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1 // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @internalTechnology |
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19 */ |
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20 |
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21 #ifndef CMTPIMAGEDPTHUMBNAILCREATOR_H |
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22 #define CMTPIMAGEDPTHUMBNAILCREATOR_H |
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23 |
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24 // INCLUDES |
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25 #include <e32base.h> |
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26 |
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27 #include <thumbnailmanager.h> |
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28 #include <thumbnailmanagerobserver.h> |
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29 #include <thumbnailobjectsource.h> |
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30 #include <thumbnaildata.h> |
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31 #include <imageconversion.h> |
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32 #include <bitmaptransforms.h> |
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33 |
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34 class CMTPTypeOpaqueData; |
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35 |
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36 #include "mtpdebug.h" |
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37 |
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38 #define MTPTHUMBSCALING |
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39 |
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40 // CLASS DECLARATION |
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41 /** |
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42 * A class for reading image related info and creating a thumbnail from |
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43 * an image. |
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44 * |
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45 * @lib ptpstack.lib |
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46 * @since S60 3.2 |
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47 */ |
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48 class CMTPImageDpThumbnailCreator : public CActive, public MThumbnailManagerObserver |
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49 { |
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50 public: |
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51 |
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52 /** |
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53 * Two-phased constructor. |
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54 * @param None. |
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55 * @return An instance of CMTPImageDpThumbnailCreator. |
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56 */ |
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57 static CMTPImageDpThumbnailCreator* NewL(); |
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58 |
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59 /** |
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60 * C++ destructor. |
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61 */ |
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62 ~CMTPImageDpThumbnailCreator(); |
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63 |
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64 public: |
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65 |
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66 /** |
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67 * Gets a thumbnail from the image. |
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68 * @since S60 3.2 |
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69 * @param aSession, Reference to file server. |
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70 * @param aFileName, Name of the image file. Caller must ensure that the referenced object exists until the asynchronous call is completed. |
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71 * @param aThumbName, Name of the thumbnail file to be created. Caller must ensure that the referenced object exists until the asynchronous call is completed. |
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72 * @param aGetThumbnailStatus, status when |
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73 */ |
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74 void GetThumbnailL(const TDesC& aFileName, CMTPTypeOpaqueData& aThumbName, TInt& result); |
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75 |
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76 |
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77 void ClearThumbnailData(); |
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78 CThumbnailManager* GetThumbMgr() { return iThumbMgr;} |
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79 |
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80 private: // From MThumbnailManagerObserver |
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81 void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail, TThumbnailRequestId aId ); |
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82 void ThumbnailPreviewReady( MThumbnailData& aThumbnail, TThumbnailRequestId aId ); |
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83 |
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84 private: // From CActive |
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85 void DoCancel(); |
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86 void RunL(); |
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87 TInt RunError(TInt aError); |
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88 |
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89 private: |
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90 void EncodeImageL(); |
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91 /** |
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92 * Scales the image as a thumbnail size. |
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93 * @since S60 3.2 |
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94 * @param None. |
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95 * @return None. |
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96 */ |
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97 #ifdef MTPTHUMBSCALING |
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98 void ScaleBitmap(); |
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99 #endif |
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100 void QueueThumbCreationL( const TDesC& aFileName ); |
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101 void CreateThumbL(const TDesC& aFileName ); |
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102 void GetThumbL(const TDesC& aFileName); |
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103 |
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104 private: |
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105 /** |
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106 * Default C++ constructor. Not used. |
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107 */ |
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108 CMTPImageDpThumbnailCreator(); |
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109 |
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110 /** |
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111 * 2nd phase constructor. |
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112 */ |
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113 void ConstructL(); |
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114 |
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115 private: |
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116 /** |
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117 FLOGGER debug trace member variable. |
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118 **/ |
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119 __FLOG_DECLARATION_MEMBER_MUTABLE; |
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120 |
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121 enum{ |
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122 EIdle, |
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123 EGetting, |
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124 EGetted, |
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125 EScaling, |
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126 EEncoding} iState; |
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127 TThumbnailRequestId iCurrentReq; |
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128 TInt* iCreationErr; |
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129 CFbsBitmap* iBitmap; |
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130 CImageEncoder* iImgEnc; |
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131 #ifdef MTPTHUMBSCALING |
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132 CBitmapScaler* iScaler; |
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133 #endif |
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134 HBufC8* iData; |
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135 CThumbnailManager* iThumbMgr; |
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136 CThumbnailObjectSource* iObjectSource; |
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137 CMTPTypeOpaqueData* iBuffer; //not owned |
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138 CActiveSchedulerWait* iActiveSchedulerWait; |
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139 }; |
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140 |
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141 #endif // CMTPIMAGEDPTHUMBNAILCREATOR_H |