[libpng16] Imported from libpng-1.6.5.tar

53ae7dc5 · Glenn Randers-Pehrson · cd6a3ef3 · 53ae7dc5 · 53ae7dc5 · 53ae7dc5
28 changed file
--- a/ANNOUNCE
+++ b/ANNOUNCE

-Libpng 1.6.5beta01 - September 12, 2013
+Libpng 1.6.5 - September 14, 2013

-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.
+This is a public release of libpng, intended for use in production codes.

 Files available for download:

 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script

-   1.6.5beta01.tar.xz (LZMA-compressed, recommended)
-   1.6.5beta01.tar.gz
+   libpng-1.6.5.tar.xz (LZMA-compressed, recommended)
+   libpng-1.6.5.tar.gz

 Source files with CRLF line endings (for Windows), without the
 "configure" script

-   lp165b01.7z  (LZMA-compressed, recommended)
-   lp165b01.zip
+   lpng165.7z  (LZMA-compressed, recommended)
+   lpng165.zip

 Other information:

-   1.6.5beta01-README.txt
-   1.6.5beta01-LICENSE.txt
+   libpng-1.6.5-README.txt
+   libpng-1.6.5-LICENSE.txt
   Gnupg/*.asc (PGP armored detached signatures)

 Changes since the last public release (1.6.4):

--- a/CHANGES
+++ b/CHANGES
@@ -4634,7 +4634,8 @@ Version 1.6.4rc01 [September 5, 2013]
 Version 1.6.4 [September 12, 2013]
  No changes.

-Version 1.6.5beta01 [September 12, 2013]
+Version 1.6.5 [September 14, 2013]
+  Removed two stray lines of code from arm/arm_init.c.

 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -252,7 +252,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
 # SET UP LINKS
 if(PNG_SHARED)
  set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.5beta01
+#   VERSION 16.${PNGLIB_RELEASE}.1.6.5
    VERSION 16.${PNGLIB_RELEASE}.0
    SOVERSION 16
    CLEAN_DIRECT_OUTPUT 1)

--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@ this sentence.

 This code is released under the libpng license.

-libpng versions 1.2.6, August 15, 2004, through 1.6.5beta01, September 12, 2013, are
+libpng versions 1.2.6, August 15, 2004, through 1.6.5, September 14, 2013, are
 Copyright (c) 2004, 2006-2013 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
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.

 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 12, 2013
+September 14, 2013
--- a/README
+++ b/README
-README for libpng version 1.6.5beta01 - September 12, 2013 (shared library 16.0)
+README for libpng version 1.6.5 - September 14, 2013 (shared library 16.0)
 See the note about version numbers near the top of png.h

 See INSTALL for instructions on how to install libpng.

--- a/arm/arm_init.c
+++ b/arm/arm_init.c
@@ -3,7 +3,7 @@
 *
 * Copyright (c) 2013 Glenn Randers-Pehrson
 * Written by Mans Rullgard, 2011.
- * Last changed in libpng 1.5.17 [July 18, 2013]
+ * Last changed in libpng 1.6.5 [September 14, 2013]
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer

--- a/configure.ac
+++ b/configure.ac
@@ -18,7 +18,7 @@ AC_PREREQ([2.68])

 dnl Version number stuff here:

-AC_INIT([libpng],[1.6.5beta01],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.5],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts])

 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -39,7 +39,7 @@ dnl automake, so the following is not necessary (and is not defined anyway):
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake

-PNGLIB_VERSION=1.6.5beta01
+PNGLIB_VERSION=1.6.5
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=5

--- a/libpng-manual.txt
+++ b/libpng-manual.txt
 libpng-manual.txt - A description on how to use and modify libpng

- libpng version 1.6.5beta01 - September 12, 2013
+ libpng version 1.6.5 - September 14, 2013
 Updated and distributed by Glenn Randers-Pehrson
 <glennrp at users.sourceforge.net>
 Copyright (c) 1998-2013 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng

 Based on:

- libpng versions 0.97, January 1998, through 1.6.5beta01 - September 12, 2013
+ libpng versions 0.97, January 1998, through 1.6.5 - September 14, 2013
 Updated and distributed by Glenn Randers-Pehrson
 Copyright (c) 1998-2013 Glenn Randers-Pehrson

@@ -5229,13 +5229,13 @@ Other rules can be inferred by inspecting the libpng source.

 XVI. Y2K Compliance in libpng

-September 12, 2013
+September 14, 2013

 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 1.6.5beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.5 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.

 Libpng only has two year fields.  One is a 2-byte unsigned integer

--- a/libpng.3
+++ b/libpng.3
-.TH LIBPNG 3 "September 12, 2013"
+.TH LIBPNG 3 "September 14, 2013"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.5beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.5
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -504,7 +504,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng

- libpng version 1.6.5beta01 - September 12, 2013
+ libpng version 1.6.5 - September 14, 2013
 Updated and distributed by Glenn Randers-Pehrson
 <glennrp at users.sourceforge.net>
 Copyright (c) 1998-2013 Glenn Randers-Pehrson
@@ -515,7 +515,7 @@ libpng-manual.txt - A description on how to use and modify libpng

 Based on:

- libpng versions 0.97, January 1998, through 1.6.5beta01 - September 12, 2013
+ libpng versions 0.97, January 1998, through 1.6.5 - September 14, 2013
 Updated and distributed by Glenn Randers-Pehrson
 Copyright (c) 1998-2013 Glenn Randers-Pehrson

@@ -5734,13 +5734,13 @@ Other rules can be inferred by inspecting the libpng source.

 .SH XVI. Y2K Compliance in libpng

-September 12, 2013
+September 14, 2013

 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 1.6.5beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.5 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.

 Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -5960,6 +5960,7 @@ the first widely used release:
 1.6.4beta01-02      16    10604  16.so.16.4[.0]
 1.6.4rc01           16    10604  16.so.16.4[.0]
 1.6.4               16    10604  16.so.16.4[.0]
+ 1.6.5               16    10605  16.so.16.5[.0]

 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -6016,7 +6017,7 @@ possible without all of you.

 Thanks to Frank J. T. Wojcik for helping with the documentation.

-Libpng version 1.6.5beta01 - September 12, 2013:
+Libpng version 1.6.5 - September 14, 2013:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).

@@ -6039,7 +6040,7 @@ this sentence.

 This code is released under the libpng license.

-libpng versions 1.2.6, August 15, 2004, through 1.6.5beta01, September 12, 2013, are
+libpng versions 1.2.6, August 15, 2004, through 1.6.5, September 14, 2013, 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
@@ -6138,7 +6139,7 @@ certification mark of the Open Source Initiative.

 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 12, 2013
+September 14, 2013

 .\" end of man page

--- a/libpngpf.3
+++ b/libpngpf.3
-.TH LIBPNGPF 3 "September 12, 2013"
+.TH LIBPNGPF 3 "September 14, 2013"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.5beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.5
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"

--- a/png.5
+++ b/png.5
-.TH PNG 5 "September 12, 2013"
+.TH PNG 5 "September 14, 2013"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION

--- a/png.c
+++ b/png.c
@@ -14,7 +14,7 @@
 #include "pngpriv.h"

 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_5beta01 Your_png_h_is_not_version_1_6_5beta01;
+typedef png_libpng_version_1_6_5 Your_png_h_is_not_version_1_6_5;

 /* Tells libpng that we have already handled the first "num_bytes" bytes
 * of the PNG file signature.  If the PNG data is embedded into another
@@ -768,13 +768,13 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
   return PNG_STRING_NEWLINE \
-     "libpng version 1.6.5beta01 - September 12, 2013" PNG_STRING_NEWLINE \
+     "libpng version 1.6.5 - September 14, 2013" PNG_STRING_NEWLINE \
     "Copyright (c) 1998-2013 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 "libpng version 1.6.5beta01 - September 12, 2013\
+      return "libpng version 1.6.5 - September 14, 2013\
      Copyright (c) 1998-2013 Glenn Randers-Pehrson\
      Copyright (c) 1996-1997 Andreas Dilger\
      Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";

--- a/png.h
+++ b/png.h

 /* png.h - header file for PNG reference library
 *
- * libpng version 1.6.5beta01 - September 12, 2013
+ * libpng version 1.6.5 - September 14, 2013
 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -11,7 +11,7 @@
 * 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 1.6.5beta01 - September 12, 2013: Glenn
+ *   libpng versions 0.97, January 1998, through 1.6.5 - September 14, 2013: Glenn
 *   See also "Contributing Authors", below.
 *
 * Note about libpng version numbers:
@@ -181,6 +181,7 @@
 *    1.6.4beta01-02          16    10604  16.so.16.4[.0]
 *    1.6.4rc01               16    10604  16.so.16.4[.0]
 *    1.6.4                   16    10604  16.so.16.4[.0]
+ *    1.6.5                   16    10605  16.so.16.5[.0]
 *
 *   Henceforth the source version will match the shared-library major
 *   and minor numbers; the shared-library major version number will be
@@ -212,7 +213,7 @@
 *
 * This code is released under the libpng license.
 *
- * libpng versions 1.2.6, August 15, 2004, through 1.6.5beta01, September 12, 2013, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.6.5, September 14, 2013, are
 * Copyright (c) 2004, 2006-2013 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:
@@ -324,13 +325,13 @@
 * Y2K compliance in libpng:
 * =========================
 *
- *    September 12, 2013
+ *    September 14, 2013
 *
 *    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 1.6.5beta01 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.5 are Y2K compliant.  It is my belief that
 *    earlier versions were also Y2K compliant.
 *
 *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -390,9 +391,9 @@
 */

 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.5beta01"
+#define PNG_LIBPNG_VER_STRING "1.6.5"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.6.5beta01 - September 12, 2013\n"
+     " libpng version 1.6.5 - September 14, 2013\n"

 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -406,7 +407,7 @@
 * PNG_LIBPNG_VER_STRING, omitting any leading zero:
 */

-#define PNG_LIBPNG_VER_BUILD  01
+#define PNG_LIBPNG_VER_BUILD  0

 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -423,7 +424,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                       PNG_LIBPNG_BUILD_PRIVATE */

-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE

 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
 * We must not include leading zeros.
@@ -536,7 +537,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
 * do not agree upon the version number.
 */
-typedef char* png_libpng_version_1_6_5beta01;
+typedef char* png_libpng_version_1_6_5;

 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
 *

--- a/pngconf.h
+++ b/pngconf.h

 /* pngconf.h - machine configurable file for libpng
 *
- * libpng version 1.6.5beta01 - September 12, 2013
+ * libpng version 1.6.5 - September 14, 2013
 *
 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

--- a/pngrtran.c
+++ b/pngrtran.c

 /* pngrtran.c - transforms the data in a row for PNG readers
 *
- * Last changed in libpng 1.6.4 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.4 [September 14, 2013]
 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

--- a/pngrutil.c
+++ b/pngrutil.c

 /* pngrutil.c - utilities to read a PNG file
 *
- * Last changed in libpng 1.6.4 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.4 [September 14, 2013]
 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

--- a/pngtest.c
+++ b/pngtest.c
@@ -1968,4 +1968,4 @@ main(void)
 #endif

 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_5beta01 Your_png_h_is_not_version_1_6_5beta01;
+typedef png_libpng_version_1_6_5 Your_png_h_is_not_version_1_6_5;
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt

 VisualStudio instructions

-libpng version 1.6.5beta01 - September 12, 2013
+libpng version 1.6.5 - September 14, 2013

 Copyright (c) 1998-2010 Glenn Randers-Pehrson


--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
 * zlib.props - location of zlib source
 *
- * libpng version 1.6.5beta01 - September 12, 2013
+ * libpng version 1.6.5 - September 14, 2013
 *
 * Copyright (c) 1998-2011 Glenn Randers-Pehrson
 *

--- a/scripts/README.txt
+++ b/scripts/README.txt

-Makefiles for  libpng version 1.6.5beta01 - September 12, 2013
+Makefiles for  libpng version 1.6.5 - September 14, 2013

 pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng16.so.16.1.6.5beta01)
+                       (gcc, creates libpng16.so.16.1.6.5)
 makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
 makefile.knr      =>  Archaic UNIX Makefile that converts files with
                       ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.dec      =>  DEC Alpha UNIX makefile
 makefile.dj2      =>  DJGPP 2 makefile
 makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       (gcc, creates libpng16.so.16.1.6.5beta01)
+                       (gcc, creates libpng16.so.16.1.6.5)
 makefile.freebsd  =>  FreeBSD makefile
 makefile.gcc      =>  Generic gcc makefile
 makefile.hpgcc    =>  HPUX makefile using gcc
@@ -35,12 +35,12 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
 makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
 makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng16.so.16.1.6.5beta01)
+                       creates libpng16.so.16.1.6.5)
 makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
 makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng16.so.16.1.6.5beta01)
+                       creates libpng16.so.16.1.6.5)
 makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng16.so.16.1.6.5beta01)
+                       creates libpng16.so.16.1.6.5)
 makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
 makefile.sunos    =>  Sun makefile
 makefile.32sunu   =>  Sun Ultra 32-bit makefile

--- a/scripts/def.dfn
+++ b/scripts/def.dfn
@@ -21,7 +21,7 @@ PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
 PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
 PNG_DFN ""
 PNG_DFN "EXPORTS"
-PNG_DFN ";Version 1.6.5beta01"
+PNG_DFN ";Version 1.6.5"

 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
        PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"

--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@

 # Modeled after libxml-config.

-version=1.6.5beta01
+version=1.6.5
 prefix=""
 libdir=""
 libs=""

--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16

 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.5beta01
+Version: 1.6.5
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng16

 LIB=	png16
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.6.5beta01
+SHLIB_MINOR=	1.6.5
 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

--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include

 LIB=	png
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.5beta01
+SHLIB_MINOR=	1.6.5
 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

--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat

 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.5beta01
+SHLIB_MINOR=	1.6.5

 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \

--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
-/* libpng 1.6.5beta01 STANDARD API DEFINITION */
+/* libpng 1.6.5 STANDARD API DEFINITION */

 /* pnglibconf.h - library build configuration */

-/* Libpng version 1.6.5beta01 - September 12, 2013 */
+/* Libpng version 1.6.5 - September 14, 2013 */

 /* Copyright (c) 1998-2013 Glenn Randers-Pehrson */


--- a/scripts/symbols.def
+++ b/scripts/symbols.def
-;Version 1.6.5beta01
+;Version 1.6.5
 ;--------------------------------------------------------------
 ; LIBPNG symbol list as a Win32 DEF file
 ; Contains all the symbols that can be exported from libpng