;;
;; chicken-sdl2: CHICKEN Scheme bindings to Simple DirectMedia Layer 2
;;
;; Copyright © 2013–2021  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,
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;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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;; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
;; OF THE POSSIBILITY OF SUCH DAMAGE.


(export palette-ncolors  palette-ncolours
        %palette-colors
        make-palette
        make-palette*)


;;; NOTE: Public type declarations are in shared/reexport-types.scm


(define-struct-field-accessors
  SDL_Palette*
  palette?
  ("ncolors"
   type:   Sint32
   getter: palette-ncolors)
  ("colors"
   type: c-pointer
   getter: %palette-colors)
  ;; omitted: version  (internal use)
  ;; omitted: refcount (internal use)
  )


(define palette-ncolours palette-ncolors)


(define (make-palette #!optional (ncolors 256))
  (%autofree-struct!
   (make-palette* ncolors)
   free-palette!))

(define (make-palette* #!optional (ncolors 256))
  (let ((palette (SDL_AllocPalette ncolors)))
    (if (struct-null? palette)
        (abort (sdl-failure "SDL_AllocPalette" #f))
        palette)))