1 /*
2  * $RCSfile: MlibLogRIF.java,v $
3  *
4  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5  *
6  * Use is subject to license terms.
7  *
8  * $Revision: 1.1 $
9  * $Date: 2005/02/11 04:55:58 $
10  * $State: Exp $
11  */
12 package com.lightcrafts.media.jai.mlib;
13 import java.awt.RenderingHints;
14 import java.awt.image.RenderedImage;
15 import java.awt.image.renderable.ParameterBlock;
16 import java.awt.image.renderable.RenderedImageFactory;
17 import com.lightcrafts.mediax.jai.ImageLayout;
18 
19 import com.lightcrafts.media.jai.opimage.RIFUtil;
20 
21 /**
22  * A <code>RIF</code> supporting the "Log" operation in the
23  * rendered image mode using MediaLib.
24  *
25  * @see com.lightcrafts.mediax.jai.operator.LogDescriptor
26  * @see MlibLogOpImage
27  *
28  */
29 public class MlibLogRIF implements RenderedImageFactory {
30 
31     /** Constructor. */
MlibLogRIF()32     public MlibLogRIF() {}
33 
34     /**
35      * Creates a new instance of <code>MlibLogOpImage</code> in
36      * the rendered image mode.
37      *
38      * @param args  The source image.
39      * @param hints  May contain rendering hints and destination image layout.
40      */
create(ParameterBlock args, RenderingHints hints)41     public RenderedImage create(ParameterBlock args,
42                                 RenderingHints hints) {
43         /* Get ImageLayout and TileCache from RenderingHints. */
44         ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
45 
46 
47         if (!MediaLibAccessor.isMediaLibCompatible(args, layout) ||
48             !MediaLibAccessor.hasSameNumBands(args, layout)) {
49             return null;
50         }
51 
52         return new MlibLogOpImage(args.getRenderedSource(0),
53                                   hints, layout);
54     }
55 }
56