It is not illegal to print in texas.
Texas Government Code - Section 411.171. Definitions
(3) "Concealed Handgun" means a handgun, the presence of which is not openly discernible to the ordinary observation of a reasonable person.
According to the Texas Department of Public Safety, “‘Concealed’ means that the weapon cannot be visible, and that its presence cannot be discernible through ordinary observation. It is a criminal offense for a license holder to carry a handgun in plain view, or to intentionally fail to conceal the weapon.”
Even unintentional display is not illegal, as long as you correct the situation once you are aware that your firearm is visible to others.