diff --git a/lib/x11/ext/glx.js b/lib/x11/ext/glx.js
new file mode 100644
index 0000000..277b553
--- /dev/null
+++ b/lib/x11/ext/glx.js
@@ -0,0 +1,11 @@
+/*
+  second extension to try
+  links to get started:
+
+  http://cgit.freedesktop.org/xcb/proto/tree/src/glx.xml?id=HEAD
+  http://cgit.freedesktop.org/mesa/mesa/tree/src/glx
+  http://cgit.freedesktop.org/mesa/mesa/tree/src/glx/indirect.c
+
+  http://www.opengl.org/wiki/Tutorial:_OpenGL_3.0_Context_Creation_(GLX)
+
+*/
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