blob: 9c815cb6f3385665fcd1c428eacd12267b1343a6 (
plain)
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
|
/*
* Copyright 2006 The Apache Software Foundation.
*
* Licensed 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.render.afp.modca;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.render.afp.tools.BinaryUtils;
/**
* Contains the image points that define the IM image raster pattern.
*
* A raster pattern is the array of presentation device pels that forms
* the image. The image data is uncompressed. Bits are grouped into
* bytes and are ordered from left to right within each byte. Each bit
* in the image data represents an image point and is mapped to
* presentation device pels as specified in the IOC structured field.
* A bit with value B'1' indicates a significant image point; a bit
* with value B'0' indicates an insignificant image point.
* Image points are recorded from left to right in rows that represents
* scan lines (X direction), and rows representing scan lines are
* recorded from top to bottom (Y direction). When the image is
* presented, all image points in a row are presented before any
* image points in the next sequential row are presented, and all rows
* have the same number of image points. If the total number of image
* points is not a multiple of 8, the last byte of the image data is
* padded to a byte boundary. The padding bits do not represent image
* points and are ignored by presentation devices.
*/
public class ImageRasterData extends AbstractAFPObject {
/**
* The image raster data
*/
private byte[] _rasterdata;
/**
* Constructor for the image raster data object
* @param rasterdata The raster image data
*/
public ImageRasterData(byte[] rasterdata) {
_rasterdata = rasterdata;
}
/**
* Accessor method to write the AFP datastream for the Image Raster Data
* @param os The stream to write to
* @throws java.io.IOException
*/
public void writeDataStream(OutputStream os)
throws IOException {
byte[] data = new byte[9];
data[0] = 0x5A;
// The size of the structured field
byte[] x = BinaryUtils.convert(_rasterdata.length + 8, 2);
data[1] = x[0];
data[2] = x[1];
data[3] = (byte) 0xD3;
data[4] = (byte) 0xEE;
data[5] = (byte) 0x7B;
data[6] = 0x00;
data[7] = 0x00;
data[8] = 0x00;
os.write(data);
os.write(_rasterdata);
}
}
|
