Add FontResolver

openVulkanoCpp/Host/FontResolver.cpp

@@ -0,0 +1,46 @@
+/*
+ * 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 "FontResolver.hpp"
+#include "Base/Utils.hpp"
+#include "ResourceLoader.hpp"
+#include "SystemFontResolver.hpp"
+#include "fmt/format.h"
+#include <array>
+#include <string_view>
+#include <filesystem>
+
+namespace OpenVulkano
+{
+	namespace
+	{
+		static constexpr std::array<std::string_view, 1> FONT_EXTENSIONS = { ".ttf" };
+		static constexpr std::array<std::string_view, 1> FONT_POSTFIXES = { "-Regular" };
+
+		static constexpr std::array<std::string_view, 3> FONT_FILE_CHECKS = { "", FONT_EXTENSIONS[0], "-Regular.ttf" }; // TODO automate
+	}
+
+	Array<char> FontResolver::GetFontData(const std::string& fontName, bool checkSystemFonts)
+	{
+		Array<char> data;
+		for (const auto& ext : FONT_FILE_CHECKS)
+		{
+			std::string fName = fmt::format("{}{}", fontName, ext);
+			data = ResourceLoader::GetInstance().GetResource(fName);
+			if (!data.Empty()) return data;
+			if (std::filesystem::exists(fName))
+			{
+				data = Utils::ReadFile(fName, true);
+				if (!data.Empty()) return data;
+			}
+		}
+		if (checkSystemFonts)
+		{
+			data = Utils::ReadFile(SystemFontResolver::GetSystemFontPath(fontName), true);
+		}
+		return data;
+	}
+}