Engine core and assets loading refactor

src/AssetsLoader.h

@@ -0,0 +1,38 @@
+#ifndef SRC_ASSETS_LOADER_H
+#define SRC_ASSETS_LOADER_H
+
+#include <string>
+#include <functional>
+#include <map>
+#include <queue>
+
+#define ASSET_TEXTURE 1
+#define ASSET_SHADER 2
+#define ASSET_FONT 3
+
+class Assets;
+
+typedef std::function<bool(Assets*, const std::string&, const std::string&)> aloader_func;
+
+struct aloader_entry {
+	int tag;
+	const std::string filename;
+	const std::string alias;
+};
+
+class AssetsLoader {
+	Assets* assets;
+	std::map<int, aloader_func> loaders;
+	std::queue<aloader_entry> entries;
+public:
+	AssetsLoader(Assets* assets);
+	void addLoader(int tag, aloader_func func);
+	void add(int tag, const std::string filename, const std::string alias);
+
+	bool hasNext() const;
+	bool loadNext();
+
+	static void createDefaults(AssetsLoader& loader);
+};
+
+#endif // SRC_ASSETS_LOADER_H