From 7cc965f26374c880ba129923438b1e4b39ac8f7e Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Mon, 8 Feb 2016 16:15:45 -0500
Subject: render: framebuffer: Use the null texture within the null
 framebuffer.

* sly/render/framebuffer.scm (null-framebuffer): Set texture to the null
  texture, rather than #f.
---
 sly/render/framebuffer.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sly/render/framebuffer.scm b/sly/render/framebuffer.scm
index e533f7a..ed3f253 100644
--- a/sly/render/framebuffer.scm
+++ b/sly/render/framebuffer.scm
@@ -28,6 +28,7 @@
   #:use-module (gl)
   #:use-module (gl low-level)
   #:use-module (gl enums)
+  #:use-module (sly render texture)
   #:use-module (sly wrappers gl)
   #:export (make-framebuffer
             framebuffer?
@@ -57,7 +58,7 @@
   (texture framebuffer-texture))
 
 (define null-framebuffer
-  (%make-framebuffer 0 0 #f))
+  (%make-framebuffer 0 0 null-texture))
 
 (define (framebuffer-null? framebuffer)
   "Return #t if FRAMEBUFFER is the null framebuffer."
-- 
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