graphicsresourceservices/graphicsresourceadaptation/inc/sgimagecollectionimpl.h
author William Roberts <williamr@symbian.org>
Thu, 03 Jun 2010 17:39:46 +0100
branchNewGraphicsArchitecture
changeset 87 0709f76d91e5
parent 0 5d03bc08d59c
permissions -rw-r--r--
Add MMP files to build libOpenVG_sw.lib which uses LINKAS to redirect to libOpenVG.dll (and the same for libEGL_sw.lib and libOpenVGU_sw.lib). Only the libEGL_sw.lib redirection isn't activated - this can't happen until there is a merged libEGL.dll which supports the OpenWF synchronisation and also implements the graphical support functions. The overall aim is to eliminate the *_sw.dll implementations, at least as a compile-time way of choosing a software-only implementation.The correct way to choose is to put the right set of libraries into a ROM with suitable renaming, and in the emulator to use the "switching DLL" technique to pick the right set. As the Symbian Foundation doesn't have any alternative implementations, we don't need the switching DLLs and we can build directly to the correct name.

// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//

/**
 @file
 @internalComponent
*/

#ifndef SGIMAGECOLLECTIONIMPL_H
#define SGIMAGECOLLECTIONIMPL_H

#include "sgimagecollectionadapter.h"
#include "sgdriverimpl.h"


/**
@internalComponent

An adapter object representing an image collection. Image collections are always
stored as surfaces. All the images in a collection have the same metadata, which
is stored at the beginning of the underlying memory chunk.

If several image collections share a single memory chunk then the metadata is stored
in an array with as many elements as image collections, while the pixel data of
each image in any of the collections shares the surface buffer with the corresponding
images in the other collections.
*/
class XSgImageCollectionImpl: public XSgBase, public MSgImageCollectionAdapter
	{
public:
	static TInt New(XSgImageCollectionImpl*& aPtr, XSgDriverImpl& aDriverImpl,
	                const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
	                TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
	                TInt aMetaDataIndex = 0, const XSgImageCollectionImpl* aCollection = NULL);
	~XSgImageCollectionImpl();
	// From MSgResourceAdapter
	void Close();
	// From MSgImageCollectionAdapter
	const TSurfaceId& SurfaceId() const;
	TInt GetInfo(TSgImageInfo& aInfo) const;
	TInt Count() const;
	TInt OpenImage(TInt aIndex, MSgDrawableAdapter*& aResult);
private:
	inline XSgImageCollectionImpl(XSgDriverImpl& aDriverImpl);
	TInt Construct(const TSgImageInfo& aInfo, TInt aImageCount, TBool aIsCached,
	               TInt aStride, TInt aOffsetToFirstBuffer, TInt aOffsetBetweenBuffers,
	               TInt aMetaDataIndex, const XSgImageCollectionImpl* aCollection);
private:
	/** The surface identifier of the image collection. */
	TSurfaceId iSurfaceId;
	/** The number of images in the collection. */
	TInt iCount;
	/** Handle to the underlying memory chunk. */
	RChunk iDataChunk;
	/** Index into the metadata array. */
	TInt iMetaDataIndex;
	};


#include "sgimagecollectionimpl.inl"


#endif // SGIMAGECOLLECTIONIMPL_H