sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalComponent
sl@0: */
sl@0: 
sl@0: #ifndef SGIMAGECOLLECTIONIMPL_H
sl@0: #define SGIMAGECOLLECTIONIMPL_H
sl@0: 
sl@0: #include "sgimagecollectionadapter.h"
sl@0: #include "sgdriverimpl.h"
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: 
sl@0: An adapter object representing an image collection. Image collections are always
sl@0: stored as surfaces. All the images in a collection have the same metadata, which
sl@0: is stored at the beginning of the underlying memory chunk.
sl@0: 
sl@0: If several image collections share a single memory chunk then the metadata is stored
sl@0: in an array with as many elements as image collections, while the pixel data of
sl@0: each image in any of the collections shares the surface buffer with the corresponding
sl@0: images in the other collections.
sl@0: */
sl@0: class XSgImageCollectionImpl: public XSgBase, public MSgImageCollectionAdapter
sl@0: 	{
sl@0: public:
sl@0: 	static TInt New(XSgImageCollectionImpl*& aPtr, XSgDriverImpl& aDriverImpl,
sl@0: 	                const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
sl@0: 	                TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
sl@0: 	                TInt aMetaDataIndex = 0, const XSgImageCollectionImpl* aCollection = NULL);
sl@0: 	~XSgImageCollectionImpl();
sl@0: 	// From MSgResourceAdapter
sl@0: 	void Close();
sl@0: 	// From MSgImageCollectionAdapter
sl@0: 	const TSurfaceId& SurfaceId() const;
sl@0: 	TInt GetInfo(TSgImageInfo& aInfo) const;
sl@0: 	TInt Count() const;
sl@0: 	TInt OpenImage(TInt aIndex, MSgDrawableAdapter*& aResult);
sl@0: private:
sl@0: 	inline XSgImageCollectionImpl(XSgDriverImpl& aDriverImpl);
sl@0: 	TInt Construct(const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
sl@0: 	               TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
sl@0: 	               TInt aMetaDataIndex, const XSgImageCollectionImpl* aCollection);
sl@0: private:
sl@0: 	/** The surface identifier of the image collection. */
sl@0: 	TSurfaceId iSurfaceId;
sl@0: 	/** The number of images in the collection. */
sl@0: 	TInt iCount;
sl@0: 	/** Handle to the underlying memory chunk. */
sl@0: 	RChunk iDataChunk;
sl@0: 	/** Index into the metadata array. */
sl@0: 	TInt iMetaDataIndex;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: #include "sgimagecollectionimpl.inl"
sl@0: 
sl@0: 
sl@0: #endif // SGIMAGECOLLECTIONIMPL_H