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1 /* |
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2 * Copyright (c) 2006-2007 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: Task for scaling thumbnails |
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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 THUMBNAILSCALETASK_H |
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20 #define THUMBNAILSCALETASK_H |
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21 |
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22 #include "thumbnailtask.h" |
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23 #include "thumbnailprovider.h" |
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24 #include "thumbnailstore.h" // TThumbnailPersistentSize |
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25 |
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26 class CThumbnailServer; |
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27 |
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28 /** |
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29 * Task for scaling thumbnails. |
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30 * |
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31 * @since S60 v5.0 |
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32 */ |
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33 class CThumbnailScaleTask: public CThumbnailTask |
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34 { |
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35 public: |
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36 |
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37 /** |
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38 * Two-phased constructor |
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39 * |
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40 * @since S60 v5.0 |
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41 * @param aProcessor Processor object for running tasks. |
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42 * @param aServer Server to use. |
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43 * @param aFilename Filename of file from which the thumbnail is to be |
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44 * created. |
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45 * @param aBitmap Bitmap image. Scale task assumes ownership. |
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46 * @param aOriginalSize Original size of the image. |
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47 * @param aTargetSize Target size of thumbnail image. |
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48 * @param aCrop Enable or disable cropping. |
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49 * @param aDisplayMode Display mode. |
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50 * @param aPriority Priority of the request. |
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51 * @param aThumbnailSize Prededined size of thumbnail. |
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52 * @return New CThumbnailScaleTask object. |
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53 * @param aEXIF is origin EXIF. |
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54 */ |
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55 static CThumbnailScaleTask* NewL( CThumbnailTaskProcessor& aProcessor, |
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56 CThumbnailServer& aServer, const TDesC& aFilename, CFbsBitmap* aBitmap, |
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57 const TSize& aOriginalSize, const TSize& aTargetSize, TBool aCrop, |
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58 TDisplayMode aDisplayMode, TInt aPriority, const TDesC& aTargetUri, |
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59 const TThumbnailSize aThumbnailSize, const TThumbnailId aThumbnailId, |
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60 const TBool aBitmapToPool, const TBool aEXIF); |
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61 |
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62 /** |
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63 * Destructor |
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64 * |
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65 * @since S60 v5.0 |
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66 */ |
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67 virtual ~CThumbnailScaleTask(); |
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68 |
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69 /** |
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70 * StartL |
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71 * |
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72 * @since S60 v5.0 |
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73 */ |
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74 void StartL(); |
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75 |
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76 /** |
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77 * Handles an active object's request completion event. |
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78 * |
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79 * @since S60 v5.0 |
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80 */ |
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81 void RunL(); |
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82 |
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83 /** |
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84 * Implements cancellation of an outstanding request. |
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85 * |
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86 * @since S60 v5.0 |
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87 */ |
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88 void DoCancel(); |
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89 |
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90 /** |
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91 * Changes priority of the task. |
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92 * |
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93 * @since S60 v5.0 |
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94 */ |
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95 void ChangeTaskPriority( TInt aNewPriority ); |
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96 |
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97 /** |
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98 * Set whether the scaled image is to be stored or not. |
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99 * |
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100 * @since S60 v5.0 |
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101 * @param aDoStore Boolean value stating should the image be stored. |
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102 */ |
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103 void SetDoStore( TBool aDoStore ); |
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104 |
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105 private: |
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106 |
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107 /** |
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108 * C++ default constructor |
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109 * |
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110 * @since S60 v5.0 |
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111 * @param aProcessor Processor object for running tasks. |
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112 * @param aServer Server to use. |
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113 * @param aFilename Filename of file from which the thumbnail is to be |
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114 * created. |
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115 * @param aBitmap Bitmap image. Scale task assumes ownership. |
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116 * @param aOriginalSize Original size of the image. |
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117 * @param aTargetSize Target size of thumbnail image. |
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118 * @param aCrop Enable or disable cropping. |
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119 * @param aDisplayMode Display mode. |
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120 * @param aPriority Priority of the request. |
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121 * @param aThumbnailSize Prededined size of thumbnail. |
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122 * @return New CThumbnailScaleTask object. |
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123 * @param aEXIF is origin EXIF. |
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124 */ |
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125 CThumbnailScaleTask( CThumbnailTaskProcessor& aProcessor, CThumbnailServer& |
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126 aServer, const TDesC& aFilename, CFbsBitmap* aBitmap, const TSize& |
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127 aOriginalSize, const TSize& aTargetSize, TBool aCrop, TDisplayMode |
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128 aDisplayMode, TInt aPriority, const TDesC& aTargetUri, |
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129 const TThumbnailSize aThumbnailSize, const TThumbnailId aThumbnailId, |
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130 const TBool aBitmapToPool, const TBool aEXIF); |
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131 |
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132 /** |
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133 * Symbian 2nd phase constructor can leave. |
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134 * |
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135 * @since S60 v5.0 |
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136 */ |
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137 void ConstructL(); |
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138 |
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139 /** |
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140 * Calculates target size to be used for the thumbnail when cropping is |
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141 * disabled. The target size may be smaller than requested if aspect |
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142 * ratios do not match. Updates iTargetSize. |
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143 * |
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144 * @since S60 v5.0 |
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145 */ |
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146 void CalculateTargetSize(); |
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147 |
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148 /** |
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149 * Calculates cropping rectangle to be used for the thumbnail when |
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150 * cropping is enabled. Target size will always be the same as requested |
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151 * size and the cropping rectangle defines which area of the image will |
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152 * be visible. Updates iCropRectangle. |
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153 * |
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154 * @since S60 v5.0 |
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155 */ |
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156 void CalculateCropRectangle(); |
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157 |
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158 /** |
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159 * StoreAndCompleteL |
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160 * |
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161 * @since S60 v5.0 |
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162 */ |
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163 void StoreAndCompleteL(); |
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164 |
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165 private: |
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166 // Data |
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167 |
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168 /** |
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169 * Server. |
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170 */ |
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171 CThumbnailServer& iServer; |
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172 |
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173 /** |
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174 * Resides in bitmap pool. |
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175 * Not own. But we do are responsible for decreasing the reference count |
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176 * if iBitmapInPool is set. |
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177 */ |
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178 CFbsBitmap* iBitmap; |
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179 |
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180 /** |
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181 * Temporary place to store the original bitmap. This is set to NULL |
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182 * after the bitmap has been successfully added to the bitmap pool. |
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183 * Own. |
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184 */ |
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185 CFbsBitmap* iOwnBitmap; |
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186 |
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187 /** |
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188 * Bitmap pool. |
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189 */ |
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190 TBool iBitmapInPool; |
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191 |
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192 /** |
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193 * Original size of media object. |
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194 */ |
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195 TSize iOriginalSize; |
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196 |
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197 /** |
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198 * Target size of the thumbnail. |
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199 */ |
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200 TSize iTargetSize; |
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201 |
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202 /** |
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203 * Incidates if cropping is enabled. |
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204 */ |
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205 TBool iCrop; |
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206 |
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207 /** |
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208 * Defines the visible area of iBitmap which is to be included |
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209 * in the thumbnail if cropping is enabled. Not used if cropping |
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210 * is disabled. |
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211 */ |
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212 TRect iCropRectangle; |
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213 |
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214 /** |
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215 * Display mode. |
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216 */ |
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217 TDisplayMode iDisplayMode; |
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218 |
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219 /** |
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220 * Filename of the image to be used. |
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221 */ |
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222 TFileName iFilename; |
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223 |
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224 /** |
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225 * Uri of the target object |
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226 */ |
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227 TFileName iTargetUri; |
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228 |
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229 /** |
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230 * Scaled image. |
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231 */ |
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232 CFbsBitmap* iScaledBitmap; // own |
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233 |
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234 /** |
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235 * If set, scaled bitmap must be released from pool. |
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236 */ |
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237 TInt iScaledBitmapHandle; |
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238 |
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239 /** |
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240 * If set, thumbnail will be stored for later use. |
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241 */ |
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242 TBool iDoStore; |
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243 |
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244 /** |
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245 * Temporary buffer for client/server parameters |
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246 */ |
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247 TThumbnailRequestParamsPckgBuf iParamsBuf; |
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248 |
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249 /** |
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250 * Size of requested Thumbnail |
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251 */ |
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252 TThumbnailSize iThumbnailSize; |
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253 |
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254 /** |
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255 * MDS ID of requested Thumbnail |
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256 */ |
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257 TThumbnailId iThumbnailId; |
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258 |
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259 /** |
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260 * Add bitmap to server's pool. |
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261 */ |
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262 TBool iBitmapToPool; |
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263 |
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264 #ifdef _DEBUG |
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265 TTime aStart, aStop; |
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266 #endif |
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267 |
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268 /** |
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269 * Is origin EXIF. |
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270 */ |
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271 TBool iEXIF; |
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272 }; |
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273 |
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274 #endif // THUMBNAILSCALETASK_H |