sl@0: // Copyright (c) 2000-2009 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: #include <graphicsaccelerator.h>
sl@0: #include <fbs.h>
sl@0: 
sl@0: 
sl@0: /** 
sl@0: Constructor with a software or hardware bitmap.
sl@0: Its type is initialised to EFbsBitmap or EHardwareBitmap accordingly.
sl@0: 
sl@0: @param aBitmap The bitmap which the object will access. 
sl@0: */
sl@0: EXPORT_C TAcceleratedBitmapSpec::TAcceleratedBitmapSpec(CFbsBitmap* aBitmap)
sl@0: 	{
sl@0: 	RHardwareBitmap hwb(aBitmap->HardwareBitmapHandle());
sl@0: 	if(hwb.iHandle)
sl@0: 		{
sl@0: 		::new (this) TAcceleratedBitmapSpec(hwb);
sl@0: 		return;
sl@0: 		}
sl@0: 	iType = EFbsBitmap;
sl@0: 	iHandle = REINTERPRET_CAST(TInt,aBitmap);
sl@0: 
sl@0: 	iLockStatus = EBitmapNeedsLocking;
sl@0: 
sl@0: 	iSpare1 = 0;
sl@0: 	iSpare2 = 0;
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: Constructor with a hardware bitmap. Its type is initialised to EHardwareBitmap. 
sl@0: 	
sl@0: @param aBitmap The bitmap which the object will access. 
sl@0: */
sl@0: EXPORT_C TAcceleratedBitmapSpec::TAcceleratedBitmapSpec(RHardwareBitmap aBitmap)
sl@0: 	{
sl@0: 	iType = EHardwareBitmap;
sl@0: 	iHandle = aBitmap.iHandle;
sl@0: 	iLockStatus = EBitmapIsStatic;
sl@0: 	iSpare1 = 0;
sl@0: 	iSpare2 = 0;
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: Fills a TAcceleratedBitmapInfo structure with data for the bitmap.
sl@0: 
sl@0: This data is only valid for the duration of any processing between a Lock()/Unlock() 
sl@0: pair.
sl@0: 
sl@0: For compressed bitmaps the line pitch has no meaning so it is set to the negation
sl@0: of the compression type as defined by TBitmapfileCompression.
sl@0: 
sl@0: @param aInfo On return, holds the information needed to directly access the 
sl@0: bitmap.
sl@0: @return KErrNone if sucessful, otherwise one of the system error codes, including 
sl@0: KErrUnknown if the object's type is ENoBitmap. 
sl@0: */
sl@0: EXPORT_C TInt TAcceleratedBitmapSpec::GetInfo(TAcceleratedBitmapInfo& aInfo) const
sl@0: 	{
sl@0: 	switch(iType)
sl@0: 		{
sl@0: 		case EFbsBitmap:
sl@0: 			{
sl@0: 			CFbsBitmap* bmp = REINTERPRET_CAST(CFbsBitmap*,iHandle);
sl@0: 			aInfo.iDisplayMode = bmp->DisplayMode();
sl@0: 			aInfo.iAddress = REINTERPRET_CAST(TUint8*,bmp->DataAddress());
sl@0: 			aInfo.iSize = bmp->SizeInPixels();
sl@0: 			SEpocBitmapHeader header = bmp->Header();
sl@0: 			if (header.iCompression != ENoBitmapCompression)
sl@0: 				{
sl@0: 				aInfo.iLinePitch = -header.iCompression;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				aInfo.iLinePitch = bmp->ScanLineLength(aInfo.iSize.iWidth,aInfo.iDisplayMode);
sl@0: 				}
sl@0: 			TUid extendedType = bmp->ExtendedBitmapType();
sl@0: 			if (extendedType != KNullUid)
sl@0: 				{
sl@0: 				aInfo.iPixelShift = extendedType.iUid;
sl@0: 				aInfo.iDataSize = bmp->DataSize();
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				aInfo.iPhysicalAddress = NULL;
sl@0: 				switch(aInfo.iDisplayMode)
sl@0: 					{
sl@0: 					case ENone:
sl@0: 						aInfo.iPixelShift = -1;
sl@0: 						break;
sl@0: 					case EGray2:
sl@0: 						aInfo.iPixelShift = 0;
sl@0: 						break;
sl@0: 					case EGray4:
sl@0: 						aInfo.iPixelShift = 1;
sl@0: 						break;
sl@0: 					case EGray16:
sl@0: 					case EColor16:
sl@0: 						aInfo.iPixelShift = 2;
sl@0: 						break;
sl@0: 					case EGray256:
sl@0: 					case EColor256:
sl@0: 						aInfo.iPixelShift = 3;
sl@0: 						break;
sl@0: 					case EColor4K:
sl@0: 					case EColor64K:
sl@0: 						aInfo.iPixelShift = 4;
sl@0: 						break;
sl@0: 					case EColor16M:
sl@0: 					case ERgb:
sl@0: 					case EColor16MU:
sl@0: 					case EColor16MA: 
sl@0: 					case EColor16MAP: 
sl@0: 						aInfo.iPixelShift = 5;
sl@0: 						break;
sl@0: 					default:
sl@0: 						aInfo.iPixelShift = -1;
sl@0: 						break;
sl@0: 					}
sl@0: 				}
sl@0: 			}
sl@0: 			return KErrNone;
sl@0: 
sl@0: 		case EHardwareBitmap:
sl@0: 			return RHardwareBitmap(iHandle).GetInfo(aInfo);
sl@0: 
sl@0: 		case ENoBitmap:
sl@0: 		default:
sl@0: 			Mem::FillZ(&aInfo,sizeof(aInfo));
sl@0: 			return KErrUnknown;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: /** Locks the bitmap, if required.
sl@0: @param  aCount Reference to a bitmap lock count object for nesting 
sl@0: (only the first instance does the locking). */
sl@0: EXPORT_C void TAcceleratedBitmapSpec::DoLock(TBitmapLockCount& aCount)
sl@0: 	{
sl@0: 	switch(iType)
sl@0: 		{
sl@0: 		case EFbsBitmap:
sl@0: 			if(aCount.Inc()==0)
sl@0: 				REINTERPRET_CAST(CFbsBitmap*,iHandle)->BeginDataAccess();
sl@0: 			break;
sl@0: 
sl@0: 		case ENoBitmap:
sl@0: 		case EHardwareBitmap:
sl@0: 		default:
sl@0: 			// Never needs locking
sl@0: 			return;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: /** Locks the bitmap, if required, setting the accelerated
sl@0: bitmap information address.
sl@0: @param  aCount Reference to a bitmap lock count object for nesting 
sl@0: (only the first instance does the locking).
sl@0: @param  aInfo Information structure to set the address in. */
sl@0: EXPORT_C void TAcceleratedBitmapSpec::DoLock(TBitmapLockCount& aCount,TAcceleratedBitmapInfo& aInfo)
sl@0: 	{
sl@0: 	switch(iType)
sl@0: 		{
sl@0: 		case EFbsBitmap:
sl@0: 			{
sl@0: 			if(aCount.Inc()==0)
sl@0: 				REINTERPRET_CAST(CFbsBitmap*,iHandle)->BeginDataAccess();
sl@0: 
sl@0: 			CFbsBitmap* bmp = REINTERPRET_CAST(CFbsBitmap*,iHandle);
sl@0: 			aInfo.iAddress = REINTERPRET_CAST(TUint8*,bmp->DataAddress());
sl@0: 			}
sl@0: 			break;
sl@0: 
sl@0: 		case ENoBitmap:
sl@0: 		case EHardwareBitmap:
sl@0: 		default:
sl@0: 			// Never needs locking
sl@0: 			return;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: /** Unlocks the bitmap, if required.
sl@0: @param  aCount Reference to a bitmap lock count object for nesting 
sl@0: (only the last instance does the unlocking). */
sl@0: EXPORT_C void TAcceleratedBitmapSpec::DoUnlock(TBitmapLockCount& aCount)
sl@0: 	{
sl@0: 	switch(iType)
sl@0: 		{
sl@0: 		case EFbsBitmap:
sl@0: 			if(aCount.Dec()==0)
sl@0: 				REINTERPRET_CAST(CFbsBitmap*,iHandle)->EndDataAccess();
sl@0: 			break;
sl@0: 
sl@0: 		case ENoBitmap:
sl@0: 		case EHardwareBitmap:
sl@0: 		default:
sl@0: 			// Never needs unlocking
sl@0: 			return;
sl@0: 		}
sl@0: 	}
sl@0: