Split CIndexBuffer from CMeshBuffer

irr/include/CIndexBuffer.h

@@ -0,0 +1,89 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#pragma once
+
+#include <vector>
+#include "IIndexBuffer.h"
+
+namespace irr
+{
+namespace scene
+{
+//! Template implementation of the IIndexBuffer interface
+template <class T>
+class CIndexBuffer : public IIndexBuffer
+{
+public:
+	//! Default constructor for empty buffer
+	CIndexBuffer()
+	{
+#ifdef _DEBUG
+		setDebugName("CIndexBuffer");
+#endif
+	}
+
+	video::E_INDEX_TYPE getType() const
+	{
+		static_assert(sizeof(T) == 2 || sizeof(T) == 4, "invalid index type");
+		return sizeof(T) == 2 ? video::EIT_16BIT : video::EIT_32BIT;
+	}
+
+	const void *getData() const override
+	{
+		return Data.data();
+	}
+
+	void *getData() override
+	{
+		return Data.data();
+	}
+
+	u32 getCount() const override
+	{
+		return static_cast<u32>(Data.size());
+	}
+
+	E_HARDWARE_MAPPING getHardwareMappingHint() const override
+	{
+		return MappingHint;
+	}
+
+	void setHardwareMappingHint(E_HARDWARE_MAPPING NewMappingHint) override
+	{
+		MappingHint = NewMappingHint;
+	}
+
+	void setDirty() override
+	{
+		++ChangedID;
+	}
+
+	u32 getChangedID() const override { return ChangedID; }
+
+	void setHWBuffer(void *ptr) const override
+	{
+		HWBuffer = ptr;
+	}
+
+	void *getHWBuffer() const override
+	{
+		return HWBuffer;
+	}
+
+	u32 ChangedID = 1;
+
+	//! hardware mapping hint
+	E_HARDWARE_MAPPING MappingHint = EHM_NEVER;
+	mutable void *HWBuffer = nullptr;
+
+	//! Indices of this buffer
+	std::vector<T> Data;
+};
+
+//! Standard 16-bit buffer
+typedef CIndexBuffer<u16> SIndexBuffer;
+
+} // end namespace scene
+} // end namespace irr