001 /* RenderableImageOp.java --
002 Copyright (C) 2002 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package java.awt.image.renderable;
040
041 import java.awt.RenderingHints;
042 import java.awt.geom.AffineTransform;
043 import java.awt.image.RenderedImage;
044 import java.util.Vector;
045
046 public 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