/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* $Id$ */ package org.apache.fop.afp.goca; import java.io.IOException; import java.io.OutputStream; import org.apache.fop.afp.util.BinaryUtils; /** * A GOCA graphics segment */ public final class GraphicsChainedSegment extends AbstractGraphicsDrawingOrderContainer { /** The maximum segment data length */ public static final int MAX_DATA_LEN = 8192; private byte[] predecessorNameBytes; private boolean appended; private boolean prologPresent; /** * Main constructor * * @param name * the name of this graphics segment */ public GraphicsChainedSegment(String name) { this(name, null, false, false); } /** * Constructor * * @param name * the name of this graphics segment * @param predecessorNameBytes * the name of the predecessor in this chain * @param appended true if this segment is appended to the previous one * @param prologPresent true if this segment starts with a prolog */ public GraphicsChainedSegment(String name, byte[] predecessorNameBytes, boolean appended, boolean prologPresent) { super(name); if (predecessorNameBytes != null) { this.predecessorNameBytes = new byte[predecessorNameBytes.length]; System.arraycopy(predecessorNameBytes, 0, this.predecessorNameBytes, 0, predecessorNameBytes.length); } this.appended = appended; this.prologPresent = prologPresent; } /** {@inheritDoc} */ @Override public int getDataLength() { return 14 + super.getDataLength(); } private static final byte APPEND_NEW_SEGMENT = 0; private static final byte APPEND_TO_EXISING = 6; private static final byte PROLOG = 0x10; private static final int NAME_LENGTH = 4; /** {@inheritDoc} */ @Override protected int getNameLength() { return NAME_LENGTH; } byte getOrderCode() { return 0x70; } /** {@inheritDoc} */ @Override public void writeToStream(OutputStream os) throws IOException { byte[] data = new byte[14]; data[0] = getOrderCode(); // BEGIN_SEGMENT data[1] = 0x0C; // Length of following parameters // segment name byte[] nameBytes = getNameBytes(); System.arraycopy(nameBytes, 0, data, 2, NAME_LENGTH); data[6] = 0x00; // FLAG1 (ignored) //FLAG2 data[7] |= this.appended ? APPEND_TO_EXISING : APPEND_NEW_SEGMENT; if (this.prologPresent) { data[7] |= PROLOG; } int dataLength = super.getDataLength(); byte[] len = BinaryUtils.convert(dataLength, 2); data[8] = len[0]; // SEGL data[9] = len[1]; // P/S NAME (predecessor name) if (predecessorNameBytes != null) { System.arraycopy(predecessorNameBytes, 0, data, 10, NAME_LENGTH); } os.write(data); writeObjects(objects, os); } /** {@inheritDoc} */ @Override public String toString() { return "GraphicsChainedSegment(name=" + super.getName() + ", len: " + getDataLength() + ")"; } }