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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 |
| (...skipping 11 matching lines...) Expand all Loading... |
| 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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