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@@ -1,7 +1,7 @@
TclTkAqua README
----------------
-RCS: @(#) $Id: README,v 1.9 2003/10/01 14:35:32 das Exp $
+RCS: @(#) $Id: README,v 1.10 2004/11/11 01:24:32 das Exp $
This is the README file for the Mac OS X native versions of Tcl & Tk.
@@ -83,6 +83,26 @@ you expect. (Wish started from the Finder inherits the Finder's environment
variables, which are essentially those set in $HOME/.MacOSX/environment.plist
and not those set by your shell configuration files).
+- As of Tk 8.4.7, AquaTk has a version of the low-level drawing primitives using
+the CoreGraphics routines - the code is primarily due to James Tittle. There
+were numerous problems with the QD version, mostly due to the different drawing
+model of QD & Tk. CG also trivially supports dashed lines, and the various end
+caps & miters. So this is a great improvement.
+
+The old QD code is retained for now, just in case there are any
+compatibility problems. To switch back to the QD drawing, just put:
+
+set tk::mac::useCGDrawing 0
+
+in your script before you do drawing. Also the CG drawing can anti-alias line drawing.
+However, anti-aliased thin lines look washed out, so the threshold for antialiasing
+is set to 3 pixel width lines. You can change this if you want by putting:
+
+set tk::mac::CGAntialiasLimit <limit>
+
+in your script before drawing, in which case only lines thinner that <limit> pixels
+will not be antialiased.
+
- Quickdraw text antialiasing is enabled by default when available (from 10.1.5
onwards). Changing the global boolean variable '::tk::mac::antialiasedtext'
allows to dis/enable antialiasing on the fly from tcl (even for existing text).