author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 06 Jul 2010 14:16:16 +0300 | |
changeset 49 | f291796e213d |
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: Common utility for thumbnail attributes |
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* |
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*/ |
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// my include |
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#include "glxthumbnailutility.h" |
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// system includes |
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#include <glxtracer.h> |
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// user includes |
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#include "glxmedia.h" |
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#include "glxthumbnailattributeinfo.h" |
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// --------------------------------------------------------------------------- |
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// ClosestThumbnail |
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// --------------------------------------------------------------------------- |
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// |
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EXPORT_C /*static*/ TInt GlxThumbnailUtility::ClosestThumbnail( |
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const TSize& aDesiredSize, const CGlxMedia& aMedia, TBool aDrmValid ) |
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{ |
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TRACER("GlxThumbnailUtility::ClosestThumbnail"); |
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TInt selectedIndex = KErrNotFound; |
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TInt selectedQuality = 0; |
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TSize selectedSize; // Default constructor sets to zero |
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TInt count = aMedia.Count(); |
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for ( TInt i = 0; i < count; i++ ) |
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{ |
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const TMPXAttribute& attr( aMedia.Attribute( i ) ); |
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// is it a thumbnail |
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if ( GlxThumbnailUtility::IsFullThumbnail( attr )) |
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{ |
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const CGlxThumbnailAttribute* thumbnail |
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= static_cast<const CGlxThumbnailAttribute*>( |
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aMedia.ValueCObject( attr ) ); |
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if ( thumbnail ) |
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{ |
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// Check to see if this is to be the preferred attribute |
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TBool preferThis = ETrue; |
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TInt quality = thumbnail->iThumbnailQuality; |
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TSize size( thumbnail->iDimensions ); |
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// Compare aspect ratios of required size and |
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// this size to decide if using heights or widths |
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if ( size.iHeight * aDesiredSize.iWidth |
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>= aDesiredSize.iHeight * size.iWidth ) |
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{ |
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// using heights |
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preferThis = PreferThisAttribute( size.iHeight, |
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selectedSize.iHeight, aDesiredSize.iHeight, |
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quality, selectedQuality, aDrmValid ); |
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} |
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else |
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{ |
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// using widths |
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preferThis = PreferThisAttribute( size.iWidth, |
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selectedSize.iWidth, aDesiredSize.iWidth, |
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quality, selectedQuality, aDrmValid ); |
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} |
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|
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if ( preferThis ) |
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{ |
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// Set this one as preferred so far |
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selectedIndex = i; |
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selectedQuality = quality; |
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selectedSize = size; |
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} |
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} |
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} |
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} |
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return selectedIndex; |
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} |
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// ----------------------------------------------------------------------------- |
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// IsFullThumbnail |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C /*static*/ TBool GlxThumbnailUtility::IsFullThumbnail(const TMPXAttribute& aAttr) |
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{ |
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TRACER("GlxThumbnailUtility::IsFullThumbnail"); |
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return ((KGlxMediaIdThumbnail == aAttr.ContentId()) |
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&& GlxIsFullThumbnailAttribute(aAttr.AttributeId())); |
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} |
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|
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|
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// ----------------------------------------------------------------------------- |
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// PreferThisAttribute |
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// ----------------------------------------------------------------------------- |
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// |
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/*static*/ TBool GlxThumbnailUtility::PreferThisAttribute( |
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TInt aThisDimen, TInt aSelectedDimen, TInt aReqDimen, |
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TInt aThisQuality, TInt aSelectedQuality, TBool aDrmValid ) |
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{ |
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TRACER("GlxThumbnailUtility::PreferThisAttribute"); |
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|
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TBool preferThis = ETrue; |
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120 |
|
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if ( aThisDimen == aSelectedDimen ) |
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{ |
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// Only interested if better quality |
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preferThis = ( aThisQuality > aSelectedQuality ); |
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} |
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else if ( aThisDimen < aReqDimen ) |
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{ |
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// Only interested if this one is larger than the selected one |
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preferThis = ( aSelectedDimen < aThisDimen ); |
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} |
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else if ( aThisDimen > aReqDimen ) |
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{ |
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// Only interested if the selected one is smaller than requested |
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// or this one is smaller than the selected one |
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preferThis = ( aDrmValid && |
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( aSelectedDimen < aReqDimen || aThisDimen < aSelectedDimen ) ); |
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} |
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else // aThisDimen == aReqDimen |
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{ |
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// The right size, so choose it |
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} |
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|
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return preferThis; |
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} |