1    package graphics.raytracers.rmiRaytracer.raytracer; 
2     
3    import java.awt.*; 
4    import java.awt.image.ColorModel; 
5    import java.awt.image.MemoryImageSource; 
6     
7    class ImageCanvas extends Canvas { 
8     
9        Image img; 
10    
11       DoImageClientManager dicm = new DoImageClientManager(); 
12    
13       public ImageCanvas( 
14               Dimension band, int size) { 
15           DoImageInterface di = dicm.getNextProxy(); 
16           //       DoImageClient.getNextInterface(); 
17    
18           try { 
19               computeTheImage(di, size, band); 
20           } catch (java.rmi.RemoteException e) { 
21               e.printStackTrace(); 
22           } 
23       } 
24    
25       private void computeTheImage(DoImageInterface di, int size, Dimension band) 
26               throws java.rmi.RemoteException { 
27           if (di == null) { 
28               System.out.println("ERROR:ImageCanvas di==null"); 
29               return; 
30           } 
31           di.setSize(new Dimension(size, size)); 
32           di.setBand(band); 
33           di.doTheWork(); 
34           int pix[][] = di.getSubPixels(); 
35           img = int2Image(pix); 
36       } 
37    
38       public static Image int2Image(int i[][]) { 
39           Toolkit tk = Toolkit.getDefaultToolkit(); 
40           int width = i.length; 
41           int height = i[0].length; 
42           int pels[] = new int[width * height]; 
43           for (int x = 0; x < width; x++) 
44               for (int y = 0; y < height; y++) 
45                   pels[x + y * width] = i[x][y]; 
46           return tk.createImage( 
47                   new MemoryImageSource(width, height, 
48                           ColorModel.getRGBdefault(), 
49                           pels, 0, width)); 
50       } 
51    
52       public ImageCanvas(Image _img) { 
53           img = _img; 
54       } 
55    
56       public void paint(Graphics g) { 
57           Dimension d = getSize(); 
58           if (img != null) 
59               g.drawImage(img, 0, 0, 
60                       d.width, d.height, this); 
61       } 
62    
63       public Image getImage() { 
64           return img; 
65       } 
66    
67       public void setImage(Image img) { 
68           this.img = img; 
69           repaint(); 
70       } 
71   } 
72