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
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package convwatch;
import java.awt.Image;
import java.awt.image.PixelGrabber;
import java.awt.image.ImageObserver;
import java.io.File;
//import javax.imageio.ImageIO;
import java.lang.reflect.Method;
class ImageHelper
{
Image m_aImage;
int[] m_aPixels;
int m_w = 0;
int m_h = 0;
boolean m_bGrabbed = false;
public ImageHelper(Image _aImage)
{
m_aImage = _aImage;
// grab all (consume much memory)
m_w = getWidth();
m_h = getHeight();
int x = 0;
int y = 0;
m_aPixels = new int[m_w * m_h];
PixelGrabber pg = new PixelGrabber(m_aImage, x, y, m_w, m_h, m_aPixels, 0, m_w);
try {
pg.grabPixels();
} catch (InterruptedException e) {
System.err.println("interrupted waiting for pixels!");
return;
}
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
System.err.println("image fetch aborted or errored");
return;
}
m_bGrabbed = true;
}
public int getWidth() {return m_aImage.getWidth(null);}
public int getHeight() {return m_aImage.getHeight(null);}
// direct access to a pixel
public int getPixel(int x, int y)
{
return m_aPixels[y * m_w + x];
}
// Write down the current image to a file.
// public void storeImage(String _sFilename)
// {
// }
public static ImageHelper createImageHelper(String _sFilename)
throws java.io.IOException
{
Image aImage = null;
File aFile = new File(_sFilename);
Exception ex = null;
try {
Class imageIOClass = Class.forName("javax.imageio.ImageIO");
Method readMethod = imageIOClass.getDeclaredMethod("read", new Class[]{java.io.File.class});
Object retValue = readMethod.invoke(imageIOClass, new Object[]{aFile});
aImage = (Image)retValue;
}
catch(java.lang.ClassNotFoundException e) {
ex = e;
}
catch(java.lang.NoSuchMethodException e) {
ex = e;
}
catch(java.lang.IllegalAccessException e) {
ex = e;
}
catch(java.lang.reflect.InvocationTargetException e) {
ex = e;
}
if (ex != null) {
// get Java version:
String javaVersion = System.getProperty("java.version");
throw new java.io.IOException(
"Cannot construct object with current Java version " +
javaVersion + ": " + ex.getMessage());
}
// aImage = ImageIO.read(aFile);
return new ImageHelper(aImage);
}
}
|
