Cleanup & refactor

src/demo/sky_quad.h

@@ -5,11 +5,6 @@
 #include "engine/animatable.h"
 #include "engine/animator.h"
 
-#include <array>
-#include <memory>
-#include <string>
-#include <vector>
-
 namespace eng {
 class Shader;
 }  // namespace eng

src/engine/engine.cc

@@ -276,14 +276,8 @@ void Engine::SetImageSource(const std::string& asset_name,
     return;
   }
 
-  auto& t = textures_[asset_name] = {CreateRenderResource<Texture>(),
+  textures_[asset_name] = {std::make_unique<Texture>(renderer_.get()),
-                                     create_image, persistent, 0};
+                           create_image, persistent, 0};
-
-  if (persistent) {
-    auto image = create_image();
-    if (image)
-      t.texture->Update(std::move(image));
-  }
 }
 
 void Engine::RefreshImage(const std::string& asset_name) {
@@ -297,8 +291,6 @@ void Engine::RefreshImage(const std::string& asset_name) {
     auto image = it->second.create_image();
     if (image)
       it->second.texture->Update(std::move(image));
-    else
-      it->second.texture->Destroy();
   }
 }
 
@@ -310,8 +302,11 @@ Texture* Engine::AcquireTexture(const std::string& asset_name) {
   }
 
   it->second.use_count++;
-  if (!it->second.texture->IsValid())
+  if (!it->second.texture->IsValid()) {
-    RefreshImage(it->first);
+    auto image = it->second.create_image();
+    if (image)
+      it->second.texture->Update(std::move(image));
+  }
   return it->second.texture.get();
 }
 
@@ -335,7 +330,8 @@ void Engine::LoadCustomShader(const std::string& asset_name,
     return;
   }
 
-  auto& s = shaders_[asset_name] = {CreateRenderResource<Shader>(), file_name};
+  auto& s = shaders_[asset_name] = {std::make_unique<Shader>(renderer_.get()),
+                                    file_name};
 
   auto source = std::make_unique<ShaderSource>();
   if (!source->Load(file_name))
@@ -623,7 +619,11 @@ void Engine::ContextLost() {
 
   for (auto& t : textures_) {
     t.second.texture->SetRenderer(renderer_.get());
-    RefreshImage(t.first);
+    if (t.second.persistent || t.second.use_count > 0) {
+      auto image = t.second.create_image();
+      if (image)
+        t.second.texture->Update(std::move(image));
+    }
   }
 
   for (auto& s : shaders_) {

src/engine/engine.h

@@ -61,11 +61,6 @@ class Engine : public PlatformObserver {
   // Convert position form pixels to viewport coordinates.
   base::Vector2f ToPosition(const base::Vector2f& vec);
 
-  template <typename T>
-  std::unique_ptr<T> CreateRenderResource() {
-    return std::unique_ptr<T>(static_cast<T*>(new T(renderer_.get())));
-  }
-
   void SetImageSource(const std::string& asset_name,
                       const std::string& file_name,
                       bool persistent = false);

src/engine/image_quad.cc

@@ -32,7 +32,6 @@ void ImageQuad::Create(const std::string& asset_name,
   asset_name_ = asset_name;
 }
 
-// TODO: typo
 void ImageQuad::Destroy() {
   if (texture_) {
     Engine::Get().ReleaseTexture(asset_name_);