From 6fa9d36005c0d27470678b5c6edd4e61e44813d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Mon, 28 Jul 2014 23:04:52 +0200
Subject: [PATCH] TextureTools: const is available since GLSL 4.20.

---
 src/Magnum/TextureTools/DistanceFieldShader.frag | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Magnum/TextureTools/DistanceFieldShader.frag b/src/Magnum/TextureTools/DistanceFieldShader.frag
index b82c6d94b..1224b7f72 100644
--- a/src/Magnum/TextureTools/DistanceFieldShader.frag
+++ b/src/Magnum/TextureTools/DistanceFieldShader.frag
@@ -26,10 +26,13 @@
 #ifndef NEW_GLSL
 #define in varying
 #define value gl_FragColor.x
-#define const
 #define texture texture2D
 #endif
 
+#ifndef RUNTIME_CONST
+#define const
+#endif
+
 #if (defined(GL_ES) && __VERSION__ >= 300) || (!defined(GL_ES) && __VERSION__ >= 150)
 #define TEXELFETCH_USABLE
 #endif