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

   1: /* ComponentGraphicsCopy.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.Color;
  42: import java.awt.Image;
  43: import java.awt.Rectangle;
  44: import java.awt.Shape;
  45: import java.awt.font.GlyphVector;
  46: import java.awt.geom.AffineTransform;
  47: import java.awt.image.RenderedImage;
  48: import java.awt.image.ImageObserver;
  49: 
  50: /**
  51:  * Implementation of Graphics2D for Components for servers which
  52:  * do not have xrender.
  53:  *
  54:  * A mirrored GtkImage of the component is stored in memory
  55:  * and copied back. Yay.
  56:  */
  57: public class ComponentGraphicsCopy extends CairoSurfaceGraphics
  58: {
  59:   private GtkComponentPeer component;
  60: 
  61:   /**
  62:    * GtkImage sharing its data buffer with this Cairo surface.
  63:    */
  64:   private GtkImage gtkimage;
  65: 
  66:   private int width, height;
  67: 
  68:   native void getPixbuf( GtkComponentPeer component, GtkImage image );
  69: 
  70:   native void copyPixbuf( GtkComponentPeer component, GtkImage image,
  71:                           int x, int y, int w, int h );
  72: 
  73:   public ComponentGraphicsCopy(int width, int height,
  74:                                GtkComponentPeer component)
  75:   {
  76:     super( new CairoSurface( width, height ) );
  77:     this.component = component;
  78:     this.width = width;
  79:     this.height = height;
  80:     gtkimage = surface.getGtkImage();
  81:     getPixbuf( component, gtkimage );
  82:   }
  83: 
  84:   /**
  85:    * Overloaded methods that do actual drawing need to enter the gdk threads
  86:    * and also do certain things before and after.
  87:    */
  88:   public void draw(Shape s)
  89:   {
  90:     super.draw(s);
  91:     Rectangle r = s.getBounds();
  92:     copyPixbuf(component, gtkimage, r.x, r.y, r.width, r.height);
  93:   }
  94: 
  95:   public void fill(Shape s)
  96:   {
  97:     super.fill(s);
  98:     Rectangle r = s.getBounds();
  99:     copyPixbuf(component, gtkimage, r.x, r.y, r.width, r.height);
 100:   }
 101: 
 102:   public void drawRenderedImage(RenderedImage image, AffineTransform xform)
 103:   {
 104:     super.drawRenderedImage(image, xform);
 105:     copyPixbuf(component, gtkimage, 0, 0, width, height);
 106:   }
 107: 
 108:   protected boolean drawImage(Image img, AffineTransform xform,
 109:                               Color bgcolor, ImageObserver obs)
 110:   {
 111:     boolean rv = super.drawImage(img, xform, bgcolor, obs);
 112:     copyPixbuf(component, gtkimage, 0, 0, width, height);
 113:     return rv;
 114:   }
 115: 
 116:   public void drawGlyphVector(GlyphVector gv, float x, float y)
 117:   {
 118:     super.drawGlyphVector(gv, x, y);
 119:     Rectangle r = gv.getPixelBounds(getFontRenderContext(), x , y);
 120:     copyPixbuf(component, gtkimage, r.x, r.y, r.width, r.height);
 121:   }
 122: }