本文整理汇总了C++中TRgb::Gray256方法的典型用法代码示例。如果您正苦于以下问题：C++ TRgb::Gray256方法的具体用法？C++ TRgb::Gray256怎么用？C++ TRgb::Gray256使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TRgb的用法示例。
在下文中一共展示了TRgb::Gray256方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: switch
// ---------------------------------------------------------------------------
// Convert device-independent color to device-dependent color.
// ---------------------------------------------------------------------------
//
TInt CPeninputPenTraceDecorator::Rgb2DeviceColor( TDisplayMode aDisplayMode, const TRgb& aColor )
{
switch( aDisplayMode )
{
case EGray2:
{
return aColor.Gray2();
}
case EGray4:
{
return aColor.Gray4();
}
case EGray16:
{
return aColor.Gray16();
}
case EGray256:
{
return aColor.Gray256();
}
case EColor16:
{
return aColor.Color16();
}
case EColor256:
{
return aColor.Color256();
}
case EColor64K:
{
return aColor.Color64K();
}
case EColor16M:
{
return aColor.Color16M();
}
case EColor4K:
{
return aColor.Color4K();
}
case EColor16MU:
{
return aColor.Color16MU();
}
case EColor16MA:
{
return aColor.Color16MA();
}
case EColor16MAP:
{
return aColor.Color16MAP();
}
default:
return aColor.Internal();
}
}示例2: VerticalGradientAlphaL
/**
Draws a VerticalGradient onto a CFbsBitmap from top/color aLo to bottom/aHi
*/
void CTe_graphicsperformanceSuiteStepBase::VerticalGradientAlphaL(CFbsBitmap* aBitmap, TRgb aLo, TRgb aHi)
{
const TSize size = aBitmap->SizeInPixels();
const TDisplayMode mode = aBitmap->DisplayMode();
const TInt scanLineLength = CFbsBitmap::ScanLineLength(size.iWidth, mode);
HBufC8* buffer = HBufC8::NewL(scanLineLength);
CleanupStack::PushL(buffer);
TPtr8 des = buffer->Des();
des.SetLength(scanLineLength);
for(TInt i=0; i<size.iHeight; i++)
{
TRgb color = InterpolateColour(aLo, aHi, i, size.iHeight);
switch(mode)
{
case EGray256:
{
TUint8 g = color.Gray256();
TUint8* p = (TUint8*)des.Ptr();
for(TInt j=0; j<size.iWidth; j++)
{
p[j] = g;
}
}
break;
case EColor64K:
{
TUint16 g = color._Color64K();
TUint16* p = (TUint16*)des.Ptr();
for(TInt j=0; j<size.iWidth/2; j++)
{
p[j] = g;
}
}
break;
case EColor16MU:
{
TUint32 rgba = color._Color16MU();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
case EColor16MA:
{
TUint32 rgba = color._Color16MA();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
case EColor16MAP:
{
TUint32 rgba = color._Color16MAP();
TUint32* p = (TUint32*)des.Ptr();
for(TInt j=0; j<(size.iWidth/4); j++)
{
p[j] = rgba;
}
}
break;
default:
ASSERT(EFalse);
break;
}
aBitmap->SetScanLine(des, i);
}
CleanupStack::PopAndDestroy(buffer);
}