The phrase Daulat Tuanku is a classical Malay royal salute meaning "Long live the King" or "Hail to the Majesty," traditionally used in the courts of Malay sultanates (e.g., Perak, Selangor, Kedah). You are likely referring to one of the following:
Aina watched from the corner, mesmerized. She realized then that the font on the screen was merely a shadow; Hafiz was painting the light.
It has since become the unofficial "Palace Font" of the Malay world.