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25 
26 package sun.awt.X11;
27 
28 import sun.awt.X11CustomCursor;
29 import java.awt.*;
30 
31 /**
32  * A class to encapsulate a custom image-based cursor.
33  *
34  * @see Component#setCursor
35  * @author      Thomas Ball
36  * @author      Bino George
37  */
38 @SuppressWarnings("serial") // JDK-implementation class
39 public class XCustomCursor extends X11CustomCursor {
40 
XCustomCursor(Image cursor, Point hotSpot, String name)41     public XCustomCursor(Image cursor, Point hotSpot, String name)
42       throws IndexOutOfBoundsException {
43         super(cursor, hotSpot, name);
44     }
45 
46     /**
47      * Returns the supported cursor size
48      */
getBestCursorSize(int preferredWidth, int preferredHeight)49     static Dimension getBestCursorSize(int preferredWidth, int preferredHeight) {
50 
51         // Fix for bug 4212593 The Toolkit.createCustomCursor does not
52         //                     check absence of the image of cursor
53         // We use XQueryBestCursor which accepts unsigned ints to obtain
54         // the largest cursor size that could be dislpayed
55         //Dimension d = new Dimension(Math.abs(preferredWidth), Math.abs(preferredHeight));
56         Dimension d;
57 
58         XToolkit.awtLock();
59         try {
60             long display = XToolkit.getDisplay();
61             long root_window = XlibWrapper.RootWindow(display,
62                     XlibWrapper.DefaultScreen(display));
63 
64             XlibWrapper.XQueryBestCursor(display,root_window, Math.abs(preferredWidth),Math.abs(preferredHeight),XlibWrapper.larg1,XlibWrapper.larg2);
65             d = new Dimension(XlibWrapper.unsafe.getInt(XlibWrapper.larg1),XlibWrapper.unsafe.getInt(XlibWrapper.larg2));
66             if (preferredWidth > 0 && preferredHeight > 0) {
67                 d.width = Math.min(d.width, preferredWidth);
68                 d.height = Math.min(d.height, preferredHeight);
69             }
70         }
71         finally {
72             XToolkit.awtUnlock();
73         }
74         return d;
75     }
76 
createCursor(byte[] xorMask, byte[] andMask, int width, int height, int fcolor, int bcolor, int xHotSpot, int yHotSpot)77     protected void createCursor(byte[] xorMask, byte[] andMask,
78                                 int width, int height,
79                                 int fcolor, int bcolor,
80                                 int xHotSpot, int yHotSpot)
81     {
82         XToolkit.awtLock();
83         try {
84             long display = XToolkit.getDisplay();
85             long root_window = XlibWrapper.RootWindow(display,
86                     XlibWrapper.DefaultScreen(display));
87 
88             long colormap = XToolkit.getDefaultXColormap();
89             XColor fore_color = new XColor();
90 
91             fore_color.set_flags((byte) (XConstants.DoRed | XConstants.DoGreen | XConstants.DoBlue));
92             fore_color.set_red((short)(((fcolor >> 16) & 0x000000ff) << 8));
93             fore_color.set_green((short) (((fcolor >> 8) & 0x000000ff) << 8));
94             fore_color.set_blue((short)(((fcolor >> 0) & 0x000000ff) << 8));
95 
96             XlibWrapper.XAllocColor(display,colormap,fore_color.pData);
97 
98 
99             XColor back_color = new XColor();
100             back_color.set_flags((byte) (XConstants.DoRed | XConstants.DoGreen | XConstants.DoBlue));
101 
102             back_color.set_red((short) (((bcolor >> 16) & 0x000000ff) << 8));
103             back_color.set_green((short) (((bcolor >> 8) & 0x000000ff) << 8));
104             back_color.set_blue((short) (((bcolor >> 0) & 0x000000ff) << 8));
105 
106             XlibWrapper.XAllocColor(display,colormap,back_color.pData);
107 
108 
109             long nativeXorMask = Native.toData(xorMask);
110             long source = XlibWrapper.XCreateBitmapFromData(display,root_window,nativeXorMask,width,height);
111 
112             long nativeAndMask = Native.toData(andMask);
113             long mask =  XlibWrapper.XCreateBitmapFromData(display,root_window,nativeAndMask,width,height);
114 
115             long cursor = XlibWrapper.XCreatePixmapCursor(display,source,mask,fore_color.pData,back_color.pData,xHotSpot,yHotSpot);
116 
117             XlibWrapper.unsafe.freeMemory(nativeXorMask);
118             XlibWrapper.unsafe.freeMemory(nativeAndMask);
119             XlibWrapper.XFreePixmap(display,source);
120             XlibWrapper.XFreePixmap(display,mask);
121             back_color.dispose();
122             fore_color.dispose();
123 
124             XGlobalCursorManager.setPData(this,cursor);
125         }
126         finally {
127             XToolkit.awtUnlock();
128         }
129 
130     }
131 }
132