Add ResourceLoaderAppDirLinux

openVulkanoCpp/Base/Utils.cpp

@@ -28,10 +28,14 @@ namespace OpenVulkano
 #endif
 	}
 
-	Array<char> Utils::ReadFile(const std::string& filePath)
+	Array<char> Utils::ReadFile(const std::string& filePath, bool emptyOnMissing)
 	{
 		std::ifstream file(filePath, std::ios::ate | std::ios::binary);
-		if (!file.is_open())  throw std::runtime_error("Failed to open file '" + filePath + "'!");
+		if (!file.is_open())
+		{
+			if (emptyOnMissing) return { 0 };
+			throw std::runtime_error("Failed to open file '" + filePath + "'!");
+		}
 		const size_t fileSize = static_cast<size_t>(file.tellg());
 		Array<char> data(fileSize);
 		file.seekg(0);

openVulkanoCpp/Base/Utils.hpp

@@ -134,6 +134,6 @@ namespace OpenVulkano
 			else  return {str.substr(0, pos), str.substr(pos + 1)};
 		}
 
-		static Array<char> ReadFile(const std::string& filePath);
+		static Array<char> ReadFile(const std::string& filePath, bool emptyOnMissing = false);
 	};
 }

openVulkanoCpp/Host/Linux/ResourceLoaderAppDirLinux.cpp

@@ -0,0 +1,47 @@
+/*
+ * 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 "ResourceLoaderAppDirLinux.hpp"
+#include "Base/Utils.hpp"
+#include <unistd.h>
+#include <limits.h>
+#include <iostream>
+
+namespace OpenVulkano
+{
+	namespace
+	{
+		void* HANDLE = ResourceLoader::RegisterResourceLoader(std::make_unique<ResourceLoaderAppDirLinux>());
+
+		std::string FindAppDir()
+		{
+			char buffer[PATH_MAX];
+			size_t size;
+			if ((size = readlink("/proc/self/exe", buffer, sizeof(buffer))) != -1)
+			{
+				std::string_view appDirPath(buffer, size);
+				appDirPath = appDirPath.substr(0, appDirPath.find_last_of('/') + 1);
+				return std::string(appDirPath);
+			}
+			else
+			{
+				std::cerr << "Failed to find real path to application!";
+			}
+			return "";
+		}
+
+		const std::string& GetAppDir()
+		{
+			static const std::string appDirPath = FindAppDir();
+			return appDirPath;
+		}
+	}
+
+	Array<char> ResourceLoaderAppDirLinux::GetResource(const std::string& resourceName)
+	{
+		return Utils::ReadFile(GetAppDir() + resourceName);
+	}
+}

openVulkanoCpp/Host/Linux/ResourceLoaderAppDirLinux.hpp

@@ -0,0 +1,18 @@
+/*
+ * 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/.
+ */
+
+#pragma once
+
+#include "Host/ResourceLoader.hpp"
+
+namespace OpenVulkano
+{
+	class ResourceLoaderAppDirLinux final : public ResourceLoader
+	{
+	public:
+		Array<char> GetResource(const std::string& resourceName) override;
+	};
+}