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1 /* |
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2 * Copyright (c) 2008-2010 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: Utility class for asynchronously decoding the header thumbnail image |
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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 #ifndef CCAPPIMAGEDECODING_H_ |
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20 #define CCAPPIMAGEDECODING_H_ |
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21 |
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22 #include <e32base.h> |
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23 |
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24 class CBitmapScaler; |
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25 class CImageDecoder; |
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26 class CFbsBitmap; |
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27 class RFs; |
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28 |
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29 class MCCAppImageDecodingObserver |
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30 { |
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31 public: |
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32 /** |
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33 * Bitmap is decoded. |
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34 * @param aBitmap Decoded bitmap, ownership is transferred. |
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35 */ |
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36 virtual void BitmapReadyL( CFbsBitmap* aBitmap ) = 0; |
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37 |
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38 protected: |
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39 MCCAppImageDecodingObserver() {}; |
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40 virtual ~MCCAppImageDecodingObserver() {}; |
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41 }; |
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42 |
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43 |
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44 /** |
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45 * Utility class for asynchronously decoding the header thumbnail image |
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46 * |
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47 * @code |
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48 * ?good_class_usage_example(s) |
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49 * @endcode |
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50 * |
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51 * @lib ccapputil.dll |
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52 * @since S60 v9.2 |
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53 */ |
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54 NONSHARABLE_CLASS( CCCAppImageDecoding ) : public CActive |
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55 { |
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56 public: |
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57 /** |
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58 * Two-phased constructor |
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59 * |
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60 * @param aObserver |
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61 * @param aBitmapData Descriptor containing the bitmap data stream, takes ownership |
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62 * @param aImageFile Descriptor containing image file name full path, takes ownership |
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63 */ |
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64 IMPORT_C static CCCAppImageDecoding* NewL( |
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65 MCCAppImageDecodingObserver& aObserver, |
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66 RFs& aFs, |
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67 HBufC8* aBitmapData, |
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68 HBufC* aImageFile ); |
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69 |
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70 /** |
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71 * Destructor |
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72 */ |
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73 ~CCCAppImageDecoding(); |
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74 |
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75 /** |
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76 * Starts the decoding process |
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77 * |
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78 * @param aImageSize defines image size |
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79 */ |
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80 IMPORT_C void StartL( const TSize& aImageSize ); |
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81 |
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82 private: |
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83 /** |
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84 * From CActive |
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85 * (see details from baseclass ) |
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86 */ |
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87 void RunL(); |
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88 |
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89 /** |
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90 * From CActive |
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91 * (see details from baseclass ) |
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92 */ |
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93 void DoCancel(); |
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94 private: |
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95 /** |
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96 * First-phase (C++) constructor |
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97 */ |
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98 inline CCCAppImageDecoding( |
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99 MCCAppImageDecodingObserver& aObserver, |
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100 RFs& aFs, |
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101 HBufC8* aBitmapData, |
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102 HBufC* aImageFile); |
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103 |
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104 /** |
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105 * Second phase constructor |
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106 */ |
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107 inline void ConstructL(); |
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108 |
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109 /** |
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110 * Scales bitmap |
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111 * |
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112 */ |
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113 void ScaleBitmapL(); |
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114 |
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115 void CropBitmapL(); |
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116 |
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117 /** |
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118 * Create bitmap |
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119 * |
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120 */ |
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121 void CreateBitmapL(); |
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122 |
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123 enum TCcaImageDecoderState |
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124 { |
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125 ECcaConvertThumbnailImage = 1, |
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126 ECcaScaleThumbnail, |
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127 ECcaReadImageFromFile, |
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128 ECcaConvertImageFromFile, |
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129 ECcaScaleImage |
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130 }; |
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131 |
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132 /** |
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133 * The image scaler whose service is called to scale the image |
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134 * Own. |
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135 */ |
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136 CBitmapScaler* iBitmapScaler; |
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137 |
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138 /** |
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139 * The image decoder whose service is called to decode the image |
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140 * Own. |
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141 */ |
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142 CImageDecoder* iImgDecoder; |
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143 |
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144 MCCAppImageDecodingObserver& iObserver; |
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145 |
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146 /** |
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147 * Handle to the file server session for loading the bitmap |
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148 */ |
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149 RFs& iFs; |
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150 |
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151 /** |
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152 * The bitmap. |
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153 * Owned until decoding is complete, then ownersip is transferred to header control. |
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154 */ |
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155 CFbsBitmap* iBitmap; // owned until completion |
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156 |
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157 /** |
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158 * Own. |
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159 */ |
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160 HBufC8* iBitmapData; |
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161 |
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162 /** |
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163 * Own. |
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164 */ |
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165 HBufC* iImageFullName; |
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166 |
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167 /** |
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168 * Contact bitmap size |
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169 */ |
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170 TSize iBitmapSize; |
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171 |
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172 /** |
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173 * Decoder internal state |
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174 */ |
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175 TInt iDecoderState; |
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176 |
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177 /** |
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178 * Timer used to delay image conversion |
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179 */ |
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180 RTimer iTimer; |
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181 }; |
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182 |
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183 #endif /*CCAPPIMAGEDECODING_H_*/ |