialize to NULL, free with png_image_free */
-   png_uint_32  version;   /* Set to PNG_IMAGE_VERSION */
-   png_uint_32  width;     /* Image width in pixels (columns) */
-   png_uint_32  height;    /* Image height in pixels (rows) */
-   png_uint_32  format;    /* Image format as defined below */
-   png_uint_32  flags;     /* A bit mask containing informational flags */
-   png_uint_32  colormap_entries;
-                           /* Number of entries in the color-map */
+typedef struct png_control* png_controlp;
+typedef struct {
+  png_controlp opaque; /* Initialize to NULL, free with png_image_free */
+  png_uint_32 version; /* Set to PNG_IMAGE_VERSION */
+  png_uint_32 width;   /* Image width in pixels (columns) */
+  png_uint_32 height;  /* Image height in pixels (rows) */
+  png_uint_32 format;  /* Image format as defined below */
+  png_uint_32 flags;   /* A bit mask containing informational flags */
+  png_uint_32 colormap_entries;
+/* Number of entries in the color-map */
 
-   /* In the event of an error or warning the following field will be set to a
-    * non-zero value and the 'message' field will contain a '\0' terminated
-    * string with the libpng error or warning message.  If both warnings and
-    * an error were encountered, only the error is recorded.  If there
-    * are multiple warnings, only the first one is recorded.
-    *
-    * The upper 30 bits of this value are reserved, the low two bits contain
-    * a value as follows:
-    */
-#  define PNG_IMAGE_WARNING 1
-#  define PNG_IMAGE_ERROR 2
-   /*
-    * The result is a two bit code such that a value more than 1 indicates
-    * a failure in the API just called:
-    *
-    *    0 - no warning or error
-    *    1 - warning
-    *    2 - error
-    *    3 - error preceded by warning
-    */
-#  define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1)
+/* In the event of an error or warning the following field will be set to a
+ * non-zero value and the 'message' field will contain a '\0' terminated
+ * string with the libpng error or warning message.  If both warnings and
+ * an error were encountered, only the error is recorded.  If there
+ * are multiple warnings, only the first one is recorded.
+ *
+ * The upper 30 bits of this value are reserved, the low two bits contain
+ * a value as follows:
+ */
+#define PNG_IMAGE_WARNING 1
+#define PNG_IMAGE_ERROR 2
+/*
+ * The result is a two bit code such that a value more than 1 indicates
+ * a failure in the API just called:
+ *
+ *    0 - no warning or error
+ *    1 - warning
+ *    2 - error
+ *    3 - error preceded by warning
+ */
+#define PNG_IMAGE_FAILED(png_cntrl) \
+  ((((png_cntrl).warning_or_error) & 0x03) > 1)
 
-   png_uint_32  warning_or_error;
+  png_uint_32 warning_or_error;
 
-   char         message[64];
+  char message[64];
 } png_image, *png_imagep;
 
 /* The samples of the image have one to four channels whose components have
  * original values in the range 0 to 1.0:
  *
  * 1: A single gray or luminance channel (G).
  * 2: A gray/luminance channel and an alpha channel (GA).
  * 3: Three red, green, blue color channels (RGB).
  * 4: Three color channels and an alpha channel (RGBA).
  *
@@ skipping 50 matching lines @@
  * NOTE: libpng can be built with particular features disabled, if you see
  * compiler errors because the definition of one of the following flags has been
  * compiled out it is because libpng does not have the required support.  It is
  * possible, however, for the libpng configuration to enable the format on just
  * read or just write; in that case you may see an error at run time.  You can
  * guard against this by checking for the definition of the appropriate
  * "_SUPPORTED" macro, one of:
  *
  *    PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED
  */
-#define PNG_FORMAT_FLAG_ALPHA    0x01U /* format with an alpha channel */
-#define PNG_FORMAT_FLAG_COLOR    0x02U /* color format: otherwise grayscale */
-#define PNG_FORMAT_FLAG_LINEAR   0x04U /* 2 byte channels else 1 byte */
+#define PNG_FORMAT_FLAG_ALPHA 0x01U    /* format with an alpha channel */
+#define PNG_FORMAT_FLAG_COLOR 0x02U    /* color format: otherwise grayscale */
+#define PNG_FORMAT_FLAG_LINEAR 0x04U   /* 2 byte channels else 1 byte */
 #define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */
 
 #ifdef PNG_FORMAT_BGR_SUPPORTED
-#  define PNG_FORMAT_FLAG_BGR    0x10U /* BGR colors, else order is RGB */
+#define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */
 #endif
 
 #ifdef PNG_FORMAT_AFIRST_SUPPORTED
-#  define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */
+#define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */
 #endif
 
 /* Commonly used formats have predefined macros.
  *
  * First the single byte (sRGB) formats:
  */
 #define PNG_FORMAT_GRAY 0
-#define PNG_FORMAT_GA   PNG_FORMAT_FLAG_ALPHA
-#define PNG_FORMAT_AG   (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST)
-#define PNG_FORMAT_RGB  PNG_FORMAT_FLAG_COLOR
-#define PNG_FORMAT_BGR  (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR)
-#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA)
-#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST)
-#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA)
-#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST)
+#define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA
+#define PNG_FORMAT_AG (PNG_FORMAT_GA | PNG_FORMAT_FLAG_AFIRST)
+#define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR
+#define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR | PNG_FORMAT_FLAG_BGR)
+#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB | PNG_FORMAT_FLAG_ALPHA)
+#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA | PNG_FORMAT_FLAG_AFIRST)
+#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR | PNG_FORMAT_FLAG_ALPHA)
+#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA | PNG_FORMAT_FLAG_AFIRST)
 
 /* Then the linear 2-byte formats.  When naming these "Y" is used to
  * indicate a luminance (gray) channel.
  */
 #define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR
-#define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA)
-#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR)
+#define PNG_FORMAT_LINEAR_Y_ALPHA \
+  (PNG_FORMAT_FLAG_LINEAR | PNG_FORMAT_FLAG_ALPHA)
+#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR | PNG_FORMAT_FLAG_COLOR)
 #define PNG_FORMAT_LINEAR_RGB_ALPHA \
-   (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA)
+  (PNG_FORMAT_FLAG_LINEAR | PNG_FORMAT_FLAG_COLOR | PNG_FORMAT_FLAG_ALPHA)
 
 /* With color-mapped formats the image data is one byte for each pixel, the byte
  * is an index into the color-map which is formatted as above.  To obtain a
  * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP
  * to one of the above definitions, or you can use one of the definitions below.
  */
-#define PNG_FORMAT_RGB_COLORMAP  (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP)
-#define PNG_FORMAT_BGR_COLORMAP  (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP)
-#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP)
-#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP)
-#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP)
-#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB | PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR | PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA | PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB | PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA | PNG_FORMAT_FLAG_COLORMAP)
+#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR | PNG_FORMAT_FLAG_COLORMAP)
 
 /* PNG_IMAGE macros
  *
  * These are convenience macros to derive information from a png_image
  * structure.  The PNG_IMAGE_SAMPLE_ macros return values appropriate to the
  * actual image sample values - either the entries in the color-map or the
  * pixels in the image.  The PNG_IMAGE_PIXEL_ macros return corresponding values
  * for the pixels and will always return 1 for color-mapped formats.  The
  * remaining macros return information about the rows in the image and the
  * complete image.
  *
  * NOTE: All the macros that take a png_image::format parameter are compile time
  * constants if the format parameter is, itself, a constant.  Therefore these
  * macros can be used in array declarations and case labels where required.
  * Similarly the macros are also pre-processor constants (sizeof is not used) so
  * they can be used in #if tests.
  *
  * First the information about the samples.
  */
-#define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\
-   (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1)
-   /* Return the total number of channels in a given format: 1..4 */
+#define PNG_IMAGE_SAMPLE_CHANNELS(fmt) \
+  (((fmt) & (PNG_FORMAT_FLAG_COLOR | PNG_FORMAT_FLAG_ALPHA)) + 1)
+/* Return the total number of channels in a given format: 1..4 */
 
-#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\
-   ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1)
-   /* Return the size in bytes of a single component of a pixel or color-map
-    * entry (as appropriate) in the image: 1 or 2.
-    */
+#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt) \
+  ((((fmt)&PNG_FORMAT_FLAG_LINEAR) >> 2) + 1)
+/* Return the size in bytes of a single component of a pixel or color-map
+ * entry (as appropriate) in the image: 1 or 2.
+ */
 
-#define PNG_IMAGE_SAMPLE_SIZE(fmt)\
-   (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt))
-   /* This is the size of the sample data for one sample.  If the image is
-    * color-mapped it is the size of one color-map entry (and image pixels are
-    * one byte in size), otherwise it is the size of one image pixel.
-    */
+#define PNG_IMAGE_SAMPLE_SIZE(fmt) \
+  (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt))
+/* This is the size of the sample data for one sample.  If the image is
+ * color-mapped it is the size of one color-map entry (and image pixels are
+ * one byte in size), otherwise it is the size of one image pixel.
+ */
 
-#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\
-   (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256)
-   /* The maximum size of the color-map required by the format expressed in a
-    * count of components.  This can be used to compile-time allocate a
-    * color-map:
-    *
-    * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)];
-    *
-    * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)];
-    *
-    * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the
-    * information from one of the png_image_begin_read_ APIs and dynamically
-    * allocate the required memory.
-    */
+#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt) \
+  (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256)
+/* The maximum size of the color-map required by the format expressed in a
+ * count of components.  This can be used to compile-time allocate a
+ * color-map:
+ *
+ * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)];
+ *
+ * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)];
+ *
+ * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the
+ * information from one of the png_image_begin_read_ APIs and dynamically
+ * allocate the required memory.
+ */
 
 /* Corresponding information about the pixels */
-#define PNG_IMAGE_PIXEL_(test,fmt)\
-   (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt))
+#define PNG_IMAGE_PIXEL_(test, fmt) \
+  (((fmt)&PNG_FORMAT_FLAG_COLORMAP) ? 1 : test(fmt))
 
-#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\
-   PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt)
-   /* The number of separate channels (components) in a pixel; 1 for a
-    * color-mapped image.
-    */
+#define PNG_IMAGE_PIXEL_CHANNELS(fmt) \
+  PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS, fmt)
+/* The number of separate channels (components) in a pixel; 1 for a
+ * color-mapped image.
+ */
 
-#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\
-   PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt)
-   /* The size, in bytes, of each component in a pixel; 1 for a color-mapped
-    * image.
-    */
+#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt) \
+  PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE, fmt)
+/* The size, in bytes, of each component in a pixel; 1 for a color-mapped
+ * image.
+ */
 
-#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt)
-   /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */
+#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE, fmt)
+/* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */
 
 /* Information about the whole row, or whole image */
-#define PNG_IMAGE_ROW_STRIDE(image)\
-   (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width)
-   /* Return the total number of components in a single row of the image; this
-    * is the minimum 'row stride', the minimum count of components between each
-    * row.  For a color-mapped image this is the minimum number of bytes in a
-    * row.
-    */
+#define PNG_IMAGE_ROW_STRIDE(image) \
+  (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width)
+/* Return the total number of components in a single row of the image; this
+ * is the minimum 'row stride', the minimum count of components between each
+ * row.  For a color-mapped image this is the minimum number of bytes in a
+ * row.
+ */
 
-#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\
-   (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride))
-   /* Return the size, in bytes, of an image buffer given a png_image and a row
-    * stride - the number of components to leave space for in each row.
-    */
+#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)                     \
+  (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format) * (image).height * \
+   (row_stride))
+/* Return the size, in bytes, of an image buffer given a png_image and a row
+ * stride - the number of components to leave space for in each row.
+ */
 
-#define PNG_IMAGE_SIZE(image)\
-   PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image))
-   /* Return the size, in bytes, of the image in memory given just a png_image;
-    * the row stride is the minimum stride required for the image.
-    */
+#define PNG_IMAGE_SIZE(image) \
+  PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image))
+/* Return the size, in bytes, of the image in memory given just a png_image;
+ * the row stride is the minimum stride required for the image.
+ */
 
-#define PNG_IMAGE_COLORMAP_SIZE(image)\
-   (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries)
-   /* Return the size, in bytes, of the color-map of this image.  If the image
-    * format is not a color-map format this will return a size sufficient for
-    * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if
-    * you don't want to allocate a color-map in this case.
-    */
+#define PNG_IMAGE_COLORMAP_SIZE(image) \
+  (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries)
+/* Return the size, in bytes, of the color-map of this image.  If the image
+ * format is not a color-map format this will return a size sufficient for
+ * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if
+ * you don't want to allocate a color-map in this case.
+ */
 
 /* PNG_IMAGE_FLAG_*
  *
  * Flags containing additional information about the image are held in the
  * 'flags' field of png_image.
  */
 #define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01
-   /* This indicates the the RGB values of the in-memory bitmap do not
-    * correspond to the red, green and blue end-points defined by sRGB.
-    */
+/* This indicates the the RGB values of the in-memory bitmap do not
+ * correspond to the red, green and blue end-points defined by sRGB.
+ */
 
 #define PNG_IMAGE_FLAG_FAST 0x02
-   /* On write emphasise speed over compression; the resultant PNG file will be
-    * larger but will be produced significantly faster, particular for large
-    * images.  Do not use this option for images which will be distributed, only
-    * used it when producing intermediate files that will be read back in
-    * repeatedly.  For a typical 24-bit image the option will double the read
-    * speed at the cost of increasing the image size by 25%, however for many
-    * more compressible images the PNG file can be 10 times larger with only a
-    * slight speed gain.
-    */
+/* On write emphasise speed over compression; the resultant PNG file will be
+ * larger but will be produced significantly faster, particular for large
+ * images.  Do not use this option for images which will be distributed, only
+ * used it when producing intermediate files that will be read back in
+ * repeatedly.  For a typical 24-bit image the option will double the read
+ * speed at the cost of increasing the image size by 25%, however for many
+ * more compressible images the PNG file can be 10 times larger with only a
+ * slight speed gain.
+ */
 
 #define PNG_IMAGE_FLAG_16BIT_sRGB 0x04
-   /* On read if the image is a 16-bit per component image and there is no gAMA
-    * or sRGB chunk assume that the components are sRGB encoded.  Notice that
-    * images output by the simplified API always have gamma information; setting
-    * this flag only affects the interpretation of 16-bit images from an
-    * external source.  It is recommended that the application expose this flag
-    * to the user; the user can normally easily recognize the difference between
-    * linear and sRGB encoding.  This flag has no effect on write - the data
-    * passed to the write APIs must have the correct encoding (as defined
-    * above.)
-    *
-    * If the flag is not set (the default) input 16-bit per component data is
-    * assumed to be linear.
-    *
-    * NOTE: the flag can only be set after the png_image_begin_read_ call,
-    * because that call initializes the 'flags' field.
-    */
+/* On read if the image is a 16-bit per component image and there is no gAMA
+ * or sRGB chunk assume that the components are sRGB encoded.  Notice that
+ * images output by the simplified API always have gamma information; setting
+ * this flag only affects the interpretation of 16-bit images from an
+ * external source.  It is recommended that the application expose this flag
+ * to the user; the user can normally easily recognize the difference between
+ * linear and sRGB encoding.  This flag has no effect on write - the data
+ * passed to the write APIs must have the correct encoding (as defined
+ * above.)
+ *
+ * If the flag is not set (the default) input 16-bit per component data is
+ * assumed to be linear.
+ *
+ * NOTE: the flag can only be set after the png_image_begin_read_ call,
+ * because that call initializes the 'flags' field.
+ */
 
 #ifdef PNG_SIMPLIFIED_READ_SUPPORTED
 /* READ APIs
  * ---------
  *
  * The png_image passed to the read APIs must have been initialized by setting
  * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.)
  */
 #ifdef PNG_STDIO_SUPPORTED
-PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image,
-   const char *file_name));
-   /* The named file is opened for read and the image header is filled in
-    * from the PNG header in the file.
-    */
+PNG_EXPORT(234,
+           int,
+           png_image_begin_read_from_file,
+           (png_imagep image, const char* file_name));
+/* The named file is opened for read and the image header is filled in
+ * from the PNG header in the file.
+ */
 
-PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image,
-   FILE* file));
-   /* The PNG header is read from the stdio FILE object. */
+PNG_EXPORT(235,
+           int,
+           png_image_begin_read_from_stdio,
+           (png_imagep image, FILE* file));
+/* The PNG header is read from the stdio FILE object. */
 #endif /* PNG_STDIO_SUPPORTED */
 
-PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image,
-   png_const_voidp memory, png_size_t size));
-   /* The PNG header is read from the given memory buffer. */
+PNG_EXPORT(236,
+           int,
+           png_image_begin_read_from_memory,
+           (png_imagep image, png_const_voidp memory, png_size_t size));
+/* The PNG header is read from the given memory buffer. */
 
-PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image,
-   png_const_colorp background, void *buffer, png_int_32 row_stride,
-   void *colormap));
-   /* Finish reading the image into the supplied buffer and clean up the
-    * png_image structure.
-    *
-    * row_stride is the step, in byte or 2-byte units as appropriate,
-    * between adjacent rows.  A positive stride indicates that the top-most row
-    * is first in the buffer - the normal top-down arrangement.  A negative
-    * stride indicates that the bottom-most row is first in the buffer.
-    *
-    * background need only be supplied if an alpha channel must be removed from
-    * a png_byte format and the removal is to be done by compositing on a solid
-    * color; otherwise it may be NULL and any composition will be done directly
-    * onto the buffer.  The value is an sRGB color to use for the background,
-    * for grayscale output the green channel is used.
-    *
-    * background must be supplied when an alpha channel must be removed from a
-    * single byte color-mapped output format, in other words if:
-    *
-    * 1) The original format from png_image_begin_read_from_* had
-    *    PNG_FORMAT_FLAG_ALPHA set.
-    * 2) The format set by the application does not.
-    * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and
-    *    PNG_FORMAT_FLAG_LINEAR *not* set.
-    *
-    * For linear output removing the alpha channel is always done by compositing
-    * on black and background is ignored.
-    *
-    * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set.  It must
-    * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE.
-    * image->colormap_entries will be updated to the actual number of entries
-    * written to the colormap; this may be less than the original value.
-    */
+PNG_EXPORT(237,
+           int,
+           png_image_finish_read,
+           (png_imagep image,
+            png_const_colorp background,
+            void* buffer,
+            png_int_32 row_stride,
+            void* colormap));
+/* Finish reading the image into the supplied buffer and clean up the
+ * png_image structure.
+ *
+ * row_stride is the step, in byte or 2-byte units as appropriate,
+ * between adjacent rows.  A positive stride indicates that the top-most row
+ * is first in the buffer - the normal top-down arrangement.  A negative
+ * stride indicates that the bottom-most row is first in the buffer.
+ *
+ * background need only be supplied if an alpha channel must be removed from
+ * a png_byte format and the removal is to be done by compositing on a solid
+ * color; otherwise it may be NULL and any composition will be done directly
+ * onto the buffer.  The value is an sRGB color to use for the background,
+ * for grayscale output the green channel is used.
+ *
+ * background must be supplied when an alpha channel must be removed from a
+ * single byte color-mapped output format, in other words if:
+ *
+ * 1) The original format from png_image_begin_read_from_* had
+ *    PNG_FORMAT_FLAG_ALPHA set.
+ * 2) The format set by the application does not.
+ * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and
+ *    PNG_FORMAT_FLAG_LINEAR *not* set.
+ *
+ * For linear output removing the alpha channel is always done by compositing
+ * on black and background is ignored.
+ *
+ * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set.  It must
+ * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE.
+ * image->colormap_entries will be updated to the actual number of entries
+ * written to the colormap; this may be less than the original value.
+ */
 
 PNG_EXPORT(238, void, png_image_free, (png_imagep image));
-   /* Free any data allocated by libpng in image->opaque, setting the pointer to
-    * NULL.  May be called at any time after the structure is initialized.
-    */
+/* Free any data allocated by libpng in image->opaque, setting the pointer to
+ * NULL.  May be called at any time after the structure is initialized.
+ */
 #endif /* PNG_SIMPLIFIED_READ_SUPPORTED */
 
 #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
 #ifdef PNG_STDIO_SUPPORTED
 /* WRITE APIS
  * ----------
  * For write you must initialize a png_image structure to describe the image to
  * be written.  To do this use memset to set the whole structure to 0 then
  * initialize fields describing your image.
  *
  * version: must be set to PNG_IMAGE_VERSION
  * opaque: must be initialized to NULL
  * width: image width in pixels
  * height: image height in rows
  * format: the format of the data (image and color-map) you wish to write
  * flags: set to 0 unless one of the defined flags applies; set
  *    PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB
  *    values do not correspond to the colors in sRGB.
  * colormap_entries: set to the number of entries in the color-map (0 to 256)
  */
-PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image,
-   const char *file, int convert_to_8bit, const void *buffer,
-   png_int_32 row_stride, const void *colormap));
-   /* Write the image to the named file. */
+PNG_EXPORT(239,
+           int,
+           png_image_write_to_file,
+           (png_imagep image,
+            const char* file,
+            int convert_to_8bit,
+            const void* buffer,
+            png_int_32 row_stride,
+            const void* colormap));
+/* Write the image to the named file. */
 
-PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
-   int convert_to_8_bit, const void *buffer, png_int_32 row_stride,
-   const void *colormap));
-   /* Write the image to the given (FILE*). */
+PNG_EXPORT(240,
+           int,
+           png_image_write_to_stdio,
+           (png_imagep image,
+            FILE* file,
+            int convert_to_8_bit,
+            const void* buffer,
+            png_int_32 row_stride,
+            const void* colormap));
+/* Write the image to the given (FILE*). */
 
 /* With both write APIs if image is in one of the linear formats with 16-bit
  * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG
  * gamma encoded according to the sRGB specification, otherwise a 16-bit linear
  * encoded PNG file is written.
  *
  * With color-mapped data formats the colormap parameter point to a color-map
  * with at least image->colormap_entries encoded in the specified format.  If
  * the format is linear the written PNG color-map will be converted to sRGB
  * regardless of the convert_to_8_bit flag.
  *
  * With all APIs row_stride is handled as in the read APIs - it is the spacing
  * from one row to the next in component sized units (1 or 2 bytes) and if
  * negative indicates a bottom-up row layout in the buffer.
  *
  * Note that the write API does not support interlacing or sub-8-bit pixels.
  */
 #endif /* PNG_STDIO_SUPPORTED */
 #endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */
 /*******************************************************************************
  *  END OF SIMPLIFIED API
  ******************************************************************************/
 
 #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
-PNG_EXPORT(242, void, png_set_check_for_invalid_index,
-    (png_structrp png_ptr, int allowed));
-#  ifdef PNG_GET_PALETTE_MAX_SUPPORTED
-PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr,
-    png_const_infop info_ptr));
-#  endif
+PNG_EXPORT(242,
+           void,
+           png_set_check_for_invalid_index,
+           (png_structrp png_ptr, int allowed));
+#ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+PNG_EXPORT(243,
+           int,
+           png_get_palette_max,
+           (png_const_structp png_ptr, png_const_infop info_ptr));
+#endif
 #endif /* CHECK_FOR_INVALID_INDEX */
 
 /*******************************************************************************
  *  IMPLEMENTATION OPTIONS
  *******************************************************************************
  *
  * Support for arbitrary implementation-specific optimizations.  The API allows
  * particular options to be turned on or off.  'Option' is the number of the
  * option and 'onoff' is 0 (off) or non-0 (on).  The value returned is given
  * by the PNG_OPTION_ defines below.
  *
  * HARDWARE: normally hardware capabilites, such as the Intel SSE instructions,
  *           are detected at run time, however sometimes it may be impossible
  *           to do this in user mode, in which case it is necessary to discover
  *           the capabilities in an OS specific way.  Such capabilities are
  *           listed here when libpng has support for them and must be turned
  *           ON by the application if present.
  *
  * SOFTWARE: sometimes software optimizations actually result in performance
  *           decrease on some architectures or systems, or with some sets of
  *           PNG images.  'Software' options allow such optimizations to be
  *           selected at run time.
  */
 #ifdef PNG_SET_OPTION_SUPPORTED
 #ifdef PNG_ARM_NEON_API_SUPPORTED
-#  define PNG_ARM_NEON   0 /* HARDWARE: ARM Neon SIMD instructions supported */
+#define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */
 #endif
 #define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */
-#define PNG_OPTION_NEXT  4 /* Next option - numbers must be even */
+#define PNG_OPTION_NEXT 4            /* Next option - numbers must be even */
 
 /* Return values: NOTE: there are four values and 'off' is *not* zero */
-#define PNG_OPTION_UNSET   0 /* Unset - defaults to off */
+#define PNG_OPTION_UNSET 0   /* Unset - defaults to off */
 #define PNG_OPTION_INVALID 1 /* Option number out of range */
-#define PNG_OPTION_OFF     2
-#define PNG_OPTION_ON      3
+#define PNG_OPTION_OFF 2
+#define PNG_OPTION_ON 3
 
-PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
-   int onoff));
+PNG_EXPORT(244,
+           int,
+           png_set_option,
+           (png_structrp png_ptr, int option, int onoff));
 #endif
 
 /*******************************************************************************
  *  END OF HARDWARE OPTIONS
  ******************************************************************************/
 
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project
  * defs, scripts/pnglibconf.h, and scripts/pnglibconf.h.prebuilt
  */
 
 /* The last ordinal number (this is the *last* one already used; the next
  * one to use is one more than this.)  Maintainer, remember to add an entry to
  * scripts/symbols.def as well.
  */
 #ifdef PNG_EXPORT_LAST_ORDINAL
-  PNG_EXPORT_LAST_ORDINAL(244);
+PNG_EXPORT_LAST_ORDINAL(244);
 #endif
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* PNG_VERSION_INFO_ONLY */
 /* Do not put anything past this line */
 #endif /* PNG_H */