/*
* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: ?Description
*
*/
#ifndef __HUIVG10CURVEPATH_H__
#define __HUIVG10CURVEPATH_H__
#include "uiacceltk/HuiCurvePath.h"
#include "HuiVg10RenderPlugin.h"
#include <VG/openvg.h>
/**
* Curve path that can be drawn using OpenVG 1.0.
*/
NONSHARABLE_CLASS(CHuiVg10CurvePath) : public CHuiCurvePath
{
public:
/* Constructors and destructor. */
/**
* Constructor.
*/
CHuiVg10CurvePath();
/**
* Second-phase constructor.
*/
void ConstructL();
/**
* Destructor.
*/
virtual ~CHuiVg10CurvePath();
/* Methods. */
/**
* Resets the path by removing all segments.
*/
virtual void Reset();
/**
* Recalculate the path's vertices and colors.
*/
void Update(TReal32 aStartPos, TReal32 aEndPos,
TReal32 aAlphaFactor,
MHuiMappingFunction* aAlphaFunction,
MHuiMappingFunction* aWidthFunction) __SOFTFP;
/**
* Draws the path.
*
* @param aOrigin Offset of drawing in pixels
* @param aGc Graphics context to use.
*/
void Draw(const TPoint& aOrigin, CHuiGc* aGc) const;
protected:
/**
* @returns the number of tuples required for
* a given segment.
*/
TInt SegmentTuples(const TSegment& aSegment) const;
/**
* Reserve space for tuples.
*
* @param aTuplecount Number of tuples required.
*/
void SetTupleCountL(TInt aTupleCount);
/**
* Prepare the tuples for a given segment.
*
* @param aSegment Segment to process.
* @param aStart Start position.
* @param aEnd End position.
* @param aIsFinal ETrue if this is the final
* segment of the path.
* @param aAlphaFactor Transparency factor.
* @param aAlphaFunction Function of path alpha.
* @param aWidthFunction Function of path width.
*/
void MakeSegmentTuples(const TSegment& aSegment,
TReal32 aStart, TReal32 aEnd,
TBool aIsFinal,
TReal32 aAlphaFactor,
MHuiMappingFunction* aAlphaFunction,
MHuiMappingFunction* aWidthFunction);
/**
* Add a single tuple to the path.
*
* @param aPoint Tuple coordinates.
* @param aNormal Tuple normal (left side).
* @param aWidth Path width.
* @param aAlpha Path transparency.
*/
void AddTuple(const THuiRealPoint& aPoint,
const THuiRealPoint& aNormal,
TReal32 aWidth, TReal32 aAlpha);
/**
* Reset the current path.
*/
void ResetPath();
/**
* Reset the accumulated tuples.
*/
void ResetTuples();
private:
/** Path that encloses the whole curve */
VGPath iPath;
/** Coordinates for the path */
VGfloat* iPathCoords;
/** Commands for the path */
VGubyte* iPathCommands;
/** Last opacity factor used to render the path */
TReal32 iLastOpacityFactor;
/** Number of vertex tuples along the path (at least 2). */
TUint iMaxTupleCount;
/** Number of vertex tuples used. */
TUint iUsedTupleCount;
};
#endif // __HUIVG10CURVEPATH_H__