Specifies whether to hint font metrics; hinting font metrics
means quantizing them so that they are integer values in
device space. Doing this improves the consistency of
letter and line spacing, however it also means that text
will be laid out differently at different zoom factors.
CAIRO_HINT_METRICS_DEFAULT
Hint metrics in the default
manner for the font backend and target device
CAIRO_HINT_METRICS_OFF
Do not hint font metrics
CAIRO_HINT_METRICS_ON
Hint font metrics
Specifies whether to hint font metrics; hinting font metrics means quantizing them so that they are integer values in device space. Doing this improves the consistency of letter and line spacing, however it also means that text will be laid out differently at different zoom factors. CAIRO_HINT_METRICS_DEFAULT Hint metrics in the default manner for the font backend and target device CAIRO_HINT_METRICS_OFF Do not hint font metrics CAIRO_HINT_METRICS_ON Hint font metrics