void UpdateLayoutPlan()
{
GlyphLayoutPlanContext context = _layoutPlanCollection.GetPlanOrCreate(this._typeface, this._scriptLang);
this._gpos = context._glyphPos;
this._gsub = context._glyphSub;
_needPlanUpdate = false;
}
/// <summary>
/// get glyph layout plan or create if not exists
/// </summary>
/// <param name="typeface"></param>
/// <param name="scriptLang"></param>
/// <returns></returns>
public GlyphLayoutPlanContext GetPlanOrCreate(Typeface typeface, ScriptLang scriptLang)
{
GlyphLayoutPlanKey key = new GlyphLayoutPlanKey(typeface, scriptLang.internalName);
if (!_collection.TryGetValue(key, out GlyphLayoutPlanContext context))
{
var glyphSubstitution = (typeface.GSUBTable != null) ? new GlyphSubstitution(typeface, scriptLang.shortname) : null;
var glyphPosition = (typeface.GPOSTable != null) ? new GlyphSetPosition(typeface, scriptLang.shortname) : null;
_collection.Add(key, context = new GlyphLayoutPlanContext(glyphSubstitution, glyphPosition));
}
return(context);
}