1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CC_BASE_INVALIDATION_REGION_H_ 6#define CC_BASE_INVALIDATION_REGION_H_ 7 8#include "cc/base/cc_export.h" 9#include "cc/base/region.h" 10#include "ui/gfx/rect.h" 11 12namespace cc { 13 14// This class behaves similarly to Region, but it may have false positives. That 15// is, InvalidationRegion can be simplified to encompass a larger area than the 16// collection of rects unioned. 17class CC_EXPORT InvalidationRegion { 18 public: 19 InvalidationRegion(); 20 ~InvalidationRegion(); 21 22 void Swap(Region* region); 23 void Clear(); 24 void Union(const gfx::Rect& rect); 25 bool IsEmpty() const { return region_.IsEmpty(); } 26 27 private: 28 void SimplifyIfNeeded(); 29 30 Region region_; 31}; 32 33} // namespace cc 34 35#endif // CC_BASE_INVALIDATION_REGION_H_ 36