Imported from libpng-1.4.0beta49.tar
diff --git a/ANNOUNCE b/ANNOUNCE
index 5b5ad59..333e29c 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.4.0beta48 - February 14, 2009
+Libpng 1.4.0beta49 - February 28, 2009
 
 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.
@@ -9,27 +9,27 @@
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.0beta48.tar.gz
-   1.4.0beta48.tar.bz2
+   1.4.0beta49.tar.gz
+   1.4.0beta49.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   1.4.0beta48-no-config.tar.gz
-   1.4.0beta48-no-config.tar.bz2
+   1.4.0beta49-no-config.tar.gz
+   1.4.0beta49-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp140b48.zip
-   lp140b48.tar.bz2
+   lp140b49.zip
+   lp140b49.tar.bz2
 
 Other information:
 
-   1.4.0beta48-README.txt
-   1.4.0beta48-KNOWNBUGS.txt
-   1.4.0beta48-LICENSE.txt
-   1.4.0beta48-Y2K-compliance.txt
+   1.4.0beta49-README.txt
+   1.4.0beta49-KNOWNBUGS.txt
+   1.4.0beta49-LICENSE.txt
+   1.4.0beta49-Y2K-compliance.txt
 
 Changes since the last public release (1.2.10):
 
@@ -343,7 +343,7 @@
   Added check for zero-area RGB cHRM triange in png_check_cHRM() and
     png_check_cHRM_fixed().
 
-version 1.4.0beta39 [February 14, 2009]
+version 1.4.0beta39 [February 28, 2009]
   Revised png_warning() to write its message on standard output by default
     when warning_fn is NULL.
 
@@ -383,6 +383,15 @@
   Combined several instances of png_malloc(); png_memset() into png_calloc().
   Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
 
+version 1.4.0beta49 [February 28, 2009]
+  Added png_fileno() macro to pngconf.h, used in pngwio.c
+  Corrected order of #ifdef's in png_debug definition in png.h
+  Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
+    for pcal_params.
+  Fixed order of #ifdef directives in the png_debug defines in png.h
+    (bug introduced in libpng-1.2.34/1.4.0beta29).
+  Revised comments in png_set_read_fn() and png_set_write_fn().
+
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.
 
diff --git a/CHANGES b/CHANGES
index e9d02c7..28963d3 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2059,6 +2059,15 @@
   Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
     but was never defined.
 
+version 1.4.0beta49 [February 28, 2009]
+  Added png_fileno() macro to pngconf.h, used in pngwio.c
+  Corrected order of #ifdef's in png_debug definition in png.h
+  Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
+    for pcal_params.
+  Fixed order of #ifdef directives in the png_debug defines in png.h
+    (bug introduced in libpng-1.2.34/1.4.0beta29).
+  Revised comments in png_set_read_fn() and png_set_write_fn().
+
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.
 
diff --git a/INSTALL b/INSTALL
index 6ead445..9783d8b 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.4.0beta48 - February 14, 2009
+Installing libpng version 1.4.0beta49 - February 28, 2009
 
 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-1.4.0beta48" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.4.0beta49" 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:
@@ -95,14 +95,14 @@
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng14.so.14.1.4.0beta48)
+                       gcc, creates libpng14.so.14.1.4.0beta49)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng14.so.14.1.4.0beta48)
+                       (gcc, creates libpng14.so.14.1.4.0beta49)
  makefile.gcmmx    =>  Linux/ELF makefile
-                       (gcc, creates libpng14.so.14.1.4.0beta48,
+                       (gcc, creates libpng14.so.14.1.4.0beta49,
                        uses assembler code tuned for Intel MMX platform)
  makefile.nommx    =>  Linux/ELF makefile
-                       (gcc, creates libpng14.so.14.1.4.0beta48
+                       (gcc, creates libpng14.so.14.1.4.0beta49
                        does not use Intel MMX assembler code)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
@@ -125,12 +125,12 @@
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng14.so.14.1.4.0beta48)
+                       creates libpng14.so.14.1.4.0beta49)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng14.so.14.1.4.0beta48)
+                       creates libpng14.so.14.1.4.0beta49)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng14.so.14.1.4.0beta48)
+                       creates libpng14.so.14.1.4.0beta49)
  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 ff52ba1..c75e349 100644
--- a/KNOWNBUG
+++ b/KNOWNBUG
@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.4.0beta48
+Known bugs in libpng version 1.4.0beta49
 
 1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
    reading interlaced PNG files, when assembler code is enabled but running
diff --git a/LICENSE b/LICENSE
index 582c94a..30cc6cd 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 1.4.0beta48, February 14, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.0beta49, February 28, 2009, are
 Copyright (c) 2004, 2006-2007 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
-February 14, 2009
+February 28, 2009
diff --git a/Makefile.am b/Makefile.am
index ad8306e..48a7fb8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,7 +86,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.4.0beta48.txt pngvcrd.c 
+	example.c libpng-1.4.0beta49.txt pngvcrd.c 
 
 CLEANFILES= pngout.png libpng14.pc libpng14-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 0793740..717539f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -331,7 +331,7 @@
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.4.0beta48.txt pngvcrd.c 
+	example.c libpng-1.4.0beta49.txt pngvcrd.c 
 
 CLEANFILES = pngout.png libpng14.pc libpng14-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index 387fb0e..493098b 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.4.0beta48 - February 14, 2009 (shared library 14.0)
+README for libpng version 1.4.0beta49 - February 28, 2009 (shared library 14.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -184,11 +184,11 @@
        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 libpng14.so.14.1.4.0beta48)
+                            gcc, creates libpng14.so.14.1.4.0beta49)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng14.so.14.1.4.0beta48)
+                            (gcc, creates libpng14.so.14.1.4.0beta49)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng14.so.14.1.4.0beta48,
+                            (gcc, creates libpng14.so.14.1.4.0beta49,
                             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
@@ -210,12 +210,12 @@
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng14.so.14.1.4.0beta48)
+                            (gcc, creates libpng14.so.14.1.4.0beta49)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng14.so.14.1.4.0beta48)
+                            (gcc, creates libpng14.so.14.1.4.0beta49)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng14.so.14.1.4.0beta48)
+                            (gcc, creates libpng14.so.14.1.4.0beta49)
        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/configure b/configure
index cfe8c30..84d2541 100755
--- a/configure
+++ b/configure
Binary files differ
diff --git a/configure.ac b/configure.ac
index 06a6c2e..a4aaa02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,12 +18,12 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.4.0beta48], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.4.0beta49], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.4.0beta48
+PNGLIB_VERSION=1.4.0beta49
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=4
 PNGLIB_RELEASE=0
diff --git a/example.c b/example.c
index 1149fe7..cc84ed5 100644
--- a/example.c
+++ b/example.c
@@ -2,7 +2,7 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * This file has been placed in the public domain by the authors.
  * Maintained 1998-2009 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
diff --git a/libpng-1.4.0beta48.txt b/libpng-1.4.0beta49.txt
similarity index 99%
rename from libpng-1.4.0beta48.txt
rename to libpng-1.4.0beta49.txt
index 09729d2..60f64af 100644
--- a/libpng-1.4.0beta48.txt
+++ b/libpng-1.4.0beta49.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.0beta48 - February 14, 2009
+ libpng version 1.4.0beta49 - February 28, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2005 Glenn Randers-Pehrson
@@ -2789,13 +2789,13 @@
 
 IX. Y2K Compliance in libpng
 
-February 14, 2009
+February 28, 2009
 
 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 1.4.0beta48 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.0beta49 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 43f0686..846ad77 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "February 14, 2009"
+.TH LIBPNG 3 "February 28, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta48
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta49
 .SH SYNOPSIS
 \fI\fB
 
@@ -809,7 +809,7 @@
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.0beta48 - February 14, 2009
+ libpng version 1.4.0beta49 - February 28, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2005 Glenn Randers-Pehrson
@@ -3598,13 +3598,13 @@
 
 .SH IX. Y2K Compliance in libpng
 
-February 14, 2009
+February 28, 2009
 
 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 1.4.0beta48 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.0beta49 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
@@ -3772,7 +3772,7 @@
  1.4.0beta9-14       14    10400  14.so.0.0[.0]
  1.2.13              13    10213  12.so.0.13[.0]
  1.4.0beta15-36      14    10400  14.so.0.0[.0]
- 1.4.0beta37-48      14    10400  14.so.14.0[.0]
+ 1.4.0beta37-49      14    10400  14.so.14.0[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -3828,7 +3828,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.4.0beta48 - February 14, 2009:
+Libpng version 1.4.0beta49 - February 28, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3849,7 +3849,7 @@
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.0beta48, February 14, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.0beta49, February 28, 2009, are
 Copyright (c) 2004,2006-2007 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
@@ -3948,7 +3948,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 14, 2009
+February 28, 2009
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 55a6aab..f9a9ada 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "February 14, 2009"
+.TH LIBPNGPF 3 "February 28, 2009"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta48
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta49
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
diff --git a/png.5 b/png.5
index e3e5d80..f3ddac6 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "February 14, 2009"
+.TH PNG 5 "February 28, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 9ed8540..9d59582 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_0beta48 Your_png_h_is_not_version_1_4_0beta48;
+typedef version_1_4_0beta49 Your_png_h_is_not_version_1_4_0beta49;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -641,13 +641,13 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version x 1.4.0beta48 - February 14, 2009" PNG_STRING_NEWLINE \
+     "libpng version x 1.4.0beta49 - February 28, 2009" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.4.0beta48 - February 14, 2009\
+      return ((png_charp) "libpng version 1.4.0beta49 - February 28, 2009\
       Copyright (c) 1998-2009 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
diff --git a/png.h b/png.h
index e5d04e8..ff81c0f 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.4.0beta48 - February 14, 2009
+ * libpng version 1.4.0beta49 - February 28, 2009
  * Copyright (c) 1998-2009 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.)
@@ -9,7 +9,7 @@
  * 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 1.4.0beta48 - February 14, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.4.0beta49 - February 28, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -127,7 +127,7 @@
  *    1.4.0beta9-14           14    10400  14.so.0.0[.0]
  *    1.2.13                  13    10213  12.so.0.10[.0]
  *    1.4.0beta15-36          14    10400  14.so.0.0[.0]
- *    1.4.0beta37-48          14    10400  14.so.14.0[.0]
+ *    1.4.0beta37-49          14    10400  14.so.14.0[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -157,8 +157,8 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.4.0beta48, February 14, 2009, are
- * Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.4.0beta49, February 28, 2009, are
+ * Copyright (c) 2004, 2006-2007 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:
  *
@@ -269,13 +269,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    February 14, 2009
+ *    July 1, 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 1.4.0beta48 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.4.0beta49 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
@@ -331,9 +331,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.4.0beta48"
+#define PNG_LIBPNG_VER_STRING "1.4.0beta49"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.4.0beta48 - February 14, 2009\n"
+   " libpng version 1.4.0beta49 - February 28, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   14
 #define PNG_LIBPNG_VER_DLLNUM  14
@@ -345,7 +345,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  48
+#define PNG_LIBPNG_VER_BUILD  49
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -1038,10 +1038,10 @@
 #define PNG_TRANSFORM_SWAP_ALPHA     0x0100    /* read and write */
 #define PNG_TRANSFORM_SWAP_ENDIAN    0x0200    /* read and write */
 #define PNG_TRANSFORM_INVERT_ALPHA   0x0400    /* read and write */
-#define PNG_TRANSFORM_STRIP_FILLER   0x0800    /* WRITE only, deprecated */
+#define PNG_TRANSFORM_STRIP_FILLER   0x0800    /* WRITE only */
 /* Added to libpng-1.2.34 */
-#define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800  /* WRITE only */
-#define PNG_TRANSFORM_STRIP_FILLER_AFTER  0x1000  /* WRITE only */
+#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER
+#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* WRITE only */
 
 /* Flags for MNG supported features */
 #define PNG_FLAG_MNG_EMPTY_PLTE     0x01
@@ -1356,7 +1356,7 @@
 /* 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_4_0beta48;
+typedef png_structp version_1_4_0beta49;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -1916,17 +1916,20 @@
 
 extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
    png_alloc_size_t size));
+/* Added at libpng version 1.4.0 */
+#ifdef PNG_CALLOC_SUPPORTED
+extern PNG_EXPORT(png_voidp,png_calloc) PNGARG((png_structp png_ptr,
+   png_alloc_size_t size));
+#endif
 
 /* Added at libpng version 1.2.4 */
 extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr,
    png_alloc_size_t size));
 
-/* Added at libpng version 1.4.0; combines malloc(N) and memset(*,0,N). */
-extern PNG_EXPORT(png_voidp,png_calloc) PNGARG((png_structp png_ptr,
-   png_alloc_size_t size));
-
 /* Frees a pointer allocated by png_malloc() */
 extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr));
+extern PNG_EXPORT(void,png_freeptr) PNGARG((png_structp png_ptr,
+   png_voidp *ptr));
 
 /* Free data that was allocated internally */
 extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr,
@@ -2394,64 +2397,72 @@
 #ifndef PNG_DEBUG_FILE
 #define PNG_DEBUG_FILE stderr
 #endif /* PNG_DEBUG_FILE */
+
 #if (PNG_DEBUG > 1)
-#ifndef png_debug
 /* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
  * non-ISO compilers */
-#ifdef __STDC__
-#define png_debug(l,m) \
-{ \
-     int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
-}
-#endif
-#ifndef png_debug1
-#define png_debug1(l,m,p1) \
-{ \
-     int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
-}
-#endif
-#ifndef png_debug2
-#define png_debug2(l,m,p1,p2) \
-{ \
-     int num_tabs=l; \
-     fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
-}
-#endif
-#else /* __STDC __ */
-#ifndef png_debug
-#define png_debug(l,m) \
-     int num_tabs=l; \
-     char format[256]; \
-     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-       m,PNG_STRING_NEWLINE); \
-     fprintf(PNG_DEBUG_FILE,format);
-#endif
-#ifndef png_debug1
-#define png_debug1(l,m,p1) \
-     int num_tabs=l; \
-     char format[256]; \
-     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-       m,PNG_STRING_NEWLINE); \
-     fprintf(PNG_DEBUG_FILE,format,p1);
-#endif
-#ifndef png_debug2
-#define png_debug2(l,m,p1,p2) \
-     int num_tabs=l; \
-     char format[256]; \
-     snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-       (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-       m,PNG_STRING_NEWLINE); \
-     fprintf(PNG_DEBUG_FILE,format,p1,p2);
-#endif
-#endif /* __STDC __ */
+#  ifdef __STDC__
+#    ifndef png_debug
+#      define png_debug(l,m) \
+       { \
+       int num_tabs=l; \
+       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
+       }
+#    endif
+#    ifndef png_debug1
+#      define png_debug1(l,m,p1) \
+       { \
+       int num_tabs=l; \
+       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
+       }
+#    endif
+#    ifndef png_debug2
+#      define png_debug2(l,m,p1,p2) \
+       { \
+       int num_tabs=l; \
+       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
+       }
+#    endif
+#  else /* __STDC __ */
+#    ifndef png_debug
+#      define png_debug(l,m) \
+       { \
+       int num_tabs=l; \
+       char format[256]; \
+       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+         m,PNG_STRING_NEWLINE); \
+       fprintf(PNG_DEBUG_FILE,format); \
+       }
+#    endif
+#    ifndef png_debug1
+#      define png_debug1(l,m,p1) \
+       { \
+       int num_tabs=l; \
+       char format[256]; \
+       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+         m,PNG_STRING_NEWLINE); \
+       fprintf(PNG_DEBUG_FILE,format,p1); \
+       }
+#    endif
+#    ifndef png_debug2
+#      define png_debug2(l,m,p1,p2) \
+       { \
+       int num_tabs=l; \
+       char format[256]; \
+       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+         m,PNG_STRING_NEWLINE); \
+       fprintf(PNG_DEBUG_FILE,format,p1,p2); \
+       }
+#    endif
+#  endif /* __STDC __ */
 #endif /* (PNG_DEBUG > 1) */
+
 #endif /* _MSC_VER */
 #endif /* (PNG_DEBUG > 0) */
 #endif /* PNG_DEBUG */
diff --git a/pngconf.h b/pngconf.h
index ade1f41..e59e64d 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.4.0beta48 - February 14, 2009
+ * libpng version 1.4.0beta49 - February 28, 2009
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -43,6 +43,11 @@
 #include "pngusr.h"
 #endif
 
+/* Added at libpng-1.4.0beta49 for testing */
+#ifndef PNG_NO_CALLOC
+#  define PNG_CALLOC_SUPPORTED
+#endif
+
 /*  
  * If you create a private DLL you need to define in "pngusr.h" the followings:
  * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
@@ -1334,6 +1339,7 @@
 #  define NOCHECK 0
 #  define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
 #  define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
+#  define png_fileno  _fileno     /* Added to v 1.4.0 */
 #  define png_strcpy  _fstrcpy
 #  define png_strncpy _fstrncpy   /* Added to v 1.2.6 */
 #  define png_strlen  _fstrlen
@@ -1345,6 +1351,7 @@
 #  if defined(_WINDOWS_)  /* favor Windows over C runtime fns */
 #    define CVT_PTR(ptr)         (ptr)
 #    define CVT_PTR_NOCHECK(ptr) (ptr)
+#    define png_fileno  fileno
 #    define png_strcpy  lstrcpyA
 #    define png_strncpy lstrcpynA
 #    define png_strlen  lstrlenA
@@ -1355,6 +1362,7 @@
 #  else
 #    define CVT_PTR(ptr)         (ptr)
 #    define CVT_PTR_NOCHECK(ptr) (ptr)
+#    define png_fileno  fileno      /* Added to v 1.4.0 */
 #    define png_strcpy  strcpy
 #    define png_strncpy strncpy     /* Added to v 1.2.6 */
 #    define png_strlen  strlen
diff --git a/pngerror.c b/pngerror.c
index cb0e700..67259b7 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngget.c b/pngget.c
index 5e7f2f0..7428723 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngmem.c b/pngmem.c
index 661c4f8..5d7abf1 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -111,7 +111,7 @@
  * result, we would be truncating potentially larger memory requests
  * (which should cause a fatal error) and introducing major problems.
  */
-
+#ifdef PNG_CALLOC_SUPPORTED
 png_voidp PNGAPI
 png_calloc(png_structp png_ptr, png_alloc_size_t size)
 {
@@ -122,6 +122,7 @@
       png_memset(ret,0,(png_size_t)size);
    return (ret);
 }
+#endif
 
 png_voidp PNGAPI
 png_malloc(png_structp png_ptr, png_alloc_size_t size)
diff --git a/pngpread.c b/pngpread.c
index 432bd2f..b4eee04 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngpriv.h b/pngpriv.h
index f413159..3c0e211 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.4.0beta48 - February 14, 2009
+ * libpng version 1.4.0beta49 - February 28, 2009
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngread.c b/pngread.c
index 7f417f3..6812917 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1377,8 +1377,15 @@
 #endif
    if (info_ptr->row_pointers == NULL)
    {
+#ifdef PNG_CALLOC_SUPPORTED
       info_ptr->row_pointers = (png_bytepp)png_calloc(png_ptr,
          info_ptr->height * png_sizeof(png_bytep));
+#else
+      info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
+         info_ptr->height * png_sizeof(png_bytep));
+      png_memset(info_ptr->row_pointers, 0,
+         info_ptr->height * png_sizeof(png_bytep));
+#endif
 #ifdef PNG_FREE_ME_SUPPORTED
       info_ptr->free_me |= PNG_FREE_ROWS;
 #endif
diff --git a/pngrio.c b/pngrio.c
index 66db861..433fba4 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -116,7 +116,9 @@
                   a location where input data can be stored, and a 32-bit
                   unsigned int that is the number of bytes to be read.
                   To exit and output any fatal error messages the new write
-                  function should call png_error(png_ptr, "Error msg"). */
+                  function should call png_error(png_ptr, "Error msg").
+                  May be NULL, in which case libpng's default function will
+                  be used. */
 void PNGAPI
 png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr read_data_fn)
diff --git a/pngrtran.c b/pngrtran.c
index eae7e3c..808038b 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 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -321,8 +321,14 @@
             png_ptr->palette_to_index[i] = (png_byte)i;
          }
 
+#ifdef PNG_CALLOC_SUPPORTED
          hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 *
             png_sizeof(png_dsortp)));
+#else
+         hash = (png_dsortpp)png_malloc(png_ptr, (png_uint_32)(769 *
+            png_sizeof(png_dsortp)));
+         png_memset(hash, 0, 769 * png_sizeof(png_dsortp));
+#endif
 
          num_new_palette = num_palette;
 
@@ -469,8 +475,15 @@
       int num_blue = (1 << PNG_DITHER_BLUE_BITS);
       png_size_t num_entries = ((png_size_t)1 << total_bits);
 
+#ifdef PNG_CALLOC_SUPPORTED
       png_ptr->palette_lookup = (png_bytep )png_calloc(png_ptr,
          (png_uint_32)(num_entries * png_sizeof(png_byte)));
+#else
+      png_ptr->palette_lookup = (png_bytep )png_malloc(png_ptr,
+         (png_uint_32)(num_entries * png_sizeof(png_byte)));
+      png_memset(png_ptr->palette_lookup, 0, num_entries *
+         png_sizeof(png_byte));
+#endif
 
       distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
          png_sizeof(png_byte)));
@@ -3976,8 +3989,14 @@
      else
         g = 1.0;
 
+#ifdef PNG_CALLOC_SUPPORTED
      png_ptr->gamma_16_table = (png_uint_16pp)png_calloc(png_ptr,
         (png_uint_32)(num * png_sizeof(png_uint_16p)));
+#else
+     png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr,
+        (png_uint_32)(num * png_sizeof(png_uint_16p)));
+     png_memset(png_ptr->gamma_16_table, 0, num * png_sizeof(png_uint_16p)); 
+#endif
 
      if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
      {
@@ -4036,8 +4055,14 @@
 
         g = 1.0 / (png_ptr->gamma);
 
+#ifdef PNG_CALLOC_SUPPORTED
         png_ptr->gamma_16_to_1 = (png_uint_16pp)png_calloc(png_ptr,
            (png_uint_32)(num * png_sizeof(png_uint_16p )));
+#else
+        png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr,
+           (png_uint_32)(num * png_sizeof(png_uint_16p )));
+        png_memset(png_ptr->gamma_16_to_1, 0, num * png_sizeof(png_uint_16p)); 
+#endif
 
         for (i = 0; i < num; i++)
         {
@@ -4059,8 +4084,15 @@
         else
            g = png_ptr->gamma;   /* probably doing rgb_to_gray */
 
+#ifdef PNG_CALLOC_SUPPORTED
         png_ptr->gamma_16_from_1 = (png_uint_16pp)png_calloc(png_ptr,
            (png_uint_32)(num * png_sizeof(png_uint_16p)));
+#else
+        png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr,
+           (png_uint_32)(num * png_sizeof(png_uint_16p)));
+        png_memset(png_ptr->gamma_16_from_1, 0,
+           num * png_sizeof(png_uint_16p)); 
+#endif
 
         for (i = 0; i < num; i++)
         {
diff --git a/pngrutil.c b/pngrutil.c
index 62389bf..9d3b1d3 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngset.c b/pngset.c
index 7576910..21a213b 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -383,7 +383,7 @@
       return;
    }
 
-   png_memset(info_ptr->pcal_params[nparams],0,nparams*png_sizeof(png_charp));
+   png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
 
    for (i = 0; i < nparams; i++)
    {
@@ -518,8 +518,15 @@
    /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
       of num_palette entries,
       in case of an invalid PNG file that has too-large sample values. */
+#ifdef PNG_CALLOC_SUPPORTED
    png_ptr->palette = (png_colorp)png_calloc(png_ptr,
       PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
+#else
+   png_ptr->palette = (png_colorp)png_malloc(png_ptr,
+      PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
+   png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
+      png_sizeof(png_color));
+#endif
    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;
diff --git a/pngtest.c b/pngtest.c
index d7a8977..e61e90d 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1613,4 +1613,4 @@
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_0beta48 your_png_h_is_not_version_1_4_0beta48;
+typedef version_1_4_0beta49 your_png_h_is_not_version_1_4_0beta49;
diff --git a/pngtrans.c b/pngtrans.c
index d008e61..6a42712 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngwio.c b/pngwio.c
index c6212c8..a77607f 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -119,7 +119,7 @@
    png_FILE_p io_ptr;
    if (png_ptr == NULL) return;
    io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
-   if (io_ptr != NULL && fileno(io_ptr) != -1)
+   if (io_ptr != NULL && png_fileno(io_ptr) != -1)
       fflush(io_ptr);
 }
 #endif
@@ -137,7 +137,9 @@
                    data to be written, and a 32-bit unsigned int that is
                    the number of bytes to be written.  The new write
                    function should call png_error(png_ptr, "Error msg")
-                   to exit and output any fatal error messages.
+                   to exit and output any fatal error messages.  May be
+                   NULL, in which case libpng's default function will
+                   be used.
    flush_data_fn - pointer to a new flush function that takes as its
                    arguments a pointer to a png_struct.  After a call to
                    the flush function, there should be no data in any buffers
@@ -146,7 +148,8 @@
                    supplied although it doesn't have to do anything.  If
                    PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
                    time, output_flush_fn will be ignored, although it must be
-                   supplied for compatibility. */
+                   supplied for compatibility.  May be NULL, in which case
+                   libpng's default function will be used. */
 void PNGAPI
 png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
    png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
diff --git a/pngwrite.c b/pngwrite.c
index ffc9946..86308ee 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngwtran.c b/pngwtran.c
index af38e6a..b66a4c7 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngwutil.c b/pngwutil.c
index 46710fa..8dc83fc 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.4.0 [February 14, 2009]
+ * Last changed in libpng 1.4.0 [February 28, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1767,8 +1767,14 @@
    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_calloc(png_ptr,
+#ifdef PNG_CALLOC_SUPPORTED
+     png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
         (png_alloc_size_t)buf_size);
+#else
+     png_ptr->prev_row = (png_bytep)png_malloc(png_ptr,
+        (png_uint_32)buf_size);
+     png_memset(png_ptr->prev_row, 0, buf_size);
+#endif
 
       if (png_ptr->do_filter & PNG_FILTER_UP)
       {
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index 55dbf9b..d2fd7ba 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -178,7 +178,7 @@
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.4.0beta48
+#    VERSION 0.${PNGLIB_RELEASE}.1.4.0beta49
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 326ed5e..aa32a0d 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.4.0beta48
+version=1.4.0beta49
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 9cb7421..df003a1 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.4.0beta48
+Version: 1.4.0beta49
 Libs: -L${libdir} -lpng14
 Cflags: -I${includedir}
diff --git a/scripts/makefile.32sunu b/scripts/makefile.32sunu
index 7efb4c8..f866bc9 100644
--- a/scripts/makefile.32sunu
+++ b/scripts/makefile.32sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.64sunu b/scripts/makefile.64sunu
index a32690e..4746baf 100644
--- a/scripts/makefile.64sunu
+++ b/scripts/makefile.64sunu
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.aix b/scripts/makefile.aix
index 15c4836..03a4cc3 100644
--- a/scripts/makefile.aix
+++ b/scripts/makefile.aix
@@ -20,7 +20,7 @@
 
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
diff --git a/scripts/makefile.beos b/scripts/makefile.beos
index fe36753..5bee010 100644
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.cygwin b/scripts/makefile.cygwin
index 66dbf1f..aaba952 100644
--- a/scripts/makefile.cygwin
+++ b/scripts/makefile.cygwin
@@ -65,7 +65,7 @@
 LIBNAME = libpng14
 PNGMAJ = 14
 CYGDLL = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll
diff --git a/scripts/makefile.darwin b/scripts/makefile.darwin
index 4374781..73c0ba6 100644
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -19,7 +19,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 12
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.dec b/scripts/makefile.dec
index 1949091..15eeb77 100644
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng14
 
diff --git a/scripts/makefile.elf b/scripts/makefile.elf
index e2e368b..c7b8eb1 100644
--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.gcmmx b/scripts/makefile.gcmmx
index e0e9dea..4e7dedc 100644
--- a/scripts/makefile.gcmmx
+++ b/scripts/makefile.gcmmx
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hp64 b/scripts/makefile.hp64
index 2387cce..e53240b 100644
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpgcc b/scripts/makefile.hpgcc
index 527d006..9d37085 100644
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.hpux b/scripts/makefile.hpux
index 04ce3e9..e3a2621 100644
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -18,7 +18,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.linux b/scripts/makefile.linux
index 6ffdcbb..cb27620 100644
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.mingw b/scripts/makefile.mingw
index 1f2972a..c3d3530 100644
--- a/scripts/makefile.mingw
+++ b/scripts/makefile.mingw
@@ -81,7 +81,7 @@
 LIBNAME = libpng14
 PNGMAJ = 14 
 MINGDLL = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 7f0acea..0093260 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -14,7 +14,7 @@
 
 LIB=	png14
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.0beta48
+SHLIB_MINOR=	1.4.0beta49
 SRCS=	pnggccrd.c 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 eb9ea0c..08ca4da 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -13,7 +13,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.4.0beta48
+SHLIB_MINOR=	1.4.0beta49
 SRCS=	pnggccrd.c 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 6cad96b..6a98477 100644
--- a/scripts/makefile.nommx
+++ b/scripts/makefile.nommx
@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 1b56071..a35495c 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -8,7 +8,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.0beta48
+SHLIB_MINOR=	1.4.0beta49
 
 LIB=	png
 SRCS=	png.c pngerror.c pnggccrd.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/makefile.sco b/scripts/makefile.sco
index ef6522e..8c8fe35 100644
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sggcc b/scripts/makefile.sggcc
index 5adf9d3..6673815 100644
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.sgi b/scripts/makefile.sgi
index c0e6202..31af453 100644
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/makefile.so9 b/scripts/makefile.so9
index 6c04979..2ce5586 100644
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng14
 
diff --git a/scripts/makefile.solaris b/scripts/makefile.solaris
index cb906b7..faef92f 100644
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng14
 PNGMAJ = 14
-PNGMIN = 1.4.0beta48
+PNGMIN = 1.4.0beta49
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index dbb6659..388659d 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.4.0beta48
+; Version 1.4.0beta49
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index 12a58f5..3ff3fab 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.4.0beta48
+;Version 1.4.0beta49
   png_build_grayscale_palette
   png_chunk_error
   png_chunk_warning