1 files changed, 55 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIendChunk.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIendChunk.java
new file mode 100755
index 0000000000..ed604e0ae9
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/PngIendChunk.java
@@ -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
+ *******************************************************************************/
+package org.eclipse.swt.internal.image;
+
+
+import org.eclipse.swt.*;
+
+class PngIendChunk extends 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) 
+	{
+		SWT.error(SWT.ERROR_INVALID_IMAGE);
+	} else {
+		readState.readIEND = true;
+	}
+	
+	super.validate(readState, headerChunk);
+	
+	// IEND chunks are not allowed to have any data.
+	if (getLength() > 0) SWT.error(SWT.ERROR_INVALID_IMAGE);
+}
+
+}