1 /* RasterGraphics.java -- A Graphics2D impl for Rasters
2    Copyright (C) 2006 Free Software Foundation, Inc.
3 
4 This file is part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING.  If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module.  An independent module is a module which is not derived from
33 or based on this library.  If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so.  If you do not wish to do so, delete this
36 exception statement from your version. */
37 
38 
39 package gnu.java.awt.java2d;
40 
41 import java.awt.GraphicsConfiguration;
42 import java.awt.Rectangle;
43 import java.awt.image.ColorModel;
44 import java.awt.image.WritableRaster;
45 
46 /**
47  * A Graphics2D implementation that operates on Raster objects. This is
48  * primarily used for BufferedImages, but can theoretically be used on
49  * arbitrary WritableRasters.
50  *
51  * @author Roman Kennke (kennke@aicas.com)
52  */
53 public class RasterGraphics
54   extends AbstractGraphics2D
55 {
56 
57   /**
58    * The raster on which we operate.
59    */
60   private WritableRaster raster;
61 
62   /**
63    * The color model of this Graphics instance.
64    */
65   private ColorModel colorModel;
66 
RasterGraphics(WritableRaster r, ColorModel cm)67   public RasterGraphics(WritableRaster r, ColorModel cm)
68   {
69     super();
70     raster = r;
71     colorModel = cm;
72     init();
73   }
74 
75   @Override
renderScanline(int y, ScanlineCoverage c)76   public void renderScanline(int y, ScanlineCoverage c)
77   {
78     if (y >= getDeviceBounds().width)
79       return;
80 
81     super.renderScanline(y, c);
82   }
83 
84   /**
85    * Returns the color model of this Graphics object.
86    *
87    * @return the color model of this Graphics object
88    */
getColorModel()89   protected ColorModel getColorModel()
90   {
91     return colorModel;
92   }
93 
94   /**
95    * Returns a WritableRaster that is used by this class to perform the
96    * rendering in. It is not necessary that the target surface immediately
97    * reflects changes in the raster. Updates to the raster are notified via
98    * {@link AbstractGraphics2D#updateRaster}.
99    *
100    * @return the destination raster
101    */
getDestinationRaster()102   protected WritableRaster getDestinationRaster()
103   {
104     return raster;
105   }
106 
getDeviceConfiguration()107   public GraphicsConfiguration getDeviceConfiguration()
108   {
109     // TODO Auto-generated method stub
110     return null;
111   }
112 
113   @Override
getDeviceBounds()114   protected Rectangle getDeviceBounds()
115   {
116     return this.raster.getBounds();
117   }
118 }
119