static IEnumerable <string> ResolveFontConfig()
{
var config = fcConfig.Value;
using (var pattern = FcPatternCreate())
using (var os = FcObjectSetHandle.Create("family", "style", "file"))
using (var fs = FcFontList(config, pattern, os))
{
var fset = fs.Read();
for (int index = 0; index < fset.nfont; index++)
{
var font = Marshal.ReadIntPtr(fset.fonts, index * Marshal.SizeOf <IntPtr>());
var family = GetString(font, "family");
var style = GetString(font, "style");
var file = GetString(font, "file");
if (family is null || style is null || file is null)
{
continue;
}
yield return(file);
}
}
}
[DllImport(libfontconfig)] public static extern FcFontSetHandle FcFontList(IntPtr config, FcPatternHandle pattern, FcObjectSetHandle os);
[DllImport(libfontconfig)] public static extern int FcObjectSetAdd(FcObjectSetHandle os, [MarshalAs(UnmanagedType.LPStr)] string obj);