tried making naming more uniform and implemented most of the opengl managers

include/assets/file_parsers/mtl_loader.hpp

@@ -0,0 +1,56 @@
+#pragma once
+
+#include <filesystem>
+#include <system_error>
+
+#include "assets/dynamic_data_store.hpp"
+#include "assets/prefetch_lookup.hpp"
+#include "assets/prefetch_queue.hpp"
+#include "assets/data"
+#include "../data_stores"
+#include "../data_stores"
+#include "util/string_lookup.hpp"
+#include "util/result.hpp"
+
+namespace mtl_loader_error
+{
+enum class codes {
+	ok = 0,
+	cannot_open_file,
+	cannot_open_texture,
+	malformed_ambient_color,
+	malformed_diffuse_color,
+	malformed_specular_color,
+	malformed_specular_exponent,
+	malformed_dissolve,
+	unknown_line_begin
+};
+} // namespace mtl_loader_error
+
+struct mtl_loader
+{
+	static constexpr auto name = std::string_view("mtl");
+
+	[[nodiscard]] static std::error_code prefetch(
+		const file_dir_list& paths,
+		prefetch_queue& queue
+	);
+
+	// THis is not very elegant, but right now I do not see a better solution...
+	[[nodiscard]] static std::error_code load(
+		dynamic_material_library_buffer& material_library_buffer,
+		const file_dir_list& paths,
+		prefetch_lookup& id_lookup,
+		shader_source_store& store,
+		bool pedantic = false
+	);
+
+protected:
+	static void find_textures(
+		std::span<char> buffer,
+		std::filesystem::path& path_buffer,
+		const std::filesystem::path& base_directory,
+		std::ifstream& in,
+		ztu::string_list& texture_filenames
+	);
+};