From 6211db69680e08a1f463ec098ed843ca49a859b2 Mon Sep 17 00:00:00 2001
From: Ivo van Dongen <info@ivovandongen.nl>
Date: Wed, 13 Sep 2017 14:25:03 +0300
Subject: [core] allow context to be abandoned on destruction

- This enables the use case where the system already destroyed the underlying GL resources. Otherwise, the cleanup would fail and crash
---
 src/mbgl/gl/context.cpp | 4 +++-
 src/mbgl/gl/context.hpp | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/mbgl/gl/context.cpp b/src/mbgl/gl/context.cpp
index b8a0502178..d0c538efb0 100644
--- a/src/mbgl/gl/context.cpp
+++ b/src/mbgl/gl/context.cpp
@@ -87,7 +87,9 @@ static_assert(std::is_same<BinaryProgramFormat, GLenum>::value, "OpenGL type mis
 Context::Context() = default;
 
 Context::~Context() {
-    reset();
+    if (cleanupOnDestruction) {
+        reset();
+    }
 }
 
 void Context::initializeExtensions(const std::function<gl::ProcAddress(const char*)>& getProcAddress) {
diff --git a/src/mbgl/gl/context.hpp b/src/mbgl/gl/context.hpp
index 228e6e55b7..528113cbba 100644
--- a/src/mbgl/gl/context.hpp
+++ b/src/mbgl/gl/context.hpp
@@ -190,7 +190,13 @@ public:
         return vertexArray.get();
     }
 
+    void setCleanupOnDestruction(bool cleanup) {
+        cleanupOnDestruction = cleanup;
+    }
+
 private:
+    bool cleanupOnDestruction = true;
+
     std::unique_ptr<extension::Debugging> debugging;
     std::unique_ptr<extension::VertexArray> vertexArray;
 #if MBGL_HAS_BINARY_PROGRAMS
-- 
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