GL_ATIX_point_sprites
http://www.ati.com/developer/atiopengl.pdf
	GL_TEXTURE_POINT_MODE_ATIX 0x60b0
	GL_TEXTURE_POINT_ONE_COORD_ATIX 0x60b1
	GL_TEXTURE_POINT_SPRITE_ATIX 0x60b2
	GL_POINT_SPRITE_CULL_MODE_ATIX 0x60b3
	GL_POINT_SPRITE_CULL_CENTER_ATIX 0x60b4
	GL_POINT_SPRITE_CULL_CLIP_ATIX 0x60b5