private unsafe void SendCallbackEntryPoint()
{
_createGlyphBitmapsCallbackDelegate = new CreateGlyphsCallbackDelegate(FontCacheAccessor.CreateGlyphsCallback);
IntPtr fcn = Marshal.GetFunctionPointerForDelegate(_createGlyphBitmapsCallbackDelegate);
_reversePInvokeWrapper = new SafeReversePInvokeWrapper(fcn);
DUCE.MILCMD_GLYPHCACHE_SETCALLBACK cmd;
cmd.Type = MILCMD.MilCmdGlyphCacheSetCallback;
cmd.Handle = Handle;
// AddRef the reverse p-invoke wrapper while it is being transferred across the channel. There is a
// small chance we would leak the wrapper. More specifically, if the app domain is shut down before
// the wrapper is picked up by the composition engine.
UnsafeNativeMethods.MILUnknown.AddRef(_reversePInvokeWrapper);
cmd.CallbackPointer = (UInt64)_reversePInvokeWrapper.DangerousGetHandle();
_channel.SendCommand((byte *)&cmd, sizeof(DUCE.MILCMD_GLYPHCACHE_SETCALLBACK), false /* sendInSeparateBatch */);
}
internal static extern UInt32 AddRef(SafeReversePInvokeWrapper pIUnknown);
