corrade-vassal – Rev 1

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/// <summary>**************************************************************************
/// 
/// $Id: LookUpTable16Gamma.java,v 1.1 2002/07/25 14:56:46 grosbois Exp $
/// 
/// Copyright Eastman Kodak Company, 343 State Street, Rochester, NY 14650
/// $Date $
/// ***************************************************************************
/// </summary>
using System;
using ICCCurveType = CSJ2K.Icc.Tags.ICCCurveType;
namespace CSJ2K.Icc.Lut
{
        
        /// <summary> A Gamma based 16 bit lut.
        /// 
        /// </summary>
        /// <seealso cref="jj2000.j2k.icc.tags.ICCCurveType">
        /// </seealso>
        /// <version>   1.0
        /// </version>
        /// <author>    Bruce A. Kern
        /// </author>
        public class LookUpTable16Gamma:LookUpTable16
        {
                
                /* Construct the lut 
                *   @param curve data 
                *   @param dwNumInput size of lut 
                *   @param dwMaxOutput max value of lut   
                */
                public LookUpTable16Gamma(ICCCurveType curve, int dwNumInput, int dwMaxOutput):base(curve, dwNumInput, dwMaxOutput)
                {
                        double dfE = ICCCurveType.CurveGammaToDouble(curve.entry(0)); // Gamma exponent for inverse transformation
                        for (int i = 0; i < dwNumInput; i++)
                        {
                                //UPGRADE_WARNING: Data types in Visual C# might be different.  Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
                                lut[i] = (short) System.Math.Floor(System.Math.Pow((double) i / (dwNumInput - 1), dfE) * dwMaxOutput + 0.5);
                        }
                }
                
                /* end class LookUpTable16Gamma */
        }
}
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