01: /*
02: * $RCSfile: MlibBandSelectRIF.java,v $
03: *
04: * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
05: *
06: * Use is subject to license terms.
07: *
08: * $Revision: 1.1 $
09: * $Date: 2005/02/11 04:55:51 $
10: * $State: Exp $
11: */
12: package com.sun.media.jai.mlib;
13:
14: import java.awt.RenderingHints;
15: import java.awt.image.RenderedImage;
16: import java.awt.image.renderable.ParameterBlock;
17: import java.awt.image.renderable.RenderedImageFactory;
18: import javax.media.jai.ImageLayout;
19: import java.util.Map;
20: import com.sun.media.jai.opimage.RIFUtil;
21:
22: /**
23: * A <code>RIF</code> supporting the "BandSelect" operation in the
24: * rendered image mode using MediaLib.
25: *
26: * @see javax.media.jai.operator.BandSelectDescriptor
27: * @see MlibBandSelectOpImage
28: *
29: */
30: public class MlibBandSelectRIF implements RenderedImageFactory {
31:
32: /** Constructor. */
33: public MlibBandSelectRIF() {
34: }
35:
36: /**
37: * Creates a new instance of <code>MlibBandSelectOpImage</code> in
38: * the rendered image mode.
39: *
40: * @param args The source image and the band indices.
41: * @param hints May contain rendering hints and destination image layout.
42: */
43: public RenderedImage create(ParameterBlock args,
44: RenderingHints hints) {
45: // Get ImageLayout and TileCache from RenderingHints.
46: ImageLayout layout = RIFUtil.getImageLayoutHint(hints);
47:
48: if (!MediaLibAccessor.isMediaLibCompatible(args, layout)) {
49: return null;
50: }
51:
52: int[] bandIndices = (int[]) args.getObjectParameter(0);
53:
54: // If the band selection is not monotonically increasing
55: // fall back to Java code as mediaLib does not support this.
56: for (int i = 1; i < bandIndices.length; i++) {
57: if (bandIndices[i] <= bandIndices[i - 1]) {
58: return null;
59: }
60: }
61:
62: return new MlibBandSelectOpImage(args.getRenderedSource(0),
63: hints, layout, bandIndices);
64: }
65: }
|