Fixed debug marker extension check.

src/renderer_gl.cpp

@@ -1401,14 +1401,16 @@ namespace bgfx
 			}
 #endif // BGFX_CONFIG_RENDERER_OPENGL
 
-			if (NULL == glFrameTerminatorGREMEDY)
+			if (NULL == glFrameTerminatorGREMEDY
+			||  !s_extension[Extension::GREMEDY_frame_terminator].m_supported)
 			{
 				glFrameTerminatorGREMEDY = stubFrameTerminatorGREMEDY;
 			}
 
-			if (NULL == glInsertEventMarker)
+			if (NULL == glInsertEventMarker
+			||  !s_extension[Extension::EXT_debug_marker].m_supported)
 			{
-				glInsertEventMarker = NULL != glStringMarkerGREMEDY
+				glInsertEventMarker = (NULL != glStringMarkerGREMEDY && s_extension[Extension::GREMEDY_string_marker].m_supported)
 					? stubInsertEventMarkerGREMEDY
 					: stubInsertEventMarker
 					;
@@ -3296,7 +3298,7 @@ namespace bgfx
 
 	void Context::rendererSetMarker(const char* _marker, uint32_t _size)
 	{
-		GL_CHECK_I(glInsertEventMarker(_size, _marker) );
+		GL_CHECK(glInsertEventMarker(_size, _marker) );
 	}
 
 	void Context::rendererSubmit()
@@ -3393,7 +3395,7 @@ namespace bgfx
 					currentState.m_flags = newFlags;
 					currentState.m_stencil = newStencil;
 
-					GL_CHECK_I(glInsertEventMarker(0, s_viewName[key.m_view]) );
+					GL_CHECK(glInsertEventMarker(0, s_viewName[key.m_view]) );
 
 					view = key.m_view;
 					programIdx = invalidHandle;
@@ -4233,7 +4235,7 @@ namespace bgfx
 			m_textVideoMemBlitter.blit(m_render->m_textVideoMem);
 		}
 
-		GL_CHECK_I(glFrameTerminatorGREMEDY() );
+		GL_CHECK(glFrameTerminatorGREMEDY() );
 	}
 }