From 9955508da118dac4948da7e6ef4c555f12aa82c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Mon, 16 Nov 2015 21:31:27 -0800
Subject: [PATCH] GL: Check if occlusion query functions are found.

---
 src/renderer_gl.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/renderer_gl.cpp b/src/renderer_gl.cpp
index 5650f4795..a61cd89d9 100644
--- a/src/renderer_gl.cpp
+++ b/src/renderer_gl.cpp
@@ -1824,6 +1824,13 @@ namespace bgfx { namespace gl
 				|| s_extension[Extension::NV_occlusion_query         ].m_supported
 				;
 
+			m_occlusionQuerySupport &= true
+				&& NULL != glGenQueries
+				&& NULL != glDeleteQueries
+				&& NULL != glBeginQuery
+				&& NULL != glEndQuery
+				;
+
 			g_caps.supported |= m_occlusionQuerySupport
 				? BGFX_CAPS_OCCLUSION_QUERY
 				: 0