001/* RenderableImageOp.java -- 
002   Copyright (C) 2002 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.awt.image.renderable;
040
041import java.awt.RenderingHints;
042import java.awt.geom.AffineTransform;
043import java.awt.image.RenderedImage;
044import java.util.Vector;
045
046public class RenderableImageOp implements RenderableImage
047{
048  private final ContextualRenderedImageFactory crif;
049  private ParameterBlock block;
050
051  public RenderableImageOp(ContextualRenderedImageFactory crif,
052                           ParameterBlock block)
053  {
054    this.crif = crif;
055    this.block = (ParameterBlock) block.clone();
056  }
057
058  public Vector<RenderableImage> getSources()
059  {
060    if (block.sources == null)
061      return null;
062    int size = block.sources.size();
063    Vector v = new Vector();
064    for (int i = 0; i < size; i++)
065      {
066        Object o = block.sources.get(i);
067        if (o instanceof RenderableImage)
068          v.add(o);
069      }
070    return v;
071  }
072
073  public Object getProperty(String name)
074  {
075    return crif.getProperty(block, name);
076  }
077
078  public String[] getPropertyNames()
079  {
080    return crif.getPropertyNames();
081  }
082
083  public boolean isDynamic()
084  {
085    return crif.isDynamic();
086  }
087
088  public float getWidth()
089  {
090    return (float) crif.getBounds2D(block).getWidth();
091  }
092
093  public float getHeight()
094  {
095    return (float) crif.getBounds2D(block).getHeight();
096  }
097
098  public float getMinX()
099  {
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