C++ CFbsBitmap::DataAddress方法代码示例

void tst_QVolatileImage::sharing()
{
    QVolatileImage img1(100, 100, QImage::Format_ARGB32);
    QVolatileImage img2 = img1;
    img1.beginDataAccess();
    img2.beginDataAccess();
    QVERIFY(img1.constBits() == img2.constBits());
    img2.endDataAccess();
    img1.endDataAccess();
    img1.imageRef(); // non-const call, should detach
    img1.beginDataAccess();
    img2.beginDataAccess();
    QVERIFY(img1.constBits() != img2.constBits());
    img2.endDataAccess();
    img1.endDataAccess();

    // toImage() should return a copy of the internal QImage.
    // imageRef() is a reference to the internal QImage.
    QVERIFY(img1.imageRef().constBits() != img1.toImage().constBits());

#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(100, 50), EColor16MAP) == KErrNone);
    QVolatileImage bmpimg(bmp);
    QVolatileImage bmpimg2;
    bmpimg2 = bmpimg;
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    QCOMPARE(bmpimg2.constBits(), (const uchar *) bmp->DataAddress());
    // Now force a detach, which should copy the pixel data under-the-hood.
    bmpimg.imageRef();
    QVERIFY(bmpimg.constBits() != (const uchar *) bmp->DataAddress());
    QCOMPARE(bmpimg2.constBits(), (const uchar *) bmp->DataAddress());
    delete bmp;
#endif
}

void AConvolute64KBlurGauss( CFbsBitmap& aTarget,
                             const CFbsBitmap& aSource,
                             const TInt aBlendFactor )
    {
    TInt width  = aTarget.SizeInPixels().iWidth;
    TInt height = aTarget.SizeInPixels().iHeight;

    // CFbsBitmap::ScanLineLength returns bytes 
    TInt targetScanW  = CFbsBitmap::ScanLineLength(
                                aTarget.SizeInPixels().iWidth,
                                aTarget.DisplayMode());
    TInt sourceScanW  = CFbsBitmap::ScanLineLength(
                                aSource.SizeInPixels().iWidth,
                                aSource.DisplayMode());

    TInt combinedScanW = (targetScanW << 16) + sourceScanW;

    // Prepare the data addresses
    aTarget.LockHeap( ETrue ); // Lock the global bitmap heap
    TUint* targetAddr = reinterpret_cast<TUint*>( aTarget.DataAddress() );
    TUint* sourceAddr = reinterpret_cast<TUint*>( aSource.DataAddress() );

    ADoConvolute64KBlurGauss(targetAddr, sourceAddr, combinedScanW, width, height, aBlendFactor);

    aTarget.UnlockHeap( ETrue ); // Unlock the global bitmap heap
    }

    //------------------------------------------------------------------------
    static void ProcessRgbToRgb( const CFbsBitmap& aTarget,
                                 const CFbsBitmap& aSource,
                                 const TInt aTreshold,
                                 const TInt aBlendFactor )
        {
        // ScanLineLength returns bytes, but width must match the Type
        TInt width  = CFbsBitmap::ScanLineLength( aSource.SizeInPixels().iWidth,
                                                  aSource.DisplayMode() ) / sizeof(Type);
        TInt height = aSource.SizeInPixels().iHeight;

        TInt pixelCount = width * height;
        TInt shade;
        TInt r,g,b;

        aTarget.LockHeap( ETrue ); // Lock the global bitmap heap
        Type* dataT = reinterpret_cast<Type*>( aTarget.DataAddress() );
        Type* dataS = reinterpret_cast<Type*>( aSource.DataAddress() );

        for( TInt index = 0; index < pixelCount; ++index )
            {
            r = AknsRlRgb<Type,X,R,G,B>::R8(*dataS);
            g = AknsRlRgb<Type,X,R,G,B>::G8(*dataS);
            b = AknsRlRgb<Type,X,R,G,B>::B8(*dataS);

            // Pixel intensity = grayscale value
            shade = AknsRlUtil::Grayscale( TUint8(r), TUint8(g), TUint8(b) );

            // Convert to B&W
            if( shade < aTreshold )
                shade = 0;
            else
                shade = 255;

            // Exposure blending
            // Note: It is assumed that arithmetic shifting is supported
            // -> negative values are shifted correctly
            r = (shade * aBlendFactor + (255 - aBlendFactor) * r) >> 8;
            g = (shade * aBlendFactor + (255 - aBlendFactor) * g) >> 8;
            b = (shade * aBlendFactor + (255 - aBlendFactor) * b) >> 8;

            if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
            if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
            if( b < 0 ) b = 0; else if( b > 255 ) b = 255;

            AknsRlRgb<Type,X,R,G,B>::SetRgb8( dataT, TUint8(r), TUint8(g), TUint8(b) );

            dataT++;
            dataS++;
            }

        aTarget.UnlockHeap( ETrue ); // Unlock the global bitmap heap
        }

    //------------------------------------------------------------------------
    static void ProcessRgbToGray( const CFbsBitmap& aTarget,
                                  const CFbsBitmap& aSource,
                                  const TInt aTreshold )
        {
        TInt width  = aSource.SizeInPixels().iWidth;
        TInt height = aSource.SizeInPixels().iHeight;

        // ScanLineLength returns bytes, but width must match the Type
        TInt scanT = CFbsBitmap::ScanLineLength(width, aTarget.DisplayMode());
        TInt scanS = CFbsBitmap::ScanLineLength(width, aSource.DisplayMode()) / sizeof(Type);

        TInt shade;

        TInt pitchT = scanT - width;
        TInt pitchS = scanS - width;

        aTarget.LockHeap( ETrue ); // Lock the global bitmap heap
        TUint8* dataT = reinterpret_cast<TUint8*>( aTarget.DataAddress() );
        Type* dataS = reinterpret_cast<Type*>( aSource.DataAddress() );

        TInt x, y;
        for( y=0; y < height; y++ )
            {
            for( x=0; x < width; x++ )
                {
                // Pixel intensity = grayscale value
                shade = AknsRlUtil::Grayscale( AknsRlRgb<Type,X,R,G,B>::R8(*dataS),
                                               AknsRlRgb<Type,X,R,G,B>::G8(*dataS),
                                               AknsRlRgb<Type,X,R,G,B>::B8(*dataS) );

                // Convert to B&W
                if( shade < aTreshold )
                    *dataT = 0;
                else
                    *dataT = 255;

                dataT++;
                dataS++;
                }

            dataT = dataT + pitchT;
            dataS = dataS + pitchS;
            }

        aTarget.UnlockHeap( ETrue ); // Unlock the global bitmap heap
        }

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);	
	}

void tst_QVolatileImage::ensureFormat()
{
    QImage source(12, 23, QImage::Format_ARGB32_Premultiplied);
    QVolatileImage img(source);
    QVERIFY(!img.isNull());
    QVERIFY(img.imageRef() == source);
    QVERIFY(img.toImage() == source);

    QVERIFY(img.ensureFormat(QImage::Format_ARGB32_Premultiplied)); // no-op
    QVERIFY(img.imageRef() == source);
    QVERIFY(img.toImage() == source);
    QVERIFY(img.format() == QImage::Format_ARGB32_Premultiplied);

    QVERIFY(img.ensureFormat(QImage::Format_RGB32)); // new data under-the-hood
    QVERIFY(img.imageRef() != source);
    QVERIFY(img.toImage() != source);
    QVERIFY(img.format() == QImage::Format_RGB32);

#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(100, 50), EColor16MAP) == KErrNone);
    QVolatileImage bmpimg(bmp);
    QVERIFY(bmpimg.ensureFormat(QImage::Format_ARGB32_Premultiplied)); // no-op
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());

    // A different format should cause data copying.
    QVERIFY(bmpimg.ensureFormat(QImage::Format_RGB32));
    QVERIFY(bmpimg.constBits() != (const uchar *) bmp->DataAddress());
    const uchar *prevBits = bmpimg.constBits();

    QVERIFY(bmpimg.ensureFormat(QImage::Format_RGB16));
    QVERIFY(bmpimg.constBits() != (const uchar *) bmp->DataAddress());
    QVERIFY(bmpimg.constBits() != prevBits);
    prevBits = bmpimg.constBits();

    QVERIFY(bmpimg.ensureFormat(QImage::Format_MonoLSB));
    QVERIFY(bmpimg.constBits() != (const uchar *) bmp->DataAddress());
    QVERIFY(bmpimg.constBits() != prevBits);

    delete bmp;
#endif
}

/**
@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();
	}

    //------------------------------------------------------------------------
    static void ProcessGrayToRgb( const CFbsBitmap& aTarget,
                                  const CFbsBitmap& aSource,
                                  const TInt aTreshold )
        {
        TInt width  = aSource.SizeInPixels().iWidth;
        TInt height = aSource.SizeInPixels().iHeight;

        // ScanLineLength returns bytes, but width must match the Type
        TInt scanT = CFbsBitmap::ScanLineLength(width, aTarget.DisplayMode()) / sizeof(Type);
        TInt scanS = CFbsBitmap::ScanLineLength(width, aSource.DisplayMode());

        TInt pitchT = scanT - width;
        TInt pitchS = scanS - width;

        aTarget.LockHeap( ETrue ); // Lock the global bitmap heap
        Type* dataT = reinterpret_cast<Type*>( aTarget.DataAddress() );
        TUint8* dataS = reinterpret_cast<TUint8*>( aSource.DataAddress() );

        TInt x, y;
        for( y=0; y < height; y++ )
            {
            for( x=0; x < width; x++ )
                {
                // Convert to B&W
                if( *dataS < aTreshold )
                    AknsRlRgb<Type,X,R,G,B>::SetRgb8( dataT, TUint8(0), TUint8(0), TUint8(0) );
                else
                    AknsRlRgb<Type,X,R,G,B>::SetRgb8( dataT, TUint8(255), TUint8(255), TUint8(255) );

                dataT++;
                dataS++;
                }

            dataT = dataT + pitchT;
            dataS = dataS + pitchS;
            }

        aTarget.UnlockHeap( ETrue ); // Unlock the global bitmap heap
        }

/**
@SYMTestCaseID
GRAPHICS-UI-BENCH-0157

@SYMPREQ PREQ39

@SYMREQ REQ9236 
@SYMREQ REQ9237

@SYMTestCaseDesc
Measure the performance of BitBlt() for the current screen mode and for various bitmap pixel formats,
with a bitmap that is accessed by the CPU via DataAddresss(), and is therefore never cached by DirectGDI.

@SYMTestActions
Create a copy of a test bitmap.
Call DataAddress() on the bitmap.
Draw an entire bitmap using BitBlt(), with no overlapping or clipping. 
Measure the time taken.

@SYMTestExpectedResults
The performance to be logged as a pixel rate, per bitmap.
*/
void CTBitBltPerfDirectGdi::BitBltCpuAccessL()
	{
	INFO_PRINTF1(_L("CTBitBltPerfDirectGdi::BitBltCpuAccess"));
	
	_LIT(KTestName, "DirectGdiBitBltCpuAccess");

	for (TInt source = 0; source < iBitmapImage.Count(); ++source)
		{
		CFbsBitmap* bitmapBitBltImage = CopyIntoNewBitmapL(iBitmapImage[source], iBitmapImage[source]->DisplayMode());
		TESTL(bitmapBitBltImage != NULL);
		CleanupStack::PushL(bitmapBitBltImage);
		bitmapBitBltImage->DataAddress();	// CPU Access so that it is not cached by DirectGDI.
		BitBltBitmapTestL(EBitBlt, bitmapBitBltImage, NULL, KCropTo, KTestName, iContext);
		CleanupStack::PopAndDestroy(1, bitmapBitBltImage);		
		}
	}

TInt CScreenCaptureUtil::CopySurfaceToBitmapL(CFbsBitmap& aCopyToBitmap)
	{
	RSurfaceManager::TInfoBuf infoBuf;
	RSurfaceManager::TSurfaceInfoV01& info = infoBuf();

	User::LeaveIfError(iSurfaceManager.SurfaceInfo(iLocalSurface, infoBuf));
	
	TInt bytesPerPixel=0;
	TDisplayMode	bitmapMode = ENone;
	
	switch (info.iPixelFormat)
		{
		case EUidPixelFormatXRGB_8888:
			{
			bitmapMode = EColor16MU;
			bytesPerPixel = 4;
			break;
			}
		default:
			{
			return KErrCorrupt;
			}
		}
	
	if ((aCopyToBitmap.SizeInPixels() != info.iSize) || (aCopyToBitmap.DisplayMode() != bitmapMode))
		{
		return KErrCorrupt;
		}
	
	RChunk chunk;
	CleanupClosePushL(chunk);
	User::LeaveIfError(iSurfaceManager.MapSurface(iLocalSurface, chunk));
	TUint8* surfacePtr = chunk.Base();
	TUint8* bitmapPtr = (TUint8*)aCopyToBitmap.DataAddress();
	TInt copyBytes=info.iSize.iWidth*bytesPerPixel;
	for (TInt y=0; y<info.iSize.iHeight; y++)
		{
		Mem::Copy(bitmapPtr,surfacePtr,copyBytes);
		surfacePtr += info.iStride;
		bitmapPtr += aCopyToBitmap.DataStride();
		}
	CleanupStack::PopAndDestroy(&chunk);
	return KErrNone;
	}

void tst_QVolatileImage::create()
{
    QVolatileImage nullImg;
    QVERIFY(nullImg.isNull());

    QVolatileImage img(100, 200, QImage::Format_ARGB32);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 100);
    QCOMPARE(img.height(), 200);
    QCOMPARE(img.format(), QImage::Format_ARGB32);
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.depth(), 32);

    QImage source(12, 23, QImage::Format_ARGB32_Premultiplied);
    img = QVolatileImage(source);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 12);
    QCOMPARE(img.height(), 23);
    QCOMPARE(img.format(), source.format());
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QVERIFY(img.imageRef() == source);
    QVERIFY(img.toImage() == source);
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.hasAlphaChannel(), img.imageRef().hasAlphaChannel());
    QCOMPARE(img.hasAlphaChannel(), img.toImage().hasAlphaChannel());
    QCOMPARE(img.depth(), 32);

#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(100, 50), EColor16MAP) == KErrNone);
    QVolatileImage bmpimg(bmp);
    QVERIFY(!bmpimg.isNull());
    QCOMPARE(bmpimg.width(), 100);
    QCOMPARE(bmpimg.height(), 50);
    // Verify that we only did handle duplication, not pixel data copying.
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    delete bmp;
    // Check if content is still valid.
    QImage copyimg = bmpimg.toImage();
    QCOMPARE(copyimg.format(), QImage::Format_ARGB32_Premultiplied);
#endif
}

/**
@SYMTestCaseID GRAPHICS-EGL-0130

@SYMTestPriority 1

@SYMPREQ 39

@SYMREQ See SGL.GT0386.401 document

@SYMTestCaseDesc
When a RSgImage is used as both the source and target of a draw operation, then the operation should not panic.
However the outcome is undefined.

@SYMTestActions
Create and fully construct an RSgImage object
Pass the RSgImage objects 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 those calls to eglCreateImageKHR() do NOT return EGL_NO_IMAGE_KHR
Use vgCreateEGLImageTargetKHR() to construct a VGImage object from the just created EGLImage.
•	Check for errors
Create Pixmap Surface from the previous RSgImage and make it current in a way that is compatible as a target for the VGImage to be drawn to.
•	Set the iUsage bit to ESgUsageBitOpenVgSurface and ESgUsageBitOpenGlesSurface
Use OpenVG to draw a single patern to the left half of the VGImage created from the EGLImage.
Try to draw this VGImage to the right half of the pixmap surface currently linked to the context.
Call eglWaitClient() to finish the above drawing instructions synchronously.
Check that the pixmap contains expected pixel values.
Pass the VGImage into vgDestroyImage()
Pass the EGLImage into eglDestroyImageKHR()
Close the RSgImage
Destroy the pixmap
Check for memory and handle leaks

@SYMTestExpectedResults
This test is not supposed to panic.
The contents, though, are undefined since we are reading from and writing to the same memory
No memory or handle leaks.
*/
TVerdict CEglTest_EGL_Image_Self_Drawing::doTestStepL()
	{
	SetTestStepID(_L("GRAPHICS-EGL-0130"));
	INFO_PRINTF1(_L("CEglTest_EGL_Image_Self_Drawing::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();
		}

	// This test is performed for default pixel format
	PrintUsedPixelConfiguration();

	// Create display object
	GetDisplayL();
	CreateEglSessionL();
	iEglSess->InitializeL();
	iEglSess->OpenSgDriverL();

	// Create a reference bitmap which we use to init the SgImage (we use index=8)
	TDisplayMode bitmapMode = EglTestConversion::PixelFormatToDisplayMode(iSourceFormat);
	CFbsBitmap* bitmap = iEglSess->CreateReferenceBitmapL(bitmapMode, KPixmapSize, 8);
	CleanupStack::PushL(bitmap);

	INFO_PRINTF1(_L("Creating one RSgImage"));
	TSgImageInfoTest imageInfo;
	imageInfo.iSizeInPixels = KPixmapSize;
	imageInfo.iPixelFormat = iSourceFormat;
#ifdef SYMBIAN_GRAPHICS_EGL_SGIMAGELITE
	imageInfo.iUsage = ESgUsageBitOpenVgImage | ESgUsageBitOpenVgSurface;
#else
	imageInfo.iUsage = ESgUsageOpenVgImage | ESgUsageOpenVgTarget;
#endif //SYMBIAN_GRAPHICS_EGL_SGIMAGELITE
	RSgImage sgImage;
	CleanupClosePushL(sgImage);
	ASSERT_EQUALS(sgImage.Create(imageInfo, bitmap->DataAddress(),bitmap->DataStride()), KErrNone);

	INFO_PRINTF1(_L("Creating one EGLImage from it"));
	EGLImageKHR imageKHR = iEglSess->eglCreateImageKhrL(iDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, &sgImage, KEglImageAttribsPreservedTrue);
	ASSERT_EGL_TRUE(imageKHR != EGL_NO_IMAGE_KHR);

	INFO_PRINTF1(_L("Calling eglBindAPI(EGL_OPENVG_API)"));
	ASSERT_EGL_TRUE(eglBindAPI(EGL_OPENVG_API));

    EGLint numConfigsWithPre = 0;
    EGLConfig configWithPre;
    const EGLint KAttribImagePre[] = { EGL_MATCH_NATIVE_PIXMAP,  reinterpret_cast<EGLint>(&sgImage),
                                       EGL_RENDERABLE_TYPE,      EGL_OPENVG_BIT,
                                       EGL_SURFACE_TYPE,         EGL_PIXMAP_BIT | EGL_VG_ALPHA_FORMAT_PRE_BIT,
                                       EGL_NONE };
    ASSERT_EGL_TRUE(eglChooseConfig(iDisplay, KAttribImagePre, &configWithPre, 1, &numConfigsWithPre));

	// Create a pixmap surface from the native image
	INFO_PRINTF1(_L("Calling eglCreatePixmapSurface"));
	EGLSurface surface = eglCreatePixmapSurface(iDisplay, configWithPre, &sgImage, KPixmapAttribsVgAlphaFormatPre );
	ASSERT_EGL_TRUE(surface != EGL_NO_SURFACE);

//.........这里部分代码省略.........

void* QVGPixmapData::toNativeType(NativeType type)
{
    if (type == QPixmapData::SgImage) {
#if defined(QT_SYMBIAN_SUPPORTS_SGIMAGE) && !defined(QT_NO_EGL)
        toVGImage();

        if (!isValid() || vgImage == VG_INVALID_HANDLE)
            return 0;

        TInt err = 0;

        RSgDriver driver;
        err = driver.Open();
        if (err != KErrNone)
            return 0;

        TSgImageInfo sgInfo;
        sgInfo.iPixelFormat = EUidPixelFormatARGB_8888_PRE;
        sgInfo.iSizeInPixels.SetSize(w, h);
        sgInfo.iUsage = ESgUsageBitOpenVgImage | ESgUsageBitOpenVgSurface;

        RSgImage *sgImage = q_check_ptr(new RSgImage());
        err = sgImage->Create(sgInfo, NULL, NULL);
        if (err != KErrNone) {
            driver.Close();
            return 0;
        }

        pfnVgCreateEGLImageTargetKHR vgCreateEGLImageTargetKHR = (pfnVgCreateEGLImageTargetKHR) eglGetProcAddress("vgCreateEGLImageTargetKHR");

        if (eglGetError() != EGL_SUCCESS || !(QEgl::hasExtension("EGL_KHR_image") || QEgl::hasExtension("EGL_KHR_image_pixmap")) || !vgCreateEGLImageTargetKHR) {
            driver.Close();
            return 0;
        }

        const EGLint KEglImageAttribs[] = {EGL_IMAGE_PRESERVED_SYMBIAN, EGL_TRUE, EGL_NONE};
        EGLImageKHR eglImage = QEgl::eglCreateImageKHR(QEgl::display(),
                EGL_NO_CONTEXT,
                EGL_NATIVE_PIXMAP_KHR,
                (EGLClientBuffer)sgImage,
                (EGLint*)KEglImageAttribs);
        if (eglGetError() != EGL_SUCCESS) {
            sgImage->Close();
            driver.Close();
            return 0;
        }

        VGImage dstVgImage = vgCreateEGLImageTargetKHR(eglImage);
        if (vgGetError() != VG_NO_ERROR) {
            QEgl::eglDestroyImageKHR(QEgl::display(), eglImage);
            sgImage->Close();
            driver.Close();
            return 0;
        }

        vgCopyImage(dstVgImage, 0, 0,
                vgImage, 0, 0,
                w, h, VG_FALSE);

        if (vgGetError() != VG_NO_ERROR) {
            sgImage->Close();
            sgImage = 0;
        }
        // release stuff
        vgDestroyImage(dstVgImage);
        QEgl::eglDestroyImageKHR(QEgl::display(), eglImage);
        driver.Close();
        return reinterpret_cast<void*>(sgImage);
#endif
    } else if (type == QPixmapData::FbsBitmap) {
        CFbsBitmap *bitmap = q_check_ptr(new CFbsBitmap);

        if (bitmap) {
            if (bitmap->Create(TSize(source.width(), source.height()),
                              EColor16MAP) == KErrNone) {
                const uchar *sptr = source.constBits();
                bitmap->BeginDataAccess();

                uchar *dptr = (uchar*)bitmap->DataAddress();
                Mem::Copy(dptr, sptr, source.byteCount());

                bitmap->EndDataAccess();
            } else {
                delete bitmap;
                bitmap = 0;
            }
        }

        return reinterpret_cast<void*>(bitmap);
    }
    return 0;
}

//.........这里部分代码省略.........
            cleanup();
            driver.Close();
            return;
        }

        TSgImageInfo sgImageInfo;
        err = sgImage->GetInfo(sgImageInfo);
        if (err != KErrNone) {
            cleanup();
            driver.Close();
            return;
        }

        pfnVgCreateEGLImageTargetKHR vgCreateEGLImageTargetKHR = (pfnVgCreateEGLImageTargetKHR) eglGetProcAddress("vgCreateEGLImageTargetKHR");

        if (eglGetError() != EGL_SUCCESS || !(QEgl::hasExtension("EGL_KHR_image") || QEgl::hasExtension("EGL_KHR_image_pixmap")) || !vgCreateEGLImageTargetKHR) {
            cleanup();
            driver.Close();
            return;
        }

        const EGLint KEglImageAttribs[] = {EGL_IMAGE_PRESERVED_SYMBIAN, EGL_TRUE, EGL_NONE};
        EGLImageKHR eglImage = QEgl::eglCreateImageKHR(QEgl::display(),
                EGL_NO_CONTEXT,
                EGL_NATIVE_PIXMAP_KHR,
                (EGLClientBuffer)sgImage,
                (EGLint*)KEglImageAttribs);

        if (eglGetError() != EGL_SUCCESS) {
            cleanup();
            driver.Close();
            return;
        }

        vgImage = vgCreateEGLImageTargetKHR(eglImage);
        if (vgGetError() != VG_NO_ERROR) {
            cleanup();
            QEgl::eglDestroyImageKHR(QEgl::display(), eglImage);
            driver.Close();
            return;
        }

        w = sgImageInfo.iSizeInPixels.iWidth;
        h = sgImageInfo.iSizeInPixels.iHeight;
        d = 32; // We always use ARGB_Premultiplied for VG pixmaps.
        is_null = (w <= 0 || h <= 0);
        source = QImage();
        recreate = false;
        prevSize = QSize(w, h);
        setSerialNumber(++qt_vg_pixmap_serial);
        // release stuff
        QEgl::eglDestroyImageKHR(QEgl::display(), eglImage);
        driver.Close();
#endif
    } else if (type == QPixmapData::FbsBitmap) {
        CFbsBitmap *bitmap = reinterpret_cast<CFbsBitmap*>(pixmap);

        bool deleteSourceBitmap = false;

#ifdef Q_SYMBIAN_HAS_EXTENDED_BITMAP_TYPE

        // Rasterize extended bitmaps

        TUid extendedBitmapType = bitmap->ExtendedBitmapType();
        if (extendedBitmapType != KNullUid) {
            bitmap = createBlitCopy(bitmap);
            deleteSourceBitmap = true;
        }
#endif

        if (bitmap->IsCompressedInRAM()) {
            bitmap = createBlitCopy(bitmap);
            deleteSourceBitmap = true;
        }

        TDisplayMode displayMode = bitmap->DisplayMode();
        QImage::Format format = qt_TDisplayMode2Format(displayMode);

        TSize size = bitmap->SizeInPixels();

        bitmap->BeginDataAccess();
        uchar *bytes = (uchar*)bitmap->DataAddress();
        QImage img = QImage(bytes, size.iWidth, size.iHeight, format);
        img = img.copy();
        bitmap->EndDataAccess();

        if(displayMode == EGray2) {
            //Symbian thinks set pixels are white/transparent, Qt thinks they are foreground/solid
            //So invert mono bitmaps so that masks work correctly.
            img.invertPixels();
        } else if(displayMode == EColor16M) {
            img = img.rgbSwapped(); // EColor16M is BGR
        }

        fromImage(img, Qt::AutoColor);

        if(deleteSourceBitmap)
            delete bitmap;
    }
}

void tst_QVolatileImage::bitmap()
{
#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(100, 50), EColor64K) == KErrNone);
    QVolatileImage bmpimg(bmp);
    CFbsBitmap *dupbmp = static_cast<CFbsBitmap *>(bmpimg.duplicateNativeImage());
    QVERIFY(dupbmp);
    QVERIFY(dupbmp != bmp);
    QCOMPARE(dupbmp->DataAddress(), bmp->DataAddress());
    delete dupbmp;
    delete bmp;
    bmpimg.beginDataAccess();
    qMemSet(bmpimg.bits(), 0, bmpimg.byteCount());
    qMemSet(bmpimg.bits(), 1, bmpimg.bytesPerLine() * bmpimg.height());
    bmpimg.endDataAccess();

    // Test bgr->rgb conversion in case of EColor16M.
    bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(101, 89), EColor16M) == KErrNone);
    bmp->BeginDataAccess();
    TUint32 *addr = bmp->DataAddress();
    uint rgb = QColor(10, 20, 30).rgb();
    qMemCopy(bmp->DataAddress(), &rgb, 3);
    bmp->EndDataAccess();
    TRgb symrgb;
    bmp->GetPixel(symrgb, TPoint(0, 0));
    QVERIFY(symrgb.Red() == 10 && symrgb.Green() == 20 && symrgb.Blue() == 30);
    bmpimg = QVolatileImage(bmp);
    QVERIFY(bmpimg.toImage().pixel(0, 0) == rgb);
    // check if there really was a conversion
    bmp->BeginDataAccess();
    bmpimg.beginDataAccess();
    qMemCopy(&rgb, bmpimg.constBits(), 3);
    uint rgb2 = rgb;
    qMemCopy(&rgb2, bmp->DataAddress(), 3);
    QVERIFY(rgb != rgb2);
    bmpimg.endDataAccess(true);
    bmp->EndDataAccess(true);
    delete bmp;

    bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(101, 89), EGray2) == KErrNone);
    bmpimg = QVolatileImage(bmp); // inverts pixels, but should do it in place
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    QCOMPARE(bmpimg.format(), QImage::Format_MonoLSB);
    bmpimg.ensureFormat(QImage::Format_ARGB32_Premultiplied);
    QVERIFY(bmpimg.constBits() != (const uchar *) bmp->DataAddress());
    QCOMPARE(bmpimg.format(), QImage::Format_ARGB32_Premultiplied);
    delete bmp;

    // The following two formats must be optimal always.
    bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(101, 89), EColor16MAP) == KErrNone);
    bmpimg = QVolatileImage(bmp);
    QCOMPARE(bmpimg.format(), QImage::Format_ARGB32_Premultiplied);
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    bmpimg.ensureFormat(QImage::Format_ARGB32_Premultiplied);
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    delete bmp;
    bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(101, 89), EColor16MU) == KErrNone);
    bmpimg = QVolatileImage(bmp);
    QCOMPARE(bmpimg.format(), QImage::Format_RGB32);
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    bmpimg.ensureFormat(QImage::Format_RGB32);
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    delete bmp;

#else
    QSKIP("CFbsBitmap is only available on Symbian, skipping bitmap test", SkipSingle);
#endif
}