Ascent, descent and line height of a font slot at size points.
- text: the text system holding the fonts.
- slot: which font to measure.
- size: the font size in points.
font_metrics :: (
text: *Text_System,
slot: Font_Slot,
size: float
) -> Font_MetricsAscent, descent and line height of a font slot at size points.
Parameters
- text: *Text_System
- the text system holding the fonts.
- slot: Font_Slot
- which font to measure.
- size: float
- the font size in points.