The new function
gp:port-drawing-mode-quality-p
tests whether a port does
:quality
drawing.
A graphics port does quality drawing if it was not made with
drawing-mode
:compatible
, and the underlying library supports this. Microsoft Windows and Cocoa always support it, GTK+ supports it from version 2.8 onwards, and Motif never supports it.
gp:port-drawing-mode-quality-p
is used in this example:
examples/capi/graphics/images-with-alpha.lisp.
LispWorks Release Notes and Installation Guide - 23 Dec 2011