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