Tex. Code Crim. Proc. art. 24.16

Where, in misdemeanor cases in which confinement in jail is a permissible punishment, or in felony cases, a witness resides out of the county in which the prosecution is pending, the State or the defendant shall be entitled, either in term-time or in vacation, to a subpoena to compel the attendance of such witness on application to the proper clerk or magistrate. Such application shall be in the manner and form as provided in Article 24.03. Witnesses in such misdemeanor cases shall be compensated in the same manner as in felony cases. This Article shall not apply to more than one character witness in a misdemeanor case.