Source for gnu.java.awt.peer.gtk.GdkGraphicsEnvironment

   1: /* GdkGraphicsEnvironment.java -- information about the graphics environment
   2:    Copyright (C) 2004, 2005, 2006  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.awt.peer.gtk;
  40: 
  41: import java.awt.Font;
  42: import java.awt.Graphics2D;
  43: import java.awt.GraphicsDevice;
  44: import java.awt.GraphicsEnvironment;
  45: import java.awt.HeadlessException;
  46: import java.awt.image.BufferedImage;
  47: import java.awt.image.DataBuffer;
  48: import java.util.Locale;
  49: 
  50: public class GdkGraphicsEnvironment extends GraphicsEnvironment
  51: {
  52:   private final int native_state = GtkGenericPeer.getUniqueInteger ();
  53:   
  54:   private GdkScreenGraphicsDevice defaultDevice;
  55:   
  56:   private GdkScreenGraphicsDevice[] devices;
  57:   
  58:   static
  59:   {
  60:     System.loadLibrary("gtkpeer");
  61: 
  62:     initStaticState ();
  63:   }
  64:   
  65:   static native void initStaticState();
  66:   
  67:   public GdkGraphicsEnvironment ()
  68:   {
  69:     nativeInitState();
  70:   }
  71:   
  72:   native void nativeInitState();
  73: 
  74:   public GraphicsDevice[] getScreenDevices ()
  75:   {
  76:     if (devices == null)
  77:       {
  78:         devices = nativeGetScreenDevices();
  79:       }
  80:     
  81:     return (GraphicsDevice[]) devices.clone();
  82:   }
  83:   
  84:   private native GdkScreenGraphicsDevice[] nativeGetScreenDevices();
  85: 
  86:   public GraphicsDevice getDefaultScreenDevice ()
  87:   {
  88:     if (GraphicsEnvironment.isHeadless ())
  89:       throw new HeadlessException ();
  90:     
  91:     synchronized (GdkGraphicsEnvironment.class)
  92:       {
  93:         if (defaultDevice == null)
  94:           {
  95:             defaultDevice = nativeGetDefaultScreenDevice();
  96:           }
  97:       }
  98:     
  99:     return defaultDevice;
 100:   }
 101:   
 102:   private native GdkScreenGraphicsDevice nativeGetDefaultScreenDevice();
 103: 
 104:   public Graphics2D createGraphics (BufferedImage image)
 105:   {
 106:     DataBuffer db = image.getRaster().getDataBuffer();
 107:     if(db instanceof CairoSurface)
 108:       return ((CairoSurface)db).getGraphics();
 109: 
 110:     return new BufferedImageGraphics( image );
 111:   }
 112:   
 113:   private native int nativeGetNumFontFamilies();
 114:   private native void nativeGetFontFamilies(String[] family_names);
 115: 
 116:   public Font[] getAllFonts ()
 117:   {
 118:     throw new java.lang.UnsupportedOperationException ();
 119:   }
 120: 
 121:   public String[] getAvailableFontFamilyNames ()
 122:   {
 123:     String[] family_names;
 124:     int array_size;
 125: 
 126:     array_size = nativeGetNumFontFamilies();
 127:     family_names = new String[array_size];
 128: 
 129:     nativeGetFontFamilies(family_names);
 130:     return family_names;
 131:   }
 132: 
 133:   public String[] getAvailableFontFamilyNames (Locale l)
 134:   {
 135:     throw new java.lang.UnsupportedOperationException ();
 136:   }
 137: 
 138:   /**
 139:    * Used by GtkMouseInfoPeer.
 140:    */ 
 141:   native int[] getMouseCoordinates();
 142: }