A graphics port.

A graphics port.

A real number.

A real number.

A real number.

A real number.

A real number.

A real number.

The ```
copy-pixels
```

function copies a rectangular area from one port to another. The *
transform*
, *
mask*
, *
mask-x*
and *
mask-y*
from the *
to-port*
's graphics state are used. The (*
to-x to-y*
) is transformed according to *
to-port*
's transform, but the image is not scaled or rotated. The *
to-port*
and *
from-port*
need not be the same depth and can be the same object. The *
from-x*
and *
from-y*
values are interpreted as pixel positions in the window coordinates of *
from-port*
, that is, they are not transformed by *
from-port*
's transform.

LispWorks CAPI Reference Manual - 21 Dec 2009