// Copyright (c) 1997-2009 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:

//

#include <bitstd.h>

#include <bitdev.h>

#include "BITPANIC.H"

#include <bitdraw.h>

#include <graphics/fbsrasterizer.h>

#include "bitgcextradata.h"

/**  Draws a straight line between two points.

The function provides a concrete implementation of the pure virtual

function CGraphicsContext::DrawLine(). The function

behaviour is the same as documented in that class. */	

EXPORT_C void CFbsBitGc::DrawLine(const TPoint& aPt1,const TPoint& aPt2)

    {

	CheckDevice();

	TRect lineBoundingRect(aPt1,aPt2);

	lineBoundingRect.Normalize();

	lineBoundingRect.Move(iOrigin);

	lineBoundingRect.Grow((iPenSize.iWidth >> 1) + 1,(iPenSize.iHeight >> 1) + 1);

	if(!lineBoundingRect.Intersects(iUserClipRect))

		{

		iLinePosition = aPt2;// if DrawLine returns due to aPt2 being outside of the clipping rect then subsequent line are drawn from correct point.

		return;

		}

	SetupDevice();

	iDevice->DrawingBegin();

	DoDrawLine(aPt1,aPt2,ETrue);

	iDevice->DrawingEnd();

	}

/** Draws a straight line from the current drawing point to a specified

point.

The function provides a concrete implementation of the pure virtual

function CGraphicsContext::DrawLineTo(). The function

behaviour is the same as documented in that class. */

EXPORT_C void CFbsBitGc::DrawLineTo(const TPoint& aPoint)

	{

	DrawLine(iLinePosition,aPoint);

	}

/** Draws a straight line relative to the current drawing point, using a

vector.

The function provides a concrete implementation of the pure virtual

function CGraphicsContext::DrawLineBy(). The function

behaviour is the same as documented in that class. */	

EXPORT_C void CFbsBitGc::DrawLineBy(const TPoint& aVector)

    {

	DrawLine(iLinePosition,iLinePosition + aVector);

	}

/** Draws a polyline from a set of points specified in a list.

The functions provides a concrete implementation of the pure virtual

functions CGraphicsContext::DrawPolyLine(). The function

behaviour is the same as documented in that class. */

EXPORT_C void CFbsBitGc::DrawPolyLine(const CArrayFix<TPoint>* aPointList)

	{

	if(!aPointList || iPenSize.iWidth < 1 || iPenSize.iHeight < 1)

		return;

	const TInt vertexes = aPointList->Count()-1;

	for (TInt count = 0; count < vertexes; count++)

		DrawLine((*aPointList)[count],(*aPointList)[count + 1]);

	if (iPenStyle == CGraphicsContext::ESolidPen && vertexes >= 0)

		Plot((*aPointList)[vertexes]);

	}

/** Draws a polyline from a set of points specified in an array, but does not draw 

the final point of the last line.

@param aPointList An array containing the points on the polyline. */

EXPORT_C void CFbsBitGc::DrawPolyLineNoEndPoint(const CArrayFix<TPoint>* aPointList)

	{

	if(!aPointList || iPenSize.iWidth < 1 || iPenSize.iHeight < 1)

		return;

	const TInt vertexes = aPointList->Count() - 1;

	for (TInt count = 0; count < vertexes; count++)

		DrawLine((*aPointList)[count],(*aPointList)[count + 1]);

	}

/** Draws a polyline from a set of points specified in a list.

The functions provides a concrete implementation of the pure virtual

functions CGraphicsContext::DrawPolyLine(). The function

behaviour is the same as documented in that class. */

EXPORT_C void CFbsBitGc::DrawPolyLine(const TPoint* aPointList,TInt aNumPoints)

	{

    DrawPolyLineNoEndPoint(aPointList,aNumPoints);

	if (iPenStyle == CGraphicsContext::ESolidPen)

		Plot(aPointList[aNumPoints - 1]);

	}

/** Draws a polyline from a set of points specified in a list, but does not 

draw the final point of the last line.

@param aPointList Pointer to a set of points on the polyline. 

@param aNumPoints Number of points in the list. */

EXPORT_C void CFbsBitGc::DrawPolyLineNoEndPoint(const TPoint* aPointList,TInt aNumPoints)

	{

	if (!aPointList || iPenSize.iWidth < 1 || iPenSize.iHeight < 1)

		return;

	const TInt vertexes = aNumPoints - 1;

	for (TInt count = 0; count < vertexes; count++)

		DrawLine(aPointList[count],aPointList[count + 1]);

	}

/** Draws and fills a polygon defined using a list of points.

The function provides a concrete implementation of the pure virtual

function CGraphicsContext::DrawPolygon(). The function

behaviour is the same as documented in that class. */

EXPORT_C TInt CFbsBitGc::DrawPolygon(const CArrayFix<TPoint>* aPointList,TFillRule aFillRule)

	{

	CheckDevice();

	if (!aPointList)

		return KErrArgument;

	const TInt numpoints = aPointList->Count();

	if (numpoints == 0)

		return KErrNone; // Nothing to do!

	SetupDevice();

	iDevice->DrawingBegin(&iBrushBitmap);

	CFbsRasterizer* brushRasterizer = PrepareRasterizerForExtendedBitmap(iBrushBitmap);

	if (iBrushStyle != ENullBrush)

		{

		TRect pointrect(0,0,0,0);

		TRect truncrect(0,0,0,0);

		TBool largepolygon = EFalse;

		for (TInt count = 0; count < numpoints; count++)

			{

			pointrect.iTl = (*aPointList)[count] + iOrigin;

			truncrect.iTl = pointrect.iTl;

			iDevice->TruncateRect(truncrect);

			if (pointrect.iTl != truncrect.iTl)

				{

				largepolygon = ETrue;

				break;

				}

			}

		if (largepolygon)

			PolyFillLarge(aPointList,aFillRule);

		else

			PolyFill(aPointList,aFillRule);

		}

	if (iPenStyle != ENullPen)

		if (iPenSize.iWidth > 0 && iPenSize.iHeight > 0)

			PolyOutline(aPointList);

	if (brushRasterizer)

		{

		brushRasterizer->EndBitmap(iBrushBitmap.SerialNumber());

		}

	iDevice->DrawingEnd(&iBrushBitmap);

	return KErrNone;

	}

/** Draws and fills a polygon defined using a list of points.

The function provides a concrete implementation of the pure virtual

function CGraphicsContext::DrawPolygon(). The function

behaviour is the same as documented in that class. */	

EXPORT_C TInt CFbsBitGc::DrawPolygon(const TPoint* aPointList,

									 TInt aNumPoints,

									 CGraphicsContext::TFillRule aFillRule)

    {

	CheckDevice();

	if (!aPointList || aNumPoints < 0)

		return KErrArgument;

	if (aNumPoints == 0)

		return KErrNone; // Nothing to do!

	SetupDevice();

	iDevice->DrawingBegin(&iBrushBitmap);

	CFbsRasterizer* brushRasterizer = PrepareRasterizerForExtendedBitmap(iBrushBitmap);

	if (iBrushStyle != ENullBrush)

		{

		TRect pointrect(0,0,0,0);

		TRect truncrect(0,0,0,0);

		TBool largepolygon = EFalse;

		for (TInt count = 0; count < aNumPoints; count++)

			{

			pointrect.iTl = aPointList[count] + iOrigin;

			truncrect.iTl = pointrect.iTl;

			iDevice->TruncateRect(truncrect);

			if (pointrect.iTl != truncrect.iTl)

				{

				largepolygon = ETrue;

				break;

				}

			}

		if (largepolygon)

			PolyFillLarge(aPointList,aNumPoints,aFillRule);

		else

			PolyFill(aPointList,aNumPoints,aFillRule);

		}

	if (iPenStyle != ENullPen && iPenSize.iWidth > 0 && iPenSize.iHeight > 0)

		PolyOutline(aPointList,aNumPoints);

	if (brushRasterizer)

		{

		brushRasterizer->EndBitmap(iBrushBitmap.SerialNumber());

		}

	iDevice->DrawingEnd(&iBrushBitmap);

	return KErrNone;

	}

void CFbsBitGc::DoDrawLine(TPoint aPt1,TPoint aPt2,TBool aDrawStartPoint)

	{

	iLinePosition = aPt2;

	if (aPt1 == aPt2 || iPenStyle == ENullPen || !iPenSize.iWidth || !iPenSize.iHeight)

		return;

	aPt1 += iOrigin;

	aPt2 += iOrigin;

	TRect temp(aPt1,aPt2);

	temp.Normalize();

	temp.Grow(iPenSize.iWidth,iPenSize.iHeight);

	AddRect(temp);

	if (UserClipRect(temp))

		return;

	CFbsDrawDevice* drawDevice = iDevice->iDrawDevice;

	TRect screenRect;

	drawDevice->GetDrawRect(screenRect);

	screenRect.Grow(iPenSize.iWidth,iPenSize.iHeight);

	const TInt dotParam = iDotParam;

	TPoint plotpt(0,0);

	for (TInt count = 0; count < iDefaultRegionPtr->Count(); count++)

		{

		iDotParam = dotParam;

		iClipRect = (*iDefaultRegionPtr)[count];

		if (!iClipRect.Intersects(temp))

			{

			TLinearDDA line;

			line.Construct(aPt1,aPt2);

			line.JumpToRect(screenRect);

			if (iPenStyle != ESolidPen)

				while (!line.SingleStep(plotpt))

					iDotParam += iDotDirection;

			continue;

			}

		iClipRect.Intersection(temp);

		if ((iPenSize.iWidth > 1 || iPenSize.iHeight > 1) && iPenStyle == ESolidPen) // wide solid line

			DoDrawSolidWideLine(aPt1,aPt2,aDrawStartPoint,screenRect);

		else if (iPenSize.iWidth > 1 || iPenSize.iHeight > 1) // dotted line

			DoDrawDottedWideLine(aPt1,aPt2,aDrawStartPoint,screenRect);

		else if (iPenStyle != ESolidPen) // single pixel dotted line

			{

			TLinearDDA line;

			line.Construct(aPt1,aPt2);

			line.JumpToRect(screenRect);

			iDotParam = dotParam;

			if (!aDrawStartPoint)

				{

				line.SingleStep(plotpt);

				iDotParam += iDotDirection;

				}

			while (!line.SingleStep(plotpt))

				{

				PenDrawClipped(plotpt);

				iDotParam += iDotDirection;

				}

			}

		else if (aPt1.iY == aPt2.iY && 

				 (aPt1.iY >= iClipRect.iTl.iY && aPt1.iY < iClipRect.iBr.iY))

			{ // single pixel solid horizontal line

			TInt start = Min(aPt1.iX,aPt2.iX + 1);

			TInt length = Abs(aPt2.iX - aPt1.iX);

			if (!aDrawStartPoint)

				if (aPt1.iX < aPt2.iX)

					start++;

				else

					length--;

			if (start < iClipRect.iTl.iX)

				{

				length += start - iClipRect.iTl.iX;

				start = iClipRect.iTl.iX;

				}

			if (start + length > iClipRect.iBr.iX)

				length = iClipRect.iBr.iX - start;

			if (length > 0)

				{

				BG_ASSERT_DEBUG(start >= iUserClipRect.iTl.iX,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(aPt1.iY >= iUserClipRect.iTl.iY,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(start + length <= iUserClipRect.iBr.iX,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(aPt1.iY < iUserClipRect.iBr.iY,EBitgdiPanicOutOfBounds);

				drawDevice->WriteRgbMulti(start,aPt1.iY,length,1,iPenColor,iDrawMode);

				}

			}

		else if (aPt1.iX == aPt2.iX && (aPt1.iX >= iClipRect.iTl.iX && aPt1.iX < iClipRect.iBr.iX))

			{ // single pixel solid vertical line

			TInt start = Min(aPt1.iY,aPt2.iY + 1);

			TInt length = Abs(aPt2.iY - aPt1.iY);

			if (!aDrawStartPoint)

				if (aPt1.iY < aPt2.iY)

					start++;

				else

					length--;

			if (start < iClipRect.iTl.iY)

				{

				length += start - iClipRect.iTl.iY;

				start = iClipRect.iTl.iY;

				}

			if (start + length > iClipRect.iBr.iY)

				length = iClipRect.iBr.iY - start;

			if (length > 0)

				{

				BG_ASSERT_DEBUG(aPt1.iX >= iUserClipRect.iTl.iX,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(start >= iUserClipRect.iTl.iY,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(aPt1.iX < iUserClipRect.iBr.iX,EBitgdiPanicOutOfBounds);

				BG_ASSERT_DEBUG(start + length <= iUserClipRect.iBr.iY,EBitgdiPanicOutOfBounds);

				drawDevice->WriteRgbMulti(aPt1.iX,start,1,length,iPenColor,iDrawMode);

				}

			}

		else

			{ // single pixel solid diagonal line

			TLinearDDA line;

			line.Construct(aPt1,aPt2);

			line.JumpToRect(screenRect);

			if (!aDrawStartPoint)

				line.SingleStep(plotpt);

			while (!line.SingleStep(plotpt))

				{

				if (iClipRect.Contains(plotpt))

					{

					BG_ASSERT_DEBUG(plotpt.iX >= iUserClipRect.iTl.iX,EBitgdiPanicOutOfBounds);

					BG_ASSERT_DEBUG(plotpt.iY >= iUserClipRect.iTl.iY,EBitgdiPanicOutOfBounds);

					BG_ASSERT_DEBUG(plotpt.iX < iUserClipRect.iBr.iX,EBitgdiPanicOutOfBounds);

					BG_ASSERT_DEBUG(plotpt.iY < iUserClipRect.iBr.iY,EBitgdiPanicOutOfBounds);

					drawDevice->WriteRgb(plotpt.iX,plotpt.iY,iPenColor,iDrawMode);

					}

				}

			}

		drawDevice->UpdateRegion(iClipRect);

		}

	}

void CFbsBitGc::DoDrawSolidWideLine(const TPoint& aPt1,

									const TPoint& aPt2,

									TBool aDrawStartPoint,

									const TRect& aScreenRect)

	{

	CFbsDrawDevice* drawDevice = iDevice->iDrawDevice;

	TLinearDDA line;

	line.Construct(aPt1,aPt2);

	TPoint plotpt(aPt1);

	line.JumpToRect(aScreenRect);

	if (!aScreenRect.Contains(plotpt) || !aDrawStartPoint)

		line.SingleStep(plotpt);

	TInt* deferred = NULL;

	const TInt doubleheight = iPenSize.iHeight << 1;

	if (iFbsBitGcExtraData->PenArray())

		deferred = new TInt[doubleheight];

	if (!iFbsBitGcExtraData->PenArray() || !deferred)

		{

		while (!line.SingleStep(plotpt))

			PenDrawClipped(plotpt);

		}

	else

		{

		const TBool down = (aPt2.iY >= aPt1.iY);

		for (TInt fillcount = 0; fillcount < doubleheight; )

			{

			deferred[fillcount++] = KMaxTInt;

			deferred[fillcount++] = KMinTInt;

			}

		TInt nextline = 0;

		TInt nexty = plotpt.iY;

		if (down)

			nexty -= ((iPenSize.iHeight - 1) >> 1);

		else

			nexty += (iPenSize.iHeight >> 1);

		TInt lasty = plotpt.iY;

		while (!line.SingleStep(plotpt))

			{

			if (plotpt.iY != lasty)

				{

				if (nexty >= iClipRect.iTl.iY && nexty < iClipRect.iBr.iY)

					{

					TInt left = deferred[nextline];

					TInt right = deferred[nextline + 1];

					if (left < iClipRect.iTl.iX)

						left = iClipRect.iTl.iX;

					if (right >= iClipRect.iBr.iX)

						right = iClipRect.iBr.iX - 1;

					if (left <= right)

						drawDevice->WriteRgbMulti(left,nexty,right - left + 1,1,iPenColor,CGraphicsContext::EDrawModePEN);

					}

				if (down)

					nexty++;

				else

					nexty--;

				lasty = plotpt.iY;

				deferred[nextline++] = KMaxTInt;

				deferred[nextline++] = KMinTInt;

				if (nextline == doubleheight)

					nextline = 0;

				}

			PenDrawDeferred(plotpt,deferred,nextline);

			}

		for (TInt restofline = 0; restofline < doubleheight; restofline += 2,nextline += 2)

			{

			if (nextline == doubleheight)

				nextline = 0;

			if (nexty >= iClipRect.iTl.iY && nexty < iClipRect.iBr.iY)

				{

				TInt left = deferred[nextline];

				TInt right = deferred[nextline+1];

				if (left < iClipRect.iTl.iX)

					left = iClipRect.iTl.iX;

				if (right >= iClipRect.iBr.iX)

					right = iClipRect.iBr.iX-1;

				if (left <= right)

					drawDevice->WriteRgbMulti(left,nexty,right - left + 1,1,iPenColor,CGraphicsContext::EDrawModePEN);

				}

			if (down)

				nexty++;

			else

				nexty--;

			}

		delete[] deferred;

		}

	}

void CFbsBitGc::DoDrawDottedWideLine(const TPoint& aPt1,

									 const TPoint& aPt2,

									 TBool aDrawStartPoint,

									 const TRect& aScreenRect)

	{

	TLinearDDA line;

	line.Construct(aPt1,aPt2);

	TPoint plotpt(aPt1);

	line.JumpToRect(aScreenRect);

	if (!aDrawStartPoint)

		{

		line.SingleStep(plotpt);

		iDotParam += iDotDirection;

		}

	const TInt maxdim = Max(iPenSize.iWidth,iPenSize.iHeight);

	TBool done = EFalse;