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1 /* |
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2 * Copyright (c) 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: Class declaration of CMPXImageUtil. |
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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 CMPXIMAGEUTIL_H |
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20 #define CMPXIMAGEUTIL_H |
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21 |
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22 // INCLUDES |
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23 |
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24 #include "mpxalbumartutilobserver.h" |
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25 |
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26 |
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27 // FORWARD DECLARATIONS |
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28 class CFbsBitmap; |
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29 class CBitmapScaler; |
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30 class CImageDecoder; |
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31 |
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32 // CLASS DECLARATION |
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33 |
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34 /** |
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35 * Image Conversion Class. |
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36 **/ |
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37 class CMPXImageUtil : public CActive |
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38 { |
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39 public: |
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40 |
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41 // states for this engine |
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42 enum TState |
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43 { |
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44 EIdle = 0, |
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45 EDecoding, |
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46 EScaling |
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47 }; |
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48 |
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49 public: // Constructors and destructor |
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50 |
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51 /** |
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52 * Two-phased constructor. |
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53 * @param aObserver ablum art observer |
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54 * @return A pointer to a newly created object |
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55 */ |
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56 static CMPXImageUtil* NewL(MMPXAlbumArtUtilObserver& aObserver); |
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57 |
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58 /** |
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59 * Destructor. |
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60 */ |
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61 ~CMPXImageUtil(); |
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62 |
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63 private: |
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64 |
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65 /** |
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66 * C++ default constructor. |
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67 */ |
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68 CMPXImageUtil(MMPXAlbumArtUtilObserver& aObserver); |
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69 |
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70 /** |
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71 * By default Symbian 2nd phase constructor is private. |
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72 */ |
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73 void ConstructL(); |
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74 |
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75 public: // New functions |
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76 |
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77 /* |
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78 * Starts to decode an image from a file. |
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79 * @param aFileName Full path and filename of the image to be decoded. |
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80 * @param aSize The size of the required destination BMP. |
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81 * @param aDisplayMode the display mode of the destination BMP |
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82 */ |
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83 void StartToDecodeL(const TDesC& aFileName, |
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84 const TSize& aSize, |
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85 TDisplayMode aDisplayMode = EColor64K); |
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86 |
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87 /* |
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88 * Starts to decode an image from JPG buffer |
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89 * @param aSize The size of the required destination JPG |
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90 * @param aAlbumArt The pointer to the JPG buffer |
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91 * @param aDisplayMode the display mode of the destination JPG |
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92 */ |
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93 void StartToDecodeL(const TSize& aSize, |
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94 HBufC8* aAlbumArt, |
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95 TDisplayMode aDisplayMode = EColor64K); |
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96 |
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97 /* |
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98 * Cancel outstanding asynch requests |
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99 */ |
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100 void CancelRequest(); |
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101 |
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102 private: // New functions |
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103 |
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104 /** |
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105 * Scales iBitmap to iSize |
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106 **/ |
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107 void ScaleL(); |
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108 TSize CalculateDecodeSize(const TSize& aSize); |
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109 |
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110 private: // Functions from base classes |
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111 |
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112 /** |
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113 * Cancellation of an outstanding request. |
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114 */ |
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115 void DoCancel(); |
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116 |
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117 /** |
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118 * Handles an active object’s request completion event. |
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119 */ |
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120 void RunL(); |
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121 |
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122 private: // Data |
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123 |
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124 MMPXAlbumArtUtilObserver& iObserver; // Album art util observer |
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125 CFbsBitmap* iBitmap; // decoded image |
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126 CImageDecoder* iImageDecoder; // decoder |
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127 CBitmapScaler* iScaler; // bitmap scaler |
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128 TSize iSize; // desired size of the bitmap |
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129 TState iState; // engine state |
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130 RFs iFs; // for opening/saving images from/to files |
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131 HBufC8* iImageData; // Album art image data (owned) |
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132 TBool iScaleRquired; |
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133 }; |
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134 |
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135 #endif // CMPXIMAGEUTIL_H |
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136 |
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137 // End of File |