• Dmitry Kazakov's avatar
    Fix filters slowdown due to progress reporting · 907f88b9
    Dmitry Kazakov authored
    Now we have a special type of a sequential iterator
    (KisSequentialIteratorProgress), which can also handle
    progress reporting (report on every new line).
    This patch also refactors a few filters to use sequential
    iterator and support multithreading/instant preview.