diff --git a/ANNOUNCE b/ANNOUNCE
index cb380d0..82c530e 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,58 +1,95 @@
 
-Libpng 1.0.37 - May 9, 2008
+Libpng 1.0.38rc01 - July 17, 2008
 
-This is a public release of libpng, intended for use in production codes.
+This is not intended to be a public release.  It will be replaced
+within a few weeks by a public version or by another test version.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.0.37.tar.gz
-   libpng-1.0.37.tar.lzma
+   libpng-1.0.38rc01.tar.gz
+   libpng-1.0.38rc01.tar.lzma
      (Get the lzma codec from <http://tukaani.org/lzma>).
-   libpng-1.0.37.tar.bz2
+   libpng-1.0.38rc01.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.0.37-no-config.tar.gz
-   libpng-1.0.37-no-config.tar.lzma
-   libpng-1.0.37-no-config.tar.bz2
+   libpng-1.0.38rc01-no-config.tar.gz
+   libpng-1.0.38rc01-no-config.tar.lzma
+   libpng-1.0.38rc01-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1037.zip
-   lpng1037.7z
-   lpng1037.tar.bz2
+   lp1038r01.zip
+   lp1038r01.7z
+   lp1038r01.tar.bz2
 
 Project files
 
-   libpng-1.0.37-project-netware.zip
-   libpng-1.0.37-project-wince.zip
+   libpng-1.0.38rc01-project-netware.zip
+   libpng-1.0.38rc01-project-wince.zip
 
 Other information:
 
-   libpng-1.0.37-README.txt
-   libpng-1.0.37-KNOWNBUGS.txt
-   libpng-1.0.37-LICENSE.txt
-   libpng-1.0.37-Y2K-compliance.txt
+   libpng-1.0.38rc01-README.txt
+   libpng-1.0.38rc01-KNOWNBUGS.txt
+   libpng-1.0.38rc01-LICENSE.txt
+   libpng-1.0.38rc01-Y2K-compliance.txt
+   libpng-1.0.38rc01-[previous version]-diff.txt
 
-Changes since the last public release (1.0.34):
+Changes since the last public release (1.0.37):
 
-version 1.0.37 [May 9, 2008]
-
+version 1.2.29beta01 [May 1, 2008]
   Removed some stray *.diff and *.orig files
+
+version 1.2.29beta02 [May 1, 2008]
   Reverted Makefile.in, aclocal.m4, and configure to the libpng-1.2.26
     versions.
+
+version 1.2.29beta03 [May 2, 2008]
   Added --force to autogen libtoolize options and --force-missing to
     automake options.
   Changed $(ECHO) to echo in Makefile.am and Makefile.in
   Updated all configure files to autoconf-2.62
   #ifdef out pnggcrd.c code if using MSC_VER
 
+version 1.2.29rc01 [May 4, 2008]
+  No changes.
+
+version 1.0.35 and 1.2.29 [May 8, 2008]
+  No changes.
+
+version 1.0.37 [May 9, 2008]
+  Updated Makefile.in and configure (omitted version 1.0.36).
+
+version 1.2.30beta01 [May 29, 2008]
+  Updated libpng.pc-configure.in and libpng-config.in per debian bug reports.
+
+version 1.2.30beta02 [June 25, 2008]
+  Restored png_flush(png_ptr) at the end of png_write_end(), that was
+    removed from libpng-1.0.9beta03.
+
+version 1.2.30beta03 [July 6, 2008]
+  Merged some cosmetic whitespace changes from libpng-1.4.0beta19.
+  Inline call of png_get_uint_32() in png_get_uint_31(), as in 1.4.0beta19.
+  Added demo of decoding vpAg and sTER chunks to pngtest.c, from 1.4.0beta19.
+  Changed PNGMAJ from 0 to 12 in makefile.darwin, which does not like 0.
+  Added new private function png_read_chunk_header() from 1.4.0beta19.
+  Merge reading of chunk length and chunk type into a single 8-byte read.
+  Merge writing of chunk length and chunk type into a single 8-byte write.
+
+version 1.2.30beta04 [July 10, 2008]
+  Merged more cosmetic whitespace changes from libpng-1.4.0beta19.
+
+version 1.0.38rc01, 1.2.30rc01 [July 17, 2008]
+  No changes.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+
 (subscription required; visit 
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
 to subscribe) or to glennrp at users.sourceforge.net
diff --git a/CHANGES b/CHANGES
index e9a0a3d..b972f1c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2156,6 +2156,28 @@
 version 1.0.37 [May 9, 2008]
   Updated Makefile.in and configure (omitted version 1.0.36).
 
+version 1.2.30beta01 [May 29, 2008]
+  Updated libpng.pc-configure.in and libpng-config.in per debian bug reports.
+
+version 1.2.30beta02 [June 25, 2008]
+  Restored png_flush(png_ptr) at the end of png_write_end(), that was
+    removed from libpng-1.0.9beta03.
+
+version 1.2.30beta03 [July 6, 2008]
+  Merged some cosmetic whitespace changes from libpng-1.4.0beta19.
+  Inline call of png_get_uint_32() in png_get_uint_31(), as in 1.4.0beta19.
+  Added demo of decoding vpAg and sTER chunks to pngtest.c, from 1.4.0beta19.
+  Changed PNGMAJ from 0 to 12 in makefile.darwin, which does not like 0.
+  Added new private function png_read_chunk_header() from 1.4.0beta19.
+  Merge reading of chunk length and chunk type into a single 8-byte read.
+  Merge writing of chunk length and chunk type into a single 8-byte write.
+
+version 1.2.30beta04 [July 10, 2008]
+  Merged more cosmetic whitespace changes from libpng-1.4.0beta19.
+
+version 1.0.38rc01, 1.2.30rc01 [July 17, 2008]
+  No changes.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/INSTALL b/INSTALL
index 0f01acd..ff11ead 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.37 - May 9, 2008
+Installing libpng version 1.0.38rc01 - July 17, 2008
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -44,7 +44,7 @@
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.0.37" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.0.38rc01" or "lpng109" and "zlib-1.2.1"
 or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -101,9 +101,9 @@
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng10.so.0.1.0.37)
+                       gcc, creates libpng10.so.0.1.0.38rc01)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng10.so.0.1.0.37)
+                       (gcc, creates libpng10.so.0.1.0.38rc01)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -125,14 +125,14 @@
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng10.so.0.1.0.37)
+                       creates libpng10.so.0.1.0.38rc01)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.37)
+                       creates libpng10.so.0.1.0.38rc01)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng10.so.0.1.0.37)
+                       creates libpng10.so.0.1.0.38rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng10.so.0.1.0.37)
+                       creates libpng10.so.0.1.0.38rc01)
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
  makefile.64sunu   =>  Sun Ultra 64-bit makefile
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
diff --git a/KNOWNBUG b/KNOWNBUG
index 0a5e04e..19e3e6e 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.0.37
+Known bugs in libpng version 1.0.38rc01
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 
diff --git a/LICENSE b/LICENSE
index 6b19b7d..485c727 100644
--- a/LICENSE
+++ b/LICENSE
@@ -8,7 +8,7 @@
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.37, May 9, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.38rc01, July 17, 2008, are
 Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -106,4 +106,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-May 9, 2008
+July 17, 2008
diff --git a/Makefile.am b/Makefile.am
index df1d7b5..5794e88 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,7 +86,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.37.txt pngvcrd.c 
+	example.c libpng-1.0.38rc01.txt pngvcrd.c 
 
 CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 0a5f55a..9237b44 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -331,7 +331,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.0.37.txt pngvcrd.c 
+	example.c libpng-1.0.38rc01.txt pngvcrd.c 
 
 CLEANFILES = pngout.png libpng10.pc libpng10-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index 836022a..46d1886 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.0.37 - May 9, 2008 (shared library 10.0)
+README for libpng version 1.0.38rc01 - July 17, 2008 (shared library 10.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -6,7 +6,10 @@
 Libpng comes in several distribution formats.  Get libpng-*.tar.gz,
 libpng-*.tar.lzma, or libpng-*.tar.bz2 if you want UNIX-style line
 endings in the text files, or lpng*.7z or lpng*.zip if you want DOS-style
-line endings.
+line endings.  You can get UNIX-style line endings from the *.zip file
+by using "unzip -a" but there seems to be no simple way to recover
+UNIX-style line endings from the *.7z file.  The *.tar.lzma file is
+recommended for *NIX users instead.
 
 Version 0.89 was the first official release of libpng.  Don't let the
 fact that it's the first release fool you.  The libpng library has been in
@@ -55,7 +58,7 @@
 critical or an ancillary chunk.
 
 The changes made to the library, and bugs fixed are based on discussions
-on the PNG-implement mailing list
+on the png-mng-implement mailing list
 and not on material submitted privately to Guy, Andreas, or Glenn.  They will
 forward any good suggestions to the list.
 
@@ -111,14 +114,14 @@
 
 You can't reach Guy, the original libpng author, at the addresses
 given in previous versions of this document.  He and Andreas will read mail
-addressed to the png-implement list, however.
+addressed to the png-mng-implement list, however.
 
 Please do not send general questions about PNG.  Send them to
 the (png-mng-misc at lists.sourceforge.net, subscription required, visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement to subscribe)
 On the other hand,
 please do not send libpng questions to that address, send them to me
-or to the png-implement list.  I'll
+or to the png-mng-implement list.  I'll
 get them in the end anyway.  If you have a question about something
 in the PNG specification that is related to using libpng, send it
 to me.  Send me any questions that start with "I was using libpng,
@@ -191,11 +194,11 @@
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng10.so.0.1.0.37)
+                            gcc, creates libpng10.so.0.1.0.38rc01)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.37)
+                            (gcc, creates libpng10.so.0.1.0.38rc01)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng10.so.0.1.0.37,
+                            (gcc, creates libpng10.so.0.1.0.38rc01,
                             uses assembler code tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -217,12 +220,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng10.so.0.1.0.37)
+                            (gcc, creates libpng10.so.0.1.0.38rc01)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng10.so.0.1.0.37)
+                            (gcc, creates libpng10.so.0.1.0.38rc01)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng10.so.0.1.0.37)
+                            (gcc, creates libpng10.so.0.1.0.38rc01)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
diff --git a/Y2KINFO b/Y2KINFO
index 78a3701..a5d2fbe 100644
--- a/Y2KINFO
+++ b/Y2KINFO
@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      May 9, 2008
+      July 17, 2008
 
       Since the PNG Development group is an ad-hoc body, we can't make
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.0.37 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.38rc01 are Y2K compliant.  It is my belief that earlier
       versions were also Y2K compliant.
 
       Libpng only has three year fields.  One is a 2-byte unsigned integer
diff --git a/configure b/configure
index dddd9b1..3d87f47 100755
--- a/configure
+++ b/configure
Binary files differ
diff --git a/configure.ac b/configure.ac
index e583ef6..6e0e044 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,15 +18,15 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.0.37], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.0.38rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.0.37
+PNGLIB_VERSION=1.0.38rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=0
-PNGLIB_RELEASE=37
+PNGLIB_RELEASE=38
 
 dnl End of version number stuff
 
diff --git a/example.c b/example.c
index 0815873..ad80aff 100644
--- a/example.c
+++ b/example.c
@@ -2,9 +2,9 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.2.1 December 7, 2001.
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * This file has been placed in the public domain by the authors.
- * Maintained 1998-2007 Glenn Randers-Pehrson
+ * Maintained 1998-2008 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
  * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
@@ -505,7 +505,7 @@
  * shown below:
  */
    /* Check if row_num is in bounds. */
-   if((row_num >= 0) && (row_num < height))
+   if ((row_num >= 0) && (row_num < height))
    {
      /* Get pointer to corresponding row in our
       * PNG read buffer.
@@ -515,7 +515,7 @@
      /* If both rows are allocated then copy the new row
       * data to the corresponding row data.
       */
-     if((old_row != NULL) && (new_row != NULL))
+     if ((old_row != NULL) && (new_row != NULL))
      png_progressive_combine_row(png_ptr, old_row, new_row);
    }
 /*
@@ -637,7 +637,7 @@
 
    /* set the palette if there is one.  REQUIRED for indexed-color images */
    palette = (png_colorp)png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH
-             * png_sizeof (png_color));
+             * png_sizeof(png_color));
    /* ... set palette colors ... */
    png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH);
    /* You must not free palette here, because png_set_PLTE only makes a link to
diff --git a/libpng-1.0.37.txt b/libpng-1.0.38rc01.txt
similarity index 99%
rename from libpng-1.0.37.txt
rename to libpng-1.0.38rc01.txt
index a531780..8af317a 100644
--- a/libpng-1.0.37.txt
+++ b/libpng-1.0.38rc01.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.37 - May 9, 2008
+ libpng version 1.0.38rc01 - July 17, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
@@ -9,7 +9,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.37 - May 9, 2008
+ libpng versions 0.97, January 1998, through 1.0.38rc01 - July 17, 2008
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
@@ -2815,13 +2815,13 @@
 
 VIII. Y2K Compliance in libpng
 
-May 9, 2008
+July 17, 2008
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.37 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.38rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
diff --git a/libpng.3 b/libpng.3
index 0a33e4e..924729c 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,404 +1,815 @@
-.TH LIBPNG 3 "May 9, 2008"
+.TH LIBPNG 3 "July 17, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.37
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.38rc01
 .SH SYNOPSIS
-\fB
-#include <png.h>\fP
+\fI\fB
+
+\fB#include <png.h>\fP
+
+\fI\fB
 
 \fBpng_uint_32 png_access_version_number \fI(void\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_check_sig (png_bytep \fP\fIsig\fP\fB, int \fInum\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_chunk_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_chunk_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_convert_from_struct_tm (png_timep \fP\fIptime\fP\fB, struct tm FAR * \fIttime\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_convert_from_time_t (png_timep \fP\fIptime\fP\fB, time_t \fIttime\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_charp png_convert_to_rfc1123 (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fIptime\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_infop png_create_info_struct (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_structp png_create_read_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_structp png_create_read_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_structp png_create_write_struct (png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarn_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_structp png_create_write_struct_2(png_const_charp \fP\fIuser_png_ver\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fP\fIwarn_fn\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_debug(int \fP\fIlevel\fP\fB, png_const_charp \fImessage\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_debug1(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fIp1\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_debug2(int \fP\fIlevel\fP\fB, png_const_charp \fP\fImessage\fP\fB, \fP\fIp1\fP\fB, \fIp2\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_destroy_info_struct (png_structp \fP\fIpng_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_destroy_read_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fP\fIinfo_ptr_ptr\fP\fB, png_infopp \fIend_info_ptr_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_destroy_write_struct (png_structpp \fP\fIpng_ptr_ptr\fP\fB, png_infopp \fIinfo_ptr_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_error (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fIerror\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_free (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_free_chunk_list (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_free_default(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fIptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_free_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fInum\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_bit_depth (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fI*background\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_channels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fI*white_x\fP\fB, double \fP\fI*white_y\fP\fB, double \fP\fI*red_x\fP\fB, double \fP\fI*red_y\fP\fB, double \fP\fI*green_x\fP\fB, double \fP\fI*green_y\fP\fB, double \fP\fI*blue_x\fP\fB, double \fI*blue_y\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*white_x\fP\fB, png_uint_32 \fP\fI*white_y\fP\fB, png_uint_32 \fP\fI*red_x\fP\fB, png_uint_32 \fP\fI*red_y\fP\fB, png_uint_32 \fP\fI*green_x\fP\fB, png_uint_32 \fP\fI*green_y\fP\fB, png_uint_32 \fP\fI*blue_x\fP\fB, png_uint_32 \fI*blue_y\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_color_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_compression_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_copyright (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_error_ptr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_filter_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fI*file_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fI*int_file_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_header_ver (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_header_version (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_charpp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*width\fP\fB, png_uint_32 \fP\fI*height\fP\fB, int \fP\fI*bit_depth\fP\fB, int \fP\fI*color_type\fP\fB, int \fP\fI*interlace_type\fP\fB, int \fP\fI*compression_type\fP\fB, int \fI*filter_type\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_image_height (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_image_width (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
-\fB#if !defined(PNG_1_0_X) png_int_32 png_get_int_32 (png_bytep buf); \fI#endif
+\fI\fB
+
+\fB#if \fI!defined(PNG_1_0_X)
+
+\fBpng_int_32 png_get_int_32 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB#endif
+
+\fI\fB
 
 \fBpng_byte png_get_interlace_type (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_io_ptr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_byte png_get_libpng_ver (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_mem_ptr(png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fI*purpose\fP\fB, png_int_32 \fP\fI*X0\fP\fB, png_int_32 \fP\fI*X1\fP\fB, int \fP\fI*type\fP\fB, int \fP\fI*nparams\fP\fB, png_charp \fP\fI*units\fP\fB, png_charpp \fI*params\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*res_x\fP\fB, png_uint_32 \fP\fI*res_y\fP\fB, int \fI*unit_type\fP\fB);\fP
 
+\fI\fB
+
 \fBfloat png_get_pixel_aspect_ratio (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_progressive_ptr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fI*palette\fP\fB, int \fI*num_palette\fP\fB);\fP
 
-\fBpng_byte png_get_rgb_to_gray_status (png_structp png_ptr) png_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+\fI\fB
+
+\fBpng_byte png_get_rgb_to_gray_status (png_structp \fIpng_ptr)
+
+\fBpng_uint_32 png_get_rowbytes (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
 
 \fBpng_bytepp png_get_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fI*sig_bit\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_bytep png_get_signature (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fI*splt_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fI*intent\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fI*text_ptr\fP\fB, int \fI*num_text\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fI*mod_time\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fI*trans\fP\fB, int \fP\fI*num_trans\fP\fB, png_color_16p \fI*trans_values\fP\fB);\fP
 
-\fB#if !defined(PNG_1_0_X) png_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP
+\fI\fB
+
+\fB#if \fI!defined(PNG_1_0_X)
+
+\fBpng_uint_16 png_get_uint_16 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB
 
 \fBpng_uint_32 png_get_uint_31 (png_bytep \fIbuf\fP\fB);\fP
 
-\fBpng_uint_32 png_get_uint_32 (png_bytep buf); \fI#endif
+\fI\fB
+
+\fBpng_uint_32 png_get_uint_32 (png_bytep \fIbuf\fP\fB);\fP
+
+\fI\fB#endif
+
+\fI\fB
 
 \fBpng_uint_32 png_get_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkpp \fIunknowns\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_user_chunk_ptr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_user_height_max( png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_get_user_transform_ptr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_user_width_max (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_valid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIflag\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_int_32 png_get_x_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_int_32 png_get_x_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_x_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_int_32 png_get_y_offset_microns (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_int_32 png_get_y_offset_pixels (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_y_pixels_per_meter (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_get_compression_buffer_size (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_handle_as_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_info_init (png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_info_init_2 (png_infopp \fP\fIptr_ptr\fP\fB, png_size_t \fIpng_info_struct_size\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_malloc (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_malloc_default(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBvoidp png_memcpy (png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_size_t \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_memcpy_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, png_voidp \fP\fIs2\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBvoidp png_memset (png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_size_t \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_voidp png_memset_check (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIs1\fP\fB, int \fP\fIvalue\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_permit_empty_plte (png_structp \fP\fIpng_ptr\fP\fB, int \fIempty_plte_permitted\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_process_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_size\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_progressive_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIold_row\fP\fB, png_bytep \fInew_row\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_infop \fIend_info_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_read_init (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_read_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fIdisplay_row\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_bytepp \fP\fIdisplay_row\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_read_update_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
-\fB#if !defined(PNG_1_0_X) png_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP
+\fI\fB
+
+\fB#if \fI!defined(PNG_1_0_X)
+
+\fBpng_save_int_32 (png_bytep \fP\fIbuf\fP\fB, png_int_32 \fIi\fP\fB);\fP
+
+\fI\fB
 
 \fBvoid png_save_uint_16 (png_bytep \fP\fIbuf\fP\fB, unsigned int \fIi\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_save_uint_32 (png_bytep \fP\fIbuf\fP\fB, png_uint_32 \fIi\fP\fB);\fP
 
-\fBvoid png_set_add_alpha (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int flags); \fI#endif
+\fI\fB
+
+\fBvoid png_set_add_alpha (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
+
+\fI\fB#endif
+
+\fI\fB
 
 \fBvoid png_set_background (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIbackground_color\fP\fB, int \fP\fIbackground_gamma_code\fP\fB, int \fP\fIneed_expand\fP\fB, double \fIbackground_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_bgr (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_16p \fIbackground\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_level (png_structp \fP\fIpng_ptr\fP\fB, int \fIlevel\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_mem_level (png_structp \fP\fIpng_ptr\fP\fB, int \fImem_level\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_method (png_structp \fP\fIpng_ptr\fP\fB, int \fImethod\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_strategy (png_structp \fP\fIpng_ptr\fP\fB, int \fIstrategy\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_window_bits (png_structp \fP\fIpng_ptr\fP\fB, int \fIwindow_bits\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_crc_action (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcrit_action\fP\fB, int \fIancil_action\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_dither (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fP\fInum_palette\fP\fB, int \fP\fImaximum_colors\fP\fB, png_uint_16p \fP\fIhistogram\fP\fB, int \fIfull_dither\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_error_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIerror_ptr\fP\fB, png_error_ptr \fP\fIerror_fn\fP\fB, png_error_ptr \fIwarning_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_expand (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_expand_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_filler (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, int \fIflags\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_filter (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fImethod\fP\fB, int \fIfilters\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_filter_heuristics (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIheuristic_method\fP\fB, int \fP\fInum_weights\fP\fB, png_doublep \fP\fIfilter_weights\fP\fB, png_doublep \fIfilter_costs\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_flush (png_structp \fP\fIpng_ptr\fP\fB, int \fInrows\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_gamma (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIscreen_gamma\fP\fB, double \fIdefault_file_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIfile_gamma\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_gray_1_2_4_to_8(png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_set_interlace_handling (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_invalid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fImask\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_invert_alpha (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_invert_mono (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_keep_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIkeep\fP\fB, png_bytep \fP\fIchunk_list\fP\fB, int \fInum_chunks\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_mem_fn(png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fImem_ptr\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIoffset_x\fP\fB, png_uint_32 \fP\fIoffset_y\fP\fB, int \fIunit_type\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_packing (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_packswap (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_palette_to_rgb(png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIres_x\fP\fB, png_uint_32 \fP\fIres_y\fP\fB, int \fIunit_type\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_progressive_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIprogressive_ptr\fP\fB, png_progressive_info_ptr \fP\fIinfo_fn\fP\fB, png_progressive_row_ptr \fP\fIrow_fn\fP\fB, png_progressive_end_ptr \fIend_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_read_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fIread_data_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_read_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_read_status_ptr \fIread_row_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_read_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIread_user_transform_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_rgb_to_gray (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIerror_action\fP\fB, double \fP\fIred\fP\fB, double \fIgreen\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_rgb_to_gray_fixed (png_structp \fP\fIpng_ptr\fP\fB, int error_action png_fixed_point \fP\fIred\fP\fB, png_fixed_point \fIgreen\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_rows (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytepp \fIrow_pointers\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_color_8p \fIsig_bit\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_shift (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fItrue_bits\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sig_bytes (png_structp \fP\fIpng_ptr\fP\fB, int \fInum_bytes\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_spalette_p \fP\fIsplt_ptr\fP\fB, int \fInum_spalettes\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_sRGB_gAMA_and_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fIintent\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_strip_16 (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_strip_alpha (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_swap (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_swap_alpha (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_text (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fP\fInum_trans\fP\fB, png_color_16p \fItrans_values\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_tRNS_to_alpha(png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBpng_uint_32 png_set_unknown_chunks (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_unknown_chunkp \fP\fIunknowns\fP\fB, int \fP\fInum\fP\fB, int \fIlocation\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_unknown_chunk_location(png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fIchunk\fP\fB, int \fIlocation\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_read_user_chunk_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_chunk_ptr\fP\fB, png_user_chunk_ptr \fIread_user_chunk_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_user_limits (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIuser_width_max\fP\fB, png_uint_32 \fIuser_height_max\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_user_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIuser_transform_ptr\fP\fB, int \fP\fIuser_transform_depth\fP\fB, int \fIuser_transform_channels\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_write_fn (png_structp \fP\fIpng_ptr\fP\fB, png_voidp \fP\fIio_ptr\fP\fB, png_rw_ptr \fP\fIwrite_data_fn\fP\fB, png_flush_ptr \fIoutput_flush_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_write_status_fn (png_structp \fP\fIpng_ptr\fP\fB, png_write_status_ptr \fIwrite_row_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_write_user_transform_fn (png_structp \fP\fIpng_ptr\fP\fB, png_user_transform_ptr \fIwrite_user_transform_fn\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_set_compression_buffer_size(png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBint png_sig_cmp (png_bytep \fP\fIsig\fP\fB, png_size_t \fP\fIstart\fP\fB, png_size_t \fInum_to_check\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_start_read_image (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_warning (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fImessage\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_chunk_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_chunk_end (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_chunk_start (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIchunk_name\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_destroy (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_flush (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_image (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fIimage\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_write_init (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBDEPRECATED: void png_write_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_info_before_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_png (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fP\fItransforms\fP\fB, png_voidp \fIparams\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_rows (png_structp \fP\fIpng_ptr\fP\fB, png_bytepp \fP\fIrow\fP\fB, png_uint_32 \fInum_rows\fP\fB);\fP
 
+\fI\fB
+
 \fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP
 
+\fI\fB
+
 .SH DESCRIPTION
 The
 .I libpng
@@ -410,7 +821,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.37 - May 9, 2008
+ libpng version 1.0.38rc01 - July 17, 2008
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
@@ -419,7 +830,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.0.37 - May 9, 2008
+ libpng versions 0.97, January 1998, through 1.0.38rc01 - July 17, 2008
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2008 Glenn Randers-Pehrson
 
@@ -3225,13 +3636,13 @@
 
 .SH VIII. Y2K Compliance in libpng
 
-May 9, 2008
+July 17, 2008
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.37 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.38rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -3464,6 +3875,9 @@
  1.0.35              10    10035  10.so.0.35[.0]
  1.2.29              13    10229  12.so.0.29[.0]
  1.0.37              10    10037  10.so.0.37[.0]
+ 1.2.30beta01-04     13    10230  12.so.0.30[.0]
+ 1.0.38rc01          10    10038  10.so.0.38[.0]
+ 1.2.30rc01          13    10230  12.so.0.30[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -3519,7 +3933,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.37 - May 9, 2008:
+Libpng version 1.0.38rc01 - July 17, 2008:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3540,7 +3954,7 @@
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.0.37, May 9, 2008, are
+libpng versions 1.2.6, August 15, 2004, through 1.0.38rc01, July 17, 2008, are
 Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -3639,7 +4053,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-May 9, 2008
+July 17, 2008
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index e55e9ce..31927ba 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,266 +1,782 @@
-.TH LIBPNGPF 3 "May 9, 2008"
+.TH LIBPNGPF 3 "July 17, 2008"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.37
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.38rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_build_gamma_table (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_build_grayscale_palette (int \fP\fIbit_depth\fP\fB, png_colorp \fIpalette\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_calculate_crc (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIptr\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_check_chunk_name (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBpng_size_t png_check_keyword (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charpp \fInew_key\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fImask\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_correct_palette (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBint png_crc_error (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBint png_crc_finish (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIskip\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_crc_read (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuf\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBpng_voidp png_create_struct (int \fItype\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBpng_voidp png_create_struct_2 (int \fP\fItype\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBpng_charp png_decompress_chunk (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcomp_type\fP\fB, png_charp \fP\fIchunkdata\fP\fB, png_size_t \fP\fIchunklength\fP\fB, png_size_t \fP\fIprefix_length\fP\fB, png_size_t \fI*data_length\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_destroy_struct (png_voidp \fIstruct_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fP\fIfree_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_background (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fP\fItrans_values\fP\fB, png_color_16p \fP\fIbackground\fP\fB, png_color_16p \fP\fIbackground_1\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_bytep \fP\fIgamma_from_1\fP\fB, png_bytep \fP\fIgamma_to_1\fP\fB, png_uint_16pp \fP\fIgamma_16\fP\fB, png_uint_16pp \fP\fIgamma_16_from_1\fP\fB, png_uint_16pp \fP\fIgamma_16_to_1\fP\fB, int \fIgamma_shift\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_bgr (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_chop (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_dither (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIpalette_lookup\fP\fB, png_bytep \fIdither_lookup\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_expand (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fItrans_value\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_expand_palette (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fInum_trans\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_gamma (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_uint_16pp \fP\fIgamma_16_table\fP\fB, int \fIgamma_shift\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_gray_to_rgb (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_invert (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_pack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIbit_depth\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_packswap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_read_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, png_uint_32 \fIflags\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_read_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fP\fIpass\fP\fB, png_uint_32 \fItransformations\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_read_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_read_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBint png_do_rgb_to_gray (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_shift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIbit_depth\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_strip_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIflags\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_swap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_unpack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_unshift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIsig_bits\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_write_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fIpass\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_write_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_write_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_do_write_transformations (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid *png_far_to_near (png_structp png_ptr,png_voidp \fP\fIptr\fP\fB, int \fIcheck\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_flush (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_IEND (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_iTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_info_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_init_mmx_flags (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_init_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_process_IDAT_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_process_some_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_check_crc (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_crc_finish (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_crc_skip (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_fill_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_have_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_have_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_have_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_process_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_IDAT (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_sig (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_read_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_restore_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_push_save_buffer (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
+\fBpng_uint_32 png_read_chunk_header (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_filter_row (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIprev_row\fP\fB, int \fIfilter\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_push_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_start_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_read_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_reset_crc (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBint png_set_text_2 (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_cHRM (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_filtered_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIfiltered_row\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_find_filter (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fIrow_info\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_gAMA (png_structp \fP\fIpng_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIint_file_gamma\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_uint_16p \fP\fIhist\fP\fB, int \fInum_hist\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, int \fIproflen\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_IDAT (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_IEND (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fP\fIfilter_type\fP\fB, int \fIinterlace_type\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_iTXt (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcompression\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fIlang\fP\fB, png_charp \fP\fItranslated_key\fP\fB, png_charp \fItext\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_offset\fP\fB, png_uint_32 \fP\fIy_offset\fP\fB, int \fIunit_type\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_pixels_per_unit\fP\fB, png_uint_32 \fP\fIy_pixels_per_unit\fP\fB, int \fIunit_type\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_uint_32 \fInum_pal\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fP\fIsbit\fP\fB, int \fIcolor_type\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sCAL_s (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, png_charp \fP\fIwidth\fP\fB, png_charp \fIheight\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sig (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sRGB (png_structp \fP\fIpng_ptr\fP\fB, int \fIintent\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_spalette_p \fIpalette\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_start_row (png_structp \fIpng_ptr\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fItext_len\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fP\fInumber\fP\fB, int \fIcolor_type\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_write_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fP\fItext_len\fP\fB, int \fIcompression\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP
 
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP
 
 \fI\fB
 
+\fI\fB
+
 .SH DESCRIPTION
 The functions listed above are used privately by libpng
 and are not recommended for use by applications.  They are
diff --git a/png.5 b/png.5
index 9ff4441..b5e7ed9 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "May 9, 2008"
+.TH PNG 5 "July 17, 2008"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 3bbe867..fa419ad 100644
--- a/png.c
+++ b/png.c
@@ -1,9 +1,9 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.21 October 4, 2007
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
@@ -13,7 +13,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_37 Your_png_h_is_not_version_1_0_37;
+typedef version_1_0_38rc01 Your_png_h_is_not_version_1_0_38rc01;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -92,7 +92,7 @@
 void PNGAPI
 png_set_sig_bytes(png_structp png_ptr, int num_bytes)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_debug(1, "in png_set_sig_bytes\n");
    if (num_bytes > 8)
       png_error(png_ptr, "Too many bytes for PNG signature.");
@@ -153,7 +153,7 @@
    png_uint_32 save_flags=p->flags;
    png_uint_32 num_bytes;
 
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
    if (items > PNG_UINT_32_MAX/size)
    {
      png_warning (p, "Potential overflow in png_zalloc()");
@@ -241,7 +241,7 @@
    png_infop info_ptr;
 
    png_debug(1, "in png_create_info_struct\n");
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
 #ifdef PNG_USER_MEM_SUPPORTED
    info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
       png_ptr->malloc_fn, png_ptr->mem_ptr);
@@ -263,7 +263,7 @@
 png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
 {
    png_infop info_ptr = NULL;
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 
    png_debug(1, "in png_destroy_info_struct\n");
    if (info_ptr_ptr != NULL)
@@ -302,11 +302,11 @@
 {
    png_infop info_ptr = *ptr_ptr;
 
-   if(info_ptr == NULL) return;
+   if (info_ptr == NULL) return;
 
    png_debug(1, "in png_info_init_3\n");
 
-   if(png_sizeof(png_info) > png_info_struct_size)
+   if (png_sizeof(png_info) > png_info_struct_size)
      {
        png_destroy_struct(info_ptr);
        info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
@@ -314,7 +314,7 @@
      }
 
    /* set everything to 0 */
-   png_memset(info_ptr, 0, png_sizeof (png_info));
+   png_memset(info_ptr, 0, png_sizeof(png_info));
 }
 
 #ifdef PNG_FREE_ME_SUPPORTED
@@ -325,9 +325,9 @@
    png_debug(1, "in png_data_freer\n");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
-   if(freer == PNG_DESTROY_WILL_FREE_DATA)
+   if (freer == PNG_DESTROY_WILL_FREE_DATA)
       info_ptr->free_me |= mask;
-   else if(freer == PNG_USER_WILL_FREE_DATA)
+   else if (freer == PNG_USER_WILL_FREE_DATA)
       info_ptr->free_me &= ~mask;
    else
       png_warning(png_ptr,
@@ -459,7 +459,7 @@
 {
    if (num != -1)
    {
-      if(info_ptr->splt_palettes)
+      if (info_ptr->splt_palettes)
       {
           png_free(png_ptr, info_ptr->splt_palettes[num].name);
           png_free(png_ptr, info_ptr->splt_palettes[num].entries);
@@ -469,7 +469,7 @@
    }
    else
    {
-       if(info_ptr->splt_palettes_num)
+       if (info_ptr->splt_palettes_num)
        {
          int i;
          for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
@@ -485,7 +485,7 @@
 #endif
 
 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-  if(png_ptr->unknown_chunk.data)
+  if (png_ptr->unknown_chunk.data)
   {
     png_free(png_ptr, png_ptr->unknown_chunk.data);
     png_ptr->unknown_chunk.data = NULL;
@@ -498,7 +498,7 @@
 {
    if (num != -1)
    {
-       if(info_ptr->unknown_chunks)
+       if (info_ptr->unknown_chunks)
        {
           png_free(png_ptr, info_ptr->unknown_chunks[num].data);
           info_ptr->unknown_chunks[num].data = NULL;
@@ -508,7 +508,7 @@
    {
        int i;
 
-       if(info_ptr->unknown_chunks_num)
+       if (info_ptr->unknown_chunks_num)
        {
          for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
             png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
@@ -562,7 +562,7 @@
 if (mask & PNG_FREE_ROWS)
 #endif
 {
-    if(info_ptr->row_pointers)
+    if (info_ptr->row_pointers)
     {
        int row;
        for (row = 0; row < (int)info_ptr->height; row++)
@@ -578,7 +578,7 @@
 #endif
 
 #ifdef PNG_FREE_ME_SUPPORTED
-   if(num == -1)
+   if (num == -1)
      info_ptr->free_me &= ~mask;
    else
      info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
@@ -616,7 +616,7 @@
 png_voidp PNGAPI
 png_get_io_ptr(png_structp png_ptr)
 {
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
    return (png_ptr->io_ptr);
 }
 
@@ -632,7 +632,7 @@
 png_init_io(png_structp png_ptr, png_FILE_p fp)
 {
    png_debug(1, "in png_init_io\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = (png_voidp)fp;
 }
 #endif
@@ -648,7 +648,7 @@
         {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
          "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
    if (png_ptr->time_buffer == NULL)
    {
       png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
@@ -669,7 +669,7 @@
 #ifdef USE_FAR_KEYWORD
    {
       char near_time_buf[29];
-      png_snprintf6(near_time_buf,29,"%d %s %d %02d:%02d:%02d +0000",
+      png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
           ptime->day % 32, short_months[(ptime->month - 1) % 12],
           ptime->year, ptime->hour % 24, ptime->minute % 60,
           ptime->second % 61);
@@ -677,7 +677,7 @@
           29*png_sizeof(char));
    }
 #else
-   png_snprintf6(png_ptr->time_buffer,29,"%d %s %d %02d:%02d:%02d +0000",
+   png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
        ptime->day % 32, short_months[(ptime->month - 1) % 12],
        ptime->year, ptime->hour % 24, ptime->minute % 60,
        ptime->second % 61);
@@ -693,7 +693,7 @@
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.0.37 - May 9, 2008\n\
+   return ((png_charp) "\n libpng version 1.0.38rc01 - July 17, 2008\n\
    Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
@@ -743,12 +743,12 @@
    /* check chunk_name and return "keep" value if it's on the list, else 0 */
    int i;
    png_bytep p;
-   if(png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
+   if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
       return 0;
-   p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
-   for (i = png_ptr->num_chunk_list; i; i--, p-=5)
+   p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
+   for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
       if (!png_memcmp(chunk_name, p, 4))
-        return ((int)*(p+4));
+        return ((int)*(p + 4));
    return 0;
 }
 #endif
diff --git a/png.h b/png.h
index 59e2ac7..f3f7ffa 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.37 - May 9, 2008
+ * libpng version 1.0.38rc01 - July 17, 2008
  * Copyright (c) 1998-2008 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.)
@@ -8,7 +8,7 @@
  * 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 1.0.37 - May 9, 2008: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.38rc01 - July 17, 2008: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -193,6 +193,9 @@
  *    1.0.35                  10    10035  10.so.0.35[.0]
  *    1.2.29                  13    10229  12.so.0.29[.0]
  *    1.0.37                  10    10037  10.so.0.37[.0]
+ *    1.2.30beta01-04         13    10230  12.so.0.30[.0]
+ *    1.0.38rc01              10    10038  10.so.0.38[.0]
+ *    1.2.30rc01              13    10230  12.so.0.30[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -222,7 +225,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.0.37, May 9, 2008, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.0.38rc01, July 17, 2008, are
  * Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -334,13 +337,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    May 9, 2008
+ *    July 17, 2008
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.0.37 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.38rc01 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -396,9 +399,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.37"
+#define PNG_LIBPNG_VER_STRING "1.0.38rc01"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.37 - May 9, 2008\n"
+   " libpng version 1.0.38rc01 - July 17, 2008\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  10
@@ -406,11 +409,11 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   0
-#define PNG_LIBPNG_VER_RELEASE 37
+#define PNG_LIBPNG_VER_RELEASE 38
 /* 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  01
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -427,14 +430,14 @@
 #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
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
 
 /* 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 10037 /* 1.0.37 */
+#define PNG_LIBPNG_VER 10038 /* 1.0.38 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* include the compression library's header */
@@ -1205,7 +1208,7 @@
    png_uint_32 row_number;    /* current row in interlace pass */
    png_bytep prev_row;        /* buffer to save previous (unfiltered) row */
    png_bytep row_buf;         /* buffer to save current (unfiltered) row */
-#ifndef PNG_NO_WRITE_FILTERING
+#ifndef PNG_NO_WRITE_FILTER
    png_bytep sub_row;         /* buffer to save "sub" row when filtering */
    png_bytep up_row;          /* buffer to save "up" row when filtering */
    png_bytep avg_row;         /* buffer to save "avg" row when filtering */
@@ -1445,13 +1448,14 @@
 
 /* New members added in libpng-1.2.26 */
   png_uint_32 old_big_row_buf_size, old_prev_row_size;
+
 };
 
 
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_0_37;
+typedef png_structp version_1_0_38rc01;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -2646,6 +2650,7 @@
    png_ptr));
 #endif
 
+
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
@@ -3557,6 +3562,9 @@
 #endif /* PNG_pHYs_SUPPORTED */
 #endif  /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
 
+/* Read the chunk header (length + type name) */
+PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
+
 /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 #endif /* PNG_INTERNAL */
diff --git a/pngconf.h b/pngconf.h
index 1882bda..0cb9b57 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.0.37 - May 9, 2008
+ * libpng version 1.0.38rc01 - July 17, 2008
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1117,10 +1117,10 @@
    change (I'm not sure if you will or not, so I thought I'd be safe) */
 #ifdef PNG_SIZE_T
    typedef PNG_SIZE_T png_size_t;
-#  define png_sizeof(x) png_convert_size(sizeof (x))
+#  define png_sizeof(x) png_convert_size(sizeof(x))
 #else
    typedef size_t png_size_t;
-#  define png_sizeof(x) sizeof (x)
+#  define png_sizeof(x) sizeof(x)
 #endif
 
 /* The following is needed for medium model support.  It cannot be in the
diff --git a/pngerror.c b/pngerror.c
index b364fc0..646e71a 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,9 +1,9 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.2.22 [October 13, 2007]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -15,8 +15,8 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
 static void /* PRIVATE */
 png_default_error PNGARG((png_structp png_ptr,
   png_const_charp error_message));
@@ -45,19 +45,19 @@
        if (*error_message == '#')
        {
            int offset;
-           for (offset=1; offset<15; offset++)
-              if (*(error_message+offset) == ' ')
+           for (offset = 1; offset<15; offset++)
+              if (*(error_message + offset) == ' ')
                   break;
            if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
            {
               int i;
-              for (i=0; i<offset-1; i++)
+              for (i=0; i<offset - 1; i++)
                  msg[i]=error_message[i+1];
               msg[i]='\0';
-              error_message=msg;
+              error_message = msg;
            }
            else
-              error_message+=offset;
+              error_message += offset;
        }
        else
        {
@@ -110,16 +110,16 @@
      {
        if (*warning_message == '#')
        {
-           for (offset=1; offset<15; offset++)
-              if (*(warning_message+offset) == ' ')
+           for (offset = 1; offset<15; offset++)
+              if (*(warning_message + offset) == ' ')
                   break;
        }
      }
      if (png_ptr != NULL && png_ptr->warning_fn != NULL)
-        (*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
+        (*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
    }
    else
-      png_default_warning(png_ptr, warning_message+offset);
+      png_default_warning(png_ptr, warning_message + offset);
 }
 #endif /* PNG_NO_WARNINGS */
 
@@ -167,8 +167,8 @@
    {
       buffer[iout++] = ':';
       buffer[iout++] = ' ';
-      png_memcpy(buffer+iout, error_message, PNG_MAX_ERROR_TEXT);
-      buffer[iout+PNG_MAX_ERROR_TEXT-1] = '\0';
+      png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
+      buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
    }
 }
 
@@ -220,18 +220,18 @@
      char error_number[16];
      for (offset=0; offset<15; offset++)
      {
-         error_number[offset] = *(error_message+offset+1);
-         if (*(error_message+offset) == ' ')
+         error_number[offset] = *(error_message + offset + 1);
+         if (*(error_message + offset) == ' ')
              break;
      }
-     if((offset > 1) && (offset < 15))
+     if ((offset > 1) && (offset < 15))
      {
-       error_number[offset-1]='\0';
+       error_number[offset - 1]='\0';
        fprintf(stderr, "libpng error no. %s: %s\n", error_number,
-          error_message+offset);
+          error_message + offset);
      }
      else
-       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
+       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message, offset);
    }
    else
 #endif
@@ -276,15 +276,15 @@
      char warning_number[16];
      for (offset=0; offset<15; offset++)
      {
-        warning_number[offset]=*(warning_message+offset+1);
-        if (*(warning_message+offset) == ' ')
+        warning_number[offset]=*(warning_message + offset + 1);
+        if (*(warning_message + offset) == ' ')
             break;
      }
-     if((offset > 1) && (offset < 15))
+     if ((offset > 1) && (offset < 15))
      {
-       warning_number[offset-1]='\0';
+       warning_number[offset + 1]='\0';
        fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
-          warning_message+offset);
+          warning_message + offset);
      }
      else
        fprintf(stderr, "libpng warning: %s\n", warning_message);
@@ -333,7 +333,7 @@
 void PNGAPI
 png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
 {
-   if(png_ptr != NULL)
+   if (png_ptr != NULL)
    {
      png_ptr->flags &=
        ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
diff --git a/pngget.c b/pngget.c
index a0e90bb..5cbd963 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,16 +1,15 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.2.15 January 5, 2007
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 png_uint_32 PNGAPI
@@ -122,7 +121,7 @@
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
           return (0);
       else return (info_ptr->x_pixels_per_unit);
    }
@@ -140,7 +139,7 @@
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
           return (0);
       else return (info_ptr->y_pixels_per_unit);
    }
@@ -158,7 +157,7 @@
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
-      if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
+      if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
          info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
           return (0);
       else return (info_ptr->x_pixels_per_unit);
@@ -199,7 +198,7 @@
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+      if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
           return (0);
       else return (info_ptr->x_offset);
    }
@@ -217,7 +216,7 @@
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
+      if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
           return (0);
       else return (info_ptr->y_offset);
    }
@@ -235,7 +234,7 @@
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+      if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
           return (0);
       else return (info_ptr->x_offset);
    }
@@ -253,7 +252,7 @@
    if (info_ptr->valid & PNG_INFO_oFFs)
    {
       png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
-      if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
+      if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
           return (0);
       else return (info_ptr->y_offset);
    }
@@ -323,7 +322,7 @@
       {
          *unit_type = (int)info_ptr->phys_unit_type;
          retval |= PNG_INFO_pHYs;
-         if(*unit_type == 1)
+         if (*unit_type == 1)
          {
             if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
             if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
@@ -784,10 +783,10 @@
              *trans_values = &(info_ptr->trans_values);
              retval |= PNG_INFO_tRNS;
           }
-          if(trans != NULL)
+          if (trans != NULL)
              *trans = NULL;
       }
-      if(num_trans != NULL)
+      if (num_trans != NULL)
       {
          *num_trans = info_ptr->num_trans;
          retval |= PNG_INFO_tRNS;
diff --git a/pngmem.c b/pngmem.c
index 13cc60c..21d7964 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -16,7 +16,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 /* Borland DOS special memory handler */
@@ -48,7 +47,7 @@
      return (png_get_copyright(NULL));
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -80,7 +79,7 @@
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -122,7 +121,7 @@
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(png_ptr->malloc_fn != NULL)
+   if (png_ptr->malloc_fn != NULL)
        ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
        ret = (png_malloc_default(png_ptr, size));
@@ -171,7 +170,7 @@
                ret = NULL;
             }
 
-            if(png_ptr->zlib_window_bits > 14)
+            if (png_ptr->zlib_window_bits > 14)
                num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
             else
                num_blocks = 1;
@@ -210,7 +209,7 @@
 
             png_ptr->offset_table = table;
             png_ptr->offset_table_ptr = farmalloc(num_blocks *
-               png_sizeof (png_bytep));
+               png_sizeof(png_bytep));
 
             if (png_ptr->offset_table_ptr == NULL)
             {
@@ -293,7 +292,7 @@
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
 
-   if(png_ptr == NULL || ptr == NULL) return;
+   if (png_ptr == NULL || ptr == NULL) return;
 
    if (png_ptr->offset_table != NULL)
    {
@@ -353,7 +352,7 @@
       return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-   if(malloc_fn != NULL)
+   if (malloc_fn != NULL)
    {
       png_struct dummy_struct;
       png_structp png_ptr = &dummy_struct;
@@ -369,7 +368,7 @@
    struct_ptr = (png_voidp)farmalloc(size);
 #else
 # if defined(_MSC_VER) && defined(MAXSEG_64K)
-   struct_ptr = (png_voidp)halloc(size,1);
+   struct_ptr = (png_voidp)halloc(size, 1);
 # else
    struct_ptr = (png_voidp)malloc(size);
 # endif
@@ -398,7 +397,7 @@
    if (struct_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      if(free_fn != NULL)
+      if (free_fn != NULL)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
@@ -434,7 +433,7 @@
    if (png_ptr == NULL || size == 0)
       return (NULL);
 
-   if(png_ptr->malloc_fn != NULL)
+   if (png_ptr->malloc_fn != NULL)
        ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
    else
        ret = (png_malloc_default(png_ptr, size));
@@ -542,7 +541,7 @@
 {
    png_voidp ptr;
    png_uint_32 save_flags;
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
 
    save_flags=png_ptr->flags;
    png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
@@ -560,7 +559,7 @@
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memcpy_check.");
+      png_error(png_ptr, "Overflow in png_memcpy_check.");
 
    return(png_memcpy (s1, s2, size));
 }
@@ -573,7 +572,7 @@
 
    size = (png_size_t)length;
    if ((png_uint_32)size != length)
-      png_error(png_ptr,"Overflow in png_memset_check.");
+      png_error(png_ptr, "Overflow in png_memset_check.");
 
    return (png_memset (s1, value, size));
 
@@ -587,7 +586,7 @@
 png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
   malloc_fn, png_free_ptr free_fn)
 {
-   if(png_ptr != NULL) {
+   if (png_ptr != NULL) {
    png_ptr->mem_ptr = mem_ptr;
    png_ptr->malloc_fn = malloc_fn;
    png_ptr->free_fn = free_fn;
@@ -601,7 +600,7 @@
 png_voidp PNGAPI
 png_get_mem_ptr(png_structp png_ptr)
 {
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
    return ((png_voidp)png_ptr->mem_ptr);
 }
 #endif /* PNG_USER_MEM_SUPPORTED */
diff --git a/pngpread.c b/pngpread.c
index aa7151c..f6e5656 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -10,7 +10,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
 
 /* push model modes */
@@ -28,7 +27,7 @@
 png_process_data(png_structp png_ptr, png_infop info_ptr,
    png_bytep buffer, png_size_t buffer_size)
 {
-   if(png_ptr == NULL || info_ptr == NULL) return;
+   if (png_ptr == NULL || info_ptr == NULL) return;
    png_push_restore_buffer(png_ptr, buffer, buffer_size);
 
    while (png_ptr->buffer_size)
@@ -43,7 +42,7 @@
 void /* PRIVATE */
 png_process_some_data(png_structp png_ptr, png_infop info_ptr)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    switch (png_ptr->process_mode)
    {
       case PNG_READ_SIG_MODE:
@@ -114,7 +113,7 @@
 
    png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
       num_to_check);
-   png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes+num_to_check);
+   png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
 
    if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
    {
@@ -210,14 +209,14 @@
       }
 
       png_push_fill_buffer(png_ptr, chunk_length, 4);
-      png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+      png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
       png_reset_crc(png_ptr);
       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
    }
 
    if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-     if(png_ptr->mode & PNG_AFTER_IDAT)
+     if (png_ptr->mode & PNG_AFTER_IDAT)
         png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
 
    if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
@@ -565,7 +564,7 @@
 {
    png_bytep ptr;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    ptr = buffer;
    if (png_ptr->save_buffer_size)
    {
@@ -606,7 +605,7 @@
    {
       if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
       {
-         png_size_t i,istop;
+         png_size_t i, istop;
          png_bytep sp;
          png_bytep dp;
 
@@ -675,7 +674,7 @@
       }
 
       png_push_fill_buffer(png_ptr, chunk_length, 4);
-      png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+      png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
       png_reset_crc(png_ptr);
       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
@@ -698,7 +697,7 @@
       {
          save_size = (png_size_t)png_ptr->idat_size;
          /* check for overflow */
-         if((png_uint_32)save_size != png_ptr->idat_size)
+         if ((png_uint_32)save_size != png_ptr->idat_size)
             png_error(png_ptr, "save_size overflowed in pngpread");
       }
       else
@@ -720,7 +719,7 @@
       {
          save_size = (png_size_t)png_ptr->idat_size;
          /* check for overflow */
-         if((png_uint_32)save_size != png_ptr->idat_size)
+         if ((png_uint_32)save_size != png_ptr->idat_size)
             png_error(png_ptr, "save_size overflowed in pngpread");
       }
       else
@@ -760,7 +759,7 @@
 
    png_ptr->zstream.next_in = buffer;
    png_ptr->zstream.avail_in = (uInt)buffer_length;
-   for(;;)
+   for (;;)
    {
       ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
       if (ret != Z_OK)
@@ -1020,37 +1019,32 @@
          png_ptr->rowbytes + 1);
       do
       {
-         int pass;
-         pass = png_ptr->pass;
-         pass++;
-         if ((pass == 1 && png_ptr->width < 5) ||
-             (pass == 3 && png_ptr->width < 3) ||
-             (pass == 5 && png_ptr->width < 2))
-           pass++;
+         png_ptr->pass++;
+         if ((png_ptr->pass == 1 && png_ptr->width < 5) ||
+             (png_ptr->pass == 3 && png_ptr->width < 3) ||
+             (png_ptr->pass == 5 && png_ptr->width < 2))
+           png_ptr->pass++;
 
-         if (pass > 7)
-            pass--;
-         png_ptr->pass = (png_byte) pass;
-         if (pass < 7)
-           {
-             png_ptr->iwidth = (png_ptr->width +
-                png_pass_inc[pass] - 1 -
-                png_pass_start[pass]) /
-                png_pass_inc[pass];
+         if (png_ptr->pass > 7)
+            png_ptr->pass--;
+         if (png_ptr->pass >= 7)
+            break;
 
-             png_ptr->irowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,
-                png_ptr->iwidth) + 1;
+         png_ptr->iwidth = (png_ptr->width +
+            png_pass_inc[png_ptr->pass] - 1 -
+            png_pass_start[png_ptr->pass]) /
+            png_pass_inc[png_ptr->pass];
 
-             if (png_ptr->transformations & PNG_INTERLACE)
-                break;
+         png_ptr->irowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,
+            png_ptr->iwidth) + 1;
 
-             png_ptr->num_rows = (png_ptr->height +
-                png_pass_yinc[pass] - 1 -
-                png_pass_ystart[pass]) /
-                png_pass_yinc[pass];
-           }
-         else
-           break;
+         if (png_ptr->transformations & PNG_INTERLACE)
+            break;
+
+         png_ptr->num_rows = (png_ptr->height +
+            png_pass_yinc[png_ptr->pass] - 1 -
+            png_pass_ystart[png_ptr->pass]) /
+            png_pass_yinc[png_ptr->pass];
 
       } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
    }
@@ -1079,7 +1073,7 @@
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-         (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1177,7 +1171,7 @@
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-       (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1268,8 +1262,8 @@
             if (text == NULL)
             {
                text = (png_charp)png_malloc(png_ptr,
-                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
-                     + key_size + 1));
+                     (png_uint_32)(png_ptr->zbuf_size
+                     - png_ptr->zstream.avail_out + key_size + 1));
                png_memcpy(text + key_size, png_ptr->zbuf,
                   png_ptr->zbuf_size - png_ptr->zstream.avail_out);
                png_memcpy(text, key, key_size);
@@ -1283,8 +1277,8 @@
 
                tmp = text;
                text = (png_charp)png_malloc(png_ptr, text_size +
-                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
-                   + 1));
+                  (png_uint_32)(png_ptr->zbuf_size 
+                  - png_ptr->zstream.avail_out));
                png_memcpy(text, tmp, text_size);
                png_free(png_ptr, tmp);
                png_memcpy(text + text_size, png_ptr->zbuf,
@@ -1367,7 +1361,7 @@
 #endif
 
    png_ptr->current_text = (png_charp)png_malloc(png_ptr,
-         (png_uint_32)(length+1));
+      (png_uint_32)(length + 1));
    png_ptr->current_text[length] = '\0';
    png_ptr->current_text_ptr = png_ptr->current_text;
    png_ptr->current_text_size = (png_size_t)length;
@@ -1474,16 +1468,16 @@
    if (!(png_ptr->chunk_name[0] & 0x20))
    {
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
-     if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
-          PNG_HANDLE_CHUNK_ALWAYS
+      if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+         PNG_HANDLE_CHUNK_ALWAYS
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-          && png_ptr->read_user_chunk_fn == NULL
+         && png_ptr->read_user_chunk_fn == NULL
 #endif
-        )
+         )
 #endif
-        png_chunk_error(png_ptr, "unknown critical chunk");
+         png_chunk_error(png_ptr, "unknown critical chunk");
 
-     info_ptr = info_ptr; /* to quiet some compiler warnings */
+      info_ptr = info_ptr; /* to quiet some compiler warnings */
    }
 
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
@@ -1507,11 +1501,12 @@
          png_ptr->unknown_chunk.data = NULL;
       else
       {
-         png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
+         png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
+       (png_uint_32)length);
          png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
       }
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-      if(png_ptr->read_user_chunk_fn != NULL)
+      if (png_ptr->read_user_chunk_fn != NULL)
       {
          /* callback to user unknown chunk handler */
          int ret;
@@ -1522,7 +1517,7 @@
          if (ret == 0)
          {
             if (!(png_ptr->chunk_name[0] & 0x20))
-               if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+               if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
                     PNG_HANDLE_CHUNK_ALWAYS)
                   png_chunk_error(png_ptr, "unknown critical chunk");
             png_set_unknown_chunks(png_ptr, info_ptr,
@@ -1571,7 +1566,7 @@
    PNG_CONST int FARDATA png_pass_dsp_mask[7] =
       {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
 #endif
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (new_row != NULL)    /* new_row must == png_ptr->row_buf here. */
       png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
 }
@@ -1581,7 +1576,7 @@
    png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
    png_progressive_end_ptr end_fn)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->info_fn = info_fn;
    png_ptr->row_fn = row_fn;
    png_ptr->end_fn = end_fn;
@@ -1592,7 +1587,7 @@
 png_voidp PNGAPI
 png_get_progressive_ptr(png_structp png_ptr)
 {
-   if(png_ptr == NULL) return (NULL);
+   if (png_ptr == NULL) return (NULL);
    return png_ptr->io_ptr;
 }
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
diff --git a/pngread.c b/pngread.c
index bd8bcd9..b796d17 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.25 [February 18, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED)
 
 /* Create a PNG structure for reading, and allocate any memory needed. */
@@ -79,7 +78,7 @@
       return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 
@@ -89,12 +88,12 @@
 
    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
 
-   if(user_png_ver)
+   if (user_png_ver)
    {
      i=0;
      do
      {
-       if(user_png_ver[i] != png_libpng_ver[i])
+       if (user_png_ver[i] != png_libpng_ver[i])
           png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
      } while (png_libpng_ver[i++]);
    }
@@ -164,7 +163,7 @@
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
       PNG_ABORT();
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #else
    if (setjmp(png_ptr->jmpbuf))
       PNG_ABORT();
@@ -190,9 +189,9 @@
    png_size_t png_struct_size, png_size_t png_info_size)
 {
    /* We only come here via pre-1.0.12-compiled applications */
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
-   if(png_sizeof(png_struct) > png_struct_size ||
+   if (png_sizeof(png_struct) > png_struct_size ||
       png_sizeof(png_info) > png_info_size)
    {
       char msg[80];
@@ -210,7 +209,7 @@
       png_warning(png_ptr, msg);
    }
 #endif
-   if(png_sizeof(png_struct) > png_struct_size)
+   if (png_sizeof(png_struct) > png_struct_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -219,7 +218,7 @@
        png_error(png_ptr,
        "The png struct allocated by the application for reading is too small.");
      }
-   if(png_sizeof(png_info) > png_info_size)
+   if (png_sizeof(png_info) > png_info_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -244,11 +243,11 @@
 
    png_structp png_ptr=*ptr_ptr;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 
    do
    {
-     if(user_png_ver[i] != png_libpng_ver[i])
+     if (user_png_ver[i] != png_libpng_ver[i])
      {
 #ifdef PNG_LEGACY_SUPPORTED
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
@@ -265,22 +264,22 @@
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
-   if(png_sizeof(png_struct) > png_struct_size)
-     {
-       png_destroy_struct(png_ptr);
-       *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
-       png_ptr = *ptr_ptr;
-     }
+   if (png_sizeof(png_struct) > png_struct_size)
+   {
+      png_destroy_struct(png_ptr);
+      *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+      png_ptr = *ptr_ptr;
+   }
 
    /* reset all variables to 0 */
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
    /* added at libpng-1.2.6 */
@@ -324,7 +323,7 @@
 void PNGAPI
 png_read_info(png_structp png_ptr, png_infop info_ptr)
 {
-   if(png_ptr == NULL || info_ptr == NULL) return;
+   if (png_ptr == NULL || info_ptr == NULL) return;
    png_debug(1, "in png_read_info\n");
    /* If we haven't checked all of the PNG signature bytes, do so now. */
    if (png_ptr->sig_bytes < 8)
@@ -347,7 +346,7 @@
          png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
    }
 
-   for(;;)
+   for (;;)
    {
 #ifdef PNG_USE_LOCAL_ARRAYS
       PNG_CONST PNG_IHDR;
@@ -406,38 +405,29 @@
       PNG_CONST PNG_zTXt;
 #endif
 #endif /* PNG_USE_LOCAL_ARRAYS */
-      png_byte chunk_length[4];
-      png_uint_32 length;
-
-      png_read_data(png_ptr, chunk_length, 4);
-      length = png_get_uint_31(png_ptr,chunk_length);
-
-      png_reset_crc(png_ptr);
-      png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-
-      png_debug2(0, "Reading %s chunk, length=%lu.\n", png_ptr->chunk_name,
-         length);
+      png_uint_32 length = png_read_chunk_header(png_ptr);
+      png_bytep chunk_name = png_ptr->chunk_name;
 
       /* This should be a binary subdivision search or a hash for
        * matching the chunk name rather than a linear search.
        */
-      if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-        if(png_ptr->mode & PNG_AFTER_IDAT)
+      if (!png_memcmp(chunk_name, png_IDAT, 4))
+        if (png_ptr->mode & PNG_AFTER_IDAT)
           png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
 
-      if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+      if (!png_memcmp(chunk_name, png_IHDR, 4))
          png_handle_IHDR(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+      else if (!png_memcmp(chunk_name, png_IEND, 4))
          png_handle_IEND(png_ptr, info_ptr, length);
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-      else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+      else if (png_handle_as_unknown(png_ptr, chunk_name))
       {
-         if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         if (!png_memcmp(chunk_name, png_IDAT, 4))
             png_ptr->mode |= PNG_HAVE_IDAT;
          png_handle_unknown(png_ptr, info_ptr, length);
-         if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+         if (!png_memcmp(chunk_name, png_PLTE, 4))
             png_ptr->mode |= PNG_HAVE_PLTE;
-         else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         else if (!png_memcmp(chunk_name, png_IDAT, 4))
          {
             if (!(png_ptr->mode & PNG_HAVE_IHDR))
                png_error(png_ptr, "Missing IHDR before IDAT");
@@ -448,9 +438,9 @@
          }
       }
 #endif
-      else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+      else if (!png_memcmp(chunk_name, png_PLTE, 4))
          png_handle_PLTE(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+      else if (!png_memcmp(chunk_name, png_IDAT, 4))
       {
          if (!(png_ptr->mode & PNG_HAVE_IHDR))
             png_error(png_ptr, "Missing IHDR before IDAT");
@@ -463,71 +453,71 @@
          break;
       }
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+      else if (!png_memcmp(chunk_name, png_bKGD, 4))
          png_handle_bKGD(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+      else if (!png_memcmp(chunk_name, png_cHRM, 4))
          png_handle_cHRM(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+      else if (!png_memcmp(chunk_name, png_gAMA, 4))
          png_handle_gAMA(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+      else if (!png_memcmp(chunk_name, png_hIST, 4))
          png_handle_hIST(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+      else if (!png_memcmp(chunk_name, png_oFFs, 4))
          png_handle_oFFs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+      else if (!png_memcmp(chunk_name, png_pCAL, 4))
          png_handle_pCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+      else if (!png_memcmp(chunk_name, png_sCAL, 4))
          png_handle_sCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+      else if (!png_memcmp(chunk_name, png_pHYs, 4))
          png_handle_pHYs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+      else if (!png_memcmp(chunk_name, png_sBIT, 4))
          png_handle_sBIT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+      else if (!png_memcmp(chunk_name, png_sRGB, 4))
          png_handle_sRGB(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+      else if (!png_memcmp(chunk_name, png_iCCP, 4))
          png_handle_iCCP(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+      else if (!png_memcmp(chunk_name, png_sPLT, 4))
          png_handle_sPLT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+      else if (!png_memcmp(chunk_name, png_tEXt, 4))
          png_handle_tEXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+      else if (!png_memcmp(chunk_name, png_tIME, 4))
          png_handle_tIME(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+      else if (!png_memcmp(chunk_name, png_tRNS, 4))
          png_handle_tRNS(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+      else if (!png_memcmp(chunk_name, png_zTXt, 4))
          png_handle_zTXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+      else if (!png_memcmp(chunk_name, png_iTXt, 4))
          png_handle_iTXt(png_ptr, info_ptr, length);
 #endif
       else
@@ -541,7 +531,7 @@
 png_read_update_info(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_update_info\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
    else
@@ -560,7 +550,7 @@
 png_start_read_image(png_structp png_ptr)
 {
    png_debug(1, "in png_start_read_image\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
 }
@@ -573,11 +563,11 @@
 #ifdef PNG_USE_LOCAL_ARRAYS
    PNG_CONST PNG_IDAT;
    PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
-     0xff};
+      0xff};
    PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
 #endif
    int ret;
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_debug2(1, "in png_read_row (row %lu, pass %d)\n",
       png_ptr->row_number, png_ptr->pass);
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
@@ -703,15 +693,9 @@
       {
          while (!png_ptr->idat_size)
          {
-            png_byte chunk_length[4];
-
             png_crc_finish(png_ptr, 0);
 
-            png_read_data(png_ptr, chunk_length, 4);
-            png_ptr->idat_size = png_get_uint_31(png_ptr,chunk_length);
-
-            png_reset_crc(png_ptr);
-            png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+            png_ptr->idat_size = png_read_chunk_header(png_ptr);
             if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
                png_error(png_ptr, "Not enough image data");
          }
@@ -747,7 +731,7 @@
    png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
        png_ptr->row_info.width);
 
-   if(png_ptr->row_buf[0])
+   if (png_ptr->row_buf[0])
    png_read_filter_row(png_ptr, &(png_ptr->row_info),
       png_ptr->row_buf + 1, png_ptr->prev_row + 1,
       (int)(png_ptr->row_buf[0]));
@@ -756,7 +740,7 @@
       png_ptr->rowbytes + 1);
 
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
    {
       /* Intrapixel differencing */
@@ -836,7 +820,7 @@
    png_bytepp dp;
 
    png_debug(1, "in png_read_rows\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    rp = row;
    dp = display_row;
    if (rp != NULL && dp != NULL)
@@ -847,14 +831,14 @@
 
          png_read_row(png_ptr, rptr, dptr);
       }
-   else if(rp != NULL)
+   else if (rp != NULL)
       for (i = 0; i < num_rows; i++)
       {
          png_bytep rptr = *rp;
          png_read_row(png_ptr, rptr, png_bytep_NULL);
          rp++;
       }
-   else if(dp != NULL)
+   else if (dp != NULL)
       for (i = 0; i < num_rows; i++)
       {
          png_bytep dptr = *dp;
@@ -880,12 +864,12 @@
 void PNGAPI
 png_read_image(png_structp png_ptr, png_bytepp image)
 {
-   png_uint_32 i,image_height;
+   png_uint_32 i, image_height;
    int pass, j;
    png_bytepp rp;
 
    png_debug(1, "in png_read_image\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
    pass = png_set_interlace_handling(png_ptr);
@@ -920,11 +904,11 @@
 void PNGAPI
 png_read_end(png_structp png_ptr, png_infop info_ptr)
 {
-   png_byte chunk_length[4];
+   png_bytep chunk_name;
    png_uint_32 length;
 
    png_debug(1, "in png_read_end\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
 
    do
@@ -986,33 +970,27 @@
       PNG_CONST PNG_zTXt;
 #endif
 #endif /* PNG_USE_LOCAL_ARRAYS */
+      length = png_read_chunk_header(png_ptr);
+      chunk_name = png_ptr->chunk_name;
 
-      png_read_data(png_ptr, chunk_length, 4);
-      length = png_get_uint_31(png_ptr,chunk_length);
-
-      png_reset_crc(png_ptr);
-      png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-
-      png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name);
-
-      if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+      if (!png_memcmp(chunk_name, png_IHDR, 4))
          png_handle_IHDR(png_ptr, info_ptr, length);
-      else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+      else if (!png_memcmp(chunk_name, png_IEND, 4))
          png_handle_IEND(png_ptr, info_ptr, length);
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-      else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
+      else if (png_handle_as_unknown(png_ptr, chunk_name))
       {
-         if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+         if (!png_memcmp(chunk_name, png_IDAT, 4))
          {
             if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
                png_error(png_ptr, "Too many IDAT's found");
          }
          png_handle_unknown(png_ptr, info_ptr, length);
-         if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+         if (!png_memcmp(chunk_name, png_PLTE, 4))
             png_ptr->mode |= PNG_HAVE_PLTE;
       }
 #endif
-      else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+      else if (!png_memcmp(chunk_name, png_IDAT, 4))
       {
          /* Zero length IDATs are legal after the last IDAT has been
           * read, but not after other chunks have been read.
@@ -1021,74 +999,74 @@
             png_error(png_ptr, "Too many IDAT's found");
          png_crc_finish(png_ptr, length);
       }
-      else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
+      else if (!png_memcmp(chunk_name, png_PLTE, 4))
          png_handle_PLTE(png_ptr, info_ptr, length);
 #if defined(PNG_READ_bKGD_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
+      else if (!png_memcmp(chunk_name, png_bKGD, 4))
          png_handle_bKGD(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_cHRM_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
+      else if (!png_memcmp(chunk_name, png_cHRM, 4))
          png_handle_cHRM(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_gAMA_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
+      else if (!png_memcmp(chunk_name, png_gAMA, 4))
          png_handle_gAMA(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_hIST_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
+      else if (!png_memcmp(chunk_name, png_hIST, 4))
          png_handle_hIST(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_oFFs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
+      else if (!png_memcmp(chunk_name, png_oFFs, 4))
          png_handle_oFFs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
+      else if (!png_memcmp(chunk_name, png_pCAL, 4))
          png_handle_pCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sCAL_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+      else if (!png_memcmp(chunk_name, png_sCAL, 4))
          png_handle_sCAL(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_pHYs_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
+      else if (!png_memcmp(chunk_name, png_pHYs, 4))
          png_handle_pHYs(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sBIT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
+      else if (!png_memcmp(chunk_name, png_sBIT, 4))
          png_handle_sBIT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sRGB_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
+      else if (!png_memcmp(chunk_name, png_sRGB, 4))
          png_handle_sRGB(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iCCP_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+      else if (!png_memcmp(chunk_name, png_iCCP, 4))
          png_handle_iCCP(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_sPLT_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+      else if (!png_memcmp(chunk_name, png_sPLT, 4))
          png_handle_sPLT(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+      else if (!png_memcmp(chunk_name, png_tEXt, 4))
          png_handle_tEXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tIME_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+      else if (!png_memcmp(chunk_name, png_tIME, 4))
          png_handle_tIME(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_tRNS_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
+      else if (!png_memcmp(chunk_name, png_tRNS, 4))
          png_handle_tRNS(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+      else if (!png_memcmp(chunk_name, png_zTXt, 4))
          png_handle_zTXt(png_ptr, info_ptr, length);
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
-      else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+      else if (!png_memcmp(chunk_name, png_iTXt, 4))
          png_handle_iTXt(png_ptr, info_ptr, length);
 #endif
       else
@@ -1111,9 +1089,7 @@
 
    png_debug(1, "in png_destroy_read_struct\n");
    if (png_ptr_ptr != NULL)
-   {
       png_ptr = *png_ptr_ptr;
-   }
    if (png_ptr == NULL)
       return;
 
@@ -1159,13 +1135,16 @@
       *end_info_ptr_ptr = NULL;
    }
 
+   if (png_ptr != NULL)
+   {
 #ifdef PNG_USER_MEM_SUPPORTED
-   png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
-       (png_voidp)mem_ptr);
+      png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
+          (png_voidp)mem_ptr);
 #else
-   png_destroy_struct((png_voidp)png_ptr);
+      png_destroy_struct((png_voidp)png_ptr);
 #endif
-   *png_ptr_ptr = NULL;
+      *png_ptr_ptr = NULL;
+   }
 }
 
 /* free all memory used by the read (old method) */
@@ -1288,7 +1267,7 @@
     * being used again.
     */
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    error_fn = png_ptr->error_fn;
@@ -1298,7 +1277,7 @@
    free_fn = png_ptr->free_fn;
 #endif
 
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
@@ -1308,7 +1287,7 @@
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
 }
@@ -1316,7 +1295,7 @@
 void PNGAPI
 png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->read_row_fn = read_row_fn;
 }
 
@@ -1330,7 +1309,7 @@
 {
    int row;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
    /* invert the alpha channel from opacity to transparency
     */
@@ -1343,7 +1322,7 @@
     */
    png_read_info(png_ptr, info_ptr);
    if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
-      png_error(png_ptr,"Image is too high to process with png_read_png()");
+      png_error(png_ptr, "Image is too high to process with png_read_png()");
 
    /* -------------- image transformations start here ------------------- */
 
@@ -1450,7 +1429,7 @@
 #ifdef PNG_FREE_ME_SUPPORTED
    png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
 #endif
-   if(info_ptr->row_pointers == NULL)
+   if (info_ptr->row_pointers == NULL)
    {
       info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
          info_ptr->height * png_sizeof(png_bytep));
diff --git a/pngrio.c b/pngrio.c
index 7d2522f..732ba00 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,9 +1,9 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.2.13 November 13, 2006
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2006 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -17,7 +17,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED)
 
 /* Read the data from whatever input you are using.  The default routine
@@ -28,7 +27,7 @@
 void /* PRIVATE */
 png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
-   png_debug1(4,"reading %d bytes\n", (int)length);
+   png_debug1(4, "reading %d bytes\n", (int)length);
    if (png_ptr->read_data_fn != NULL)
       (*(png_ptr->read_data_fn))(png_ptr, data, length);
    else
@@ -46,7 +45,7 @@
 {
    png_size_t check;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    /* fread() returns 0 on error, so it is OK to store this in a png_size_t
     * instead of an int, which is what fread() actually returns.
     */
@@ -77,7 +76,7 @@
    png_byte *n_data;
    png_FILE_p io_ptr;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    /* Check if data really is near. If so, use usual code. */
    n_data = (png_byte *)CVT_PTR_NOCHECK(data);
    io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
@@ -106,7 +105,7 @@
          err = fread(buf, (png_size_t)1, read, io_ptr);
 #endif
          png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-         if(err != read)
+         if (err != read)
             break;
          else
             check += err;
@@ -138,7 +137,7 @@
 png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr read_data_fn)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)
diff --git a/pngrtran.c b/pngrtran.c
index 873b22c..238ecb0 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -15,7 +15,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED)
 
 /* Set the action on getting a CRC error for an ancillary or critical chunk. */
@@ -24,7 +23,7 @@
 {
    png_debug(1, "in png_set_crc_action\n");
    /* Tell libpng how we react to CRC errors in critical chunks */
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    switch (crit_action)
    {
       case PNG_CRC_NO_CHANGE:                        /* leave setting as is */
@@ -39,7 +38,8 @@
                            PNG_FLAG_CRC_CRITICAL_IGNORE;
          break;
       case PNG_CRC_WARN_DISCARD:    /* not a valid action for critical data */
-         png_warning(png_ptr, "Can't discard critical data on CRC error.");
+         png_warning(png_ptr,
+            "Can't discard critical data on CRC error.");
       case PNG_CRC_ERROR_QUIT:                                /* error/quit */
       case PNG_CRC_DEFAULT:
       default:
@@ -81,7 +81,7 @@
    int need_expand, double background_gamma)
 {
    png_debug(1, "in png_set_background\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
    {
       png_warning(png_ptr, "Application must supply a known background gamma");
@@ -103,7 +103,7 @@
 png_set_strip_16(png_structp png_ptr)
 {
    png_debug(1, "in png_set_strip_16\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_16_TO_8;
 }
 #endif
@@ -113,7 +113,7 @@
 png_set_strip_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_strip_alpha\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
 }
 #endif
@@ -143,7 +143,7 @@
    int full_dither)
 {
    png_debug(1, "in png_set_dither\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_DITHER;
 
    if (!full_dither)
@@ -151,7 +151,7 @@
       int i;
 
       png_ptr->dither_index = (png_bytep)png_malloc(png_ptr,
-         (png_uint_32)(num_palette * png_sizeof (png_byte)));
+         (png_uint_32)(num_palette * png_sizeof(png_byte)));
       for (i = 0; i < num_palette; i++)
          png_ptr->dither_index[i] = (png_byte)i;
    }
@@ -167,7 +167,7 @@
 
          /* initialize an array to sort colors */
          png_ptr->dither_sort = (png_bytep)png_malloc(png_ptr,
-            (png_uint_32)(num_palette * png_sizeof (png_byte)));
+            (png_uint_32)(num_palette * png_sizeof(png_byte)));
 
          /* initialize the dither_sort array */
          for (i = 0; i < num_palette; i++)
@@ -296,9 +296,9 @@
 
          /* initialize palette index arrays */
          png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
-            (png_uint_32)(num_palette * png_sizeof (png_byte)));
+            (png_uint_32)(num_palette * png_sizeof(png_byte)));
          png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
-            (png_uint_32)(num_palette * png_sizeof (png_byte)));
+            (png_uint_32)(num_palette * png_sizeof(png_byte)));
 
          /* initialize the sort array */
          for (i = 0; i < num_palette; i++)
@@ -308,10 +308,10 @@
          }
 
          hash = (png_dsortpp)png_malloc(png_ptr, (png_uint_32)(769 *
-            png_sizeof (png_dsortp)));
+            png_sizeof(png_dsortp)));
          for (i = 0; i < 769; i++)
             hash[i] = NULL;
-/*         png_memset(hash, 0, 769 * png_sizeof (png_dsortp)); */
+/*         png_memset(hash, 0, 769 * png_sizeof(png_dsortp)); */
 
          num_new_palette = num_palette;
 
@@ -459,10 +459,10 @@
       png_size_t num_entries = ((png_size_t)1 << total_bits);
 
       png_ptr->palette_lookup = (png_bytep )png_malloc(png_ptr,
-         (png_uint_32)(num_entries * png_sizeof (png_byte)));
+         (png_uint_32)(num_entries * png_sizeof(png_byte)));
 
       png_memset(png_ptr->palette_lookup, 0, num_entries *
-         png_sizeof (png_byte));
+         png_sizeof(png_byte));
 
       distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
          png_sizeof(png_byte)));
@@ -527,7 +527,7 @@
 png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
 {
    png_debug(1, "in png_set_gamma\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
        (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
        (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
@@ -546,7 +546,7 @@
 png_set_expand(png_structp png_ptr)
 {
    png_debug(1, "in png_set_expand\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 }
@@ -573,7 +573,7 @@
 png_set_palette_to_rgb(png_structp png_ptr)
 {
    png_debug(1, "in png_set_palette_to_rgb\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 }
@@ -584,7 +584,7 @@
 png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
 {
    png_debug(1, "in png_set_expand_gray_1_2_4_to_8\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_EXPAND;
    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 }
@@ -597,7 +597,7 @@
 png_set_gray_1_2_4_to_8(png_structp png_ptr)
 {
    png_debug(1, "in png_set_gray_1_2_4_to_8\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
 }
 #endif
@@ -635,7 +635,7 @@
 {
       int red_fixed = (int)((float)red*100000.0 + 0.5);
       int green_fixed = (int)((float)green*100000.0 + 0.5);
-      if(png_ptr == NULL) return;
+      if (png_ptr == NULL) return;
       png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed);
 }
 #endif
@@ -645,7 +645,7 @@
    png_fixed_point red, png_fixed_point green)
 {
    png_debug(1, "in png_set_rgb_to_gray\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    switch(error_action)
    {
       case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY;
@@ -659,18 +659,19 @@
       png_ptr->transformations |= PNG_EXPAND;
 #else
    {
-      png_warning(png_ptr, "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED.");
+      png_warning(png_ptr,
+        "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED.");
       png_ptr->transformations &= ~PNG_RGB_TO_GRAY;
    }
 #endif
    {
       png_uint_16 red_int, green_int;
-      if(red < 0 || green < 0)
+      if (red < 0 || green < 0)
       {
          red_int   =  6968; /* .212671 * 32768 + .5 */
          green_int = 23434; /* .715160 * 32768 + .5 */
       }
-      else if(red + green < 100000L)
+      else if (red + green < 100000L)
       {
         red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
         green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
@@ -683,7 +684,8 @@
       }
       png_ptr->rgb_to_gray_red_coeff   = red_int;
       png_ptr->rgb_to_gray_green_coeff = green_int;
-      png_ptr->rgb_to_gray_blue_coeff  = (png_uint_16)(32768-red_int-green_int);
+      png_ptr->rgb_to_gray_blue_coeff  = 
+         (png_uint_16)(32768 - red_int - green_int);
    }
 }
 #endif
@@ -696,13 +698,13 @@
    read_user_transform_fn)
 {
    png_debug(1, "in png_set_read_user_transform_fn\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
    png_ptr->transformations |= PNG_USER_TRANSFORM;
    png_ptr->read_user_transform_fn = read_user_transform_fn;
 #endif
 #ifdef PNG_LEGACY_SUPPORTED
-   if(read_user_transform_fn)
+   if (read_user_transform_fn)
       png_warning(png_ptr,
         "This version of libpng does not support user transforms");
 #endif
@@ -717,7 +719,7 @@
 {
    png_debug(1, "in png_init_read_transformations\n");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
-   if(png_ptr != NULL)
+   if (png_ptr != NULL)
 #endif
   {
 #if defined(PNG_READ_BACKGROUND_SUPPORTED) || defined(PNG_READ_SHIFT_SUPPORTED) \
@@ -818,7 +820,7 @@
            {
            /* invert the alpha channel (in tRNS) unless the pixels are
               going to be expanded, in which case leave it for later */
-              int i,istop;
+              int i, istop;
               istop=(int)png_ptr->num_trans;
               for (i=0; i<istop; i++)
                  png_ptr->trans[i] = (png_byte)(255 - png_ptr->trans[i]);
@@ -839,7 +841,7 @@
        && (fabs(png_ptr->screen_gamma * png_ptr->gamma - 1.0)
          < PNG_GAMMA_THRESHOLD))
    {
-    int i,k;
+    int i, k;
     k=0;
     for (i=0; i<png_ptr->num_trans; i++)
     {
@@ -1110,7 +1112,7 @@
  }
 #if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \
  && !defined(PNG_READ_BACKGROUND_SUPPORTED)
-   if(png_ptr)
+   if (png_ptr)
       return;
 #endif
 }
@@ -1239,11 +1241,11 @@
 
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \
 defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
-   if(png_ptr->transformations & PNG_USER_TRANSFORM)
+   if (png_ptr->transformations & PNG_USER_TRANSFORM)
      {
-       if(info_ptr->bit_depth < png_ptr->user_transform_depth)
+       if (info_ptr->bit_depth < png_ptr->user_transform_depth)
          info_ptr->bit_depth = png_ptr->user_transform_depth;
-       if(info_ptr->channels < png_ptr->user_transform_channels)
+       if (info_ptr->channels < png_ptr->user_transform_channels)
          info_ptr->channels = png_ptr->user_transform_channels;
      }
 #endif
@@ -1251,10 +1253,10 @@
    info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
       info_ptr->bit_depth);
 
-   info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,info_ptr->width);
+   info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width);
 
 #if !defined(PNG_READ_EXPAND_SUPPORTED)
-   if(png_ptr)
+   if (png_ptr)
       return;
 #endif
 }
@@ -1273,7 +1275,7 @@
       char msg[50];
 
       png_snprintf2(msg, 50,
-         "NULL row buffer for row %ld, pass %d", png_ptr->row_number,
+         "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number,
          png_ptr->pass);
       png_error(png_ptr, msg);
 #else
@@ -1324,13 +1326,13 @@
    {
       int rgb_error =
          png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info), png_ptr->row_buf + 1);
-      if(rgb_error)
+      if (rgb_error)
       {
          png_ptr->rgb_to_gray_status=1;
-         if((png_ptr->transformations & PNG_RGB_TO_GRAY) == 
+         if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == 
              PNG_RGB_TO_GRAY_WARN)
             png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel");
-         if((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
+         if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
              PNG_RGB_TO_GRAY_ERR)
             png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel");
       }
@@ -1414,7 +1416,7 @@
    {
       png_do_dither((png_row_infop)&(png_ptr->row_info), png_ptr->row_buf + 1,
          png_ptr->palette_lookup, png_ptr->dither_index);
-      if(png_ptr->row_info.rowbytes == (png_uint_32)0)
+      if (png_ptr->row_info.rowbytes == (png_uint_32)0)
          png_error(png_ptr, "png_do_dither returned rowbytes=0");
    }
 #endif
@@ -1476,7 +1478,7 @@
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
    if (png_ptr->transformations & PNG_USER_TRANSFORM)
     {
-      if(png_ptr->read_user_transform_fn != NULL)
+      if (png_ptr->read_user_transform_fn != NULL)
         (*(png_ptr->read_user_transform_fn)) /* user read transform function */
           (png_ptr,                    /* png_ptr */
            &(png_ptr->row_info),       /* row_info:     */
@@ -1488,9 +1490,9 @@
              /*  png_byte pixel_depth;       bits per pixel (depth*channels) */
            png_ptr->row_buf + 1);      /* start of pixel data for row */
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
-      if(png_ptr->user_transform_depth)
+      if (png_ptr->user_transform_depth)
          png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
-      if(png_ptr->user_transform_channels)
+      if (png_ptr->user_transform_channels)
          png_ptr->row_info.channels = png_ptr->user_transform_channels;
 #endif
       png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
@@ -1967,7 +1969,7 @@
 #endif
        row_info->color_type == PNG_COLOR_TYPE_GRAY)
    {
-      if(row_info->bit_depth == 8)
+      if (row_info->bit_depth == 8)
       {
          /* This changes the data from G to GX */
          if (flags & PNG_FLAG_FILLER_AFTER)
@@ -1999,7 +2001,7 @@
             row_info->rowbytes = row_width * 2;
          }
       }
-      else if(row_info->bit_depth == 16)
+      else if (row_info->bit_depth == 16)
       {
          /* This changes the data from GG to GGXX */
          if (flags & PNG_FLAG_FILLER_AFTER)
@@ -2039,7 +2041,7 @@
    } /* COLOR_TYPE == GRAY */
    else if (row_info->color_type == PNG_COLOR_TYPE_RGB)
    {
-      if(row_info->bit_depth == 8)
+      if (row_info->bit_depth == 8)
       {
          /* This changes the data from RGB to RGBX */
          if (flags & PNG_FLAG_FILLER_AFTER)
@@ -2075,7 +2077,7 @@
             row_info->rowbytes = row_width * 4;
          }
       }
-      else if(row_info->bit_depth == 16)
+      else if (row_info->bit_depth == 16)
       {
          /* This changes the data from RRGGBB to RRGGBBXX */
          if (flags & PNG_FLAG_FILLER_AFTER)
@@ -2202,7 +2204,7 @@
       row_info->color_type |= PNG_COLOR_MASK_COLOR;
       row_info->pixel_depth = (png_byte)(row_info->channels *
          row_info->bit_depth);
-      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
    }
 }
 #endif
@@ -2210,8 +2212,11 @@
 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
 /* reduce RGB files to grayscale, with or without alpha
  * using the equation given in Poynton's ColorFAQ at
- * <http://www.inforamp.net/~poynton/>
+ * <http://www.inforamp.net/~poynton/>  (THIS LINK IS DEAD June 2008)
  * Copyright (c) 1998-01-04 Charles Poynton poynton at inforamp.net
+ * New links:
+ * <http://www.poynton.com/notes/colour_and_gamma/>
+ * Copyright (c) 2006-11-28 Charles Poynton poynton at poynton.com
  *
  *     Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
  *
@@ -2262,14 +2267,14 @@
                   png_byte red   = png_ptr->gamma_to_1[*(sp++)];
                   png_byte green = png_ptr->gamma_to_1[*(sp++)];
                   png_byte blue  = png_ptr->gamma_to_1[*(sp++)];
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                   {
                      rgb_error |= 1;
                      *(dp++) = png_ptr->gamma_from_1[
-                       (rc*red+gc*green+bc*blue)>>15];
+                       (rc*red + gc*green + bc*blue)>>15];
                   }
                   else
-                     *(dp++) = *(sp-1);
+                     *(dp++) = *(sp - 1);
                }
             }
             else
@@ -2282,13 +2287,13 @@
                   png_byte red   = *(sp++);
                   png_byte green = *(sp++);
                   png_byte blue  = *(sp++);
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                   {
                      rgb_error |= 1;
-                     *(dp++) = (png_byte)((rc*red+gc*green+bc*blue)>>15);
+                     *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
                   }
                   else
-                     *(dp++) = *(sp-1);
+                     *(dp++) = *(sp - 1);
                }
             }
          }
@@ -2309,7 +2314,7 @@
                   green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
                   blue  = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
 
-                  if(red == green && red == blue)
+                  if (red == green && red == blue)
                      w = red;
                   else
                   {
@@ -2343,7 +2348,7 @@
                   green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
                   blue  = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
 
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                      rgb_error |= 1;
                   gray16  = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
                   *(dp++) = (png_byte)((gray16>>8) & 0xff);
@@ -2366,7 +2371,7 @@
                   png_byte red   = png_ptr->gamma_to_1[*(sp++)];
                   png_byte green = png_ptr->gamma_to_1[*(sp++)];
                   png_byte blue  = png_ptr->gamma_to_1[*(sp++)];
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                      rgb_error |= 1;
                   *(dp++) =  png_ptr->gamma_from_1
                              [(rc*red + gc*green + bc*blue)>>15];
@@ -2383,7 +2388,7 @@
                   png_byte red   = *(sp++);
                   png_byte green = *(sp++);
                   png_byte blue  = *(sp++);
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                      rgb_error |= 1;
                   *(dp++) =  (png_byte)((rc*red + gc*green + bc*blue)>>15);
                   *(dp++) = *(sp++);  /* alpha */
@@ -2406,7 +2411,7 @@
                   green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
                   blue  = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
 
-                  if(red == green && red == blue)
+                  if (red == green && red == blue)
                      w = red;
                   else
                   {
@@ -2440,7 +2445,7 @@
                   red   = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
                   green = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
                   blue  = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
-                  if(red != green || red != blue)
+                  if (red != green || red != blue)
                      rgb_error |= 1;
                   gray16  = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
                   *(dp++) = (png_byte)((gray16>>8) & 0xff);
@@ -2455,7 +2460,7 @@
       row_info->color_type &= ~PNG_COLOR_MASK_COLOR;
       row_info->pixel_depth = (png_byte)(row_info->channels *
          row_info->bit_depth);
-      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
    }
    return rgb_error;
 }
@@ -3373,7 +3378,7 @@
          row_info->channels--;
          row_info->pixel_depth = (png_byte)(row_info->channels *
             row_info->bit_depth);
-         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
       }
    }
 }
@@ -3832,7 +3837,7 @@
                dp = row + (row_info->rowbytes << 1) - 1;
                for (i = 0; i < row_width; i++)
                {
-                  if (*(sp-1) == gray_high && *(sp) == gray_low) 
+                  if (*(sp - 1) == gray_high && *(sp) == gray_low) 
                   {
                      *dp-- = 0;
                      *dp-- = 0;
@@ -3911,7 +3916,7 @@
          row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
          row_info->channels = 4;
          row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2);
-         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
       }
    }
 }
@@ -3964,7 +3969,7 @@
          row_info->color_type = PNG_COLOR_TYPE_PALETTE;
          row_info->channels = 1;
          row_info->pixel_depth = row_info->bit_depth;
-         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
       }
       else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
          palette_lookup != NULL && row_info->bit_depth == 8)
@@ -3993,7 +3998,7 @@
          row_info->color_type = PNG_COLOR_TYPE_PALETTE;
          row_info->channels = 1;
          row_info->pixel_depth = row_info->bit_depth;
-         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,row_width);
+         row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
       }
       else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE &&
          dither_lookup && row_info->bit_depth == 8)
@@ -4062,7 +4067,7 @@
         png_ptr->gamma_from_1 = (png_bytep)png_malloc(png_ptr,
            (png_uint_32)256);
 
-        if(png_ptr->screen_gamma > 0.000001)
+        if (png_ptr->screen_gamma > 0.000001)
            g = 1.0 / png_ptr->screen_gamma;
         else
            g = png_ptr->gamma;   /* probably doing rgb_to_gray */
@@ -4122,7 +4127,7 @@
         g = 1.0;
 
      png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr,
-        (png_uint_32)(num * png_sizeof (png_uint_16p)));
+        (png_uint_32)(num * png_sizeof(png_uint_16p)));
 
      if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
      {
@@ -4132,7 +4137,7 @@
         for (i = 0; i < num; i++)
         {
            png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr,
-              (png_uint_32)(256 * png_sizeof (png_uint_16)));
+              (png_uint_32)(256 * png_sizeof(png_uint_16)));
         }
 
         g = 1.0 / g;
@@ -4162,7 +4167,7 @@
         for (i = 0; i < num; i++)
         {
            png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr,
-              (png_uint_32)(256 * png_sizeof (png_uint_16)));
+              (png_uint_32)(256 * png_sizeof(png_uint_16)));
 
            ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4);
            for (j = 0; j < 256; j++)
@@ -4182,12 +4187,12 @@
         g = 1.0 / (png_ptr->gamma);
 
         png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr,
-           (png_uint_32)(num * png_sizeof (png_uint_16p )));
+           (png_uint_32)(num * png_sizeof(png_uint_16p )));
 
         for (i = 0; i < num; i++)
         {
            png_ptr->gamma_16_to_1[i] = (png_uint_16p)png_malloc(png_ptr,
-              (png_uint_32)(256 * png_sizeof (png_uint_16)));
+              (png_uint_32)(256 * png_sizeof(png_uint_16)));
 
            ig = (((png_uint_32)i *
               (png_uint_32)png_gamma_shift[shift]) >> 4);
@@ -4199,18 +4204,18 @@
            }
         }
 
-        if(png_ptr->screen_gamma > 0.000001)
+        if (png_ptr->screen_gamma > 0.000001)
            g = 1.0 / png_ptr->screen_gamma;
         else
            g = png_ptr->gamma;   /* probably doing rgb_to_gray */
 
         png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr,
-           (png_uint_32)(num * png_sizeof (png_uint_16p)));
+           (png_uint_32)(num * png_sizeof(png_uint_16p)));
 
         for (i = 0; i < num; i++)
         {
            png_ptr->gamma_16_from_1[i] = (png_uint_16p)png_malloc(png_ptr,
-              (png_uint_32)(256 * png_sizeof (png_uint_16)));
+              (png_uint_32)(256 * png_sizeof(png_uint_16)));
 
            ig = (((png_uint_32)i *
               (png_uint_32)png_gamma_shift[shift]) >> 4);
@@ -4275,11 +4280,11 @@
 
          for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
          {
-            png_uint_32 s0   = (*(rp  ) << 8) | *(rp+1);
-            png_uint_32 s1   = (*(rp+2) << 8) | *(rp+3);
-            png_uint_32 s2   = (*(rp+4) << 8) | *(rp+5);
-            png_uint_32 red  = (png_uint_32)((s0+s1+65536L) & 0xffffL);
-            png_uint_32 blue = (png_uint_32)((s2+s1+65536L) & 0xffffL);
+            png_uint_32 s0   = (*(rp    ) << 8) | *(rp + 1);
+            png_uint_32 s1   = (*(rp + 2) << 8) | *(rp + 3);
+            png_uint_32 s2   = (*(rp + 4) << 8) | *(rp + 5);
+            png_uint_32 red  = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL);
+            png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL);
             *(rp  ) = (png_byte)((red >> 8) & 0xff);
             *(rp+1) = (png_byte)(red & 0xff);
             *(rp+4) = (png_byte)((blue >> 8) & 0xff);
diff --git a/pngrutil.c b/pngrutil.c
index 531cb05..1647079 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED)
 
 #if defined(_WIN32_WCE) && (_WIN32_WCE<0x500)
@@ -30,7 +29,7 @@
    wchar_t *str, *end;
 
    len = MultiByteToWideChar(CP_ACP, 0, nptr, -1, NULL, 0);
-   str = (wchar_t *)png_malloc(png_ptr, len * sizeof(wchar_t));
+   str = (wchar_t *)png_malloc(png_ptr, len * png_sizeof(wchar_t));
    if ( NULL != str )
    {
       MultiByteToWideChar(CP_ACP, 0, nptr, -1, str, len);
@@ -49,7 +48,15 @@
 png_uint_32 PNGAPI
 png_get_uint_31(png_structp png_ptr, png_bytep buf)
 {
+#ifdef PNG_READ_BIG_ENDIAN_SUPPORTED
    png_uint_32 i = png_get_uint_32(buf);
+#else
+   /* Avoid an extra function call by inlining the result. */
+   png_uint_32 i = ((png_uint_32)(*buf) << 24) +
+      ((png_uint_32)(*(buf + 1)) << 16) +
+      ((png_uint_32)(*(buf + 2)) << 8) +
+      (png_uint_32)(*(buf + 3));
+#endif
    if (i > PNG_UINT_31_MAX)
      png_error(png_ptr, "PNG unsigned integer out of range.");
    return (i);
@@ -92,11 +99,37 @@
 }
 #endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */
 
+/* Read the chunk header (length + type name).
+ * Put the type name into png_ptr->chunk_name, and return the length.
+ */
+png_uint_32 /* PRIVATE */
+png_read_chunk_header(png_structp png_ptr)
+{
+   png_byte buf[8];
+   png_uint_32 length;
+
+   /* read the length and the chunk name */
+   png_read_data(png_ptr, buf, 8);
+   length = png_get_uint_31(png_ptr, buf);
+
+   /* put the chunk name into png_ptr->chunk_name */
+   png_memcpy(png_ptr->chunk_name, buf + 4, 4);
+
+   png_debug2(0, "Reading %s chunk, length = %lu\n",
+      png_ptr->chunk_name, length);
+
+   /* reset the crc and run it over the chunk name */
+   png_reset_crc(png_ptr);
+   png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
+
+   return length;
+}
+
 /* Read data, and (optionally) run it through the CRC. */
 void /* PRIVATE */
 png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_read_data(png_ptr, buf, length);
    png_calculate_crc(png_ptr, buf, length);
 }
@@ -218,8 +251,8 @@
                text = (png_charp)png_malloc_warn(png_ptr, text_size);
                if (text ==  NULL)
                  {
-                    png_free(png_ptr,chunkdata);
-                    png_error(png_ptr,"Not enough memory to decompress chunk");
+                    png_free(png_ptr, chunkdata);
+                    png_error(png_ptr, "Not enough memory to decompress chunk");
                  }
                png_memcpy(text, chunkdata, prefix_size);
             }
@@ -228,8 +261,8 @@
 
             /* Copy what we can of the error message into the text chunk */
             text_size = (png_size_t)(chunklength - (text - chunkdata) - 1);
-            text_size = png_sizeof(msg) > text_size ? text_size :
-               png_sizeof(msg);
+            if (text_size > png_sizeof(msg))
+               text_size = png_sizeof(msg);
             png_memcpy(text + prefix_size, msg, text_size);
             break;
          }
@@ -241,10 +274,11 @@
                    png_ptr->zbuf_size - png_ptr->zstream.avail_out;
                text = (png_charp)png_malloc_warn(png_ptr, text_size + 1);
                if (text ==  NULL)
-                 {
-                    png_free(png_ptr,chunkdata);
-                    png_error(png_ptr,"Not enough memory to decompress chunk.");
-                 }
+               {
+                  png_free(png_ptr, chunkdata);
+                  png_error(png_ptr,
+                    "Not enough memory to decompress chunk.");
+               }
                png_memcpy(text + prefix_size, png_ptr->zbuf,
                     text_size - prefix_size);
                png_memcpy(text, chunkdata, prefix_size);
@@ -262,7 +296,8 @@
                {
                   png_free(png_ptr, tmp);
                   png_free(png_ptr, chunkdata);
-                  png_error(png_ptr,"Not enough memory to decompress chunk..");
+                  png_error(png_ptr,
+                    "Not enough memory to decompress chunk..");
                }
                png_memcpy(text, tmp, text_size);
                png_free(png_ptr, tmp);
@@ -302,14 +337,14 @@
          png_warning(png_ptr,
             "Incomplete compressed datastream in chunk other than IDAT");
 #endif
-         text_size=prefix_size;
+         text_size = prefix_size;
          if (text ==  NULL)
          {
             text = (png_charp)png_malloc_warn(png_ptr, text_size+1);
             if (text == NULL)
               {
                 png_free(png_ptr, chunkdata);
-                png_error(png_ptr,"Not enough memory for text.");
+                png_error(png_ptr, "Not enough memory for text.");
               }
             png_memcpy(text, chunkdata, prefix_size);
          }
@@ -328,15 +363,14 @@
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
       char umsg[50];
 
-      png_snprintf(umsg, 50,
-         "Unknown zTXt compression type %d", comp_type);
+      png_snprintf(umsg, 50, "Unknown zTXt compression type %d", comp_type);
       png_warning(png_ptr, umsg);
 #else
       png_warning(png_ptr, "Unknown zTXt compression type");
 #endif
 
       *(chunkdata + prefix_size) = 0x00;
-      *newlength=prefix_size;
+      *newlength = prefix_size;
    }
 
    return chunkdata;
@@ -406,10 +440,10 @@
    /* set up other useful info */
    png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth *
    png_ptr->channels);
-   png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width);
-   png_debug1(3,"bit_depth = %d\n", png_ptr->bit_depth);
-   png_debug1(3,"channels = %d\n", png_ptr->channels);
-   png_debug1(3,"rowbytes = %lu\n", png_ptr->rowbytes);
+   png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
+   png_debug1(3, "bit_depth = %d\n", png_ptr->bit_depth);
+   png_debug1(3, "channels = %d\n", png_ptr->channels);
+   png_debug1(3, "rowbytes = %lu\n", png_ptr->rowbytes);
    png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth,
       color_type, interlace_type, compression_type, filter_type);
 }
@@ -515,6 +549,7 @@
          if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)
          {
             png_chunk_error(png_ptr, "CRC error");
+%15+%            png_chunk_benign_error(png_ptr, "CRC error");
          }
          else
          {
@@ -571,7 +606,7 @@
    }
    png_crc_finish(png_ptr, length);
 
-   info_ptr =info_ptr; /* quiet compiler warnings about unused info_ptr */
+   info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
 }
 
 #if defined(PNG_READ_gAMA_SUPPORTED)
@@ -725,7 +760,7 @@
 void /* PRIVATE */
 png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 {
-   png_byte buf[4];
+   png_byte buf[32];
 #ifdef PNG_FLOATING_POINT_SUPPORTED
    float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
 #endif
@@ -766,62 +801,46 @@
       return;
    }
 
-   png_crc_read(png_ptr, buf, 4);
+   png_crc_read(png_ptr, buf, 32);
+   if (png_crc_finish(png_ptr, 0))
+      return;
+
    uint_x = png_get_uint_32(buf);
-
-   png_crc_read(png_ptr, buf, 4);
-   uint_y = png_get_uint_32(buf);
-
+   uint_y = png_get_uint_32(buf + 4);
    if (uint_x > 80000L || uint_y > 80000L ||
       uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM white point");
-      png_crc_finish(png_ptr, 24);
       return;
    }
    int_x_white = (png_fixed_point)uint_x;
    int_y_white = (png_fixed_point)uint_y;
 
-   png_crc_read(png_ptr, buf, 4);
-   uint_x = png_get_uint_32(buf);
-
-   png_crc_read(png_ptr, buf, 4);
-   uint_y = png_get_uint_32(buf);
-
+   uint_x = png_get_uint_32(buf + 8);
+   uint_y = png_get_uint_32(buf + 12);
    if (uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM red point");
-      png_crc_finish(png_ptr, 16);
       return;
    }
    int_x_red = (png_fixed_point)uint_x;
    int_y_red = (png_fixed_point)uint_y;
 
-   png_crc_read(png_ptr, buf, 4);
-   uint_x = png_get_uint_32(buf);
-
-   png_crc_read(png_ptr, buf, 4);
-   uint_y = png_get_uint_32(buf);
-
+   uint_x = png_get_uint_32(buf + 16);
+   uint_y = png_get_uint_32(buf + 20);
    if (uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM green point");
-      png_crc_finish(png_ptr, 8);
       return;
    }
    int_x_green = (png_fixed_point)uint_x;
    int_y_green = (png_fixed_point)uint_y;
 
-   png_crc_read(png_ptr, buf, 4);
-   uint_x = png_get_uint_32(buf);
-
-   png_crc_read(png_ptr, buf, 4);
-   uint_y = png_get_uint_32(buf);
-
+   uint_x = png_get_uint_32(buf + 24);
+   uint_y = png_get_uint_32(buf + 28);
    if (uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM blue point");
-      png_crc_finish(png_ptr, 0);
       return;
    }
    int_x_blue = (png_fixed_point)uint_x;
@@ -854,19 +873,18 @@
               "Ignoring incorrect cHRM value when sRGB is also present");
 #ifndef PNG_NO_CONSOLE_IO
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-            fprintf(stderr,"wx=%f, wy=%f, rx=%f, ry=%f\n",
+            fprintf(stderr, "wx=%f, wy=%f, rx=%f, ry=%f\n",
                white_x, white_y, red_x, red_y);
-            fprintf(stderr,"gx=%f, gy=%f, bx=%f, by=%f\n",
+            fprintf(stderr, "gx=%f, gy=%f, bx=%f, by=%f\n",
                green_x, green_y, blue_x, blue_y);
 #else
-            fprintf(stderr,"wx=%ld, wy=%ld, rx=%ld, ry=%ld\n",
+            fprintf(stderr, "wx=%ld, wy=%ld, rx=%ld, ry=%ld\n",
                int_x_white, int_y_white, int_x_red, int_y_red);
-            fprintf(stderr,"gx=%ld, gy=%ld, bx=%ld, by=%ld\n",
+            fprintf(stderr, "gx=%ld, gy=%ld, bx=%ld, by=%ld\n",
                int_x_green, int_y_green, int_x_blue, int_y_blue);
 #endif
 #endif /* PNG_NO_CONSOLE_IO */
          }
-         png_crc_finish(png_ptr, 0);
          return;
       }
 #endif /* PNG_READ_sRGB_SUPPORTED */
@@ -949,10 +967,11 @@
            "Ignoring incorrect gAMA value when sRGB is also present");
 #ifndef PNG_NO_CONSOLE_IO
 #  ifdef PNG_FIXED_POINT_SUPPORTED
-         fprintf(stderr,"incorrect gamma=(%d/100000)\n",(int)png_ptr->int_gamma);
+         fprintf(stderr, "incorrect gamma=(%d/100000)\n",
+            (int)png_ptr->int_gamma);
 #  else
 #    ifdef PNG_FLOATING_POINT_SUPPORTED
-         fprintf(stderr,"incorrect gamma=%f\n",png_ptr->gamma);
+         fprintf(stderr, "incorrect gamma=%f\n", png_ptr->gamma);
 #    endif
 #  endif
 #endif
@@ -1056,7 +1075,7 @@
    if (compression_type)
    {
       png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
-      compression_type=0x00;  /* Reset it to zero (libpng-1.0.6 through 1.0.8
+      compression_type = 0x00;  /* Reset it to zero (libpng-1.0.6 through 1.0.8
                                  wrote nonzero) */
    }
 
@@ -1074,16 +1093,16 @@
    }
 
    /* Check the profile_size recorded in the first 32 bits of the ICC profile */
-   pC = (png_bytep)(chunkdata+prefix_length);
+   pC = (png_bytep)(chunkdata + prefix_length);
    profile_size = ((*(pC  ))<<24) |
-                  ((*(pC+1))<<16) |
-                  ((*(pC+2))<< 8) |
-                  ((*(pC+3))    );
+                  ((*(pC + 1))<<16) |
+                  ((*(pC + 2))<< 8) |
+                  ((*(pC + 3))    );
 
-   if(profile_size < profile_length)
+   if (profile_size < profile_length)
       profile_length = profile_size;
 
-   if(profile_size > profile_length)
+   if (profile_size > profile_length)
    {
       png_free(png_ptr, chunkdata);
       png_warning(png_ptr, "Ignoring truncated iCCP profile.");
@@ -1168,8 +1187,8 @@
    }
 
    new_palette.nentries = (png_int_32) ( data_length / entry_size);
-   if ((png_uint_32) new_palette.nentries > (png_uint_32) (PNG_SIZE_MAX /
-       png_sizeof(png_sPLT_entry)))
+   if ((png_uint_32) new_palette.nentries >
+       (png_uint_32) (PNG_SIZE_MAX / png_sizeof(png_sPLT_entry)))
    {
        png_warning(png_ptr, "sPLT chunk too long");
        return;
@@ -1389,7 +1408,7 @@
       png_ptr->background.index = buf[0];
       if (info_ptr && info_ptr->num_palette)
       {
-          if(buf[0] > info_ptr->num_palette)
+          if (buf[0] > info_ptr->num_palette)
           {
              png_warning(png_ptr, "Incorrect bKGD chunk index value");
              return;
@@ -1652,8 +1671,8 @@
       /* Empty loop to move past the units string. */ ;
 
    png_debug(3, "Allocating pCAL parameters array\n");
-   params = (png_charpp)png_malloc_warn(png_ptr, (png_uint_32)(nparams
-      *png_sizeof(png_charp))) ;
+   params = (png_charpp)png_malloc_warn(png_ptr,
+      (png_uint_32)(nparams * png_sizeof(png_charp))) ;
    if (params == NULL)
      {
        png_free(png_ptr, purpose);
@@ -1725,10 +1744,10 @@
       length + 1);
    buffer = (png_charp)png_malloc_warn(png_ptr, length + 1);
    if (buffer == NULL)
-     {
-       png_warning(png_ptr, "Out of memory while processing sCAL chunk");
-       return;
-     }
+   {
+      png_warning(png_ptr, "Out of memory while processing sCAL chunk");
+      return;
+   }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)buffer, slength);
 
@@ -1746,17 +1765,17 @@
    width = png_strtod(png_ptr, ep, &vp);
    if (*vp)
    {
-       png_warning(png_ptr, "malformed width string in sCAL chunk");
-       return;
+      png_warning(png_ptr, "malformed width string in sCAL chunk");
+      return;
    }
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
    swidth = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
    if (swidth == NULL)
-     {
-       png_warning(png_ptr, "Out of memory while processing sCAL chunk width");
-       return;
-     }
+   {
+      png_warning(png_ptr, "Out of memory while processing sCAL chunk width");
+      return;
+   }
    png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
@@ -1767,30 +1786,30 @@
 
    if (buffer + slength < ep)
    {
-       png_warning(png_ptr, "Truncated sCAL chunk");
+      png_warning(png_ptr, "Truncated sCAL chunk");
 #if defined(PNG_FIXED_POINT_SUPPORTED) && \
     !defined(PNG_FLOATING_POINT_SUPPORTED)
-       png_free(png_ptr, swidth);
+      png_free(png_ptr, swidth);
 #endif
       png_free(png_ptr, buffer);
-       return;
+      return;
    }
 
 #ifdef PNG_FLOATING_POINT_SUPPORTED
    height = png_strtod(png_ptr, ep, &vp);
    if (*vp)
    {
-       png_warning(png_ptr, "malformed height string in sCAL chunk");
-       return;
+      png_warning(png_ptr, "malformed height string in sCAL chunk");
+      return;
    }
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
    sheight = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
    if (sheight == NULL)
-     {
-       png_warning(png_ptr, "Out of memory while processing sCAL chunk height");
-       return;
-     }
+   {
+      png_warning(png_ptr, "Out of memory while processing sCAL chunk height");
+      return;
+   }
    png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
@@ -1940,7 +1959,7 @@
    text_ptr->text = text;
    text_ptr->text_length = png_strlen(text);
 
-   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+   ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, key);
    png_free(png_ptr, text_ptr);
@@ -1973,7 +1992,7 @@
       there is no hard and fast rule to tell us where to stop. */
    if (length > (png_uint_32)65535L)
    {
-     png_warning(png_ptr,"zTXt chunk too large to fit in memory");
+     png_warning(png_ptr, "zTXt chunk too large to fit in memory");
      png_crc_finish(png_ptr, length);
      return;
    }
@@ -1982,7 +2001,7 @@
    chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
    if (chunkdata == NULL)
    {
-     png_warning(png_ptr,"Out of memory processing zTXt chunk.");
+     png_warning(png_ptr, "Out of memory processing zTXt chunk.");
      return;
    }
    slength = (png_size_t)length;
@@ -2021,10 +2040,10 @@
                                     (png_size_t)length, prefix_len, &data_len);
 
    text_ptr = (png_textp)png_malloc_warn(png_ptr,
-     (png_uint_32)png_sizeof(png_text));
+      (png_uint_32)png_sizeof(png_text));
    if (text_ptr == NULL)
    {
-     png_warning(png_ptr,"Not enough memory to process zTXt chunk.");
+     png_warning(png_ptr, "Not enough memory to process zTXt chunk.");
      png_free(png_ptr, chunkdata);
      return;
    }
@@ -2038,7 +2057,7 @@
    text_ptr->text = chunkdata + prefix_len;
    text_ptr->text_length = data_len;
 
-   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+   ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, text_ptr);
    png_free(png_ptr, chunkdata);
@@ -2073,7 +2092,7 @@
       there is no hard and fast rule to tell us where to stop. */
    if (length > (png_uint_32)65535L)
    {
-     png_warning(png_ptr,"iTXt chunk too large to fit in memory");
+     png_warning(png_ptr, "iTXt chunk too large to fit in memory");
      png_crc_finish(png_ptr, length);
      return;
    }
@@ -2143,24 +2162,24 @@
        chunkdata = png_decompress_chunk(png_ptr, comp_type, chunkdata,
           (size_t)length, prefix_len, &data_len);
    else
-       data_len=png_strlen(chunkdata + prefix_len);
+       data_len = png_strlen(chunkdata + prefix_len);
    text_ptr = (png_textp)png_malloc_warn(png_ptr,
       (png_uint_32)png_sizeof(png_text));
    if (text_ptr == NULL)
    {
-     png_warning(png_ptr,"Not enough memory to process iTXt chunk.");
+     png_warning(png_ptr, "Not enough memory to process iTXt chunk.");
      png_free(png_ptr, chunkdata);
      return;
    }
    text_ptr->compression = (int)comp_flag + 1;
-   text_ptr->lang_key = chunkdata+(lang_key-key);
-   text_ptr->lang = chunkdata+(lang-key);
+   text_ptr->lang_key = chunkdata + (lang_key - key);
+   text_ptr->lang = chunkdata + (lang - key);
    text_ptr->itxt_length = data_len;
    text_ptr->text_length = 0;
    text_ptr->key = chunkdata;
    text_ptr->text = chunkdata + prefix_len;
 
-   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+   ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, text_ptr);
    png_free(png_ptr, chunkdata);
@@ -2195,7 +2214,7 @@
    if (!(png_ptr->chunk_name[0] & 0x20))
    {
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
-      if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+      if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
            PNG_HANDLE_CHUNK_ALWAYS
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
            && png_ptr->read_user_chunk_fn == NULL
@@ -2230,7 +2249,7 @@
          png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
        }
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-       if(png_ptr->read_user_chunk_fn != NULL)
+       if (png_ptr->read_user_chunk_fn != NULL)
        {
           /* callback to user unknown chunk handler */
           int ret;
@@ -2241,7 +2260,7 @@
           if (ret == 0)
           {
              if (!(png_ptr->chunk_name[0] & 0x20))
-                if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+                if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
                      PNG_HANDLE_CHUNK_ALWAYS)
                    png_chunk_error(png_ptr, "unknown critical chunk");
              png_set_unknown_chunks(png_ptr, info_ptr,
@@ -2298,7 +2317,7 @@
 void /* PRIVATE */
 png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 {
-   png_debug(1,"in png_combine_row\n");
+   png_debug(1, "in png_combine_row\n");
    if (mask == 0xff)
    {
       png_memcpy(row, png_ptr->row_buf + 1,
@@ -2514,7 +2533,7 @@
    PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
 #endif
 
-   png_debug(1,"in png_do_read_interlace\n");
+   png_debug(1, "in png_do_read_interlace\n");
    if (row != NULL && row_info != NULL)
    {
       png_uint_32 final_width;
@@ -2715,7 +2734,7 @@
          }
       }
       row_info->width = final_width;
-      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,final_width);
+      row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
    }
 #if !defined(PNG_READ_PACKSWAP_SUPPORTED)
    transformations = transformations; /* silence compiler warning */
@@ -2728,7 +2747,7 @@
    png_bytep prev_row, int filter)
 {
    png_debug(1, "in png_read_filter_row\n");
-   png_debug2(2,"row = %lu, filter = %d\n", png_ptr->row_number, filter);
+   png_debug2(2, "row = %lu, filter = %d\n", png_ptr->row_number, filter);
    switch (filter)
    {
       case PNG_FILTER_VALUE_NONE:
@@ -2832,7 +2851,7 @@
                   p = c;
              */
 
-            p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c;
+            p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
 
             *rp = (png_byte)(((int)(*rp) + p) & 0xff);
             rp++;
@@ -2841,7 +2860,7 @@
       }
       default:
          png_warning(png_ptr, "Ignoring bad adaptive filter type");
-         *row=0;
+         *row = 0;
          break;
    }
 }
@@ -2919,7 +2938,7 @@
 
       png_ptr->zstream.next_out = (Byte *)&extra;
       png_ptr->zstream.avail_out = (uInt)1;
-      for(;;)
+      for (;;)
       {
          if (!(png_ptr->zstream.avail_in))
          {
@@ -3000,7 +3019,7 @@
 #endif
 
    int max_pixel_depth;
-   png_uint_32 row_bytes;
+   png_size_t row_bytes;
 
    png_debug(1, "in png_read_start_row\n");
    png_ptr->zstream.avail_in = 0;
@@ -3019,11 +3038,8 @@
          png_pass_start[png_ptr->pass]) /
          png_pass_inc[png_ptr->pass];
 
-         row_bytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->iwidth) + 1;
-
-         png_ptr->irowbytes = (png_size_t)row_bytes;
-         if((png_uint_32)png_ptr->irowbytes != row_bytes)
-            png_error(png_ptr, "Rowbytes overflow in png_read_start_row");
+         png_ptr->irowbytes =
+            PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1;
    }
    else
 #endif /* PNG_READ_INTERLACING_SUPPORTED */
@@ -3125,11 +3141,11 @@
 
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \
 defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
-   if(png_ptr->transformations & PNG_USER_TRANSFORM)
+   if (png_ptr->transformations & PNG_USER_TRANSFORM)
      {
-       int user_pixel_depth=png_ptr->user_transform_depth*
+       int user_pixel_depth = png_ptr->user_transform_depth*
          png_ptr->user_transform_channels;
-       if(user_pixel_depth > max_pixel_depth)
+       if (user_pixel_depth > max_pixel_depth)
          max_pixel_depth=user_pixel_depth;
      }
 #endif
@@ -3139,16 +3155,16 @@
    row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7));
    /* calculate the maximum bytes needed, adding a byte and a pixel
       for safety's sake */
-   row_bytes = PNG_ROWBYTES(max_pixel_depth,row_bytes) +
+   row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) +
       1 + ((max_pixel_depth + 7) >> 3);
 #ifdef PNG_MAX_MALLOC_64K
    if (row_bytes > (png_uint_32)65536L)
       png_error(png_ptr, "This image requires a row greater than 64KB");
 #endif
 
-   if(row_bytes + 64 > png_ptr->old_big_row_buf_size)
+   if (row_bytes + 64 > png_ptr->old_big_row_buf_size)
    {
-     png_free(png_ptr,png_ptr->big_row_buf);
+     png_free(png_ptr, png_ptr->big_row_buf);
      png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
      png_ptr->row_buf = png_ptr->big_row_buf+32;
      png_ptr->old_big_row_buf_size = row_bytes+64;
@@ -3161,9 +3177,9 @@
    if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1))
       png_error(png_ptr, "Row has too many bytes to allocate in memory.");
 
-   if(png_ptr->rowbytes+1 > png_ptr->old_prev_row_size)
+   if (png_ptr->rowbytes+1 > png_ptr->old_prev_row_size)
    {
-     png_free(png_ptr,png_ptr->prev_row);
+     png_free(png_ptr, png_ptr->prev_row);
      png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
         png_ptr->rowbytes + 1));
      png_ptr->old_prev_row_size = png_ptr->rowbytes+1;
diff --git a/pngset.c b/pngset.c
index 8b25ca5..5d53a4e 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -15,7 +15,6 @@
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
 #if defined(PNG_bKGD_SUPPORTED)
@@ -174,7 +173,7 @@
    info_ptr->int_gamma = (int)(gamma*100000.+.5);
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
-   if(gamma == 0.0)
+   if (gamma == 0.0)
       png_warning(png_ptr, "Setting gamma=0");
 }
 #endif
@@ -198,7 +197,7 @@
      if (int_gamma < 0)
      {
        png_warning(png_ptr, "Setting negative gamma to zero");
-       gamma=0;
+       gamma = 0;
      }
      else
        gamma=int_gamma;
@@ -210,7 +209,7 @@
    info_ptr->int_gamma = gamma;
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
-   if(gamma == 0)
+   if (gamma == 0)
       png_warning(png_ptr, "Setting gamma=0");
 }
 #endif
@@ -238,7 +237,7 @@
    /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
       1.2.1 */
    png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
-      (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof (png_uint_16)));
+      (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
    if (png_ptr->hist == NULL)
      {
        png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
@@ -319,21 +318,21 @@
     * 4. The filter_method is 64 and
     * 5. The color_type is RGB or RGBA
     */
-   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
-      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
-   if(filter_type != PNG_FILTER_TYPE_BASE)
+   if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
+      png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
+   if (filter_type != PNG_FILTER_TYPE_BASE)
    {
-     if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+     if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
         (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
         ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
         (color_type == PNG_COLOR_TYPE_RGB ||
          color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
         png_error(png_ptr, "Unknown filter method in IHDR");
-     if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
+     if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
         png_warning(png_ptr, "Invalid filter method in IHDR");
    }
 #else
-   if(filter_type != PNG_FILTER_TYPE_BASE)
+   if (filter_type != PNG_FILTER_TYPE_BASE)
       png_error(png_ptr, "Unknown filter method in IHDR");
 #endif
 
@@ -363,7 +362,7 @@
                  - 8)       /* extra max_pixel_depth pad */
       info_ptr->rowbytes = (png_size_t)0;
    else
-      info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
+      info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
 }
 
 #if defined(PNG_oFFs_SUPPORTED)
@@ -396,13 +395,14 @@
       return;
 
    length = png_strlen(purpose) + 1;
-   png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
+   png_debug1(3, "allocating purpose for info (%lu bytes)\n",
+     (unsigned long)length);
    info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->pcal_purpose == NULL)
-     {
+   {
        png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
-       return;
-     }
+      return;
+   }
    png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
 
    png_debug(3, "storing X0, X1, type, and nparams in info\n");
@@ -412,35 +412,37 @@
    info_ptr->pcal_nparams = (png_byte)nparams;
 
    length = png_strlen(units) + 1;
-   png_debug1(3, "allocating units for info (%lu bytes)\n", length);
+   png_debug1(3, "allocating units for info (%lu bytes)\n",
+     (unsigned long)length);
    info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->pcal_units == NULL)
-     {
+   {
        png_warning(png_ptr, "Insufficient memory for pCAL units.");
-       return;
-     }
+      return;
+   }
    png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
 
    info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
       (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
    if (info_ptr->pcal_params == NULL)
-     {
+   {
        png_warning(png_ptr, "Insufficient memory for pCAL params.");
-       return;
-     }
+      return;
+   }
 
    info_ptr->pcal_params[nparams] = NULL;
 
    for (i = 0; i < nparams; i++)
    {
       length = png_strlen(params[i]) + 1;
-      png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
+      png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i,
+        (unsigned long)length);
       info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
       if (info_ptr->pcal_params[i] == NULL)
-        {
+      {
           png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
           return;
-        }
+      }
       png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
    }
 
@@ -482,7 +484,8 @@
    info_ptr->scal_unit = (png_byte)unit;
 
    length = png_strlen(swidth) + 1;
-   png_debug1(3, "allocating unit for info (%d bytes)\n", length);
+   png_debug1(3, "allocating unit for info (%u bytes)\n",
+      (unsigned int)length);
    info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->scal_s_width == NULL)
    {
@@ -493,7 +496,8 @@
    png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
 
    length = png_strlen(sheight) + 1;
-   png_debug1(3, "allocating unit for info (%d bytes)\n", length);
+   png_debug1(3, "allocating unit for info (%u bytes)\n",
+      (unsigned int)length);
    info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->scal_s_height == NULL)
    {
@@ -564,7 +568,7 @@
       PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
    png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
       png_sizeof(png_color));
-   png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof (png_color));
+   png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
    info_ptr->palette = png_ptr->palette;
    info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
 
@@ -586,7 +590,7 @@
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof (png_color_8));
+   png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
    info_ptr->valid |= PNG_INFO_sBIT;
 }
 #endif
@@ -700,7 +704,8 @@
    if (new_iccp_profile == NULL)
    {
       png_free (png_ptr, new_iccp_name);
-      png_warning(png_ptr, "Insufficient memory to process iCCP profile.");
+      png_warning(png_ptr,
+      "Insufficient memory to process iCCP profile.");
       return;
    }
    png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
@@ -757,7 +762,7 @@
          info_ptr->max_text = info_ptr->num_text + num_text + 8;
          old_text = info_ptr->text;
          info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
-            (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
+            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
          if (info_ptr->text == NULL)
            {
              png_free(png_ptr, old_text);
@@ -772,7 +777,7 @@
          info_ptr->max_text = num_text + 8;
          info_ptr->num_text = 0;
          info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
-            (png_uint_32)(info_ptr->max_text * png_sizeof (png_text)));
+            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
          if (info_ptr->text == NULL)
            return(1);
 #ifdef PNG_FREE_ME_SUPPORTED
@@ -784,8 +789,8 @@
    }
    for (i = 0; i < num_text; i++)
    {
-      png_size_t text_length,key_len;
-      png_size_t lang_len,lang_key_len;
+      png_size_t text_length, key_len;
+      png_size_t lang_len, lang_key_len;
       png_textp textp = &(info_ptr->text[info_ptr->num_text]);
 
       if (text_ptr[i].key == NULL)
@@ -793,7 +798,7 @@
 
       key_len = png_strlen(text_ptr[i].key);
 
-      if(text_ptr[i].compression <= 0)
+      if (text_ptr[i].compression <= 0)
       {
         lang_len = 0;
         lang_key_len = 0;
@@ -822,7 +827,7 @@
       {
          text_length = 0;
 #ifdef PNG_iTXt_SUPPORTED
-         if(text_ptr[i].compression > 0)
+         if (text_ptr[i].compression > 0)
             textp->compression = PNG_ITXT_COMPRESSION_NONE;
          else
 #endif
@@ -835,25 +840,27 @@
       }
 
       textp->key = (png_charp)png_malloc_warn(png_ptr,
-         (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
+         (png_uint_32)
+         (key_len + text_length + lang_len + lang_key_len + 4));
       if (textp->key == NULL)
         return(1);
       png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
-         (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
+         (png_uint_32)
+         (key_len + lang_len + lang_key_len + text_length + 4),
          (int)textp->key);
 
       png_memcpy(textp->key, text_ptr[i].key,
          (png_size_t)(key_len));
-      *(textp->key+key_len) = '\0';
+      *(textp->key + key_len) = '\0';
 #ifdef PNG_iTXt_SUPPORTED
       if (text_ptr[i].compression > 0)
       {
          textp->lang=textp->key + key_len + 1;
          png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
-         *(textp->lang+lang_len) = '\0';
+         *(textp->lang + lang_len) = '\0';
          textp->lang_key=textp->lang + lang_len + 1;
          png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
-         *(textp->lang_key+lang_key_len) = '\0';
+         *(textp->lang_key + lang_key_len) = '\0';
          textp->text=textp->lang_key + lang_key_len + 1;
       }
       else
@@ -865,13 +872,13 @@
 #endif
          textp->text=textp->key + key_len + 1;
       }
-      if(text_length)
+      if (text_length)
          png_memcpy(textp->text, text_ptr[i].text,
             (png_size_t)(text_length));
-      *(textp->text+text_length) = '\0';
+      *(textp->text + text_length) = '\0';
 
 #ifdef PNG_iTXt_SUPPORTED
-      if(textp->compression > 0)
+      if (textp->compression > 0)
       {
          textp->text_length = 0;
          textp->itxt_length = text_length;
@@ -900,7 +907,7 @@
        (png_ptr->mode & PNG_WROTE_tIME))
       return;
 
-   png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof (png_time));
+   png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
    info_ptr->valid |= PNG_INFO_tIME;
 }
 #endif
@@ -914,8 +921,6 @@
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
-
    if (trans != NULL)
    {
        /*
@@ -924,6 +929,10 @@
         * function used to do the allocation.
         */
 
+#ifdef PNG_FREE_ME_SUPPORTED
+       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
+#endif
+
        /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
        png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
            (png_uint_32)PNG_MAX_PALETTE_LENGTH);
@@ -965,6 +974,13 @@
 void PNGAPI
 png_set_sPLT(png_structp png_ptr,
              png_infop info_ptr, png_sPLT_tp entries, int nentries)
+/*
+ *  entries        - array of png_sPLT_t structures
+ *                   to be added to the list of palettes
+ *                   in the info structure.
+ *  nentries       - number of palette structures to be
+ *                   added.
+ */
 {
     png_sPLT_tp np;
     int i;
@@ -973,7 +989,8 @@
        return;
 
     np = (png_sPLT_tp)png_malloc_warn(png_ptr,
-        (info_ptr->splt_palettes_num + nentries) * png_sizeof(png_sPLT_t));
+        (info_ptr->splt_palettes_num + nentries) *
+        (png_uint_32)png_sizeof(png_sPLT_t));
     if (np == NULL)
     {
       png_warning(png_ptr, "No memory for sPLT palettes.");
@@ -1001,12 +1018,12 @@
         }
         png_memcpy(to->name, from->name, length);
         to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
-            from->nentries * png_sizeof(png_sPLT_entry));
+            (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
         if (to->entries == NULL)
         {
            png_warning(png_ptr,
              "Out of memory while processing sPLT chunk");
-           png_free(png_ptr,to->name);
+           png_free(png_ptr, to->name);
            to->name = NULL;
            continue;
         }
@@ -1037,8 +1054,8 @@
         return;
 
     np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
-        (info_ptr->unknown_chunks_num + num_unknowns) *
-        png_sizeof(png_unknown_chunk));
+        (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
+        png_sizeof(png_unknown_chunk)));
     if (np == NULL)
     {
        png_warning(png_ptr,
@@ -1068,12 +1085,13 @@
           to->data=NULL;
        else
        {
-          to->data = (png_bytep)png_malloc_warn(png_ptr, from->size);
+          to->data = (png_bytep)png_malloc_warn(png_ptr,
+            (png_uint_32)from->size);
           if (to->data == NULL)
           {
              png_warning(png_ptr,
               "Out of memory while processing unknown chunk.");
-             to->size=0;
+             to->size = 0;
           }
           else
              png_memcpy(to->data, from->data, from->size);
@@ -1090,7 +1108,7 @@
 png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
    int chunk, int location)
 {
-   if(png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
+   if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
          (int)info_ptr->unknown_chunks_num)
       info_ptr->unknown_chunks[chunk].location = (png_byte)location;
 }
@@ -1138,12 +1156,12 @@
        return;
     if (num_chunks == 0)
     {
-      if(keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
+      if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
         png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
       else
         png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
 
-      if(keep == PNG_HANDLE_CHUNK_ALWAYS)
+      if (keep == PNG_HANDLE_CHUNK_ALWAYS)
         png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
       else
         png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
@@ -1153,19 +1171,20 @@
       return;
     old_num_chunks=png_ptr->num_chunk_list;
     new_list=(png_bytep)png_malloc(png_ptr,
-       (png_uint_32)(5*(num_chunks+old_num_chunks)));
-    if(png_ptr->chunk_list != NULL)
+       (png_uint_32)
+       (5*(num_chunks + old_num_chunks)));
+    if (png_ptr->chunk_list != NULL)
     {
        png_memcpy(new_list, png_ptr->chunk_list,
           (png_size_t)(5*old_num_chunks));
        png_free(png_ptr, png_ptr->chunk_list);
        png_ptr->chunk_list=NULL;
     }
-    png_memcpy(new_list+5*old_num_chunks, chunk_list,
+    png_memcpy(new_list + 5*old_num_chunks, chunk_list,
        (png_size_t)(5*num_chunks));
-    for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
+    for (p=new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
        *p=(png_byte)keep;
-    png_ptr->num_chunk_list=old_num_chunks+num_chunks;
+    png_ptr->num_chunk_list=old_num_chunks + num_chunks;
     png_ptr->chunk_list=new_list;
 #ifdef PNG_FREE_ME_SUPPORTED
     png_ptr->free_me |= PNG_FREE_LIST;
@@ -1195,17 +1214,18 @@
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
+   if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
       png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
    info_ptr->row_pointers = row_pointers;
-   if(row_pointers)
+   if (row_pointers)
       info_ptr->valid |= PNG_INFO_IDAT;
 }
 #endif
 
 #ifdef PNG_WRITE_SUPPORTED
 void PNGAPI
-png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
+png_set_compression_buffer_size(png_structp png_ptr,
+    png_uint_32 size)
 {
     if (png_ptr == NULL)
        return;
@@ -1258,7 +1278,7 @@
      * rejected by png_set_IHDR().  To accept any PNG datastream
      * regardless of dimensions, set both limits to 0x7ffffffL.
      */
-    if(png_ptr == NULL) return;
+    if (png_ptr == NULL) return;
     png_ptr->user_width_max = user_width_max;
     png_ptr->user_height_max = user_height_max;
 }
diff --git a/pngtest.c b/pngtest.c
index 8c00064..5990141 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.2.27 - [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -37,7 +37,7 @@
 #  include <windows.h>
 #  include <stdlib.h>
 #  define READFILE(file, data, length, check) \
-     if (ReadFile(file, data, length, &check,NULL)) check = 0
+     if (ReadFile(file, data, length, &check, NULL)) check = 0
 #  define WRITEFILE(file, data, length, check)) \
      if (WriteFile(file, data, length, &check, NULL)) check = 0
 #  define FCLOSE(file) CloseHandle(file)
@@ -45,9 +45,9 @@
 #  include <stdio.h>
 #  include <stdlib.h>
 #  define READFILE(file, data, length, check) \
-     check=(png_size_t)fread(data,(png_size_t)1,length,file)
+     check=(png_size_t)fread(data, (png_size_t)1, length, file)
 #  define WRITEFILE(file, data, length, check) \
-     check=(png_size_t)fwrite(data,(png_size_t)1, length, file)
+     check=(png_size_t)fwrite(data, (png_size_t)1, length, file)
 #  define FCLOSE(file) fclose(file)
 #endif
 
@@ -83,7 +83,7 @@
 
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
 #define PNG_tIME_STRING_LENGTH 30
-static int tIME_chunk_present=0;
+static int tIME_chunk_present = 0;
 static char tIME_string[PNG_tIME_STRING_LENGTH] = "no tIME chunk present in file";
 #endif
 
@@ -99,11 +99,6 @@
 /*  #define STDERR stderr  */
 #define STDERR stdout   /* for DOS */
 
-/* example of using row callbacks to make a simple progress meter */
-static int status_pass=1;
-static int status_dots_requested=0;
-static int status_dots=1;
-
 /* In case a system header (e.g., on AIX) defined jmpbuf */
 #ifdef jmpbuf
 #  undef jmpbuf
@@ -114,6 +109,11 @@
 #  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
 #endif
 
+/* example of using row callbacks to make a simple progress meter */
+static int status_pass = 1;
+static int status_dots_requested = 0;
+static int status_dots = 1;
+
 void
 #ifdef PNG_1_0_X
 PNGAPI
@@ -125,15 +125,15 @@
 #endif
 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
-    if(png_ptr == NULL || row_number > PNG_UINT_31_MAX) return;
-    if(status_pass != pass)
+    if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) return;
+    if (status_pass != pass)
     {
-       fprintf(stdout,"\n Pass %d: ",pass);
+       fprintf(stdout, "\n Pass %d: ", pass);
        status_pass = pass;
        status_dots = 31;
     }
     status_dots--;
-    if(status_dots == 0)
+    if (status_dots == 0)
     {
        fprintf(stdout, "\n         ");
        status_dots=30;
@@ -152,7 +152,7 @@
 #endif
 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
-    if(png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return;
+    if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) return;
     fprintf(stdout, "w");
 }
 
@@ -173,8 +173,8 @@
 #endif
 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
-    if(png_ptr != NULL && row_info != NULL)
-      ++filters_used[*(data-1)];
+    if (png_ptr != NULL && row_info != NULL)
+      ++filters_used[*(data - 1)];
 }
 #endif
 
@@ -196,7 +196,7 @@
 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
    png_bytep dp = data;
-   if(png_ptr == NULL)return;
+   if (png_ptr == NULL)return;
 
    /* contents of row_info:
     *  png_uint_32 width      width of row
@@ -210,44 +210,44 @@
 
     /* counts the number of zero samples (or zero pixels if color_type is 3 */
 
-    if(row_info->color_type == 0 || row_info->color_type == 3)
+    if (row_info->color_type == 0 || row_info->color_type == 3)
     {
-       int pos=0;
+       int pos = 0;
        png_uint_32 n, nstop;
-       for (n=0, nstop=row_info->width; n<nstop; n++)
+       for (n = 0, nstop=row_info->width; n<nstop; n++)
        {
-          if(row_info->bit_depth == 1)
+          if (row_info->bit_depth == 1)
           {
-             if(((*dp << pos++ ) & 0x80) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << pos++ ) & 0x80) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 2)
+          if (row_info->bit_depth == 2)
           {
-             if(((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=2)) & 0xc0) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 4)
+          if (row_info->bit_depth == 4)
           {
-             if(((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=4)) & 0xf0) == 0) zero_samples++;
+             if (pos == 8)
              {
                 pos = 0;
                 dp++;
              }
           }
-          if(row_info->bit_depth == 8)
-             if(*dp++ == 0) zero_samples++;
-          if(row_info->bit_depth == 16)
+          if (row_info->bit_depth == 8)
+             if (*dp++ == 0) zero_samples++;
+          if (row_info->bit_depth == 16)
           {
-             if((*dp | *(dp+1)) == 0) zero_samples++;
+             if ((*dp | *(dp+1)) == 0) zero_samples++;
              dp+=2;
           }
        }
@@ -257,24 +257,24 @@
        png_uint_32 n, nstop;
        int channel;
        int color_channels = row_info->channels;
-       if(row_info->color_type > 3)color_channels--;
+       if (row_info->color_type > 3)color_channels--;
 
-       for (n=0, nstop=row_info->width; n<nstop; n++)
+       for (n = 0, nstop=row_info->width; n<nstop; n++)
        {
           for (channel = 0; channel < color_channels; channel++)
           {
-             if(row_info->bit_depth == 8)
-                if(*dp++ == 0) zero_samples++;
-             if(row_info->bit_depth == 16)
+             if (row_info->bit_depth == 8)
+                if (*dp++ == 0) zero_samples++;
+             if (row_info->bit_depth == 16)
              {
-                if((*dp | *(dp+1)) == 0) zero_samples++;
+                if ((*dp | *(dp+1)) == 0) zero_samples++;
                 dp+=2;
              }
           }
-          if(row_info->color_type > 3)
+          if (row_info->color_type > 3)
           {
              dp++;
-             if(row_info->bit_depth == 16)dp++;
+             if (row_info->bit_depth == 16)dp++;
           }
        }
     }
@@ -342,7 +342,7 @@
          read = MIN(NEAR_BUF_SIZE, remaining);
          READFILE(io_ptr, buf, 1, err);
          png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-         if(err != read)
+         if (err != read)
             break;
          else
             check += err;
@@ -436,8 +436,6 @@
    }
 }
 #endif /* USE_FAR_KEYWORD */
-#endif /* PNG_NO_STDIO */
-/* END of code to validate stdio-free compilation */
 
 /* This function is called when there is a warning, but the library thinks
  * it can continue anyway.  Replacement functions don't have to do anything
@@ -465,6 +463,8 @@
    /* We can return because png_error calls the default handler, which is
     * actually OK in this case. */
 }
+#endif /* PNG_NO_STDIO */
+/* END of code to validate stdio-free compilation */
 
 /* START of code to validate memory allocation and deallocation */
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
@@ -511,7 +511,7 @@
       memory_infop pinfo;
       png_set_mem_fn(png_ptr, NULL, NULL, NULL);
       pinfo = (memory_infop)png_malloc(png_ptr,
-         (png_uint_32)png_sizeof (*pinfo));
+         (png_uint_32)png_sizeof(*pinfo));
       pinfo->size = size;
       current_allocation += size;
       total_allocation += size;
@@ -520,8 +520,9 @@
          maximum_allocation = current_allocation;
       pinfo->pointer = (png_voidp)png_malloc(png_ptr, size);
       /* Restore malloc_fn and free_fn */
-      png_set_mem_fn(png_ptr, png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
-         (png_free_ptr)png_debug_free);
+      png_set_mem_fn(png_ptr,
+          png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
+          (png_free_ptr)png_debug_free);
       if (size != 0 && pinfo->pointer == NULL)
       {
          current_allocation -= size;
@@ -533,9 +534,9 @@
       pinformation = pinfo;
       /* Make sure the caller isn't assuming zeroed memory. */
       png_memset(pinfo->pointer, 0xdd, pinfo->size);
-      if(verbose)
-         printf("png_malloc %lu bytes at %x\n",(unsigned long)size,
-          pinfo->pointer);
+      if (verbose)
+         printf("png_malloc %lu bytes at %x\n", (unsigned long)size,
+            pinfo->pointer);
       return (png_voidp)(pinfo->pointer);
    }
 }
@@ -583,14 +584,81 @@
    }
 
    /* Finally free the data. */
-   if(verbose)
-      printf("Freeing %x\n",ptr);
+   if (verbose)
+      printf("Freeing %x\n", ptr);
    png_free_default(png_ptr, ptr);
    ptr=NULL;
 }
 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
 /* END of code to test memory allocation/deallocation */
 
+
+/* Demonstration of user chunk support of the sTER and vpAg chunks */
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+
+/* (sTER is a public chunk not yet understood by libpng.  vpAg is a private
+chunk used in ImageMagick to store "virtual page" size).  */
+
+static png_uint_32 user_chunk_data[4];
+
+    /* 0: sTER mode + 1
+     * 1: vpAg width
+     * 2: vpAg height
+     * 3: vpAg units
+     */
+
+static int read_user_chunk_callback(png_struct *png_ptr,
+   png_unknown_chunkp chunk)
+{
+  png_uint_32
+    *user_chunk_data;
+
+  /* Return one of the following: */
+     /* return (-n);  chunk had an error */
+     /* return (0);  did not recognize */
+     /* return (n);  success */
+
+  /* The unknown chunk structure contains the chunk data:
+   * png_byte name[5];
+   * png_byte *data;
+   * png_size_t size;
+   *
+   *  Note that libpng has already taken care of the CRC handling.
+   */
+
+  if (chunk->name[0] == 115 && chunk->name[1] ==  84 &&     /* s  T */
+      chunk->name[2] ==  69 && chunk->name[3] ==  82)       /* E  R */
+     {
+       /* Found sTER chunk */
+       if (chunk->size != 1)
+         return (-1); /* Error return */
+       if (chunk->data[0] != 0 && chunk->data[0] != 1)
+          return (-1);  /* Invalid mode */
+       user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+       user_chunk_data[0]=chunk->data[0]+1;
+       return (1);
+     }
+  if (chunk->name[0] != 118 || chunk->name[1] != 112 ||    /* v  p */
+      chunk->name[2] !=  65 || chunk->name[3] != 103)      /* A  g */
+    return (0); /* Did not recognize */
+
+  /* Found ImageMagick vpAg chunk */
+
+  if (chunk->size != 9)
+    return (-1); /* Error return */
+
+  user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+
+  user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
+  user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
+  user_chunk_data[3]=(png_uint_32)chunk->data[8];
+
+  return (1);
+
+}
+#endif
+/* END of code to demonstrate user chunk support */
+
 /* Test one file */
 int
 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
@@ -651,27 +719,45 @@
 
    png_debug(0, "Allocating read and write structures\n");
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
-   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   read_ptr =
+      png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   read_ptr =
+      png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
+#if defined(PNG_NO_STDIO)
    png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
        pngtest_warning);
+#endif
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+  user_chunk_data[0] = 0;
+  user_chunk_data[1] = 0;
+  user_chunk_data[2] = 0;
+  user_chunk_data[3] = 0;
+  png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
+    read_user_chunk_callback);
+
+#endif
 #ifdef PNG_WRITE_SUPPORTED
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
-   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   write_ptr =
+      png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+   write_ptr =
+      png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
       png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
+#if defined(PNG_NO_STDIO)
    png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
        pngtest_warning);
 #endif
+#endif
    png_debug(0, "Allocating read_info, write_info and end_info structures\n");
    read_info_ptr = png_create_info_struct(read_ptr);
    end_info_ptr = png_create_info_struct(read_ptr);
@@ -689,7 +775,8 @@
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
-      png_free(read_ptr, row_buf);
+      if (row_buf)
+         png_free(read_ptr, row_buf);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 #ifdef PNG_WRITE_SUPPORTED
       png_destroy_info_struct(write_ptr, &write_end_info_ptr);
@@ -700,7 +787,7 @@
       return (1);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_jmpbuf(read_ptr),jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(read_ptr), jmpbuf, png_sizeof(jmp_buf));
 #endif
 
 #ifdef PNG_WRITE_SUPPORTED
@@ -722,7 +809,7 @@
       return (1);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_jmpbuf(write_ptr),jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(write_ptr), jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 #endif
@@ -744,7 +831,7 @@
 #    endif
 #  endif
 #endif
-   if(status_dots_requested == 1)
+   if (status_dots_requested == 1)
    {
 #ifdef PNG_WRITE_SUPPORTED
       png_set_write_status_fn(write_ptr, write_row_callback);
@@ -762,13 +849,13 @@
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
    {
      int i;
-     for(i=0; i<256; i++)
-        filters_used[i]=0;
+     for (i = 0; i<256; i++)
+        filters_used[i] = 0;
      png_set_read_user_transform_fn(read_ptr, count_filters);
    }
 #endif
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-   zero_samples=0;
+   zero_samples = 0;
    png_set_write_user_transform_fn(write_ptr, count_zero_samples);
 #endif
 
@@ -913,7 +1000,8 @@
       png_int_32 offset_x, offset_y;
       int unit_type;
 
-      if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
+      if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
+         &unit_type))
       {
          png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
       }
@@ -1006,9 +1094,9 @@
             pointed to by png_convert_to_rfc1123() gets free'ed before
             we use it */
          png_memcpy(tIME_string,
-                    png_convert_to_rfc1123(read_ptr, mod_time), 
+                    png_convert_to_rfc1123(read_ptr, mod_time),
                     png_sizeof(tIME_string));
-         tIME_string[png_sizeof(tIME_string)-1] = '\0';
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
@@ -1063,6 +1151,40 @@
    png_write_info_before_PLTE(write_ptr, write_info_ptr);
  */
    png_write_info(write_ptr, write_info_ptr);
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+   if (user_chunk_data[0] != 0)
+   {
+     png_byte png_sTER[5] = {115,  84,  69,  82, '\0'};
+
+     unsigned char
+       ster_chunk_data[1];
+
+     if (verbose)
+        fprintf(STDERR, "stereo mode = %lu\n",
+          (unsigned long)(user_chunk_data[0] - 1));
+     ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
+     png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
+   }
+   if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
+   {
+     png_byte png_vpAg[5] = {118, 112,  65, 103, '\0'};
+
+     unsigned char
+       vpag_chunk_data[9];
+
+     if (verbose)
+        fprintf(STDERR, "vpAg = %lu x %lu, units=%lu\n",
+          (unsigned long)user_chunk_data[1],
+          (unsigned long)user_chunk_data[2],
+          (unsigned long)user_chunk_data[3]);
+     png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
+     png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
+     vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
+     png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
+   }
+
+#endif
 #endif
 
 #ifdef SINGLE_ROWBUF_ALLOC
@@ -1080,7 +1202,7 @@
    png_set_interlace_handling(write_ptr);
 #  endif
 #else
-   num_pass=1;
+   num_pass = 1;
 #endif
 
 #ifdef PNGTEST_TIMING
@@ -1090,11 +1212,11 @@
 #endif
    for (pass = 0; pass < num_pass; pass++)
    {
-      png_debug1(0, "Writing row data for pass %d\n",pass);
+      png_debug1(0, "Writing row data for pass %d\n", pass);
       for (y = 0; y < height; y++)
       {
 #ifndef SINGLE_ROWBUF_ALLOC
-         png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass,y);
+         png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass, y);
          row_buf = (png_bytep)png_malloc(read_ptr,
             png_get_rowbytes(read_ptr, read_info_ptr));
          png_debug2(0, "0x%08lx (%ld bytes)\n", (unsigned long)row_buf,
@@ -1159,7 +1281,7 @@
          png_memcpy(tIME_string,
                     png_convert_to_rfc1123(read_ptr, mod_time),
                     png_sizeof(tIME_string));
-         tIME_string[png_sizeof(tIME_string)-1] = '\0';
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
@@ -1190,7 +1312,7 @@
 #endif
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
-   if(verbose)
+   if (verbose)
    {
       png_uint_32 iwidth, iheight;
       iwidth = png_get_image_width(write_ptr, write_info_ptr);
@@ -1243,28 +1365,28 @@
       return (1);
    }
 
-   for(;;)
+   for (;;)
    {
       png_size_t num_in, num_out;
 
-      READFILE(fpin, inbuf, 1, num_in);
-      READFILE(fpout, outbuf, 1, num_out);
+         READFILE(fpin, inbuf, 1, num_in);
+         READFILE(fpout, outbuf, 1, num_out);
 
       if (num_in != num_out)
       {
          fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
                  inname, outname);
-         if(wrote_question == 0)
+         if (wrote_question == 0)
          {
             fprintf(STDERR,
          "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
-              inname,PNG_ZBUF_SIZE);
+              inname, PNG_ZBUF_SIZE);
             fprintf(STDERR,
               "\n   filtering heuristic (libpng default), compression");
             fprintf(STDERR,
               " level (zlib default),\n   and zlib version (%s)?\n\n",
               ZLIB_VERSION);
-            wrote_question=1;
+            wrote_question = 1;
          }
          FCLOSE(fpin);
          FCLOSE(fpout);
@@ -1277,17 +1399,17 @@
       if (png_memcmp(inbuf, outbuf, num_in))
       {
          fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
-         if(wrote_question == 0)
+         if (wrote_question == 0)
          {
             fprintf(STDERR,
          "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
-                 inname,PNG_ZBUF_SIZE);
+                 inname, PNG_ZBUF_SIZE);
             fprintf(STDERR,
               "\n   filtering heuristic (libpng default), compression");
             fprintf(STDERR,
               " level (zlib default),\n   and zlib version (%s)?\n\n",
               ZLIB_VERSION);
-            wrote_question=1;
+            wrote_question = 1;
          }
          FCLOSE(fpin);
          FCLOSE(fpout);
@@ -1318,15 +1440,15 @@
 
    fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
    fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
-   fprintf(STDERR,"%s",png_get_copyright(NULL));
+   fprintf(STDERR, "%s", png_get_copyright(NULL));
    /* Show the version of libpng used in building the library */
-   fprintf(STDERR," library (%lu):%s",
+   fprintf(STDERR, " library (%lu):%s",
       (unsigned long)png_access_version_number(),
       png_get_header_version(NULL));
    /* Show the version of libpng used in building the application */
-   fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
+   fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
       PNG_HEADER_VERSION_STRING);
-   fprintf(STDERR," png_sizeof(png_struct)=%ld, png_sizeof(png_info)=%ld\n",
+   fprintf(STDERR, " sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
                     (long)png_sizeof(png_struct), (long)png_sizeof(png_info));
 
    /* Do some consistency checking on the memory allocation settings, I'm
@@ -1377,10 +1499,10 @@
       }
    }
 
-   if (!multiple && argc == 3+verbose)
-     outname = argv[2+verbose];
+   if (!multiple && argc == 3 + verbose)
+     outname = argv[2 + verbose];
 
-   if ((!multiple && argc > 3+verbose) || (multiple && argc < 2))
+   if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
    {
      fprintf(STDERR,
        "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
@@ -1404,7 +1526,7 @@
          int k;
 #endif
          int kerror;
-         fprintf(STDERR, "Testing %s:",argv[i]);
+         fprintf(STDERR, "Testing %s:", argv[i]);
          kerror = test_one_file(argv[i], outname);
          if (kerror == 0)
          {
@@ -1415,14 +1537,14 @@
             fprintf(STDERR, " PASS\n");
 #endif
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
-            for (k=0; k<256; k++)
-               if(filters_used[k])
+            for (k = 0; k<256; k++)
+               if (filters_used[k])
                   fprintf(STDERR, " Filter %d was used %lu times\n",
-                     k,(unsigned long)filters_used[k]);
+                     k, (unsigned long)filters_used[k]);
 #endif
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-         if(tIME_chunk_present != 0)
-            fprintf(STDERR, " tIME = %s\n",tIME_string);
+         if (tIME_chunk_present != 0)
+            fprintf(STDERR, " tIME = %s\n", tIME_string);
          tIME_chunk_present = 0;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
          }
@@ -1434,7 +1556,7 @@
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          if (allocation_now != current_allocation)
             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
-               current_allocation-allocation_now);
+               current_allocation - allocation_now);
          if (current_allocation != 0)
          {
             memory_infop pinfo = pinformation;
@@ -1443,7 +1565,8 @@
                current_allocation);
             while (pinfo != NULL)
             {
-               fprintf(STDERR, " %lu bytes at %x\n", (unsigned long)pinfo->size,
+               fprintf(STDERR, " %lu bytes at %x\n",
+                 (unsigned long)pinfo->size,
                  (unsigned int) pinfo->pointer);
                pinfo = pinfo->next;
             }
@@ -1464,20 +1587,20 @@
    else
    {
       int i;
-      for (i=0; i<3; ++i)
+      for (i = 0; i<3; ++i)
       {
          int kerror;
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          int allocation_now = current_allocation;
 #endif
          if (i == 1) status_dots_requested = 1;
-         else if(verbose == 0)status_dots_requested = 0;
+         else if (verbose == 0)status_dots_requested = 0;
          if (i == 0 || verbose == 1 || ierror != 0)
-            fprintf(STDERR, "Testing %s:",inname);
+            fprintf(STDERR, "Testing %s:", inname);
          kerror = test_one_file(inname, outname);
-         if(kerror == 0)
+         if (kerror == 0)
          {
-            if(verbose == 1 || i == 2)
+            if (verbose == 1 || i == 2)
             {
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
                 int k;
@@ -1489,28 +1612,29 @@
                 fprintf(STDERR, " PASS\n");
 #endif
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
-                for (k=0; k<256; k++)
-                   if(filters_used[k])
+                for (k = 0; k<256; k++)
+                   if (filters_used[k])
                       fprintf(STDERR, " Filter %d was used %lu times\n",
-                         k,(unsigned long)filters_used[k]);
+                         k,
+                         (unsigned long)filters_used[k]);
 #endif
 #if defined(PNG_TIME_RFC1123_SUPPORTED)
-             if(tIME_chunk_present != 0)
-                fprintf(STDERR, " tIME = %s\n",tIME_string);
+             if (tIME_chunk_present != 0)
+                fprintf(STDERR, " tIME = %s\n", tIME_string);
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
             }
          }
          else
          {
-            if(verbose == 0 && i != 2)
-               fprintf(STDERR, "Testing %s:",inname);
+            if (verbose == 0 && i != 2)
+               fprintf(STDERR, "Testing %s:", inname);
             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }
 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
          if (allocation_now != current_allocation)
              fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
-               current_allocation-allocation_now);
+               current_allocation - allocation_now);
          if (current_allocation != 0)
          {
              memory_infop pinfo = pinformation;
@@ -1519,7 +1643,7 @@
                 current_allocation);
              while (pinfo != NULL)
              {
-                fprintf(STDERR," %lu bytes at %x\n",
+                fprintf(STDERR, " %lu bytes at %x\n",
                    (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
                 pinfo = pinfo->next;
              }
@@ -1542,13 +1666,13 @@
    t_stop = (float)clock();
    t_misc += (t_stop - t_start);
    t_start = t_stop;
-   fprintf(STDERR," CPU time used = %.3f seconds",
+   fprintf(STDERR, " CPU time used = %.3f seconds",
       (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR," (decoding %.3f,\n",
+   fprintf(STDERR, " (decoding %.3f,\n",
       t_decode/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR,"        encoding %.3f ,",
+   fprintf(STDERR, "        encoding %.3f ,",
       t_encode/(float)CLOCKS_PER_SEC);
-   fprintf(STDERR," other %.3f seconds)\n\n",
+   fprintf(STDERR, " other %.3f seconds)\n\n",
       t_misc/(float)CLOCKS_PER_SEC);
 #endif
 
@@ -1560,4 +1684,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_37 your_png_h_is_not_version_1_0_37;
+typedef version_1_0_38rc01 your_png_h_is_not_version_1_0_38rc01;
diff --git a/pngtrans.c b/pngtrans.c
index 1640095..230c6f9 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,24 +1,24 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.2.17 May 15, 2007
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
 /* turn on BGR-to-RGB mapping */
 void PNGAPI
 png_set_bgr(png_structp png_ptr)
 {
    png_debug(1, "in png_set_bgr\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_BGR;
 }
 #endif
@@ -29,7 +29,7 @@
 png_set_swap(png_structp png_ptr)
 {
    png_debug(1, "in png_set_swap\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth == 16)
       png_ptr->transformations |= PNG_SWAP_BYTES;
 }
@@ -41,7 +41,7 @@
 png_set_packing(png_structp png_ptr)
 {
    png_debug(1, "in png_set_packing\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth < 8)
    {
       png_ptr->transformations |= PNG_PACK;
@@ -56,7 +56,7 @@
 png_set_packswap(png_structp png_ptr)
 {
    png_debug(1, "in png_set_packswap\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (png_ptr->bit_depth < 8)
       png_ptr->transformations |= PNG_PACKSWAP;
 }
@@ -67,7 +67,7 @@
 png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 {
    png_debug(1, "in png_set_shift\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_SHIFT;
    png_ptr->shift = *true_bits;
 }
@@ -99,7 +99,7 @@
 png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
    png_debug(1, "in png_set_filler\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_FILLER;
    png_ptr->filler = (png_byte)filler;
    if (filler_loc == PNG_FILLER_AFTER)
@@ -132,7 +132,7 @@
 png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
    png_debug(1, "in png_set_add_alpha\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_set_filler(png_ptr, filler, filler_loc);
    png_ptr->transformations |= PNG_ADD_ALPHA;
 }
@@ -146,7 +146,7 @@
 png_set_swap_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_swap_alpha\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_SWAP_ALPHA;
 }
 #endif
@@ -157,7 +157,7 @@
 png_set_invert_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_invert_alpha\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_INVERT_ALPHA;
 }
 #endif
@@ -167,7 +167,7 @@
 png_set_invert_mono(png_structp png_ptr)
 {
    png_debug(1, "in png_set_invert_mono\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->transformations |= PNG_INVERT_MONO;
 }
 
@@ -631,13 +631,13 @@
    user_transform_ptr, int user_transform_depth, int user_transform_channels)
 {
    png_debug(1, "in png_set_user_transform_info\n");
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    png_ptr->user_transform_ptr = user_transform_ptr;
    png_ptr->user_transform_depth = (png_byte)user_transform_depth;
    png_ptr->user_transform_channels = (png_byte)user_transform_channels;
 #else
-   if(user_transform_ptr || user_transform_depth || user_transform_channels)
+   if (user_transform_ptr || user_transform_depth || user_transform_channels)
       png_warning(png_ptr,
         "This version of libpng does not support user transform info");
 #endif
@@ -652,8 +652,8 @@
 png_voidp PNGAPI
 png_get_user_transform_ptr(png_structp png_ptr)
 {
-#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    if (png_ptr == NULL) return (NULL);
+#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    return ((png_voidp)png_ptr->user_transform_ptr);
 #else
    return (NULL);
diff --git a/pngwio.c b/pngwio.c
index 371a4fa..d8b97ba 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,9 +1,9 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.2.13 November 13, 2006
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2006 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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.)
  *
@@ -45,7 +45,7 @@
 {
    png_uint_32 check;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if defined(_WIN32_WCE)
    if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
       check = 0;
@@ -71,7 +71,7 @@
    png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */
    png_FILE_p io_ptr;
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    /* Check if data really is near. If so, use usual code. */
    near_data = (png_byte *)CVT_PTR_NOCHECK(data);
    io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
@@ -134,7 +134,7 @@
 #if !defined(_WIN32_WCE)
    png_FILE_p io_ptr;
 #endif
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if !defined(_WIN32_WCE)
    io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
    if (io_ptr != NULL)
@@ -170,7 +170,7 @@
 png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_ptr->io_ptr = io_ptr;
 
 #if !defined(PNG_NO_STDIO)
@@ -206,27 +206,27 @@
 
 #if defined(USE_FAR_KEYWORD)
 #if defined(_MSC_VER)
-void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
+void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
 {
    void *near_ptr;
    void FAR *far_ptr;
    FP_OFF(near_ptr) = FP_OFF(ptr);
    far_ptr = (void FAR *)near_ptr;
-   if(check != 0)
-      if(FP_SEG(ptr) != FP_SEG(far_ptr))
-         png_error(png_ptr,"segment lost in conversion");
+   if (check != 0)
+      if (FP_SEG(ptr) != FP_SEG(far_ptr))
+         png_error(png_ptr, "segment lost in conversion");
    return(near_ptr);
 }
 #  else
-void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
+void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
 {
    void *near_ptr;
    void FAR *far_ptr;
    near_ptr = (void FAR *)ptr;
    far_ptr = (void FAR *)near_ptr;
-   if(check != 0)
-      if(far_ptr != ptr)
-         png_error(png_ptr,"segment lost in conversion");
+   if (check != 0)
+      if (far_ptr != ptr)
+         png_error(png_ptr, "segment lost in conversion");
    return(near_ptr);
 }
 #   endif
diff --git a/pngwrite.c b/pngwrite.c
index 7d02ad7..2074a7e 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -32,9 +32,9 @@
    {
    png_write_sig(png_ptr); /* write PNG signature */
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
+   if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
    {
-      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
+      png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
       png_ptr->mng_features_permitted=0;
    }
 #endif
@@ -393,6 +393,13 @@
 
    /* write end of PNG file */
    png_write_IEND(png_ptr);
+   /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03,
+    * and restored again in libpng-1.2.30, may cause some applications that
+    * do not set png_ptr->output_flush_fn to crash.  If your application
+    * experiences this problem, please report the event to
+    * png-mng-implement at lists.sf.net .
+    */
+   png_flush(png_ptr);
 }
 
 #if defined(PNG_WRITE_tIME_SUPPORTED)
@@ -475,7 +482,7 @@
       return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #endif
 #endif
 
@@ -484,12 +491,12 @@
 #endif /* PNG_USER_MEM_SUPPORTED */
    png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
 
-   if(user_png_ver)
+   if (user_png_ver)
    {
      i=0;
      do
      {
-       if(user_png_ver[i] != png_libpng_ver[i])
+       if (user_png_ver[i] != png_libpng_ver[i])
           png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
      } while (png_libpng_ver[i++]);
    }
@@ -547,7 +554,7 @@
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
       PNG_ABORT();
-   png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, jmpbuf, png_sizeof(jmp_buf));
 #else
    if (setjmp(png_ptr->jmpbuf))
       PNG_ABORT();
@@ -572,9 +579,9 @@
    png_size_t png_struct_size, png_size_t png_info_size)
 {
    /* We only come here via pre-1.0.12-compiled applications */
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
-   if(png_sizeof(png_struct) > png_struct_size ||
+   if (png_sizeof(png_struct) > png_struct_size ||
       png_sizeof(png_info) > png_info_size)
    {
       char msg[80];
@@ -592,7 +599,7 @@
       png_warning(png_ptr, msg);
    }
 #endif
-   if(png_sizeof(png_struct) > png_struct_size)
+   if (png_sizeof(png_struct) > png_struct_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -601,7 +608,7 @@
        png_error(png_ptr,
        "The png struct allocated by the application for writing is too small.");
      }
-   if(png_sizeof(png_info) > png_info_size)
+   if (png_sizeof(png_info) > png_info_size)
      {
        png_ptr->error_fn=NULL;
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
@@ -638,7 +645,7 @@
 #else
        png_ptr->warning_fn=NULL;
        png_warning(png_ptr,
-     "Application uses deprecated png_write_init() and should be recompiled.");
+ "Application uses deprecated png_write_init() and should be recompiled.");
        break;
 #endif
      }
@@ -648,7 +655,7 @@
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    if (png_sizeof(png_struct) > png_struct_size)
@@ -659,7 +666,7 @@
      }
 
    /* reset all variables to 0 */
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    /* added at libpng-1.2.6 */
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
@@ -669,7 +676,7 @@
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 
    png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
@@ -903,7 +910,7 @@
     * 4. The filter_method is 64 and
     * 5. The color_type is RGB or RGBA
     */
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
    {
       /* Intrapixel differencing */
@@ -1076,7 +1083,7 @@
    /* free our memory.  png_free checks NULL for us. */
    png_free(png_ptr, png_ptr->zbuf);
    png_free(png_ptr, png_ptr->row_buf);
-#ifndef PNG_NO_WRITE_FILTERING
+#ifndef PNG_NO_WRITE_FILTER
    png_free(png_ptr, png_ptr->prev_row);
    png_free(png_ptr, png_ptr->sub_row);
    png_free(png_ptr, png_ptr->up_row);
@@ -1098,7 +1105,7 @@
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* reset structure */
-   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
+   png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
 #endif
 
    error_fn = png_ptr->error_fn;
@@ -1108,7 +1115,7 @@
    free_fn = png_ptr->free_fn;
 #endif
 
-   png_memset(png_ptr, 0, png_sizeof (png_struct));
+   png_memset(png_ptr, 0, png_sizeof(png_struct));
 
    png_ptr->error_fn = error_fn;
    png_ptr->warning_fn = warning_fn;
@@ -1118,7 +1125,7 @@
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
-   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
+   png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
 #endif
 }
 
@@ -1130,7 +1137,7 @@
    if (png_ptr == NULL)
       return;
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
-   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+   if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
       (method == PNG_INTRAPIXEL_DIFFERENCING))
          method = PNG_FILTER_TYPE_BASE;
 #endif
diff --git a/pngwtran.c b/pngwtran.c
index 0372fe6..e9374dc 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -25,7 +25,7 @@
 
 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
    if (png_ptr->transformations & PNG_USER_TRANSFORM)
-      if(png_ptr->write_user_transform_fn != NULL)
+      if (png_ptr->write_user_transform_fn != NULL)
         (*(png_ptr->write_user_transform_fn)) /* user write transform function */
           (png_ptr,                    /* png_ptr */
            &(png_ptr->row_info),       /* row_info:     */
@@ -558,8 +558,8 @@
             png_uint_32 s0   = (*(rp  ) << 8) | *(rp+1);
             png_uint_32 s1   = (*(rp+2) << 8) | *(rp+3);
             png_uint_32 s2   = (*(rp+4) << 8) | *(rp+5);
-            png_uint_32 red  = (png_uint_32)((s0-s1) & 0xffffL);
-            png_uint_32 blue = (png_uint_32)((s2-s1) & 0xffffL);
+            png_uint_32 red  = (png_uint_32)((s0 - s1) & 0xffffL);
+            png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
             *(rp  ) = (png_byte)((red >> 8) & 0xff);
             *(rp+1) = (png_byte)(red & 0xff);
             *(rp+4) = (png_byte)((blue >> 8) & 0xff);
diff --git a/pngwutil.c b/pngwutil.c
index 0774080..bf2a42d 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.27 [April 29, 2008]
+ * Last changed in libpng 1.2.30 [July 17, 2008]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -49,6 +49,24 @@
    buf[1] = (png_byte)(i & 0xff);
 }
 
+/* Simple function to write the signature.  If we have already written
+ * the magic bytes of the signature, or more likely, the PNG stream is
+ * being embedded into another stream and doesn't need its own signature,
+ * we should call png_set_sig_bytes() to tell libpng how many of the
+ * bytes have already been written.
+ */
+void /* PRIVATE */
+png_write_sig(png_structp png_ptr)
+{
+   png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+
+   /* write the rest of the 8 byte signature */
+   png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
+      (png_size_t)(8 - png_ptr->sig_bytes));
+   if (png_ptr->sig_bytes < 3)
+      png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
+}
+
 /* Write a PNG chunk all at once.  The type is an array of ASCII characters
  * representing the chunk name.  The array must be at least 4 bytes in
  * length, and does not need to be null terminated.  To be safe, pass the
@@ -62,9 +80,9 @@
 png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
    png_bytep data, png_size_t length)
 {
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
-   png_write_chunk_data(png_ptr, data, length);
+   png_write_chunk_data(png_ptr, data, (png_size_t)length);
    png_write_chunk_end(png_ptr);
 }
 
@@ -76,16 +94,18 @@
 png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
    png_uint_32 length)
 {
-   png_byte buf[4];
-   png_debug2(0, "Writing %s chunk (%lu bytes)\n", chunk_name, length);
-   if(png_ptr == NULL) return;
+   png_byte buf[8];
 
-   /* write the length */
+   png_debug2(0, "Writing %s chunk, length = %lu\n", chunk_name,
+      (unsigned long)length);
+   if (png_ptr == NULL) return;
+
+   /* write the length and the chunk name */
    png_save_uint_32(buf, length);
-   png_write_data(png_ptr, buf, (png_size_t)4);
-
-   /* write the chunk name */
-   png_write_data(png_ptr, chunk_name, (png_size_t)4);
+   png_memcpy(buf + 4, chunk_name, 4);
+   png_write_data(png_ptr, buf, (png_size_t)8);
+   /* put the chunk name into png_ptr->chunk_name */
+   png_memcpy(png_ptr->chunk_name, chunk_name, 4);
    /* reset the crc and run it over the chunk name */
    png_reset_crc(png_ptr);
    png_calculate_crc(png_ptr, chunk_name, (png_size_t)4);
@@ -100,11 +120,14 @@
 png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    /* write the data, and run the CRC over it */
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
    if (data != NULL && length > 0)
    {
-      png_calculate_crc(png_ptr, data, length);
       png_write_data(png_ptr, data, length);
+      /* update the CRC after writing the data,
+       * in case that the user I/O routine alters it.
+       */
+      png_calculate_crc(png_ptr, data, length);
    }
 }
 
@@ -114,31 +137,14 @@
 {
    png_byte buf[4];
 
-   if(png_ptr == NULL) return;
+   if (png_ptr == NULL) return;
 
-   /* write the crc */
+   /* write the crc in a single operation */
    png_save_uint_32(buf, png_ptr->crc);
 
    png_write_data(png_ptr, buf, (png_size_t)4);
 }
 
-/* Simple function to write the signature.  If we have already written
- * the magic bytes of the signature, or more likely, the PNG stream is
- * being embedded into another stream and doesn't need its own signature,
- * we should call png_set_sig_bytes() to tell libpng how many of the
- * bytes have already been written.
- */
-void /* PRIVATE */
-png_write_sig(png_structp png_ptr)
-{
-   png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-   /* write the rest of the 8 byte signature */
-   png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
-      (png_size_t)8 - png_ptr->sig_bytes);
-   if(png_ptr->sig_bytes < 3)
-      png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
-}
-
 #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED)
 /*
  * This pair of functions encapsulates the operation of (a) compressing a
@@ -239,20 +245,21 @@
 
                old_ptr = comp->output_ptr;
                comp->output_ptr = (png_charpp)png_malloc(png_ptr,
-                  (png_uint_32)(comp->max_output_ptr *
-                  png_sizeof (png_charpp)));
+                  (png_uint_32)
+                  (comp->max_output_ptr * png_sizeof(png_charpp)));
                png_memcpy(comp->output_ptr, old_ptr, old_max
-                  * png_sizeof (png_charp));
+                  * png_sizeof(png_charp));
                png_free(png_ptr, old_ptr);
             }
             else
                comp->output_ptr = (png_charpp)png_malloc(png_ptr,
-                  (png_uint_32)(comp->max_output_ptr *
-                  png_sizeof (png_charp)));
+                  (png_uint_32)
+                  (comp->max_output_ptr * png_sizeof(png_charp)));
          }
 
          /* save the data */
-         comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr,
+         comp->output_ptr[comp->num_output_ptr] =
+            (png_charp)png_malloc(png_ptr,
             (png_uint_32)png_ptr->zbuf_size);
          png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
             png_ptr->zbuf_size);
@@ -291,20 +298,21 @@
                   /* This could be optimized to realloc() */
                   comp->output_ptr = (png_charpp)png_malloc(png_ptr,
                      (png_uint_32)(comp->max_output_ptr *
-                     png_sizeof (png_charpp)));
+                     png_sizeof(png_charp)));
                   png_memcpy(comp->output_ptr, old_ptr,
-                     old_max * png_sizeof (png_charp));
+                     old_max * png_sizeof(png_charp));
                   png_free(png_ptr, old_ptr);
                }
                else
                   comp->output_ptr = (png_charpp)png_malloc(png_ptr,
                      (png_uint_32)(comp->max_output_ptr *
-                     png_sizeof (png_charp)));
+                     png_sizeof(png_charp)));
             }
 
             /* save off the data */
             comp->output_ptr[comp->num_output_ptr] =
-               (png_charp)png_malloc(png_ptr, (png_uint_32)png_ptr->zbuf_size);
+               (png_charp)png_malloc(png_ptr,
+               (png_uint_32)png_ptr->zbuf_size);
             png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
                png_ptr->zbuf_size);
             comp->num_output_ptr++;
@@ -349,8 +357,8 @@
    /* write saved output buffers, if any */
    for (i = 0; i < comp->num_output_ptr; i++)
    {
-      png_write_chunk_data(png_ptr,(png_bytep)comp->output_ptr[i],
-         png_ptr->zbuf_size);
+      png_write_chunk_data(png_ptr, (png_bytep)comp->output_ptr[i],
+         (png_size_t)png_ptr->zbuf_size);
       png_free(png_ptr, comp->output_ptr[i]);
       comp->output_ptr[i]=NULL;
    }
@@ -360,7 +368,7 @@
    /* write anything left in zbuf */
    if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
       png_write_chunk_data(png_ptr, png_ptr->zbuf,
-         png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+         (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
 
    /* reset zlib for another zTXt/iTXt or image data */
    deflateReset(&png_ptr->zstream);
@@ -396,7 +404,7 @@
             case 4:
             case 8:
             case 16: png_ptr->channels = 1; break;
-            default: png_error(png_ptr,"Invalid bit depth for grayscale image");
+            default: png_error(png_ptr, "Invalid bit depth for grayscale image");
          }
          break;
       case PNG_COLOR_TYPE_RGB:
@@ -496,7 +504,7 @@
    buf[12] = (png_byte)interlace_type;
 
    /* write the chunk */
-   png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
+   png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
 
    /* initialize zlib with PNG info */
    png_ptr->zstream.zalloc = png_zalloc;
@@ -589,7 +597,8 @@
    png_ptr->num_palette = (png_uint_16)num_pal;
    png_debug1(3, "num_palette = %d\n", png_ptr->num_palette);
 
-   png_write_chunk_start(png_ptr, png_PLTE, num_pal * 3);
+   png_write_chunk_start(png_ptr, (png_bytep)png_PLTE,
+     (png_uint_32)(num_pal * 3));
 #ifndef PNG_NO_POINTER_INDEXING
    for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
    {
@@ -661,7 +670,7 @@
             "Invalid zlib compression method or flags in IDAT");
    }
 
-   png_write_chunk(png_ptr, png_IDAT, data, length);
+   png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
    png_ptr->mode |= PNG_HAVE_IDAT;
 }
 
@@ -673,7 +682,7 @@
    PNG_IEND;
 #endif
    png_debug(1, "in png_write_IEND\n");
-   png_write_chunk(png_ptr, png_IEND, png_bytep_NULL,
+   png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
      (png_size_t)0);
    png_ptr->mode |= PNG_HAVE_IEND;
 }
@@ -694,7 +703,7 @@
    /* file_gamma is saved in 1/100,000ths */
    igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
    png_save_uint_32(buf, igamma);
-   png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
+   png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
 }
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
@@ -709,7 +718,7 @@
    png_debug(1, "in png_write_gAMA\n");
    /* file_gamma is saved in 1/100,000ths */
    png_save_uint_32(buf, (png_uint_32)file_gamma);
-   png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
+   png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
 }
 #endif
 #endif
@@ -725,11 +734,11 @@
    png_byte buf[1];
 
    png_debug(1, "in png_write_sRGB\n");
-   if(srgb_intent >= PNG_sRGB_INTENT_LAST)
+   if (srgb_intent >= PNG_sRGB_INTENT_LAST)
          png_warning(png_ptr,
             "Invalid sRGB rendering intent specified");
    buf[0]=(png_byte)srgb_intent;
-   png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
+   png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
 }
 #endif
 
@@ -770,34 +779,35 @@
 
    if (profile_len > 3)
       embedded_profile_len =
-          ((*( (png_bytep)profile  ))<<24) |
-          ((*( (png_bytep)profile+1))<<16) |
-          ((*( (png_bytep)profile+2))<< 8) |
-          ((*( (png_bytep)profile+3))    );
+          ((*( (png_bytep)profile    ))<<24) |
+          ((*( (png_bytep)profile + 1))<<16) |
+          ((*( (png_bytep)profile + 2))<< 8) |
+          ((*( (png_bytep)profile + 3))    );
 
    if (profile_len < embedded_profile_len)
-     {
-        png_warning(png_ptr,
-          "Embedded profile length too large in iCCP chunk");
-        return;
-     }
+   {
+      png_warning(png_ptr,
+        "Embedded profile length too large in iCCP chunk");
+      return;
+   }
 
    if (profile_len > embedded_profile_len)
-     {
-        png_warning(png_ptr,
-          "Truncating profile to actual length in iCCP chunk");
-        profile_len = embedded_profile_len;
-     }
+   {
+      png_warning(png_ptr,
+        "Truncating profile to actual length in iCCP chunk");
+      profile_len = embedded_profile_len;
+   }
 
    if (profile_len)
-       profile_len = png_text_compress(png_ptr, profile, (png_size_t)profile_len,
-          PNG_COMPRESSION_TYPE_BASE, &comp);
+      profile_len = png_text_compress(png_ptr, profile,
+        (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
 
    /* make sure we include the NULL after the name and the compression type */
-   png_write_chunk_start(png_ptr, png_iCCP,
-          (png_uint_32)name_len+profile_len+2);
-   new_name[name_len+1]=0x00;
-   png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 2);
+   png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
+          (png_uint_32)(name_len + profile_len + 2));
+   new_name[name_len + 1] = 0x00;
+   png_write_chunk_data(png_ptr, (png_bytep)new_name,
+     (png_size_t)(name_len + 2));
 
    if (profile_len)
       png_write_compressed_data_out(png_ptr, &comp);
@@ -834,54 +844,55 @@
    }
 
    /* make sure we include the NULL after the name */
-   png_write_chunk_start(png_ptr, png_sPLT,
-          (png_uint_32)(name_len + 2 + palette_size));
-   png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1);
-   png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1);
+   png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
+     (png_uint_32)(name_len + 2 + palette_size));
+   png_write_chunk_data(png_ptr, (png_bytep)new_name,
+     (png_size_t)(name_len + 1));
+   png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1);
 
    /* loop through each palette entry, writing appropriately */
 #ifndef PNG_NO_POINTER_INDEXING
-   for (ep = spalette->entries; ep<spalette->entries+spalette->nentries; ep++)
+   for (ep = spalette->entries; ep<spalette->entries + spalette->nentries; ep++)
    {
-       if (spalette->depth == 8)
-       {
-           entrybuf[0] = (png_byte)ep->red;
-           entrybuf[1] = (png_byte)ep->green;
-           entrybuf[2] = (png_byte)ep->blue;
-           entrybuf[3] = (png_byte)ep->alpha;
-           png_save_uint_16(entrybuf + 4, ep->frequency);
-       }
-       else
-       {
-           png_save_uint_16(entrybuf + 0, ep->red);
-           png_save_uint_16(entrybuf + 2, ep->green);
-           png_save_uint_16(entrybuf + 4, ep->blue);
-           png_save_uint_16(entrybuf + 6, ep->alpha);
-           png_save_uint_16(entrybuf + 8, ep->frequency);
-       }
-       png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
+      if (spalette->depth == 8)
+      {
+          entrybuf[0] = (png_byte)ep->red;
+          entrybuf[1] = (png_byte)ep->green;
+          entrybuf[2] = (png_byte)ep->blue;
+          entrybuf[3] = (png_byte)ep->alpha;
+          png_save_uint_16(entrybuf + 4, ep->frequency);
+      }
+      else
+      {
+          png_save_uint_16(entrybuf + 0, ep->red);
+          png_save_uint_16(entrybuf + 2, ep->green);
+          png_save_uint_16(entrybuf + 4, ep->blue);
+          png_save_uint_16(entrybuf + 6, ep->alpha);
+          png_save_uint_16(entrybuf + 8, ep->frequency);
+      }
+      png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
    }
 #else
    ep=spalette->entries;
    for (i=0; i>spalette->nentries; i++)
    {
-       if (spalette->depth == 8)
-       {
-           entrybuf[0] = (png_byte)ep[i].red;
-           entrybuf[1] = (png_byte)ep[i].green;
-           entrybuf[2] = (png_byte)ep[i].blue;
-           entrybuf[3] = (png_byte)ep[i].alpha;
-           png_save_uint_16(entrybuf + 4, ep[i].frequency);
-       }
-       else
-       {
-           png_save_uint_16(entrybuf + 0, ep[i].red);
-           png_save_uint_16(entrybuf + 2, ep[i].green);
-           png_save_uint_16(entrybuf + 4, ep[i].blue);
-           png_save_uint_16(entrybuf + 6, ep[i].alpha);
-           png_save_uint_16(entrybuf + 8, ep[i].frequency);
-       }
-       png_write_chunk_data(png_ptr, entrybuf, entry_size);
+      if (spalette->depth == 8)
+      {
+          entrybuf[0] = (png_byte)ep[i].red;
+          entrybuf[1] = (png_byte)ep[i].green;
+          entrybuf[2] = (png_byte)ep[i].blue;
+          entrybuf[3] = (png_byte)ep[i].alpha;
+          png_save_uint_16(entrybuf + 4, ep[i].frequency);
+      }
+      else
+      {
+          png_save_uint_16(entrybuf + 0, ep[i].red);
+          png_save_uint_16(entrybuf + 2, ep[i].green);
+          png_save_uint_16(entrybuf + 4, ep[i].blue);
+          png_save_uint_16(entrybuf + 6, ep[i].alpha);
+          png_save_uint_16(entrybuf + 8, ep[i].frequency);
+      }
+      png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
    }
 #endif
 
@@ -942,7 +953,7 @@
       buf[size++] = sbit->alpha;
    }
 
-   png_write_chunk(png_ptr, png_sBIT, buf, size);
+   png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
 }
 #endif
 
@@ -967,7 +978,7 @@
    {
       png_warning(png_ptr, "Invalid cHRM white point specified");
 #if !defined(PNG_NO_CONSOLE_IO)
-      fprintf(stderr,"white_x=%f, white_y=%f\n",white_x, white_y);
+      fprintf(stderr, "white_x=%f, white_y=%f\n", white_x, white_y);
 #endif
       return;
    }
@@ -1006,7 +1017,7 @@
    itemp = (png_uint_32)(blue_y * 100000.0 + 0.5);
    png_save_uint_32(buf + 28, itemp);
 
-   png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
+   png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
 }
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
@@ -1027,7 +1038,8 @@
    {
       png_warning(png_ptr, "Invalid fixed cHRM white point specified");
 #if !defined(PNG_NO_CONSOLE_IO)
-      fprintf(stderr,"white_x=%ld, white_y=%ld\n",white_x, white_y);
+      fprintf(stderr, "white_x=%ld, white_y=%ld\n", (unsigned long)white_x,
+        (unsigned long)white_y);
 #endif
       return;
    }
@@ -1058,7 +1070,7 @@
    png_save_uint_32(buf + 24, (png_uint_32)blue_x);
    png_save_uint_32(buf + 28, (png_uint_32)blue_y);
 
-   png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
+   png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
 }
 #endif
 #endif
@@ -1079,23 +1091,24 @@
    {
       if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
       {
-         png_warning(png_ptr,"Invalid number of transparent colors specified");
+         png_warning(png_ptr, "Invalid number of transparent colors specified");
          return;
       }
       /* write the chunk out as it is */
-      png_write_chunk(png_ptr, png_tRNS, trans, (png_size_t)num_trans);
+      png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans,
+        (png_size_t)num_trans);
    }
    else if (color_type == PNG_COLOR_TYPE_GRAY)
    {
       /* one 16 bit value */
-      if(tran->gray >= (1 << png_ptr->bit_depth))
+      if (tran->gray >= (1 << png_ptr->bit_depth))
       {
          png_warning(png_ptr,
            "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
          return;
       }
       png_save_uint_16(buf, tran->gray);
-      png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
+      png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
    }
    else if (color_type == PNG_COLOR_TYPE_RGB)
    {
@@ -1103,13 +1116,13 @@
       png_save_uint_16(buf, tran->red);
       png_save_uint_16(buf + 2, tran->green);
       png_save_uint_16(buf + 4, tran->blue);
-      if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
-         {
-            png_warning(png_ptr,
-              "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
-            return;
-         }
-      png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
+      if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+      {
+         png_warning(png_ptr,
+           "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
+         return;
+      }
+      png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
    }
    else
    {
@@ -1142,31 +1155,31 @@
          return;
       }
       buf[0] = back->index;
-      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
+      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
    }
    else if (color_type & PNG_COLOR_MASK_COLOR)
    {
       png_save_uint_16(buf, back->red);
       png_save_uint_16(buf + 2, back->green);
       png_save_uint_16(buf + 4, back->blue);
-      if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
-         {
-            png_warning(png_ptr,
-              "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
-            return;
-         }
-      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
+      if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+      {
+         png_warning(png_ptr,
+           "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
+         return;
+      }
+      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
    }
    else
    {
-      if(back->gray >= (1 << png_ptr->bit_depth))
+      if (back->gray >= (1 << png_ptr->bit_depth))
       {
          png_warning(png_ptr,
            "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
          return;
       }
       png_save_uint_16(buf, back->gray);
-      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
+      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
    }
 }
 #endif
@@ -1191,7 +1204,8 @@
       return;
    }
 
-   png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
+   png_write_chunk_start(png_ptr, (png_bytep)png_hIST,
+     (png_uint_32)(num_hist * 2));
    for (i = 0; i < num_hist; i++)
    {
       png_save_uint_16(buf, hist[i]);
@@ -1311,7 +1325,7 @@
       }
    }
    *dp = '\0';
-   if(kwarn)
+   if (kwarn)
       png_warning(png_ptr, "extra interior spaces removed from keyword");
 
    if (key_len == 0)
@@ -1357,16 +1371,18 @@
       text_len = png_strlen(text);
 
    /* make sure we include the 0 after the key */
-   png_write_chunk_start(png_ptr, png_tEXt, (png_uint_32)key_len+text_len+1);
+   png_write_chunk_start(png_ptr, (png_bytep)png_tEXt,
+      (png_uint_32)(key_len + text_len + 1));
    /*
     * We leave it to the application to meet PNG-1.0 requirements on the
     * contents of the text.  PNG-1.0 through PNG-1.2 discourage the use of
     * any non-Latin-1 characters except for NEWLINE.  ISO PNG will forbid them.
     * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
     */
-   png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
+   png_write_chunk_data(png_ptr, (png_bytep)new_key,
+     (png_size_t)(key_len + 1));
    if (text_len)
-      png_write_chunk_data(png_ptr, (png_bytep)text, text_len);
+      png_write_chunk_data(png_ptr, (png_bytep)text, (png_size_t)text_len);
 
    png_write_chunk_end(png_ptr);
    png_free(png_ptr, new_key);
@@ -1398,6 +1414,7 @@
    if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
    {
       png_warning(png_ptr, "Empty keyword in zTXt chunk");
+      png_free(png_ptr, new_key);
       return;
    }
 
@@ -1415,10 +1432,11 @@
        &comp);
 
    /* write start of chunk */
-   png_write_chunk_start(png_ptr, png_zTXt, (png_uint_32)
-      (key_len+text_len+2));
+   png_write_chunk_start(png_ptr, (png_bytep)png_zTXt,
+     (png_uint_32)(key_len+text_len + 2));
    /* write key */
-   png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
+   png_write_chunk_data(png_ptr, (png_bytep)new_key,
+     (png_size_t)(key_len + 1));
    png_free(png_ptr, new_key);
 
    buf[0] = (png_byte)compression;
@@ -1483,7 +1501,7 @@
    /* make sure we include the compression flag, the compression byte,
     * and the NULs after the key, lang, and lang_key parts */
 
-   png_write_chunk_start(png_ptr, png_iTXt,
+   png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
           (png_uint_32)(
         5 /* comp byte, comp flag, terminators for key, lang and lang_key */
         + key_len
@@ -1497,7 +1515,8 @@
     * any non-Latin-1 characters except for NEWLINE.  ISO PNG will forbid them.
     * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
     */
-   png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
+   png_write_chunk_data(png_ptr, (png_bytep)new_key,
+     (png_size_t)(key_len + 1));
 
    /* set the compression flag */
    if (compression == PNG_ITXT_COMPRESSION_NONE || \
@@ -1507,11 +1526,13 @@
        cbuf[0] = 1;
    /* set the compression method */
    cbuf[1] = 0;
-   png_write_chunk_data(png_ptr, cbuf, 2);
+   png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
 
    cbuf[0] = 0;
-   png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf), lang_len + 1);
-   png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf), lang_key_len + 1);
+   png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf),
+     (png_size_t)(lang_len + 1));
+   png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf),
+     (png_size_t)(lang_key_len + 1));
    png_write_compressed_data_out(png_ptr, &comp);
 
    png_write_chunk_end(png_ptr);
@@ -1539,7 +1560,7 @@
    png_save_int_32(buf + 4, y_offset);
    buf[8] = (png_byte)unit_type;
 
-   png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
+   png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
 }
 #endif
 #if defined(PNG_WRITE_pCAL_SUPPORTED)
@@ -1567,21 +1588,23 @@
    png_debug1(3, "pCAL units length = %d\n", (int)units_len);
    total_len = purpose_len + units_len + 10;
 
-   params_len = (png_uint_32p)png_malloc(png_ptr, (png_uint_32)(nparams
-      *png_sizeof(png_uint_32)));
+   params_len = (png_uint_32p)png_malloc(png_ptr,
+      (png_uint_32)(nparams * png_sizeof(png_uint_32)));
 
    /* Find the length of each parameter, making sure we don't count the
       null terminator for the last parameter. */
    for (i = 0; i < nparams; i++)
    {
       params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1);
-      png_debug2(3, "pCAL parameter %d length = %lu\n", i, params_len[i]);
+      png_debug2(3, "pCAL parameter %d length = %lu\n", i,
+        (unsigned long) params_len[i]);
       total_len += (png_size_t)params_len[i];
    }
 
    png_debug1(3, "pCAL total length = %d\n", (int)total_len);
-   png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
-   png_write_chunk_data(png_ptr, (png_bytep)new_purpose, purpose_len);
+   png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
+   png_write_chunk_data(png_ptr, (png_bytep)new_purpose,
+     (png_size_t)purpose_len);
    png_save_int_32(buf, X0);
    png_save_int_32(buf + 4, X1);
    buf[8] = (png_byte)type;
@@ -1640,7 +1663,7 @@
 #endif
 
    png_debug1(3, "sCAL total length = %u\n", (unsigned int)total_len);
-   png_write_chunk(png_ptr, png_sCAL, (png_bytep)buf, total_len);
+   png_write_chunk(png_ptr, (png_bytep)png_sCAL, (png_bytep)buf, total_len);
 }
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
@@ -1670,7 +1693,7 @@
    png_memcpy(buf + wlen + 2, height, hlen);  /* do NOT append the '\0' here */
 
    png_debug1(3, "sCAL total length = %u\n", (unsigned int)total_len);
-   png_write_chunk(png_ptr, png_sCAL, buf, total_len);
+   png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
 }
 #endif
 #endif
@@ -1696,7 +1719,7 @@
    png_save_uint_32(buf + 4, y_pixels_per_unit);
    buf[8] = (png_byte)unit_type;
 
-   png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
+   png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9);
 }
 #endif
 
@@ -1728,7 +1751,7 @@
    buf[5] = mod_time->minute;
    buf[6] = mod_time->second;
 
-   png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
+   png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7);
 }
 #endif
 
@@ -1758,18 +1781,19 @@
 
    png_debug(1, "in png_write_start_row\n");
    buf_size = (png_size_t)(PNG_ROWBYTES(
-      png_ptr->usr_channels*png_ptr->usr_bit_depth,png_ptr->width)+1);
+      png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
 
    /* set up row buffer */
-   png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
+   png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
+     (png_uint_32)buf_size);
    png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
 
-#ifndef PNG_NO_WRITE_FILTERING
+#ifndef PNG_NO_WRITE_FILTER
    /* set up filtering buffer, if using this filter */
    if (png_ptr->do_filter & PNG_FILTER_SUB)
    {
       png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
-         (png_ptr->rowbytes + 1));
+         (png_uint_32)(png_ptr->rowbytes + 1));
       png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
    }
 
@@ -1777,30 +1801,31 @@
    if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
    {
      /* set up previous row buffer */
-      png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
+      png_ptr->prev_row = (png_bytep)png_malloc(png_ptr,
+        (png_uint_32)buf_size);
       png_memset(png_ptr->prev_row, 0, buf_size);
 
       if (png_ptr->do_filter & PNG_FILTER_UP)
       {
          png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
-            (png_ptr->rowbytes + 1));
+           (png_uint_32)(png_ptr->rowbytes + 1));
          png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
       }
 
       if (png_ptr->do_filter & PNG_FILTER_AVG)
       {
          png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
-            (png_ptr->rowbytes + 1));
+           (png_uint_32)(png_ptr->rowbytes + 1));
          png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
       }
 
       if (png_ptr->do_filter & PNG_FILTER_PAETH)
       {
          png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
-            (png_ptr->rowbytes + 1));
+           (png_uint_32)(png_ptr->rowbytes + 1));
          png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
       }
-#endif /* PNG_NO_WRITE_FILTERING */
+#endif /* PNG_NO_WRITE_FILTER */
    }
 
 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
@@ -1899,7 +1924,7 @@
          if (png_ptr->prev_row != NULL)
             png_memset(png_ptr->prev_row, 0,
                (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
-               png_ptr->usr_bit_depth,png_ptr->width))+1);
+               png_ptr->usr_bit_depth, png_ptr->width)) + 1);
          return;
       }
    }
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index b56676d..935a201 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -6,7 +6,7 @@
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 0)
-set(PNGLIB_RELEASE 37)
+set(PNGLIB_RELEASE 38)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -169,7 +169,7 @@
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.0.37
+#    VERSION 0.${PNGLIB_RELEASE}.1.0.38rc01
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 86505a8..b63096e 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.0.37
+version=1.0.38rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng-config.in b/scripts/libpng-config.in
index f227ee5..2f475be 100755
--- a/scripts/libpng-config.in
+++ b/scripts/libpng-config.in
@@ -14,7 +14,7 @@
 libdir="@libdir@"
 includedir="@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@"
 libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@"
-all_libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ -lz -lm"
+all_libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ @LIBS@"
 I_opts="-I${includedir}"
 L_opts="-L${libdir}"
 R_opts=""
diff --git a/scripts/libpng.pc-configure.in b/scripts/libpng.pc-configure.in
index 8f9ab6a..cadb555 100644
--- a/scripts/libpng.pc-configure.in
+++ b/scripts/libpng.pc-configure.in
@@ -1,10 +1,11 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
-includedir=@includedir@/libpng10
+includedir=@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.37
-Libs: -L${libdir} -lpng10
+Version: @PNGLIB_VERSION@
+Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
+Libs.private: @LIBS@
 Cflags: -I${includedir} @LIBPNG_NO_MMX@
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index cd2ed69..8978211 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.0.37
+Version: 1.0.38rc01
 Libs: -L${libdir} -lpng10
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index 50daa1d..2385e1e 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index 7370acc..64d1410 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index 4a6468d..61ee819 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -20,7 +20,7 @@
 
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index 5b302e2..ccf2d98 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index a4c25db..016825d 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -74,7 +74,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 CYGDLL = 10
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index 0936a81..8d85d24 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -18,8 +18,8 @@
 
 # Library name:
 LIBNAME = libpng10
-PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMAJ = 12
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index f7eb427..f981cbe 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index 6337ad0..d578caa 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index 786f0e3..7a31f41 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -14,7 +14,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index 47b2ad6..b3570b0 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index 7c96dec..21ee3c2 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index bb2ef8e..89cc6be 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 6ba2c52..f8d129e 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index e6ac882..78eed1b 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -74,7 +74,7 @@
 LIBNAME = libpng10
 PNGMAJ = 0
 MINGDLL = 10
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 5e6d80f..bc2aa6c 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -14,7 +14,7 @@
 
 LIB=	png12
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.37
+SHLIB_MINOR=	1.0.38rc01
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index f1e7ecd..f3e426e 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -14,7 +14,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.0.37
+SHLIB_MINOR=	1.0.38rc01
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.nommx b/scripts/makefile.nommx
index 4c0ff51..bda389d 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -7,7 +7,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 497a0d7..a907e9d 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -8,7 +8,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.0.37
+SHLIB_MINOR=	1.0.38rc01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index c90dced..a6ed752 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index b86f4aa..8d6af20 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index 6dc42ee..38a43ab 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index eb8a76e..e00a395 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng10
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index 9575e12..2b6c330 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.solaris-x86 b/scripts/makefile.solaris-x86
index 84e2df3..e5974ff 100644
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng10
 PNGMAJ = 0
-PNGMIN = 1.0.37
+PNGMIN = 1.0.38rc01
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index f700862..f29ec4b 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.0.37
+; Version 1.0.38rc01
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngw32.def b/scripts/pngw32.def
index be00465..21bd7c9 100644
--- a/scripts/pngw32.def
+++ b/scripts/pngw32.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.0.37
+;Version 1.0.38rc01
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3