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;;; 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 (figl gl)
#:use-module ((sdl sdl) #:prefix SDL:)
#:export (open-window
close-window))
(define* (open-window width height #:optional (depth 24))
"Creates the game window with the specified dimensions and
initializes OpenGL state."
(SDL:init '(SDL_INIT_VIDEO))
;; Enable unicode key events
(SDL:enable-unicode #t)
;; Open SDL window in OpenGL mode.
(SDL:set-video-mode width height 24 '(SDL_OPENGL))
;; Initialize OpenGL orthographic view
(gl-viewport 0 0 width height)
(set-gl-matrix-mode (matrix-mode projection))
(gl-load-identity)
(gl-ortho 0 width height 0 -1 1)
(set-gl-matrix-mode (matrix-mode modelview))
(gl-load-identity)
;; 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)
"Closes the game window and cleans up. This procedure is typically
called just before calling (quit)."
(SDL:quit))
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