/***************************************************************************** * * $Id: LookUpTable8Interp.java,v 1.1.1.1 2002/08/02 09:47:04 grosbois Exp $ * * Copyright Eastman Kodak Company, 343 State Street, Rochester, NY 14650 * $Date $ *****************************************************************************/package icc.lut;import icc .tags.ICCCurveType;/** * An interpolated 8 bit lut *  * @version	1.0 * @author	Bruce A.Kern */public class LookUpTable8Interp extends LookUpTable8 {    /**     * Construct the lut from the curve data     *   @oaram  curve the data     *   @oaram  dwNumInput the lut size     *   @oaram  dwMaxOutput the lut max value     */    public LookUpTable8Interp (                 ICCCurveType curve,   // Pointer to the curve data                             int dwNumInput,       // Number of input values in created LUT                 byte dwMaxOutput      // Maximum output value of the LUT                 ) {        super (curve, dwNumInput, dwMaxOutput);        int    dwLowIndex, dwHighIndex;		    // Indices of interpolation points        double dfLowIndex, dfHighIndex;			// FP indices of interpolation points        double dfTargetIndex;					// Target index into interpolation table        double dfRatio;							// Ratio of LUT input points to curve values        double dfLow, dfHigh;					// Interpolation values        double dfOut;							// Output LUT value	        dfRatio = (double)(curve.count-1) / (double)(dwNumInput - 1);	        for (int i = 0; i < dwNumInput; i++) {            dfTargetIndex = (double) i * dfRatio;            dfLowIndex    = Math.floor(dfTargetIndex);            dwLowIndex    = (int) dfLowIndex;            dfHighIndex   = Math.ceil(dfTargetIndex);            dwHighIndex   = (int) dfHighIndex;                        if (dwLowIndex == dwHighIndex) dfOut = ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));            else {                  dfLow  = ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));                dfHigh = ICCCurveType.CurveToDouble(curve.entry(dwHighIndex));                dfOut  = dfLow + (dfHigh - dfLow) * (dfTargetIndex - dfLowIndex); }                        lut[i] = (byte)Math.floor(dfOut * dwMaxOutput + 0.5); }}    /* end class LookUpTable8Interp */ }