libjava/javax/imageio/IIOParam.java

   1 /* IIOParam.java --
   2    Copyright (C) 2004  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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 javax.imageio;
  40
  41 import java.awt.Point;
  42 import java.awt.Rectangle;
  43
  44 /**
  45  * @author Michael Koch (konqueror@gmx.de)
  46  */
  47 public abstract class IIOParam
  48 {
  49   protected IIOParamController controller;
  50   protected IIOParamController defaultController;
  51   protected Point destinationOffset = new Point(0, 0);
  52   protected ImageTypeSpecifier destinationType;
  53   protected int[] sourceBands;
  54   protected Rectangle sourceRegion;
  55   protected int sourceXSubsampling;
  56   protected int sourceYSubsampling;
  57   protected int subsamplingXOffset;
  58   protected int subsamplingYOffset;
  59
  60   /**
  61    * Initializes an <code>IIOParam</code> object.
  62    */
  63   protected IIOParam()
  64   {
  65     // Do nothing here.
  66   }
  67
  68   public boolean activateController()
  69   {
  70     if (controller == null)
  71       return false;
  72
  73     return controller.activate(this);
  74   }
  75
  76   public IIOParamController getController()
  77   {
  78     return controller;
  79   }
  80
  81   public IIOParamController getDefaultController()
  82   {
  83     return defaultController;
  84   }
  85
  86   public Point getDestinationOffset()
  87   {
  88     return destinationOffset;
  89   }
  90
  91   public ImageTypeSpecifier getDestinationType()
  92   {
  93     return destinationType;
  94   }
  95
  96   public int[] getSourceBands()
  97   {
  98     return sourceBands;
  99   }
 100
 101   public Rectangle getSourceRegion()
 102   {
 103     return sourceRegion;
 104   }
 105
 106   public int getSourceXSubsampling()
 107   {
 108     return sourceXSubsampling;
 109   }
 110
 111   public int getSourceYSubsampling()
 112   {
 113     return sourceYSubsampling;
 114   }
 115
 116   public int getSubsamplingXOffset()
 117   {
 118     return subsamplingXOffset;
 119   }
 120
 121   public int getSubsamplingYOffset()
 122   {
 123     return subsamplingYOffset;
 124   }
 125
 126   public boolean hasController()
 127   {
 128     return getController() != null;
 129   }
 130
 131   public void setController(IIOParamController controller)
 132   {
 133     this.controller = controller;
 134   }
 135
 136   public void setDestinationOffset(Point destinationOffset)
 137   {
 138     if (destinationOffset == null)
 139       throw new IllegalArgumentException("destinationOffset is null");
 140
 141     this.destinationOffset = destinationOffset;
 142   }
 143
 144   public void setSourceRegion(Rectangle sourceRegion)
 145   {
 146     if (sourceRegion != null
 147         && (sourceRegion.x < 0
 148             || sourceRegion.y < 0
 149             || sourceRegion.width <= 0
 150             || sourceRegion.height <= 0))
 151       throw new IllegalArgumentException("illegal source region");
 152
 153     // FIXME: Throw IllegalStateException.
 154
 155     this.sourceRegion = sourceRegion;
 156   }
 157 }