C++ TRgb::Red方法代码示例

/**
Interpolates between the two TRgb values aHi and aLo including alpha channel, with the value aX and the denoinator aN
*/	
TRgb CTe_graphicsperformanceSuiteStepBase::InterpolateColour(TRgb aLo, TRgb aHi, TInt aX, TInt aN)
	{
	TInt y = aN - aX;

	TUint8 a = (TUint8)( (aHi.Alpha()*aX + aLo.Alpha()*y)/aN );
	TUint8 r = (TUint8)( (aHi.Red()*aX + aLo.Red()*y)/aN );
	TUint8 g = (TUint8)( (aHi.Green()*aX + aLo.Green()*y)/aN );
	TUint8 b = (TUint8)( (aHi.Blue()*aX + aLo.Blue()*y)/aN );
	
	return TRgb(r, g, b, a);
	}

EXPORT_C TRgb ColorUtils::ColorAdjust(TRgb aColor,TInt aPercentage)
/** Brightens or darkens a 24-bit colour by a percentage. 

If the percentage given is less than 100%, a darker colour will be returned. 
The algorithm brightens or darkens each of the R, G and B channels equally.

@param aColor Input colour. 
@param aPercentage Percentage by which to adjust the input colour. 
@return The adjusted colour. */
	{
	// Poor algorithm for the moment, but it can improve and all apps that
	// use this will benefit. (I don't think the accuracy for a 16/256 color system
	// is really relevant anyway)
	TInt red=aColor.Red();
	TInt green=aColor.Green();
	TInt blue=aColor.Blue();
	TInt alpha=aColor.Alpha();
	if (aPercentage<=100)
		{
		red=(red * aPercentage)/100;
		green=(green * aPercentage)/100;
		blue=(blue * aPercentage)/100;
		}
	else
		{
		red = 255 - (((255 - red) * 100) / aPercentage);
		green = 255 - (((255 - green) * 100) / aPercentage);
		blue = 255 - (((255 - blue) * 100) / aPercentage);
		}
	return TRgb(red,green,blue,alpha);
	}

unsigned char CameraImage::getPixel(int x, int y) const
{
	TPoint pixelPosition(x,y);
	TRgb color;
    image->GetPixel(color, pixelPosition); 
    return ((color.Red() + color.Green() + color.Blue()) / 3);
}

void CGameImageLoader::CreateSurface()
{
   TSize imagesize = iBitmap->SizeInPixels();

   if (iPixelFormat)
   {
	// the image must be converted to the requested pixel format
	int x, y;
	TRgb pixel;
	TPoint point;

	TRAPD(error, iSurface = new Game::Surface(iPixelFormat, imagesize.iWidth, imagesize.iHeight));

	if( error != KErrNone )
	{
		iErrorCode = error;
		return;
	}

	if (!iSurface)
	{
		iErrorCode = KErrNoMemory;
		return;
	}

	for(y=0; y<imagesize.iHeight; y++)
	for(x=0; x<imagesize.iWidth; x++)
	{
		point.iX = x;
		point.iY = y;
		iBitmap->GetPixel(pixel, point);
		iSurface->setPixel(x, y, iPixelFormat->makePixel(pixel.Red(), pixel.Green(), pixel.Blue()));
	}
   }
   else
   {
	// no pixel conversion required
	Game::PixelFormat bitmapPixelFormat(12);
    Game::Surface tmpSurface(&bitmapPixelFormat, (Game::Pixel*)iBitmap->DataAddress(), imagesize.iWidth, imagesize.iHeight);
	
//	TRAPD(error, iSurface = new Game::Surface(&bitmapPixelFormat, (Game::Pixel*)iBitmap->DataAddress(), imagesize.iWidth, imagesize.iHeight));
	TRAPD(error, iSurface = new Game::Surface(&bitmapPixelFormat, &tmpSurface));

	if( error != KErrNone )
	{
        delete iSurface;
        iSurface = NULL;
		iErrorCode = error;
		return;
	}

	if (!iSurface)
	{
		iErrorCode = KErrNoMemory;
		return;
	}
   }
}

/**
Compare the window with the bitmap.
@param aScreen The screen device object
@param aBitmap The bitmap object for comparison
@return ETrue if the window and the bitmap is identified. Otherwise return EFalse.
*/
TBool CT_WServGenericpluginStepLoad::CompareDisplayL(CWsScreenDevice* aScreen, CFbsBitmap* aBitmap)
	{
	// Capture window display to bitmap
	CFbsBitmap* screenBitmap = new(ELeave) CFbsBitmap();
	CleanupStack::PushL(screenBitmap);
	User::LeaveIfError(screenBitmap->Create(KWinRect.Size(), iDisplayMode));
	User::LeaveIfError(aScreen->CopyScreenToBitmap(screenBitmap, KWinRect));	
	
	//Compare the window bitmap with the bitmap pass in for comparison
	TBool ret = ETrue;
	
	const TReal KErrorLimit = 0.05;
	
	TInt mismatchedPixels = 0;
	TRgb testWinPix = TRgb(0,0,0,0);
	TRgb checkWinPix = TRgb(0,0,0,0);
	for (TInt x = 0; x < KWinRect.Width(); x++)
		{
		for (TInt y = 0; y < KWinRect.Height(); y++)
			{
			screenBitmap->GetPixel(testWinPix, TPoint(x,y));
			aBitmap->GetPixel(checkWinPix, TPoint(x,y));
			
			//check if there are differeces between test Window colors and check Window colors
			if(((TReal)abs(testWinPix.Red() - checkWinPix.Red())/255) > KErrorLimit || 
					((TReal)abs(testWinPix.Blue() - checkWinPix.Blue())/255) > KErrorLimit || 
					((TReal)abs(testWinPix.Green() - checkWinPix.Green())/255) > KErrorLimit || 
					((TReal)abs(testWinPix.Alpha() - checkWinPix.Alpha())/255) > KErrorLimit)
				{
				mismatchedPixels++;  // -- Useful for debugging
				ret = EFalse;
				break;
				}
			}
		}
	
	/* INFO_PRINTF2(_L("Number of different pixels: %i"), mismatchedPixels); */ // -- Useful for debugging
	

	CleanupStack::PopAndDestroy(screenBitmap);	
	
	
	
	return ret;
	}

/**
   Auxilliary function for TestCaseID tbrdrcol-DrawColorCubeBackgroundNow
  
   This method converts a TRgb colour HSL format.
  
 */
THsl ColorConverter::RgbToHsl(TRgb aRgb)
	{
	const TInt r = aRgb.Red();
	const TInt g = aRgb.Green();
	const TInt b = aRgb.Blue();
	
	const TInt cmax = Max(r, Max(g,b));
	const TInt cmin = Min(r, Min(g,b));
	
	TInt h = 0;
	TInt l = (cmax + cmin) >> 1; // Divided with 2
	TInt s = 0;
	
	if (cmax==cmin) 
		{
		s = 0;
		h = 0; // it's really undefined
		} 
	else 
		{
		if ( l < (255/2) )
			{
			s = ((cmax-cmin)*255)/(cmax+cmin);
			}
		else
			{
			s = ((cmax-cmin)*255)/((2*255)-cmax-cmin);
			}
		
		TInt delta = cmax - cmin;
		
		if (r==cmax)
			{
			h = ((g-b)*255) / delta;
			}
		else if (g==cmax)
			{
			h = 2*255 + ((b-r)*255) / delta;
			}
		else
			{
			h = 4*255 + ((r-g)*255) / delta;
			}
		
		h /= 6;
		
		if (h<0)
			{
			h += (1*255);
			}
		}
	
	return THsl(h, s, l);
	}

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
}

EXPORT_C TInt CWsContainGraphicBitmap::UpdateColor(TRgb aColor)
	{
	if (!iIsReady)
		return KErrNotReady;
	// Send the color the server side
	TBuf8<3> cmd;
	TInt red = aColor.Red();
	TInt green = aColor.Green();
	TInt blue = aColor.Blue();
    //Append the color
	cmd.Append(red);
	cmd.Append(green);
	cmd.Append(blue);
	
	SendMessage(cmd);
	return Flush();
	}

void tst_QVolatileImage::fill()
{
    QVolatileImage img(100, 100, QImage::Format_ARGB32_Premultiplied);
    QColor col = QColor(10, 20, 30);
    img.fill(col.rgba());
    QVERIFY(img.imageRef().pixel(1, 1) == col.rgba());
    QVERIFY(img.toImage().pixel(1, 1) == col.rgba());

#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = static_cast<CFbsBitmap *>(img.duplicateNativeImage());
    QVERIFY(bmp);
    TRgb pix;
    bmp->GetPixel(pix, TPoint(1, 1));
    QCOMPARE(pix.Red(), col.red());
    QCOMPARE(pix.Green(), col.green());
    QCOMPARE(pix.Blue(), col.blue());
    delete bmp;
#endif
}

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
}

Color RenderThemeSymbian::platformActiveSelectionForegroundColor() const
{
    TRgb c = CEikonEnv::Static()->Color(EColorControlHighlightText);
    return Color(c.Red(),c.Green(),c.Blue());
}

TRect CPeninputPenTraceDecorator::DrawPoint( const TPoint& aPoint )
{
    if ( !iBitsBitmap || !iMaskBitmap || !iXSquareArray )
    {
        __ASSERT_DEBUG( EFalse, User::Panic( _L("PenTrace Decorator: invalid status"), 0 ) );
        return TRect();
    }

    TSize cvsize = iBitsBitmap->SizeInPixels();
    if ( cvsize.iWidth < 1 || cvsize.iHeight < 1 )
    {
        __ASSERT_DEBUG( EFalse, User::Panic( _L("PenTrace Decorator: invalid status"), 0 ) );
        return TRect();
    }

    TBitmapUtil bits( iBitsBitmap );
    TBitmapUtil mask( iMaskBitmap );

    TDrawLineParams params;

    bits.Begin( TPoint( 0, 0 ) );
    mask.Begin( TPoint( 0, 0 ) );

    if ( ETrue )
    {
        TDisplayMode mode = iDisplayMode;
        TRgb rgb = iPenTraceColor;
        TInt32 clr = (TInt32) Rgb2DeviceColor( mode, rgb );

        params.rtAffected = TRect();

        params.bits = &bits;
        params.mask = &mask;

        params.SqX = iXSquareArray;   // squares of X

        params.nW = cvsize.iWidth;   // width of destination
        params.nH = cvsize.iHeight;  // height of destination

        params.color = clr;
        params.bR = rgb.Red();       // value of red channel
        params.bG = rgb.Green();     // value of green channel
        params.bB = rgb.Blue();      // value of blue channel

        params.x1 = aPoint.iX << 4 ; // (x of start point) << 4
        params.y1 = aPoint.iY << 4 ; // (y of start point) << 4
        params.d1 = 1;               // width of start point

        params.x2 = aPoint.iX << 4;  // (x of end point) << 4
        params.y2 = aPoint.iY << 4;  // (y of end point) << 4
        params.d2 = 1;               // width of end point

        DrawLongSegment( &params );
    }

    mask.End();
    bits.End();

    iModified = ETrue;

    return params.rtAffected;
}

// ---------------------------------------------------------------------------
// Continue to draw a line in a series of lines.
// ---------------------------------------------------------------------------
//
TRect CPeninputPenTraceDecorator::DrawNextLine( const TPoint& aPt1, const TPoint& aPt2 )
{
    if ( !iBitsBitmap || !iMaskBitmap || !iXSquareArray )
    {
        __ASSERT_DEBUG( EFalse, User::Panic( _L("Pen Trace Decorator: invalid status"), 0 ) );
        return TRect();
    }

    TSize cvsize = iBitsBitmap->SizeInPixels();
    if ( cvsize.iWidth < 1 || cvsize.iHeight < 1 )
    {
        __ASSERT_DEBUG( EFalse, User::Panic( _L("Pen Trace Decorator: invalid status"), 0 ) );
        return TRect();
    }

    TInt width_start = 0 ;
    TInt width_end = 0;

    TInt penWidthDefault = 16;        //default width
    TInt penWidthMin = 8;             // min width
    TInt penWidthAdapt = 4;           // adaption factor
    TInt penPressureThreshold = 1200; // threshold of pressure

    TPoint pt1 = aPt1;
    TPoint pt2 = aPt2;

    width_start = iLastPenWidth;
    TInt pressure = ( pt1.iX - pt2.iX ) * ( pt1.iX - pt2.iX ) + ( pt1.iY - pt2.iY ) * ( pt1.iY - pt2.iY );
    if ( pressure >= penPressureThreshold )
    {
        width_end = penWidthMin;
    }
    else
    {
        width_end = (TUint8)( ( penWidthDefault * penWidthAdapt * ( penPressureThreshold - pressure ) + penPressureThreshold / 2 ) / penPressureThreshold + penWidthMin );
    }


    width_end = (TUint8)( ( width_start + width_end + 1 ) / 2 );
    iLastPenWidth = width_end;

    TBitmapUtil bits( iBitsBitmap );
    TBitmapUtil mask( iMaskBitmap );

    TDrawLineParams params;

    bits.Begin( TPoint( 0, 0 ) );
    mask.Begin( TPoint( 0, 0 ) );

    if (  ETrue  )
    {
        TDisplayMode mode = iDisplayMode;
        TRgb color = iPenTraceColor;
        TInt32 clrdev = (TInt32) Rgb2DeviceColor( mode, color );

        params.rtAffected = TRect();

        params.bits = &bits;
        params.mask = &mask;

        params.SqX = iXSquareArray;   // squares of X

        params.nW = cvsize.iWidth;   // width of destination
        params.nH = cvsize.iHeight;  // height of destination

        params.color = clrdev;
        params.bR = color.Red();     // value of red channel
        params.bG = color.Green();   // value of green channel
        params.bB = color.Blue();    // value of blue channel

        params.x1 = pt1.iX << 4 ;    // (x of start point) << 4
        params.y1 = pt1.iY << 4 ;    // (y of start point) << 4
        params.d1 = width_start;     // (width of start point) << 3

        params.x2 = pt2.iX << 4;     // (x of end point) << 4
        params.y2 = pt2.iY << 4;     // (y of end point) << 4
        params.d2 = width_end;       // (width of end point) << 3

        DrawLongSegment( &params );
    }

    mask.End();
    bits.End();

    iModified = ETrue;
    iLineCount++;

    return params.rtAffected;
}