samer@0: /*
samer@0:  *	MatrixTImageSourceF.java	
samer@0:  *
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.maths;
samer@0: import  samer.tools.*;
samer@0: import  Jama.Matrix;
samer@0: import  java.awt.image.*;
samer@0: 
samer@0: /** This one sends pixels in vertical strips: better for
samer@0: 	column vectors or very narrow matrices
samer@0:  */
samer@0: 
samer@0: public class MatrixTImageSourceF extends ImageSourceBase
samer@0: {
samer@0: 	Matrix		matrix;
samer@0: 	byte []		strip;
samer@0: 
samer@0: 	public MatrixTImageSourceF( Matrix mat)
samer@0: 	{
samer@0: 		matrix	= mat;
samer@0: 		width		= mat.getRowDimension();
samer@0: 		height	= mat.getColumnDimension();
samer@0: 		strip		= new byte[height];
samer@0: 	}
samer@0: 
samer@0: 	public void newMatrix(Matrix mat) { matrix=mat; sendPixels();	}
samer@0: 
samer@0: 	protected int getHints() { 
samer@0: 		if (width==1) {
samer@0: 			return  ImageConsumer.TOPDOWNLEFTRIGHT 
samer@0: 					| ImageConsumer.COMPLETESCANLINES
samer@0: 					| ImageConsumer.SINGLEPASS;
samer@0: 		} else {
samer@0: 			return ImageConsumer.RANDOMPIXELORDER | ImageConsumer.SINGLEPASS; 
samer@0: 		}
samer@0: 	}
samer@0: 	protected void sendPixels(ImageConsumer ic)
samer@0: 	{
samer@0: 		double[][] X=matrix.getArray();
samer@0: 
samer@0: 		for (int i=0; i<width; i++) {
samer@0: 			double[] Xi=X[i]; // can't believe compiler isn't doing this!
samer@0: 			for (int j=0; j<height; j++) {
samer@0: 				strip[height-1-j] = (byte)map.clipInt(Xi[j]);
samer@0: 			}
samer@0: 			ic.setPixels(i, 0, 1, height, model, strip, 0, 1);
samer@0: 		} 
samer@0: 	}
samer@0: }