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Java > Open Source Codes > org > pdfbox > pdmodel > graphics > color > PDDeviceGray


1 /**
2  * Copyright (c) 2004, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.pdmodel.graphics.color;
32
33 import java.awt.color.ColorSpace JavaDoc;
34
35 import java.awt.image.ColorModel JavaDoc;
36 import java.awt.image.ComponentColorModel JavaDoc;
37 import java.awt.image.DataBuffer JavaDoc;
38 import java.awt.Transparency JavaDoc;
39
40 import java.io.IOException JavaDoc;
41
42 /**
43  * This class represents a Gray color space.
44  *
45  * @author <a HREF="mailto:ben@benlitchfield.com">Ben Litchfield</a>
46  * @version $Revision: 1.6 $
47  */
48 public class PDDeviceGray extends PDColorSpace
49 {
50     /**
51      * The name of this color space.
52      */
53     public static final String JavaDoc NAME = "DeviceGray";
54
55     /**
56      * The abbreviated name of this color space.
57      */
58     public static final String JavaDoc ABBREVIATED_NAME = "G";
59
60     /**
61      * This will return the name of the color space.
62      *
63      * @return The name of the color space.
64      */
65     public String JavaDoc getName()
66     {
67         return NAME;
68     }
69
70     /**
71      * This will get the number of components that this color space is made up of.
72      *
73      * @return The number of components in this color space.
74      *
75      * @throws IOException If there is an error getting the number of color components.
76      */
77     public int getNumberOfComponents() throws IOException JavaDoc
78     {
79         return 1;
80     }
81
82     /**
83      * Create a Java colorspace for this colorspace.
84      *
85      * @return A color space that can be used for Java AWT operations.
86      *
87      * @throws IOException If there is an error creating the color space.
88      */
89     public ColorSpace JavaDoc createColorSpace() throws IOException JavaDoc
90     {
91         return ColorSpace.getInstance( ColorSpace.CS_GRAY );
92     }
93     
94     /**
95      * Create a Java color model for this colorspace.
96      *
97      * @param bpc The number of bits per component.
98      *
99      * @return A color model that can be used for Java AWT operations.
100      *
101      * @throws IOException If there is an error creating the color model.
102      */
103     public ColorModel JavaDoc createColorModel( int bpc ) throws IOException JavaDoc
104     {
105         ColorSpace JavaDoc cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
106         int[] nBits = {bpc};
107         ColorModel JavaDoc colorModel = new ComponentColorModel JavaDoc(cs, nBits, false,false,
108                 Transparency.OPAQUE,DataBuffer.TYPE_BYTE);
109         return colorModel;
110
111     }
112 }
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