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1 // Copyright 2017 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 COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_AGGREGATOR_H_ | |
6 #define COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_AGGREGATOR_H_ | |
7 | |
8 #include "cc/surfaces/surface_id.h" | |
9 #include "cc/surfaces/surface_observer.h" | |
10 #include "components/viz/common/hit_test/display_hit_test_data.h" | |
11 #include "components/viz/service/hit_test/display_hit_test_data_factory.h" | |
12 #include "components/viz/service/viz_service_export.h" | |
13 #include "services/viz/hit_test/public/interfaces/hit_test_data.mojom.h" | |
14 | |
15 namespace viz { | |
16 namespace hit_test { | |
17 | |
18 namespace test { | |
19 class HitTestAggregatorTest; | |
20 } | |
21 | |
22 // HitTestAggregator maintains maping between display regions and associated | |
23 // surfaces in shared memory to enable efficient hit testing across processes. | |
24 // | |
25 // This is intended to be created in the viz or GPU process. For mus+ash this | |
26 // will be true after the mus process split. | |
27 | |
28 using HitTestDataMap = std::map<cc::SurfaceId, hit_test::mojom::HitTestDataPtr>; | |
varkha
2017/06/20 19:56:59
Does this need to be visible publicly?
gklassen
2017/06/26 21:55:20
Done.
| |
29 | |
30 class VIZ_SERVICE_EXPORT HitTestAggregator : public cc::SurfaceObserver { | |
31 public: | |
32 HitTestAggregator( | |
33 std::unique_ptr<DisplayHitTestDataFactory> display_hit_test_data_factory); | |
34 ~HitTestAggregator(); | |
35 | |
36 // Called when HitTestData is submitted along with every call | |
37 // to SubmitCompositorFrame. This is collected in pending_ until | |
38 // surfaces are aggregated and put on the display. | |
39 void SubmitHitTestData(hit_test::mojom::HitTestDataPtr hit_test_data); | |
40 | |
41 // Called after surfaces have been aggregated into the DisplayFrame. | |
42 // In this call HitTestData structures received from active surfaces | |
43 // are aggregated into the DisplayHitTestData structure in | |
44 // shared memory used for event targetting. | |
45 void Aggregate(cc::SurfaceId display_surface_id); | |
varkha
2017/06/20 19:56:59
Q: Do both Aggregate and PostTaskAggregate need to
gklassen
2017/06/26 21:55:20
Done.
| |
46 | |
47 // Performs the work of Aggregate by creating a PostTask so that | |
48 // the work is not directly on the call. | |
49 void PostTaskAggregate(cc::SurfaceId display_surface_id); | |
50 | |
51 // Called at BeginFrame. Swaps buffers in shared memory. | |
52 void Swap(); | |
53 | |
54 // Returns a pointer to the DisplayHitTestRegion list currently | |
55 // used for hit-testing. | |
56 DisplayHitTestRegion* GetCurrentRegions(); | |
57 | |
58 private: | |
59 friend class test::HitTestAggregatorTest; | |
60 | |
61 // Allocates memory for the DisplayHitTestData Structure. | |
62 void AllocateDisplayHitTestData(); | |
63 void AllocateDisplayHitTestData(int length); | |
64 | |
65 // Resizes the memory for the DisplayHitTestData Structure. | |
66 // Copies current data and marks the current structure as old. | |
67 void ResizeDisplayHitTestData(int length); | |
68 | |
69 int GetBackIndex(); | |
varkha
2017/06/20 19:56:59
nit: doc.
gklassen
2017/06/26 21:55:19
Done.
| |
70 | |
71 // Appends the root element to the DisplayHitTestData structure. | |
72 int AppendRoot(cc::SurfaceId surface_id, int index); | |
73 | |
74 // Appends a region to the DisplayHitTestData structure to recursively | |
75 // build the tree. | |
76 int AppendRegion(const hit_test::mojom::HitTestRegionPtr& region, int index); | |
77 | |
78 // cc:SurfaceObserver | |
varkha
2017/06/20 19:56:59
nit: cc::SurfaceObserver:
gklassen
2017/06/26 21:55:20
Done.
| |
79 void OnSurfaceCreated(const cc::SurfaceInfo& surface_info) override {} | |
80 void OnSurfaceDestroyed(const cc::SurfaceId& surface_id) override {} | |
81 bool OnSurfaceDamaged(const cc::SurfaceId& surface_id, | |
82 const cc::BeginFrameAck& ack) override; | |
83 void OnSurfaceDiscarded(const cc::SurfaceId& surface_id) override; | |
84 void OnSurfaceDamageExpected(const cc::SurfaceId& surface_id, | |
85 const cc::BeginFrameArgs& args) override {} | |
86 | |
87 // Called when a surface has been aggregated and added to the | |
88 // display frame. HitTestData objects are held but ignored until | |
89 // this happens. HitTestData for the surface is copied from |pending_| | |
90 // to |active_| in this method. | |
91 void OnSurfaceWillDraw(const cc::SurfaceId& surface_id) override; | |
92 | |
93 // The collection of received HitTestData objects that have not yet | |
94 // been added to the DisplayFrame ( OnSurfaceWillDraw has not been called ). | |
95 HitTestDataMap pending_; | |
96 | |
97 // The collection of HitTestData objects that have need added to the | |
98 // DisplayFrame ( OnSurfaceWillDraw has been called ). | |
99 HitTestDataMap active_; | |
100 | |
101 // Keeps track of the number of regions in the active list | |
102 // so that we know when we exceed the available length. | |
103 int active_region_count_; | |
104 | |
105 // The object used to allocate memory for the DisplayHitTestData structure. | |
106 std::unique_ptr<DisplayHitTestDataFactory> display_hit_test_data_factory_; | |
107 | |
108 DisplayHitTestData* display_hit_test_data_; | |
109 | |
110 // WeakPtr to handle the case when this object is deleted after | |
111 // the PostTaskAggregation call is scheduled but before invocation. | |
112 base::WeakPtrFactory<HitTestAggregator> weak_ptr_factory_; | |
113 | |
114 DISALLOW_COPY_AND_ASSIGN(HitTestAggregator); | |
115 }; | |
116 | |
117 } // namespace hit_test | |
118 } // namespace viz | |
119 | |
120 #endif // COMPONENTS_VIZ_SERVICE_HIT_TEST_HIT_TEST_AGGREGATOR_H_ | |
varkha
2017/06/20 19:56:59
nit: extra space after //
varkha
2017/06/20 19:56:59
nit: extra space after //
gklassen
2017/06/26 21:55:20
Done.
gklassen
2017/06/26 21:55:20
Done.
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