From 79d2b81eb1d64ceb987154fce871af027227c4de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Sun, 16 Aug 2015 15:44:13 -0700
Subject: [PATCH] GL: Timer query check if result is available.

---
 src/renderer_gl.h | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/renderer_gl.h b/src/renderer_gl.h
index 9e51d7b31..52a85c849 100644
--- a/src/renderer_gl.h
+++ b/src/renderer_gl.h
@@ -1151,13 +1151,21 @@ namespace bgfx { namespace gl
 		{
 			if (0 != m_control.available() )
 			{
-				GL_CHECK(glGetQueryObjectui64v(m_frame[m_control.m_read]
-						, GL_QUERY_RESULT
-						, &m_elapsed
+				GLint available;
+				GL_CHECK(glGetQueryObjectiv(m_frame[m_control.m_read]
+						, GL_QUERY_RESULT_AVAILABLE
+						, &available
 						) );
-				m_control.consume(1);
 
-				return true;
+				if (available)
+				{
+					GL_CHECK(glGetQueryObjectui64v(m_frame[m_control.m_read]
+							, GL_QUERY_RESULT
+							, &m_elapsed
+							) );
+					m_control.consume(1);
+					return true;
+				}
 			}
 
 			return false;