Method getScale

snap_drawing/src/snap_drawing/cpp/Layers/LayerRoot.cpp:357–359

bool LayerRoot::needsProcessFrame() const {
    return _didEnqueueFrame || _needsDisplay || needsLayout() || !_eventQueue.isEmpty() || !_touchDispatcher.isEmpty();
}

bool LayerRoot::needsLayout() const {
    return _needsLayout && _contentLayer != nullptr;
}