author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 15 Jul 2010 19:53:20 +0300 | |
branch | RCL_3 |
changeset 91 | 30342f40acbf |
parent 37 | cb62a4f66ebe |
child 65 | 5bfc169077b2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2008 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 the License "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: |
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* |
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*/ |
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|
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|
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#include "StaticImageDecoder.h" |
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#include "MaskedBitmap.h" |
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#include <imageconversion.h> |
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#include <eikenv.h> |
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#include <fbs.h> |
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#include "oom.h" |
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// CONSTANTS |
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// block all images that would take free ram below this amount when decoded |
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const TInt KFreeRamBitmapBlockLimit = 1536 * 1024; |
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// do the following additional checks if image would take free ram below this amount |
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const TInt KFreeRamBitmapCheckLimit = 7 * 1024 * 1024; |
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// if bitmap size is times this much bigger than data size then it is a high expansion bitmap |
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const TInt KHighExpansionBitmapFactor = 16; |
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// block high expansion bitmap above this size (they are usually backgrounds and so less important) |
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const TInt KLargeHighExpansionBitmapSize = 800*600*2; |
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// block all images that would take more than this percentage of available free ram |
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const TInt KMaxBitmapRamPercent = 25; |
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|
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//============================================================================= |
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// CRawData |
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//============================================================================= |
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CRawData* CRawData::NewL( const TDesC8& aData, TDesC* aMime, CMaskedBitmap* aTarget, MAnimationDecoderObserver* aObserv ) |
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{ |
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CRawData* self = new (ELeave) CRawData(); |
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CleanupStack::PushL( self ); |
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self->ConstructL( aData, aMime, aTarget, aObserv ); |
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CleanupStack::Pop(); |
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return self; |
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} |
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|
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void CRawData::ConstructL( const TDesC8& aData, TDesC* aMIMEType, CMaskedBitmap* aTarget, MAnimationDecoderObserver* aObserv ) |
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{ |
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// mime type |
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if (aMIMEType) |
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{ |
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// it is safer to ignore the server supplied mime type and just recognize |
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// the image type from the data headers. this does not work for all formats though |
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if ( *aMIMEType==KMimeWBMP || *aMIMEType==KMimeOTA || *aMIMEType==KMimeWMF) |
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{ |
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// convert to 8 bit |
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iMime = HBufC8::NewL(aMIMEType->Length()); |
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iMime->des().Copy(*aMIMEType); |
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} |
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} |
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// data |
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const TUint8* src = aData.Ptr(); |
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iData = MemoryManager::Alloc( aData.Length() ); |
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Mem::Copy( iData, src, aData.Length() ); |
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iDataPtr.Set((TUint8*)iData, aData.Length(), aData.Length() ); |
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iObserver = aObserv; |
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iTarget = aTarget; |
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} |
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CRawData::~CRawData() |
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{ |
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MemoryManager::Free( iData ); |
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delete iMime; |
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} |
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//============================================================================= |
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// CStaticImageDecoder |
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//============================================================================= |
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CStaticImageDecoder::CStaticImageDecoder() : CActive(CActive::EPriorityStandard) |
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{ |
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CActiveScheduler::Add( this ); |
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} |
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CStaticImageDecoder* CStaticImageDecoder::NewL() |
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{ |
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CStaticImageDecoder* self = new (ELeave) CStaticImageDecoder(); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop(); |
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return self; |
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} |
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CStaticImageDecoder::~CStaticImageDecoder() |
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{ |
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iQueue.Reset(); |
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delete iDecoder; |
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iContext = 0; |
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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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109 |
|
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void CStaticImageDecoder::ConstructL() |
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{ |
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iDecoder = CBufferedImageDecoder::NewL(CEikonEnv::Static()->FsSession()); |
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} |
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114 |
|
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TBool CStaticImageDecoder::LoadNextImage() |
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{ |
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if( iQueue.Count() == 0 ) return EFalse; |
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|
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// load the data, FIFO |
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CRawData* data = iQueue[0]; |
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|
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TRAP_IGNORE( |
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if( data->iMime ) |
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iDecoder->OpenL( data->iDataPtr, *(data->iMime), CImageDecoder::EOptionNone ); |
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125 |
else |
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iDecoder->OpenL( data->iDataPtr, CImageDecoder::EOptionNone ); |
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) |
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128 |
|
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// set the context |
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if(iDecoder->ValidDecoder() && iDecoder->IsImageHeaderProcessingComplete()) |
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{ |
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if( iDecoder->FrameCount() == 1 ) |
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{ |
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iContext = data; |
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TFrameInfo frmInfo = iDecoder->FrameInfo( 0 ); |
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136 |
|
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// check memory before creating bitmaps |
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if( CheckBitmapMemoryConsumption( frmInfo ) ) |
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{ |
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if (frmInfo.iFlags & TFrameInfo::ETransparencyPossible) |
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{ |
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TDisplayMode mskMode = (frmInfo.iFlags & TFrameInfo::EAlphaChannel) ? EGray256 : EGray2; |
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iContext->iTarget->Create( frmInfo.iOverallSizeInPixels, GetBestDisplayMode(frmInfo.iFrameDisplayMode), mskMode ); |
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} |
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else |
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146 |
{ |
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iContext->iTarget->Create( frmInfo.iOverallSizeInPixels, GetBestDisplayMode(frmInfo.iFrameDisplayMode) ); |
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} |
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|
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LoadOneFrame(); |
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return ETrue; |
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} |
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} |
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else |
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155 |
{ |
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// animated images need a dedicated decoder |
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data->iObserver->StartAnimationDecoder(); |
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|
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iQueue.Remove( 0 ); |
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Reset(); |
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|
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StartLoading(); |
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return ETrue; |
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} |
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} |
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|
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// something must be wrong with the current image |
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data->iObserver->decoderError( -1 ); |
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iQueue.Remove(0); |
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|
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// decode next image |
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Reset(); |
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StartLoading(); |
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|
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return ETrue; |
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} |
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|
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void CStaticImageDecoder::LoadOneFrame() |
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{ |
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// static image has only one frame; |
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const TFrameInfo& frameInfo = iDecoder->FrameInfo( 0 ); |
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CFbsBitmap& bmp = iContext->iTarget->BitmapModifyable(); |
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if ( frameInfo.iFlags & TFrameInfo::ETransparencyPossible ) |
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184 |
{ |
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CFbsBitmap& msk = iContext->iTarget->MaskModifyable(); |
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iDecoder->Convert( &iStatus, bmp, msk, 0 ); |
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} |
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else |
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189 |
{ |
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iDecoder->Convert( &iStatus, bmp, 0 ); |
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} |
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192 |
|
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// the first frame, partial information is available |
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iContext->iObserver->PartialImage(); |
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|
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SetActive(); |
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iState = EOneFrameReady; |
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} |
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199 |
|
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TBool CStaticImageDecoder::DecodeL( CRawData* aData ) |
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201 |
{ |
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// queue the data, FIFO |
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iQueue.AppendL( aData ); |
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StartLoading(); |
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return ETrue; |
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} |
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|
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void CStaticImageDecoder::StartLoading() |
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209 |
{ |
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if( !IsActive() ) |
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{ |
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// initalize decoding |
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TRequestStatus* status = &iStatus; |
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User::RequestComplete( status, 0 ); |
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SetActive(); |
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iState = EStartLoading; |
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} |
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218 |
} |
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|
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void CStaticImageDecoder::RunL() |
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{ |
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if( iState == EStartLoading ) |
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{ |
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LoadNextImage(); |
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} |
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else if( iState == EOneFrameReady ) |
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{ |
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if( iStatus.Int() != KErrNone ) |
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229 |
{ |
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iContext->iObserver->decoderError( iStatus.Int() ); |
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|
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iQueue.Remove(0); |
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|
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// decode next image |
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Reset(); |
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if( iQueue.Count() > 0 ) LoadNextImage(); |
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} |
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else |
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{ |
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// pass bitmap's ownership to the observer |
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iContext->iObserver->ImageReady(); |
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|
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iQueue.Remove(0); |
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|
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// decode next image |
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Reset(); |
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if( iQueue.Count() > 0 ) LoadNextImage(); |
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} |
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} |
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} |
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251 |
|
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void CStaticImageDecoder::DoCancel() |
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{ |
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// TODO: maybe we should delete all the intermediate data? |
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} |
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|
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void CStaticImageDecoder::Reset() |
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{ |
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// decoder reset |
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iDecoder->Cancel(); |
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iDecoder->Reset(); |
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iState = EIdle; |
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263 |
|
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// context reset |
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iContext = 0; |
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} |
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267 |
|
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void CStaticImageDecoder::StopObserving( MAnimationDecoderObserver* aObserv ) |
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269 |
{ |
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// fast check |
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if( iQueue.Count() == 0 ) return; |
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|
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// is the image currently being decoded? |
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if( iContext && iContext->iObserver == aObserv ) |
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{ |
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// stop decoding |
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if( IsActive() ) Cancel(); |
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} |
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279 |
|
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// remove image data from the queue |
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TInt idx = KErrNotFound; |
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for( TInt i=0; i<iQueue.Count(); ++i ) |
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if( iQueue[i]->iObserver == aObserv ) |
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idx = i; |
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if( idx == KErrNotFound ) return; |
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|
286 |
|
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CRawData* data = iQueue[idx]; |
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iQueue.Remove( idx ); |
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|
289 |
|
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|
290 |
// decode next image |
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291 |
Reset(); |
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if( iQueue.Count() > 0 ) StartLoading(); |
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293 |
} |
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|
294 |
|
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TDisplayMode CStaticImageDecoder::GetBestDisplayMode( TDisplayMode /*aMode*/ ) const |
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296 |
{ |
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return EColor64K; |
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298 |
} |
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|
299 |
|
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TBool CStaticImageDecoder::CheckBitmapMemoryConsumption( const TFrameInfo& aFrameInfo ) const |
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301 |
{ |
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TMemoryInfoV1Buf info; |
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303 |
UserHal::MemoryInfo( info ); |
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TInt freeRamInBytes = 10*1024*1024; |
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TInt dataSize = iContext->iDataPtr.Length(); |
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if( UserHal::MemoryInfo( info ) == KErrNone ) |
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freeRamInBytes = info().iFreeRamInBytes; |
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TInt bitmapBytes = aFrameInfo.iOverallSizeInPixels.iWidth*aFrameInfo.iOverallSizeInPixels.iHeight*2; |
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TInt freeRamAfterLoad = freeRamInBytes-bitmapBytes; |
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if (freeRamAfterLoad < KFreeRamBitmapBlockLimit) |
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|
311 |
{ |
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312 |
// block image decoding when we are below block limit |
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|
313 |
return EFalse; |
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|
314 |
} |
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|
315 |
if (freeRamAfterLoad < KFreeRamBitmapCheckLimit) |
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|
316 |
{ |
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|
317 |
// low on memory, do additional checks |
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|
318 |
if (dataSize*KHighExpansionBitmapFactor < bitmapBytes && bitmapBytes>KLargeHighExpansionBitmapSize ) |
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|
319 |
{ |
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|
320 |
// bitmaps with high expansion factor are commonly used as background image etc. and are of less importance |
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|
321 |
// block large ones |
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|
322 |
return EFalse; |
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|
323 |
} |
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|
324 |
if (freeRamInBytes*KMaxBitmapRamPercent/100 < bitmapBytes) |
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|
325 |
{ |
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|
326 |
// block all bitmaps that would consume more than this percent of available memory |
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|
327 |
return EFalse; |
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|
328 |
} |
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|
329 |
} |
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|
330 |
return ETrue; |
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|
331 |
} |
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Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
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Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
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333 |
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