Add ResourceLoader

openVulkanoCpp/Host/ResourceLoader.cpp

@@ -0,0 +1,76 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "ResourceLoader.hpp"
+#include "Base/Logger.hpp"
+#include <vector>
+
+namespace OpenVulkano
+{
+	class AggregatingResourceLoader final : public ResourceLoader
+	{
+		std::vector<std::unique_ptr<ResourceLoader>> m_loaders;
+
+	public:
+		Array<char> GetResource(const std::string& resourceName) override
+		{
+			for(auto& loader : m_loaders)
+			{
+				try
+				{
+					auto res = loader->GetResource(resourceName);
+					if (!res.Empty()) return res;
+				}
+				catch (const std::exception& e)
+				{
+					Logger::FILESYS->error("Error trying to get resource for '{}'! Error: {}", resourceName, e.what());
+				}
+				catch (...)
+				{
+					Logger::FILESYS->error("Unknown error trying to get resource for '{}'!", resourceName);
+				}
+			}
+			return { 0 };
+		}
+
+		void* Register(std::unique_ptr<ResourceLoader> loader)
+		{
+			m_loaders.push_back(std::move(loader));
+			return m_loaders.back().get();
+		}
+
+		bool Unregister(void* loaderHandle)
+		{
+			for(auto iter = m_loaders.begin(); iter != m_loaders.end(); iter++)
+			{
+				if (iter->get() == loaderHandle)
+				{
+					m_loaders.erase(iter);
+					return true;
+				}
+			}
+			return false;
+		}
+	};
+
+	ResourceLoader& ResourceLoader::GetInstance()
+	{
+		static AggregatingResourceLoader resourceLoader;
+		return resourceLoader;
+	}
+
+	void* ResourceLoader::RegisterResourceLoader(std::unique_ptr<ResourceLoader> loader)
+	{
+		AggregatingResourceLoader* aggregator = static_cast<AggregatingResourceLoader*>(&GetInstance());
+		return aggregator->Register(std::move(loader));
+	}
+
+	bool ResourceLoader::UnregisterResourceLoader(void* loaderHandle)
+	{
+		AggregatingResourceLoader* aggregator = static_cast<AggregatingResourceLoader*>(&GetInstance());
+		return aggregator->Unregister(loaderHandle);
+	}
+}