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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 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 #ifndef CompositingReasons_h | 5 #ifndef CompositingReasons_h |
6 #define CompositingReasons_h | 6 #define CompositingReasons_h |
7 | 7 |
8 #include "wtf/MathExtras.h" | 8 #include "wtf/MathExtras.h" |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
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55 const uint64_t CompositingReasonLayerForMask = UINT64_
C(1) << 31; | 55 const uint64_t CompositingReasonLayerForMask = UINT64_
C(1) << 31; |
56 | 56 |
57 // FIXME: the following compositing reasons need to be re-organized to fit with
categories | 57 // FIXME: the following compositing reasons need to be re-organized to fit with
categories |
58 // used in all the other reasons above. | 58 // used in all the other reasons above. |
59 const uint64_t CompositingReasonOverflowScrollingParent = UINT64_
C(1) << 32; | 59 const uint64_t CompositingReasonOverflowScrollingParent = UINT64_
C(1) << 32; |
60 const uint64_t CompositingReasonOutOfFlowClipping = UINT64_
C(1) << 33; | 60 const uint64_t CompositingReasonOutOfFlowClipping = UINT64_
C(1) << 33; |
61 | 61 |
62 const uint64_t CompositingReasonLayerForVideoOverlay = UINT64_
C(1) << 34; | 62 const uint64_t CompositingReasonLayerForVideoOverlay = UINT64_
C(1) << 34; |
63 const uint64_t CompositingReasonIsolateCompositedDescendants = UINT64_
C(1) << 35; | 63 const uint64_t CompositingReasonIsolateCompositedDescendants = UINT64_
C(1) << 35; |
64 | 64 |
| 65 // Note: if you add more reasons here, you will need to update WebCompositingRea
sons as well. |
| 66 |
| 67 // Various combinations of compositing reasons are defined here also, for more i
ntutive and faster bitwise logic. |
65 const uint64_t CompositingReasonComboAllDirectReasons = | 68 const uint64_t CompositingReasonComboAllDirectReasons = |
66 CompositingReason3DTransform | 69 CompositingReason3DTransform |
67 | CompositingReasonVideo | 70 | CompositingReasonVideo |
68 | CompositingReasonCanvas | 71 | CompositingReasonCanvas |
69 | CompositingReasonPlugin | 72 | CompositingReasonPlugin |
70 | CompositingReasonIFrame | 73 | CompositingReasonIFrame |
71 | CompositingReasonBackfaceVisibilityHidden | 74 | CompositingReasonBackfaceVisibilityHidden |
72 | CompositingReasonAnimation | 75 | CompositingReasonAnimation |
73 | CompositingReasonFilters | 76 | CompositingReasonFilters |
74 | CompositingReasonPositionFixed | 77 | CompositingReasonPositionFixed |
75 | CompositingReasonPositionSticky | 78 | CompositingReasonPositionSticky |
76 | CompositingReasonOverflowScrollingTouch | 79 | CompositingReasonOverflowScrollingTouch |
77 | CompositingReasonOverflowScrollingParent | 80 | CompositingReasonOverflowScrollingParent |
78 | CompositingReasonOutOfFlowClipping; | 81 | CompositingReasonOutOfFlowClipping; |
79 | 82 |
80 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking = | 83 const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking = |
81 CompositingReasonComboAllDirectReasons | 84 CompositingReasonComboAllDirectReasons |
82 | CompositingReasonOverlap | 85 | CompositingReasonOverlap |
83 | CompositingReasonAssumedOverlap | 86 | CompositingReasonAssumedOverlap |
84 | CompositingReasonNegativeZIndexChildren | 87 | CompositingReasonNegativeZIndexChildren |
85 | CompositingReasonTransformWithCompositedDescendants | 88 | CompositingReasonTransformWithCompositedDescendants |
86 | CompositingReasonOpacityWithCompositedDescendants | 89 | CompositingReasonOpacityWithCompositedDescendants |
87 | CompositingReasonMaskWithCompositedDescendants | 90 | CompositingReasonMaskWithCompositedDescendants |
88 | CompositingReasonFilterWithCompositedDescendants | 91 | CompositingReasonFilterWithCompositedDescendants |
89 | CompositingReasonBlendingWithCompositedDescendants | 92 | CompositingReasonBlendingWithCompositedDescendants |
90 | CompositingReasonIsolateCompositedDescendants | 93 | CompositingReasonIsolateCompositedDescendants |
91 | CompositingReasonPreserve3D; // preserve-3d has to create backing store to
ensure that 3d-transformed elements intersect. | 94 | CompositingReasonPreserve3D; // preserve-3d has to create backing store to
ensure that 3d-transformed elements intersect. |
92 | 95 |
93 // Note: if you add more reasons here, you will need to update WebCompositingRea
sons as well. | 96 const uint64_t CompositingReasonComboAllOverlapReasons = |
| 97 CompositingReasonOverlap |
| 98 | CompositingReasonAssumedOverlap; |
| 99 |
94 typedef uint64_t CompositingReasons; | 100 typedef uint64_t CompositingReasons; |
95 | 101 |
96 | 102 |
97 } // namespace WebCore | 103 } // namespace WebCore |
98 | 104 |
99 #endif // CompositingReasons_h | 105 #endif // CompositingReasons_h |
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