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1   /*
2    * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  
27  
28  package java.awt;
29  
30  import java.awt.image.ColorModel;
31  import java.awt.image.Raster;
32  import java.awt.image.WritableRaster;
33  import sun.awt.image.IntegerComponentRaster;
34  import java.util.Arrays;
35  
36  class ColorPaintContext implements PaintContext {
37      int color;
38      WritableRaster savedTile;
39  
40      protected ColorPaintContext(int color, ColorModel cm) {
41          this.color = color;
42      }
43  
44      public void dispose() {
45      }
46  
47      /*
48       * Returns the RGB value representing the color in the default sRGB
49       * {@link ColorModel}.
50       * (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are
51       * blue).
52       * @return the RGB value of the color in the default sRGB
53       *         <code>ColorModel</code>.
54       * @see java.awt.image.ColorModel#getRGBdefault
55       * @see #getRed
56       * @see #getGreen
57       * @see #getBlue
58       */
59      int getRGB() {
60          return color;
61      }
62  
63      public ColorModel getColorModel() {
64          return ColorModel.getRGBdefault();
65      }
66  
67      public synchronized Raster getRaster(int x, int y, int w, int h) {
68          WritableRaster t = savedTile;
69  
70          if (t == null || w > t.getWidth() || h > t.getHeight()) {
71              t = getColorModel().createCompatibleWritableRaster(w, h);
72              IntegerComponentRaster icr = (IntegerComponentRaster) t;
73              Arrays.fill(icr.getDataStorage(), color);
74              // Note - markDirty is probably unnecessary since icr is brand new
75              icr.markDirty();
76              if (w <= 64 && h <= 64) {
77                  savedTile = t;
78              }
79          }
80  
81          return t;
82      }
83  }