1 /* PixelInterleavedSampleModel.java
2 Copyright (C) 2004, 2005 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
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14 General Public License for more details.
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21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
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36 exception statement from your version. */
38 package java.awt.image;
42 * A <code>SampleModel</code> that uses exactly one element of the
43 * raster’s {@link DataBuffer} per pixel, holds all bands in a
44 * single bank, and stores band data in pixel-interleaved manner.
48 * @author Sascha Brawer (brawer@dandelis.ch)
50 public class PixelInterleavedSampleModel
51 extends ComponentSampleModel
53 public PixelInterleavedSampleModel(int dataType, int width, int height,
54 int pixelStride, int scanlineStride,
57 super(dataType, width, height, pixelStride, scanlineStride,
63 * Creates a new <code>SampleModel</code> that is like this one, but
64 * uses the specified width and height.
66 * @param width the number of pixels in the horizontal direction.
68 * @param height the number of pixels in the vertical direction.
70 public SampleModel createCompatibleSampleModel(int width, int height)
72 // Find minimum band offset.
73 int minBandoff = bandOffsets[0];
74 int numBands = bandOffsets.length;
75 for (int i = 1; i < numBands; i++)
77 if (bandOffsets[i] < minBandoff)
79 minBandoff = bandOffsets[i];
82 // Adjust band offsets so that minimum offset is at 0.
86 bandOff = new int[numBands];
87 for (int i = 0; i < numBands; i++)
89 bandOff[i] = bandOffsets[i] - minBandoff;
94 bandOff = bandOffsets;
96 // Adjust scanline stride for new width.
97 return new PixelInterleavedSampleModel(dataType, width, height,
98 pixelStride, pixelStride * width,
104 * Creates a new <code>SampleModel</code> that is like this one, but
105 * uses only a subset of its bands.
107 * @param bands an array whose elements indicate which bands shall
108 * be part of the subset. For example, <code>[0, 2, 3]</code> would
109 * create a SampleModel containing bands #0, #2 and #3.
111 public SampleModel createSubsetSampleModel(int[] bands)
115 subOffsets = new int[bands.length];
116 for (int i = 0; i < bands.length; i++)
117 subOffsets[i] = bandOffsets[bands[i]];
119 return new PixelInterleavedSampleModel(dataType, width, height,
120 pixelStride, scanlineStride,