1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* 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 */
protected 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() + ")";
}
}
|
