This sequence of operations ensures that the source's transparent area need not be black,
and logical functions are supported.
-{\bf Note:} on Windows, blitting with masks can be speeded up considerably by using
-\helpref{DC cacheing}{wxdcenablecache}. You can also influence whether MaskBlt
+{\bf Note:} on Windows, blitting with masks can be speeded up considerably by compiling
+wxWindows with the wxUSE\_DC\_CACHE option enabled. You can also influence whether MaskBlt
or the explicit mask blitting code above is used, by using \helpref{wxSystemOptions}{wxsystemoptions} and
setting the {\bf no-maskblt} option to 1.
\helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
+\begin{comment}
\membersection{wxDC::CacheEnabled}\label{wxdccacheenabled}
\func{static bool}{CacheEnabled}{\void}
\wxheading{See also}
\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::ClearCache}
+\end{comment}
\membersection{wxDC::CalcBoundingBox}\label{wxdccalcboundingbox}
Clears the device context using the current background brush.
+\begin{comment}
\membersection{wxDC::ClearCache}\label{wxdcclearcache}
\func{static void}{ClearCache}{\void}
\wxheading{See also}
\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::CacheEnabled}
+\end{comment}
\membersection{wxDC::CrossHair}\label{wxdccrosshair}
but it is ignored by wxMSW. Thus, you should avoid using logical functions
with this function in portable programs.
+\begin{comment}
\membersection{wxDC::EnableCache}\label{wxdcenablecache}
\func{static void}{EnableCache}{\param{bool}{ enableCache}}
\wxheading{See also}
\helpref{wxDC::CacheEnabled}{wxdccacheenabled}, \helpref{wxDC::ClearCache}
+\end{comment}
\membersection{wxDC::EndDoc}\label{wxdcenddoc}