1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/graphics/graphicsdeviceinterface/directgdiadaptation/swsrc/swdirectgdiellipse.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,84 @@
     1.4 +// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#ifndef SWDIRECTGDIELLIPSE_H_
    1.20 +#define SWDIRECTGDIELLIPSE_H_
    1.21 +
    1.22 +/**
    1.23 +@file
    1.24 +@internalComponent
    1.25 +*/
    1.26 +
    1.27 +#include <e32std.h>
    1.28 +#include <gdi.h>
    1.29 +
    1.30 +/**
    1.31 +A utility class to efficiently draw and fill ellipses
    1.32 +*/
    1.33 +class TSwDirectGdiEllipse
    1.34 +	{
    1.35 +public:
    1.36 +	/**	
    1.37 +	Enumeration for the ellipse production life cycle
    1.38 +	*/
    1.39 +	enum TEllipseStatus
    1.40 +		{
    1.41 +		/**
    1.42 +		Ellipse has been initialised but has no area
    1.43 +		*/
    1.44 +		EInitialised,
    1.45 +		/**
    1.46 +		The ellipse is drawn as two parabolas. These are in two sectors, the top and bottom
    1.47 +		half of the rectangle. The first sector means the top parabola has been produced.
    1.48 +		*/
    1.49 +		EFirstSector,
    1.50 +		/**
    1.51 +		The parabola that occupies the bottom half of the rectangle has been produced. 
    1.52 +		*/
    1.53 +		ESecondSector,
    1.54 +		/**
    1.55 +		The ellipse is complete
    1.56 +		*/
    1.57 +		EComplete,
    1.58 +		/**
    1.59 +		The ellipse has either a height or width of two units or less
    1.60 +		and so takes the appearance of a line
    1.61 +		*/
    1.62 +		ELine
    1.63 +		};
    1.64 +public:
    1.65 +	void Construct(const TRect& aRect);
    1.66 +	TBool SingleStep(TPoint& aTopLeft,TPoint& aTopRight,TPoint& aBottomLeft,TPoint& aBottomRight);
    1.67 +	TBool NextStep(TPoint& aTopLeft,TPoint& aTopRight,TPoint& aBottomLeft,TPoint& aBottomRight);
    1.68 +	TPoint Intersection(const TRect& aRect,const TPoint& aPoint);
    1.69 +protected:
    1.70 +	TBool Output(TPoint& aTopLeft,TPoint& aTopRight,TPoint& aBottomLeft,TPoint& aBottomRight);
    1.71 +protected:
    1.72 +	TEllipseStatus iStatus;
    1.73 +	TInt iA;
    1.74 +	TInt iB;
    1.75 +	TInt64 iASquared;
    1.76 +	TInt64 iBSquared;
    1.77 +	TInt64 iASquBSqu;
    1.78 +	TInt iX;
    1.79 +	TInt iY;
    1.80 +	TInt iXAdj;
    1.81 +	TInt iYAdj;
    1.82 +	TPoint iOffset;
    1.83 +	TInt64 iD1;
    1.84 +	TInt64 iD2;
    1.85 +	};
    1.86 +
    1.87 +#endif /*SWDIRECTGDIELLIPSE_H_*/