if (!mXftFont) GetXftFont();  XftTextExtents32(GDK_DISPLAY(), mXftFont, &aString, 1, &glyphInfo);
GetTextExtents32(aString, aLen, glyphInfo);
nsFontXft::GetWidth32(FcChar32 aString){    XGlyphInfo glyphInfo;    if (!mXftFont)        GetXftFont();    XftTextExtents32(GDK_DISPLAY(), mXftFont, &aString, 1, &glyphInfo);    return glyphInfo.xOff;}