Add Text rendering

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

CopiumEngine/ext/include/msdfgen/core/EdgeHolder.h

@@ -0,0 +1,41 @@
+
+#pragma once
+
+#include "edge-segments.h"
+
+namespace msdfgen {
+
+/// Container for a single edge of dynamic type.
+class EdgeHolder {
+
+public:
+    /// Swaps the edges held by a and b.
+    static void swap(EdgeHolder &a, EdgeHolder &b);
+
+    EdgeHolder();
+    EdgeHolder(EdgeSegment *segment);
+    EdgeHolder(Point2 p0, Point2 p1, EdgeColor edgeColor = WHITE);
+    EdgeHolder(Point2 p0, Point2 p1, Point2 p2, EdgeColor edgeColor = WHITE);
+    EdgeHolder(Point2 p0, Point2 p1, Point2 p2, Point2 p3, EdgeColor edgeColor = WHITE);
+    EdgeHolder(const EdgeHolder &orig);
+#ifdef MSDFGEN_USE_CPP11
+    EdgeHolder(EdgeHolder &&orig);
+#endif
+    ~EdgeHolder();
+    EdgeHolder & operator=(const EdgeHolder &orig);
+#ifdef MSDFGEN_USE_CPP11
+    EdgeHolder & operator=(EdgeHolder &&orig);
+#endif
+    EdgeSegment & operator*();
+    const EdgeSegment & operator*() const;
+    EdgeSegment * operator->();
+    const EdgeSegment * operator->() const;
+    operator EdgeSegment *();
+    operator const EdgeSegment *() const;
+
+private:
+    EdgeSegment *edgeSegment;
+
+};
+
+}