Add a function to calculate the normalmap from a regular texture.

[simgear.git] / simgear / screen / extensions.hxx

diff --git a/simgear/screen/extensions.hxx b/simgear/screen/extensions.hxx
index 30f63e214ac2a112ba33d574113e20fe624626b3..4b9046a0c1e6316996d260cef51190924b5670de 100644 (file)
--- a/simgear/screen/extensions.hxx
+++ b/simgear/screen/extensions.hxx
@@ -36,7 +36,9 @@
 # include <dlfcn.h>
 #endif
 
-#include <GL/gl.h>
+#include <simgear/compiler.h>
+
+#include SG_GL_H
 
 
 #if defined(__cplusplus)