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

   1: /* VolatileImageGraphics.java
   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.gtk;
  40: 
  41: import java.awt.Graphics;
  42: import java.awt.GraphicsConfiguration;
  43: import java.awt.Image;
  44: import java.awt.geom.Rectangle2D;
  45: import java.awt.image.ImageObserver;
  46: 
  47: public class VolatileImageGraphics extends ComponentGraphics
  48: {
  49:   private GtkVolatileImage owner;
  50: 
  51:   public VolatileImageGraphics(GtkVolatileImage img)
  52:   {
  53:     this.owner = img;
  54:     cairo_t = initFromVolatile( owner.nativePointer, img.width, img.height );
  55:     setup( cairo_t );
  56:   }
  57: 
  58:   private VolatileImageGraphics(VolatileImageGraphics copy)
  59:   {
  60:     this.owner = copy.owner;
  61:     cairo_t = initFromVolatile(owner.nativePointer, owner.width, owner.height);
  62:     copy( copy, cairo_t );
  63:   }
  64: 
  65:   public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy)
  66:   {
  67:     owner.copyArea(x, y, width, height, dx, dy);
  68:   }
  69: 
  70:   public GraphicsConfiguration getDeviceConfiguration()
  71:   {
  72:     return owner.component.getGraphicsConfiguration();
  73:   }
  74: 
  75:   public Graphics create()
  76:   {
  77:     return new VolatileImageGraphics( this );
  78:   }
  79: 
  80: 
  81:   public boolean drawImage(Image img, int x, int y, ImageObserver observer)
  82:   {
  83:     if( img instanceof GtkVolatileImage )
  84:       {
  85:     owner.drawVolatile( ((GtkVolatileImage)img).nativePointer, 
  86:                 x, y,
  87:                 ((GtkVolatileImage)img).width, 
  88:                 ((GtkVolatileImage)img).height );
  89:     return true;
  90:       }      
  91:     return super.drawImage( img, x, y, observer );
  92:   }
  93:   
  94:   public boolean drawImage(Image img, int x, int y, int width, int height,
  95:                            ImageObserver observer)
  96:   {
  97:     if( img instanceof GtkVolatileImage )
  98:       {
  99:     owner.drawVolatile( ((GtkVolatileImage)img).nativePointer, 
 100:                 x, y, width, height );
 101:     return true;
 102:       }      
 103:     return super.drawImage( img, x, y, width, height, observer );
 104:   }
 105: 
 106:   protected Rectangle2D getRealBounds()
 107:   {
 108:     return new Rectangle2D.Double(0, 0, owner.width, owner.height);
 109:   }
 110: }