protected DrawResult Draw(IDrawOperation operation)
{
while (TryConsume() != null)
{
//throw new InvalidOperationException();
}
currentElementIndex = -1;
currentOperationIndex++;
DrawResult result = DrawResult.Different;
bool add = true;
if (currentOperationIndex >= 0 && currentOperationIndex < operations.Count)
{
result = operation.Compare(operations[currentOperationIndex]);
if (result == DrawResult.Different)
{
// Clear the operations after the current index
ClearAfterCurrent();
}
else
{
// Copy the elements from the cached operation.
operation.CopyFrom(operations[currentOperationIndex]);
operations[currentOperationIndex] = operation;
add = false;
}
}
if (add)
{
operations.Add(operation);
}
currentDrawState = result;
return(result);
}
