From 9038d66af60bca616d0f34cda593409daa06271c Mon Sep 17 00:00:00 2001
From: Bruno de Oliveira Abinader <bruno@mapbox.com>
Date: Sat, 18 Jun 2016 12:03:19 +0300
Subject: [PATCH] [core] Added missing BlendFunc operator

---
 include/mbgl/gl/gl_values.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/mbgl/gl/gl_values.hpp b/include/mbgl/gl/gl_values.hpp
index 03ae46a60..34932dd40 100644
--- a/include/mbgl/gl/gl_values.hpp
+++ b/include/mbgl/gl/gl_values.hpp
@@ -210,6 +210,10 @@ struct BlendFunc {
     }
 };
 
+constexpr bool operator!=(const BlendFunc::Type& a, const BlendFunc::Type& b) {
+    return a.sfactor != b.sfactor || a.dfactor != b.dfactor;
+}
+
 struct Program {
     using Type = GLuint;
     static const Type Default;