GL_SGIS_multitexture
https://www.khronos.org/registry/OpenGL/extensions/SGIS/SGIS_multitexture.txt
GL_SGIS_multitexture

	GL_SELECTED_TEXTURE_SGIS 0x83C0
	GL_SELECTED_TEXTURE_COORD_SET_SGIS 0x83C1
	GL_SELECTED_TEXTURE_TRANSFORM_SGIS 0x83C2
	GL_MAX_TEXTURES_SGIS 0x83C3
	GL_MAX_TEXTURE_COORD_SETS_SGIS 0x83C4
	GL_TEXTURE_COORD_SET_INTERLEAVE_FACTOR_SGIS 0x83C5
	GL_TEXTURE_ENV_COORD_SET_SGIS 0x83C6
	GL_TEXTURE0_SGIS 0x83C7
	GL_TEXTURE1_SGIS 0x83C8
	GL_TEXTURE2_SGIS 0x83C9
	GL_TEXTURE3_SGIS 0x83CA
	void glInterleavedTextureCoordSetsSGIS (GLint factor)
	void glSelectTextureCoordSetSGIS (GLenum target)
	void glSelectTextureSGIS (GLenum target)
	void glSelectTextureTransformSGIS (GLenum target)