cairo:font-options-hint-metrics (options)

options -- a cairo:font-options-t instance
metrics -- a cairo:hint-metrics-t value

The cairo:font-options-hint-metrics function gets the metrics hinting mode for the font options instance. The (setf cairo:font-options-hint-metrics) function sets the metrics hinting mode for the font options instance. This controls whether metrics are quantized to integers in device units. See the documentation for the cairo:hint-metrics-t enumeration for full details.