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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "config.h" | 5 #include "config.h" |
6 | 6 |
7 #include "CCPriorityCalculator.h" | 7 #include "CCPriorityCalculator.h" |
8 | 8 |
9 using namespace std; | 9 using namespace std; |
10 | 10 |
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22 static const int notVisibleLimitPriority = 1900000; | 22 static const int notVisibleLimitPriority = 1900000; |
23 | 23 |
24 // Small animated layers are treated as though they are 512 pixels | 24 // Small animated layers are treated as though they are 512 pixels |
25 // from being visible. | 25 // from being visible. |
26 static const int smallAnimatedLayerPriority = notVisibleBasePriority + 512; | 26 static const int smallAnimatedLayerPriority = notVisibleBasePriority + 512; |
27 | 27 |
28 static const int lingeringBasePriority = 2000000; | 28 static const int lingeringBasePriority = 2000000; |
29 static const int lingeringLimitPriority = 2900000; | 29 static const int lingeringLimitPriority = 2900000; |
30 | 30 |
31 // static | 31 // static |
32 int CCPriorityCalculator::uiPriority(bool drawsToRootSurface) | 32 int PriorityCalculator::uiPriority(bool drawsToRootSurface) |
33 { | 33 { |
34 return drawsToRootSurface ? uiDrawsToRootSurfacePriority : uiDoesNotDrawToRo
otSurfacePriority; | 34 return drawsToRootSurface ? uiDrawsToRootSurfacePriority : uiDoesNotDrawToRo
otSurfacePriority; |
35 } | 35 } |
36 | 36 |
37 // static | 37 // static |
38 int CCPriorityCalculator::visiblePriority(bool drawsToRootSurface) | 38 int PriorityCalculator::visiblePriority(bool drawsToRootSurface) |
39 { | 39 { |
40 return drawsToRootSurface ? visibleDrawsToRootSurfacePriority : visibleDoesN
otDrawToRootSurfacePriority; | 40 return drawsToRootSurface ? visibleDrawsToRootSurfacePriority : visibleDoesN
otDrawToRootSurfacePriority; |
41 } | 41 } |
42 | 42 |
43 // static | 43 // static |
44 int CCPriorityCalculator::renderSurfacePriority() | 44 int PriorityCalculator::renderSurfacePriority() |
45 { | 45 { |
46 return renderSurfacesPriority; | 46 return renderSurfacesPriority; |
47 } | 47 } |
48 | 48 |
49 // static | 49 // static |
50 int CCPriorityCalculator::lingeringPriority(int previousPriority) | 50 int PriorityCalculator::lingeringPriority(int previousPriority) |
51 { | 51 { |
52 // FIXME: We should remove this once we have priorities for all | 52 // FIXME: We should remove this once we have priorities for all |
53 // textures (we can't currently calculate distances for | 53 // textures (we can't currently calculate distances for |
54 // off-screen textures). | 54 // off-screen textures). |
55 return min(lingeringLimitPriority, | 55 return min(lingeringLimitPriority, |
56 max(lingeringBasePriority, previousPriority + 1)); | 56 max(lingeringBasePriority, previousPriority + 1)); |
57 } | 57 } |
58 | 58 |
59 namespace { | 59 namespace { |
60 int manhattanDistance(const IntRect& a, const IntRect& b) | 60 int manhattanDistance(const IntRect& a, const IntRect& b) |
61 { | 61 { |
62 IntRect c = unionRect(a, b); | 62 IntRect c = unionRect(a, b); |
63 int x = max(0, c.width() - a.width() - b.width() + 1); | 63 int x = max(0, c.width() - a.width() - b.width() + 1); |
64 int y = max(0, c.height() - a.height() - b.height() + 1); | 64 int y = max(0, c.height() - a.height() - b.height() + 1); |
65 return (x + y); | 65 return (x + y); |
66 } | 66 } |
67 } | 67 } |
68 | 68 |
69 // static | 69 // static |
70 int CCPriorityCalculator::priorityFromDistance(const IntRect& visibleRect, const
IntRect& textureRect, bool drawsToRootSurface) | 70 int PriorityCalculator::priorityFromDistance(const IntRect& visibleRect, const I
ntRect& textureRect, bool drawsToRootSurface) |
71 { | 71 { |
72 int distance = manhattanDistance(visibleRect, textureRect); | 72 int distance = manhattanDistance(visibleRect, textureRect); |
73 if (!distance) | 73 if (!distance) |
74 return visiblePriority(drawsToRootSurface); | 74 return visiblePriority(drawsToRootSurface); |
75 return min(notVisibleLimitPriority, notVisibleBasePriority + distance); | 75 return min(notVisibleLimitPriority, notVisibleBasePriority + distance); |
76 } | 76 } |
77 | 77 |
78 // static | 78 // static |
79 int CCPriorityCalculator::smallAnimatedLayerMinPriority() | 79 int PriorityCalculator::smallAnimatedLayerMinPriority() |
80 { | 80 { |
81 return smallAnimatedLayerPriority; | 81 return smallAnimatedLayerPriority; |
82 } | 82 } |
83 | 83 |
84 } // cc | 84 } // cc |
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