Mercurial > projects > dwt-mac
view dwt/internal/image/PngIendChunk.d @ 34:5123b17c98ef
Ported dwt.events.*, dwt.graphics.GC, Region, dwt.internal.image.*
author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sun, 14 Sep 2008 01:45:57 +0200 |
parents | 1a8b3cb347e0 |
children |
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/******************************************************************************* * 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwt.internal.image.PngIendChunk; import dwt.DWT; import dwt.internal.image.PngFileReadState; import dwt.internal.image.PngIhdrChunk; import dwt.internal.image.PngChunk; class PngIendChunk : PngChunk { this() { super(0); setType(TYPE_IEND); setCRC(computeCRC()); } this(byte[] reference){ super(reference); } override int getChunkType() { return CHUNK_IEND; } /** * Answer whether the chunk is a valid IEND chunk. */ override 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); } }