toolchain/gcc/libjava/java/awt/image/renderable/RenderableImageOp.java

   1 /* RenderableImageOp.java --
   2    Copyright (C) 2002 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 java.awt.image.renderable;
  40
  41 import java.awt.RenderingHints;
  42 import java.awt.geom.AffineTransform;
  43 import java.awt.image.RenderedImage;
  44 import java.util.Vector;
  45
  46 public class RenderableImageOp implements RenderableImage
  47 {
  48   private final ContextualRenderedImageFactory crif;
  49   private ParameterBlock block;
  50
  51   public RenderableImageOp(ContextualRenderedImageFactory crif,
  52                            ParameterBlock block)
  53   {
  54     this.crif = crif;
  55     this.block = (ParameterBlock) block.clone();
  56   }
  57
  58   public Vector getSources()
  59   {
  60     if (block.sources == null)
  61       return null;
  62     int size = block.sources.size();
  63     Vector v = new Vector();
  64     for (int i = 0; i < size; i++)
  65       {
  66         Object o = block.sources.get(i);
  67         if (o instanceof RenderableImage)
  68           v.add(o);
  69       }
  70     return v;
  71   }
  72
  73   public Object getProperty(String name)
  74   {
  75     return crif.getProperty(block, name);
  76   }
  77
  78   public String[] getPropertyNames()
  79   {
  80     return crif.getPropertyNames();
  81   }
  82
  83   public boolean isDynamic()
  84   {
  85     return crif.isDynamic();
  86   }
  87
  88   public float getWidth()
  89   {
  90     return (float) crif.getBounds2D(block).getWidth();
  91   }
  92
  93   public float getHeight()
  94   {
  95     return (float) crif.getBounds2D(block).getHeight();
  96   }
  97
  98   public float getMinX()
  99   {
 100     return (float) crif.getBounds2D(block).getX();
 101   }
 102
 103   public float getMinY()
 104   {
 105     return (float) crif.getBounds2D(block).getY();
 106   }
 107
 108   public ParameterBlock setParameterBlock(ParameterBlock block)
 109   {
 110     ParameterBlock result = this.block;
 111     this.block = (ParameterBlock) block.clone();
 112     return result;
 113   }
 114
 115   public ParameterBlock getParameterBlock()
 116   {
 117     return block;
 118   }
 119
 120   public RenderedImage createScaledRendering(int w, int h,
 121                                              RenderingHints hints)
 122   {
 123     if (w == 0)
 124       if (h == 0)
 125         throw new IllegalArgumentException();
 126       else
 127         w = Math.round(h * getWidth() / getHeight());
 128     if (h == 0)
 129       h = Math.round(w * getHeight() / getWidth());
 130     AffineTransform xform = AffineTransform.getScaleInstance(w * getWidth(),
 131                                                              h * getHeight());
 132     return createRendering(new RenderContext(xform, hints));
 133   }
 134
 135   public RenderedImage createDefaultRendering()
 136   {
 137     return createRendering(new RenderContext(new AffineTransform()));
 138   }
 139
 140   public RenderedImage createRendering(RenderContext context)
 141   {
 142     ParameterBlock copy = (ParameterBlock) block.clone();
 143     int i = block.sources.size();
 144     while (--i >= 0)
 145       {
 146         Object o = block.sources.get(i);
 147         if (o instanceof RenderableImage)
 148           {
 149             RenderableImage ri = (RenderableImage) o;
 150             RenderContext rc = crif.mapRenderContext(i, context, block, ri);
 151             copy.sources.set(i, ri.createRendering(rc));
 152           }
 153       }
 154     // Now copy.sources should be only RenderedImages.
 155     return crif.create(context, copy);
 156   }
 157 } // class RenderableImageOp