1 /* |
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2 * Copyright (c) 2008-2009 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: Classes for thumbnail-related tasks. |
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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 /** |
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21 * @internal reviewed 30/07/2007 by Simon Brooks |
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22 */ |
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23 |
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24 #ifndef C_GLXTNGENERATETHUMBNAILTASK_H |
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25 #define C_GLXTNGENERATETHUMBNAILTASK_H |
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26 |
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27 #include "glxtnloadthumbnailtask.h" |
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28 |
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29 class CGlxtnFileInfo; |
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30 class CGlxtnFileUtility; |
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31 class CGlxtnImageUtility; |
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32 class CGlxtnVideoUtility; |
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33 class CFbsBitmap; |
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34 class CImageDecoder; |
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35 class RFs; |
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36 |
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37 /** |
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38 * Task to generate a high quality thumbnail for a media item. |
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39 * |
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40 * An instance of CImageDecoder is constructed to produce a bitmap from the |
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41 * image file, scaling to the smallest possible size not smaller than the |
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42 * required size. |
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43 * |
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44 * The task then uses ADIS to scale to the exact size required, and also uses |
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45 * the sharpening and IETD algorithms to enhance the image. |
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46 * |
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47 * @ingroup glx_thumbnail_creator |
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48 */ |
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49 NONSHARABLE_CLASS( CGlxtnGenerateThumbnailTask ) |
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50 : public CGlxtnLoadThumbnailTask |
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51 { |
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52 public: |
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53 /** |
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54 * Two-phased constructor. |
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55 * @param aRequestInfo Parameters for the thumbnail request. |
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56 * @param aFileUtility File utility for use by the task. |
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57 * @param aClient Client initiating the request. |
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58 */ |
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59 static CGlxtnGenerateThumbnailTask* NewL( |
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60 const TGlxThumbnailRequest& aRequestInfo, |
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61 CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient); |
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62 /** |
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63 * Destructor. |
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64 */ |
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65 ~CGlxtnGenerateThumbnailTask(); |
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66 |
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67 protected: // From CGlxtnTask |
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68 void SetManager(CGlxtnTaskManager* aManager); |
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69 virtual TBool DoStartL(TRequestStatus& aStatus); |
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70 virtual void DoCancel(); |
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71 virtual TBool DoRunL(TRequestStatus& aStatus); |
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72 TBool DoRunError(TInt aError); |
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73 |
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74 private: |
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75 /** |
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76 * C++ default constructor. |
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77 * @param aRequestInfo Parameters for the thumbnail request. |
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78 * @param aFileUtility File utility for use by the task. |
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79 * @param aClient Client initiating the request. |
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80 */ |
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81 CGlxtnGenerateThumbnailTask(const TGlxThumbnailRequest& aRequestInfo, |
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82 CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient); |
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83 /** |
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84 * Symbian 2nd phase constructor. |
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85 * @param aBitmapHandle Handle to bitmap in which to store the thumbnail. |
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86 */ |
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87 void ConstructL(TInt aBitmapHandle); |
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88 |
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89 /** |
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90 * Start asynchronous decoding process for a high quality thumbnail. |
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91 * @param aStatus Request status for the asynchronous operation. |
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92 */ |
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93 void HighQualityDecodeL( TRequestStatus& aStatus ); |
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94 /** |
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95 * @return ETrue if viewing the requested thumbnail size would require |
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96 * DRM rights. |
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97 */ |
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98 TBool SizeRequiresDrmRights(); |
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99 |
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100 private: |
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101 /** Pointer to task manager (not owned) */ |
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102 CGlxtnTaskManager* iTaskManager; |
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103 /** Utility to get thumbnail from image (owned) */ |
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104 CGlxtnImageUtility* iImageUtility; |
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105 /** Utility to get thumbnail from video (owned) */ |
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106 CGlxtnVideoUtility* iVideoUtility; |
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107 /** Image loaded from file (owned) */ |
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108 CFbsBitmap* iImage; |
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109 /** Whether current item is a video */ |
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110 TBool iVideo; |
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111 /** Whether current file is DRM protected */ |
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112 TBool iProtected; |
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113 /** Flag to show BadFileMarker not created so no need to delete **/ |
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114 TBool iBadFileMarkerNotNeededFlag; |
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115 }; |
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116 |
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117 #endif // C_GLXTNGENERATETHUMBNAILTASK_H |
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