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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 (srfi srfi-9)
#:use-module ((sdl sdl) #:prefix SDL:)
#:use-module ((sdl mixer) #:prefix SDL:)
#: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
open-window
close-window
with-window
window-resize-hook
window-close-hook))
(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 "Sly Window")
(resolution (vector2 640 480))
(fullscreen? #f))
(%make-window title resolution fullscreen?))
(define window-resize-hook (make-hook 2))
(register-event-handler
'video-resize
(lambda (e)
(let ((width (SDL:event:resize:w e))
(height (SDL:event:resize:h e)))
;; Reset video mode.
(SDL:set-video-mode width height 24 '(opengl))
(run-hook window-resize-hook width height))))
(define-signal window-size
(hook->signal window-resize-hook
(vector2 0 0)
vector2))
(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* (open-window #:optional (window (make-window #:title "")))
"Open the game window using the settings in WINDOW."
(let ((flags (if (window-fullscreen? window) '(opengl fullscreen) 'opengl))
(width (vx (window-resolution window)))
(height (vy (window-resolution window))))
(signal-set! window-size (vector2 width height))
;; Initialize everything
(SDL:enable-unicode #t)
(SDL:init 'everything)
;; Open SDL window in OpenGL mode.
(unless (SDL:set-video-mode width height 24 flags)
(error "Failed to open window:" width height flags))
(SDL:set-caption (window-title window))))
(define (close-window)
"Close the currently open window."
(SDL:quit))
(define-syntax-rule (with-window window body ...)
(dynamic-wind
(lambda () (open-window window))
(lambda () body ...)
(lambda () (close-window))))
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