Update bundled libpng to version 1.6.32

Also add import script.
The remaining diff to clean 1.6.32 is archived in the qtpatches.diff file.

[ChangeLog][Third-Party Code] libpng was updated to version 1.6.32

Change-Id: I1b4b78e39a6eb098d1b66c2528e47544bd9e6713
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/src/3rdparty/libpng/import_from_libpng_tarball.sh b/src/3rdparty/libpng/import_from_libpng_tarball.sh
new file mode 100755
index 0000000000..d67b7903a6
--- /dev/null
+++ b/src/3rdparty/libpng/import_from_libpng_tarball.sh
@@ -0,0 +1,113 @@
+#! /bin/sh
+#############################################################################
+##
+## Copyright (C) 2017 André Klitzing
+## Contact: https://www.qt.io/licensing/
+##
+## This file is the build configuration utility of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU Lesser General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU Lesser
+## General Public License version 3 as published by the Free Software
+## Foundation and appearing in the file LICENSE.LGPL3 included in the
+## packaging of this file. Please review the following information to
+## ensure the GNU Lesser General Public License version 3 requirements
+## will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 2.0 or (at your option) the GNU General
+## Public license version 3 or any later version approved by the KDE Free
+## Qt Foundation. The licenses are as published by the Free Software
+## Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-2.0.html and
+## https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+# This is a small script to copy the required files from a libpng tarball
+# into 3rdparty/libpng/
+
+if [ $# -ne 2 ]; then
+    echo "Usage: $0 libpng_tarball_dir/ \$QTDIR/src/3rdparty/libpng/"
+    exit 1
+fi
+
+LIBPNG_DIR=$1
+TARGET_DIR=$2
+
+if [ ! -d "$LIBPNG_DIR" -o ! -r "$LIBPNG_DIR" -o ! -d "$TARGET_DIR" -o ! -w "$TARGET_DIR" ]; then
+    echo "Either the libpng source dir or the target dir do not exist,"
+    echo "are not directories or have the wrong permissions."
+    exit 2
+fi
+
+# with 1 argument, copies LIBPNG_DIR/$1 to TARGET_DIR/$1
+# with 2 arguments, copies LIBPNG_DIR/$1 to TARGET_DIR/$2
+copy_file() {
+    if [ $# -lt 1 -o $# -gt 2  ]; then
+        echo "Wrong number of arguments to copy_file"
+        exit 3
+    fi
+
+    SOURCE_FILE=$1
+    if [ -n "$2" ]; then
+        DEST_FILE=$2
+    else
+        DEST_FILE=$1
+    fi
+
+    mkdir -p "$TARGET_DIR/$(dirname "$SOURCE_FILE")"
+    cp "$LIBPNG_DIR/$SOURCE_FILE" "$TARGET_DIR/$DEST_FILE"
+}
+
+copy_file "scripts/pnglibconf.h.prebuilt" "pnglibconf.h"
+
+FILES="
+   ANNOUNCE
+   README
+   CHANGES
+   LICENSE
+   INSTALL
+   libpng-manual.txt
+
+   png.c
+   pngerror.c
+   pngget.c
+   pngmem.c
+   pngpread.c
+   pngread.c
+   pngrio.c
+   pngrtran.c
+   pngrutil.c
+   pngset.c
+   pngtrans.c
+   pngwio.c
+   pngwrite.c
+   pngwtran.c
+   pngwutil.c
+
+   png.h
+   pngpriv.h
+   pngstruct.h
+   pnginfo.h
+   pngconf.h
+   pngdebug.h
+"
+
+for i in $FILES; do
+    copy_file "$i" "$i"
+done