/// <summary> Construct the lut from the curve data</summary>
/// <oaram> curve the data </oaram>
/// <oaram> dwNumInput the lut size </oaram>
public LookUpTableFPInterp(ICCCurveType curve, int dwNumInput) : base(curve, dwNumInput)
{
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
dfRatio = (double)(curve.nEntries - 1) / (double)(dwNumInput - 1);
for (int i = 0; i < dwNumInput; i++)
{
dfTargetIndex = (double)i * dfRatio;
dfLowIndex = System.Math.Floor(dfTargetIndex);
//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'"
dwLowIndex = (int)dfLowIndex;
dfHighIndex = System.Math.Ceiling(dfTargetIndex);
//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'"
dwHighIndex = (int)dfHighIndex;
if (dwLowIndex == dwHighIndex)
{
//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] = (float)ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));
}
else
{
dfLow = ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));
dfHigh = ICCCurveType.CurveToDouble(curve.entry(dwHighIndex));
//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] = (float)(dfLow + (dfHigh - dfLow) * (dfTargetIndex - dfLowIndex));
}
}
}
/// <summary> Construct the lut from the curve data</summary>
/// <oaram> curve the data </oaram>
/// <oaram> dwNumInput the lut size </oaram>
/// <oaram> dwMaxOutput the lut max value </oaram>
public LookUpTable32Interp(ICCCurveType curve, int dwNumInput, int dwMaxOutput):base(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 = System.Math.Floor(dfTargetIndex);
//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'"
dwLowIndex = (int) dfLowIndex;
dfHighIndex = System.Math.Ceiling(dfTargetIndex);
//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'"
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);
}
//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] = (int) System.Math.Floor(dfOut * dwMaxOutput + 0.5);
}
}
/* 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);
}
}
/* 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);
}
}
