From 636fedff122dc254ec77ea5504cf8d94acd8b351 Mon Sep 17 00:00:00 2001
From: Mike Morris <michael.patrick.morris@gmail.com>
Date: Wed, 10 Sep 2014 14:24:29 -0400
Subject: [PATCH] make context active before clearing buffers

---
 common/headless_view.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/common/headless_view.cpp b/common/headless_view.cpp
index f790d90ce..0fce22398 100644
--- a/common/headless_view.cpp
+++ b/common/headless_view.cpp
@@ -113,6 +113,8 @@ void HeadlessView::resize(int width, int height) {
 }
 
 void HeadlessView::clear_buffers() {
+    make_active();
+
 #if MBGL_USE_CGL
     glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);