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// Copyright (c) 2004-2009 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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//
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#ifndef __BITDRAWSCALING_H__
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#define __BITDRAWSCALING_H__
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/**
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MScalingSettings interface manages X-axis and Y-axis scaling factors of CFbsDrawDevice interface.
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The interface could be retrieved calling CFbsDrawDevice::GetInterface() with
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KScalingSettingsInterfaceID as an argument.
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If the draw device does not have support for scaling, MScalingSettings cannot be retrieved.
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MScalingSettings interface lifetime is the same as the lifetime of CFbsDrawDevice
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interface, which creates it.
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Do not try to delete MScalingSettings interface pointer!
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MScalingSettings interface offers following methods:
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Get(), Set(), IsScalingOff().
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@see CFbsDrawDevice
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@internalTechnology
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*/
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class MScalingSettings
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{
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public:
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/**
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Sets scaling factor by which the drawing device should scale the drawing images.
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If you want to un-scale the device, call Set() with factorX = 1,
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factorY = 1, divisorX = 1, divisorY = 1.
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@param aFactorX Scaling factor for the X-axis of the screen device.
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@param aFactorY Scaling factor for the y-axis of the screen device.
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@param aDivisorX Not used. Should be set to 1.
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@param aDivisorY Not used. Should be set to 1.
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@return KErrNone success.
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@internalTechnology
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*/
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virtual TInt Set(TInt aFactorX, TInt aFactorY, TInt aDivisorX, TInt aDivisorY) = 0;
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/**
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Retrieves X-axis and Y-axis scaling factors.
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@param aFactorX Upon return contains X-axis scaling factor.
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@param aFactorY Upon return contains Y-axis scaling factor.
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@param aDivisorX Upon return contains the decimal fraction of X-axis scaling factor.
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@param aDivisorY Upon return contains the decimal fraction of Y-axis scaling factor.
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@internalTechnology
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*/
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virtual void Get(TInt& aFactorX, TInt& aFactorY, TInt& aDivisorX, TInt& aDivisorY) = 0;
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/**
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Notifies the caller whether the drawing device is scaled or not.
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@return ETrue Drawing device is not scaled, EFalse - it is scaled.
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@internalTechnology
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*/
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virtual TBool IsScalingOff() = 0;
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};
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#endif//__BITDRAWSCALING_H__
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