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| -rw-r--r-- | 2d/window.scm | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/2d/window.scm b/2d/window.scm new file mode 100644 index 0000000..02c75c9 --- /dev/null +++ b/2d/window.scm @@ -0,0 +1,46 @@ +;;; 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)) + +(define* (open-window width height #:optional (depth 24)) + "Creates the game window with the specified dimensions and +initializes OpenGL state." + ;; Open SDL window in OpenGL mode. + (SDL:init '(SDL_INIT_VIDEO)) + (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))) |