Texas Code of Criminal Procedure - CRIM P Art. 2.05. When complaint is made

If the offense be a misdemeanor, the attorney shall forthwith prepare an information based upon such complaint and file the same in the court having jurisdiction; provided, that in counties having no county attorney, misdemeanor cases may be tried upon complaint alone, without an information, provided, however, in counties having one or more criminal district courts an information must be filed in each misdemeanor case. If the offense be a felony, he shall forthwith file the complaint with a magistrate of the county.