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 12 namespace 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. 17 class CC_EXPORT InvalidationRegion { 18 public: 19 InvalidationRegion(); 20 ~InvalidationRegion(); 21 22 void Swap(Region* region); 23 void Clear(); 24 void Union(gfx::Rect rect); IsEmpty()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