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
138
139
140
141
142
143
|
/*
* Copyright (C) 2011 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#ifndef DrawingAreaImpl_h
#define DrawingAreaImpl_h
#include "DrawingArea.h"
#include "LayerTreeHost.h"
#include <WebCore/Region.h>
#include <WebCore/RunLoop.h>
namespace WebCore {
class GraphicsContext;
}
namespace WebKit {
class ShareableBitmap;
class UpdateInfo;
class DrawingAreaImpl : public DrawingArea {
public:
static PassOwnPtr<DrawingAreaImpl> create(WebPage*, const WebPageCreationParameters&);
virtual ~DrawingAreaImpl();
void layerHostDidFlushLayers();
private:
DrawingAreaImpl(WebPage*, const WebPageCreationParameters&);
// DrawingArea
virtual void setNeedsDisplay(const WebCore::IntRect&);
virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
virtual void setLayerTreeStateIsFrozen(bool);
virtual bool layerTreeStateIsFrozen() const { return m_layerTreeStateIsFrozen; }
virtual void forceRepaint();
virtual void didInstallPageOverlay();
virtual void didUninstallPageOverlay();
virtual void setPageOverlayNeedsDisplay(const WebCore::IntRect&);
virtual void setPaintingEnabled(bool);
virtual void setRootCompositingLayer(WebCore::GraphicsLayer*);
virtual void scheduleCompositingLayerSync();
#if PLATFORM(WIN)
virtual void scheduleChildWindowGeometryUpdate(const WindowGeometry&);
#endif
#if USE(ACCELERATED_COMPOSITING) && USE(TEXTURE_MAPPER) && USE(TILED_BACKING_STORE)
virtual void didReceiveLayerTreeHostMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*);
#endif
// CoreIPC message handlers.
virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset);
virtual void didUpdate();
virtual void suspendPainting();
virtual void resumePainting();
virtual void pageCustomRepresentationChanged();
void sendDidUpdateBackingStoreState();
void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*);
void exitAcceleratedCompositingModeSoon();
bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); }
void exitAcceleratedCompositingMode();
void scheduleDisplay();
void displayTimerFired();
void display();
void display(UpdateInfo&);
PassOwnPtr<WebCore::GraphicsContext> createGraphicsContext(ShareableBitmap*);
uint64_t m_backingStoreStateID;
WebCore::Region m_dirtyRegion;
WebCore::IntRect m_scrollRect;
WebCore::IntSize m_scrollOffset;
// Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored.
bool m_isPaintingEnabled;
// Whether we're currently processing an UpdateBackingStoreState message.
bool m_inUpdateBackingStoreState;
// When true, we should send an UpdateBackingStoreState message instead of any other messages
// we normally send to the UI process.
bool m_shouldSendDidUpdateBackingStoreState;
// Whether we're waiting for a DidUpdate message. Used for throttling paints so that the
// web process won't paint more frequent than the UI process can handle.
bool m_isWaitingForDidUpdate;
// True between sending the 'enter compositing' messages, and the 'exit compositing' message.
bool m_compositingAccordingToProxyMessages;
// When true, we maintain the layer tree in its current state by not leaving accelerated compositing mode
// and not scheduling layer flushes.
bool m_layerTreeStateIsFrozen;
// True when we were asked to exit accelerated compositing mode but couldn't because layer tree
// state was frozen.
bool m_wantsToExitAcceleratedCompositingMode;
// Whether painting is suspended. We'll still keep track of the dirty region but we
// won't paint until painting has resumed again.
bool m_isPaintingSuspended;
bool m_alwaysUseCompositing;
WebCore::RunLoop::Timer<DrawingAreaImpl> m_displayTimer;
WebCore::RunLoop::Timer<DrawingAreaImpl> m_exitCompositingTimer;
// The layer tree host that handles accelerated compositing.
RefPtr<LayerTreeHost> m_layerTreeHost;
};
} // namespace WebKit
#endif // DrawingAreaImpl_h
|
