X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/15770d1a1c5fd4f1920abb4f85a0c35b6c73c869..4eb438cf7c42d5ceaa60b55048b5d0dc36c3986b:/docs/latex/wx/dc.tex

diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex
index 56a89cfbb9..95d44545be 100644
--- a/docs/latex/wx/dc.tex
+++ b/docs/latex/wx/dc.tex
@@ -9,6 +9,13 @@ if the device context is used as a parameter.
 Derived types of wxDC have documentation for specific features
 only, so refer to this section for most device context information.
 
+% VZ: we should really document them instead of this lame excuse, but I don't
+%     have time for it now, when it is done please remove this
+Please note that in addition to the versions of the methods documented here,
+there are also versions which accept single {\tt wxPoint} parameter instead of
+two {\tt wxCoord} ones or {\tt wxPoint} and {\tt wxSize} instead of four of
+them.
+
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}
@@ -54,11 +61,11 @@ released for each drawing operation.
 
 \func{bool}{Blit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
   \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{int}{ logicalFunc = wxCOPY},
-  \param{bool }{useMask = FALSE}}
+  \param{bool }{useMask = FALSE}, \param{wxCoord}{ xsrcMask = -1}, \param{wxCoord}{ ysrcMask = -1}}
 
 Copy from a source DC to this DC, specifying the destination
-coordinates, size of area to copy, source DC, source coordinates, and
-logical function.
+coordinates, size of area to copy, source DC, source coordinates,
+logical function, whether to use a bitmap mask, and mask source position.
 
 \wxheading{Parameters}
 
@@ -79,7 +86,7 @@ logical function.
 \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:
+selected into the source device context. The Windows implementation does the following if MaskBlt cannot be used:
 
 \begin{enumerate}
 \item Creates a temporary bitmap and copies the destination area into it.
@@ -96,8 +103,21 @@ and the background colour set to WHITE.
 
 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
+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.
+
 }
 
+\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.
@@ -108,6 +128,24 @@ See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
 
 \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
 
+\begin{comment}
+\membersection{wxDC::CacheEnabled}\label{wxdccacheenabled}
+
+\func{static bool}{CacheEnabled}{\void}
+
+On supported platforms (currently only Windows), returns TRUE
+if the DC cache is enabled. The DC cache
+can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::ClearCache}
+\end{comment}
+
 \membersection{wxDC::CalcBoundingBox}\label{wxdccalcboundingbox}
 
 \func{void}{CalcBoundingBox}{\param{wxCoord }{x}, \param{wxCoord }{y}}
@@ -126,6 +164,26 @@ Adds the specified point to the bounding box which can be retrieved with
 
 Clears the device context using the current background brush.
 
+\begin{comment}
+\membersection{wxDC::ClearCache}\label{wxdcclearcache}
+
+\func{static void}{ClearCache}{\void}
+
+On supported platforms (currently only Windows), clears
+the contents of the DC cache (one bitmap and two Windows device contexts). The DC cache
+can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps. You should
+call ClearCache at the end of length DC operations if you wish to only use
+the cache transiently; you should also call it as your application exits.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::CacheEnabled}
+\end{comment}
+
 \membersection{wxDC::CrossHair}\label{wxdccrosshair}
 
 \func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
@@ -213,8 +271,7 @@ filling the shape.
  \param{double}{ start}, \param{double}{ end}}
 
 Draws an arc of an ellipse. The current pen is used for drawing the arc and
-the current brush is used for drawing the pie. This function is currently only available for
-X window and PostScript device contexts.
+the current brush is used for drawing the pie.
 
 {\it x} and {\it y} specify the x and y coordinates of the upper-left corner of the rectangle that contains
 the ellipse.
@@ -256,6 +313,10 @@ deleting the list of points.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
+\perlnote{The wxPerl version of this method accepts 
+  as its first parameter a reference to an array
+  of wxPoint objects.}
+
 \membersection{wxDC::DrawPolygon}\label{wxdcdrawpolygon}
 
 \func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
@@ -279,6 +340,10 @@ Note that wxWindows automatically closes the first and last points.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
+\perlnote{The wxPerl version of this method accepts 
+  as its first parameter a reference to an array
+  of wxPoint objects.}
+
 \membersection{wxDC::DrawPoint}\label{wxdcdrawpoint}
 
 \func{void}{DrawPoint}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
@@ -299,6 +364,11 @@ for filling the shape.
 
 Draws the text rotated by {\it angle} degrees.
 
+{\bf NB:} Under Win9x only TrueType fonts can be drawn by this function. In
+particular, a font different from {\tt wxNORMAL\_FONT} should be used as the
+latter is not a TrueType font. {\tt wxSWISS\_FONT} is an example of a font
+which is.
+
 \wxheading{See also}
 
 \helpref{DrawText}{wxdcdrawtext}
@@ -336,6 +406,9 @@ Draws a three-point spline using the current pen.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
+\perlnote{The wxPerl version of this method accepts a reference to an array
+  of wxPoint objects.}
+
 \membersection{wxDC::DrawText}\label{wxdcdrawtext}
 
 \func{void}{DrawText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
@@ -353,6 +426,23 @@ text more precisely.
 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}}
+
+On supported platforms (currently only Windows), enables the DC cache
+which can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::CacheEnabled}{wxdccacheenabled}, \helpref{wxDC::ClearCache}
+\end{comment}
+
 \membersection{wxDC::EndDoc}\label{wxdcenddoc}
 
 \func{void}{EndDoc}{\void}
@@ -434,6 +524,9 @@ Gets the rectangle surrounding the current clipping region.
 \pythonnote{No arguments are required and the four values defining the
 rectangle are returned as a tuple.}
 
+\perlnote{This method takes no arguments and returns a four element list
+{\tt ( \$x, \$y, \$width, \$height )}}
+
 \membersection{wxDC::GetFont}\label{wxdcgetfont}
 
 \func{wxFont\&}{GetFont}{\void}
@@ -479,6 +572,9 @@ is being worked on. Not available for wxPostScriptDC or wxMetafileDC.
 \pythonnote{For wxPython the wxColour value is returned and is not
 required as a parameter.}
 
+\perlnote{This method only takes the parameters {\tt x} and {\tt y} and returns
+a Wx::Colour value}
+
 \membersection{wxDC::GetSize}\label{wxdcgetsize}
 
 \func{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
@@ -509,6 +605,14 @@ implements the following methods:\par
 \end{twocollist}}
 }
 
+\perlnote{In place of a single overloaded method, wxPerl uses:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf GetSize()}}{Returns a Wx::Size}
+\twocolitem{{\bf GetSizeWH()}}{Returns a 2-element list
+  {\tt ( \$width, \$height )}}
+\end{twocollist}
+}}
+
 \membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
 
 \func{wxColour\&}{GetTextBackground}{\void}
@@ -544,6 +648,11 @@ See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
 \end{twocollist}}
 }
 
+\perlnote{In wxPerl this method is implemented as 
+  {\bf GetTextExtent( string, font = undef )} returning a four element
+  array {\tt ( \$width, \$height, \$descent, \$externalLeading )}
+}
+
 \membersection{wxDC::GetTextForeground}\label{wxdcgettextforeground}
 
 \func{wxColour\&}{GetTextForeground}{\void}
@@ -559,6 +668,8 @@ Gets the current text foreground colour (see \helpref{wxDC::SetTextForeground}{w
 
 Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetuserscale}).
 
+\perlnote{In wxPerl this method takes no arguments and returna a two element
+ array {\tt ( \$x, \$y )}}
 
 \membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
 
@@ -832,3 +943,38 @@ Message is a message to show whilst printing.
 
 Starts a document page (only relevant when outputting to a printer).
 
+\section{\class{wxDCClipper}}\label{wxdcclipper}
+
+This is a small helper class which sets the specified to its constructor
+clipping region and then automatically destroyes it in its destructor. Using
+it ensures that unwanted clipping region is not left set on the DC.
+
+\wxheading{Derived from}
+
+No base class
+
+\wxheading{Include files}
+
+<wx/dc.h>
+
+\wxheading{See also}
+
+\helpref{wxDC}{wxdc}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxDCClipper::wxDCClipper}
+
+\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{wxCoord }{x},\param{wxCoord }{y},\param{wxCoord }{w},\param{wxCoord }{h},}
+
+\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{const wxRect\&}{ rect}}
+
+Constructor: sets the the clipping region for the given device context to the
+specified rectangle.
+
+\membersection{wxDCClipper::\destruct{wxDCClipper}}
+
+\func{}{\destruct{wxDCClipper}}{\void}
+
+Destructor: destroyes the clipping region set in the constructor.
+