hint to alpha colours added

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40863 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex
index bb6f457df8bcf5e37c15b540ea3eb4c30e97cfe6..e0f3256f499c1c592a4992fc047ff08e30c8fb1a 100644 (file)
--- a/docs/latex/wx/dc.tex
+++ b/docs/latex/wx/dc.tex
@@ -18,6 +18,12 @@ 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{Support for Transparency / Alpha Channel}
+
+On Mac OS X when using Core Graphics (wx\_MAC\_USE\_CORE\_GRAPHICS set to 1) 
+colors with alpha are supported, so instances  {\tt wxPen} or  {\tt wxBrush} that are built from  {\tt wxColour} use
+the color's alpha values when stroking or filling.
+
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}