Add Roboto font, misc icons and text things

PortabilityLayer/RenderedGlyphMetrics.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace PortabilityLayer
+{
+	struct RenderedGlyphMetrics
+	{
+		size_t m_glyphDataPitch;
+
+		uint32_t m_glyphWidth;
+		uint32_t m_glyphHeight;
+
+		int16_t m_bearingX;
+		int16_t m_bearingY;
+		int16_t m_advanceX;
+	};
+}