SYNOPSIS
w = gcx:window(x, y, w, h)
DESCRIPTION
Returns a new context that is a window of the passed context gcx.
Note that this is a raw, most basic window. There is no sophisticated clipping mechanism implemeted yet.
It is just a rectangle that shares it's memory with the referenced context gcx.
If x or y is nil, it's value is centered into the referenced context gcx.
The window inherits the orientation of the parent.
RETURN VALUE
A graphics context handle.
ERRORS
Raises an error if gcx is not a graphics context.
EXAMPLE
>
w = gcx:window(16, 16, 320, 32)