C++ CFbsBitmapDevice类代码示例

void CMMABitmapWindow::SetDestinationBitmapL(CFbsBitmap* aBitmap)
{
    CFbsBitmap* bitmap = new(ELeave)CFbsBitmap();
    CleanupStack::PushL(bitmap);
    User::LeaveIfError(bitmap->Duplicate(aBitmap->Handle()));

    // create context for bitmap
    CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(aBitmap);
    CleanupStack::PushL(bitmapDevice);


    CGraphicsContext* bitmapContext = NULL;
    User::LeaveIfError(bitmapDevice->CreateContext(bitmapContext));

    CleanupStack::Pop(bitmapDevice);   // bitmapDevice
    CleanupStack::Pop(bitmap);   // bitmap

    delete iBitmap;
    iBitmap = bitmap;
    delete iBitmapDevice;
    iBitmapDevice = bitmapDevice;
    delete iBitmapContext;
    iBitmapContext = bitmapContext;

    if (iDrawRect.IsEmpty())
    {
        iDrawRect.SetSize(iBitmap->SizeInPixels());
    }
}

/**
Copy a bitmap into another bitmap (generally in a different displaymode)
tiles destination bitmap with source
*/
void CTe_graphicsperformanceSuiteStepBase::CopyBitmapL(CFbsBitmap* aDst, CFbsBitmap* aSrc)
	{
	TSize srcSize = aSrc->SizeInPixels();
	TSize dstSize = aDst->SizeInPixels();
	CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL(aDst);
	CleanupStack::PushL(dev);
	CFbsBitGc* gc = NULL;
	if ( 0 == dev->CreateContext(gc) )
		{
		CleanupStack::PushL(gc);
		TPoint point;
		gc->SetBrushColor(TRANSPARENT_BLACK);
		gc->SetBrushStyle(CGraphicsContext::ENullBrush);
		gc->SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);
		gc->Clear();
		gc->SetDrawMode(CGraphicsContext::EDrawModePEN);
		for(point.iY=0; point.iY<dstSize.iHeight; point.iY+=srcSize.iHeight)
			{
			for(point.iX=0; point.iX<dstSize.iWidth; point.iX+=srcSize.iWidth)
				{
				gc->BitBlt(point, aSrc);
				}
			}
		CleanupStack::PopAndDestroy(gc);
		}
	CleanupStack::PopAndDestroy(dev);
	}

void CSliderControl::LoadPicture()
	{
	
	CFbsBitmap* BitMap = new (ELeave) CFbsBitmap();
	BitMap->Create(Size(),EColor16M);
	CAknsBasicBackgroundControlContext* iContext = 
			CAknsBasicBackgroundControlContext::NewL(KAknsIIDQsnBgAreaMain,Rect(),ETrue);
	CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(BitMap);
	CBitmapContext* bitGc = NULL;
	bitmapDevice->CreateBitmapContext(bitGc);
	///
	CleanupStack::PushL(iContext);
	CleanupStack::PushL(bitmapDevice);
	CleanupStack::PushL(bitGc);
	AknsDrawUtils::DrawBackground(AknsUtils::SkinInstance(),iContext,NULL,*bitGc,TPoint(0,0),Rect(),0);
	CleanupStack::PopAndDestroy(3);
	iIcon=BitMap;
	
	/*
	CFbsBitmap* mask;
	CFbsBitmap* icon;
	_LIT(KPath,"\\resource\\apps\\TweakS_ui.mif");
	AknIconUtils::CreateIconL(icon,mask,KPath,EMbmTweaks_uiButton_dlg_bg,EMbmTweaks_uiButton_dlg_bg_mask);
	AknIconUtils::SetSize(icon,Size(),EAspectRatioNotPreserved);
	AknIconUtils::SetSize(mask,Size(),EAspectRatioNotPreserved);
	iIcon=CGulIcon::NewL(icon,mask);
	*/
	}

/**
Create a checked board
@param aPixelFormat The pixel format for create the target bitmap
@param aSize The size of the bitmap
@param aChecksPerAxis Number of checks on X and Y.
 */
CFbsBitmap* CTe_graphicsperformanceSuiteStepBase::CreateCheckedBoardL(TDisplayMode aDisplayMode, TSize aSize, TSize aChecksPerAxis) const
	{
	
	CFbsBitmap* bitmap = new (ELeave) CFbsBitmap;
	CleanupStack::PushL(bitmap);
	bitmap->Create(aSize, aDisplayMode);
	
	CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(bitmap);
	CleanupStack::PushL(bitmapDevice);
	
	CFbsBitGc* bitGc = NULL;
	User::LeaveIfError(bitmapDevice->CreateContext(bitGc));
	CleanupStack::PushL(bitGc);
	
	bitGc->Clear();
	bitGc->SetBrushStyle(CGraphicsContext::ESolidBrush);
	bitGc->SetPenStyle(CGraphicsContext::ENullPen);
	TPoint point(0,0);
	const TSize checkerSize((TReal)aSize.iWidth/aChecksPerAxis.iWidth,(TReal)aSize.iHeight/aChecksPerAxis.iHeight);
	TInt brushColour = 0;
	for(point.iY = 0; point.iY < aSize.iHeight; point.iY += checkerSize.iHeight)
		{
		for(point.iX = 0; point.iX < aSize.iWidth; point.iX += checkerSize.iWidth)
			{
			bitGc->SetBrushColor(KColor16Table[brushColour++ & 0x0F]);
			TRect rect(point, checkerSize);
			bitGc->DrawRect(rect);
			}
		}
	
	CleanupStack::PopAndDestroy(2, bitmapDevice);
	CleanupStack::Pop(bitmap);
	
	return bitmap;
	}

/**
Draws a stretched bitmap with or without a mask.

@param aUseMask set to ETrue to use a alpha mask. Normally used for 16MU display modes that do not store the alpha.
@param aSrcMode is the source display mode
@param aDstMode is the destination display mode
@param aSession is the windows server session
@param aWindow is a reference to the window
@param aGc is the graphics context of the window
@param aNumIterations is the number of iterations to run the test
*/
void CAlphaBlendTest::DoDrawBitmapL(TBool aUseMask, TDisplayMode aSrcMode, TDisplayMode aDstMode, RWsSession& aSession, RWindow& aWindow, CWindowGc* aGc, TInt aNumIterations)
	{		
	const TSize bitmapSize = aWindow.Size();
	
	// Construct target bitmap.
	CFbsBitmap* bitmapTarget = CreateSoftwareBitmapLC(bitmapSize, aDstMode);
	CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(bitmapTarget);
	CleanupStack::PushL(bitmapDevice);
	
	// Construct GC.
	CFbsBitGc* bitmapGc = NULL;
	User::LeaveIfError(bitmapDevice->CreateContext(bitmapGc));
	CleanupStack::PushL(bitmapGc);
	
	// Construct source bitmap.	
	TSize smallerSize(bitmapSize.iWidth/2,  bitmapSize.iHeight/2);
	CFbsBitmap* source = CreateSoftwareBitmapLC(smallerSize, aSrcMode);
	VerticalGradientAlphaL(source, TRgb(0x00000000), TRgb(0xffffffff));	
	CFbsBitmap* sourceAlpha = CreateSoftwareBitmapLC(smallerSize, EGray256);	// match size to src
	VerticalGradientAlphaL(sourceAlpha, TRgb(0x01010101), TRgb(0xfefefefe));
		
	bitmapGc->SetBrushStyle(CGraphicsContext::ENullBrush);
	bitmapGc->SetBrushColor(TRANSPARENT_BLACK);
	bitmapGc->Clear();
	bitmapGc->SetDrawMode(CGraphicsContext::EDrawModePEN);
	aGc->Activate(aWindow);
	TPoint point(0,0);
	bitmapGc->BitBlt(point, bitmapTarget);
	aGc->Deactivate();
	aSession.Flush();

	TBuf <20> testName;
	if (!aUseMask)
		{
		testName=_L("DrawBitmap");
		iProfiler->InitResults();
		for(int i=0; i<aNumIterations; i++)
			{
			bitmapGc->DrawBitmap(TRect(point, bitmapSize), source);
			iProfiler->MarkResultSetL();
			}
		}
	else
		{
		testName=_L("DrawBitmapMasked");
		iProfiler->InitResults();
		for(int i=0; i<aNumIterations; i++)
			{
			bitmapGc->DrawBitmapMasked(TRect(point, bitmapSize), source,TRect(point, smallerSize), sourceAlpha, EFalse);
			iProfiler->MarkResultSetL();
			}
		}
	INFO_PRINTF4(_L("%S(Stretched) with src = %S, dst = %S"), &testName, &ColorModeName(aSrcMode), &ColorModeName(aDstMode));
	iProfiler->ResultsAnalysis(testName, 0, aSrcMode, aDstMode, aNumIterations);
	// copy up to screen for sanity check
	BitBlt(aSession, aWindow, aGc, *bitmapTarget);
	CleanupStack::PopAndDestroy(5, bitmapTarget);
	}

CFbsBitmap* AknBitmapMirrorUtils::CreateBitmapL(CFbsBitmap* aSourceBitmap, TInt aMirrorDirection)
    {
    User::LeaveIfNull(aSourceBitmap);
    CFbsBitmap* destinationBitmap = new (ELeave) CFbsBitmap();
    CleanupStack::PushL(destinationBitmap);   

    TSize sourceBitmapSize = aSourceBitmap->SizeInPixels();            
    TRect sourceRect = TRect(TPoint(0,0), sourceBitmapSize);
    TSize destinationBitmapSize(sourceRect.Width(), sourceRect.Height()); 

    User::LeaveIfError(destinationBitmap->Create(destinationBitmapSize, aSourceBitmap->DisplayMode()));

    CFbsBitmapDevice* destinationDevice = CFbsBitmapDevice::NewL( destinationBitmap );
    CleanupStack::PushL(destinationDevice);

    CFbsBitGc* destinationGc;
    User::LeaveIfError( destinationDevice->CreateContext( destinationGc ) );

    switch (aMirrorDirection)
        {
        case EAknVerticalMirroring:
            {
            TRect sourceBitmapBlittingRect( sourceRect.iTl.iX,sourceRect.iTl.iY,sourceRect.iBr.iX,sourceRect.iTl.iY + 1 );  
            for ( TInt yPos=destinationBitmapSize.iHeight-1; yPos >= 0; yPos-- )
                {
                destinationGc->BitBlt( TPoint(0,yPos), aSourceBitmap, sourceBitmapBlittingRect );
                sourceBitmapBlittingRect.iTl.iY++;
                sourceBitmapBlittingRect.iBr.iY++;
                }
            break;
            }

        case EAknHorizontalMirroring:
            {
            TRect sourceBitmapBlittingRect( sourceRect.iTl.iX,sourceRect.iTl.iY,sourceRect.iTl.iX + 1,sourceRect.iBr.iY );      
            for ( TInt xPos=destinationBitmapSize.iWidth-1; xPos >= 0; xPos-- )
                {
                destinationGc->BitBlt( TPoint(xPos,0), aSourceBitmap, sourceBitmapBlittingRect );
                sourceBitmapBlittingRect.iTl.iX++;
                sourceBitmapBlittingRect.iBr.iX++;
                }
            break;
            }

        default:
            {
            destinationGc->BitBlt( TPoint(0,0), aSourceBitmap, sourceRect );
            break;
            }
        }

    delete destinationGc;  
    CleanupStack::Pop(2); // destinationBitmap, destinationDevice
    delete destinationDevice;

    return destinationBitmap;   
    }

/** Allocates and constructs the device with the bitmap. Also creates a 2D graphics 
accelerator which is owned and used by the device.

@param aFbsBitmap A pointer to the font and bitmap server managed bitmap.
@leave KErrArgument The bitmap's handle is zero.
@leave KErrAccessDenied The bitmap is in the ROM.
@return A pointer to the newly constructed device.
@panic EBitgdiPanicInvalidBitmap aFbsBitmap is NULL. */
EXPORT_C CFbsBitmapDevice* CFbsBitmapDevice::NewL(CFbsBitmap* aFbsBitmap)
	{
	BG_ASSERT_ALWAYS(aFbsBitmap != NULL,EBitgdiPanicInvalidBitmap);

	CFbsBitmapDevice* self = new(ELeave) CFbsBitmapDevice;
	CleanupStack::PushL(self);
	self->ConstructL(aFbsBitmap);
	CleanupStack::Pop(); // self
	return self;
	}

void CTap2MenuAppUi::CopyBitmapL(CFbsBitmap *aSource, CFbsBitmap *aTarget)
	{
	if(aSource != NULL && aTarget != NULL)
		{
		if(aSource->SizeInPixels() != aTarget->SizeInPixels() || aSource->DisplayMode() != aTarget->DisplayMode())
			{User::Leave(KErrArgument);}
		CFbsBitmapDevice* device = CFbsBitmapDevice::NewL(aTarget);
		CleanupStack::PushL(device);
		CFbsBitGc* gc = NULL;
		User::LeaveIfError(device->CreateContext(gc));
		CleanupStack::PushL(gc);
		gc->BitBlt(TPoint(0, 0), aSource);
		CleanupStack::PopAndDestroy(gc);
		CleanupStack::PopAndDestroy(device);
		}
	}

void tst_NativeImageHandleProvider::bitmap()
{
#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_OPENVG)
    QPixmap tmp(10, 20);
    if (tmp.pixmapData()->classId() == QPixmapData::OpenVGClass) {
        BitmapProvider prov;

        // This should fail because of null ptr.
        QPixmap pm = pixmapFromNativeImageHandleProvider(&prov);
        QVERIFY(pm.isNull());
        pm = QPixmap();
        QCOMPARE(prov.refCount, 0);

        prov.bmp = new CFbsBitmap;
        QCOMPARE(prov.bmp->Create(TSize(prov.w, prov.h), EColor16MAP), KErrNone);
        CFbsBitmapDevice *bitmapDevice = CFbsBitmapDevice::NewL(prov.bmp);
        CBitmapContext *bitmapContext = 0;
        QCOMPARE(bitmapDevice->CreateBitmapContext(bitmapContext), KErrNone);
        TRgb symbianColor = TRgb(255, 200, 100);
        bitmapContext->SetBrushColor(symbianColor);
        bitmapContext->Clear();
        delete bitmapContext;
        delete bitmapDevice;

        pm = pixmapFromNativeImageHandleProvider(&prov);
        QVERIFY(!pm.isNull());
        QCOMPARE(pm.width(), prov.w);
        QCOMPARE(pm.height(), prov.h);
        QVERIFY(prov.refCount == 1);
        QImage img = pm.toImage();
        QVERIFY(prov.refCount == 1);
        QRgb pix = img.pixel(QPoint(1, 2));
        QCOMPARE(qRed(pix), symbianColor.Red());
        QCOMPARE(qGreen(pix), symbianColor.Green());
        QCOMPARE(qBlue(pix), symbianColor.Blue());

        pm = QPixmap(); // should result in calling release
        QCOMPARE(prov.refCount, 0);
        delete prov.bmp;
    } else {
         QSKIP("Not openvg", SkipSingle);
    }
#else
    QSKIP("Not applicable", SkipSingle);
#endif
}

void CTestCamSnapshot::DoStartSnapshotL()
	{
	CFbsBitmap* snapshot = new(ELeave) CFbsBitmap;
	CleanupStack::PushL(snapshot);
	User::LeaveIfError(snapshot->Create(iSnapshotImageRect.Size(), iSnapshotImage->DisplayMode()));
	CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL(snapshot);
	CleanupStack::PushL(dev);
	CFbsBitGc* gc = NULL;
	User::LeaveIfError(dev->CreateContext(gc));
	CleanupStack::Pop(dev);
	CleanupStack::Pop(snapshot);
	
	iSnapshot = snapshot;
	iSnapshotDev = dev;
	iSnapshotGc = gc;
		
	iSnapshotActive = ETrue;
	}

// ============================================================================
// CIconConverter::DoProcessMaskL()
// process the bitmap mask
//
// @since 3.1
// ============================================================================
void CIconConverter::DoProcessMaskL()
    {
    // we use white to mean transparent at this stage, simply for efficiency
    // since all the canvases we will copy in to begin as white

    if ( iOriginalBitmapMask->Handle() == 0 )
        {
        // Create a mask that shows the whole bitmap as an icon
        // (all black)
        User::LeaveIfError( iOriginalBitmapMask->Create(
            iOriginalBitmap->SizeInPixels(), EGray2 ) );
        CFbsBitmapDevice* device =
            CFbsBitmapDevice::NewL( iOriginalBitmapMask );
        CleanupStack::PushL( device );

        CFbsBitGc* gc;
        User::LeaveIfError( device->CreateContext( gc ) );
        gc->SetBrushStyle( CGraphicsContext::ESolidBrush );
        gc->SetDrawMode( CGraphicsContext::EDrawModePEN );
        gc->SetBrushColor( KRgbBlack );
        // Create a big black image
        gc->Clear();
        delete gc;
        CleanupStack::PopAndDestroy( device );
        }
    else
        {
        // Invert the mask obtained from the PNG
        CFbsBitmapDevice* device =
            CFbsBitmapDevice::NewL( iOriginalBitmapMask );
        CleanupStack::PushL(device);
        CFbsBitGc* gc;
        User::LeaveIfError( device->CreateContext( gc ) );
        gc->SetDrawMode( CGraphicsContext::EDrawModeNOTSCREEN );
        gc->Clear();
        delete gc;
        CleanupStack::PopAndDestroy( device );
        }

    // Scale the icon to the sizes required
    iCurrentSizeIndex = 0;
    DoIconScalingL();
    }

// ============================================================================
// CIconConverter::DoIconStoreL()
// Store icon and mask files
//
// @since 3.1
// ============================================================================
void CIconConverter::DoIconStoreL()
    {
    // Store the icon and its mask in temporary files until we are ready
    // to create the final icon

    // Icon is stored at index n, mask at index n+1
    TInt iconIndex = iCurrentSizeIndex * 2;
    TFileName iconFile = *iTempPath;
    GetTempIconName( iconIndex++, iconFile );

    TFileName maskFile = *iTempPath;
    GetTempIconName( iconIndex, maskFile );

    // invert the masks before saving

    CFbsBitmapDevice* device = CFbsBitmapDevice::NewL( iTempBitmapMask );
    CleanupStack::PushL( device );

    CFbsBitGc* gc;
    User::LeaveIfError( device->CreateContext( gc ) );
    gc->SetDrawMode( CGraphicsContext::EDrawModeNOTSCREEN );
    gc->Clear();

    delete gc;
    CleanupStack::PopAndDestroy( device );

    // save the bitmaps
    User::LeaveIfError( iTempBitmap->Save( iconFile ) );
    User::LeaveIfError( iTempBitmapMask->Save( maskFile ) );

    if ( ++iCurrentSizeIndex < iIconSizes->Count() )
        {
        // do the next icon size
        DoIconScalingL();
        }
    else
        {
        DoCreateFinalIconL();
        }

    }

//-----------------------------------------------------------------------------
//  CBrowserViewImagesListBox::CreateIconL(
//                                      CFbsBitmap* aBitmap, TBool aShrinkIt )
//-----------------------------------------------------------------------------
//
CGulIcon* CBrowserViewImagesListBox::CreateIconL(
                                        CFbsBitmap* aBitmap, TBool aShrinkIt)
    {
    CGulIcon* icon = NULL;

    // create icon
    if(aShrinkIt)
        {
        CFbsBitmap* bmp = new(ELeave)CFbsBitmap;
        CleanupStack::PushL(bmp);
        User::LeaveIfError(bmp->Create(TSize(42,32), EColor16M));
    
        // create bitmap device
        CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL(bmp);
        CleanupStack::PushL(dev);
    
        // create graphics context for bitmap device
        CGraphicsContext* ctx = NULL;
        User::LeaveIfError( dev->CreateContext(ctx) );
        CleanupStack::PushL(ctx);
    
        // calculate aspect ratio
        TSize targetSize = Fit(aBitmap->SizeInPixels(), bmp->SizeInPixels());
        // copy bitmap to temporary bitmap
        ctx->DrawBitmap(TRect(TPoint(0,0), targetSize), aBitmap, TRect(TPoint(0,0), aBitmap->SizeInPixels()));

        CleanupStack::PopAndDestroy(2);   // ctx, dev

        icon = CGulIcon::NewL(bmp); // bmp is owned, no mask used
        CleanupStack::Pop();  // bmp
        delete aBitmap;
        } 
    else 
        {
        icon = CGulIcon::NewL(aBitmap); // bitmap is owned, no mask used
        }

    return icon;
    }

/*
 * Landmark objects will make use of an SVG file for rendering (demo purposes)
 */
void CLMXObject::ConstructL()
{
    _LIT(KIconFile, "\\resource\\apps\\Landmarks_0x2002E1AF.mif");

    CGulIcon* icon = CreateIconL(KIconFile, EMbmLandmarks_0x2002e1afIcon, EMbmLandmarks_0x2002e1afIcon_mask);
    CleanupStack::PushL(icon);

    CFbsBitmap* bitmap = icon->Bitmap();    // Ownership NOT transferred
    CFbsBitmap* mask   = icon->Mask();      // Ownership NOT transferred

    // Always expect 16M bitmap to make conversion to GL_RGBA easier 
    if (bitmap->DisplayMode() != EColor16M)
    {
        bitmap = new(ELeave) CFbsBitmap;
        CleanupStack::PushL(bitmap);

        User::LeaveIfError(bitmap->Create(icon->Bitmap()->SizeInPixels(), EColor16M));

        CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(bitmap);
        CleanupStack::PushL(bitmapDevice);

        CFbsBitGc* bitmapContext = 0;
        User::LeaveIfError(bitmapDevice->CreateContext(bitmapContext));
        CleanupStack::PushL(bitmapContext);

        bitmapContext->BitBlt(TPoint(0, 0), icon->Bitmap());

        CleanupStack::PopAndDestroy(2, bitmapDevice);

        icon->SetBitmap(bitmap);    // Ownership transferred

        CleanupStack::Pop(bitmap);
    }

    // Always expect 256 mask to make conversion to GL_RGBA easier 
    if (mask->DisplayMode() != EGray256)
    {
        mask = new(ELeave) CFbsBitmap;
        CleanupStack::PushL(mask);

        User::LeaveIfError(mask->Create(icon->Mask()->SizeInPixels(), EGray256));

        CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(mask);
        CleanupStack::PushL(bitmapDevice);

        CFbsBitGc* bitmapContext = 0;
        User::LeaveIfError(bitmapDevice->CreateContext(bitmapContext));
        CleanupStack::PushL(bitmapContext);

        bitmapContext->BitBlt(TPoint(0, 0), icon->Mask());

        CleanupStack::PopAndDestroy(2, bitmapDevice);

        icon->SetMask(mask);    // Ownership transferred

        CleanupStack::Pop(mask);
    }

    // Now bitmap and mask point to either original or converted bitmaps, 
    // and ownership belongs to icon

    const TSize bitmapSize = bitmap->SizeInPixels();

    // sizeof(TUint32) == sizeof(RGBA)
    const TInt dataSize = bitmapSize.iWidth * bitmapSize.iHeight * sizeof(TUint32);
    TUint8* data = new(ELeave) TUint8[dataSize];

    // Perform copy and conversion from BGR(A) to RGB(A)
    bitmap->LockHeap();
    mask->LockHeap();

    // TODO: Alpha component removed, as it seems to be corrupted from
    // subsequent reads from SVG file

    TUint8* rgb = reinterpret_cast<TUint8*>(bitmap->DataAddress());
//    TUint8* alpha = reinterpret_cast<TUint8*>(mask->DataAddress());

    for(TInt i = 0, j = 0; i < dataSize; i += 4, j += 3)
    {
        data[i + 0] = rgb[j + 2];
        data[i + 1] = rgb[j + 1];
        data[i + 2] = rgb[j + 0];
        data[i + 3] = 0xc0; //alpha[i / 4];
    }

    // Generate OpenGL texture
    ::glGenTextures(1, &iTextureId); 
    ::glBindTexture(GL_TEXTURE_2D, iTextureId);

    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    ::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    ::glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmapSize.iWidth, bitmapSize.iHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);

    mask->UnlockHeap();
//.........这里部分代码省略.........

CFbsBitmap* AknBitmapMirrorUtils::CreateBitmapOptimizedL(CFbsBitmap* aSourceBitmap, TInt aMirrorDirection)
    {
    // Check if displaymode is optimized, fallback to non-optimized version if not.
    TBool fallback = ETrue;
    TDisplayMode displayMode = aSourceBitmap->DisplayMode();
    switch( displayMode )
        {
        case EGray256:
        case EColor256:
        case EColor4K:
        case EColor64K:
            fallback = EFalse;
            break;
        default:
            fallback = ETrue;
        }

    // Check if mirroring mode is supported, fallback to non-optimized version if not.
	if ((aMirrorDirection != EAknVerticalMirroring) && (aMirrorDirection != EAknHorizontalMirroring))
		{
		fallback = ETrue;	
		}

    if( fallback )
		return CreateBitmapL(aSourceBitmap, aMirrorDirection);
    
	// Prepare destination bitmap
    User::LeaveIfNull(aSourceBitmap);
    CFbsBitmap* destinationBitmap = new (ELeave) CFbsBitmap();
    CleanupStack::PushL(destinationBitmap);   

    TSize sourceBitmapSize = aSourceBitmap->SizeInPixels();            
    TRect sourceRect = TRect(TPoint(0,0), sourceBitmapSize);
    TSize destinationBitmapSize(sourceRect.Width(), sourceRect.Height()); 

    User::LeaveIfError(destinationBitmap->Create(destinationBitmapSize, aSourceBitmap->DisplayMode()));

	// Check source, if rom bitmap or compressed then create uncompressed ram bitmap
    TBool srcTemporary = EFalse;
    if( aSourceBitmap->IsRomBitmap() )
        {
        srcTemporary = ETrue;
        }
        
    // Heap lock for FBServ large chunk to prevent background
    // compression of aSrcBitmap after if IsCompressedInRAM returns EFalse
    aSourceBitmap->LockHeapLC( ETrue ); // fbsheaplock
    TBool fbsHeapLock = ETrue;        
        
    if( aSourceBitmap->IsCompressedInRAM() )
        {
        srcTemporary = ETrue;
        }
    if( aSourceBitmap->ExtendedBitmapType() != KNullUid  )
        {
        srcTemporary = ETrue;
        }

    CFbsBitmap* realSource = aSourceBitmap;
    if( srcTemporary )
        {
        CleanupStack::PopAndDestroy(); // fbsheaplock
        fbsHeapLock = EFalse;
        
        realSource = new (ELeave) CFbsBitmap();
        CleanupStack::PushL( realSource );
        User::LeaveIfError( realSource->Create( sourceBitmapSize, aSourceBitmap->DisplayMode() ) );
        CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL( realSource );
        CleanupStack::PushL( dev );
        CFbsBitGc* gc = NULL;
        User::LeaveIfError( dev->CreateContext( gc ) );
        CleanupStack::PushL( gc );
        gc->BitBlt( TPoint(0,0), aSourceBitmap );
        CleanupStack::PopAndDestroy(2); // dev, gc
        }

	// Heap lock for FBServ large chunk is only needed with large bitmaps.
    if (!fbsHeapLock)
    	{
	    if ( realSource->IsLargeBitmap() || destinationBitmap->IsLargeBitmap() )
	        {
	        destinationBitmap->LockHeapLC( ETrue ); // fbsheaplock
	        }
	    else
	        {
	        CleanupStack::PushL( (TAny*)NULL );
	        }
    	}

    TUint32* srcAddress = realSource->DataAddress();
    TUint32* trgAddress = destinationBitmap->DataAddress();

    if ( displayMode == EColor4K || displayMode == EColor64K )
        {
        TInt srcScanLen16 = CFbsBitmap::ScanLineLength(sourceBitmapSize.iWidth, displayMode) / 2;
        TInt trgScanLen16 = CFbsBitmap::ScanLineLength(destinationBitmapSize.iWidth, displayMode) / 2;
        TInt srcScanLen32 = CFbsBitmap::ScanLineLength(sourceBitmapSize.iWidth, displayMode) / 4;
        TInt trgScanLen32 = CFbsBitmap::ScanLineLength(destinationBitmapSize.iWidth, displayMode) / 4;

	    switch (aMirrorDirection)
//.........这里部分代码省略.........