sl@0: // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include <e32test.h>
sl@0: #include "TTYPES.H"
sl@0: 
sl@0: TestLine::TestLine(const TPoint& aStart,const TPoint& aFinish, CTTypes* aTest):
sl@0: 	iStart(aStart),
sl@0: 	iFinish(aFinish),
sl@0: 	iTest(aTest)
sl@0: 	{}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::Test
sl@0: 	
sl@0: 	Method to test the functionality within the TLinearDDA class (Linear Digital Differential Analyser)
sl@0: 	Called from the TTypes test script
sl@0: */
sl@0: void TestLine::Test()
sl@0: 	{
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestSingleStep();
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestSingleScanLine();
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestNextStep();
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestJumpToXCoord();
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestJumpToYCoord();
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	TestJumpToRect();
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestSingleStep
sl@0: 	
sl@0: 	Iterate through a line of pixels & confirm the final call to SingleStep rests on the last pixel
sl@0: */
sl@0: void TestLine::TestSingleStep()
sl@0: 	{
sl@0: 	TPoint point;
sl@0: 	while(!iLine.SingleStep(point))
sl@0: 		{
sl@0: 		iTest->TEST((point.iX>=iStart.iX && point.iX<=iFinish.iX) || (point.iX<=iStart.iX && point.iX>=iFinish.iX));
sl@0: 		iTest->TEST((point.iY>=iStart.iY && point.iY<=iFinish.iY) || (point.iY<=iStart.iY && point.iY>=iFinish.iY));
sl@0: 		}
sl@0: 	iTest->TEST(point==iFinish);
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestSingleScanLine
sl@0: 	
sl@0: 	Iterate through each scaline & confirm successive scan lines are concatenated. 
sl@0: 	Confirm the last scanline holds the endppoint that was specified during construction of TLinearDDA
sl@0: */
sl@0: void TestLine::TestSingleScanLine()
sl@0: 	{
sl@0: 	TPoint point1,point2;
sl@0: 	if(!iLine.SingleScanline(point1,point2))
sl@0: 		iTest->TEST(point1==iStart);
sl@0: 	TInt lastycoord=point1.iY;
sl@0: 	while(!iLine.SingleScanline(point1,point2))
sl@0: 		{
sl@0: 		iTest->TEST((point1.iX>=iStart.iX && point1.iX<=iFinish.iX) || (point1.iX<=iStart.iX && point1.iX>=iFinish.iX));
sl@0: 		iTest->TEST((point1.iY>=iStart.iY && point1.iY<=iFinish.iY) || (point1.iY<=iStart.iY && point1.iY>=iFinish.iY));
sl@0: 		iTest->TEST((point2.iX>=iStart.iX && point2.iX<=iFinish.iX) || (point2.iX<=iStart.iX && point2.iX>=iFinish.iX));
sl@0: 		iTest->TEST(point1.iY==point2.iY);
sl@0: 		iTest->TEST(Abs(point1.iY-lastycoord)==1);
sl@0: 		lastycoord=point1.iY;
sl@0: 		}
sl@0: 	iTest->TEST(point2==iFinish);
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestNextStep
sl@0: 	
sl@0: 	Iterate trhough a the start position of each scanline & confirm they are concatenated. 
sl@0: 	Confirm the last scanline holds the endpoint specified during TLinearDDA construction (iFinish)
sl@0: */
sl@0: void TestLine::TestNextStep()
sl@0: 	{
sl@0: 	TPoint point,oldpoint;
sl@0: 	iLine.NextStep(oldpoint);
sl@0: 	iTest->TEST(oldpoint==iStart);
sl@0: 	while(!iLine.NextStep(point))
sl@0: 		{
sl@0: 		iTest->TEST((point.iX>=iStart.iX && point.iX<=iFinish.iX) || (point.iX<=iStart.iX && point.iX>=iFinish.iX));
sl@0: 		iTest->TEST((point.iY>=iStart.iY && point.iY<=iFinish.iY) || (point.iY<=iStart.iY && point.iY>=iFinish.iY));
sl@0: 		iTest->TEST(Abs(point.iY-oldpoint.iY)==1);
sl@0: 		oldpoint=point;
sl@0: 		}
sl@0: 	iTest->TEST(point==iFinish);
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestJumpToRect
sl@0: 	
sl@0: 	Test the JumpToRect functionality, confirming that the start of the clipping rectangle is correctly detected (note we iterate through SingleStep to find the position exactly)
sl@0: */
sl@0: void TestLine::TestJumpToRect()
sl@0: 	{
sl@0: 	TPoint midpoint=iStart+iFinish;
sl@0: 	midpoint.iX>>=1;
sl@0: 	midpoint.iY>>=1;
sl@0: 	TSize rsize(Abs(iStart.iX-iFinish.iX),Abs(iStart.iY-iFinish.iY));
sl@0: 	TRect rect(TPoint(iFinish.iX-(rsize.iWidth>>1),iFinish.iY-(rsize.iHeight>>1)),rsize);
sl@0: 	TRect largerect(TPoint(iFinish.iX-(rsize.iWidth<<1),iFinish.iY-(rsize.iHeight<<1)),TSize(rsize.iWidth<<2,rsize.iHeight<<2));
sl@0: 	TRect offsetrect(rect);
sl@0: 	offsetrect.Move(iStart-iFinish);
sl@0: 	if(iFinish.iX>iStart.iX)
sl@0: 		offsetrect.Move(TPoint(-(rsize.iWidth>>2),0));
sl@0: 	else
sl@0: 		offsetrect.Move(TPoint(rsize.iWidth>>2,0));
sl@0: 	if(iFinish.iY>iStart.iY)
sl@0: 		offsetrect.Move(TPoint(0,(rsize.iHeight>>1)+4));
sl@0: 	else
sl@0: 		offsetrect.Move(TPoint(0,-(rsize.iHeight>>1)-4));
sl@0: 	TPoint intersect,point;
sl@0: 	TLinearDDA line;
sl@0: 	iLine.JumpToRect(rect);
sl@0: 	iLine.SingleStep(intersect);
sl@0: 	line.Construct(iStart,iFinish);
sl@0: 	while(!line.SingleStep(point))
sl@0: 		if(point==intersect)
sl@0: 			break;
sl@0: 	iTest->TEST(point==intersect);
sl@0: 	while(!iLine.SingleStep(intersect))
sl@0: 		{
sl@0: 		line.SingleStep(point);
sl@0: 		iTest->TEST(point==intersect);
sl@0: 		}
sl@0: 	line.SingleStep(point);
sl@0: 	iTest->TEST(point==intersect);
sl@0: 	iTest->TEST(intersect==iFinish);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToRect(largerect);
sl@0: 	iLine.SingleStep(point);
sl@0: 	iTest->TEST(Abs(point.iX-iStart.iX)<=1);
sl@0: 	iTest->TEST(Abs(point.iY-iStart.iY)<=1);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToRect(offsetrect);
sl@0: 	iLine.SingleStep(point);
sl@0: 	if(rsize.iWidth>rsize.iHeight)
sl@0: 		iTest->TEST(point==iStart);
sl@0: 	else
sl@0: 		iTest->TEST(Min(Abs(point.iY-offsetrect.iTl.iY),Abs(point.iY-offsetrect.iBr.iY))==1);
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestJumpToXCoord
sl@0: 	
sl@0: 	Test the JumpToXCoord functionailty, confirming the positions by SingleStep calls
sl@0: */
sl@0: void TestLine::TestJumpToXCoord()
sl@0: 	{
sl@0: 	TInt xc1=(iStart.iX+iFinish.iX)>>1;
sl@0: 	TInt xc2=iStart.iX;
sl@0: 	TInt xc3=iFinish.iX;
sl@0: 	TInt xc4=Min(iStart.iX,iFinish.iX)-Abs(xc1);
sl@0: 	TInt xc5=Max(iStart.iX,iFinish.iX)+Abs(xc1);
sl@0: 	TInt y=0;
sl@0: 	TPoint intersect,point;
sl@0: 	TLinearDDA line;
sl@0: 	iLine.JumpToXCoord(xc1,y);
sl@0: 	line.Construct(iStart,iFinish);
sl@0: 	while(!line.SingleStep(point))
sl@0: 		if(point.iX==xc1)
sl@0: 			break;
sl@0: 	iTest->TEST(y==point.iY);
sl@0: 	while(!iLine.SingleStep(point))
sl@0: 		{
sl@0: 		line.SingleStep(intersect);
sl@0: 		iTest->TEST(point.iX==intersect.iX);
sl@0: 		iTest->TEST(point.iY==intersect.iY);
sl@0: 		}
sl@0: 	TBool done=line.SingleStep(intersect);
sl@0: 	iTest->TEST(done);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToXCoord(xc2,y);
sl@0: 	iTest->TEST(y==iStart.iY);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToXCoord(xc3,y);
sl@0: 	iLine.SingleStep(point);
sl@0: 	iTest->TEST(point.iX==xc3);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToXCoord(xc4,y);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToXCoord(xc5,y);
sl@0: 	}
sl@0: 
sl@0: /** 
sl@0: 	TestLine::TestJumpToYCoord
sl@0: 	
sl@0: 	Test the JumpToYCoord functionailty, confirming the positions by SingleStep calls
sl@0: */
sl@0: void TestLine::TestJumpToYCoord()
sl@0: 	{
sl@0: 	TInt yc1=(iStart.iY+iFinish.iY)>>1;
sl@0: 	TInt yc2=iStart.iY;
sl@0: 	TInt yc3=iFinish.iY;
sl@0: 	TInt yc4=Min(iStart.iY,iFinish.iY)-Abs(yc1);
sl@0: 	TInt yc5=Max(iStart.iY,iFinish.iY)+Abs(yc1);
sl@0: 	TInt x=0;
sl@0: 	TPoint intersect,point;
sl@0: 	TLinearDDA line;
sl@0: 	iLine.JumpToYCoord(x,yc1);
sl@0: 	line.Construct(iStart,iFinish);
sl@0: 	while(!line.SingleStep(point))
sl@0: 		if(point.iY==yc1)
sl@0: 			break;
sl@0: 	iTest->TEST(TPoint(x,yc1)==point);
sl@0: 	while(!iLine.SingleStep(point))
sl@0: 		{
sl@0: 		line.SingleStep(intersect);
sl@0: 		iTest->TEST(point==intersect);
sl@0: 		}
sl@0: 	TBool done=line.SingleStep(intersect);
sl@0: 	iTest->TEST(done);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToYCoord(x,yc2);
sl@0: 	iTest->TEST(x==iStart.iX);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToYCoord(x,yc3);
sl@0: 	iLine.SingleStep(point);
sl@0: 	iTest->TEST(point.iY==yc3);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToYCoord(x,yc4);
sl@0: 	iLine.Construct(iStart,iFinish);
sl@0: 	iLine.JumpToYCoord(x,yc5);
sl@0: 	}
sl@0: