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authorDavid Thompson <dthompson2@worcester.edu>2024-10-02 21:22:19 -0400
committerDavid Thompson <dthompson2@worcester.edu>2024-10-19 21:49:01 -0400
commit9b1d91b4c68477145434021ea7392c16d849ebaa (patch)
tree3e6c3934c530d4cc79a85adc95729f8da2af61c3 /sdl3/events.scm
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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 events)
+ #:use-module (bstruct)
+ #:use-module (sdl3 bindings events)
+ #:use-module (system foreign)
+ #:export (event?
+ event-type
+ poll-event))
+
+(define (make-event)
+ (bstruct-alloc SDL_Event))
+
+(define (event? obj)
+ (bstruct? SDL_Event obj))
+
+(define (event-type event)
+ (event-type->symbol (bstruct-ref SDL_Event event type)))
+
+(define (poll-event)
+ (and (eq? (SDL_PollEvent %null-pointer) 1)
+ (let ((event (make-event)))
+ (SDL_PollEvent (bstruct->pointer SDL_Event event))
+ event)))