Basic Font integration.

src/fonts/IFontEngine.h

@@ -1,8 +1,20 @@
 #pragma once
 
+#include <memory>
+#include <filesystem>
+
+template<typename T>
+class Image;
+
 class IFontEngine
 {
 public:
     IFontEngine() = default;
     virtual ~IFontEngine() = default;
+
+    virtual void initialize(){};
+
+    virtual void loadFontFace(const std::filesystem::path& fontFile, int penSize = 16) = 0;
+
+    virtual std::unique_ptr<Image<unsigned char> > loadGlyph(unsigned charCode) = 0;
 };