--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsresourceservices/graphicsresourceadaptation/src/sgimageimpl.cpp	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,744 @@
+// 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:
+//
+
+#include "sgimageimpl.h"
+#include "sgresourceinternal.h"
+
+
+// TSgImageMetaData
+
+TSgImageMetaData::TSgImageMetaData(const TSgImageInfo& aInfo, TArray<TSgPixelFormatTableEntry> aPixelFormatTable, TBool aIsCached)
+	: iCreatorProcess(RProcess().Id()),
+	  iSizeInPixels(aInfo.iSizeInPixels),
+	  iPixelFormat(aInfo.iPixelFormat),
+	  iRequestedUsage(aInfo.iUsage),
+	  iPotentialUsage(0),
+	  iShareable(aInfo.iShareable),
+	  iCpuAccess(aInfo.iCpuAccess),
+	  iScreenId(aInfo.iScreenId),
+	  iIsCached(aIsCached)
+	{
+	TUint32 usageMask = (aInfo.iUsage & KSgUsageAllSources ? KSgUsageAllSources : 0)
+	                    | (aInfo.iUsage & KSgUsageAllTargets ? KSgUsageAllTargets : 0);
+	TInt n = aPixelFormatTable.Count();
+	for (TInt i = 0; i < n; ++i)
+		{
+		const TSgPixelFormatTableEntry& entry = aPixelFormatTable[i];
+		if (entry.IsMatchIgnoringUsage(aInfo))
+			{
+			iPotentialUsage |= entry.iUsage & usageMask;
+			}
+		}
+	}
+
+
+void TSgImageMetaData::GetInfo(TSgImageInfo& aInfo, TBool aGetPotentialUsage) const
+	{
+	aInfo.iSizeInPixels = iSizeInPixels;
+	aInfo.iPixelFormat = iPixelFormat;
+	aInfo.iUsage = aGetPotentialUsage ? iPotentialUsage : iRequestedUsage;
+	aInfo.iShareable = iShareable;
+	aInfo.iCpuAccess = iCpuAccess;
+	aInfo.iScreenId = iScreenId;
+	}
+
+
+// XSgImageImplBase
+
+XSgImageImplBase::XSgImageImplBase(const XSgImageImplBase& aImage, TUint32 aFlags)
+	: XSgBase(aImage.iDriverImpl)
+	{
+	__ASSERT_DEBUG(iDriverImpl.IsMutexHeld(), Panic(ESgPanicMutexNotHeld));
+	iId = aImage.iId;
+	iId.iId[KSgImageIdFlagsIndex] = aFlags;
+	aImage.iState->IncRefCount();
+	iState = aImage.iState;
+	}
+
+
+XSgImageImplBase::~XSgImageImplBase()
+	{
+	__ASSERT_DEBUG(iDriverImpl.IsMutexHeld(), Panic(ESgPanicMutexNotHeld));
+	if (iState && iState->DecRefCount() == 0)
+		{
+		Unmap();
+		iState->Delete();
+		}
+	}
+
+
+TInt XSgImageImplBase::Compare(const TSgDrawableId* aId, const XSgImageImplBase& aImage)
+	{
+	return Mem::Compare(reinterpret_cast<const TUint8*>(aId), sizeof(TSgDrawableId),
+	                    reinterpret_cast<const TUint8*>(&aImage.Id()), sizeof(TSgDrawableId));
+	}
+
+
+TInt XSgImageImplBase::Compare(const XSgImageImplBase& aImage1, const XSgImageImplBase& aImage2)
+	{
+	return Compare(&aImage1.Id(), aImage2);
+	}
+
+
+TInt XSgImageImplBase::CompareIgnoringFlags(const TSgDrawableId* aId, const XSgImageImplBase& aImage)
+	{
+	return Mem::Compare(reinterpret_cast<const TUint8*>(aId), sizeof(TSgDrawableId) - sizeof(TUint32),
+	                    reinterpret_cast<const TUint8*>(&aImage.Id()), sizeof(TSgDrawableId) - sizeof(TUint32));
+	}
+
+
+void XSgImageImplBase::Close()
+	{
+	XSgDriverImpl& driverImpl = iDriverImpl;
+	driverImpl.Wait();
+	if (DecRefCount() == 0)
+		{
+		driverImpl.DeleteImage(this);
+		}
+	driverImpl.Signal();
+	}
+
+
+const TSgDrawableId& XSgImageImplBase::Id() const
+	{
+	return iId;
+	}
+
+
+TUid XSgImageImplBase::DrawableType() const
+	{
+	return KSgImageTypeUid;
+	}
+
+
+TInt XSgImageImplBase::GetInterface(TUid aInterfaceUid, TAny*& aInterfacePtr)
+	{
+	if (aInterfaceUid.iUid == MSgImage_Sw::EInterfaceUid)
+		{
+		aInterfacePtr = static_cast<MSgImage_Sw*>(this);
+		return KErrNone;
+		}
+	return KErrExtensionNotSupported;
+	}
+
+
+TInt XSgImageImplBase::GetInfo(TSgImageInfo& aInfo) const
+	{
+	iState->MetaData().GetInfo(aInfo, iId.iId[KSgImageIdFlagsIndex] & ESgDoNotRestrictUsage);
+	return iState->GetUserAttributes(aInfo.iUserAttributes, aInfo.iUserAttributeCount);
+	}
+
+
+TInt XSgImageImplBase::MapReadOnly(const TAny*& aDataAddress, TInt& aDataStride)
+	{
+	TInt err = iState->BeginDataAccess(ESgCpuAccessReadOnly, ETrue);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	aDataAddress = iState->DataAddress();
+	aDataStride = iState->DataStride();
+	return KErrNone;
+	}
+
+
+TInt XSgImageImplBase::MapWriteOnly(TAny*& aDataAddress, TInt& aDataStride)
+	{
+	TInt err = iState->BeginDataAccess(ESgCpuAccessWriteOnly, ETrue);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	aDataAddress = iState->DataAddress();
+	aDataStride = iState->DataStride();
+	return KErrNone;
+	}
+
+
+TInt XSgImageImplBase::MapReadWrite(TAny*& aDataAddress, TInt& aDataStride)
+	{
+	TInt err = iState->BeginDataAccess(ESgCpuAccessReadWrite, ETrue);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	aDataAddress = iState->DataAddress();
+	aDataStride = iState->DataStride();
+	return KErrNone;
+	}
+
+
+TInt XSgImageImplBase::Unmap()
+	{
+	return iState->EndDataAccess(ETrue);
+	}
+
+
+TAny* XSgImageImplBase::DataAddress() const
+	{
+	return iState->DataAddress();
+	}
+
+
+TInt XSgImageImplBase::DataStride() const
+	{
+	return iState->DataStride();
+	}
+
+
+TInt XSgImageImplBase::BeginDataAccess(TSgCpuAccess aCpuAccess)
+	{
+	return iState->BeginDataAccess(aCpuAccess, EFalse);
+	}
+
+
+TInt XSgImageImplBase::EndDataAccess()
+	{
+	return iState->EndDataAccess(EFalse);
+	}
+
+
+TInt XSgImageImplBase::SetData(const TAny* aDataAddress, TInt aDataStride)
+	{
+	if (aDataAddress)
+		{
+		TInt err = BeginDataAccess(ESgCpuAccessWriteOnly);
+		if (err != KErrNone)
+			{
+			return err;
+			}
+		const TSgImageMetaData& metaData = iState->MetaData();
+		const TAny* src = aDataAddress;
+		TAny* trg = iState->DataAddress();
+		TInt dataStride = iState->DataStride();
+		TInt minDataStride = SgMinDataStride(metaData.iSizeInPixels.iWidth, metaData.iPixelFormat);
+		__ASSERT_DEBUG(minDataStride > 0, Panic(ESgPanicResourceAdapterGeneral));
+		for (TInt y = 0; y < metaData.iSizeInPixels.iHeight; ++y)
+			{
+			Mem::Copy(trg, src, minDataStride);
+			src = PtrAdd(src, aDataStride);
+			trg = PtrAdd(trg, dataStride);
+			}
+		EndDataAccess();
+		}
+	return KErrNone;
+	}
+
+
+TInt XSgImageStateBase::BeginDataAccess(TSgCpuAccess aCpuAccess, TBool aIsUserAccess)
+	{
+	if (aCpuAccess == ESgCpuAccessNone)
+		{
+		return KErrArgument;
+		}
+	const TSgImageMetaData& metaData = MetaData();
+	if (aIsUserAccess && (~metaData.iCpuAccess & aCpuAccess))
+		{
+		return KErrAccessDenied;
+		}
+	if (aIsUserAccess && metaData.iCreatorProcess != RProcess().Id())
+		{
+		return KErrPermissionDenied;
+		}
+	iDriverImpl.Wait();
+	if (iCpuAccess != ESgCpuAccessNone)
+		{
+		iDriverImpl.Signal();
+		return KErrInUse;
+		}
+	iCpuAccess = aCpuAccess;
+	iIsUserAccess = aIsUserAccess;
+	iDriverImpl.Signal();
+	return KErrNone;
+	}
+
+
+TInt XSgImageStateBase::EndDataAccess(TBool aIsUserAccess)
+	{
+	iDriverImpl.Wait();
+	if (iCpuAccess == ESgCpuAccessNone || iIsUserAccess != aIsUserAccess)
+		{
+		iDriverImpl.Signal();
+		return KErrGeneral;
+		}
+	iCpuAccess = ESgCpuAccessNone;
+	iIsUserAccess = EFalse;
+	iDriverImpl.Signal();
+	return KErrNone;
+	}
+
+
+#ifndef SYMBIAN_GRAPHICS_USE_GPU
+
+// XSgImageImpl_SwLocal
+
+TInt XSgImageImpl_SwLocal::New(XSgImageImpl_SwLocal*& aPtr, XSgDriverImpl& aDriverImpl, const TSgDrawableId& aId,
+	                           const TSgImageInfo& aInfo, const TAny* aDataAddress, TInt aDataStride)
+	{
+	aPtr = static_cast<XSgImageImpl_SwLocal*>(aDriverImpl.Alloc(sizeof(XSgImageImpl_SwLocal)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageImpl_SwLocal(aDriverImpl, aId);
+	TInt err = aPtr->Construct(aInfo, aDataAddress, aDataStride);
+	if (err != KErrNone)
+		{
+		aPtr->Delete();
+		aPtr = NULL;
+		}
+	return err;
+	}
+
+
+TInt XSgImageImpl_SwLocal::New(XSgImageImpl_SwLocal*& aPtr, const XSgImageImpl_SwLocal& aImage, TUint32 aFlags)
+	{
+	aPtr = static_cast<XSgImageImpl_SwLocal*>(aImage.iDriverImpl.Alloc(sizeof(XSgImageImpl_SwLocal)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageImpl_SwLocal(aImage, aFlags);
+	return KErrNone;
+	}
+
+
+TInt XSgImageImpl_SwLocal::Construct(const TSgImageInfo& aInfo, const TAny* aDataAddress, TInt aDataStride)
+	{
+	XSgImageState_SwLocal* state;
+	TInt err = XSgImageState_SwLocal::New(state, iDriverImpl, aInfo);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	state->IncRefCount();
+	iState = state;
+	return SetData(aDataAddress, aDataStride);
+	}
+
+
+// XSgImageState_SwLocal
+
+TInt XSgImageState_SwLocal::New(XSgImageState_SwLocal*& aPtr, XSgDriverImpl& aDriverImpl, const TSgImageInfo& aInfo)
+	{
+	TInt dataStride = Align4(SgMinDataStride(aInfo.iSizeInPixels.iWidth, aInfo.iPixelFormat));
+	TInt size = _FOFF(XSgImageState_SwLocal, iUserAttributes) + aInfo.iUserAttributeCount * sizeof(TSgUserAttribute) + dataStride * aInfo.iSizeInPixels.iHeight;
+	aPtr = static_cast<XSgImageState_SwLocal*>(aDriverImpl.Alloc(size));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageState_SwLocal(aDriverImpl, aInfo, dataStride);
+	return KErrNone;
+	}
+
+
+XSgImageState_SwLocal::XSgImageState_SwLocal(XSgDriverImpl& aDriverImpl, const TSgImageInfo& aInfo, TInt aDataStride)
+	: XSgImageStateBase(aDriverImpl, aDataStride), iMetaData(aInfo, aDriverImpl.PixelFormatTable())
+	{
+	iUserAttributeCount = aInfo.iUserAttributeCount;
+	Mem::Copy(iUserAttributes, aInfo.iUserAttributes, aInfo.iUserAttributeCount * sizeof(TSgUserAttribute));
+	}
+
+
+const TSgImageMetaData& XSgImageState_SwLocal::MetaData() const
+	{
+	return iMetaData;
+	}
+
+
+TInt XSgImageState_SwLocal::GetUserAttributes(TSgUserAttribute* aUserAttributes, TInt aUserAttributeCount) const
+	{
+	for (TInt i = 0; i < aUserAttributeCount; ++i)
+		{
+		TBool found = EFalse;
+		for (TInt j = 0; j < iUserAttributeCount; ++j)
+			{
+			if (aUserAttributes[i].iUid == iUserAttributes[j].iUid)
+				{
+				aUserAttributes[i].iValue = iUserAttributes[j].iValue;
+				found = ETrue;
+				break;
+				}
+			}
+		if (!found)
+			{
+			return KErrNotFound;
+			}
+		}
+	return KErrNone;
+	}
+
+
+TAny* XSgImageState_SwLocal::DataAddress() const
+	{
+	//__ASSERT_DEBUG(iCpuAccess != ESgCpuAccessNone, ::Panic(ESgPanicNoCpuAccess));
+	return (TAny*)PtrAdd(iUserAttributes, iUserAttributeCount * sizeof(TSgUserAttribute));
+	}
+
+#endif
+
+
+// XSgImageImpl_SurfaceManager
+
+
+TInt XSgImageImpl_SurfaceManager::New(XSgImageImpl_SurfaceManager*& aPtr, XSgDriverImpl& aDriverImpl,
+                                      const TSgImageInfo& aInfo, TBool aIsCached, const TAny* aDataAddress, TInt aDataStride)
+	{
+	aPtr = static_cast<XSgImageImpl_SurfaceManager*>(aDriverImpl.Alloc(sizeof(XSgImageImpl_SurfaceManager)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageImpl_SurfaceManager(aDriverImpl);
+	TInt err = aPtr->Construct(aInfo, aIsCached, aDataAddress, aDataStride);
+	if (err != KErrNone)
+		{
+		aPtr->Delete();
+		aPtr = NULL;
+		}
+	return err;
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::New(XSgImageImpl_SurfaceManager*& aPtr, XSgDriverImpl& aDriverImpl, const TSgDrawableId& aId)
+	{
+	aPtr = static_cast<XSgImageImpl_SurfaceManager*>(aDriverImpl.Alloc(sizeof(XSgImageImpl_SurfaceManager)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageImpl_SurfaceManager(aDriverImpl, aId);
+	TInt err = aPtr->Construct(aId);
+	if (err != KErrNone)
+		{
+		aPtr->Delete();
+		aPtr = NULL;
+		}
+	return err;
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::New(XSgImageImpl_SurfaceManager*& aPtr, const XSgImageImpl_SurfaceManager& aImage, TUint32 aFlags)
+	{
+	aPtr = static_cast<XSgImageImpl_SurfaceManager*>(aImage.iDriverImpl.Alloc(sizeof(XSgImageImpl_SurfaceManager)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageImpl_SurfaceManager(aImage, aFlags);
+	return KErrNone;
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::Construct(const TSgImageInfo& aInfo, TBool aIsCached, const TAny* aDataAddress, TInt aDataStride)
+	{
+	XSgImageState_SurfaceManager* state;
+	TInt err = XSgImageState_SurfaceManager::New(state, iDriverImpl, aInfo, aIsCached);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	Mem::Copy(&iId, &state->SurfaceId(), sizeof(TSurfaceId));
+	state->IncRefCount();
+	iState = state;
+	return SetData(aDataAddress, aDataStride);
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::Construct(const TSgDrawableId& aId)
+	{
+	XSgImageState_SurfaceManager* state;
+	TInt err = XSgImageState_SurfaceManager::New(state, iDriverImpl, aId);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	state->IncRefCount();
+	iState = state;
+	return KErrNone;
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::GetInterface(TUid aInterfaceUid, TAny*& aInterfacePtr)
+	{
+	if (aInterfaceUid.iUid == MSgImage_Chunk::EInterfaceUid)
+		{
+		aInterfacePtr = static_cast<MSgImage_Chunk*>(this);
+		return KErrNone;
+		}
+	return XSgImageImplBase::GetInterface(aInterfaceUid, aInterfacePtr);
+	}
+
+
+const RChunk& XSgImageImpl_SurfaceManager::DataChunk() const
+	{
+	return static_cast<XSgImageState_SurfaceManager*>(iState)->DataChunk();
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::DataOffset() const
+	{
+	return static_cast<XSgImageState_SurfaceManager*>(iState)->DataOffset();
+	}
+
+
+TInt XSgImageImpl_SurfaceManager::DataStride() const
+	{
+	return iState->DataStride();
+	}
+
+
+// XSgImageState_SurfaceManager
+
+TInt XSgImageState_SurfaceManager::New(XSgImageState_SurfaceManager*& aPtr, XSgDriverImpl& aDriverImpl, const TSgImageInfo& aInfo, TBool aIsCached)
+	{
+	aPtr = static_cast<XSgImageState_SurfaceManager*>(aDriverImpl.Alloc(sizeof(XSgImageState_SurfaceManager)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageState_SurfaceManager(aDriverImpl);
+	TInt err = aPtr->Construct(aInfo, aIsCached);
+	if (err != KErrNone)
+		{
+		aPtr->Delete();
+		aPtr = NULL;
+		}
+	return err;
+	}
+
+
+TInt XSgImageState_SurfaceManager::New(XSgImageState_SurfaceManager*& aPtr, XSgDriverImpl& aDriverImpl, const TSgDrawableId& aId)
+	{
+	aPtr = static_cast<XSgImageState_SurfaceManager*>(aDriverImpl.Alloc(sizeof(XSgImageState_SurfaceManager)));
+	if (!aPtr)
+		{
+		return KErrNoMemory;
+		}
+	new(aPtr) XSgImageState_SurfaceManager(aDriverImpl);
+	TInt err = aPtr->Construct(aId);
+	if (err != KErrNone)
+		{
+		aPtr->Delete();
+		aPtr = NULL;
+		}
+	return err;
+	}
+
+
+TInt XSgImageState_SurfaceManager::Construct(const TSgImageInfo& aInfo, TBool aIsCached)
+	{
+	TInt maxNumberOfHints;
+	TInt err;
+	err=iDriverImpl.GetSurfaceManagerAttrib(RSurfaceManager::EMaxNumberOfHints,maxNumberOfHints);
+	if (err!=KErrNone)
+		{
+		return err;
+		}
+	
+	if (aInfo.iUserAttributeCount > maxNumberOfHints)
+		{
+		return KErrOverflow;
+		}
+	RSurfaceManager::THintPair* hints = new RSurfaceManager::THintPair[aInfo.iUserAttributeCount];
+	if(!hints)
+		{
+		return KErrNoMemory;
+		}
+	RSurfaceManager::TSurfaceCreationAttributesBuf reqs;
+	reqs().iSurfaceHints = hints;
+	reqs().iHintCount = aInfo.iUserAttributeCount;
+	reqs().iSize = aInfo.iSizeInPixels;
+	reqs().iBuffers = 1;
+	reqs().iPixelFormat = aInfo.iPixelFormat;
+	reqs().iStride = SgAlignedDataStride(aInfo.iSizeInPixels.iWidth, aInfo.iPixelFormat);
+	reqs().iOffsetToFirstBuffer = SgOffsetToFirstBuffer(sizeof(TSgImageMetaData));
+	reqs().iAlignment = 4;
+	reqs().iContiguous = EFalse;
+	reqs().iCacheAttrib = aIsCached ? RSurfaceManager::ECached : RSurfaceManager::ENotCached;
+	reqs().iOffsetBetweenBuffers = SgOffsetBetweenBuffers(reqs().iStride, aInfo.iSizeInPixels.iHeight);
+	reqs().iMappable = ETrue;
+	for (TInt i = 0; i < aInfo.iUserAttributeCount; ++i)
+		{
+		reqs().iSurfaceHints[i].iKey = aInfo.iUserAttributes[i].iUid;
+		reqs().iSurfaceHints[i].iValue = aInfo.iUserAttributes[i].iValue;
+		reqs().iSurfaceHints[i].iMutable = EFalse;
+		}
+	TSurfaceId surfaceId;
+	err = iDriverImpl.CreateSurface(reqs, surfaceId);
+	delete[] hints;
+	hints = NULL;
+	reqs().iSurfaceHints = NULL;
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	iSurfaceId = surfaceId;
+	RSurfaceManager::TInfoBuf info;
+	err = iDriverImpl.SurfaceInfo(surfaceId, info);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	err=iDriverImpl.GetBufferOffset(surfaceId,0,iDataOffset);	
+	if (err != KErrNone)
+		{
+		return err;
+		}	
+	iDataStride = info().iStride;
+	RChunk chunk;
+	err = iDriverImpl.MapSurface(surfaceId, chunk);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	iDataChunk = chunk;
+	new(chunk.Base()) TSgImageMetaData(aInfo, iDriverImpl.PixelFormatTable(), aIsCached);
+	return err;
+	}
+
+
+TInt XSgImageState_SurfaceManager::Construct(const TSgDrawableId& aId)
+	{
+	const TSgImageId_SurfaceManager& id_SurfaceManager = reinterpret_cast<const TSgImageId_SurfaceManager&>(aId);
+	if (id_SurfaceManager.iBufferIndex < 0)
+		{
+		return KErrNotFound;
+		}
+	if (id_SurfaceManager.iMetaDataIndex < 0)
+		{
+		return KErrNotFound;
+		}
+	TInt err = iDriverImpl.OpenSurface(id_SurfaceManager.iSurfaceId);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	iSurfaceId = id_SurfaceManager.iSurfaceId;
+	RSurfaceManager::TInfoBuf info;
+	err = iDriverImpl.SurfaceInfo(id_SurfaceManager.iSurfaceId, info);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	iDataStride = info().iStride;
+	if (id_SurfaceManager.iBufferIndex >= info().iBuffers)
+		{
+		return KErrNotFound;
+		}
+	iBufferIndex = id_SurfaceManager.iBufferIndex;
+	TInt offsetToFirstBuffer;
+	err=iDriverImpl.GetBufferOffset(id_SurfaceManager.iSurfaceId,0,offsetToFirstBuffer);
+	if (err != KErrNone)
+		{
+		return err;
+		}	
+	if ((id_SurfaceManager.iMetaDataIndex + 1) * sizeof(TSgImageMetaData) > offsetToFirstBuffer)
+		{
+		return KErrNotFound;
+		}
+	iMetaDataOffset = id_SurfaceManager.iMetaDataIndex * sizeof(TSgImageMetaData);
+	RChunk chunk;
+	err = iDriverImpl.MapSurface(id_SurfaceManager.iSurfaceId, chunk);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	iDataChunk = chunk;
+	err=iDriverImpl.GetBufferOffset(id_SurfaceManager.iSurfaceId,id_SurfaceManager.iBufferIndex,iDataOffset);	
+	return err;
+	}
+
+
+XSgImageState_SurfaceManager::~XSgImageState_SurfaceManager()
+	{
+	if (!iSurfaceId.IsNull())
+		{
+		iDriverImpl.CloseSurface(iSurfaceId);
+		iDataChunk.Close();
+		}
+	}
+
+
+const TSgImageMetaData& XSgImageState_SurfaceManager::MetaData() const
+	{
+	return *reinterpret_cast<TSgImageMetaData*>(iDataChunk.Base() + iMetaDataOffset);
+	}
+
+
+TInt XSgImageState_SurfaceManager::GetUserAttributes(TSgUserAttribute* aUserAttributes, TInt aUserAttributeCount) const
+	{
+	for (TInt i = 0; i < aUserAttributeCount; ++i)
+		{
+		RSurfaceManager::THintPair hint;
+		hint.iKey = aUserAttributes[i].iUid;
+		TInt err = iDriverImpl.GetSurfaceHint(iSurfaceId, hint);
+		if (err != KErrNone)
+			{
+			return err;
+			}
+		aUserAttributes[i].iValue = hint.iValue;
+		}
+	return KErrNone;
+	}
+
+
+TAny* XSgImageState_SurfaceManager::DataAddress() const
+	{
+#ifdef SYMBIAN_GRAPHICS_AUTOFLUSH_CACHE
+	__ASSERT_DEBUG(iCpuAccess != ESgCpuAccessNone, ::Panic(ESgPanicNoCpuAccess));
+#endif
+	return iDataChunk.Base() + iDataOffset;
+	}
+
+
+#ifdef SYMBIAN_GRAPHICS_AUTOFLUSH_CACHE
+
+TInt XSgImageState_SurfaceManager::BeginDataAccess(TSgCpuAccess aCpuAccess, TBool aIsUserAccess)
+	{
+	TInt err = XSgImageStateBase::BeginDataAccess(aCpuAccess, aIsUserAccess);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	if (aCpuAccess != ESgCpuAccessWriteOnly && MetaData().iIsCached && (MetaData().iPotentialUsage & KSgUsageAllTargets))
+		{
+		// Cache::SyncMemoryAfterDmaRead() cannot fail so the following should not fail if the arguments are correct
+		err = iDriverImpl.SynchronizeCache(iSurfaceId, iBufferIndex, RSurfaceManager::ESyncAfterNonCPUWrite);
+		__ASSERT_DEBUG(err == KErrNone, Panic(ESgPanicResourceAdapterGeneral));
+		}
+	return KErrNone;
+	}
+
+
+TInt XSgImageState_SurfaceManager::EndDataAccess(TBool aIsUserAccess)
+	{
+	TSgCpuAccess prevCpuAccess = iCpuAccess;
+	TInt err = XSgImageStateBase::EndDataAccess(aIsUserAccess);
+	if (err != KErrNone)
+		{
+		return err;
+		}
+	if (prevCpuAccess != ESgCpuAccessReadOnly && MetaData().iIsCached)
+		{
+		// Cache::SyncMemoryBeforeDmaWrite() cannot fail so the following should not fail if the arguments are correct
+		err = iDriverImpl.SynchronizeCache(iSurfaceId, iBufferIndex, RSurfaceManager::ESyncBeforeNonCPURead);
+		__ASSERT_DEBUG(err == KErrNone, Panic(ESgPanicResourceAdapterGeneral));
+		}
+	return KErrNone;
+	}
+
+#endif