Luna::Font::IFontFile::get_vmetrics

virtual void get_vmetrics(u32 font_index, i32 *ascent, i32 *descent, i32 *line_gap)=0

Gets the metrics information for a font in the vertical side.

These values are expressed in unscaled coordinates, so you must multiply by the scale factor for a given size.

Parameters

• in font_index

  The index of the font to query.

• out ascent

  The coordinate above the baseline the font extends.

• out descent

  The coordinate below the baseline the font extends (i.e. it is typically negative).

• out line_gap

  The spacing between one row's descent and the next row's ascent, so you should advance the vertical position by "ascent - descent + *line_gap"