API Overview API Index Package Overview Direct link to this page
JDK 1.6
  java.awt.image. PixelInterleavedSampleModel View Javadoc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

/*
 * @(#)PixelInterleavedSampleModel.java	1.21 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.awt.image;

/**
 *  This class represents image data which is stored in a pixel interleaved
 *  fashion and for
 *  which each sample of a pixel occupies one data element of the DataBuffer.
 *  It subclasses ComponentSampleModel but provides a more efficent
 *  implementation for accessing pixel interleaved image data than is provided
 *  by ComponentSampleModel.  This class 
 *  stores sample data for all bands in a single bank of the
 *  DataBuffer. Accessor methods are provided so that image data can be
 *  manipulated directly. Pixel stride is the number of
 *  data array elements between two samples for the same band on the same
 *  scanline. Scanline stride is the number of data array elements between
 *  a given sample and the corresponding sample in the same column of the next
 *  scanline.  Band offsets denote the number
 *  of data array elements from the first data array element of the bank
 *  of the DataBuffer holding each band to the first sample of the band.
 *  The bands are numbered from 0 to N-1.
 *  Bank indices denote the correspondence between a bank of the data buffer
 *  and a band of image data.
 *  This class supports
 *  {@link DataBuffer#TYPE_BYTE TYPE_BYTE},
 *  {@link DataBuffer#TYPE_USHORT TYPE_USHORT},
 *  {@link DataBuffer#TYPE_SHORT TYPE_SHORT},
 *  {@link DataBuffer#TYPE_INT TYPE_INT},
 *  {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT} and
 *  {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE} datatypes.  
 */

public class PixelInterleavedSampleModel extends ComponentSampleModel
{
    /**
     * Constructs a PixelInterleavedSampleModel with the specified parameters.
     * The number of bands will be given by the length of the bandOffsets 
     * array.
     * @param dataType  The data type for storing samples.
     * @param w         The width (in pixels) of the region of
     *                  image data described.
     * @param h         The height (in pixels) of the region of
     *                  image data described.
     * @param pixelStride The pixel stride of the image data.
     * @param scanlineStride The line stride of the image data.
     * @param bandOffsets The offsets of all bands.
     * @throws IllegalArgumentException if <code>w</code> or
     *         <code>h</code> is not greater than 0
     * @throws IllegalArgumentException if any offset between bands is
     *         greater than the scanline stride
     * @throws IllegalArgumentException if the product of 
     *         <code>pixelStride</code> and <code>w</code> is greater
     *         than <code>scanlineStride</code>
     * @throws IllegalArgumentException if <code>pixelStride</code> is 
     *         less than any offset between bands
     * @throws IllegalArgumentException if <code>dataType</code> is not
     *         one of the supported data types
     */
    public PixelInterleavedSampleModel(int dataType,
                                       int w, int h,
                                       int pixelStride,
                                       int scanlineStride,
                                       int bandOffsets[]) {
        super(dataType, w, h, pixelStride, scanlineStride, bandOffsets);
        int minBandOff=bandOffsets[0];
        int maxBandOff=bandOffsets[0];
        for (int i=1; i<bandOffsets.length; i++) {
            minBandOff = Math.min(minBandOff,bandOffsets[i]);
            maxBandOff = Math.max(maxBandOff,bandOffsets[i]);
        }
        maxBandOff -= minBandOff;
        if (maxBandOff > scanlineStride) {
            throw new IllegalArgumentException("Offsets between bands must be"+
                                               " less than the scanline "+
                                               " stride");
        }
        if (pixelStride*w > scanlineStride) {
            throw new IllegalArgumentException("Pixel stride times width "+
                                               "must be less than or "+
                                               "equal to the scanline "+
                                               "stride");
        }
        if (pixelStride < maxBandOff) {
            throw new IllegalArgumentException("Pixel stride must be greater"+
                                               " than or equal to the offsets"+
                                               " between bands");
        }
    }

    /**
     * Creates a new PixelInterleavedSampleModel with the specified
     * width and height.  The new PixelInterleavedSampleModel will have the
     * same number of bands, storage data type, and pixel stride
     * as this PixelInterleavedSampleModel.  The band offsets may be
     * compressed such that the minimum of all of the band offsets is zero.
     * @param w the width of the resulting <code>SampleModel</code>
     * @param h the height of the resulting <code>SampleModel</code>
     * @return a new <code>SampleModel</code> with the specified width
     *         and height.
     * @throws IllegalArgumentException if <code>w</code> or
     *         <code>h</code> is not greater than 0
     */
    public SampleModel createCompatibleSampleModel(int w, int h) {
        int minBandoff=bandOffsets[0];
        int numBands = bandOffsets.length;
        for (int i=1; i < numBands; i++) {
            if (bandOffsets[i] < minBandoff) {
                minBandoff = bandOffsets[i];
            }
        }
        int[] bandOff;
        if (minBandoff > 0) {
            bandOff = new int[numBands];
            for (int i=0; i < numBands; i++) {
                bandOff[i] = bandOffsets[i] - minBandoff;
            }
        }
        else {
            bandOff = bandOffsets;
        }
        return new PixelInterleavedSampleModel(dataType, w, h, pixelStride,
                                               pixelStride*w, bandOff);
    }

    /**
     * Creates a new PixelInterleavedSampleModel with a subset of the
     * bands of this PixelInterleavedSampleModel.  The new
     * PixelInterleavedSampleModel can be used with any DataBuffer that the
     * existing PixelInterleavedSampleModel can be used with.  The new
     * PixelInterleavedSampleModel/DataBuffer combination will represent
     * an image with a subset of the bands of the original
     * PixelInterleavedSampleModel/DataBuffer combination.
     */
    public SampleModel createSubsetSampleModel(int bands[]) {
        int newBandOffsets[] = new int[bands.length];
        for (int i=0; i<bands.length; i++) {
            newBandOffsets[i] = bandOffsets[bands[i]];
        }
        return new PixelInterleavedSampleModel(this.dataType, width, height,
                                               this.pixelStride,
                                               scanlineStride, newBandOffsets);
    }

    // Differentiate hash code from other ComponentSampleModel subclasses
    public int hashCode() {
        return super.hashCode() ^ 0x1;
    }
}

Generated By: JavaOnTracks Doclet 0.1.4     ©Thibaut Colar