More AWT/Swing merge from GNU Classpath.

From-SVN: r56148

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

@@ -0,0 +1,157 @@
+/* RenderableImageOp.java -- 
+   Copyright (C) 2002 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.awt.image.renderable;
+
+import java.awt.RenderingHints;
+import java.awt.geom.AffineTransform;
+import java.awt.image.RenderedImage;
+import java.util.Vector;
+
+public class RenderableImageOp implements RenderableImage
+{
+  private final ContextualRenderedImageFactory crif;
+  private ParameterBlock block;
+
+  public RenderableImageOp(ContextualRenderedImageFactory crif,
+                           ParameterBlock block)
+  {
+    this.crif = crif;
+    this.block = (ParameterBlock) block.clone();
+  }
+
+  public Vector getSources()
+  {
+    if (block.sources == null)
+      return null;
+    int size = block.sources.size();
+    Vector v = new Vector();
+    for (int i = 0; i < size; i++)
+      {
+        Object o = block.sources.get(i);
+        if (o instanceof RenderableImage)
+          v.add(o);
+      }
+    return v;
+  }
+
+  public Object getProperty(String name)
+  {
+    return crif.getProperty(block, name);
+  }
+
+  public String[] getPropertyNames()
+  {
+    return crif.getPropertyNames();
+  }
+
+  public boolean isDynamic()
+  {
+    return crif.isDynamic();
+  }
+
+  public float getWidth()
+  {
+    return (float) crif.getBounds2D(block).getWidth();
+  }
+
+  public float getHeight()
+  {
+    return (float) crif.getBounds2D(block).getHeight();
+  }
+
+  public float getMinX()
+  {
+    return (float) crif.getBounds2D(block).getX();
+  }
+
+  public float getMinY()
+  {
+    return (float) crif.getBounds2D(block).getY();
+  }
+
+  public ParameterBlock setParameterBlock(ParameterBlock block)
+  {
+    ParameterBlock result = this.block;
+    this.block = (ParameterBlock) block.clone();
+    return result;
+  }
+
+  public ParameterBlock getParameterBlock()
+  {
+    return block;
+  }
+
+  public RenderedImage createScaledRendering(int w, int h,
+                                             RenderingHints hints)
+  {
+    if (w == 0)
+      if (h == 0)
+        throw new IllegalArgumentException();
+      else
+        w = Math.round(h * getWidth() / getHeight());
+    if (h == 0)
+      h = Math.round(w * getHeight() / getWidth());
+    AffineTransform xform = AffineTransform.getScaleInstance(w * getWidth(),
+                                                             h * getHeight());
+    return createRendering(new RenderContext(xform, hints));
+  }
+
+  public RenderedImage createDefaultRendering()
+  {
+    return createRendering(new RenderContext(new AffineTransform()));
+  }
+
+  public RenderedImage createRendering(RenderContext context)
+  {
+    ParameterBlock copy = (ParameterBlock) block.clone();
+    int i = block.sources.size();
+    while (--i >= 0)
+      {
+        Object o = block.sources.get(i);
+        if (o instanceof RenderableImage)
+          {
+            RenderableImage ri = (RenderableImage) o;
+            RenderContext rc = crif.mapRenderContext(i, context, block, ri);
+            copy.sources.set(i, ri.createRendering(rc));
+          }
+      }
+    // Now copy.sources should be only RenderedImages.
+    return crif.create(context, copy);
+  }
+} // class RenderableImageOp