[ft] how to get text width and height in libfreetype

[qw]

Hi,

ffmpeg adopts libfreetype as 'drawtext filter'.

 

In ffmpeg, 'drawtext filter' is used to put some utf-8 format text over video stream. I want to get two values, i.e. text_h and text_w, which will be used in c/c++ functions.

http://ffmpeg.org/ffmpeg-filters.html#drawtext-1

text_h, th

the height of the rendered text

text_w, tw

the width of the rendered text

 

How to get those two values? Does libfreetype have some interface function to fetch the two value for some input text?

Thanks!

Andrew