private int Invalidate(ISlot slot)
{
if (slot.IsConnected)
{
// slot is an output of an composition op
slot.DirtyFlag.Target = Invalidate(slot.GetConnection(0));
}
else
{
Instance parent = slot.Parent;
foreach (var input in parent.Inputs)
{
if (input.IsConnected)
{
if (input.IsMultiInput)
{
var multiInput = (IMultiInputSlot)input;
int dirtySum = 0;
foreach (var entry in multiInput.GetCollectedInputs())
{
dirtySum += Invalidate(entry);
}
input.DirtyFlag.Target = dirtySum;
}
else
{
input.DirtyFlag.Target = Invalidate(input.GetConnection(0));
}
}
else
{
input.DirtyFlag.Invalidate();
}
}
slot.DirtyFlag.Invalidate();
}
return(slot.DirtyFlag.Target);
}