package pl.wroc.pwr.imagechannel.basic;

import pl.wroc.pwr.IOperator;
import pl.wroc.pwr.imagechannel.IImageChannel;
import pl.wroc.pwr.imagechannel.factory.ImageChannelFactory;

public class Invert implements IOperator< IImageChannel >
{
	private IImageChannel inputChannel;
	private boolean inPlace;

	public Invert(IImageChannel channel) {
		this(channel, false);
	}

	public Invert(IImageChannel channel, boolean inPlace) {
		this.inputChannel = channel;
		this.inPlace = inPlace;
		//System.out.println("Invert on " + this.inputChannel + " with inPlace " + this.inPlace); //$NON-NLS-1$ //$NON-NLS-2$
	}

	public IImageChannel apply() {
		IImageChannel outputChannel = null;
		if ( this.inputChannel == null ) {
			return null;
		}
		outputChannel = this.inPlace ? this.inputChannel : new ImageChannelFactory(this.inputChannel).apply();
		final int maxIndex = this.inputChannel.getMaxIndex();
		for ( int i = 0; i < maxIndex; i++ ) {
			outputChannel.setValue( i, 1 - this.inputChannel.getValue( i ) );
		}
		return outputChannel;
	}
}