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// Copyright (c) 2007-2009 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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#include "directgdiadapter.h"
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#include "swdirectgdiellipse.h"
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#include "swdirectgdiengine.h"
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/*
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* TSwDirectGdiEllipse
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*/
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/**
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Initialises the values of the ellipse so that it conforms to a rectangle entered as a parameter.
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@param aRect the rectangle within which the ellipse is drawn
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*/
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void TSwDirectGdiEllipse::Construct(const TRect& aRect)
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{
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TInt width = aRect.Width();
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TInt height = aRect.Height();
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iA = (width-1) >> 1;
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iB = (height-1) >> 1;
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iXAdj = (width+1) & 1;
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iYAdj = (height+1) & 1;
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iOffset = aRect.iTl;
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iX = 0;
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iY = iB;
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iASquared = iA * iA;
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iBSquared = iB * iB;
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iASquBSqu = iASquared * iBSquared;
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iD1 = iBSquared - iASquared * iB + (iASquared>>1);
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if (width<=0 || height<=0)
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{
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iStatus = EComplete;
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}
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else if (width<=2 || height<=2)
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{
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iStatus = ELine;
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}
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else
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{
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iStatus = EInitialised;
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}
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}
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/**
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Does the next stage in producing an ellipse by taking four points (the corners of
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the rectangle the ellipse should fill) as parameters. Updates TSwDirectGdiEllipse status
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accordingly and calls Output(aTopLeft,aTopRight,aBottomLeft,aBottomRight).
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@param aTopLeft Top left corner of rectangle.
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@param aTopRight Top right corner of rectangle.
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@param aBottomLeft Bottom left corner of rectangle.
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@param aBottomRight Bottom right corner of rectangle.
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@return TBool ETrue if step completed successfully.
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*/
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TBool TSwDirectGdiEllipse::SingleStep(TPoint& aTopLeft, TPoint& aTopRight,
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TPoint& aBottomLeft, TPoint& aBottomRight)
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{
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TBool ret = EFalse;
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if (iStatus == EFirstSector)
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{
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if (iD1 < 0)
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{
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iD1 += iBSquared * ((iX<<1)+3);
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}
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else if (iY > 0)
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{
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iD1 += iBSquared * ((iX<<1)+3) + iASquared * (2-(iY<<1));
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iY--;
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}
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iX++;
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ret = Output(aTopLeft,aTopRight,aBottomLeft,aBottomRight);
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if (iStatus == EComplete && iX<iA)
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{
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iStatus = EFirstSector;
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return EFalse;
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}
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if (iASquared*iY<=iBSquared*(iX+1) && ret==EFalse)
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{
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iStatus = ESecondSector;
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iD2 =- iASquBSqu + iBSquared * iX * iX + iASquared * (iY-1) * (iY-1);
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}
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return ret;
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}
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if (iStatus == ESecondSector)
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{
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if (iD2 < 0)
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{
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iD2 += iBSquared * ((iX<<1)+2) + iASquared * (3-(iY<<1));
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iX++;
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}
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else
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{
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iD2 += iASquared * (3-(iY<<1));
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}
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iY--;
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return Output(aTopLeft, aTopRight, aBottomLeft, aBottomRight);
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}
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if (iStatus == ELine)
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{
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ret = Output(aTopLeft, aTopRight, aBottomLeft, aBottomRight);
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if (iA == 0)
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{
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iY--;
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}
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else
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{
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iX++;
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if (iX > iA+iXAdj)
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{
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ret = ETrue;
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}
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else
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{
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iStatus = ELine;
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ret = EFalse;
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}
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}
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return ret;
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}
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if (iStatus == EInitialised)
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{
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iStatus = EFirstSector;
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return Output(aTopLeft, aTopRight, aBottomLeft, aBottomRight);
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}
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Output(aTopLeft, aTopRight, aBottomLeft, aBottomRight);
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return ETrue;
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}
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/**
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Sets the absolute points that define the ellipse as calculated using its iOffset
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from the origin and using the half width and half height of the rectangle iA and iB.
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@param aTopLeft The absolute (x,y) position for the top left point.
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@param aTopRight The absolute (x,y) position for the top right point.
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@param aBottomLeft The absolute (x,y) position for the bottom left point.
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@param aBottomRight The absolute (x,y) position for the bottom right point.
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@return ETrue if a valid rectangle is produced, else EFalse. Also sets
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iStatus to EComplete.
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*/
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TBool TSwDirectGdiEllipse::Output(TPoint& aTopLeft, TPoint& aTopRight,
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TPoint& aBottomLeft, TPoint& aBottomRight)
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{
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TInt lx = iA-iX+iOffset.iX;
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TInt ty = iB-iY+iOffset.iY;
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TInt rx = iA+iX+iXAdj+iOffset.iX;
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TInt by = iB+iY+iYAdj+iOffset.iY;
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aTopLeft.SetXY(lx,ty);
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aTopRight.SetXY(rx,ty);
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aBottomLeft.SetXY(lx,by);
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aBottomRight.SetXY(rx,by);
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if (iY <= 0)
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{
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iStatus = EComplete;
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if (iYAdj==0 || ty>by)
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return ETrue;
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}
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return EFalse;
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}
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/**
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By analysing the current state of the ellipse the process is taken to the next appropriate step.
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If iStatus = EInitialised only one step will be taken, if the ellipse is already semi constructed then
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it will be taken to completion. Takes in four point parameters that define the rectangle in order to pass to
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SingleStep(aTopLeft,aTopRight,aBottomLeft,aBottomRight).
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@param aTopLeft Top-left corner of rectangle.
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@param aTopRight Top-right corner of rectangle.
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@param aBottomLeft Bottom-left corner of rectangle.
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@param aBottomRight Bottom-right corner of rectangle.
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@return ETrue if a valid rectangle is produced, else EFalse.
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*/
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TBool TSwDirectGdiEllipse::NextStep(TPoint& aTopLeft, TPoint& aTopRight,
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TPoint& aBottomLeft, TPoint& aBottomRight)
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{
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if(iStatus == EInitialised)
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{
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return(SingleStep(aTopLeft,aTopRight,aBottomLeft,aBottomRight));
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}
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TInt prevlev = iY;
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TBool ret;
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do
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{
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ret = SingleStep(aTopLeft,aTopRight,aBottomLeft,aBottomRight);
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}
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while (prevlev==iY && ret==EFalse);
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return ret;
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}
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/**
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Constructs an ellipse from the rectangle that has been added. Assesses the position of
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the points and the places where they intersect the ellipse.
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@param aRect The rectangle within which the ellipse is drawn.
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@param aPoint A point to compare with the ellipse to determine if intersection occurs.
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@return TPoint The point is set to the corner which the intersection is nearest to.
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*/
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TPoint TSwDirectGdiEllipse::Intersection(const TRect& aRect, const TPoint& aPoint)
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{
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Construct(aRect); //constructs the rect (an elipse object)
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TPoint centre = aRect.Center(); //centre of ellipse
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TPoint ptcpy(aPoint);
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ptcpy -= iOffset; //ptcpy = aPoint - iOffset - TPoint(iA,iB) //radius from centre of ellipse
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ptcpy -= TPoint(iA,iB);
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TPoint pt[4], opt[4];
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TInt mpt[4], ompt[4];
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TInt count = 0;
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for( ; count < 4; count++)
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{
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ompt[count]=KMaxTInt; //fills ompt 1->4 with KMaxTInt
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}
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while (SingleStep(pt[0], pt[1], pt[2], pt[3]) == EFalse) //creates a complete ellipse with pts as rect
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{
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for (count = 0; count < 4; count++)
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{
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mpt[count] = Abs((pt[count].iY-iOffset.iY-iB)*(ptcpy.iX)-(ptcpy.iY)*(pt[count].iX-iOffset.iX-iA));
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if (mpt[count] < ompt[count]) //use the larger number set.
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{
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ompt[count] = mpt[count];
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opt[count] = pt[count];
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}
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}
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}
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if (pt[0].iY == pt[2].iY) //if it is horizontal
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{
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for (count = 0; count < 4; count++)
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{
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mpt[count] = Abs((pt[count].iY-iOffset.iY-iB)*(ptcpy.iX)-(ptcpy.iY)*(pt[count].iX-iOffset.iX-iA));
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if (mpt[count] < ompt[count]) //use the larger number set.
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{
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ompt[count] = mpt[count];
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opt[count] = pt[count];
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}
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}
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}
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if (ptcpy.iX<0 && ptcpy.iY<0) //if point is further left and higher than centre of rect
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{
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return opt[0];
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}
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if (ptcpy.iY < 0) //if point is higher than centre of rect
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{
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return opt[1];
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}
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if (ptcpy.iX < 0) //if point is further left than centre of rect
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{
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return opt[2];
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}
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if (aPoint.iX<centre.iX && aPoint.iY<centre.iY) //if point is further left and higher than centre of rect
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{
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return opt[0];
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}
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if (aPoint.iY < centre.iY) //if point is higher than centre of rect
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{
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return opt[1];
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}
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if (aPoint.iX < centre.iX) //if point is further left than centre of rect
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{
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return opt[2];
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}
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return(opt[3]); //else
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}
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//
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// Ellipse drawing
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//
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/**
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@see MDirectGdiEngine::DrawEllipse()
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*/
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void CSwDirectGdiEngine::DrawEllipse(const TRect& aRect)
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{
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TRect rcpy(aRect);
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rcpy.Move(iOrigin);
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TruncateRect(rcpy);
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iBrushBitmap.BeginDataAccess();
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288 |
if(iBrushStyle!=DirectGdi::ENullBrush)
|
|
sl@0
|
289 |
EllipseFill(rcpy);
|
|
sl@0
|
290 |
|
|
sl@0
|
291 |
if(iPenStyle!=DirectGdi::ENullPen)
|
|
sl@0
|
292 |
{
|
|
sl@0
|
293 |
if(iPenSize.iWidth>1 && iPenSize.iHeight>1)
|
|
sl@0
|
294 |
{
|
|
sl@0
|
295 |
EllipseOutlineWide(rcpy);
|
|
sl@0
|
296 |
}
|
|
sl@0
|
297 |
else if(iPenSize.iWidth==1 || iPenSize.iHeight==1)
|
|
sl@0
|
298 |
{
|
|
sl@0
|
299 |
EllipseOutline(rcpy);
|
|
sl@0
|
300 |
}
|
|
sl@0
|
301 |
}
|
|
sl@0
|
302 |
iBrushBitmap.EndDataAccess(ETrue);
|
|
sl@0
|
303 |
}
|
|
sl@0
|
304 |
|
|
sl@0
|
305 |
/**
|
|
sl@0
|
306 |
Draws an ellipse inside the given rectangle. Current pen settings apply.
|
|
sl@0
|
307 |
@param aRect The rectangle in which to draw the ellipse.
|
|
sl@0
|
308 |
*/
|
|
sl@0
|
309 |
void CSwDirectGdiEngine::EllipseOutline(const TRect& aRect)
|
|
sl@0
|
310 |
{
|
|
sl@0
|
311 |
TPoint tl,tr,bl,br;
|
|
sl@0
|
312 |
#if defined(_DEBUG)
|
|
sl@0
|
313 |
TRect deviceDestRect;
|
|
sl@0
|
314 |
iDrawDevice->GetDrawRect(deviceDestRect);
|
|
sl@0
|
315 |
#endif
|
|
sl@0
|
316 |
TRect clipRect(0,0,0,0);
|
|
sl@0
|
317 |
const CGraphicsContext::TDrawMode drawMode = GcDrawMode(iDrawMode);
|
|
sl@0
|
318 |
for(TInt count=0;count<iDefaultRegionPtr->Count();count++)
|
|
sl@0
|
319 |
{
|
|
sl@0
|
320 |
clipRect=(*iDefaultRegionPtr)[count];
|
|
sl@0
|
321 |
if(!clipRect.Intersects(aRect))
|
|
sl@0
|
322 |
continue;
|
|
sl@0
|
323 |
clipRect.Intersection(aRect);
|
|
sl@0
|
324 |
GRAPHICS_ASSERT_DEBUG(clipRect.iTl.iX >= deviceDestRect.iTl.iX, EDirectGdiPanicOutOfBounds);
|
|
sl@0
|
325 |
GRAPHICS_ASSERT_DEBUG(clipRect.iTl.iY >= deviceDestRect.iTl.iY, EDirectGdiPanicOutOfBounds);
|
|
sl@0
|
326 |
GRAPHICS_ASSERT_DEBUG(clipRect.iBr.iX <= deviceDestRect.iBr.iX, EDirectGdiPanicOutOfBounds);
|
|
sl@0
|
327 |
GRAPHICS_ASSERT_DEBUG(clipRect.iBr.iY <= deviceDestRect.iBr.iY, EDirectGdiPanicOutOfBounds);
|
|
sl@0
|
328 |
TSwDirectGdiEllipse ellipse;
|
|
sl@0
|
329 |
ellipse.Construct(aRect);
|
|
sl@0
|
330 |
TInt pattern=0;
|
|
sl@0
|
331 |
while(!ellipse.SingleStep(tl,tr,bl,br))
|
|
sl@0
|
332 |
{
|
|
sl@0
|
333 |
if(iPenStyle==DirectGdi::ESolidPen || (iDotMask&(1<<(pattern%iDotLength))))
|
|
sl@0
|
334 |
{
|
|
sl@0
|
335 |
if(tl.iY>=clipRect.iTl.iY && tl.iY<clipRect.iBr.iY)
|
|
sl@0
|
336 |
{
|
|
sl@0
|
337 |
if(tl.iX>=clipRect.iTl.iX && tl.iX<clipRect.iBr.iX)
|
|
sl@0
|
338 |
iDrawDevice->WriteRgb(tl.iX,tl.iY,iPenColor,drawMode);
|
|
sl@0
|
339 |
if(tr.iX>=clipRect.iTl.iX && tr.iX<clipRect.iBr.iX && tl.iX!=tr.iX)
|
|
sl@0
|
340 |
iDrawDevice->WriteRgb(tr.iX,tr.iY,iPenColor,drawMode);
|
|
sl@0
|
341 |
}
|
|
sl@0
|
342 |
if(bl.iY>=clipRect.iTl.iY && bl.iY<clipRect.iBr.iY)
|
|
sl@0
|
343 |
{
|
|
sl@0
|
344 |
if(bl.iX>=clipRect.iTl.iX && bl.iX<clipRect.iBr.iX)
|
|
sl@0
|
345 |
iDrawDevice->WriteRgb(bl.iX,bl.iY,iPenColor,drawMode);
|
|
sl@0
|
346 |
if(br.iX>=clipRect.iTl.iX && br.iX<clipRect.iBr.iX && bl.iX!=br.iX)
|
|
sl@0
|
347 |
iDrawDevice->WriteRgb(br.iX,br.iY,iPenColor,drawMode);
|
|
sl@0
|
348 |
}
|
|
sl@0
|
349 |
}
|
|
sl@0
|
350 |
pattern++;
|
|
sl@0
|
351 |
}
|
|
sl@0
|
352 |
if(tl.iY==bl.iY && tl.iY>=clipRect.iTl.iY && tl.iY<clipRect.iBr.iY)
|
|
sl@0
|
353 |
{
|
|
sl@0
|
354 |
if(tl.iX>=clipRect.iTl.iX && tl.iX<clipRect.iBr.iX)
|
|
sl@0
|
355 |
iDrawDevice->WriteRgb(tl.iX,tl.iY,iPenColor,drawMode);
|
|
sl@0
|
356 |
if(tr.iX>=clipRect.iTl.iX && tr.iX<clipRect.iBr.iX && tl.iX!=tr.iX)
|
|
sl@0
|
357 |
iDrawDevice->WriteRgb(tr.iX,tr.iY,iPenColor,drawMode);
|
|
sl@0
|
358 |
}
|
|
sl@0
|
359 |
iDrawDevice->UpdateRegion(clipRect);
|
|
sl@0
|
360 |
}
|
|
sl@0
|
361 |
}
|
|
sl@0
|
362 |
|
|
sl@0
|
363 |
/**
|
|
sl@0
|
364 |
Draws an ellipse inside the given rectangle. Current pen settings apply.
|
|
sl@0
|
365 |
@param aRect The rectangle in which to draw the ellipse.
|
|
sl@0
|
366 |
*/
|
|
sl@0
|
367 |
void CSwDirectGdiEngine::EllipseOutlineWide(const TRect& aRect)
|
|
sl@0
|
368 |
{
|
|
sl@0
|
369 |
TRect rcpy(aRect);
|
|
sl@0
|
370 |
TPoint tl,tr,bl,br;
|
|
sl@0
|
371 |
TInt halfpenwidth=(iPenSize.iWidth+1)>>1;
|
|
sl@0
|
372 |
TInt halfpenheight=(iPenSize.iHeight+1)>>1;
|
|
sl@0
|
373 |
rcpy.Grow(halfpenwidth, halfpenheight);
|
|
sl@0
|
374 |
TInt dp=iDotParam;
|
|
sl@0
|
375 |
TRect clipRect(0,0,0,0);
|
|
sl@0
|
376 |
for(TInt count=0;count<iDefaultRegionPtr->Count();count++)
|
|
sl@0
|
377 |
{
|
|
sl@0
|
378 |
clipRect=(*iDefaultRegionPtr)[count];
|
|
sl@0
|
379 |
if(!clipRect.Intersects(rcpy))
|
|
sl@0
|
380 |
continue;
|
|
sl@0
|
381 |
clipRect.Intersection(rcpy);
|
|
sl@0
|
382 |
TSwDirectGdiEllipse ellipse;
|
|
sl@0
|
383 |
ellipse.Construct(aRect);
|
|
sl@0
|
384 |
iDotParam=Max(iPenSize.iWidth>>1,iPenSize.iHeight>>1);
|
|
sl@0
|
385 |
while(!ellipse.SingleStep(tl,tr,bl,br))
|
|
sl@0
|
386 |
{
|
|
sl@0
|
387 |
PenDrawClipped(tl, clipRect);
|
|
sl@0
|
388 |
PenDrawClipped(tr, clipRect);
|
|
sl@0
|
389 |
PenDrawClipped(bl, clipRect);
|
|
sl@0
|
390 |
PenDrawClipped(br, clipRect);
|
|
sl@0
|
391 |
iDotParam+=iDotDirection;
|
|
sl@0
|
392 |
}
|
|
sl@0
|
393 |
if(tl.iY==bl.iY)
|
|
sl@0
|
394 |
{
|
|
sl@0
|
395 |
PenDrawClipped(tl, clipRect);
|
|
sl@0
|
396 |
PenDrawClipped(tr, clipRect);
|
|
sl@0
|
397 |
}
|
|
sl@0
|
398 |
iDrawDevice->UpdateRegion(clipRect);
|
|
sl@0
|
399 |
}
|
|
sl@0
|
400 |
iDotParam=dp;
|
|
sl@0
|
401 |
}
|
|
sl@0
|
402 |
|
|
sl@0
|
403 |
/**
|
|
sl@0
|
404 |
Fills an ellipse inside the given rectangle. Current brush settings apply.
|
|
sl@0
|
405 |
@param aRect The rectangle in which to draw the ellipse.
|
|
sl@0
|
406 |
*/
|
|
sl@0
|
407 |
void CSwDirectGdiEngine::EllipseFill(const TRect& aRect)
|
|
sl@0
|
408 |
{
|
|
sl@0
|
409 |
TRect rcpy(aRect);
|
|
sl@0
|
410 |
if(iPenSize.iWidth==0 || iPenSize.iHeight==0)
|
|
sl@0
|
411 |
{
|
|
sl@0
|
412 |
rcpy.Grow(1,1);
|
|
sl@0
|
413 |
}
|
|
sl@0
|
414 |
TPoint tl,tr,bl,br;
|
|
sl@0
|
415 |
TRect clipRect(0,0,0,0);
|
|
sl@0
|
416 |
for(TInt count=0;count<iDefaultRegionPtr->Count();count++)
|
|
sl@0
|
417 |
{
|
|
sl@0
|
418 |
clipRect=(*iDefaultRegionPtr)[count];
|
|
sl@0
|
419 |
if(!clipRect.Intersects(rcpy))
|
|
sl@0
|
420 |
continue;
|
|
sl@0
|
421 |
clipRect.Intersection(rcpy);
|
|
sl@0
|
422 |
TSwDirectGdiEllipse ellipse;
|
|
sl@0
|
423 |
ellipse.Construct(rcpy);
|
|
sl@0
|
424 |
while(!ellipse.NextStep(tl,tr,bl,br))
|
|
sl@0
|
425 |
{
|
|
sl@0
|
426 |
tl.iX++;
|
|
sl@0
|
427 |
tr.iX--;
|
|
sl@0
|
428 |
bl.iX++;
|
|
sl@0
|
429 |
br.iX--;
|
|
sl@0
|
430 |
ClipFillLine(tl,tr, clipRect);
|
|
sl@0
|
431 |
ClipFillLine(bl,br, clipRect);
|
|
sl@0
|
432 |
}
|
|
sl@0
|
433 |
if(tl.iY==bl.iY)
|
|
sl@0
|
434 |
{
|
|
sl@0
|
435 |
tl.iX++;
|
|
sl@0
|
436 |
tr.iX--;
|
|
sl@0
|
437 |
ClipFillLine(tl,tr, clipRect);
|
|
sl@0
|
438 |
}
|
|
sl@0
|
439 |
iDrawDevice->UpdateRegion(clipRect);
|
|
sl@0
|
440 |
}
|
|
sl@0
|
441 |
}
|