<wx/dc.h>
+\wxheading{Library}
+
+\helpref{wxCore}{librarieslist}
+
\wxheading{See also}
\helpref{Overview}{dcoverview}
\wxheading{See also}
-\helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
+\helpref{wxDC::StretchBlit}{wxdcstretchblit}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
\begin{comment}
\membersection{wxDC::DeviceToLogicalX}\label{wxdcdevicetologicalx}
-\func{wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
Convert device X coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalXRel}\label{wxdcdevicetologicalxrel}
-\func{wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
Convert device X coordinate to relative logical coordinate, using the current
mapping mode but ignoring the x axis orientation.
\membersection{wxDC::DeviceToLogicalY}\label{wxdcdevicetologicaly}
-\func{wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
Converts device Y coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalYRel}\label{wxdcdevicetologicalyrel}
-\func{wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
Convert device Y coordinate to relative logical coordinate, using the current
mapping mode but ignoring the y axis orientation.
\membersection{wxDC::GetTextExtent}\label{wxdcgettextextent}
\constfunc{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w}, \param{wxCoord *}{h},\\
- \param{wxCoord *}{descent = NULL}, \param{wxCoord *}{externalLeading = NULL}, \param{wxFont *}{font = NULL}}
+ \param{wxCoord *}{descent = NULL}, \param{wxCoord *}{externalLeading = NULL}, \param{const wxFont *}{font = NULL}}
\constfunc{wxSize}{GetTextExtent}{\param{const wxString\& }{string}}
\membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
-\func{wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
Converts logical X coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceXRel}\label{wxdclogicaltodevicexrel}
-\func{wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
Converts logical X coordinate to relative device coordinate, using the current
mapping mode but ignoring the x axis orientation.
\membersection{wxDC::LogicalToDeviceY}\label{wxdclogicaltodevicey}
-\func{wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
Converts logical Y coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceYRel}\label{wxdclogicaltodeviceyrel}
-\func{wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
Converts logical Y coordinate to relative device coordinate, using the current
mapping mode but ignoring the y axis orientation.
Sets the current brush for the DC.
If the argument is wxNullBrush, the current brush is selected out of the device
-context, and the original brush restored, allowing the current brush to
+context (leaving wxDC without any valid brush), allowing the current brush to
be destroyed safely.
See also \helpref{wxBrush}{wxbrush}.
Sets the current pen for the DC.
If the argument is wxNullPen, the current pen is selected out of the device
-context, and the original pen restored.
+context (leaving wxDC without any valid pen), allowing the current brush to
+be destroyed safely.
See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
when drawing into a monochrome bitmap.
Starts a document page (only relevant when outputting to a printer).
+
+\membersection{wxDC::StretchBlit}\label{wxdcstretchblit}
+
+\func{bool}{StretchBlit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ dstWidth}, \param{wxCoord}{ dstHeight},
+ \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{wxCoord}{ srcWidth}, \param{wxCoord}{ srcHeight},
+ \param{int}{ logicalFunc = wxCOPY}, \param{bool }{useMask = false}, \param{wxCoord}{ xsrcMask = -1}, \param{wxCoord}{ ysrcMask = -1}}
+
+Copy from a source DC to this DC, specifying the destination
+coordinates, destination size, source DC, source coordinates,
+size of source area to copy, logical function, whether to use a bitmap mask,
+and mask source position.
+
+\wxheading{Parameters}
+
+\docparam{xdest}{Destination device context x position.}
+
+\docparam{ydest}{Destination device context y position.}
+
+\docparam{dstWidth}{Width of destination area.}
+
+\docparam{dstHeight}{Height of destination area.}
+
+\docparam{source}{Source device context.}
+
+\docparam{xsrc}{Source device context x position.}
+
+\docparam{ysrc}{Source device context y position.}
+
+\docparam{srcWidth}{Width of source area to be copied.}
+
+\docparam{srcHeight}{Height of source area to be copied.}
+
+\docparam{logicalFunc}{Logical function to use: see \helpref{wxDC::SetLogicalFunction}{wxdcsetlogicalfunction}.}
+
+\docparam{useMask}{If true, Blit does a transparent blit using the mask that is associated with the bitmap
+selected into the source device context. The Windows implementation does the following if \texttt{MaskBlt} cannot be used:
+
+\begin{enumerate}
+\item Creates a temporary bitmap and copies the destination area into it.
+\item Copies the source area into the temporary bitmap using the specified logical function.
+\item Sets the masked area in the temporary bitmap to BLACK by ANDing the
+mask bitmap with the temp bitmap with the foreground colour set to WHITE
+and the background colour set to BLACK.
+\item Sets the unmasked area in the destination area to BLACK by ANDing the
+mask bitmap with the destination area with the foreground colour set to BLACK
+and the background colour set to WHITE.
+\item ORs the temporary bitmap with the destination area.
+\item Deletes the temporary bitmap.
+\end{enumerate}
+
+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 compiling
+wxWidgets with the \texttt{wxUSE\_DC\_CACHE} option enabled. You can also influence whether \texttt{MaskBlt}
+or the explicit mask blitting code above is used, by using \helpref{wxSystemOptions}{wxsystemoptions} and
+setting the {\bf no-maskblt} option to 1.
+
+}
+
+\docparam{xsrcMask}{Source x position on the mask. If both xsrcMask and ysrcMask are -1, xsrc and ysrc
+will be assumed for the mask source position. Currently only implemented on Windows.}
+
+\docparam{ysrcMask}{Source y position on the mask. If both xsrcMask and ysrcMask are -1, xsrc and ysrc
+will be assumed for the mask source position. Currently only implemented on Windows.}
+
+
+\wxheading{Remarks}
+
+There is partial support for Blit in wxPostScriptDC, under X.
+
+wxDC::StretchBlit is only implemented under wxMAC and wxMSW.
+
+See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
+
+\newsince{2.9.0}
+
+\wxheading{See also}
+
+\helpref{wxDC::Blit}{wxdcblit}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
+
projects / wxWidgets.git / blobdiff