public static void SetFactory(IDWriteFontCollectionLoader loader, IDWriteFactory factory)
{
IntPtr shadowPtr = ToCallbackPtr <IDWriteFontCollectionLoader>(loader);
IDWriteFontCollectionLoaderShadow shadow = ToShadow <IDWriteFontCollectionLoaderShadow>(shadowPtr);
shadow._factory = factory;
}
private static int CreateEnumeratorFromKeyImpl(IntPtr thisPtr, IntPtr factory, IntPtr collectionKey, int collectionKeySize, out IntPtr fontFileEnumerator)
{
fontFileEnumerator = IntPtr.Zero;
try
{
IDWriteFontCollectionLoaderShadow shadow = ToShadow <IDWriteFontCollectionLoaderShadow>(thisPtr);
IDWriteFontCollectionLoader callback = (IDWriteFontCollectionLoader)shadow.Callback;
Debug.Assert(factory == shadow._factory.NativePointer);
IDWriteFontFileEnumerator enumerator = callback.CreateEnumeratorFromKey(shadow._factory, collectionKey, collectionKeySize);
fontFileEnumerator = IDWriteFontFileEnumeratorShadow.ToIntPtr(enumerator);
}
catch (Exception exception)
{
return((int)Result.GetResultFromException(exception));
}
return(Result.Ok.Code);
}
/// <summary>
/// Registers a custom font collection loader with the factory object.
/// </summary>
/// <param name="fontCollectionLoader">Reference to a <see cref="IDWriteFontCollectionLoader"/> object to be registered.</param>
public void RegisterFontCollectionLoader(IDWriteFontCollectionLoader fontCollectionLoader)
{
IDWriteFontCollectionLoaderShadow.SetFactory(fontCollectionLoader, this);
RegisterFontCollectionLoader_(fontCollectionLoader);
_fontCollectionLoaderCallbacks.Add(fontCollectionLoader);
}