GL_AMD_multi_draw_indirect
http://www.opengl.org/registry/specs/gl/AMD/multi_draw_indirect.txt
GL_AMD_multi_draw_indirect
	void glMultiDrawArraysIndirectAMD (GLenum mode, const GLvoid *indirect, GLsizei primcount, GLsizei stride)
	void glMultiDrawElementsIndirectAMD (GLenum mode, GLenum type, const GLvoid *indirect, GLsizei primcount, GLsizei stride)
