summaryrefslogtreecommitdiff
path: root/2d/window.scm
blob: 176d867b5eb6e64cd7c25f0d78a2d52b9dd2d9d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
;;; guile-2d
;;; Copyright (C) 2013 David Thompson <dthompson2@worcester.edu>
;;;
;;; Guile-2d is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU Lesser General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; Guile-2d 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
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this program.  If not, see
;;; <http://www.gnu.org/licenses/>.

;;; Commentary:
;;
;; Window management.
;;
;;; Code:

(define-module (2d window)
  #:use-module (srfi srfi-9)
  #:use-module (figl gl)
  #:use-module ((sdl sdl) #:prefix SDL:)
  #:use-module ((sdl mixer) #:prefix SDL:)
  #:use-module (2d event)
  #:use-module (2d signals)
  #:use-module (2d transform)
  #:use-module (2d vector2)
  #:export (<window>
            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 "Guile-2D Window")
                      (resolution (vector2 640 480))
                      (fullscreen? #f))
  (%make-window title resolution fullscreen?))

(define window-width (make-root-signal 0))
(define window-height (make-root-signal 0))
(define window-size (signal-map vector2 window-width window-height))
(define 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-resize-hook (make-hook 2))
(define window-close-hook (make-hook))

(register-event-handler
 'video-resize
 (lambda (e)
   (run-hook window-resize-hook
             (SDL:event:resize:w e)
             (SDL:event:resize:h e))
   (signal-set! window-width (SDL:event:resize:w e))
   (signal-set! window-height (SDL:event:resize:h e))))

(register-event-handler
 'quit
 (lambda (e)
   (run-hook window-close-hook)))

(define* (open-window window)
  "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-width width)
    (signal-set! window-height height)
    ;; Initialize everything
    (SDL:enable-unicode #t)
    (SDL:init 'everything)
    ;; Open SDL window in OpenGL mode.
    (SDL:set-video-mode width height 24 flags)
    (SDL:set-caption (window-title window))
    ;; Enable texturing and alpha blending
    (gl-enable (enable-cap texture-2d))
    (gl-enable (enable-cap blend))
    (set-gl-blend-function (blending-factor-src src-alpha)
                           (blending-factor-dest one-minus-src-alpha))))

(define (close-window)
  "Close the currently open window and audio."
  (SDL:quit))

(define-syntax-rule (with-window window body ...)
  (dynamic-wind
    (lambda () (open-window window))
    (lambda () body ...)
    (lambda () (close-window))))

;; Open a window immediately to create an OpenGL context. This allows
;; for textures to be loaded before the program explicitly sets the
;; window settings.
;;
;; TODO: Hide the window initially. This will require SDL 2.0.
(open-window (make-window #:title ""))