1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 /**

    17  @file

    18  @internalComponent

    19 */

    20 

    21 #ifndef SGIMAGECOLLECTIONIMPL_H

    22 #define SGIMAGECOLLECTIONIMPL_H

    23 

    24 #include "sgimagecollectionadapter.h"

    25 #include "sgdriverimpl.h"

    26 

    27 

    28 /**

    29 @internalComponent

    30 

    31 An adapter object representing an image collection. Image collections are always

    32 stored as surfaces. All the images in a collection have the same metadata, which

    33 is stored at the beginning of the underlying memory chunk.

    34 

    35 If several image collections share a single memory chunk then the metadata is stored

    36 in an array with as many elements as image collections, while the pixel data of

    37 each image in any of the collections shares the surface buffer with the corresponding

    38 images in the other collections.

    39 */

    40 class XSgImageCollectionImpl: public XSgBase, public MSgImageCollectionAdapter

    41 	{

    42 public:

    43 	static TInt New(XSgImageCollectionImpl*& aPtr, XSgDriverImpl& aDriverImpl,

    44 	                const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,

    45 	                TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,

    46 	                TInt aMetaDataIndex = 0, const XSgImageCollectionImpl* aCollection = NULL);

    47 	~XSgImageCollectionImpl();

    48 	// From MSgResourceAdapter

    49 	void Close();

    50 	// From MSgImageCollectionAdapter

    51 	const TSurfaceId& SurfaceId() const;

    52 	TInt GetInfo(TSgImageInfo& aInfo) const;

    53 	TInt Count() const;

    54 	TInt OpenImage(TInt aIndex, MSgDrawableAdapter*& aResult);

    55 private:

    56 	inline XSgImageCollectionImpl(XSgDriverImpl& aDriverImpl);

    57 	TInt Construct(const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,

    58 	               TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,

    59 	               TInt aMetaDataIndex, const XSgImageCollectionImpl* aCollection);

    60 private:

    61 	/** The surface identifier of the image collection. */

    62 	TSurfaceId iSurfaceId;

    63 	/** The number of images in the collection. */

    64 	TInt iCount;

    65 	/** Handle to the underlying memory chunk. */

    66 	RChunk iDataChunk;

    67 	/** Index into the metadata array. */

    68 	TInt iMetaDataIndex;

    69 	};

    70 

    71 

    72 #include "sgimagecollectionimpl.inl"

    73 

    74 

    75 #endif // SGIMAGECOLLECTIONIMPL_H