GL_HP_image_transform
http://oss.sgi.com/projects/ogl-sample/registry/HP/image_transform.txt
	void glGetImageTransformParameterfvHP (GLenum target, GLenum pname, const GLfloat* params)
	void glGetImageTransformParameterivHP (GLenum target, GLenum pname, const GLint* params)
	void glImageTransformParameterfHP (GLenum target, GLenum pname, const GLfloat param)
	void glImageTransformParameterfvHP (GLenum target, GLenum pname, const GLfloat* params)
	void glImageTransformParameteriHP (GLenum target, GLenum pname, const GLint param)
	void glImageTransformParameterivHP (GLenum target, GLenum pname, const GLint* params)