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


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.Transparency JavaDoc;
34
35 import java.awt.color.ColorSpace JavaDoc;
36
37 import java.awt.image.ColorModel JavaDoc;
38 import java.awt.image.ComponentColorModel JavaDoc;
39 import java.awt.image.DataBuffer JavaDoc;
40
41 import java.io.IOException JavaDoc;
42
43 /**
44  * This class represents an RGB color space.
45  *
46  * @author <a HREF="mailto:ben@benlitchfield.com">Ben Litchfield</a>
47  * @version $Revision: 1.8 $
48  */
49 public class PDDeviceRGB extends PDColorSpace
50 {
51     /**
52      * The name of this color space.
53      */
54     public static final String JavaDoc NAME = "DeviceRGB";
55
56     /**
57      * The abbreviated name of this color space.
58      */
59     public static final String JavaDoc ABBREVIATED_NAME = "RGB";
60     
61     /**
62      * This is the single instance of this class.
63      */
64     public static final PDDeviceRGB INSTANCE = new PDDeviceRGB();
65     
66     /**
67      * This class is immutable.
68      */
69     private PDDeviceRGB()
70     {
71         //only here to make immutable.
72 }
73
74     /**
75      * This will return the name of the color space.
76      *
77      * @return The name of the color space.
78      */
79     public String JavaDoc getName()
80     {
81         return NAME;
82     }
83
84     /**
85      * This will get the number of components that this color space is made up of.
86      *
87      * @return The number of components in this color space.
88      *
89      * @throws IOException If there is an error getting the number of color components.
90      */
91     public int getNumberOfComponents() throws IOException JavaDoc
92     {
93         return 3;
94     }
95
96     /**
97      * Create a Java colorspace for this colorspace.
98      *
99      * @return A color space that can be used for Java AWT operations.
100      *
101      * @throws IOException If there is an error creating the color space.
102      */
103     public ColorSpace JavaDoc createColorSpace() throws IOException JavaDoc
104     {
105         return ColorSpace.getInstance( ColorSpace.CS_sRGB );
106     }
107     
108     /**
109      * Create a Java color model for this colorspace.
110      *
111      * @param bpc The number of bits per component.
112      *
113      * @return A color model that can be used for Java AWT operations.
114      *
115      * @throws IOException If there is an error creating the color model.
116      */
117     public ColorModel JavaDoc createColorModel( int bpc ) throws IOException JavaDoc
118     {
119         int[] nbBits = { bpc, bpc, bpc };
120         ComponentColorModel JavaDoc componentColorModel =
121                 new ComponentColorModel JavaDoc( createColorSpace(),
122                                          nbBits,
123                                          false,
124                                          false,
125                                          Transparency.OPAQUE,
126                                          DataBuffer.TYPE_BYTE );
127         
128         return componentColorModel;
129     }
130 }
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