1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - Initial contribution |
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11 * |
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12 * Contributors: |
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13 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * |
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17 */ |
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18 |
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19 |
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20 //----IMAAMI---- |
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21 //************************************************************************* |
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22 //CDCIETD.h |
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23 // |
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24 //Version 2.00 |
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25 // |
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26 //Contains: |
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27 // CDCIETD |
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28 // Display specific color contrast enhancement, |
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29 // Image Enhancement for Transflective Displays version 2, |
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30 // IETD 2. |
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31 // |
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32 // The class implements the following image enhancements algorithms: |
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33 // - Histogram guided contrast stretch |
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34 // - Color saturation increase |
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35 // |
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36 // Usage: |
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37 // - First an instance of this class is created by factory functions NewL() or NewLC. |
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38 // - All settings and configurations can be done by calling function SetParams(). |
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39 // Current parameters can be checked by calling function GetParams(). |
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40 // - Then the The Analyze() function is called with CFbsBitmap as an argumet. |
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41 // This function have to be called at least once before ProcessL(). |
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42 // - Then the The ProcessL() function is called with CFbsBitmap as an argumet. |
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43 // The bitmap is handled in place so this function modifies the given bitmap. |
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44 // |
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45 //History: |
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46 // 23.10.2003 version 2.00 created using existing IMAAMI IETD |
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47 //************************************************************************* |
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48 |
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49 #ifndef __DCIetd_H__ |
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50 #define __DCIetd_H__ |
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51 |
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52 // INCLUDES |
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53 |
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54 #ifndef __E32STD_H__ |
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55 #include <e32std.h> // for Fundamental Types |
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56 #endif // __E32STD_H__ |
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57 |
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58 #ifndef __E32BASE_H__ |
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59 #include <e32base.h> // for CBase |
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60 #endif // __E32BASE_H__ |
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61 |
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62 //Default parameters |
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63 #include "DCInit.h" |
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64 |
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65 |
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66 //------------------- |
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67 // CLASS DEFINITIONS |
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68 // CDCIetd - The one and ony class to contain all required methods |
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69 // to implement DCIetd functionality. |
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70 class CDCIetd : public CBase |
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71 { |
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72 public: |
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73 |
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74 //Parameter struct |
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75 struct DCIetdParameters |
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76 { |
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77 TUint8 aWhitePixels; //Percentage of pixels stretched to maximum value |
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78 TUint8 aBlackPixels; //Percentage of pixels stretched to minimum value |
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79 TUint8 aStretchLimit; //Narrowest histogram to be stretched to full range |
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80 TUint8 aSaturationGain; //Saturation increase gain |
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81 TUint8 aBitLimit; //Minimum number of color values for full gain |
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82 TUint8 aWBC; //White balance correction limit |
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83 TUint8 aDBC; //Dark balance correction limit |
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84 }; |
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85 |
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86 CDCIetd(); // Constructor |
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87 static CDCIetd* NewL(); // Factory function NewL |
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88 static CDCIetd* NewLC();// Factory function NewLC |
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89 ~CDCIetd(); // Destructor |
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90 void ConstructL(); // Second Phase contructor (may leave) |
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91 |
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92 // Analyze image referenced by aBPtr |
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93 void Analyze(CFbsBitmap& aBPtr); |
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94 |
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95 // Process and store image referenced by aBPtr |
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96 void ProcessL(CFbsBitmap& aBPtr); |
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97 |
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98 // Parameter exchange |
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99 void SetParams(DCIetdParameters* parameters); |
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100 void GetParams(DCIetdParameters* parameters); |
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101 |
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102 private: |
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103 |
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104 void GatherHistograms(const CFbsBitmap& aBPtr); // Construct the R, G, and B Histograms |
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105 void MakeMappings(); // Calculate the mapping LUTs |
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106 |
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107 // Limit integer value to byte [0,255] |
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108 static inline TUint8 Limit255(TInt i) {return (TUint8)(i<0?0:(i>255?255:i));} |
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109 |
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110 TUint iHistogram[3][256]; // Histogram data |
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111 TUint8 iMap[3][256]; // Color component mapping funtions |
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112 HBufC8* iScanLineBuffer; // Scan line buffer |
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113 |
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114 TUint8 iReducedStretchLimit[3]; //Stretch limits for each component |
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115 |
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116 DCIetdParameters iParameters; //Parameters |
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117 }; |
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118 |
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119 #endif // __DCIetd_H__ |
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120 |
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121 // End of File |
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122 //----IMAAMI---- |
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