Add Text rendering

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

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

@@ -0,0 +1,37 @@
+
+#pragma once
+
+#include <msdfgen.h>
+#include "Remap.h"
+
+namespace msdf_atlas {
+
+namespace {
+
+/** Prototype of an atlas storage class.
+ *  An atlas storage physically holds the pixels of the atlas
+ *  and allows to read and write subsections represented as bitmaps.
+ *  Can be implemented using a simple bitmap (BitmapAtlasStorage),
+ *  as texture memory, or any other way.
+ */
+class AtlasStorage {
+
+public:
+    AtlasStorage();
+    AtlasStorage(int width, int height);
+    /// Creates a copy with different dimensions
+    AtlasStorage(const AtlasStorage &orig, int width, int height);
+    /// Creates a copy with different dimensions and rearranges the pixels according to the remapping array
+    AtlasStorage(const AtlasStorage &orig, int width, int height, const Remap *remapping, int count);
+    /// Stores a subsection at x, y into the atlas storage. May be implemented for only some T, N
+    template <typename T, int N>
+    void put(int x, int y, const msdfgen::BitmapConstRef<T, N> &subBitmap);
+    /// Retrieves a subsection at x, y from the atlas storage. May be implemented for only some T, N
+    template <typename T, int N>
+    void get(int x, int y, const msdfgen::BitmapRef<T, N> &subBitmap) const;
+
+};
+
+}
+
+}