GL_SGIX_sprite
http://oss.sgi.com/projects/ogl-sample/registry/SGIX/sprite.txt
	void glSpriteParameterfSGIX (GLenum pname, GLfloat param)
	void glSpriteParameterfvSGIX (GLenum pname, GLfloat* params)
	void glSpriteParameteriSGIX (GLenum pname, GLint param)
	void glSpriteParameterivSGIX (GLenum pname, GLint* params)
