You must meet all other requirements for a Texas license, including taking the Texas training course in Texas. You also need to get a Texas identification card.
In general the application process is to submit an Application Request (PDF) to the Texas Department of Public Safety. You will also have to come to Texas to take a Texas CHL course. Then you fill out the application forms and submit them with your course certificate to DPS.
A growing number of states have reciprocity agreements with Texas, making their CHL's valid in Texas and vice versa. Under Texas law effective September 1, 1997, the Texas Department of Public Safety is negotiating agreements with states where: