hb-view file
u01@vm01:~/layout/text$ hb-view /usr/share/fonts/truetype/tlwg/Garuda.ttf --text-file=test-thai_s1.txt --output-format=png --output-file=hb_thai_s1.png
u01@vm01:~/layout/text$ hb-view /usr/share/fonts/truetype/tlwg/Garuda.ttf --text-file=test-thai_s1.txt --output-format=png --output-file=hb_thai_s1.png