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

include/IMemoryReadFile.h

@@ -0,0 +1,31 @@
+// Copyright Michael Zeilfelder
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#ifndef __I_MEMORY_READ_FILE_H_INCLUDED__
+#define __I_MEMORY_READ_FILE_H_INCLUDED__
+
+#include "IReadFile.h"
+
+namespace irr
+{
+namespace io
+{
+
+	//! Interface providing read access to a memory read file.
+	class IMemoryReadFile : public IReadFile
+	{
+	public:
+		//! Get direct access to internal buffer of memory block used as file.
+		/** It's usually better to use the IReadFile functions to access
+		the file content. But as that buffer exist over the full life-time
+		of a CMemoryReadFile, it's sometimes nice to avoid the additional
+		data-copy which read() needs.
+		*/
+		virtual const void *getBuffer() const = 0;
+	};
+} // end namespace io
+} // end namespace irr
+
+#endif
+