SampledComponentSampleModel.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2013
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4che3.image;

import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.SampleModel;

/**
 * @author Bill Wallace <wayfarer3130@gmail.com>
 * @author Gunter Zeilinger <gunterze@gmail.com>
 *
 */
public class SampledComponentSampleModel extends SampleModel {

    private final ColorSubsampling subsampling;

    public SampledComponentSampleModel(int w, int h, ColorSubsampling subsampling) {
        super(DataBuffer.TYPE_BYTE, w, h, 3);
        this.subsampling = subsampling;
    }

    @Override
    public SampleModel createCompatibleSampleModel(int w, int h) {
        return new SampledComponentSampleModel(w, h, subsampling);
    }

    @Override
    public DataBuffer createDataBuffer() {
        return new DataBufferByte(subsampling.frameLength(width, height));
    }

    @Override
    public SampleModel createSubsetSampleModel(int[] bands) {
        if (bands.length != 3 
                || bands[0] != 0
                || bands[1] != 1
                || bands[2] != 2)
            throw new UnsupportedOperationException();

        return this;
    }

    @Override
    public Object getDataElements(int x, int y, Object obj, DataBuffer data) {
        byte[] ret;
        if ((obj instanceof byte[]) && ((byte[]) obj).length == 3)
            ret = (byte[]) obj;
        else
            ret = new byte[3];
        DataBufferByte dbb = (DataBufferByte) data;
        byte[] ba = dbb.getData();
        int iy = subsampling.indexOfY(x, y, width);
        int ibr = subsampling.indexOfBR(x, y, width);
        ret[0] = ba[iy];
        ret[1] = ba[ibr];
        ret[2] = ba[ibr+1];
        return ret;
    }

    @Override
    public int getNumDataElements() {
        return 3;
    }

    @Override
    public int getSample(int x, int y, int b, DataBuffer data) {
        return ((byte[]) getDataElements(x, y, null, data))[b];
    }

    @Override
    public int[] getSampleSize() {
        return new int[] { 8, 8, 8 };
    }

    @Override
    public int getSampleSize(int band) {
        return 8;
    }

    @Override
    public void setDataElements(int x, int y, Object obj, DataBuffer data) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void setSample(int x, int y, int b, int s, DataBuffer data) {
        throw new UnsupportedOperationException();
    }

}