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1 /* |
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2 * Copyright (c) 2004-2006 Nokia Corporation and/or its subsidiary(-ies). |
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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 "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 * |
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14 * Description: Scaler for bitmaps. |
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15 * |
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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 #ifndef CVTENGIMAGESCALER_H |
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21 #define CVTENGIMAGESCALER_H |
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22 |
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23 // INCLUDES |
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24 #include "MVtEngImageScaler.h" |
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25 #include <cvtimagescaler.h> |
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26 |
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27 // FORWARD DECLARATIONS |
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28 class MVtEngScalerObserver; |
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29 class CVtImageScaler; |
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30 class CVtImageBitmap; |
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31 |
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32 /** |
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33 * Image scaler implementation class. |
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34 * |
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35 * @lib videoteleng.lib |
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36 * @since Series 60 2.8 |
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37 */ |
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38 NONSHARABLE_CLASS( CVtEngImageScaler ) : public CBase, |
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39 public MVtImageScalerObserver, |
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40 public MVtEngImageScaler |
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41 { |
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42 public: // constructor and destructor |
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43 |
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44 /** |
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45 * Two-phased constructor. |
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46 * @param aObserver scaling finished callback. |
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47 * @return scaler |
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48 */ |
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49 static MVtEngImageScaler* NewL( |
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50 MVtEngScalerObserver& aObserver ); |
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51 |
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52 /** |
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53 * Destructor |
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54 */ |
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55 virtual ~CVtEngImageScaler(); |
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56 |
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57 private: // constructor |
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58 |
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59 /** |
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60 * C++ constructor. |
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61 * @param aObserver scaling finished callback. |
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62 */ |
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63 CVtEngImageScaler( |
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64 MVtEngScalerObserver& aObserver ); |
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65 |
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66 |
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67 /** |
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68 * Symbian constructor that may leave. |
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69 */ |
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70 void ConstructL(); |
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71 |
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72 public: // From MVtEngImageScaler. |
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73 |
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74 /** |
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75 * @see MVtEngImageScaler. |
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76 */ |
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77 virtual void ScaleL( |
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78 TInt aSourceIndex ); |
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79 |
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80 /** |
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81 * @see MVtEngImageScaler |
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82 */ |
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83 virtual TBool ConfigureL( |
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84 TDisplayMode aDisplayMode, |
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85 TSize aSize, |
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86 TInt aSourceHandle1, |
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87 TInt aSourceHandle2 ); |
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88 |
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89 /** |
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90 * @see MVtEngImageScaler. |
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91 */ |
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92 virtual void Release(); |
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93 |
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94 /** |
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95 * @see MVtEngImageScaler. |
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96 */ |
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97 virtual TInt Cancel(); |
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98 |
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99 public: // From MVtImageScalerObserver. |
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100 |
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101 /** |
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102 * @ see MVtImageScalerObserver. |
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103 */ |
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104 virtual void ScalingFinished( TInt aError ); |
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105 |
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106 private: |
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107 /** |
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108 * EFirstBitmap |
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109 * Use the first bitmap. |
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110 * ESecondBitmap |
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111 * Use the second bitmap. |
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112 */ |
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113 enum |
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114 { |
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115 EFirstBitmap = 0, |
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116 ESecondBitmap = 1 |
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117 }; |
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118 |
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119 /** |
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120 * Fetches the used scaling method from locally. |
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121 * variated properties, and stores it into iScalingMethod. |
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122 */ |
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123 void GetScalingMethodL(); |
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124 |
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125 private: |
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126 |
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127 // Observer receiving scaled bitmaps. |
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128 MVtEngScalerObserver& iObserver; |
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129 |
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130 // Actual component doing the scaling. |
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131 CVtImageScaler* iVtScaler; |
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132 |
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133 // Target bitmaps. |
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134 RPointerArray<CVtImageBitmap> iTargets; |
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135 |
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136 // Source bitmaps. |
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137 RPointerArray<CVtImageBitmap> iSources; |
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138 |
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139 // Bitmap index in targets. |
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140 TInt iTargetBitmapInUse; |
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141 |
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142 // Display mode. |
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143 TDisplayMode iMode; |
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144 |
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145 // Scaled size. |
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146 TSize iSize; |
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147 |
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148 // Method of scaling |
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149 CVtImageScaler::TQuality iScalingMethod; |
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150 }; |
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151 |
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152 #endif // CVTENGIMAGESCALER_H |
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153 |
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154 // End of File |