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;;; guile-sdl3 -- Scheme bindings for SDL3
;;; Copyright © 2024 David Thompson <dthompson2@worcester.edu>
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;; http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.
;;; Commentary:
;;
;; Low-level FFI binding utilities.
;;
;;; Code:
(define-module (sdl3 bindings utils)
#:use-module (sdl3 config)
#:use-module (sdl3 guardian)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-9 gnu)
#:use-module (system foreign)
#:use-module (system foreign-library)
#:export (bool
define-sdl
define-sdl-pointer-type))
;; Type aliases:
(define bool uint8)
(define-syntax define-sdl
(lambda (stx)
(syntax-case stx (->)
((_ name arg-type ... -> return-type)
#`(define name
(foreign-library-function %libsdl3
#,(symbol->string (syntax->datum #'name))
#:arg-types (list arg-type ...)
#:return-type return-type)))
((_ name arg-type ...)
#'(define-sdl name arg-type ... -> void)))))
(define-syntax-rule (define-sdl-pointer-type name
pred wrap unwrap
destroyed-pred set-destroyed
print)
(begin
(define-record-type name
(ctor ptr)
pred
(ptr unwrap)
(destroyed? destroyed-pred set-destroyed))
(define (wrap ptr)
(sdl-protect (ctor ptr)))
(set-record-type-printer! name print)))
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