Function GetPreferredWeightDistance

src/os/unix/font_unix.cpp:131–140

* Get distance between font weight and preferred font weights. * @param weight Font weight from FontConfig. * @return Distance from preferred weight, where lower values are preferred. */

 * @return Distance from preferred weight, where lower values are preferred.
 */
static int GetPreferredWeightDistance(int weight)
{
	/* Prefer a font between normal and medium weight. */
	static constexpr int PREFERRED_WEIGHT_MIN = FC_WEIGHT_NORMAL;
	static constexpr int PREFERRED_WEIGHT_MAX = FC_WEIGHT_MEDIUM;

	if (weight < PREFERRED_WEIGHT_MIN) return std::abs(weight - PREFERRED_WEIGHT_MIN);
	if (weight > PREFERRED_WEIGHT_MAX) return weight - PREFERRED_WEIGHT_MAX;
	return 0;
}

bool FontConfigFindFallbackFont(FontCacheSettings *settings, const std::string &language_isocode, MissingGlyphSearcher *callback)
{