load static method
Implementation
static Future<UPdfFont> load(UPdfDocument document, UPdfDict dict, {String cacheKey = ""}) async {
final UPdfFont? cached = cacheKey.isEmpty ? null : _cache[cacheKey];
if (cached != null) return cached;
final UPdfFont font = await _build(document, dict);
if (cacheKey.isNotEmpty) {
if (_cache.length > 256) _cache.clear();
_cache[cacheKey] = font;
}
return font;
}