true if found script/language-specific font extents.otLayoutGetFontExtents
fn
harfbuzz.types.Bool otLayoutGetFontExtents(harfbuzz.font.Font font, harfbuzz.types.Direction direction, harfbuzz.types.Tag scriptTag, harfbuzz.types.Tag languageTag, out harfbuzz.types.FontExtents extents)Fetches script/language-specific font extents. These values are looked up in the BASE table's MinMax records.
If no such extents are found, the default extents for the font are fetched. As such, the return value of this function can for the most part be ignored. Note that the per-script/language extents do not have a line-gap value, and the line-gap is set to zero in that case.
Parameters
font | a font |
direction | text direction. |
scriptTag | script tag. |
languageTag | language tag. |
extents | font extents if found. |