view src/samer/maths/MatrixImageSourceF.java @ 0:bf79fb79ee13

Initial Mercurial check in.

/*
 *	MatrixImageSourceF.java	
 *
 *	Copyright (c) 2000, Samer Abdallah, King's College London.
 *	All rights reserved.
 *
 *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
 *	without even the implied warranty of MERCHANTABILITY or 
 *	FITNESS FOR A PARTICULAR PURPOSE.
 */

package samer.maths;
import  samer.tools.*;
import  java.awt.image.*;
import  Jama.Matrix;

/** This one sends pixels in vertical strips: better for
	column vectors or very narrow matrices
 */

public class MatrixImageSourceF extends ImageSourceBase
{
	Matrix		matrix;
	byte []		strip;

	public MatrixImageSourceF( Matrix mat)
	{
		matrix	= mat;
		width		= mat.getColumnDimension();
		height	= mat.getRowDimension();
		strip		= new byte[height];
	}

	public void newMatrix(Matrix mat) { matrix=mat; sendPixels();	}

	protected int getHints() { 
		if (width==1) {
			return  ImageConsumer.TOPDOWNLEFTRIGHT 
					| ImageConsumer.COMPLETESCANLINES
					| ImageConsumer.SINGLEPASS;
		} else {
			return ImageConsumer.RANDOMPIXELORDER | ImageConsumer.SINGLEPASS; 
		}
	}

	protected void sendPixels(ImageConsumer ic)
	{
		double[][] X=matrix.getArray();

		for (int i=0; i<width; i++) {
			for (int j=0; j<height; j++) {
				strip[height-1-j] = (byte)map.clipInt(X[j][i]);
			}
			ic.setPixels(i, 0, 1, height, model, strip, 0, 1);
		} 
	}
}