File canvas-draw/chicken/canvas-draw-iup.scm artifact 9b1370885d part of check-in b1dcd0ebc6

(require-library canvas-draw-base)

(module canvas-draw-iup
	(context:iup make-canvas-action)
	(import scheme chicken foreign canvas-draw-base)

;; {{{ Data types

(foreign-declare
	"#include <cd.h>\n"
	"#include <cdiup.h>\n")

(include "canvas-draw-types.scm")

;; }}}

;; {{{ Context types

(define context:iup
	(foreign-value "CD_IUP" nonnull-context))

;; }}}

;; {{{ Auxiliary functions

(define (make-canvas-action proc)
	(let ([canvas #f])
		(lambda (handle x y)
			(unless canvas (set! canvas (make-canvas context:iup handle)))
			(call-with-canvas canvas (cut proc <> x y)))))

;; }}}

)