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: Thumbnail save task implementation |
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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 31/07/2007 by Simon Brooks |
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22 */ |
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23 |
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24 // INCLUDE FILES |
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25 |
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26 #include "glxtnsavethumbnailtask.h" |
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27 |
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28 #include <glxassert.h> |
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29 #include <glxtracer.h> |
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30 #include <glxthumbnail.h> |
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31 #include <imageconversion.h> |
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32 #include <s32mem.h> |
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33 |
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34 #include "glxtnfileinfo.h" |
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35 #include "mglxtnstorage.h" |
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36 |
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37 // Minimum size of thumbnail to be saved as JPEG rather than bitmap |
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38 const TInt KGlxMinPixelsForJpeg = 30000; |
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39 |
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40 const TInt KGlxBitmapBufferGranularity = 1024; |
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41 |
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42 // ============================ MEMBER FUNCTIONS =============================== |
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43 |
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44 // ----------------------------------------------------------------------------- |
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45 // CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask |
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46 // C++ default constructor can NOT contain any code, that might leave. |
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47 // ----------------------------------------------------------------------------- |
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48 // |
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49 CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxMediaId& aItemId, |
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50 const TSize& aSize, MGlxtnThumbnailStorage* aStorage) : |
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51 CGlxtnTask(KGlxtnTaskIdSaveThumbnail, aItemId, aStorage), iSize(aSize) |
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52 { |
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53 TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()"); |
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54 GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ), |
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55 "CGlxtnSaveThumbnailTask created without storage" ); |
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56 |
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57 // Save task is always low priority |
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58 SetPriority(EPriorityLow); |
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59 } |
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60 |
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61 // ----------------------------------------------------------------------------- |
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62 // CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask |
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63 // Constructor for derived classes. |
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64 // ----------------------------------------------------------------------------- |
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65 // |
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66 CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxtnTaskId& aId, |
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67 const TGlxMediaId& aItemId, MGlxtnThumbnailStorage* aStorage) : |
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68 CGlxtnTask(aId, aItemId, aStorage) |
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69 { |
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70 TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()"); |
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71 GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ), |
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72 "CGlxtnSaveThumbnailTask created without storage" ); |
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73 } |
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74 |
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75 // ----------------------------------------------------------------------------- |
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76 // CGlxtnSaveThumbnailTask::ConstructL |
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77 // Symbian 2nd phase constructor can leave. |
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78 // ----------------------------------------------------------------------------- |
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79 // |
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80 void CGlxtnSaveThumbnailTask::ConstructL(CGlxtnFileInfo* aFileInfo, |
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81 CFbsBitmap* aThumbnail) |
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82 { |
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83 TRACER("void CGlxtnSaveThumbnailTask::ConstructL()"); |
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84 // Shouldn't create save task if client doesn't use storage |
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85 if ( !(Storage() && aFileInfo && aThumbnail) ) |
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86 { |
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87 User::Leave(KErrArgument); |
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88 } |
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89 |
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90 // Must not leave after taking ownership of these |
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91 iFileInfo = aFileInfo; |
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92 iThumbnail = aThumbnail; |
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93 } |
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94 |
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95 // ----------------------------------------------------------------------------- |
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96 // CGlxtnSaveThumbnailTask::NewL |
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97 // Two-phased constructor. |
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98 // ----------------------------------------------------------------------------- |
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99 // |
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100 CGlxtnSaveThumbnailTask* CGlxtnSaveThumbnailTask::NewL( |
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101 const TGlxMediaId& aItemId, |
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102 CGlxtnFileInfo* aFileInfo, const TSize& aSize, |
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103 CFbsBitmap* aThumbnail, MGlxtnThumbnailStorage* aStorage) |
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104 { |
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105 TRACER("CGlxtnSaveThumbnailTask* CGlxtnSaveThumbnailTask::NewL()"); |
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106 CGlxtnSaveThumbnailTask* self = new (ELeave) CGlxtnSaveThumbnailTask( |
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107 aItemId, aSize, aStorage); |
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108 CleanupStack::PushL(self); |
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109 self->ConstructL(aFileInfo, aThumbnail); |
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110 CleanupStack::Pop( self ); |
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111 |
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112 return self; |
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113 } |
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114 |
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115 // Destructor |
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116 CGlxtnSaveThumbnailTask::~CGlxtnSaveThumbnailTask() |
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117 { |
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118 TRACER("Destructor CGlxtnSaveThumbnailTask::~CGlxtnSaveThumbnailTask()"); |
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119 delete iEncoder; |
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120 delete iThumbnail; |
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121 delete iData; |
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122 delete iFileInfo; |
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123 } |
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124 |
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125 // ----------------------------------------------------------------------------- |
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126 // DoStartL |
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127 // ----------------------------------------------------------------------------- |
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128 // |
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129 TBool CGlxtnSaveThumbnailTask::DoStartL(TRequestStatus& aStatus) |
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130 { |
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131 TRACER("CGlxtnSaveThumbnailTask::DoStartL()"); |
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132 EncodeThumbnailL(aStatus); |
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133 |
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134 return ETrue; |
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135 } |
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136 |
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137 // ----------------------------------------------------------------------------- |
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138 // DoCancel |
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139 // ----------------------------------------------------------------------------- |
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140 // |
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141 void CGlxtnSaveThumbnailTask::DoCancel() |
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142 { |
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143 TRACER("CGlxtnSaveThumbnailTask::DoCancel()"); |
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144 if ( iEncoder ) |
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145 { |
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146 iEncoder->Cancel(); |
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147 } |
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148 |
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149 Storage()->StorageCancel(); |
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150 } |
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151 |
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152 // ----------------------------------------------------------------------------- |
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153 // DoRunL |
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154 // ----------------------------------------------------------------------------- |
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155 // |
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156 TBool CGlxtnSaveThumbnailTask::DoRunL(TRequestStatus& aStatus) |
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157 { |
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158 TRACER("TBool CGlxtnSaveThumbnailTask::DoRunL()"); |
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159 if ( KErrNone == aStatus.Int() && EStateEncoding == iState ) |
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160 { |
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161 SaveThumbnailL(aStatus); |
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162 return ETrue; |
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163 } |
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164 |
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165 return EFalse; // Task is complete |
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166 } |
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167 |
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168 // ----------------------------------------------------------------------------- |
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169 // DoRunError |
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170 // ----------------------------------------------------------------------------- |
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171 // |
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172 TBool CGlxtnSaveThumbnailTask::DoRunError(TInt /*aError*/) |
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173 { |
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174 TRACER("CGlxtnSaveThumbnailTask::DoRunError()"); |
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175 delete iEncoder; |
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176 iEncoder = NULL; |
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177 |
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178 return EFalse; // Task is complete |
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179 } |
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180 |
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181 // ----------------------------------------------------------------------------- |
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182 // EncodeThumbnailL |
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183 // ----------------------------------------------------------------------------- |
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184 // |
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185 void CGlxtnSaveThumbnailTask::EncodeThumbnailL(TRequestStatus& aStatus) |
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186 { |
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187 TRACER("CGlxtnSaveThumbnailTask::EncodeThumbnailL()"); |
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188 TSize size(iThumbnail->SizeInPixels()); |
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189 User::LeaveIfError(iThumbnail->SetDisplayMode(KGlxThumbnailDisplayMode)); |
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190 |
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191 delete iData; |
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192 iData = NULL; |
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193 |
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194 if ( KGlxMinPixelsForJpeg <= size.iWidth * size.iHeight ) |
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195 { |
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196 // Encode as JPEG |
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197 iFormat = EGlxIDF_JPEG; |
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198 delete iEncoder; |
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199 iEncoder = NULL; |
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200 iEncoder = CImageEncoder::DataNewL(iData, CImageEncoder::EOptionNone, |
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201 KImageTypeJPGUid); |
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202 iState = EStateEncoding; |
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203 iEncoder->Convert(&aStatus, *iThumbnail); |
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204 } |
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205 else |
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206 { |
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207 // Externalise bitmap into buffer |
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208 iFormat = EGlxIDF_Bitmap; |
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209 CBufBase* buffer = CBufSeg::NewL(KGlxBitmapBufferGranularity); |
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210 CleanupStack::PushL(buffer); |
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211 |
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212 RBufWriteStream stream(*buffer); |
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213 CleanupClosePushL(stream); |
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214 stream << *iThumbnail; |
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215 stream.CommitL(); |
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216 CleanupStack::PopAndDestroy(&stream); |
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217 |
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218 TInt length = buffer->Size(); |
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219 iData = HBufC8::NewL(length); |
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220 TPtr8 ptr(iData->Des()); |
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221 buffer->Read(0, ptr, length); |
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222 |
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223 CleanupStack::PopAndDestroy(buffer); |
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224 |
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225 SaveThumbnailL(aStatus); |
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226 } |
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227 } |
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228 |
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229 // ----------------------------------------------------------------------------- |
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230 // SaveThumbnailL |
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231 // ----------------------------------------------------------------------------- |
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232 // |
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233 void CGlxtnSaveThumbnailTask::SaveThumbnailL(TRequestStatus& aStatus) |
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234 { |
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235 TRACER("CGlxtnSaveThumbnailTask::SaveThumbnailL()"); |
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236 delete iEncoder; |
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237 iEncoder = NULL; |
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238 |
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239 iState = EStateSaving; |
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240 Storage()->SaveThumbnailDataL(*iData, iFormat, ItemId(), |
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241 *iFileInfo, iSize, &aStatus); |
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242 } |
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243 |
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244 // End of File |
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