// Copyright (c) 2004-2009 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 <hal.h>

#include <e32math.h>

#include "TAlphaBlend.h"

const TInt KWidth = 10;//Used in alpha blending tests

const TInt KHeight = 3;//Used in alpha blending tests

const TInt KMaximumAttempts = 2;	// Allow retries on some tests, due to spurious InfoPrints 

TBool iExtraLogging1=EFalse;		//Used to trigger logging at times the test fails

TBool iExtraLogging2=EFalse;		//Used to trigger logging at times the test fails

CTAlphaBlending::CTAlphaBlending(CTestStep* aStep):

	CTGraphicsBase(aStep),

	iDevice(NULL),

	iGc(NULL)

	{

	}

CTAlphaBlending::~CTAlphaBlending()

	{

	DeleteGraphicsContext();

	DeleteScreenDevice();

	}

void CTAlphaBlending::RunTestCaseL(TInt aCurTestCase)

	{

	((CTAlphaBlendingStep*)iStep)->SetTestStepID(KUnknownSYMTestCaseIDName);

	switch(aCurTestCase)

		{

	case 1:

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0024"));

		INFO_PRINTF1(_L("Alpha blending"));

		TestAlphaBlendingL();

		break;		

	case 2:

/**

@SYMTestCaseID		GRAPHICS-BITGDI-0114

*/

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0114"));

		INFO_PRINTF1(_L("Alpha blending 2"));

		TestAlphaBlending2L();

		break;

	case 3:

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0085"));

 		INFO_PRINTF1(_L("Alpha blending Correctness test 16MU 16MA"));

 		TestAlphaBlendCorrect(EColor16MU, EColor16MU);

 		break;

 	case 4:

 		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0097"));

 		INFO_PRINTF1(_L("Alpha plot test"));

		TestAlphaBlendingPlotL();

		break;

	case 5:

/**

@SYMTestCaseID		GRAPHICS-BITGDI-0115

*/

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0115"));

		INFO_PRINTF1(_L("Draw bitmap blending"));

		DoDrawBitmapTestsL();

		break;

	case 6:

		//DEF118268

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(_L("GRAPHICS-BITGDI-0085"));

		INFO_PRINTF1(_L("Alpha blending Correctness test 16M 16MA"));

		TestAlphaBlendCorrect(EColor16M, EColor16MA);

		break;

	case 7:

		((CTAlphaBlendingStep*)iStep)->SetTestStepID(KNotATestSYMTestCaseIDName);

		((CTAlphaBlendingStep*)iStep)->CloseTMSGraphicsStep();

		TestComplete();

		break;

		}

	((CTAlphaBlendingStep*)iStep)->RecordTestResultL();

	}

TInt CTAlphaBlending::CreateScreenDevice(TDisplayMode aDisplayMode, CFbsBitGc::TGraphicsOrientation aOrientation)

	{

	DeleteGraphicsContext();

	DeleteScreenDevice();

	TRAPD(err, iDevice = CFbsScreenDevice::NewL(_L("scdv"), aDisplayMode));

	if(err == KErrNotSupported)

		{

		return err;

		}

	TEST2(err, KErrNone);

	err = iDevice->CreateContext((CGraphicsContext*&)iGc);

	TEST2(err, KErrNone);

	if (!iGc->SetOrientation(aOrientation))

		{

		return(KErrNotSupported);

		}

	iGc->SetUserDisplayMode(aDisplayMode);

	iDevice->ChangeScreenDevice(NULL);

	iDevice->SetAutoUpdate(EFalse);

	return err;

	}

void CTAlphaBlending::DeleteScreenDevice()

	{

	delete iDevice;

	iDevice = NULL;

	}

void CTAlphaBlending::DeleteGraphicsContext()

	{

	delete iGc;

	iGc = NULL;

	}

// returns the pixel colour from the provided bitmap in aarrggbb format

// if pixel is outside the bitmaps limits return top left pixel

TUint32 CTAlphaBlending::GetRawPixel(CFbsBitmap* aBitmap, TPoint aPos)

	{

	TBitmapUtil bmpUtil(aBitmap);	

	TUint32 value = 0;

	ASSERT(aPos.iX>=0 && aPos.iY>=0);

	ASSERT(aPos.iX<aBitmap->SizeInPixels().iWidth && aPos.iY<aBitmap->SizeInPixels().iHeight);

	bmpUtil.Begin(aPos);

	value = bmpUtil.GetPixel();

	bmpUtil.End();

	return value;	

	}

/**

@SYMTestCaseID		GRAPHICS-BITGDI-0097

@SYMDEF             DEF113229

@SYMTestCaseDesc    CDrawThirtyTwoBppBitmapCommon::WriteRgb did not change the dest alpha value to 255 when 

					the dest alpha was >0 and <255 and the a soure pen had an alpha of 255	

@SYMTestPriority    Normal

@SYMTestStatus      Implemented

@SYMTestActions     Creates a bitmap, clears it to black (destination) 50% opaque then plots a series of points 

					with a 100% opaque pen on it. Tests the resultant alpha value.

@SYMTestExpectedResults Final alpha value should be 255

**/

void CTAlphaBlending::TestAlphaBlendingPlotL()

	{

	const TSize KRectSize(100,100);

	const TRect KTargetRect(TPoint(0,0), KRectSize);

	// create the target bitmap

	CFbsBitmap* destBmp = new (ELeave) CFbsBitmap;

	CleanupStack::PushL(destBmp);

	User::LeaveIfError(destBmp->Create(KRectSize, EColor16MA));

	destBmp->SetSizeInTwips(KRectSize);

	// create bitmap device and graphics context

	CFbsBitmapDevice* destBmpDevice = CFbsBitmapDevice::NewL(destBmp);

	CleanupStack::PushL(destBmpDevice);

	CFbsBitGc* destGc = NULL;

	User::LeaveIfError(destBmpDevice->CreateContext(destGc));

	CleanupStack::PushL(destGc);

	destGc->SetPenStyle(CGraphicsContext::ENullPen);

	destGc->SetBrushStyle(CGraphicsContext::ESolidBrush);

	TDisplayMode screenMode = EColor16MA;

	TInt err = CreateScreenDevice(screenMode);

	if (err != KErrNone)

		{

		screenMode = EColor64K;

		err = CreateScreenDevice(screenMode);

		}

	if(err==KErrNone)

		{

		const TInt KSqrMin=45;

		const TInt KSqrMax=55;

		iGc->SetUserDisplayMode(screenMode);

		destGc->SetBrushColor(TRgb(0,0,0,127));

		destGc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);

		destGc->Clear(KTargetRect);

		// copy over to screen dc for anyone watching

		iGc->BitBlt(TPoint(0,0), destBmp, KTargetRect);

		iDevice->Update();

		// set the pen colour to white and plot some points

		destGc->SetDrawMode(CGraphicsContext::EDrawModePEN);

		destGc->SetPenStyle(CGraphicsContext::ESolidPen);

		destGc->SetPenColor(TRgb(0,70,130,255));

		for( TInt y=KSqrMin;y<=KSqrMax;y++)

			{

			for( TInt x=KSqrMin;x<=KSqrMax;x++)

				{

				destGc->Plot(TPoint(x,y));

				}

			}

		// copy over to screen dc for anyone watching

		iGc->BitBlt(TPoint(0,0), destBmp, KTargetRect);

		iDevice->Update();

		TUint32 actualValue=0;

		// check the resulting values alpha values are 0xFF in the square we drew

		for( TInt y=KSqrMin;y<=KSqrMax;y++)

			{

			for( TInt x=KSqrMin;x<=KSqrMax;x++)

				{

				actualValue = GetRawPixel(destBmp, TPoint(x,y));

				if( (actualValue&0xFF000000) != 0xFF000000 )

					{

					TEST(EFalse);

					INFO_PRINTF2(_L("TestAlphaBlendingPlotL() ***FAILED*** - expected alpha value 0xFF got %d "),((actualValue&0xFF000000)>>24));

					}

				}

			}

		}

		CleanupStack::PopAndDestroy(3); //destGc,destBmpDevice,destBmp

	}

/**

  @SYMTestCaseID GRAPHICS-BITGDI-0024

  @SYMDEF             

  @SYMTestCaseDesc 

	System, GT0173 System Libraries, BITGDI support required for semi-transparent windows

	DEF039083 - Using BitBltMasked to do alpha-blending only works if your brush style is "null"

	DEF039409 - Wrong part of Alpha Bitmap is used when there is a clipping region 

	DEF039669 - The UserDisplayMode is not honoured during the AlphaBlendBitmap function. 

	REQ3413 Second overload of CFbsBitGc's AlphaBlendBitmaps - "Supply a second overload of 

	CFbsBitGc's AlphaBlendBitmaps function, but with one of the source bitmaps being passed 

	as a CFbsBitGc object, so that the screen can be used as a source."

  @SYMTestPriority High

  @SYMTestStatus Implemented

  @SYMTestActions 

  	Tests alpha blending - for all display modes, some brush styles, user display modes, 

	different positions on the screen.

	Shadow/fade mode is no more tested, because the existing BitBltMasked() and the new 

	AlphaBlendBitmaps() methods treat it a different way - see MAlphaBlend interface in

	ScreenDriver component.

  @SYMTestExpectedResults Test should perform graphics operations succesfully. 

*/

void CTAlphaBlending::TestAlphaBlendingL()

	{

	TPoint originPt(0, 0);

	TPoint destPt(0, 0);

	TRect scrRc1(0, 0, KWidth, KHeight);

	TPoint srcPt2(0, 0);

	TPoint alphaPt(0, 0);

	//

	//If we compare CFbsBitGc::BitBltMasked() aguments with CFbsBitGc::AlphaBlending() arguments,

	//we will see that AlphaBlending() has more arguments than BitBltMasked() - 

	//srcPt2, alphaPt. To make it possible - the comparison between these two methods,

	//we have to change aAlphaPt and aSrcPt2 values accordingly with the changes of scrRc1 value.

	//

	//test 1 - the origin is moved

	originPt = TPoint(97, 33);

	DoAlphaBlendingTestsL(originPt, destPt, scrRc1, srcPt2, alphaPt);

#if !defined(__X86GCC__)	//These test take too long to run in X86GCC

	//test 2 - the origin is (0, 0)

	originPt = TPoint(0, 0);

	DoAlphaBlendingTestsL(originPt, destPt, scrRc1, srcPt2, alphaPt);

	//test 3 - scrRect1 is not (0, 0, KWidth, KHeight)

	scrRc1 = TRect(3, 1, KWidth, KHeight);

	alphaPt = TPoint(3, 1);

	DoAlphaBlendingTestsL(originPt, destPt, scrRc1, srcPt2, alphaPt);

	//test 4 - restore scrRc1 and alphaPt, move the destination point

	scrRc1 = TRect(0, 0, KWidth, KHeight);

	alphaPt = TPoint(0, 0);

	destPt = TPoint(13, 17);

	iExtraLogging1=ETrue;

	DoAlphaBlendingTestsL(originPt, destPt, scrRc1, srcPt2, alphaPt);

	iExtraLogging1=EFalse;

#endif	//__X86GCC__

	}

void CTAlphaBlending::DoDrawBitmapTestsL()

	{

	TDisplayMode modes[] = {EColor16MA, EColor16MAP, EColor16MU, EColor16M, EColor256, EColor4K, EColor64K, 

						   EGray256, EGray16, EGray4, EGray2, EColor16};

	const TInt KNumTestDisplayModes=sizeof(modes)/sizeof(modes[0]);

	for(TInt modeIndex=0;modeIndex<KNumTestDisplayModes;modeIndex++)

		{

		TDisplayMode screenMode=modes[modeIndex];

		if (CreateScreenDevice(screenMode)!=KErrNone)

			continue;

		DoDrawBitmapTestL(screenMode);

		}

	}

void CTAlphaBlending::DoDrawBitmapTestL(TDisplayMode aTestDisplayMode)

	{

	iGc->Reset();

	TBool alphaSupported=(aTestDisplayMode==EColor16MA || aTestDisplayMode==EColor16MAP);

	TSize screenSize=iDevice->SizeInPixels();

//

	const TInt KNumTestSrcSizes=4;

	const TSize testSrcSizes[KNumTestSrcSizes]={TSize(2,2),TSize(20,10),TSize(200,5),TSize(55,555)};

	for(TInt srcSizeIndex=0;srcSizeIndex<KNumTestSrcSizes;srcSizeIndex++)

		{

		TSize srcSize(testSrcSizes[srcSizeIndex]);

//

		CFbsBitmap* srcBmp=new(ELeave) CFbsBitmap;

		CleanupStack::PushL(srcBmp);

		User::LeaveIfError(srcBmp->Create(srcSize,aTestDisplayMode));

		CFbsBitmapDevice* srcDevice = CFbsBitmapDevice::NewL(srcBmp);

		CleanupStack::PushL(srcDevice);

		CFbsBitGc* srcGc=NULL;

		User::LeaveIfError(srcDevice->CreateContext(srcGc));

		CleanupStack::PushL(srcGc);

//

		CFbsBitmap* srcAlpha=new(ELeave) CFbsBitmap;

		CleanupStack::PushL(srcAlpha);

		User::LeaveIfError(srcAlpha->Create(srcSize,aTestDisplayMode));

		CFbsBitmapDevice* srcAlphaDevice = CFbsBitmapDevice::NewL(srcAlpha);

		CleanupStack::PushL(srcAlphaDevice);

		CFbsBitGc* srcAlphaGc=NULL;

		User::LeaveIfError(srcAlphaDevice->CreateContext(srcAlphaGc));

		CleanupStack::PushL(srcAlphaGc);

		srcAlphaGc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);

//

		CFbsBitmap* srcMask=new(ELeave) CFbsBitmap;

		CleanupStack::PushL(srcMask);

		User::LeaveIfError(srcMask->Create(srcSize,EGray256));

		CFbsBitmapDevice* srcMaskDevice = CFbsBitmapDevice::NewL(srcMask);

		CleanupStack::PushL(srcMaskDevice);

		CFbsBitGc* srcMaskGc=NULL;

		User::LeaveIfError(srcMaskDevice->CreateContext(srcMaskGc));

		CleanupStack::PushL(srcMaskGc);

//

		TInt maxX=srcSize.iWidth-1;

		TInt maxY=srcSize.iHeight-1;

		for(TInt yLoop=0;yLoop<srcSize.iHeight;yLoop++)

			{

			for(TInt xLoop=0;xLoop<srcSize.iWidth;xLoop++)

				{

				TPoint plotPos(xLoop,yLoop);

				TRgb pen(xLoop*255/maxX,yLoop*255/maxY,(xLoop+yLoop)*128/(maxX+maxY));

				srcGc->SetPenColor(pen);

				srcGc->Plot(plotPos);

				TInt alpha=(xLoop+yLoop)*255/(maxX+maxY);

				pen.SetAlpha(alpha);

				srcAlphaGc->SetBrushColor(pen);

				srcAlphaGc->Clear(TRect(plotPos,TSize(1,1)));

				srcMaskGc->SetPenColor(TRgb::Gray256(alpha));

				srcMaskGc->Plot(plotPos);

				}

			}

		const TInt KNumTestTargSizes=5;

		const TSize testTargSizes[KNumTestTargSizes]={TSize(0,0), TSize(20,1),TSize(30,20),TSize(200,31),TSize(55,5)};

		for(TInt targSizeIndex=0;targSizeIndex<KNumTestSrcSizes;targSizeIndex++)

			{

			TSize targSize(testTargSizes[targSizeIndex]);

			if (targSizeIndex==0)

				{

				targSize=srcSize;	// Special case with no scaling

				if (targSize.iWidth>screenSize.iWidth)

					targSize.iWidth=screenSize.iWidth;

				TInt maxHeight=screenSize.iHeight/3;

				if (targSize.iHeight>maxHeight)

					targSize.iHeight=maxHeight;

				}

//

			CFbsBitmap* targBmp=new(ELeave) CFbsBitmap;

			CleanupStack::PushL(targBmp);

			User::LeaveIfError(targBmp->Create(targSize,aTestDisplayMode));

			CFbsBitmapDevice* targBmpDevice = CFbsBitmapDevice::NewL(targBmp);

			CleanupStack::PushL(targBmpDevice);

			CFbsBitGc* targGc=NULL;

			User::LeaveIfError(targBmpDevice->CreateContext(targGc));

			CleanupStack::PushL(targGc);

//

			CFbsBitmap* targMask=new(ELeave) CFbsBitmap;

			CleanupStack::PushL(targMask);

			User::LeaveIfError(targMask->Create(targSize,EGray256));

			CFbsBitmapDevice* targMaskDevice = CFbsBitmapDevice::NewL(targMask);

			CleanupStack::PushL(targMaskDevice);

			CFbsBitGc* targMaskGc=NULL;

			User::LeaveIfError(targMaskDevice->CreateContext(targMaskGc));

			CleanupStack::PushL(targMaskGc);

//

			TPoint drawPos;

			TRect testRect1(targSize);

			iGc->Clear();

// First we pre-stretch the source and mask bitmaps into temp bitmaps

			targGc->DrawBitmap(TRect(targSize),srcBmp);

			targMaskGc->DrawBitmap(TRect(targSize),srcMask);

// Then blend them onto the screen with a call to BitBltMasked

			iGc->BitBltMasked(drawPos,targBmp,TRect(targSize),targMask,EFalse);

			drawPos.iY+=targSize.iHeight;

			TRect testRect2(drawPos,targSize);

// Next we combine the stretching and masking with one call to DrawBitmapMasked,

// this should give the same end result.

			iGc->DrawBitmapMasked(testRect2,srcBmp,TRect(srcSize),srcMask,EFalse);

			TRect testRect3;

			if (alphaSupported)

				{

// Finally if alpha blending supported we stretch and blend, again to achieve the exact same end result

// as the two previous calls. This was specificially done to catch DEF116427.

				drawPos.iY+=targSize.iHeight;

				testRect3=TRect(drawPos,targSize);

				iGc->DrawBitmap(testRect3,srcAlpha);

				}

//Use this just to check what we've put in the test bitmaps

/*

			drawPos.iY+=targSize.iHeight+1;

			iGc->BitBlt(drawPos,srcBmp);

			drawPos.iY+=srcSize.iHeight+1;

			iGc->BitBlt(drawPos,srcMask);

			drawPos.iY+=srcSize.iHeight+1;

			if (alphaSupported)

				iGc->BitBlt(drawPos,srcAlpha);

*/

		   	iDevice->Update();

			TBool ret1=iDevice->RectCompare(testRect1,*iDevice,testRect2);

		   	TBool ret2=alphaSupported?iDevice->RectCompare(testRect1,*iDevice,testRect3):ETrue;

			if (!ret1 || !ret2)

				{

				INFO_PRINTF4(_L("DrawBitmapTest, ret1=%d, ret2=%d, Screen mode=%d"),ret1,ret2,aTestDisplayMode);

				TEST(EFalse);

				}

			CleanupStack::PopAndDestroy(3,targMask);

			CleanupStack::PopAndDestroy(3,targBmp);

			}

		CleanupStack::PopAndDestroy(3,srcMask);

		CleanupStack::PopAndDestroy(3,srcAlpha);

		CleanupStack::PopAndDestroy(3,srcBmp);

		}

	}

//Tests alpha blending - for all display modes, some brush styles, user display modes, 

//different positions on the screen.

void CTAlphaBlending::DoAlphaBlendingTestsL(const TPoint& aOrigin,

										const TPoint& aDestPt, 

										const TRect& aSrcRc1, 

										const TPoint& aScrPt2,

										const TPoint& aAlphaPt)

	{

	TBuf<128> buf;

	_LIT(KLog,"Origin=(%d,%d) DestPt=(%d,%d) SrcRect=(%d,%d,%d,%d) ScrPt=(%d,%d) AlphaPt=(%d,%d)");

	buf.Format(KLog,aOrigin.iX,aOrigin.iY,aDestPt.iX,aDestPt.iY,aSrcRc1.iTl.iX,aSrcRc1.iTl.iY

						,aSrcRc1.iBr.iX,aSrcRc1.iBr.iY,aScrPt2.iX,aScrPt2.iY,aAlphaPt.iX,aAlphaPt.iY);

	INFO_PRINTF1(buf);

	TDisplayMode mode[] = {EColor16MA, EColor16MAP, EColor16MU, EColor16M, EColor256, EColor4K, EColor64K,

						   EGray256, EGray16, EGray4, EGray2, EColor16};

	CFbsBitmap* screenBmp = NULL;

	CFbsBitmap* srcBmp = NULL;

	CFbsBitmap* alphaBmp = NULL;

	CGraphicsContext::TBrushStyle brushStyle[] = {CGraphicsContext::ENullBrush, CGraphicsContext::ESolidBrush};

	for(TInt i=0;i<TInt(sizeof(mode)/sizeof(mode[0]));i++)

		{

		for(TInt orientation=0;orientation<=CFbsBitGc::EGraphicsOrientationRotated270;orientation++)

			{

			if (CreateScreenDevice(mode[i],(CFbsBitGc::TGraphicsOrientation)orientation) != KErrNone)

				{

				continue;

				}

			iExtraLogging2=(iExtraLogging1 && mode[i]==11);

	 		INFO_PRINTF3(_L("Mode=%d, Orientation=%d"), mode[i], orientation);

			CreateAlphaBlendingBitmapsLC(screenBmp, srcBmp, alphaBmp, mode[i]);

			for(TInt j=0;j<TInt(sizeof(brushStyle)/sizeof(brushStyle[0]));j++)

				{

				if(mode[i] == EGray4 && brushStyle[j] == CGraphicsContext::ESolidBrush)

					{

					//When the display mode is EGray4 - Flicker-free blitting is not enabled.

					//The screen will be filled with 0xFF color, which is not the same color used by

					//the test - 0x00. And BitBltMasked and AlphaBlendBitmaps will produce different results.

					continue;

					}

				iGc->SetOrigin(aOrigin);

				iGc->SetBrushStyle(brushStyle[j]);

				TDisplayMode userDisplayMode[] = {EColor16MA, EColor16MAP, EColor16MU, EColor16M, EColor256, 

												  EColor4K, EColor64K, EGray256, 

												  EGray16, EGray4, EGray2, EColor16};

				for(TInt l=0;l<TInt(sizeof(userDisplayMode)/sizeof(userDisplayMode[0]));l++)

					{

					iGc->SetUserDisplayMode(userDisplayMode[l]);

					TSize scrDevSize = iDevice->SizeInPixels();

					TRect clipRc[] = {TRect(0, 0, scrDevSize.iWidth, scrDevSize.iHeight),

										TRect(0, 1, scrDevSize.iWidth, scrDevSize.iHeight), // Tests Y clipping only

										TRect(5, 0, scrDevSize.iWidth, scrDevSize.iHeight), // Tests X clipping only

										TRect(5, 1, scrDevSize.iWidth, scrDevSize.iHeight),

										TRect(3, 0, 14, 23)};//14 and 23 values are not accidental! 

															 //Sometimes the method is called with aDestPt(13, 17).

					for(TInt k=0;k<TInt(sizeof(clipRc)/sizeof(clipRc[0]));k++)

						{

						if (iExtraLogging2)

							{

							_LIT(KLog,"  BrushStyle=%d UserDisplayMode=%d ClipRect=(%d,%d,%d,%d)");

			 				INFO_PRINTF7(KLog,j,l,clipRc[k].iTl.iX,clipRc[k].iTl.iY,clipRc[k].iBr.iX,clipRc[k].iBr.iY);

							}

						iGc->Clear();

						iGc->SetClippingRect(clipRc[k]);

						DoAlphaBlendingTestL(screenBmp, srcBmp, alphaBmp, aDestPt, aSrcRc1, aScrPt2, aAlphaPt);

						iGc->CancelClippingRect();

						}

					}//end of - for(TInt l=0;l<TInt(sizeof(userDisplayMode)/sizeof(userDisplayMode[0]));l++)

				iGc->SetOrientation(CFbsBitGc::EGraphicsOrientationNormal);

				}

			DestroyAlphaBlendingBitmaps(screenBmp, srcBmp, alphaBmp);

			}//end of - for(TInt j=0;j<TInt(sizeof(brushStyle)/sizeof(brushStyle[0]));j++)

		}//end of - for(TInt i=0;i<TInt(sizeof(mode)/sizeof(mode[0]));i++)

	}

//The method compares results of two alpha blending methods:

//iGc->BitBltMasked() and iGc->AlphaBlendBitmaps().

//To make that possible, aScreenBmp is copied to the screen before the call of

//iGc->BitBltMasked().

void CTAlphaBlending::DoAlphaBlendingTestL(CFbsBitmap* aScreenBmp, 

									   const CFbsBitmap* aSrcBmp, 

									   const CFbsBitmap* aAlphaBmp,

									   const TPoint& aDestPt, 

									   const TRect& aSrcRc1, 

									   const TPoint& aSrcPt2,

									   const TPoint& aAlphaPt)

	{

	_LIT(KScreenBmpFile, "C:\\BMP_DATA.DAT");

	iGc->SetShadowMode(EFalse);

   	TInt i;

   	TInt res = -1;

	TSize scrDevSize = iDevice->SizeInPixels();

	TInt allocatedSize = scrDevSize.iWidth * scrDevSize.iHeight * 2;

	TRect screenBmpRc;

   	//The screen alpha blended data after calling of BitBltMasked() - will be filled after the call

	TUint8* screenBmpDestData1 = new (ELeave) TUint8[allocatedSize];

	CleanupStack::PushL(screenBmpDestData1);

   	//The screen alpha blended data after calling of AlphaBlendingBitmaps() - will be filled after the call

	TUint8* screenBmpDestData2 = new (ELeave) TUint8[allocatedSize];

	CleanupStack::PushL(screenBmpDestData2);

	// Allow an effective restart of the test, since sometimes there are spurious

	// InfoPrints that affect the comparisons.

	for (TInt attempt = 0; res && (attempt < KMaximumAttempts); attempt++)

		{

		//Fill the blocks with some default value

		Mem::Fill(screenBmpDestData1, allocatedSize, 0xCA);

		Mem::Fill(screenBmpDestData2, allocatedSize, 0xCA);

	   	//Check screen bitmap size

	   	TSize screenBmpSize = aScreenBmp->SizeInPixels();

	   	if ((screenBmpSize.iWidth != KWidth) || (screenBmpSize.iHeight != KHeight))

	   		{

	   		_LIT(KScreenErr,"DoAlphaBlendingTestL test: w:%d!=%d || h:%d!=%d");

	   		INFO_PRINTF5(KScreenErr, screenBmpSize.iWidth, KWidth, screenBmpSize.iHeight, KHeight);

	   		TEST(EFalse);

	   		}

		//  Alpha blending using CFbsBitGc::BitBltMasked  //

		if (iExtraLogging2)

			{

			_LIT(KLog1,"    CFbsBitGc::BitBltMasked test");

			INFO_PRINTF1(KLog1);

			}

		//Screen bitmap rectangle

		screenBmpRc.SetRect(aDestPt, TSize(aSrcRc1.Width(), aSrcRc1.Height()));

		//Save screen bitmap 

		TInt saveAttempts = 5;

		TInt err = aScreenBmp->Save(KScreenBmpFile);

		while ((err != KErrNone) && saveAttempts--)

			{

			// Retry the save

			_LIT(KSaveRetry,"DoAlphaBlendingTestL: Bitmap save failed, retrying.");

			INFO_PRINTF1(KSaveRetry);

			User::After(10000); 

			err = aScreenBmp->Save(KScreenBmpFile);

			}

		User::LeaveIfError(err);

		User::LeaveIfError(aScreenBmp->Resize(TSize(aSrcRc1.Width(), aSrcRc1.Height())));

		//Draw screen bitmap

	   	iGc->Clear();

		iGc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);

		iGc->DrawBitmap(screenBmpRc, aScreenBmp);

	   	iDevice->Update();

	   	//Do BitBltMasked()

	   	iGc->BitBltMasked(aDestPt, aSrcBmp, aSrcRc1, aAlphaBmp, EFalse);

	   	iDevice->Update();

		//Get screen data and write the data to screenBmpDestData1.

		for(i=0;i<scrDevSize.iHeight;i++)

	   		{

			TPtr8 p(screenBmpDestData1 + i * scrDevSize.iWidth * 2, scrDevSize.iWidth * 2, scrDevSize.iWidth * 2);

			iDevice->GetScanLine(p, TPoint(0, i), scrDevSize.iWidth, EColor64K);

	   		}

		//  Alpha blending using explicit form of CFbsBitGc::AlphaBlendBitmaps  //

		if (iExtraLogging2)

			{

			_LIT(KLog2,"    CFbsBitGc::AlphaBlendBitmaps explicit test");

			INFO_PRINTF1(KLog2); 

			}

		//Clear screen

	   	iGc->Clear();

	   	iDevice->Update();

		//Load screen bitmap 

		User::LeaveIfError(aScreenBmp->Load(KScreenBmpFile));

	   	//Do AlphaBlendBitmaps()

	   	User::LeaveIfError(iGc->AlphaBlendBitmaps(aDestPt, aSrcBmp, aScreenBmp, aSrcRc1, 

													aSrcPt2, aAlphaBmp, aAlphaPt));

	   	iDevice->Update();

		//Get screen data and write the data to screenBmpDestData2.

		for(i=0;i<scrDevSize.iHeight;i++)

	   		{

			TPtr8 p(screenBmpDestData2 + i * scrDevSize.iWidth * 2, scrDevSize.iWidth * 2, scrDevSize.iWidth * 2);

			iDevice->GetScanLine(p, TPoint(0, i), scrDevSize.iWidth, EColor64K);

	   		}

		//Compare screen bitmaps //

		res = Mem::Compare(screenBmpDestData1, allocatedSize, screenBmpDestData2, allocatedSize);

		// colour comparison tolerance between RGB565 components.

		const TInt KColourComparisonTolerance = 2;

		if (res)

			{

			TBool testPassed = ETrue;

			// strict byte-for-byte comparison of the pixel maps could have failed because blending algorithms may  

			// differ slightly, but actual resulting colours may be close enough

			for (int byteNumber = 0; byteNumber < allocatedSize; byteNumber+=2)

				{

				// find any RGB565 value that doesn't match and examine each component

				if ( *(TUint16*)(screenBmpDestData1 + byteNumber) != *(TUint16*)(screenBmpDestData2 + byteNumber))

					{

					TUint16 Rgb1 = *(TUint16*)(screenBmpDestData1 + byteNumber);

					TUint16 Rgb2 = *(TUint16*)(screenBmpDestData2 + byteNumber);

					TInt16 Red1 = (Rgb1 & 0xF800) >> 11;

					TInt16 Red2 = (Rgb2 & 0xF800) >> 11;

					TInt16 DiffRed = Abs(Red1 - Red2);

					TInt16 Green1 = (Rgb1 & 0x07E0) >> 5;

					TInt16 Green2 = (Rgb2 & 0x07E0) >> 5;

					TInt16 DiffGreen = Abs(Green1 - Green2);

					TInt16 Blue1 = (Rgb1 & 0x001F);

					TInt16 Blue2 = (Rgb2 & 0x001F);

					TInt16 DiffBlue = Abs(Blue1 - Blue2);

					// is any difference is outside the tolerance break out signaling test failure

					if (DiffRed > KColourComparisonTolerance || 

						DiffGreen > KColourComparisonTolerance || 

						DiffBlue > KColourComparisonTolerance)

						{

						testPassed = EFalse;

						break;

						}

					}

				}

			if (testPassed)

				{

				res = 0;

				}

			}

		if (res && (attempt < KMaximumAttempts - 1))

			{

			INFO_PRINTF1(_L("Memory comparison 1 failed, retrying"));

			// Skip to next attempt

			continue;

			}

		TEST(res == 0);

		//  Alpha blending using implicit form of CFbsBitGc::AlphaBlendBitmaps  //

		if (iExtraLogging2)

			{

			_LIT(KLog3,"    CFbsBitGc::AlphaBlendBitmaps implicit test");

			INFO_PRINTF1(KLog3);

			}

		//Clear screen

	   	iGc->Clear();

	   	iDevice->Update();

		//Draw screen bitmap (it's already loaded)

		User::LeaveIfError(aScreenBmp->Resize(TSize(aSrcRc1.Width(), aSrcRc1.Height())));

		iGc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);

		iGc->DrawBitmap(screenBmpRc, aScreenBmp);

	   	iDevice->Update();

	   	//Do AlphaBlendBitmaps()

	   	User::LeaveIfError(iGc->AlphaBlendBitmaps(aDestPt, aSrcBmp, aSrcRc1, aAlphaBmp, aSrcRc1.iTl));

	   	iDevice->Update();

		//Get screen data and write the data to screenBmpDestData2.

		for(i=0;i<scrDevSize.iHeight;i++)

	   		{

			TPtr8 p(screenBmpDestData2 + i * scrDevSize.iWidth * 2, scrDevSize.iWidth * 2, scrDevSize.iWidth * 2);

			iDevice->GetScanLine(p, TPoint(0, i), scrDevSize.iWidth, EColor64K);

	   		}

		//Compare screen bitmaps //

		if (iExtraLogging2)

			{

			_LIT(KLog4,"    Compare Screen Bitmaps");

			INFO_PRINTF1(KLog4);

			}

		res = Mem::Compare(screenBmpDestData1, allocatedSize, screenBmpDestData2, allocatedSize);

		if (res && (attempt < KMaximumAttempts - 1))

			{

			INFO_PRINTF1(_L("Memory comparison 2 failed, retrying"));

			}

		// Reload the screen bitmap as it was before:

		User::LeaveIfError(aScreenBmp->Load(KScreenBmpFile));

		}

	TEST(res == 0);

	//Destroy the allocated memory blocks

	CleanupStack::PopAndDestroy(2);//screenBmpDestData1 & screenBmpDestData2

	}

void CTAlphaBlending::CreateAlphaBlendingBitmapsLC(CFbsBitmap*& aScreenBmp, 

											   CFbsBitmap*& aSrcBmp, 

											   CFbsBitmap*& aAlphaBmp,

											   TDisplayMode aMode)

	{

	TInt i;

	TSize size(KWidth, KHeight);

	//The screen data

	TUint8 screenBmpSrcData[KHeight][KWidth * 3 + 2] = // "+ 2" - every row is aligned to a 32 bit boundary

		{//0               1                 2                 3                 4                 5                 6                 7                 8                 9     

		{0x00, 0x00, 0x00, 0x20, 0x21, 0x22, 0x30, 0x31, 0x32, 0x40, 0x41, 0x42, 0x50, 0x51, 0x51, 0x60, 0x61, 0x62, 0x70, 0x71, 0x72, 0x80, 0x81, 0x82, 0x90, 0x91, 0x92, 0xA0, 0xA1, 0xA2, 0x00, 0x00},

		{0x19, 0x18, 0x17, 0x29, 0x28, 0x27, 0x39, 0x38, 0x37, 0x49, 0x48, 0x47, 0x59, 0x58, 0x57, 0x69, 0x68, 0x67, 0x79, 0x78, 0x77, 0x89, 0x88, 0x87, 0x99, 0x98, 0x97, 0xA9, 0xA8, 0xA7, 0x00, 0x00},

		{0x1F, 0x1E, 0x1D, 0x2F, 0x2E, 0x2D, 0x3F, 0x3E, 0x3D, 0x4F, 0x4E, 0x4D, 0x5F, 0x5E, 0x5D, 0x6F, 0x6E, 0x6D, 0x7F, 0x7E, 0x7D, 0x8F, 0x8E, 0x8D, 0x9F, 0x9E, 0x9D, 0xAF, 0xAE, 0xAD, 0x00, 0x00}

		};

	//The source bitmap data

	TUint8 srcBmpData[KHeight][KWidth * 3 + 2] = // "+ 2" - every row is aligned to a 32 bit boundary

		{//0               1                 2                 3                 4                 5                 6                 7                 8                 9     

		{0x32, 0x67, 0xA2, 0x11, 0x34, 0x67, 0xC5, 0xA3, 0x91, 0x01, 0xB3, 0xA8, 0xF3, 0x3F, 0x1E, 0x88, 0x11, 0x12, 0xAE, 0xEE, 0x9A, 0x56, 0x12, 0x81, 0xB4, 0xCA, 0x91, 0xFF, 0x1A, 0x2A, 0x00, 0x00},

		{0x02, 0xB1, 0xE2, 0xAA, 0xBB, 0x13, 0x22, 0xA8, 0xC3, 0x75, 0x8D, 0xFF, 0xA4, 0xAB, 0x00, 0xC5, 0xA6, 0x22, 0xBB, 0x09, 0xC1, 0x97, 0x25, 0xC6, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0x00, 0x00},

		{0x32, 0x50, 0x76, 0x27, 0xCC, 0x45, 0x81, 0xE5, 0xE9, 0xB7, 0xCD, 0x11, 0x32, 0xB1, 0x23, 0xFF, 0x71, 0x11, 0xCC, 0xAA, 0xF2, 0x98, 0x13, 0x8C, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0x00, 0x00}

		};

	//The alpha bitmap data

	TUint8 alphaBmpData[KHeight][KWidth + 2] = // "+ 2" - every row is aligned to a 32 bit boundary

		{//0   1     2     3     4     5     6     7     8     9     

		{0x68, 0x68, 0x68, 0xAC, 0xD9, 0xB2, 0x8F, 0x11, 0xA0, 0xC1, 0x00, 0x00},

		{0x71, 0x5A, 0xF6, 0xEE, 0xF9, 0xE5, 0x06, 0x4C, 0xBB, 0x7B, 0x00, 0x00},

		{0x9F, 0x99, 0x45, 0x17, 0xA8, 0xF5, 0xFF, 0xD2, 0x22, 0x1D, 0x00, 0x00}

		};

	if(aMode == EColor16MU)

		{

		TInt buffer_size = KWidth * 4 ;

		TUint8* buffer = new(ELeave) TUint8[buffer_size];

		TPtr8 source_ptr(buffer, buffer_size, buffer_size);

		//Screen bitmap

		aScreenBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aScreenBmp);

		User::LeaveIfError(aScreenBmp->Create(size, aMode));

		for(i=0; i<KHeight; i++)

			{

			TUint8* bufCur = buffer;

			TUint8* bufSrcCur = screenBmpSrcData[i];

			TUint8* bufSrcEnd = bufSrcCur + KWidth * 3;

			while(bufSrcCur < bufSrcEnd)

				{

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = 0xff;

				}

			aScreenBmp->SetScanLine(source_ptr, i);

			}

		//Source bitmap

		aSrcBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aSrcBmp);

		User::LeaveIfError(aSrcBmp->Create(size, aMode));

		for(i=0; i<KHeight; i++)

			{

			TUint8* bufCur = buffer;

			TUint8* bufSrcCur = srcBmpData[i];

			TUint8* bufSrcEnd = bufSrcCur + KWidth * 3;

			while(bufSrcCur < bufSrcEnd)

				{

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = *bufSrcCur++;

				*bufCur++ = 0xff;

				}

			aSrcBmp->SetScanLine(source_ptr, i);

			}

		//Alpha bitmap

		aAlphaBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aAlphaBmp);

		User::LeaveIfError(aAlphaBmp->Create(size, EGray256));

		for(i=0;i<KHeight;i++)

			{

			TPtr8 p(alphaBmpData[i], KWidth * 3, KWidth * 3);

			aAlphaBmp->SetScanLine(p, i);

			}

		delete [] buffer;	

		}

	else

		{

		//Screen bitmap

		aScreenBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aScreenBmp);

		User::LeaveIfError(aScreenBmp->Create(size, aMode));

		for(i=0;i<KHeight;i++)

			{

			TPtr8 p(screenBmpSrcData[i], KWidth * 3, KWidth * 3);

			aScreenBmp->SetScanLine(p, i);

			}

		//Source bitmap

		aSrcBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aSrcBmp);

		User::LeaveIfError(aSrcBmp->Create(size, aMode));

		for(i=0;i<KHeight;i++)

			{

			TPtr8 p(srcBmpData[i], KWidth * 3, KWidth * 3);

			aSrcBmp->SetScanLine(p, i);

			}

		//Alpha bitmap

		aAlphaBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(aAlphaBmp);

		User::LeaveIfError(aAlphaBmp->Create(size, EGray256));

		for(i=0;i<KHeight;i++)

			{

			TPtr8 p(alphaBmpData[i], KWidth * 3, KWidth * 3);

			aAlphaBmp->SetScanLine(p, i);

			}

		}	

	}

void CTAlphaBlending::DestroyAlphaBlendingBitmaps(CFbsBitmap*& aScreenBmp, 

											  CFbsBitmap*& aSrcBmp, 

											  CFbsBitmap*& aAlphaBmp)

	{

	CleanupStack::PopAndDestroy(aAlphaBmp);

	aAlphaBmp = NULL;

	CleanupStack::PopAndDestroy(aSrcBmp);

	aSrcBmp = NULL;

	CleanupStack::PopAndDestroy(aScreenBmp);

	aScreenBmp = NULL;

	}

//The test doesn't check anything. It is for debugging only.

void CTAlphaBlending::TestAlphaBlending2L()

	{

	static const TDisplayMode modeList[] = {

			EColor64K, EColor256, EColor16MAP, EColor16MA, EColor16MU, EColor4K

	};

	const TInt KNumTestDisplayModes=sizeof(modeList)/sizeof(modeList[0]);

	for(TInt orientation=0;orientation<=CFbsBitGc::EGraphicsOrientationRotated270;orientation++)

		{

		CFbsBitmap* srcBmp = NULL;

		CFbsBitmap* alphaBmp = NULL;

		TInt err = KErrNotSupported;

		// Try several modes

		for (TInt modeIndex = 0; (err != KErrNone) && modeIndex < KNumTestDisplayModes; modeIndex++)

			{

			err = CreateScreenDevice(modeList[modeIndex],(CFbsBitGc::TGraphicsOrientation)orientation);

			}

		if (err == KErrNotSupported)

			{

			// Orientation not supported, try next one

			continue;

			}

		TInt j;

		//The source bitmap data

		TUint8 srcBmpData[100];

		for(j=0;j<100;j++)

			{

			srcBmpData[j] = 0xAA;

			}

		//The alpha bitmap data

		TUint8 alphaBmpData[20];

		for(j=0;j<20;j++)

			{

			alphaBmpData[j] = TUint8(j);

			}

		//Source bitmap

		srcBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(srcBmp);

		User::LeaveIfError(srcBmp->Create(TSize(100, 1), EColor256));

		TPtr8 p1(srcBmpData, 100, 100);

		srcBmp->SetScanLine(p1, 0);

		//Alpha bitmap

		alphaBmp = new (ELeave) CFbsBitmap;

		CleanupStack::PushL(alphaBmp);

		User::LeaveIfError(alphaBmp->Create(TSize(20, 1), EGray256));

		TPtr8 p2(alphaBmpData, 20, 20);

		alphaBmp->SetScanLine(p2, 0);

		//Do BitBltMasked()

		iGc->BitBltMasked(TPoint(20, 20), srcBmp, TRect(10, 0, 100, 1), alphaBmp, EFalse);

		iDevice->Update();

		iGc->SetOrientation(CFbsBitGc::EGraphicsOrientationNormal);

		//

		CleanupStack::PopAndDestroy(alphaBmp);

		CleanupStack::PopAndDestroy(srcBmp);

		}

	}

TUint32 AlphaBlend(TUint32 aDestPixel, TUint32 aSrcPixel, TUint8 aMask)

 	{

 	TUint32 dr = (aDestPixel & 0x00FF0000) >> 16;

 	TUint32 dg = (aDestPixel & 0x0000FF00) >> 8;

 	TUint32 db = aDestPixel & 0x000000FF;

 	TUint32 sr = (aSrcPixel & 0x00FF0000) >> 16;

 	TUint32 sg = (aSrcPixel & 0x0000FF00) >> 8;

 	TUint32 sb = aSrcPixel & 0x000000FF;

 	TUint32 rr = (aMask * sr)/255 + ((0xFF - aMask) * dr)/255;

 	TUint32 rg = (aMask * sg)/255 + ((0xFF - aMask) * dg)/255;

 	TUint32 rb = (aMask * sb)/255 + ((0xFF - aMask) * db)/255;

 	return(rr << 16 | rg << 8 | rb | 0xff000000);

 	}

inline TUint32 OptimizedBlend32(TInt aPrimaryRed,TInt aPrimaryGreen,TInt aPrimaryBlue,TUint32 aSecondary,TUint8 aAlphaValue)

 	{

  	if(aAlphaValue == 0xff)

 		{

 		return (aPrimaryBlue + (aPrimaryGreen<<8) + (aPrimaryRed<<16)) | 0xff000000;

  		}

  	else

  		{

  		const TUint32 alphaValue = (aAlphaValue << 8) + aAlphaValue;

  		const TInt r2 = (aSecondary & 0x00ff0000) >> 16;

  		const TInt g2 = (aSecondary & 0x0000ff00) >> 8;

  		const TInt b2 = aSecondary & 0x000000ff;

  		const TInt r3 = ((alphaValue * (aPrimaryRed   - r2)) >> 16) + r2;

 		const TInt g3 = ((alphaValue * (aPrimaryGreen - g2)) >> 16) + g2;

 		const TInt b3 = ((alphaValue * (aPrimaryBlue  - b2)) >> 16) + b2;

 		return (b3 & 0xFF) | ((g3<<8) & 0xFF00) | ((r3<<16) & 0xFF0000) | 0xFF000000;

  		}

  	}

/**

  @SYMTestCaseID GRAPHICS-BITGDI-0085

  @SYMDEF             

  @SYMTestCaseDesc 

  @SYMTestPriority High

  @SYMTestStatus Implemented

  @SYMTestActions 

  @SYMTestExpectedResults 

*/  	

// This tests the correctness of the results of alpha-blending with EColor16MA

void CTAlphaBlending::TestAlphaBlendCorrect(TDisplayMode /* aScreenMode */, TDisplayMode /* aBitmapMode */)

 	{

 	// test data

 	TUint32 top = 0xFFCCEE55;

 	TUint32 beneath = 0xFFEEAA66;

 	TUint8 alpha = 0xF0;

 	TInt maxDiff = 0;

 	for(TInt i = 0; i < 100000; i++)

 		{

 		top = Math::Random();

 		beneath = Math::Random();

 		alpha = Math::Random();

 		TUint32 res1 = AlphaBlend(beneath, top, alpha);

 		TUint32 res2 = OptimizedBlend32((top >> 16) & 0xFF,(top >>8) & 0xFF,(top & 0xFF),beneath, alpha);

 		if(res1 != res2)

 			{

 			TInt diff = 0;

 			TInt diff1 = res1 & 0xFF;

 			TInt diff2 = res2 & 0xFF;

 			diff = diff1 - diff2;

 			if(diff < 0)

 				diff*=-1;