GL_SGI_complex_type
http://www.opengl.org/registry/specs/SGI/complex_type.txt
GL_SGI_complex_type

	GL_COMPLEX_UNSIGNED_BYTE_SGI 0x81BD
	GL_COMPLEX_BYTE_SGI 0x81BE
	GL_COMPLEX_UNSIGNED_SHORT_SGI 0x81BF
	GL_COMPLEX_SHORT_SGI 0x81C0
	GL_COMPLEX_UNSIGNED_INT_SGI 0x81C1
	GL_COMPLEX_INT_SGI 0x81C2
	GL_COMPLEX_FLOAT_SGI 0x81C3
