libjava/classpath/gnu/java/awt/java2d/RasterGraphics.java

   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 }