;;
;; chicken-sdl2-ttf: CHICKEN Scheme bindings to SDL_ttf 2
;;
;; Copyright © 2015  John Croisant.
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;;
;; - Redistributions of source code must retain the above copyright
;;   notice, this list of conditions and the following disclaimer.
;;
;; - Redistributions in binary form must reproduce the above copyright
;;   notice, this list of conditions and the following disclaimer in
;;   the documentation and/or other materials provided with the
;;   distribution.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
;; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
;; COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
;; INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
;; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
;; STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
;; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
;; OF THE POSSIBILITY OF SUCH DAMAGE.


(export font?)


(define-record-type ttf:font
  (wrap-font pointer)
  font?
  (pointer font-pointer font-pointer-set!))


(define (unwrap-font thing)
  (cond
   ((font? thing)
    (font-pointer thing))
   ((or (pointer? thing) (locative? thing) (not thing))
    thing)
   (else
    (error "Cannot convert to TTF_Font pointer"
           thing))))


(define-foreign-type TTF_Font*
  (nonnull-c-pointer "TTF_Font")
  unwrap-font
  wrap-font)


(define-record-printer (ttf:font record out)
  (display "#<ttf:font" out)
  (let ((address (pointer->address (font-pointer record))))
    (if (= 0 address)
        (display " NULL" out)
        (display (sprintf " 0x~X" address) out)))
  (display ">" out))


(define-type ttf:font (struct ttf:font))