| package org.eclipse.swt.internal.image; | |
| /* | |
| * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. | |
| * This file is made available under the terms of the Common Public License v1.0 | |
| * which accompanies this distribution, and is available at | |
| * http://www.eclipse.org/legal/cpl-v10.html | |
| */ | |
| import org.eclipse.swt.*; | |
| class PngIendChunk extends PngChunk { | |
| PngIendChunk(byte[] reference){ | |
| super(reference); | |
| } | |
| /** | |
| * 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); | |
| } | |
| } |