Merging r5975 through r6036 from trunk to ogl-es branch.

GLES drivers adapted, but only did make compile-tests.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/IZBuffer.h

@@ -0,0 +1,47 @@
+// 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
+
+#ifndef __I_Z_BUFFER_H_INCLUDED__
+#define __I_Z_BUFFER_H_INCLUDED__
+
+#include "IReferenceCounted.h"
+#include "dimension2d.h"
+#include "S2DVertex.h"
+
+namespace irr
+{
+namespace video
+{
+	class IZBuffer : public virtual IReferenceCounted
+	{
+	public:
+
+		//! destructor
+		virtual ~IZBuffer() {};
+
+		//! clears the zbuffer
+		virtual void clear() = 0;
+
+		//! sets the new size of the zbuffer
+		virtual void setSize(const core::dimension2d<u32>& size) = 0;
+
+		//! returns the size of the zbuffer
+		virtual const core::dimension2d<u32>& getSize() const = 0;
+
+		//! locks the zbuffer
+		virtual TZBufferType* lock() = 0;
+
+		//! unlocks the zbuffer
+		virtual void unlock() = 0;
+	};
+
+
+	//! creates a ZBuffer
+	IZBuffer* createZBuffer(const core::dimension2d<u32>& size);
+
+} // end namespace video
+} // end namespace irr
+
+#endif
+