Source for gnu.java.awt.java2d.RasterGraphics

   1: /* RasterGraphics.java -- A Graphics2D impl for Rasters
   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.java2d;
  40: 
  41: import java.awt.GraphicsConfiguration;
  42: import java.awt.Rectangle;
  43: import java.awt.image.ColorModel;
  44: import java.awt.image.WritableRaster;
  45: 
  46: /**
  47:  * A Graphics2D implementation that operates on Raster objects. This is
  48:  * primarily used for BufferedImages, but can theoretically be used on
  49:  * arbitrary WritableRasters.
  50:  *
  51:  * @author Roman Kennke (kennke@aicas.com)
  52:  */
  53: public class RasterGraphics
  54:   extends AbstractGraphics2D
  55: {
  56: 
  57:   /**
  58:    * The raster on which we operate.
  59:    */
  60:   private WritableRaster raster;
  61: 
  62:   /**
  63:    * The color model of this Graphics instance.
  64:    */
  65:   private ColorModel colorModel;
  66: 
  67:   public RasterGraphics(WritableRaster r, ColorModel cm)
  68:   {
  69:     super();
  70:     raster = r;
  71:     colorModel = cm;
  72:     init();
  73:   }
  74: 
  75:   @Override
  76:   public void renderScanline(int y, ScanlineCoverage c)
  77:   {
  78:     if (y >= getDeviceBounds().width)
  79:       return;
  80: 
  81:     super.renderScanline(y, c);
  82:   }
  83: 
  84:   /**
  85:    * Returns the color model of this Graphics object.
  86:    *
  87:    * @return the color model of this Graphics object
  88:    */
  89:   protected ColorModel getColorModel()
  90:   {
  91:     return colorModel;
  92:   }
  93: 
  94:   /**
  95:    * Returns a WritableRaster that is used by this class to perform the
  96:    * rendering in. It is not necessary that the target surface immediately
  97:    * reflects changes in the raster. Updates to the raster are notified via
  98:    * {@link AbstractGraphics2D#updateRaster}.
  99:    *
 100:    * @return the destination raster
 101:    */
 102:   protected WritableRaster getDestinationRaster()
 103:   {
 104:     return raster;
 105:   }
 106: 
 107:   public GraphicsConfiguration getDeviceConfiguration()
 108:   {
 109:     // TODO Auto-generated method stub
 110:     return null;
 111:   }
 112: 
 113:   @Override
 114:   protected Rectangle getDeviceBounds()
 115:   {
 116:     return this.raster.getBounds();
 117:   }
 118: }