Fix for crash in renderer

src/engine/engine.cc

@@ -73,6 +73,17 @@ void Engine::Run() {
   float frame_frac = 0.0f;
 
   for (;;) {
+    TaskRunner::GetThreadLocalTaskRunner()->SingleConsumerRun();
+
+    platform_->Update();
+    if (platform_->should_exit())
+      return;
+
+    if (!renderer_->IsInitialzed()) {
+      timer_.Reset();
+      continue;
+    }
+
     Draw(frame_frac);
 
     // Accumulate time.
@@ -81,13 +92,8 @@ void Engine::Run() {
 
     // Subdivide the frame time using fixed time steps.
     while (accumulator >= time_step_) {
-      TaskRunner::GetThreadLocalTaskRunner()->SingleConsumerRun();
-      platform_->Update();
       Update(time_step_);
       accumulator -= time_step_;
-
-      if (platform_->should_exit())
-        return;
     };
 
     // Calculate frame fraction from remainder of the frame time.

src/engine/engine.h

@@ -199,7 +199,6 @@ class Engine : public PlatformObserver {
   int fps_ = 0;
 
   float seconds_accumulated_ = 0.0f;
-
   float time_step_ = 1.0f / 60.0f;
   size_t tick_ = 0;
 

src/engine/renderer/opengl/renderer_opengl.cc

@@ -53,6 +53,8 @@ RendererOpenGL::~RendererOpenGL() {
 }
 
 void RendererOpenGL::Shutdown() {
+  is_initialized_ = false;
+
 #ifdef THREADED_RENDERING
   if (terminate_render_thread_)
     return;
@@ -313,6 +315,8 @@ bool RendererOpenGL::InitCommon() {
 
   glClearColor(0, 0, 0, 1);
 
+  is_initialized_ = true;
+
   return true;
 }
 

src/engine/renderer/opengl/renderer_opengl.h

@@ -40,9 +40,11 @@ class RendererOpenGL final : public Renderer {
   RendererOpenGL(base::Closure context_lost_cb);
   ~RendererOpenGL() final;
 
-  virtual bool Initialize(Platform* platform) final;
+  bool Initialize(Platform* platform) final;
   void Shutdown() final;
 
+  bool IsInitialzed() const final { return is_initialized_; }
+
   uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) final;
   void DestroyGeometry(uint64_t resource_id) final;
   void Draw(uint64_t resource_id) final;
@@ -124,6 +126,8 @@ class RendererOpenGL final : public Renderer {
   bool vertex_array_objects_ = false;
   bool npot_ = false;
 
+  bool is_initialized_ = false;
+
 #ifdef THREADED_RENDERING
   // Global commands are independent from frames and guaranteed to be processed.
   std::deque<std::unique_ptr<RenderCommand>> global_commands_;

src/engine/renderer/renderer.h

@@ -26,6 +26,8 @@ class Renderer {
   virtual bool Initialize(Platform* platform) = 0;
   virtual void Shutdown() = 0;
 
+  virtual bool IsInitialzed() const = 0;
+
   virtual uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) = 0;
   virtual void DestroyGeometry(uint64_t resource_id) = 0;
   virtual void Draw(uint64_t resource_id) = 0;

src/engine/renderer/vulkan/renderer_vulkan.h

@@ -23,9 +23,11 @@ class RendererVulkan final : public Renderer {
   RendererVulkan(base::Closure context_lost_cb);
   ~RendererVulkan() final;
 
-  virtual bool Initialize(Platform* platform) final;
+  bool Initialize(Platform* platform) final;
   void Shutdown() final;
 
+  bool IsInitialzed() const final { return device_ != VK_NULL_HANDLE; }
+
   uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) final;
   void DestroyGeometry(uint64_t resource_id) final;
   void Draw(uint64_t resource_id) final;