From bc868b8433f47e87bccfae0a52e5387aa8572050 Mon Sep 17 00:00:00 2001
From: "Thiago Marcos P. Santos" <thiago@mapbox.com>
Date: Fri, 28 Apr 2017 16:57:22 +0300
Subject: [PATCH] [core] Suppress "stencil mask overflow" warning

When it starts, we get a log warning for every frame, which is
expensive. Now we get only one warning.
---
 src/mbgl/algorithm/generate_clip_ids_impl.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/mbgl/algorithm/generate_clip_ids_impl.hpp b/src/mbgl/algorithm/generate_clip_ids_impl.hpp
index 59ca66bf6..d63ba27b6 100644
--- a/src/mbgl/algorithm/generate_clip_ids_impl.hpp
+++ b/src/mbgl/algorithm/generate_clip_ids_impl.hpp
@@ -76,8 +76,13 @@ void ClipIDGenerator::update(Renderables& renderables) {
         bit_offset += bit_count;
     }
 
-    if (bit_offset > 8) {
+    // Prevent this warning from firing on every frame,
+    // which can be expensive in some platforms.
+    static bool warned = false;
+
+    if (!warned && bit_offset > 8) {
         Log::Error(Event::OpenGL, "stencil mask overflow");
+        warned = true;
     }
 }