Source for gnu.java.awt.peer.headless.HeadlessGraphicsEnvironment

   1: /* HeadlessGraphicsEnvironment.java -- A graphics environment for headless mode
   2:    Copyright (C) 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.headless;
  40: 
  41: import gnu.java.awt.java2d.RasterGraphics;
  42: 
  43: import java.awt.Font;
  44: import java.awt.Graphics2D;
  45: import java.awt.GraphicsDevice;
  46: import java.awt.GraphicsEnvironment;
  47: import java.awt.HeadlessException;
  48: import java.awt.image.BufferedImage;
  49: import java.awt.image.Raster;
  50: import java.lang.reflect.Constructor;
  51: import java.lang.reflect.Method;
  52: import java.util.Locale;
  53: 
  54: public class HeadlessGraphicsEnvironment
  55:     extends GraphicsEnvironment
  56: {
  57: 
  58:   public Graphics2D createGraphics(BufferedImage image)
  59:   {
  60:     Graphics2D g2d;
  61:     try
  62:       {
  63:         // Try to get a CairoGraphics (accellerated) when available. Do this
  64:         // via reflection to avoid having a hard compile time dependency.
  65:         Class cairoSurfaceCl =
  66:           Class.forName("gnu.java.awt.peer.gtk.CairoSurface");
  67:         Raster raster = image.getRaster();
  68:         if (cairoSurfaceCl.isInstance(raster))
  69:           {
  70:             Method getGraphicsM = cairoSurfaceCl.getMethod("getGraphics",
  71:                                                            new Class[0]);
  72:             g2d = (Graphics2D) getGraphicsM.invoke(raster, new Object[0]);
  73:           }
  74:         else
  75:           {
  76:             Class bigCl =
  77:               Class.forName("gnu.java.awt.peer.gtk.BufferedImageGraphics");
  78:             Constructor bigC =
  79:               bigCl.getConstructor(new Class[]{BufferedImage.class });
  80:             g2d = (Graphics2D) bigC.newInstance(new Object[]{ image});
  81:           }
  82:       }
  83:     catch (Exception ex)
  84:       {
  85:         g2d = new RasterGraphics(image.getRaster(), image.getColorModel());
  86:       }
  87:     return g2d;
  88:   }
  89: 
  90:   public Font[] getAllFonts()
  91:   {
  92:     // FIXME: Implement.
  93:     return null;
  94:   }
  95: 
  96:   public String[] getAvailableFontFamilyNames()
  97:   {
  98:     // FIXME: Implement.
  99:     return null;
 100:   }
 101: 
 102:   public String[] getAvailableFontFamilyNames(Locale l)
 103:   {
 104:     // FIXME: Implement.
 105:     return null;
 106:   }
 107: 
 108:   public GraphicsDevice getDefaultScreenDevice()
 109:   {
 110:     throw new HeadlessException();
 111:   }
 112: 
 113:   public GraphicsDevice[] getScreenDevices()
 114:   {
 115:     throw new HeadlessException();
 116:   }
 117: 
 118: }