// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).+
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// All rights reserved.+
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// This component and the accompanying materials are made available+
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// under the terms of "Eclipse Public License v1.0"+
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// which accompanies this distribution, and is available+
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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//+
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// Initial Contributors:+
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// Nokia Corporation - initial contribution.+
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//+
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// Contributors:+
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//+
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// Description:+
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// This is the public client API for the GifScaler Library+
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// +
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//+
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+
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#ifndef __GIFSCALER_H__+
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#define __GIFSCALER_H__+
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+
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#include <e32base.h>+
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#include <fbs.h>+
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+
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+
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/**+
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The public API for clients to call the GifScaler scaling and color quantization library.+
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+
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@publishedAll+
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@released+
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*/+
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class CGifScaler : public CBase+
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	{+
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public:+
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	/**+
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	TOptions is an enumeration within the namespace CGifScaler+
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	The enumeration provides a set of supported quantization levels:+
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	(EHighQualityQuantization is the default setting as it provides the+
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	best balance between quality and speed)+
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	*/+
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	enum TOptions+
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		{+
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		/** Provides the lowest quality, but also the fastest.+
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		*/+
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		ELowQualityQuantization,+
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		/** Provides medium quality quantization+
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		*/+
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		EMediumQualityQuantization,+
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		/** Provides high quality quantization+
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		*/+
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		EHighQualityQuantization,+
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		/** Provides the highest quality quantization, but is also the slowest.+
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		*/+
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		EMaximumQualityQuantization+
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		};+
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+
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public:+
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	IMPORT_C static CGifScaler* NewL(CFbsBitmap& aSource, TOptions aOptions = EHighQualityQuantization);+
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	IMPORT_C static CGifScaler* NewL(CFbsBitmap& aSource, CFbsBitmap& aSourceMask, TOptions aOptions = EHighQualityQuantization);+
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	IMPORT_C ~CGifScaler();+
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+
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	// Scale source and mask -> 8bpp destination. (One of the palette indices is transparent, if a mask is supplied)+
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	IMPORT_C void Scale(TRequestStatus* aStatus, CFbsBitmap& aDestination, CPalette& aPalette, TBool aMaintainAspectRatio = ETrue);+
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+
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	// Scale source and mask -> 8bpp destination. (As above, except that the transparency threshold must be specified)+
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	IMPORT_C void ThresholdScale(TRequestStatus* aStatus, CFbsBitmap& aDestination, CPalette& aPalette, TUint8 aTransparencyThreshold, TBool aMaintainAspectRatio = ETrue);+
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+
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	// Cancel scaling.+
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	IMPORT_C void Cancel();+
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+
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private:+
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	CGifScaler();+
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	void ConstructL(CFbsBitmap& aSource, CFbsBitmap* aSourceMask, TOptions aOptions);+
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+
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private:+
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	class CBody;+
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	CBody* iBody;+
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	};+
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+
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#endif // __GIFSCALER_H__+
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