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;;; Sly
;;; Copyright (C) 2013, 2014 David Thompson <dthompson2@worcester.edu>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Window management.
;;
;;; Code:
(define-module (sly window)
#:use-module (ice-9 match)
#:use-module (srfi srfi-9)
#:use-module ((sdl2) #:prefix sdl2:)
#:use-module ((sdl2 events) #:prefix sdl2:)
#:use-module ((sdl2 video) #:prefix sdl2:)
#:use-module (sly event)
#:use-module (sly signal)
#:use-module (sly math transform)
#:use-module (sly math vector)
#:export (make-window
window?
window-title
window-resolution
window-fullscreen?
window-width
window-height
window-size
window-projection
with-window
window-resize-hook
window-close-hook
init-window
swap-window))
(define-record-type <window>
(%make-window title resolution fullscreen?)
window?
(title window-title)
(resolution window-resolution)
(fullscreen? window-fullscreen?))
(define* (make-window #:optional #:key
(title "Untitled")
(resolution (vector2 640 480))
(fullscreen? #f))
(%make-window title resolution fullscreen?))
(define window-resize-hook (make-hook 1))
(register-event-handler
'window-resize
(lambda (e)
(match (sdl2:window-event-vector e)
((width height)
(run-hook window-resize-hook (vector2 width height))))))
(define-signal window-size
(hook->signal window-resize-hook (vector2 0 0) identity))
(define-signal window-width (signal-map vx window-size))
(define-signal window-height (signal-map vy window-size))
(define-signal window-projection
(signal-map (lambda (size)
(if (or (zero? (vx size)) (zero? (vy size)))
identity-transform
(orthographic-projection 0 (vx size) 0 (vy size) -1 1)))
window-size))
(define window-close-hook (make-hook))
(register-event-handler
'quit
(lambda (e)
(run-hook window-close-hook)))
(define %sdl-window #f)
(define %gl-context #f)
(define (init-window)
(set! %sdl-window (sdl2:make-window #:opengl? #t #:show? #t))
(sdl2:set-gl-attribute! 'context-major-version 3)
(sdl2:set-gl-attribute! 'context-minor-version 2)
(sdl2:set-gl-attribute! 'double-buffer 1)
(sdl2:set-gl-attribute! 'depth-size 24)
(set! %gl-context (sdl2:make-gl-context %sdl-window))
(sdl2:set-gl-swap-interval! 'vsync))
(define (open-window window)
(sdl2:sdl-init)
(init-window)
(let ((res (window-resolution window)))
(sdl2:set-window-title! %sdl-window (window-title window))
(sdl2:set-window-size! %sdl-window (list (vx res) (vy res)))
(sdl2:set-window-fullscreen! %sdl-window (window-fullscreen? window))
(sdl2:show-window! %sdl-window)
(signal-set! window-size res)))
(define (close-window)
(sdl2:hide-window! %sdl-window)
(sdl2:sdl-quit))
(define-syntax-rule (with-window window body ...)
(dynamic-wind
(lambda ()
(open-window window))
(lambda () body ...)
close-window))
(define (swap-window)
(sdl2:swap-gl-window %sdl-window))
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