/// <summary>**************************************************************************
/// 
/// $Id: LookUpTable8Gamma.java,v 1.1 2002/07/25 14:56:48 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 LookUpTable8Gamma:LookUpTable8
	{
		
		/* Construct the lut 
		*   @param curve data 
		*   @param dwNumInput size of lut 
		*   @param dwMaxOutput max value of lut   
		*/
		public LookUpTable8Gamma(ICCCurveType curve, int dwNumInput, byte 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] = (byte) System.Math.Floor(System.Math.Pow((double) i / (dwNumInput - 1), dfE) * dwMaxOutput + 0.5);
			}
		}
		
		/* end class LookUpTable8Gamma */
	}
}