Add Text rendering

- Add FreeType as dependency
- Add MsdfGen as dependency
- Add MsdfAtlasGen as dependency

CopiumEngine/ext/include/msdf-atlas-gen/BitmapAtlasStorage.h

@@ -0,0 +1,33 @@
+
+#pragma once
+
+#include "AtlasStorage.h"
+
+namespace msdf_atlas {
+
+/// An implementation of AtlasStorage represented by a bitmap in memory (msdfgen::Bitmap)
+template <typename T, int N>
+class BitmapAtlasStorage {
+
+public:
+    BitmapAtlasStorage();
+    BitmapAtlasStorage(int width, int height);
+    explicit BitmapAtlasStorage(const msdfgen::BitmapConstRef<T, N> &bitmap);
+    explicit BitmapAtlasStorage(msdfgen::Bitmap<T, N> &&bitmap);
+    BitmapAtlasStorage(const BitmapAtlasStorage<T, N> &orig, int width, int height);
+    BitmapAtlasStorage(const BitmapAtlasStorage<T, N> &orig, int width, int height, const Remap *remapping, int count);
+    operator msdfgen::BitmapConstRef<T, N>() const;
+    operator msdfgen::BitmapRef<T, N>();
+    operator msdfgen::Bitmap<T, N>() &&;
+    template <typename S>
+    void put(int x, int y, const msdfgen::BitmapConstRef<S, N> &subBitmap);
+    void get(int x, int y, const msdfgen::BitmapRef<T, N> &subBitmap) const;
+
+private:
+    msdfgen::Bitmap<T, N> bitmap;
+
+};
+
+}
+
+#include "BitmapAtlasStorage.hpp"