corrade-vassal – Blame information for rev 1
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1 | vero | 1 | /// <summary>************************************************************************** |
2 | /// |
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3 | /// $Id: LookUpTable16LinearSRGBtoSRGB.java,v 1.1 2002/07/25 14:56:47 grosbois Exp $ |
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4 | /// |
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5 | /// Copyright Eastman Kodak Company, 343 State Street, Rochester, NY 14650 |
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6 | /// $Date $ |
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7 | /// *************************************************************************** |
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8 | /// </summary> |
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9 | using System; |
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10 | using ICCCurveType = CSJ2K.Icc.Tags.ICCCurveType; |
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11 | namespace CSJ2K.Icc.Lut |
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12 | { |
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13 | |||
14 | /// <summary> A Linear 16 bit SRGB to SRGB lut |
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15 | /// |
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16 | /// </summary> |
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17 | /// <version> 1.0 |
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18 | /// </version> |
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19 | /// <author> Bruce A. Kern |
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20 | /// </author> |
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21 | public class LookUpTable16LinearSRGBtoSRGB:LookUpTable16 |
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22 | { |
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23 | |||
24 | /// <summary> Factory method for creating the lut.</summary> |
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25 | /// <param name="wShadowCutoff">size of shadow region |
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26 | /// </param> |
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27 | /// <param name="dfShadowSlope">shadow region parameter |
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28 | /// </param> |
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29 | /// <param name="ksRGBLinearMaxValue">size of lut |
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30 | /// </param> |
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31 | /// <param name="ksRGB8ScaleAfterExp">post shadow region parameter |
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32 | /// </param> |
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33 | /// <param name="ksRGBExponent">post shadow region parameter |
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34 | /// </param> |
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35 | /// <param name="ksRGB8ReduceAfterEx">post shadow region parameter |
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36 | /// </param> |
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37 | /// <returns> the lut |
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38 | /// </returns> |
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39 | public static LookUpTable16LinearSRGBtoSRGB createInstance(int wShadowCutoff, double dfShadowSlope, int ksRGBLinearMaxValue, double ksRGB8ScaleAfterExp, double ksRGBExponent, double ksRGB8ReduceAfterEx) |
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40 | { |
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41 | return new LookUpTable16LinearSRGBtoSRGB(wShadowCutoff, dfShadowSlope, ksRGBLinearMaxValue, ksRGB8ScaleAfterExp, ksRGBExponent, ksRGB8ReduceAfterEx); |
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42 | } |
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43 | |||
44 | /// <summary> Construct the lut</summary> |
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45 | /// <param name="wShadowCutoff">size of shadow region |
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46 | /// </param> |
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47 | /// <param name="dfShadowSlope">shadow region parameter |
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48 | /// </param> |
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49 | /// <param name="ksRGBLinearMaxValue">size of lut |
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50 | /// </param> |
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51 | /// <param name="ksRGB8ScaleAfterExp">post shadow region parameter |
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52 | /// </param> |
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53 | /// <param name="ksRGBExponent">post shadow region parameter |
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54 | /// </param> |
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55 | /// <param name="ksRGB8ReduceAfterExp">post shadow region parameter |
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56 | /// </param> |
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57 | protected internal LookUpTable16LinearSRGBtoSRGB(int wShadowCutoff, double dfShadowSlope, int ksRGBLinearMaxValue, double ksRGB8ScaleAfterExp, double ksRGBExponent, double ksRGB8ReduceAfterExp):base(ksRGBLinearMaxValue + 1, (short) 0) |
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58 | { |
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59 | |||
60 | int i = - 1; |
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61 | //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'" |
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62 | double dfNormalize = 1.0 / (float) ksRGBLinearMaxValue; |
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63 | |||
64 | // Generate the final linear-sRGB to non-linear sRGB LUT |
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65 | for (i = 0; i <= wShadowCutoff; i++) |
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66 | { |
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67 | //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'" |
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68 | lut[i] = (byte) System.Math.Floor(dfShadowSlope * (double) i + 0.5); |
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69 | } |
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70 | |||
71 | // Now calculate the rest |
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72 | for (; i <= ksRGBLinearMaxValue; i++) |
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73 | { |
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74 | //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'" |
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75 | lut[i] = (byte) System.Math.Floor(ksRGB8ScaleAfterExp * System.Math.Pow((double) i * dfNormalize, ksRGBExponent) - ksRGB8ReduceAfterExp + 0.5); |
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76 | } |
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77 | } |
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78 | |||
79 | /* end class LookUpTable16LinearSRGBtoSRGB */ |
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80 | } |
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81 | } |