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+;;; Chickadee Game Toolkit
+;;; Copyright © 2016 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee 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.
+;;;
+;;; Chickadee 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/>.
+
+(define-module (chickadee window)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-9)
+ #:use-module ((sdl2) #:prefix sdl2:)
+ #:use-module ((sdl2 events) #:prefix sdl2:)
+ #:use-module ((sdl2 video) #:prefix sdl2:)
+ #:export (open-window
+ close-window
+ window?
+ window-title
+ window-width
+ window-height
+ window-fullscreen?
+ with-window
+ swap-buffers))
+
+(define-record-type <window>
+ (make-window sdl-window gl-context)
+ window?
+ (sdl-window unwrap-window)
+ (gl-context window-gl-context))
+
+(define* (open-window #:key
+ (title "Chickadee")
+ (width 640)
+ (height 480)
+ fullscreen?)
+ (sdl2:set-gl-attribute! 'context-major-version 3)
+ (sdl2:set-gl-attribute! 'context-minor-version 3)
+ (sdl2:set-gl-attribute! 'double-buffer 1)
+ (sdl2:set-gl-attribute! 'depth-size 24)
+ (sdl2:set-gl-attribute! 'red-size 8)
+ (sdl2:set-gl-attribute! 'green-size 8)
+ (sdl2:set-gl-attribute! 'blue-size 8)
+ (sdl2:set-gl-attribute! 'alpha-size 8)
+ (sdl2:set-gl-attribute! 'stencil-size 8)
+ (sdl2:set-gl-attribute! 'retained-backing 0)
+ (sdl2:set-gl-attribute! 'framebuffer-srgb-capable 1)
+ (let* ((sdl-window (sdl2:make-window #:opengl? #t
+ #:title title
+ #:size (list width height)
+ #:fullscreen? fullscreen?))
+ (gl-context (sdl2:make-gl-context sdl-window))
+ (window (make-window sdl-window gl-context)))
+ (sdl2:set-gl-swap-interval! 'vsync)
+ window))
+
+(define (close-window! window)
+ "Close WINDOW."
+ (sdl2:delete-gl-context! (window-gl-context window))
+ (sdl2:close-window! (unwrap-window window)))
+
+(define (window-title window)
+ "Return the title of WINDOW."
+ (sdl2:window-title (unwrap-window window)))
+
+(define (set-window-title! window title)
+ "Set TITLE for WINDOW."
+ (sdl2:set-window-title! (unwrap-window window) title))
+
+(define (set-window-size! window width height)
+ (sdl2:set-window-size! (unwrap-window window) (list width height)))
+
+(define-syntax-rule (with-window window body ...)
+ (dynamic-wind
+ (const #t)
+ (lambda () body ...)
+ (lambda ()
+ (close-window! window))))
+
+(define (swap-buffers window)
+ (sdl2:swap-gl-window (unwrap-window window)))