01: /*
02: * $RCSfile: FilteredSubsampleRIF.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 04:56:27 $
10: * $State: Exp $
11: */package com.sun.media.jai.opimage;
12:
13: import java.awt.RenderingHints;
14: import java.awt.image.RenderedImage;
15: import java.awt.image.SampleModel;
16: import java.awt.image.DataBuffer;
17: import java.awt.image.MultiPixelPackedSampleModel;
18: import java.awt.image.renderable.RenderedImageFactory;
19: import java.awt.image.renderable.ParameterBlock;
20: import java.util.Map;
21: import javax.media.jai.BorderExtender;
22: import javax.media.jai.ImageLayout;
23: import javax.media.jai.Interpolation;
24: import javax.media.jai.InterpolationNearest;
25: import javax.media.jai.InterpolationBilinear;
26: import javax.media.jai.InterpolationBicubic;
27: import javax.media.jai.InterpolationBicubic2;
28: import javax.media.jai.JAI;
29:
30: /**
31: * <p> Class implementing the RIF interface for the FilteredSubsample
32: * operator. An instance of this class should be registered with the
33: * OperationRegistry with operation name "FilteredSubsample."
34: */
35: public class FilteredSubsampleRIF implements RenderedImageFactory {
36:
37: /** <p> Default constructor (there is no input). */
38: public FilteredSubsampleRIF() {
39: }
40:
41: /**
42: * <p> Creates a new instance of SubsampleOpImage in the rendered layer.
43: * This method satisfies the implementation of RIF.
44: *
45: * @param paramBlock The source image, the X and Y scale factors.
46: * @param renderHints RenderingHints.
47: */
48: public RenderedImage create(ParameterBlock paramBlock,
49: RenderingHints renderHints) {
50: RenderedImage source = paramBlock.getRenderedSource(0);
51:
52: BorderExtender extender = renderHints == null ? null
53: : (BorderExtender) renderHints
54: .get(JAI.KEY_BORDER_EXTENDER);
55: ImageLayout layout = renderHints == null ? null
56: : (ImageLayout) renderHints.get(JAI.KEY_IMAGE_LAYOUT);
57:
58: int scaleX = paramBlock.getIntParameter(0);
59: int scaleY = paramBlock.getIntParameter(1);
60: float[] qsFilter = (float[]) paramBlock.getObjectParameter(2);
61: Interpolation interp = (Interpolation) paramBlock
62: .getObjectParameter(3);
63:
64: // check if binary and interpolation type allowed
65: SampleModel sm = source.getSampleModel();
66: int dataType = sm.getDataType();
67:
68: // Determine the interpolation type, if not supported throw exception
69: boolean validInterp = (interp instanceof InterpolationNearest)
70: || (interp instanceof InterpolationBilinear)
71: || (interp instanceof InterpolationBicubic)
72: || (interp instanceof InterpolationBicubic2);
73:
74: if (!validInterp)
75: throw new IllegalArgumentException(JaiI18N
76: .getString("FilteredSubsample3"));
77:
78: return new FilteredSubsampleOpImage(source, extender,
79: (Map) renderHints, layout, scaleX, scaleY, qsFilter,
80: interp);
81: } // create
82:
83: } // FilteredSubsampleRIF
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