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1   /*
2    *  MicroEmulator
3    *  Copyright (C) 2001 Bartek Teodorczyk <barteo@barteo.net>
4    *
5    *  This library is free software; you can redistribute it and/or
6    *  modify it under the terms of the GNU Lesser General Public
7    *  License as published by the Free Software Foundation; either
8    *  version 2.1 of the License, or (at your option) any later version.
9    *
10   *  This library is distributed in the hope that it will be useful,
11   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   *  Lesser General Public License for more details.
14   *
15   *  You should have received a copy of the GNU Lesser General Public
16   *  License along with this library; if not, write to the Free Software
17   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   */
19   
20  package org.microemu.device.swt;
21  
22  import org.eclipse.swt.graphics.Color;
23  import org.eclipse.swt.graphics.RGB;
24  import org.microemu.app.ui.swt.ImageFilter;
25  import org.microemu.app.ui.swt.SwtDeviceComponent;
26  import org.microemu.device.DeviceFactory;
27  
28  
29  
30  public final class RGBImageFilter implements ImageFilter
31  {
32  
33    private double Rr, Rg, Rb;
34    private Color backgroundColor;
35    private Color foregroundColor;
36    
37  
38    public RGBImageFilter()
39  	{
40      backgroundColor = SwtDeviceComponent.getColor(new RGB(
41      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getBackgroundColor().getRed(),
42      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getBackgroundColor().getGreen(),
43      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getBackgroundColor().getBlue()));
44      foregroundColor = SwtDeviceComponent.getColor(new RGB(
45      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getForegroundColor().getRed(),
46      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getForegroundColor().getGreen(),
47      		((SwtDeviceDisplay) DeviceFactory.getDevice().getDeviceDisplay()).getForegroundColor().getBlue()));
48      Rr = foregroundColor.getRed() - backgroundColor.getRed();
49      Rg = foregroundColor.getGreen() - backgroundColor.getGreen();
50      Rb = foregroundColor.getBlue() - backgroundColor.getBlue();
51    }
52  
53  
54    public RGB filterRGB (int x, int y, RGB rgb)
55  	{
56      int r, g, b;
57  
58      if (Rr > 0) {
59        r = (int) (rgb.red * Rr) / 255 + backgroundColor.getRed();
60      } else {
61        r = (int) (rgb.red * -Rr) / 255 + foregroundColor.getRed();
62      }
63      if (Rr > 0) {
64        g = (int) (rgb.green * Rg) / 255 + backgroundColor.getGreen();
65      } else {
66        g = (int) (rgb.green * -Rg) / 255 + foregroundColor.getGreen();
67      }
68      if (Rr > 0) {
69        b = (int) (rgb.blue * Rb) / 255 + backgroundColor.getBlue();
70      } else {
71        b = (int) (rgb.blue * -Rb) / 255 + foregroundColor.getBlue();
72      }
73  
74      return new RGB(r, g, b);
75    }
76  
77  }