with-graphics-state Macro

Summary

Binds the graphics state values of a port to a list of arguments and executes a body of code.

Package

graphics-ports

Signature

with-graphics-state (port &rest args &key state transform foreground background operation stipple pattern fill-style thickness scale-thickness dashed dash line-end-style line-joint-style mask mask-x mask-y font shape-mode text-mode compositing-mode mask-transform) body => result

Arguments

Values

Description

The macro with-graphics-state binds the graphics state values for port according to the values of the keyword arguments transform, foreground, background, operation, stipple, pattern, fill-style, thickness, scale-thickness, dashed, dash, line-end-style, line-joint-style, mask, mask-x, mask-y, font, shape-mode, text-mode, compositing-mode and mask-transform. Unspecified keywords leave the associated slots unchanged. The keyword arguments args correspond to the slots in the graphics state, as described in graphics-state.

If state is non-nil then the graphics-state of port is bound to it before the other keywords are processed.

The forms in body are evaluated as an implicit progn with the new graphics stare bound to port.

For example:

(with-graphics-state (port :thickness 12 :foreground my-color) ...)

Arguments that are not supplied default to the current state of that slot in the graphics-state. stipple is used only on X11/Motif.

mask-x and mask-y are deprecated. They work only when the drawing-mode is :compatible and the platform is GTK+ or X11/Motif.

Examples

(setf gstate (make-graphics-state))
 
(setf (graphics-state-foreground gstate) my-color)
 
(with-graphics-state (port :state gstate)
  (draw-rectangle port image-1 100 100))

See also

graphics-state
set-graphics-state
with-graphics-translation
with-graphics-post-translation
with-graphics-scale
with-graphics-rotation
with-graphics-transform
with-graphics-transform-reset
with-graphics-mask
13 Drawing - Graphics Ports