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GL_ARB_draw_indirect
http://www.opengl.org/registry/specs/ARB/draw_indirect.txt
GL_ARB_draw_indirect
	GL_DRAW_INDIRECT_BUFFER 0x8F3F
	GL_DRAW_INDIRECT_BUFFER_BINDING 0x8F43
	void glDrawArraysIndirect (GLenum mode, const void* indirect)
	void glDrawElementsIndirect (GLenum mode, GLenum type, const void* indirect)