From ce3538d30016de4c6d3839eee1e368b1c27b38f6 Mon Sep 17 00:00:00 2001
From: Ivo van Dongen <info@ivovandongen.nl>
Date: Mon, 17 Jul 2017 20:34:03 +0200
Subject: [macos] fix animations

---
 platform/darwin/src/MGLRendererFrontend.h | 17 +++++++++++++++--
 platform/macos/src/MGLMapView.mm          |  2 +-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/platform/darwin/src/MGLRendererFrontend.h b/platform/darwin/src/MGLRendererFrontend.h
index 5d0c784a4f..839d3be773 100644
--- a/platform/darwin/src/MGLRendererFrontend.h
+++ b/platform/darwin/src/MGLRendererFrontend.h
@@ -1,5 +1,7 @@
 #include <mbgl/renderer/renderer.hpp>
 #include <mbgl/renderer/renderer_frontend.hpp>
+#include <mbgl/util/async_task.hpp>
+#include <mbgl/util/optional.hpp>
 
 
 /**
@@ -9,10 +11,16 @@
 class MGLRenderFrontend : public mbgl::RendererFrontend
 {
 public:
-    MGLRenderFrontend(std::unique_ptr<mbgl::Renderer> renderer_, MGLMapView* nativeView_, mbgl::View* mbglView_)
+    MGLRenderFrontend(std::unique_ptr<mbgl::Renderer> renderer_, MGLMapView* nativeView_, mbgl::View* mbglView_, bool async = false)
         : renderer(std::move(renderer_))
         , nativeView(nativeView_)
         , mbglView(mbglView_) {
+            
+        if (async) {
+            asyncInvalidate.emplace([&]() {
+                [nativeView setNeedsGLDisplay];
+            });
+        }
     }
     
     void reset() override {
@@ -23,7 +31,11 @@ public:
     
     void update(std::shared_ptr<mbgl::UpdateParameters> updateParameters_) override {
         updateParameters = std::move(updateParameters_);
-        [nativeView setNeedsGLDisplay];
+        if (asyncInvalidate) {
+            asyncInvalidate->send();
+        } else {
+            [nativeView setNeedsGLDisplay];
+        }
     }
     
     void setObserver(mbgl::RendererObserver& observer) override {
@@ -51,4 +63,5 @@ private:
     __weak MGLMapView *nativeView = nullptr;
     mbgl::View *mbglView = nullptr;
     std::shared_ptr<mbgl::UpdateParameters> updateParameters;
+    mbgl::optional<mbgl::util::AsyncTask> asyncInvalidate;
 };
diff --git a/platform/macos/src/MGLMapView.mm b/platform/macos/src/MGLMapView.mm
index 65a0864861..10afdc6e5f 100644
--- a/platform/macos/src/MGLMapView.mm
+++ b/platform/macos/src/MGLMapView.mm
@@ -275,7 +275,7 @@ public:
     _mbglThreadPool = mbgl::sharedThreadPool();
 
     auto renderer = std::make_unique<mbgl::Renderer>(*_mbglView, [NSScreen mainScreen].backingScaleFactor, *mbglFileSource, *_mbglThreadPool, mbgl::GLContextMode::Unique);
-    _rendererFrontend = std::make_unique<MGLRenderFrontend>(std::move(renderer), self, _mbglView);
+    _rendererFrontend = std::make_unique<MGLRenderFrontend>(std::move(renderer), self, _mbglView, true);
     _mbglMap = new mbgl::Map(*_rendererFrontend, *_mbglView, self.size, [NSScreen mainScreen].backingScaleFactor, *mbglFileSource, *_mbglThreadPool, mbgl::MapMode::Continuous, mbgl::ConstrainMode::None, mbgl::ViewportMode::Default);
 
     // Install the OpenGL layer. Interface Builder’s synchronous drawing means
-- 
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