1 // Copyright 2010 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_RESOURCES_PRIORITY_CALCULATOR_H_ 6 #define CC_RESOURCES_PRIORITY_CALCULATOR_H_ 7 8 #include "base/basictypes.h" 9 #include "cc/base/cc_export.h" 10 11 namespace gfx { class Rect; } 12 13 namespace cc { 14 15 class CC_EXPORT PriorityCalculator { 16 public: 17 PriorityCalculator() {} 18 19 static int UIPriority(bool draws_to_root_surface); 20 static int VisiblePriority(bool draws_to_root_surface); 21 static int RenderSurfacePriority(); 22 static int LingeringPriority(int previous_priority); 23 static int PriorityFromDistance(const gfx::Rect& visible_rect, 24 const gfx::Rect& texture_rect, 25 bool draws_to_root_surface); 26 static int SmallAnimatedLayerMinPriority(); 27 28 static int HighestPriority(); 29 static int LowestPriority(); 30 static inline bool priority_is_lower(int a, int b) { return a > b; } 31 static inline bool priority_is_higher(int a, int b) { return a < b; } 32 static inline int max_priority(int a, int b) { 33 return priority_is_higher(a, b) ? a : b; 34 } 35 36 static int AllowNothingCutoff(); 37 static int AllowVisibleOnlyCutoff(); 38 static int AllowVisibleAndNearbyCutoff(); 39 static int AllowEverythingCutoff(); 40 41 private: 42 DISALLOW_COPY_AND_ASSIGN(PriorityCalculator); 43 }; 44 45 } // namespace cc 46 47 #endif // CC_RESOURCES_PRIORITY_CALCULATOR_H_ 48
