author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 25 May 2010 12:43:23 +0300 | |
branch | RCL_3 |
changeset 18 | 2e08ef6b6eda |
parent 0 | 040fcad49f44 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2006 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: Loads a slide from file |
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* |
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*/ |
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|
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// INCLUDES |
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#include "SlideshowPluginUtils.h" |
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#include "SlideshowSlideLoader.h" |
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// --------------------------------------------------------------------------- |
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// DivAndRoundUp |
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// --------------------------------------------------------------------------- |
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// |
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TInt DivAndRoundUp(const TInt aNumber, const TInt aDivider) |
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{ |
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TInt result = aNumber / aDivider; |
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if (aNumber % aDivider) |
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{ |
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result += 1; |
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} |
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return result; |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::NewL |
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// --------------------------------------------------------------------------- |
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// |
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CSlideshowSlideLoader* CSlideshowSlideLoader::NewL(CSlideshowSlide *aSlide) |
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{ |
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CSlideshowSlideLoader * self = new (ELeave)CSlideshowSlideLoader(aSlide); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::ConstructL |
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// --------------------------------------------------------------------------- |
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// |
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void CSlideshowSlideLoader::ConstructL() |
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{ |
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// Add this object to active scheduler |
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CActiveScheduler::Add(this); |
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} |
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::CSlideshowSlideLoader |
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// --------------------------------------------------------------------------- |
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// |
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CSlideshowSlideLoader::CSlideshowSlideLoader(CSlideshowSlide *aSlide) |
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: CActive(CActive::EPriorityStandard),iSlide(aSlide) |
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{ |
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// Empty |
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} |
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::~CSlideshowSlideLoader |
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// --------------------------------------------------------------------------- |
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// |
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CSlideshowSlideLoader::~CSlideshowSlideLoader() |
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{ |
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if(IsActive()) |
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{ |
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Cancel(); |
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} |
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} |
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::DeleteDecoder |
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// --------------------------------------------------------------------------- |
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// |
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void CSlideshowSlideLoader::DeleteDecoder() |
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{ |
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if(iDecoder) |
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{ |
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delete iDecoder; |
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iDecoder = NULL; |
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} |
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} |
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::DoCancel |
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// --------------------------------------------------------------------------- |
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// |
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void CSlideshowSlideLoader::DoCancel() |
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{ |
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iDecoder->Cancel(); |
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DeleteDecoder(); |
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// delete the image |
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109 |
if(iSlide->iImage) |
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110 |
{ |
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|
111 |
delete iSlide->iImage; |
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112 |
iSlide->iImage = NULL; |
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113 |
} |
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114 |
} |
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115 |
|
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116 |
// --------------------------------------------------------------------------- |
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117 |
// CSlideshowSlideLoader::RunL |
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118 |
// --------------------------------------------------------------------------- |
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119 |
// |
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120 |
void CSlideshowSlideLoader::RunL() |
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121 |
{ |
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122 |
// delete the decoder to save some memory. |
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DeleteDecoder(); |
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124 |
if(iStatus != KErrNone) |
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125 |
{ |
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iSlide->ReleaseImage(); |
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// SSS_DECODEFAILED says that Image could not be decoded. Corrupted image. |
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(iSlide->iFlags) |= SSS_DECODEFAILED; |
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129 |
return; |
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130 |
} |
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131 |
|
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132 |
// Image loaded, size scaled down while loading. Find out, if the |
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133 |
// image still needs to be scaled smaller to fit the screen |
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|
134 |
|
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TReal aspectRatio = (TReal) iBitmapsize.iWidth / (TReal) iBitmapsize.iHeight; |
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|
136 |
|
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if ((iBitmapsize.iWidth <= iTargetSize.iWidth) && |
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(iBitmapsize.iHeight <= iTargetSize.iHeight)) |
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|
139 |
{ |
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140 |
// Fits completely - finish |
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141 |
SSPLOGGER_WRITE("No resize needed"); |
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|
142 |
|
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|
143 |
// Compress the heap after imageconversion as |
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144 |
// imagedecoder seems to leave heap uncompressed |
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145 |
User::Heap().Compress(); |
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|
146 |
(iSlide->iFlags) |= SSS_IMAGELOADED; |
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147 |
return; |
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148 |
} |
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|
149 |
|
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150 |
// Figure out which dimension needs most scaling |
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|
151 |
TReal xFactor = (TReal) iTargetSize.iWidth / (TReal) iBitmapsize.iWidth; |
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|
152 |
TReal yFactor = (TReal) iTargetSize.iHeight / (TReal) iBitmapsize.iHeight; |
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|
153 |
|
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|
154 |
// Start with target (screen) size |
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|
155 |
TSize finalSize = iTargetSize; |
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|
156 |
|
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|
157 |
if (xFactor <= yFactor) |
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|
158 |
{ |
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|
159 |
// X-dimension needs most scaling - fit to x, re-calc y |
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|
160 |
finalSize.iHeight = (TInt) ((TReal) finalSize.iWidth / aspectRatio); |
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|
161 |
} |
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162 |
else |
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|
163 |
{ |
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|
164 |
// Y-dimension needs most scaling - fit to y, re-calc x |
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|
165 |
finalSize.iWidth = (TInt) ((TReal) finalSize.iHeight * aspectRatio); |
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|
166 |
} |
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|
167 |
|
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|
168 |
SSPLOGGER_WRITEF(_L("SSP: Final size (%d, %d)"), |
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|
169 |
finalSize.iWidth, finalSize.iHeight); |
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|
170 |
|
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|
171 |
// Create a final bitmap with the final size, and draw to it |
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|
172 |
CFbsBitmap* finalBmp = new (ELeave) CFbsBitmap; |
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|
173 |
CleanupStack::PushL(finalBmp); |
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|
174 |
User::LeaveIfError(finalBmp->Create(finalSize, (iSlide->iImage)->DisplayMode())); |
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|
175 |
|
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|
176 |
CFbsBitmapDevice* bmpDev = CFbsBitmapDevice::NewL(finalBmp); |
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|
177 |
CleanupStack::PushL(bmpDev); |
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|
178 |
|
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|
179 |
CFbsBitGc* bmpCxt; |
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|
180 |
User::LeaveIfError(bmpDev->CreateContext(bmpCxt)); |
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|
181 |
CleanupStack::PushL(bmpCxt); |
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|
182 |
bmpCxt->DrawBitmap(TRect(0, 0, finalSize.iWidth, finalSize.iHeight), |
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|
183 |
(iSlide->iImage), |
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|
184 |
TRect(0, 0, iBitmapsize.iWidth, iBitmapsize.iHeight)); |
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|
185 |
|
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|
186 |
CleanupStack::PopAndDestroy(2); // bmpDev, bmpCxt |
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|
187 |
// Return the result in the original bitmap parameter |
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|
188 |
(iSlide->iImage)->Reset(); |
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|
189 |
|
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|
190 |
User::LeaveIfError((iSlide->iImage)->Duplicate(finalBmp->Handle())); |
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|
191 |
CleanupStack::PopAndDestroy(finalBmp); |
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|
192 |
// Compress the heap after imageconversion as |
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|
193 |
// imagedecoder seems to leave heap uncompressed |
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|
194 |
User::Heap().Compress(); |
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|
195 |
(iSlide->iFlags) |= SSS_IMAGELOADED; |
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|
196 |
return; |
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|
197 |
} |
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|
198 |
|
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|
199 |
// --------------------------------------------------------------------------- |
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|
200 |
// CSlideshowSlideLoader::LoadSlideL |
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|
201 |
// --------------------------------------------------------------------------- |
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|
202 |
// |
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|
203 |
void CSlideshowSlideLoader::LoadSlideL( |
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|
204 |
const TDesC& aFilename, const TSize& aTargetSize) |
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|
205 |
{ |
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|
206 |
|
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|
207 |
iTargetSize = aTargetSize; |
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|
208 |
RFs filesys; |
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|
209 |
User::LeaveIfError(filesys.Connect()); |
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|
210 |
CleanupClosePushL(filesys); |
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|
211 |
// this line can leave if decoder is not found..need to cacth this. |
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|
212 |
iDecoder = CImageDecoder::FileNewL(filesys, aFilename, ContentAccess::EView,CImageDecoder::EOptionAlwaysThread); |
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|
213 |
if (aTargetSize == TSize(-1,-1)) |
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{ |
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CleanupStack::PopAndDestroy(&filesys); |
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iDecoder = NULL; |
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return; |
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} |
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|
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// Get image information |
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TFrameInfo frameinfo = iDecoder->FrameInfo(); |
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TDisplayMode mode; |
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|
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// Tone down colors if possible (saves memory) |
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if (frameinfo.iFlags & TFrameInfo::ECanDither) |
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{ |
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mode = EColor64K; |
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} |
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else |
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230 |
{ |
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mode = frameinfo.iFrameDisplayMode; |
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} |
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|
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// Find out if the image can be downscaled during loading |
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iBitmapsize = frameinfo.iOverallSizeInPixels; |
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|
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|
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if ((iBitmapsize.iWidth >= aTargetSize.iWidth * 2) && |
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(iBitmapsize.iHeight >= aTargetSize.iHeight * 2)) |
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{ |
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// 1/2 size |
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iBitmapsize.iWidth = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iWidth, 2); |
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iBitmapsize.iHeight = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iHeight, 2); |
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|
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if ((iBitmapsize.iWidth >= aTargetSize.iWidth * 2) && |
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(iBitmapsize.iHeight >= aTargetSize.iHeight * 2)) |
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{ |
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// 1/4 size |
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iBitmapsize.iWidth = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iWidth, 4); |
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iBitmapsize.iHeight = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iHeight, 4); |
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|
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if ((iBitmapsize.iWidth >= aTargetSize.iWidth * 2) && |
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(iBitmapsize.iHeight >= aTargetSize.iHeight * 2)) |
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{ |
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// 1/8 size |
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iBitmapsize.iWidth = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iWidth, 8); |
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iBitmapsize.iHeight = DivAndRoundUp(frameinfo.iOverallSizeInPixels.iHeight, 8); |
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} |
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} |
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} |
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|
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// Create a target bitmap |
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iSlide->iImage = new (ELeave) CFbsBitmap; |
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User::LeaveIfError((iSlide->iImage)->Create(iBitmapsize, mode)); |
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// for filesys |
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CleanupStack::PopAndDestroy(&filesys); |
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|
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//Start decoding the image ... |
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// RunL method is called when decoding is done. |
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iDecoder->Convert(&iStatus, *(iSlide->iImage),0); |
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SetActive(); |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CSlideshowSlideLoader::RunError |
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// --------------------------------------------------------------------------- |
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// |
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TInt CSlideshowSlideLoader::RunError(TInt aError) |
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{ |
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if (NULL != iSlide->iImage) |
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{ |
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delete iSlide->iImage; |
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iSlide->iImage = NULL; |
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} |
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return aError; |
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} |