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/*
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* Copyright (c) 2002 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: Graphics Extension Library header file
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*
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*/
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#ifndef GFXFLATTENINGPATHITERATOR_H
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#define GFXFLATTENINGPATHITERATOR_H
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#include <e32base.h>
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#include <e32std.h>
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#include "GfxFloatFixPt.h"
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#include "GfxPathIterator.h"
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class TGfxAffineTransform;
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class MGfxShape;
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/**
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* This class provides the methods to smooth a path.
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*
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* @lib Gfx2D.lib
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* @since 1.0
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*/
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class CGfxFlatteningPathIterator : public CGfxPathIterator
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{
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public:
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/**
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* Two-phase constructor.
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*
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* @since 1.0
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* @param aSrc : source of path of flatten
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* @param aAt : transform to apply.
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* @param aFlatness : degree of flattening to apply.
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* @param aLimit : maximum number of points used for flattening.
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* @return
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*/
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static CGfxFlatteningPathIterator* NewL( MGfxShape* aSrc,
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TGfxAffineTransform* aAt,
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TInt32 aLimit );
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/**
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* Destructor
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*
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* @since 1.0
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* @return
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*/
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virtual ~CGfxFlatteningPathIterator();
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/**
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* Set the degree of flattening to apply.
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*
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* @since 1.0
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* @param aFlatness : degree of flattening.
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* @return
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*/
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void SetFlatness( TFloatFixPt& aFlatness );
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/**
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* Set the recursion level.
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*
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* @since 1.0
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* @param aLimit : recursion level.
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* @return
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*/
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void SetRecursionLimit( TInt32 aLimit );
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/**
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* Get the flattening level..
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*
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* @since 1.0
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* @param aLimit : recursion level.
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* @return flattening value.
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*/
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TFloatFixPt Flatness();
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/**
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* Get the recursion level.
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*
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* @since 1.0
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* @return the recursion level.
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*/
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TInt32 RecursionLimit();
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/**
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* Get the points defining the current segment of iteration.
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*
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* @since 1.0
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* @param aCoords : array to store segment points.
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* @return segment type.
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*/
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TGfxSegType CurrentSegment( TFloatFixPt* aCoords );
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/**
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* Determine wether the end has been reached.
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*
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* @since 1.0
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* @return true, if end of iterator reached.
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*/
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TBool IsDone();
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/**
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* Cycle to the next segment of this iterator.
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*
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* @since 1.0
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* @return
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*/
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void NextL();
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/**
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* Create a polygon from iterator. This method is does nothing.
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*
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* @since 1.0
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* @return
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*/
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void PolygonizeL( CGfxEdgeListP* aRenderer, TInt aFlatness );
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private:
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/**
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* Constructor
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*
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* @since 1.0
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* @param aFlatness : degree of flattening to apply.
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* @param aLimit : maximum number of points used for flattening.
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* @return
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*/
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CGfxFlatteningPathIterator( TInt32 aLimit );
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/**
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* Second phase of constrction.
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*
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* @since 1.0
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* @param aSrc : source of path of flatten
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* @param aAt : transform to apply.
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* @return
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*/
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void ConstructL( MGfxShape* aSrc,
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TGfxAffineTransform* aAt );
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/**
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* Create a quadratic sub-curve.
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*
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* @since 1.0
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* @param aCtrlPoints : quadratic control points.
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* @return
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*/
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void CreateSubcurveQuadL( RArray<TFloatFixPt>* aCtrlPoints );
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/**
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* Create a cubic sub-curve.
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*
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* @since 1.0
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* @param aCtrlPoints : cubic control points.
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* @return
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*/
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void CreateSubcurveCubicL( RArray<TFloatFixPt>* aCtrlPoints );
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private:
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RArray<TFloatFixPt>* iCoords;
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TInt32 iIdx;
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CGfxPathIterator* iSrc;
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TFloatFixPt iLastX;
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TFloatFixPt iLastY;
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TGfxSegType iSegType;
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TBool iIsDone;
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TInt32 iLimit;
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TFloatFixPt iFlatness;
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};
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#endif // GFXFLATTENINGPATHITERATOR_H
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