/// <summary>
/// Get the name of the default font for the given language tag.
/// </summary>
/// <param name="lang">ISO 3066 tag for the language (e.g., "en", "es", "zh-CN", etc.)</param>
/// <returns>Name of the font, or <c>null</c> if not found.</returns>
public static string GetFontNameForLanguage(string lang)
{
if (MiscUtils.IsWindows)
{
throw new PlatformNotSupportedException();
}
string fontName;
if (m_mapLangToFont.TryGetValue(lang, out fontName))
{
return(fontName);
}
IntPtr pattern = FcPatternCreate();
int isOk = FcPatternAddString(pattern, FC_LANG, lang);
if (isOk == 0)
{
FcPatternDestroy(pattern);
return(null);
}
isOk = FcConfigSubstitute(IntPtr.Zero, pattern, FcMatchKind.FcMatchPattern);
if (isOk == 0)
{
FcPatternDestroy(pattern);
return(null);
}
FcDefaultSubstitute(pattern);
FcResult result;
IntPtr fullPattern = FcFontMatch(IntPtr.Zero, pattern, out result);
if (result != FcResult.FcResultMatch)
{
FcPatternDestroy(pattern);
FcPatternDestroy(fullPattern);
return(null);
}
FcPatternDestroy(pattern);
IntPtr res;
FcResult fcRes = FcPatternGetString(fullPattern, FC_FAMILY, 0, out res);
if (fcRes == FcResult.FcResultMatch)
{
fontName = Marshal.PtrToStringAuto(res);
m_mapLangToFont.Add(lang, fontName);
}
FcPatternDestroy(fullPattern);
return(fontName);
}
public FcPattern Match(FcConfig config, out FcResult result)
{
return(new FcPattern(Native.FcFontMatch(config.Handle, Handle, out result)));
}
public static extern System.IntPtr FcFontMatch(System.IntPtr config, System.IntPtr p, out FcResult result);
static extern IntPtr FcFontMatch(IntPtr config, IntPtr pattern, out FcResult result);
static extern IntPtr FcFontMatch(IntPtr config, IntPtr pattern, out FcResult result);
private static extern IntPtr FcFontMatch_Base(IntPtr config, IntPtr pattern, out FcResult result);