/*
 * #%L
 * ImageJ OPS: a framework for reusable algorithms.
 * %%
 * Copyright (C) 2014 Board of Regents of the University of
 * Wisconsin-Madison and University of Konstanz.
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package imagej.ops.arithmetic.add.parallel;

import imagej.ops.Op;
import imagej.ops.OpService;
import imagej.ops.chunker.Chunk;
import imagej.ops.chunker.Chunker;
import net.imglib2.img.array.ArrayImg;
import net.imglib2.img.basictypeaccess.array.DoubleArray;
import net.imglib2.type.numeric.real.DoubleType;

import org.scijava.ItemIO;
import org.scijava.Priority;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;

/**
 * Multi-threaded version of optimized add constant for {@link ArrayImg}s of type
 * {@link DoubleType}.
 * 
 * @author Curtis Rueden
 */
@Plugin(type = Op.class, name = "add", priority = Priority.HIGH_PRIORITY + 11)
public class AddConstantToArrayDoubleImageP implements Op {

	@Parameter
	private OpService opService;

	@Parameter(type = ItemIO.BOTH)
	private ArrayImg<DoubleType, DoubleArray> image;

	@Parameter
	private byte value;

	@Override
	public void run() {
		final double[] data = image.update(null).getCurrentStorageArray();
		opService.run(Chunker.class, new Chunk() {

			@Override
			public void execute(final int startIndex, final int stepSize, final int numSteps)
			{
				if (stepSize != 1) {
					for (int i = startIndex, j = 0; j < numSteps; i = i + stepSize, j++) {
						data[i] += value;
					}
				}
				else {
					for (int i = startIndex; i < startIndex + numSteps; i++) {
						data[i] += value;
					}
				}
			}
		}, data.length);
	}
}

Add parallel version of DoubleType ArrayImg adder