1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#import <WebCore/Timer.h>
#import <wtf/HashSet.h>
#import <wtf/Noncopyable.h>
#import <wtf/OptionSet.h>
#import <wtf/TZoneMalloc.h>
#import <wtf/WeakHashSet.h>
#import <wtf/WeakPtr.h>
namespace WebCore {
class ImageBuffer;
class ThreadSafeImageBufferFlusher;
enum class SetNonVolatileResult : uint8_t;
}
namespace WebKit {
class RemoteLayerBackingStore;
class RemoteLayerWithRemoteRenderingBackingStore;
class RemoteLayerWithInProcessRenderingBackingStore;
class RemoteLayerTreeContext;
class RemoteLayerTreeTransaction;
class RemoteImageBufferSetProxy;
class ThreadSafeImageBufferSetFlusher;
enum class BufferInSetType : uint8_t;
enum class SwapBuffersDisplayRequirement : uint8_t;
class RemoteLayerBackingStoreCollection : public CanMakeWeakPtr<RemoteLayerBackingStoreCollection> {
WTF_MAKE_TZONE_ALLOCATED(RemoteLayerBackingStoreCollection);
WTF_MAKE_NONCOPYABLE(RemoteLayerBackingStoreCollection);
public:
RemoteLayerBackingStoreCollection(RemoteLayerTreeContext&);
virtual ~RemoteLayerBackingStoreCollection();
void ref() const;
void deref() const;
void markFrontBufferVolatileForTesting(RemoteLayerBackingStore&);
virtual void backingStoreWasCreated(RemoteLayerBackingStore&);
virtual void backingStoreWillBeDestroyed(RemoteLayerBackingStore&);
void purgeFrontBufferForTesting(RemoteLayerBackingStore&);
void purgeBackBufferForTesting(RemoteLayerBackingStore&);
// Return value indicates whether the backing store needs to be included in the transaction.
bool backingStoreWillBeDisplayed(RemoteLayerBackingStore&);
bool backingStoreWillBeDisplayedWithRenderingSuppression(RemoteLayerBackingStore&);
void backingStoreBecameUnreachable(RemoteLayerBackingStore&);
virtual void prepareBackingStoresForDisplay(RemoteLayerTreeTransaction&);
virtual bool paintReachableBackingStoreContents();
void willFlushLayers();
void willBuildTransaction();
void willCommitLayerTree(RemoteLayerTreeTransaction&);
Vector<std::unique_ptr<ThreadSafeImageBufferSetFlusher>> didFlushLayers(RemoteLayerTreeTransaction&);
virtual void tryMarkAllBackingStoreVolatile(CompletionHandler<void(bool)>&&);
void scheduleVolatilityTimer();
virtual void gpuProcessConnectionWasDestroyed();
RemoteLayerTreeContext& layerTreeContext() const;
protected:
enum class VolatilityMarkingBehavior : uint8_t {
IgnoreReachability = 1 << 0,
ConsiderTimeSinceLastDisplay = 1 << 1,
};
virtual void markBackingStoreVolatileAfterReachabilityChange(RemoteLayerBackingStore&);
virtual void markAllBackingStoreVolatileFromTimer();
bool collectRemoteRenderingBackingStoreBufferIdentifiersToMarkVolatile(RemoteLayerWithRemoteRenderingBackingStore&, OptionSet<VolatilityMarkingBehavior>, MonotonicTime now, Vector<std::pair<Ref<RemoteImageBufferSetProxy>, OptionSet<BufferInSetType>>>&);
bool collectAllRemoteRenderingBufferIdentifiersToMarkVolatile(OptionSet<VolatilityMarkingBehavior> liveBackingStoreMarkingBehavior, OptionSet<VolatilityMarkingBehavior> unparentedBackingStoreMarkingBehavior, Vector<std::pair<Ref<RemoteImageBufferSetProxy>, OptionSet<BufferInSetType>>>&);
private:
bool markInProcessBackingStoreVolatile(RemoteLayerWithInProcessRenderingBackingStore&, OptionSet<VolatilityMarkingBehavior> = { }, MonotonicTime = { });
bool markAllBackingStoreVolatile(OptionSet<VolatilityMarkingBehavior> liveBackingStoreMarkingBehavior, OptionSet<VolatilityMarkingBehavior> unparentedBackingStoreMarkingBehavior);
bool updateUnreachableBackingStores();
void volatilityTimerFired();
Ref<RemoteLayerTreeContext> protectedLayerTreeContext() const;
protected:
void sendMarkBuffersVolatile(Vector<std::pair<Ref<RemoteImageBufferSetProxy>, OptionSet<BufferInSetType>>>&&, CompletionHandler<void(bool)>&&, bool forcePurge = false);
static constexpr auto volatileBackingStoreAgeThreshold = 1_s;
static constexpr auto volatileSecondaryBackingStoreAgeThreshold = 200_ms;
WeakRef<RemoteLayerTreeContext> m_layerTreeContext;
WeakHashSet<RemoteLayerBackingStore> m_liveBackingStore;
WeakHashSet<RemoteLayerBackingStore> m_unparentedBackingStore;
// Only used during a single flush.
WeakHashSet<RemoteLayerBackingStore> m_reachableBackingStoreInLatestFlush;
WeakHashSet<RemoteLayerBackingStore> m_backingStoresNeedingDisplay;
WebCore::Timer m_volatilityTimer;
bool m_inLayerFlush { false };
};
} // namespace WebKit
|
