samer@0: /*
samer@0:  *	MatrixImageSource.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  java.awt.image.*;
samer@0: import  Jama.Matrix;
samer@0: 
samer@0: /** This matrix image source sends pixels a scan line
samer@0: 	at a time
samer@0: 
samer@0: 	TODO:
samer@0: 		flip horizontally or vertically
samer@0: 		flip diagonally
samer@0: 		replaceable map (ie nonlinear map)
samer@0: */
samer@0: 
samer@0: public class MatrixImageSource extends ImageSourceBase
samer@0: {
samer@0: 	Matrix		matrix;
samer@0: 	byte []		scanline;
samer@0: 
samer@0: 	public MatrixImageSource( Matrix mat) { this(mat,true); }
samer@0: 	public MatrixImageSource( Matrix mat, boolean fb)
samer@0: 	{
samer@0: 		matrix	= mat;
samer@0: 		width		= mat.getColumnDimension();
samer@0: 		height	= mat.getRowDimension();
samer@0: 		scanline	= new byte[width];
samer@0: 	}
samer@0: 
samer@0: 	public void newMatrix(Matrix mat) { matrix=mat; sendPixels();	}
samer@0: 
samer@0: 	protected int getHints() {
samer@0: 		return  ImageConsumer.TOPDOWNLEFTRIGHT 
samer@0: 				| ImageConsumer.COMPLETESCANLINES
samer@0: 				| 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 j=height-1; j>=0; j--) {
samer@0: 			double [] Xj = X[j];
samer@0: 			for (int i=0; i<width; i++) {
samer@0: 				scanline[i] = (byte)map.clipInt(Xj[i]);
samer@0: 			}
samer@0: 			ic.setPixels(0, height-1-j, width, 1, model, scanline, 0, 1);
samer@0: 		} 
samer@0: 	}
samer@0: }
samer@0: