author | hgs |
Mon, 27 Sep 2010 15:13:20 +0530 | |
changeset 69 | 45459746d5e8 |
parent 23 | 74c9f037fd5d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Thumbnail save task implementation |
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* |
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*/ |
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/** |
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* @internal reviewed 31/07/2007 by Simon Brooks |
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*/ |
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// INCLUDE FILES |
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#include "glxtnsavethumbnailtask.h" |
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#include <glxassert.h> |
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#include <glxtracer.h> |
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#include <glxthumbnail.h> |
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#include <imageconversion.h> |
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#include <s32mem.h> |
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#include "glxtnfileinfo.h" |
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#include "mglxtnstorage.h" |
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// Minimum size of thumbnail to be saved as JPEG rather than bitmap |
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const TInt KGlxMinPixelsForJpeg = 30000; |
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const TInt KGlxBitmapBufferGranularity = 1024; |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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// CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask |
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// C++ default constructor can NOT contain any code, that might leave. |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxMediaId& aItemId, |
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const TSize& aSize, MGlxtnThumbnailStorage* aStorage) : |
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CGlxtnTask(KGlxtnTaskIdSaveThumbnail, aItemId, aStorage), iSize(aSize) |
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{ |
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TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()"); |
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GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ), |
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"CGlxtnSaveThumbnailTask created without storage" ); |
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// Save task is always low priority |
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SetPriority(EPriorityLow); |
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} |
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// ----------------------------------------------------------------------------- |
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// CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask |
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// Constructor for derived classes. |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxtnTaskId& aId, |
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const TGlxMediaId& aItemId, MGlxtnThumbnailStorage* aStorage) : |
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CGlxtnTask(aId, aItemId, aStorage) |
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{ |
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TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()"); |
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GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ), |
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"CGlxtnSaveThumbnailTask created without storage" ); |
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} |
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// ----------------------------------------------------------------------------- |
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// CGlxtnSaveThumbnailTask::ConstructL |
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// Symbian 2nd phase constructor can leave. |
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// ----------------------------------------------------------------------------- |
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// |
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void CGlxtnSaveThumbnailTask::ConstructL(CGlxtnFileInfo* aFileInfo, |
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CFbsBitmap* aThumbnail) |
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{ |
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TRACER("void CGlxtnSaveThumbnailTask::ConstructL()"); |
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// Shouldn't create save task if client doesn't use storage |
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if ( !(Storage() && aFileInfo && aThumbnail) ) |
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{ |
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User::Leave(KErrArgument); |
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} |
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// Must not leave after taking ownership of these |
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iFileInfo = aFileInfo; |
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iThumbnail = aThumbnail; |
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} |
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// ----------------------------------------------------------------------------- |
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// CGlxtnSaveThumbnailTask::NewL |
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// Two-phased constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxtnSaveThumbnailTask* CGlxtnSaveThumbnailTask::NewL( |
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const TGlxMediaId& aItemId, |
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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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iFormat = EGlxIDF_Bitmap; |
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CBufBase* buffer = CBufSeg::NewL(KGlxBitmapBufferGranularity); |
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CleanupStack::PushL(buffer); |
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211 |
|
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RBufWriteStream stream(*buffer); |
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CleanupClosePushL(stream); |
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stream << *iThumbnail; |
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stream.CommitL(); |
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CleanupStack::PopAndDestroy(&stream); |
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217 |
|
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TInt length = buffer->Size(); |
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iData = HBufC8::NewL(length); |
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TPtr8 ptr(iData->Des()); |
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buffer->Read(0, ptr, length); |
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222 |
|
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CleanupStack::PopAndDestroy(buffer); |
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|
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SaveThumbnailL(aStatus); |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// SaveThumbnailL |
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// ----------------------------------------------------------------------------- |
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// |
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void CGlxtnSaveThumbnailTask::SaveThumbnailL(TRequestStatus& aStatus) |
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{ |
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TRACER("CGlxtnSaveThumbnailTask::SaveThumbnailL()"); |
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delete iEncoder; |
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iEncoder = NULL; |
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|
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iState = EStateSaving; |
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Storage()->SaveThumbnailDataL(*iData, iFormat, ItemId(), |
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*iFileInfo, iSize, &aStatus); |
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} |
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|
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// End of File |