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

   1: /* CairoSurfaceGraphics.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.GraphicsEnvironment;
  43: import java.awt.GraphicsConfiguration;
  44: import java.awt.geom.Rectangle2D;
  45: 
  46: /**
  47:  * Implementation of Graphics2D on a Cairo surface.
  48:  */
  49: public class CairoSurfaceGraphics extends CairoGraphics2D
  50: {
  51:   protected CairoSurface surface;
  52:   private long cairo_t;
  53:   
  54:   /**
  55:    * Create a graphics context from a cairo surface
  56:    */
  57:   public CairoSurfaceGraphics(CairoSurface surface)
  58:   {
  59:     this.surface = surface;
  60:     cairo_t = surface.newCairoContext();
  61:     setup( cairo_t );
  62:   }
  63: 
  64:   /**
  65:    * Creates another context from a surface.
  66:    * Used by create().
  67:    */ 
  68:   private CairoSurfaceGraphics(CairoSurfaceGraphics copyFrom)
  69:   {
  70:     surface = copyFrom.surface;
  71:     cairo_t = surface.newCairoContext();
  72:     copy( copyFrom, cairo_t );
  73:   }
  74:   
  75:   public Graphics create()
  76:   {
  77:     return new CairoSurfaceGraphics(this);
  78:   }
  79:   
  80:   public GraphicsConfiguration getDeviceConfiguration()
  81:   {
  82:     return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
  83:   }
  84:   
  85:   protected Rectangle2D getRealBounds()
  86:   {
  87:     return new Rectangle2D.Double(0.0, 0.0, surface.width, surface.height);
  88:   }
  89: 
  90:   public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy)
  91:   {
  92:     surface.copyAreaNative(x, y, width, height, dx, dy, surface.width);
  93:   }
  94: }