From f7f60d94cba951d9731b288d75ca7c54c2ee53eb Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sun, 11 Oct 2020 23:16:19 -0400
Subject: graphics: Add multisampling support.

---
 chickadee.scm | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'chickadee.scm')

diff --git a/chickadee.scm b/chickadee.scm
index e974b9f..ad018be 100644
--- a/chickadee.scm
+++ b/chickadee.scm
@@ -241,6 +241,8 @@ border is disabled, otherwise it is enabled.")
   (sdl2:set-gl-attribute! 'context-major-version 2)
   (sdl2:set-gl-attribute! 'context-profile-mask 1) ; core profile
   (sdl2:set-gl-attribute! 'stencil-size 8) ; 8-bit stencil buffer
+  (sdl2:set-gl-attribute! 'multisample-buffers 1)
+  (sdl2:set-gl-attribute! 'multisample-samples 4)
   (let* ((window (sdl2:make-window #:opengl? #t
                                    #:title window-title
                                    #:size (list window-width window-height)
@@ -350,6 +352,8 @@ border is disabled, otherwise it is enabled.")
             (lambda args
               (display "warning: could not enable vsync\n"
                        (current-error-port))))
+          ;; Turn off multisampling by default.
+          (gl-disable (version-1-3 multisample))
           (load)
           (sdl2:load-game-controller-mappings!
            (scope-datadir "gamecontrollerdb.txt"))
-- 
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