// Copyright (c) 2007-2009 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:

//

/**

 @file

 @test

*/

#include <test/tefunit.h> // for ASSERT macros

#include "egltest_image_multithread.h"

#include <test/egltestcommonconversion.h>

#include <test/egltestcommonsgimageinfo.h>

CEglTest_MThread_Image_Base::CEglTest_MThread_Image_Base()

	{

	}

CEglTest_MThread_Image_Base::~CEglTest_MThread_Image_Base()

	{

	iSgImageShared.Close();

	}

/**

@SYMTestCaseID GRAPHICS-EGL-0155

@SYMTestPriority 1

@SYMPREQ 39

@SYMREQ See SGL.GT0386.401 document

@SYMTestCaseDesc

Check if EGL Implementation allows two threads to work in parallel.

@SYMTestActions

Run two threads that independently perform the same actions detailed below.

This test will check for the “VG_KHR_EGL_image” extension, if it is not 

supported on this platform then the test will return immediately without failure.

Create and fully construct an RSgImage object

•	Set the iUsage bits to ESgUsageBitOpenVgImage

Pass the RSgImage object into eglCreateImageKHR() with

•	The target parameter set to EGL_NATIVE_PIXMAP_KHR

•	Use the current display and EGL_NO_CONTEXT

•	Use a NULL attr_list

Check that eglCreateImageKHR() does NOT return EGL_NO_IMAGE_KHR

Use vgCreateEGLImageTargetKHR() to construct a VGImage object from the EGLImage.

•	Check for errors (VGInvalidHandle is not returned)

Create a second RSgImage, and use it to create a pixmap surface that is 

compatible as a target for the VGImage to be drawn to.

•	Set the iUsage bit to ESgUsageBitOpenVgSurface

•	Use the same pixel format as the RSgImage above.

Now that a eglContext and an OpenVG context have been created, use the 

OpenVG API vgClearImage to clear to a chosen colour the VGImage previously 

returned by eglCreateImageKHR.

Use OpenVG to draw the just drawn VGImage to the pixmap surface currently 

linked to the context.

Call eglWaitClient() to finish the above drawing instructions synchronously.

Destroy the original image data

•	Pass the VGImage into vgDestroyImage()

•	Pass the EGLImage into eglDestroyImageKHR()

•	Close the first RSgImage

•	Check that the pixmap surface contains expected pixel values using 

OpenVG APIs, vgReadPixels.

Close the second RSgImage and destroy the pixmap surface

Check for memory and handle leaks

@SYMTestExpectedResults

Pixmap surface has the expected contents in both threads (within tolerance).

No memory or handle leaks.

*/

TVerdict CEglTest_EGL_Image_Multi_Thread_Parallel::doTestStepL()

	{

	SetTestStepID(_L("GRAPHICS-EGL-0155"));

	INFO_PRINTF1(_L("Enter: CEglTest_EGL_Image_Multi_Thread_Parallel::doTestStepL"));

	TBool ret = CheckForExtensionL(KEGL_RSgimage | KEGL_KHR_image_base | KEGL_KHR_image_pixmap | KVG_KHR_EGL_image);

	if(!ret)

		{

		// The extension is not supported

		RecordTestResultL();

		CloseTMSGraphicsStep();

		return TestStepResult();

		}

	Test_MultiThreadL(2, ETrue);

	TerminateDisplayL();

	INFO_PRINTF1(_L("Exit: CEglTest_EGL_Image_Multi_Thread_Parallel::doTestStepL"));

	RecordTestResultL();	

	CloseTMSGraphicsStep();

	return TestStepResult();

	}

void CEglTest_EGL_Image_Multi_Thread_Parallel::doThreadFunctionL(TInt aIdx)

	{

	INFO_PRINTF2(_L("CEglTest_EGL_Image_Multi_Thread_Parallel::doThreadFunctionL, Thread %d"),aIdx);

	GetDisplayL();

	CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, aIdx);

	eglSess->InitializeL();	

	eglSess->OpenSgDriverL();

	// create a reference bitmap (we give index 7, as there's only 1 image in this test case)

	TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

	CFbsBitmap* bitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 7);

	CleanupStack::PushL(bitmap);

	// Create an RSgImage

	INFO_PRINTF2(_L("Thread %d, Creating a RSgImage having the reference bitmap's content"),aIdx);

	TSgImageInfoOpenVgImage imageInfo = TSgImageInfoOpenVgImage(KDefaultSourceFormat, KPixmapSize);

    RSgImage rSgImageLocal;

	CleanupClosePushL(rSgImageLocal);

	ASSERT_EQUALS(rSgImageLocal.Create(imageInfo,bitmap->DataAddress(),bitmap->DataStride()), KErrNone);

	INFO_PRINTF2(_L("Thread %d, Creating an EGLImage from the shared RSgImage"),aIdx);

	EGLImageKHR eglImageLocal = eglSess->eglCreateImageKhrL(iDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, &rSgImageLocal, KEglImageAttribsPreservedTrue);

	ASSERT_EGL_TRUE(eglImageLocal != EGL_NO_IMAGE_KHR);

	CleanupStack::PopAndDestroy(&rSgImageLocal); 	//transferring ownership of the buffer to the EGLImage

	CleanupStack::PopAndDestroy(bitmap);

	INFO_PRINTF2(_L("Thread %d, Creating a Surface and a Context bound to OpenVG"),aIdx);

	TUidPixelFormat pixelFormat = EglTestConversion::VgFormatToSgPixelFormat(KDefaultSurfaceFormat);

	TSgImageInfoOpenVgTarget imageInfo2 = TSgImageInfoOpenVgTarget(pixelFormat, KPixmapSize);

	// Create a pixmap surface matching the native image pixel format

	eglSess->CreatePixmapSurfaceAndMakeCurrentAndMatchL(imageInfo2,CTestEglSession::EResourceCloseSgImageEarly);

	INFO_PRINTF2(_L("Thread %d, Creating one VGImage from the EGLImage"),aIdx);

	VGImage vgImageLocal = eglSess->vgCreateImageTargetKHR((VGeglImageKHR)eglImageLocal);	

	ASSERT_VG_TRUE(vgImageLocal != VG_INVALID_HANDLE);

	ASSERT_EGL_TRUE(eglSess->DestroyEGLImage(iDisplay, eglImageLocal));

	// Copy the source VGImage to the surface

	vgSetPixels(0, 0, vgImageLocal, 0, 0, KPixmapSize.iWidth, KPixmapSize.iHeight);

	ASSERT_TRUE(vgGetError()==VG_NO_ERROR);

	eglWaitClient();

	// destroy VGImage

	vgDestroyImage(vgImageLocal);

	ASSERT_TRUE(vgGetError()==VG_NO_ERROR);

	// we can now compare the VgImage to the one we would expect for this particular thread

	CFbsBitmap* refBitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 7);

	CleanupStack::PushL(refBitmap);

	eglSess->CheckVgDrawingL(KDefaultSurfaceFormat, refBitmap);

	CleanupStack::PopAndDestroy(refBitmap);

	INFO_PRINTF2(_L("Drawing successful, Thread %d"),aIdx);

	// cleanup

	eglSess->CloseSgDriver();

  	CleanupStack::PopAndDestroy(eglSess);	

	}

/**

@SYMTestCaseID GRAPHICS-EGL-0156

@SYMTestPriority 1

@SYMPREQ 39

@SYMREQ See SGL.GT0386.401 document

@SYMTestCaseDesc

Check if EGL Implementation allows two threads to work in parallel.

EGLImage can’t be created from an RSgImage that already has been linked to an EGLImage by another thread.

@SYMTestActions

Main Thread: creates an RSgImage and starts thread1 and thread2.

Thread1: Creates an EGLImage from the RSgImage previous mentioned

--------

Thread2: Creates an EGLImage from the RSgImage previous mentioned and check that eglCreateImageKHR() does return EGL_NO_IMAGE_KHR

--------

Thread1: Closes the EGLImage

Main Thread: Closes the RSgImage.

@SYMTestExpectedResults

eglCreateImageKHR() does return EGL_NO_IMAGE_KHR in the 2nd thread and EGL_BAD_ACCESS error is generated.

No memory or handle leaks

*/

TVerdict CEglTest_EGL_Image_Multi_Thread_Sibling_Basic::doTestStepL()

	{

	SetTestStepID(_L("GRAPHICS-EGL-0156"));

	INFO_PRINTF1(_L("Enter: CEglTest_EGL_Image_Multi_Thread_Sibling_Basic::doTestStepL"));

	TBool ret = CheckForExtensionL(KEGL_RSgimage | KEGL_KHR_image_base | KEGL_KHR_image_pixmap | KVG_KHR_EGL_image);

	if(!ret)

		{

		// The extension is not supported

		RecordTestResultL();

		CloseTMSGraphicsStep();

		return TestStepResult();

		}

	// Create display object

	ASSERT_TRUE(iDisplay == EGL_NO_DISPLAY);

    GetDisplayL();

    CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, 0);

	eglSess->InitializeL();

	// Make sure the driver is ready

	eglSess->OpenSgDriverL();

	// create a reference bitmap (we give index 0, as there's only 1 image in this test case)

	TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

	CFbsBitmap* bitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 0);

	CleanupStack::PushL(bitmap);

	// Create an RSgImage (member variable as it is 'shared' in the thread funtion...) 

	TSgImageInfoOpenVgImage imageInfo = TSgImageInfoOpenVgImage(KDefaultSourceFormat, KPixmapSize);

	ASSERT_EQUALS(iSgImageShared.Create(imageInfo,bitmap->DataAddress(),bitmap->DataStride()), KErrNone);

	CleanupStack::PopAndDestroy(bitmap);

	// launch 2 threads

	Test_MultiThreadL(2, ETrue);

	// clean everything

	iSgImageShared.Close();

	CleanupStack::PopAndDestroy(eglSess);

	TerminateDisplayL();

	INFO_PRINTF1(_L("Exit: CEglTest_EGL_Image_Multi_Thread_Sibling_Basic::doTestStepL"));

	RecordTestResultL();

	CloseTMSGraphicsStep();

	return TestStepResult();

	}

void CEglTest_EGL_Image_Multi_Thread_Sibling_Basic::doThreadFunctionL(TInt aIdx)

	{

	INFO_PRINTF2(_L("CEglTest_EGL_Image_Multi_Thread_Sibling_Basic::doThreadFunctionL, Thread %d"),aIdx);

	CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, aIdx);

	eglSess->InitializeL();

	eglSess->OpenSgDriverL();

	EGLImageKHR eglImageLocal = EGL_NO_IMAGE_KHR;

	if(aIdx == 0)

		{

		INFO_PRINTF2(_L("Thread %d, Creating an EGLImage from the shared RSgImage"),aIdx);

		eglImageLocal = eglSess->eglCreateImageKhrL(iDisplay,EGL_NO_CONTEXT,EGL_NATIVE_PIXMAP_KHR,&iSgImageShared,KEglImageAttribsPreservedTrue);

		ASSERT_EGL_TRUE(eglImageLocal != EGL_NO_IMAGE_KHR);

		}

	Rendezvous(aIdx);

	if(aIdx == 1)

		{

		INFO_PRINTF2(_L("Thread %d, Creating an EGLImage from the shared RSgImage"),aIdx);

		eglImageLocal = eglSess->eglCreateImageKhrL(iDisplay,EGL_NO_CONTEXT,EGL_NATIVE_PIXMAP_KHR,&iSgImageShared,KEglImageAttribsPreservedTrue);

		ASSERT_EGL_TRUE(eglImageLocal == EGL_NO_IMAGE_KHR);

		ASSERT_EGL_ERROR(EGL_BAD_ACCESS);

		}

	Rendezvous(aIdx);

	// cleanup

	if(aIdx == 0)

		{

		ASSERT_EGL_TRUE(eglSess->DestroyEGLImage(iDisplay, eglImageLocal));

		}

	eglSess->CloseSgDriver();

	CleanupStack::PopAndDestroy(eglSess);

	}

/**

@SYMTestCaseID GRAPHICS-EGL-0157

@SYMTestPriority 1

@SYMPREQ 39

@SYMREQ See SGL.GT0386.401 document

@SYMTestCaseDesc

Check if EGL Implementation allows two threads to work in parallel.

Each thread is allowed to create a VGImage from the same EGLImage

@SYMTestActions

Main Thread: creates an RSgImage with the same content as the reference bitmap and creates an EGLImage from it; starts thread1 and thread2.

Thread1: Creates an egl context and a pixmap surface linked to it. Creates an VGImage from the EGLImage previous mentioned

Thread2: Creates an egl context and a pixmap surface linked to it. Creates an VGImage from the EGLImage previous mentioned

--------

Thread 1: Changes the content of the RSgImage by using the VGImage that has a reference to it.

--------

Thread1: Passes the VGImage into vgDestroyImage()

Thread2: Copies the VGImage to the pixmap surface and checks the contents

Thread2: Passes the VGImage into vgDestroyImage()

Main Thread: Closes the EGLImage

Main Thread: Closes the RSgImage

@SYMTestExpectedResults

No error is generated within both threads. The changes apported by the first thread affects the second thread. The content the pixmap surface will matches the one of the reference bitmap changed by the first thread.

No memory or handle leaks

*/

TVerdict CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage::doTestStepL()

	{

	SetTestStepID(_L("GRAPHICS-EGL-0157"));

	INFO_PRINTF1(_L("Enter: CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage::doTestStepL"));

	TBool ret = CheckForExtensionL(KEGL_RSgimage | KEGL_KHR_image_base | KEGL_KHR_image_pixmap | KVG_KHR_EGL_image);

	if(!ret)

		{

		// The extension is not supported

		RecordTestResultL();

		CloseTMSGraphicsStep();

		return TestStepResult();

		}

	// Create display object

	ASSERT_TRUE(iDisplay == EGL_NO_DISPLAY);

    GetDisplayL();

    CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, 0);

	eglSess->InitializeL();

	// Make sure the driver is ready

	eglSess->OpenSgDriverL();

	// create a reference bitmap (we give index 3, as there's only 1 image in this test case)

	TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

	CFbsBitmap* bitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 3);

	CleanupStack::PushL(bitmap);

	// Create an RSgImage (member variable as it is 'shared' in the thread funtion...) 

	INFO_PRINTF1(_L("Parent Thread, Creating the shared RSgImage"));

	TSgImageInfoOpenVgImage imageInfo = TSgImageInfoOpenVgImage(KDefaultSourceFormat, KPixmapSize);

	ASSERT_EQUALS(iSgImageShared.Create(imageInfo,bitmap->DataAddress(),bitmap->DataStride()), KErrNone);

	CleanupStack::PopAndDestroy(bitmap);

	// Create an EGLImage from the RSgImage (member variable as it is 'shared' in the thread funtion...) 

	INFO_PRINTF1(_L("Parent Thread, Creating the shared EGLImage"));

	iEGLImageShared = eglSess->eglCreateImageKhrL(iDisplay,EGL_NO_CONTEXT,EGL_NATIVE_PIXMAP_KHR,&iSgImageShared,KEglImageAttribsPreservedTrue);

	ASSERT_EGL_TRUE(iEGLImageShared != EGL_NO_IMAGE_KHR);

	iSgImageShared.Close();

	// launch 2 threads

	Test_MultiThreadL(2, ETrue);

	// cleanup

	ASSERT_EGL_TRUE(eglSess->DestroyEGLImage(iDisplay, iEGLImageShared));

	CleanupStack::PopAndDestroy(eglSess);

	TerminateDisplayL();	

	INFO_PRINTF1(_L("Exit: CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage::doTestStepL"));	

	RecordTestResultL();

	CloseTMSGraphicsStep();

	return TestStepResult();

	}

void CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage::doThreadFunctionL(TInt aIdx)

	{	

	INFO_PRINTF2(_L("CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage::doThreadFunctionL, Thread %d"),aIdx);

	CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, aIdx);

	eglSess->InitializeL();

	eglSess->OpenSgDriverL();

	INFO_PRINTF2(_L("Thread %d, Creating a Surface and a Context bound to OpenVG"),aIdx);

	TUidPixelFormat pixelFormat = EglTestConversion::VgFormatToSgPixelFormat(KDefaultSurfaceFormat);

	TSgImageInfoOpenVgTarget imageInfo = TSgImageInfoOpenVgTarget(pixelFormat, KPixmapSize);

	// Create a pixmap surface matching the native image pixel format

	eglSess->CreatePixmapSurfaceAndMakeCurrentAndMatchL(imageInfo,CTestEglSession::EResourceCloseSgImageEarly);

	// Create a VGImage from the EGLImage

	INFO_PRINTF2(_L("Thread %d, Creating one VGImage from the shared EGLImage"),aIdx);

	VGImage vgImageLocal = eglSess->vgCreateImageTargetKHR((VGeglImageKHR)iEGLImageShared);	

	ASSERT_VG_TRUE(vgImageLocal != VG_INVALID_HANDLE);

	Rendezvous(aIdx);

	if(aIdx == 0)

		{

		INFO_PRINTF2(_L("Thread %d, Updating contents of the VGImage from the shared EGLImage"),aIdx);

		TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

		CFbsBitmap* bitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 8);

    	// Add pixel data to the VGImage reference from the bitmap reference. 

        // Mind the fact that CFbsBitmap and VGImages use different coordinates origin!

		TSize bitmapSize = bitmap->SizeInPixels();

    	TUint8* address = reinterpret_cast<TUint8*>(bitmap->DataAddress());

    	TInt stride = bitmap->DataStride();

    	address += (bitmapSize.iHeight - 1) * stride;

        vgImageSubData(vgImageLocal, address, -stride, KDefaultSurfaceFormat, 0,0, bitmapSize.iWidth, bitmapSize.iHeight);

		delete bitmap;

        bitmap = NULL;

		ASSERT_TRUE(vgGetError()==VG_NO_ERROR);

		eglWaitClient();

		}

	Rendezvous(aIdx);

	if(aIdx == 1)

		{

		INFO_PRINTF2(_L("Thread %d, Drawing the VGImage to the current surface"),aIdx);

		// Copy the source VGImage to the surface

    	vgSetPixels(0, 0, vgImageLocal, 0, 0, KPixmapSize.iWidth, KPixmapSize.iHeight);

		ASSERT_TRUE(vgGetError()==VG_NO_ERROR);

		eglWaitClient();

		// we can now compare the VgImage to the one we expect after changing it in the other thread

		TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

		CFbsBitmap* refBitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 8);

		CleanupStack::PushL(refBitmap);

		eglSess->CheckVgDrawingL(KDefaultSurfaceFormat, refBitmap);

		CleanupStack::PopAndDestroy(refBitmap);

		INFO_PRINTF2(_L("Thread %d, Drawing successful"),aIdx);

		}		

	// cleanup

	vgDestroyImage(vgImageLocal);

	ASSERT_TRUE(vgGetError() == VG_NO_ERROR);

	eglSess->CloseSgDriver();

	CleanupStack::PopAndDestroy(eglSess);

	}

/**

@SYMTestCaseID GRAPHICS-EGL-0158

@SYMTestPriority 1

@SYMPREQ 39

@SYMREQ See SGL.GT0386.401 document

@SYMTestCaseDesc

Check if EGL Implementation allows two threads to work in parallel.

Each thread is allowed to create a VGImage from an EGLImage created by another thread.

@SYMTestActions

Main Thread: creates an RSgImage ; starts thread1 and thread2.

Thread1: Creates an EGLImage from the previous mentioned RSgImage

--------

Thread2: Creates an VGImage from the EGLImage created by the other thread

--------

Thread1: Passes the EGLImage into eglDestroyImageKHR ()

Thread2: Passes the VGImage into vgDestroyImage()

Main Thread: Closes the RSgImage

@SYMTestExpectedResults

No error is generated within both threads

No memory or handle leaks

*/

TVerdict CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage_PassingEGLImage::doTestStepL()

	{

	SetTestStepID(_L("GRAPHICS-EGL-0158"));

	INFO_PRINTF1(_L("Enter: CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage_PassingEGLImage::doTestStepL"));

	TBool ret = CheckForExtensionL(KEGL_RSgimage | KEGL_KHR_image_base | KEGL_KHR_image_pixmap | KVG_KHR_EGL_image);

	if(!ret)

		{

		// The extension is not supported

		RecordTestResultL();

		CloseTMSGraphicsStep();

		return TestStepResult();

		}

	// Create display object

	ASSERT_TRUE(iDisplay == EGL_NO_DISPLAY);

    GetDisplayL();

    CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, 0);

	eglSess->InitializeL();

	// Make sure the driver is ready

	eglSess->OpenSgDriverL();

	// create a reference bitmap (we give index 5, as there's only 1 image in this test case)

	TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(KDefaultSourceFormat);

	CFbsBitmap* bitmap = eglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 5);

	CleanupStack::PushL(bitmap);

	// Create an RSgImage (member variable as it is 'shared' in the thread funtion...) 

	INFO_PRINTF1(_L("Parent Thread, Creating the shared RSgImage"));

	TSgImageInfoOpenVgImage imageInfo = TSgImageInfoOpenVgImage(KDefaultSourceFormat, KPixmapSize);

	ASSERT_EQUALS(iSgImageShared.Create(imageInfo,bitmap->DataAddress(),bitmap->DataStride()), KErrNone);

	CleanupStack::PopAndDestroy(bitmap);

	// launch 2 threads

	Test_MultiThreadL(2, ETrue);

	// cleanup

	iSgImageShared.Close();

	CleanupStack::PopAndDestroy(eglSess);

	TerminateDisplayL();	

	INFO_PRINTF1(_L("Exit: CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage_PassingEGLImage::doTestStepL"));	

	RecordTestResultL();

	CloseTMSGraphicsStep();

	return TestStepResult();

	}

void CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage_PassingEGLImage::doThreadFunctionL(TInt aIdx)

	{	

	INFO_PRINTF2(_L("CEglTest_EGL_Image_Multi_Thread_Sibling_VGImage_PassingEGLImage::doThreadFunctionL, Thread %d"),aIdx);

	CTestEglSession* eglSess = CTestEglSession::NewLC(Logger(), iDisplay, aIdx);

	eglSess->InitializeL();

	eglSess->OpenSgDriverL();	

	// check there is no eglImage at the start of either thread

	ASSERT_EGL_TRUE(iEGLImageShared == EGL_NO_IMAGE_KHR);

	// Wait for both thread to reach this point

	//	This is important for multicore platforms (i.e., naviengine) as the execution order is not known and it could

	//	happen that the first thread has already created the image before the second checks there is no eglImage 

	Rendezvous(aIdx);

	if(aIdx == 0)

		{

		// Create an EGLImage from the RSgImage (member variable as it is 'shared' in the thread function...) 

		INFO_PRINTF2(_L("Thread %d, Creating the shared EGLImage"),aIdx);

		iEGLImageShared = eglSess->eglCreateImageKhrL(iDisplay,EGL_NO_CONTEXT,EGL_NATIVE_PIXMAP_KHR,&iSgImageShared,KEglImageAttribsPreservedTrue);

		ASSERT_EGL_TRUE(iEGLImageShared != EGL_NO_IMAGE_KHR);

		iSgImageShared.Close();

		}

	Rendezvous(aIdx);

	if(aIdx == 1)

		{

		INFO_PRINTF2(_L("Thread %d, Creating a Surface and a Context bound to OpenVG"),aIdx);

		TUidPixelFormat pixelFormat = EglTestConversion::VgFormatToSgPixelFormat(KDefaultSurfaceFormat);

		TSgImageInfoOpenVgTarget imageInfo = TSgImageInfoOpenVgTarget(pixelFormat, KPixmapSize);

		// Create a pixmap surface matching the native image pixel format

		eglSess->CreatePixmapSurfaceAndMakeCurrentAndMatchL(imageInfo,CTestEglSession::EResourceCloseSgImageEarly);