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// Copyright (c) 2007-2009 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:
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//
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/**
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@file
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@internalComponent
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*/
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#ifndef SGIMAGECOLLECTIONIMPL_H
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#define SGIMAGECOLLECTIONIMPL_H
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#include "sgimagecollectionadapter.h"
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#include "sgdriverimpl.h"
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/**
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@internalComponent
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An adapter object representing an image collection. Image collections are always
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stored as surfaces. All the images in a collection have the same metadata, which
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is stored at the beginning of the underlying memory chunk.
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If several image collections share a single memory chunk then the metadata is stored
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in an array with as many elements as image collections, while the pixel data of
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each image in any of the collections shares the surface buffer with the corresponding
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images in the other collections.
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*/
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class XSgImageCollectionImpl: public XSgBase, public MSgImageCollectionAdapter
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{
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public:
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static TInt New(XSgImageCollectionImpl*& aPtr, XSgDriverImpl& aDriverImpl,
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const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
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TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
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TInt aMetaDataIndex = 0, const XSgImageCollectionImpl* aCollection = NULL);
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~XSgImageCollectionImpl();
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// From MSgResourceAdapter
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void Close();
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// From MSgImageCollectionAdapter
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const TSurfaceId& SurfaceId() const;
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TInt GetInfo(TSgImageInfo& aInfo) const;
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TInt Count() const;
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TInt OpenImage(TInt aIndex, MSgDrawableAdapter*& aResult);
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private:
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inline XSgImageCollectionImpl(XSgDriverImpl& aDriverImpl);
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TInt Construct(const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
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TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
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TInt aMetaDataIndex, const XSgImageCollectionImpl* aCollection);
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private:
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/** The surface identifier of the image collection. */
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TSurfaceId iSurfaceId;
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/** The number of images in the collection. */
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TInt iCount;
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/** Handle to the underlying memory chunk. */
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RChunk iDataChunk;
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/** Index into the metadata array. */
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TInt iMetaDataIndex;
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};
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#include "sgimagecollectionimpl.inl"
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#endif // SGIMAGECOLLECTIONIMPL_H
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