From b6d56ad634e2b3048e97bedd9f674aa4ec975453 Mon Sep 17 00:00:00 2001
From: Ivo van Dongen <info@ivovandongen.nl>
Date: Fri, 23 Jun 2017 16:05:08 -0700
Subject: [ios][macos] rendering interface changes

---
 platform/darwin/src/MGLRendererFrontend.h | 67 +++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 platform/darwin/src/MGLRendererFrontend.h

(limited to 'platform/darwin/src/MGLRendererFrontend.h')

diff --git a/platform/darwin/src/MGLRendererFrontend.h b/platform/darwin/src/MGLRendererFrontend.h
new file mode 100644
index 0000000000..839d3be773
--- /dev/null
+++ b/platform/darwin/src/MGLRendererFrontend.h
@@ -0,0 +1,67 @@
+#include <mbgl/renderer/renderer.hpp>
+#include <mbgl/renderer/renderer_frontend.hpp>
+#include <mbgl/util/async_task.hpp>
+#include <mbgl/util/optional.hpp>
+
+
+/**
+ The RenderFrontend is passed to the Map to facilitate rendering in a platform
+ dependent way.
+ */
+class MGLRenderFrontend : public mbgl::RendererFrontend
+{
+public:
+    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 {
+        if (renderer) {
+            renderer.reset();
+        }
+    }
+    
+    void update(std::shared_ptr<mbgl::UpdateParameters> updateParameters_) override {
+        updateParameters = std::move(updateParameters_);
+        if (asyncInvalidate) {
+            asyncInvalidate->send();
+        } else {
+            [nativeView setNeedsGLDisplay];
+        }
+    }
+    
+    void setObserver(mbgl::RendererObserver& observer) override {
+        if (!renderer) return;
+        renderer->setObserver(&observer);
+    }
+    
+    void render() {
+        if (!renderer || !updateParameters) return;
+        
+        renderer->render(*mbglView, *updateParameters);
+    }
+    
+    mbgl::Renderer* getRenderer() {
+        return renderer.get();
+    }
+    
+    void onLowMemory() {
+        if (!renderer)  return;
+        renderer->onLowMemory();
+    }
+    
+private:
+    std::unique_ptr<mbgl::Renderer> renderer;
+    __weak MGLMapView *nativeView = nullptr;
+    mbgl::View *mbglView = nullptr;
+    std::shared_ptr<mbgl::UpdateParameters> updateParameters;
+    mbgl::optional<mbgl::util::AsyncTask> asyncInvalidate;
+};
-- 
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