?? pngidatchunk.java
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/******************************************************************************* * Copyright (c) 2000, 2003 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are 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 * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.internal.image;import org.eclipse.swt.*;class PngIdatChunk extends PngChunk {PngIdatChunk(byte[] reference){ super(reference);}/** * Answer whether the chunk is a valid IDAT chunk. */void validate(PngFileReadState readState, PngIhdrChunk headerChunk) { if (!readState.readIHDR || (headerChunk.getMustHavePalette() && !readState.readPLTE) || readState.readIEND) { SWT.error(SWT.ERROR_INVALID_IMAGE); } else { readState.readIDAT = true; } super.validate(readState, headerChunk);}byte getDataByteAtOffset(int offset) { return reference[DATA_OFFSET + offset];}}
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