GL_OES_mapbuffer
https://www.khronos.org/registry/OpenGL/extensions/OES/OES_mapbuffer.txt
GL_OES_mapbuffer

	GL_WRITE_ONLY_OES 0x88B9
	GL_BUFFER_ACCESS_OES 0x88BB
	GL_BUFFER_MAPPED_OES 0x88BC
	GL_BUFFER_MAP_POINTER_OES 0x88BD
	void glGetBufferPointervOES (GLenum target, GLenum pname, void** params)
	void * glMapBufferOES (GLenum target, GLenum access)
	GLboolean glUnmapBufferOES (GLenum target)