1 /*
   2  * Copyright (c) 2003, 2008, 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 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 public class XCustomCursor extends X11CustomCursor {
  39 
  40     public XCustomCursor(Image cursor, Point hotSpot, String name)
  41       throws IndexOutOfBoundsException {
  42         super(cursor, hotSpot, name);
  43     }
  44 
  45     /**
  46      * Returns the supported cursor size
  47      */
  48     static Dimension getBestCursorSize(int preferredWidth, int preferredHeight) {
  49 
  50         // Fix for bug 4212593 The Toolkit.createCustomCursor does not
  51         //                     check absence of the image of cursor
  52         // We use XQueryBestCursor which accepts unsigned ints to obtain
  53         // the largest cursor size that could be dislpayed
  54         //Dimension d = new Dimension(Math.abs(preferredWidth), Math.abs(preferredHeight));
  55         Dimension d;
  56 
  57         XToolkit.awtLock();
  58         try {
  59             long display = XToolkit.getDisplay();
  60             long root_window = XlibWrapper.RootWindow(display,
  61                     XlibWrapper.DefaultScreen(display));
  62 
  63             XlibWrapper.XQueryBestCursor(display,root_window, Math.abs(preferredWidth),Math.abs(preferredHeight),XlibWrapper.larg1,XlibWrapper.larg2);
  64             d = new Dimension(XlibWrapper.unsafe.getInt(XlibWrapper.larg1),XlibWrapper.unsafe.getInt(XlibWrapper.larg2));
  65         }
  66         finally {
  67             XToolkit.awtUnlock();
  68         }
  69         return d;
  70     }
  71 
  72     protected void createCursor(byte[] xorMask, byte[] andMask,
  73                                 int width, int height,
  74                                 int fcolor, int bcolor,
  75                                 int xHotSpot, int yHotSpot)
  76     {
  77         XToolkit.awtLock();
  78         try {
  79             long display = XToolkit.getDisplay();
  80             long root_window = XlibWrapper.RootWindow(display,
  81                     XlibWrapper.DefaultScreen(display));
  82 
  83             long colormap = XToolkit.getDefaultXColormap();
  84             XColor fore_color = new XColor();
  85 
  86             fore_color.set_flags((byte) (XConstants.DoRed | XConstants.DoGreen | XConstants.DoBlue));
  87             fore_color.set_red((short)(((fcolor >> 16) & 0x000000ff) << 8));
  88             fore_color.set_green((short) (((fcolor >> 8) & 0x000000ff) << 8));
  89             fore_color.set_blue((short)(((fcolor >> 0) & 0x000000ff) << 8));
  90 
  91             XlibWrapper.XAllocColor(display,colormap,fore_color.pData);
  92 
  93 
  94             XColor back_color = new XColor();
  95             back_color.set_flags((byte) (XConstants.DoRed | XConstants.DoGreen | XConstants.DoBlue));
  96 
  97             back_color.set_red((short) (((bcolor >> 16) & 0x000000ff) << 8));
  98             back_color.set_green((short) (((bcolor >> 8) & 0x000000ff) << 8));
  99             back_color.set_blue((short) (((bcolor >> 0) & 0x000000ff) << 8));
 100 
 101             XlibWrapper.XAllocColor(display,colormap,back_color.pData);
 102 
 103 
 104             long nativeXorMask = Native.toData(xorMask);
 105             long source = XlibWrapper.XCreateBitmapFromData(display,root_window,nativeXorMask,width,height);
 106 
 107             long nativeAndMask = Native.toData(andMask);
 108             long mask =  XlibWrapper.XCreateBitmapFromData(display,root_window,nativeAndMask,width,height);
 109 
 110             long cursor = XlibWrapper.XCreatePixmapCursor(display,source,mask,fore_color.pData,back_color.pData,xHotSpot,yHotSpot);
 111 
 112             XlibWrapper.unsafe.freeMemory(nativeXorMask);
 113             XlibWrapper.unsafe.freeMemory(nativeAndMask);
 114             XlibWrapper.XFreePixmap(display,source);
 115             XlibWrapper.XFreePixmap(display,mask);
 116             back_color.dispose();
 117             fore_color.dispose();
 118 
 119             XGlobalCursorManager.setPData(this,cursor);
 120         }
 121         finally {
 122             XToolkit.awtUnlock();
 123         }
 124 
 125     }
 126 }