org.apache.fop.afp.goca.GraphicsChainedSegment Maven / Gradle / Ivy
/*
* 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: GraphicsChainedSegment.java 1617052 2014-08-10 06:55:01Z gadams $ */
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() + ")";
}
}