The function
gp:pixblt
is deprecated. This is because
drawing-mode
:quality
does not support the
operation
argument and also because
gp:pixblt
ignores transforms which means it does not always work as expected. In particular, it can it can draw to the wrong coordinates inside the
display-callback
of
capi:output-pane
.
Use instead the new function
gp:copy-area
, which copies a rectangular area from one graphics port to another taking account of the transform.
See also the
gp:graphics-state
parameter
compositing-mode
for a way to control how
gp:copy-area
blends the source and the target.
LispWorks Release Notes and Installation Guide - 23 Dec 2011