--- old/src/share/classes/com/sun/imageio/plugins/png/PNGMetadata.java	2014-07-09 20:42:22.868675400 +0400
+++ new/src/share/classes/com/sun/imageio/plugins/png/PNGMetadata.java	2014-07-09 20:42:22.193089600 +0400
@@ -1254,8 +1254,11 @@
             if (name.equals("IHDR")) {
                 IHDR_width = getIntAttribute(node, "width");
                 IHDR_height = getIntAttribute(node, "height");
-                IHDR_bitDepth = getEnumeratedAttribute(node, "bitDepth",
-                                                       IHDR_bitDepths);
+                IHDR_bitDepth =
+                        Integer.valueOf(IHDR_bitDepths[
+                                getEnumeratedAttribute(node,
+                                                    "bitDepth",
+                                                    IHDR_bitDepths)]);
                 IHDR_colorType = getEnumeratedAttribute(node, "colorType",
                                                         IHDR_colorTypeNames);
                 IHDR_compressionMethod =
--- /dev/null	2014-07-09 20:42:27.000000000 +0400
+++ new/test/javax/imageio/plugins/png/PngDitDepthTest.java	2014-07-09 20:42:26.399623800 +0400
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+* @test
+* @bug 4991647
+* @summary PNGMetadata.getAsTree() sets bitDepth to invalid value
+* @run main PngDitDepthTest
+*/
+
+import org.w3c.dom.Node;
+
+import javax.imageio.ImageIO;
+import javax.imageio.ImageTypeSpecifier;
+import javax.imageio.ImageWriter;
+import javax.imageio.metadata.IIOInvalidTreeException;
+import javax.imageio.metadata.IIOMetadata;
+import java.awt.image.ColorModel;
+import java.awt.image.SampleModel;
+import java.util.Iterator;
+
+public class PngDitDepthTest {
+    
+    public static void main(String[] args) throws IIOInvalidTreeException {
+
+        // getting the writer for the png format
+        Iterator iter = ImageIO.getImageWritersByFormatName("png");
+        ImageWriter writer = (ImageWriter) iter.next();
+
+        // creating a color model
+        ColorModel colorModel = ColorModel.getRGBdefault();
+
+        // creating a sample model
+        SampleModel sampleModel = colorModel.createCompatibleSampleModel(640, 480);
+
+        // creating a default metadata object
+        IIOMetadata metaData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(colorModel, sampleModel), null);
+        String formatName = metaData.getNativeMetadataFormatName();
+
+        // first call
+        Node metaDataNode = metaData.getAsTree(formatName);
+        try {
+            metaData.setFromTree(formatName, metaDataNode);
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+
+        // second call (bitdepht is already set to an invalid value)
+        metaDataNode = metaData.getAsTree(formatName);
+
+        metaData.setFromTree(formatName, metaDataNode);
+
+    }
+}