A graphics port for a window.
A color designator.
A list or
One of the keywords
create-pixmap-port creates a pixmap-port and its window system representation. The
argument specifies the color-user, used for color conversions, and its representation may also be used by the library to match the pixmap port properties. The value of
is used to initialize the
t, the pixmap is cleared to its background color, otherwise the initial colors will be non-deterministic. If
is a list of the form (
x y width height
), only that part of the pixmap is cleared initially. The default value is
is non-nil, the pixmap graphics port collects pixel coordinates corresponding to the left, top, right, and bottom extremes of the drawing operations taking place within the body forms, and if these extend beyond the edges of the pixmap (into negative coordinates for example) the entire drawing is offset by an amount which ensures it remains within the port. It is as if the port moves its relative origin in order to accommodate the drawing. If the drawing size is greater than the screen size, then some of it is lost. The default value is
If collect is non-nil, this causes the drawing extremes to be collected but without having the pixmap shift to accommodate the drawing, as relative does. The extreme values can be read using the get-bounds function. The default value of collect is relative .
CAPI User Guide and Reference Manual (Unix version) - 25 Feb 2015