worked on obj and mtl prefetching nad parsing

include/assets/data_loaders/mtl_loader.hpp

@@ -12,30 +12,25 @@
 #include "util/string_lookup.hpp"
 #include "util/result.hpp"
 
-namespace mtl_loader_error {
-
+namespace mtl_loader_error
+{
 enum class codes {
 	ok = 0,
-	mtl_cannot_open_file,
-	mtl_cannot_open_texture,
-	mtl_malformed_ambient_color,
-	mtl_malformed_diffuse_color,
-	mtl_malformed_specular_color,
-	mtl_malformed_specular_exponent,
-	mtl_malformed_dissolve,
-	mlt_unknown_line_begin
+	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
 
-class mtl_loader {
-public:
+struct mtl_loader
+{
 	static constexpr auto name = std::string_view("mtl");
 
-	std::optional<dynamic_material_store::id_type> find_id(std::string_view name);
-
-	void clear_name_lookup();
-
 	[[nodiscard]] static std::error_code prefetch(
 		const file_dir_list& paths,
 		prefetch_queue& queue
@@ -50,7 +45,12 @@ public:
 		bool pedantic = false
 	);
 
-
-private:
-	ztu::string_lookup<dynamic_material_store::id_type> m_id_lookup;
+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
+	);
 };