public static void UpdateFonts(IEnumerable<Material> materials, Func<string, FontInfo> getFont,
IFontService fontService)
{
var requiredFonts = materials.SelectMany(m => m.MaterialFields).Select(f => f.FontName);
foreach (var requiredFontName in requiredFonts.Where(f => fontService.IsFontAvailable(f) == false))
{
var fontInfo = getFont(requiredFontName);
if (fontInfo != null)
{
fontService.InstallFont(fontInfo.FileName, fontInfo.Buffer);
}
}
}