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/// <summary>**************************************************************************
/// 
/// $Id: LookUpTable16LinearSRGBtoSRGB.java,v 1.1 2002/07/25 14:56:47 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 Linear 16 bit SRGB to SRGB lut
        /// 
        /// </summary>
        /// <version>   1.0
        /// </version>
        /// <author>    Bruce A. Kern
        /// </author>
        public class LookUpTable16LinearSRGBtoSRGB:LookUpTable16
        {
                
                /// <summary> Factory method for creating the lut.</summary>
                /// <param name="wShadowCutoff">size of shadow region
                /// </param>
                /// <param name="dfShadowSlope">shadow region parameter
                /// </param>
                /// <param name="ksRGBLinearMaxValue">size of lut
                /// </param>
                /// <param name="ksRGB8ScaleAfterExp">post shadow region parameter
                /// </param>
                /// <param name="ksRGBExponent">post shadow region parameter
                /// </param>
                /// <param name="ksRGB8ReduceAfterEx">post shadow region parameter
                /// </param>
                /// <returns> the lut
                /// </returns>
                public static LookUpTable16LinearSRGBtoSRGB createInstance(int wShadowCutoff, double dfShadowSlope, int ksRGBLinearMaxValue, double ksRGB8ScaleAfterExp, double ksRGBExponent, double ksRGB8ReduceAfterEx)
                {
                        return new LookUpTable16LinearSRGBtoSRGB(wShadowCutoff, dfShadowSlope, ksRGBLinearMaxValue, ksRGB8ScaleAfterExp, ksRGBExponent, ksRGB8ReduceAfterEx);
                }
                
                /// <summary> Construct the lut</summary>
                /// <param name="wShadowCutoff">size of shadow region
                /// </param>
                /// <param name="dfShadowSlope">shadow region parameter
                /// </param>
                /// <param name="ksRGBLinearMaxValue">size of lut
                /// </param>
                /// <param name="ksRGB8ScaleAfterExp">post shadow region parameter
                /// </param>
                /// <param name="ksRGBExponent">post shadow region parameter
                /// </param>
                /// <param name="ksRGB8ReduceAfterExp">post shadow region parameter
                /// </param>
                protected internal LookUpTable16LinearSRGBtoSRGB(int wShadowCutoff, double dfShadowSlope, int ksRGBLinearMaxValue, double ksRGB8ScaleAfterExp, double ksRGBExponent, double ksRGB8ReduceAfterExp):base(ksRGBLinearMaxValue + 1, (short) 0)
                {
                        
                        int i = - 1;
                        //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'"
                        double dfNormalize = 1.0 / (float) ksRGBLinearMaxValue;
                        
                        // Generate the final linear-sRGB to non-linear sRGB LUT
                        for (i = 0; i <= wShadowCutoff; 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] = (byte) System.Math.Floor(dfShadowSlope * (double) i + 0.5);
                        }
                        
                        // Now calculate the rest
                        for (; i <= ksRGBLinearMaxValue; 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] = (byte) System.Math.Floor(ksRGB8ScaleAfterExp * System.Math.Pow((double) i * dfNormalize, ksRGBExponent) - ksRGB8ReduceAfterExp + 0.5);
                        }
                }
                
                /* end class LookUpTable16LinearSRGBtoSRGB */
        }
}

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