Add Roboto font, misc icons and text things

GpCommon/GpRingBuffer.h

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+#pragma once
+
+#include <stdint.h>
+#include <assert.h>
+
+#include "GpCoreDefs.h"
+
+template<class TItem, size_t TCapacity>
+class GpRingBuffer
+{
+public:
+	GpRingBuffer()
+		: m_Size(0)
+		, m_Start(0)
+	{
+	}
+
+	TItem &operator[](size_t index)
+	{
+		assert(index < m_Size);
+		return m_Items[(m_Start + index) % TCapacity];
+	}
+
+	void RemoveFromStart()
+	{
+		assert(m_Size >= 1);
+		m_Start = (m_Start + 1) % TCapacity;
+		m_Size--;
+	}
+
+	void RemoveFromEnd()
+	{
+		assert(m_Size >= 1);
+		m_Size--;
+	}
+
+	void Clear()
+	{
+		m_Size = 0;
+		m_Start = 0;
+	}
+
+	size_t Size() const
+	{
+		return m_Size;
+	}
+
+	TItem *Append()
+	{
+		if (m_Size == TCapacity)
+			return nullptr;
+
+		m_Size++;
+		return &m_Items[(m_Start + (m_Size - 1)) % TCapacity];
+	}
+
+	static const size_t CAPACITY = TCapacity;
+
+private:
+	TItem m_Items[TCapacity];
+	size_t m_Size;
+	size_t m_Start;
+};