--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/internal/image/PngIendChunk.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+module dwt.internal.image;
+
+
+import dwt.DWT;
+
+class PngIendChunk : PngChunk {
+
+PngIendChunk() {
+    super(0);
+    setType(TYPE_IEND);
+    setCRC(computeCRC());
+}
+
+PngIendChunk(byte[] reference){
+    super(reference);
+}
+
+int getChunkType() {
+    return CHUNK_IEND;
+}
+
+/**
+ * Answer whether the chunk is a valid IEND chunk.
+ */
+void validate(PngFileReadState readState, PngIhdrChunk headerChunk) {
+    // An IEND chunk is invalid if no IHDR has been read.
+    // Or if a palette is required and has not been read.
+    // Or if no IDAT chunk has been read.
+    if (!readState.readIHDR
+        || (headerChunk.getMustHavePalette() && !readState.readPLTE)
+        || !readState.readIDAT
+        || readState.readIEND) 
+    {
+        DWT.error(DWT.ERROR_INVALID_IMAGE);
+    } else {
+        readState.readIEND = true;
+    }
+    
+    super.validate(readState, headerChunk);
+    
+    // IEND chunks are not allowed to have any data.
+    if (getLength() > 0) DWT.error(DWT.ERROR_INVALID_IMAGE);
+}
+
+}