Method waitForImageBeingRenderedElsewhere

Engine/EffectInstancePrivate.cpp:614–647

}

bool
EffectInstance::Implementation::waitForImageBeingRenderedElsewhere(const RectI & roi,
                                                                            const ImagePtr & img)
{
    if ( !img->usesBitMap() ) {
        return true;
    }
    ImageBeingRenderedPtr ibr;
    QMutexLocker k(&imagesBeingRenderedMutex);
    ImageBeingRenderedMap::iterator found = imagesBeingRendered.find(img);
    if( found != imagesBeingRendered.end() ) {
        ibr = found->second;
    }
    if (!ibr) {
        return true;
    }
    k.unlock(); // imagesBeingRenderedMutex
    std::list<RectI> restToRender;
    bool isBeingRenderedElseWhere = false;
    img->getRestToRender_trimap(roi, restToRender, &isBeingRenderedElseWhere);

    bool ab = _publicInterface->aborted();

    QMutexLocker kk(&ibr->lock);
    while (!ab && isBeingRenderedElseWhere && !ibr->failed && ibr->refCount > 1) {
        ibr->cond.wait(kk.mutex(), 50);
        restToRender.clear();
        isBeingRenderedElseWhere = false;
        img->getRestToRender_trimap(roi, restToRender, &isBeingRenderedElseWhere);
        ab = _publicInterface->aborted();
    }
    ///Everything should be rendered now unless we are aborted
    return restToRender.empty() && !ibr->failed && !ab;
}

void
EffectInstance::Implementation::unmarkImageAsBeingRendered(const ImagePtr & img,