GL_PGI_vertex_hints
http://www.opengl.org/registry/specs/PGI/vertex_hints.txt
GL_PGI_vertex_hints
	GL_VERTEX23_BIT_PGI 0x00000004
	GL_VERTEX4_BIT_PGI 0x00000008
	GL_COLOR3_BIT_PGI 0x00010000
	GL_COLOR4_BIT_PGI 0x00020000
	GL_EDGEFLAG_BIT_PGI 0x00040000
	GL_INDEX_BIT_PGI 0x00080000
	GL_MAT_AMBIENT_BIT_PGI 0x00100000
	GL_VERTEX_DATA_HINT_PGI 107050
	GL_VERTEX_CONSISTENT_HINT_PGI 107051
	GL_MATERIAL_SIDE_HINT_PGI 107052
	GL_MAX_VERTEX_HINT_PGI 107053
	GL_MAT_AMBIENT_AND_DIFFUSE_BIT_PGI 0x00200000
	GL_MAT_DIFFUSE_BIT_PGI 0x00400000
	GL_MAT_EMISSION_BIT_PGI 0x00800000
	GL_MAT_COLOR_INDEXES_BIT_PGI 0x01000000
	GL_MAT_SHININESS_BIT_PGI 0x02000000
	GL_MAT_SPECULAR_BIT_PGI 0x04000000
	GL_NORMAL_BIT_PGI 0x08000000
	GL_TEXCOORD1_BIT_PGI 0x10000000
	GL_TEXCOORD2_BIT_PGI 0x20000000
	GL_TEXCOORD3_BIT_PGI 0x40000000
	GL_TEXCOORD4_BIT_PGI 0x80000000