sl@0: // Copyright (c) 2006-2009 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: #ifndef __LOOKUPTABLE_H__
sl@0: #define __LOOKUPTABLE_H__
sl@0: 
sl@0: #include <e32std.h>
sl@0: 
sl@0: /**
sl@0: @internalTechnology
sl@0: */
sl@0:  IMPORT_C const TUint16* Convert16to32bppLow();
sl@0:  IMPORT_C const TUint32* Convert16to32bppHigh();
sl@0: 
sl@0: /**
sl@0: Returns the pointer to the table of 16-bit normalisation table.
sl@0: The table is currently used for performing un-multiplying Premultiplied Alpha color channels.
sl@0: Use: Let x be c * a/255, and y = c, then y = (x/a)*255, where a is in 0-255 range.
sl@0: 		To use this table, use y = (x * Table[a])>>8. i.e, the inaccurate division is converted 
sl@0: 		to more accurate multiplication and shift.
sl@0: 		
sl@0: @return pointer to the normalisation table.
sl@0: @internalTechnology
sl@0: 
sl@0: */
sl@0: IMPORT_C const TUint16* PtrTo16BitNormalisationTable();
sl@0: 
sl@0: 
sl@0: 
sl@0: #endif