Add window module.

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)))