Add Text rendering

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

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

@@ -0,0 +1,47 @@
+
+#pragma once
+
+#include <vector>
+#include "GlyphBox.h"
+#include "Workload.h"
+#include "AtlasGenerator.h"
+
+namespace msdf_atlas {
+
+/**
+ * An implementation of AtlasGenerator that uses the specified generator function
+ * and AtlasStorage class and generates glyph bitmaps immediately
+ * (does not return until all submitted work is finished),
+ * but may use multiple threads (setThreadCount).
+ */
+template <typename T, int N, GeneratorFunction<T, N> GEN_FN, class AtlasStorage>
+class ImmediateAtlasGenerator {
+
+public:
+    ImmediateAtlasGenerator();
+    ImmediateAtlasGenerator(int width, int height);
+    void generate(const GlyphGeometry *glyphs, int count);
+    void rearrange(int width, int height, const Remap *remapping, int count);
+    void resize(int width, int height);
+    /// Sets attributes for the generator function
+    void setAttributes(const GeneratorAttributes &attributes);
+    /// Sets the number of threads to be run by generate
+    void setThreadCount(int threadCount);
+    /// Allows access to the underlying AtlasStorage
+    const AtlasStorage & atlasStorage() const;
+    /// Returns the layout of the contained glyphs as a list of GlyphBoxes
+    const std::vector<GlyphBox> & getLayout() const;
+
+private:
+    AtlasStorage storage;
+    std::vector<GlyphBox> layout;
+    std::vector<T> glyphBuffer;
+    std::vector<byte> errorCorrectionBuffer;
+    GeneratorAttributes attributes;
+    int threadCount;
+
+};
+
+}
+
+#include "ImmediateAtlasGenerator.hpp"