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;;; -*- Mode:Lisp; Package:XLIB; Syntax:COMMON-LISP; Base:10; Lowercase:T -*-
;;; CLX interface for Trapezoid Extension.
;;;
;;; TEXAS INSTRUMENTS INCORPORATED
;;; P.O. BOX 2909
;;; AUSTIN, TEXAS 78769
;;;
;;; Copyright (C) 1987 Texas Instruments Incorporated.
;;;
;;; Permission is granted to any individual or institution to use, copy, modify,
;;; and distribute this software, provided that this complete copyright and
;;; permission notice is maintained, intact, in all copies and supporting
;;; documentation.
;;;
;;; Texas Instruments Incorporated provides this software "as is" without
;;; express or implied warranty.
;;;
(in-package :xlib)
(export '(draw-filled-trapezoids
gcontext-trapezoid-alignment ;; Setf'able
))
(define-extension "ZoidExtension")
(defun draw-filled-trapezoids (drawable gcontext points)
;; Draw trapezoids on drawable using gcontext.
;; Points are a list of either (y1 y2 y3 y4 x1 x2) ;; x-aligned
;; or (x1 x2 x3 x4 y1 y2) ;; y-aligned
;; Alignment is determined by the GCONTEXT [see gcontext-trapezoid-alignment]
;; Alignment is set with the ALIGNMENT keyword argument, which may be
;; :X, :Y, or NIL (use previous alignment)
(declare (type drawable drawable)
(type gcontext gcontext)
(type sequence points))
(let* ((display (drawable-display drawable))
(opcode (extension-opcode display "ZoidExtension")))
(with-buffer-request (display opcode :gc-force gcontext)
((data card8) 1) ;; X_PolyFillZoid
(drawable drawable)
(gcontext gcontext)
((sequence :format int16) points))))
(define-gcontext-accessor trapezoid-alignment :default :x
:set-function set-trapezoid-alignment)
(defun set-trapezoid-alignment (gcontext alignment)
(declare (type (member :x :y) alignment))
(let* ((display (gcontext-display gcontext))
(opcode (extension-opcode display "ZoidExtension")))
(with-buffer-request (display opcode)
((data card8) 2) ;; X_SetZoidAlignment
(gcontext gcontext)
((member8 %error :x :y) alignment))))
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