experimental drawing optimization.
Q: is bounding_box(); etc more complex than queuing draw? either way, canvas should eventually switch to use an optimized OptimizingLookupTable.
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@ -41,11 +41,22 @@ DumbLookupTable::DumbLookupTable (Item const & item)
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}
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vector<Item *>
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DumbLookupTable::get (Rect const &)
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DumbLookupTable::get (Rect const &area)
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{
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list<Item *> const & items = _item.items ();
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vector<Item *> vitems;
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#if 1
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for (list<Item *>::const_iterator i = items.begin(); i != items.end(); ++i) {
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boost::optional<Rect> item_bbox = (*i)->bounding_box ();
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if (!item_bbox) continue;
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Rect item = (*i)->item_to_window (item_bbox.get());
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if (item.intersection (area)) {
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vitems.push_back (*i);
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}
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}
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#else
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copy (items.begin(), items.end(), back_inserter (vitems));
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#endif
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return vitems;
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}
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