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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* Copyright (C) 2013-2018 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
#include "ImageBufferBackendHandle.h"
#include <WebCore/FloatRect.h>
#include <WebCore/IOSurface.h>
#include <WebCore/Region.h>
#include <wtf/MachSendRight.h>
#include <wtf/MonotonicTime.h>
OBJC_CLASS CALayer;
// FIXME: Make PlatformCALayerRemote.cpp Objective-C so we can include WebLayer.h here and share the typedef.
namespace WebCore {
class NativeImage;
class ThreadSafeImageBufferFlusher;
typedef Vector<WebCore::FloatRect, 5> RepaintRectList;
}
namespace WebKit {
class PlatformCALayerRemote;
class RemoteLayerBackingStoreCollection;
class RemoteLayerBackingStore {
WTF_MAKE_NONCOPYABLE(RemoteLayerBackingStore);
WTF_MAKE_FAST_ALLOCATED;
public:
RemoteLayerBackingStore(PlatformCALayerRemote*);
~RemoteLayerBackingStore();
enum class Type : uint8_t {
IOSurface,
Bitmap
};
enum class IncludeDisplayList : bool { No, Yes };
void ensureBackingStore(Type, WebCore::FloatSize, float scale, bool deepColor, bool isOpaque, IncludeDisplayList);
void setNeedsDisplay(const WebCore::IntRect);
void setNeedsDisplay();
void setContents(WTF::MachSendRight&& surfaceHandle);
// Returns true if the backing store changed.
bool display();
WebCore::FloatSize size() const { return m_size; }
float scale() const { return m_scale; }
WebCore::PixelFormat pixelFormat() const;
Type type() const { return m_type; }
bool isOpaque() const { return m_isOpaque; }
unsigned bytesPerPixel() const;
PlatformCALayerRemote* layer() const { return m_layer; }
enum class LayerContentsType { IOSurface, CAMachPort };
void applyBackingStoreToLayer(CALayer *, LayerContentsType, bool replayCGDisplayListsIntoBackingStore);
void encode(IPC::Encoder&) const;
static WARN_UNUSED_RETURN bool decode(IPC::Decoder&, RemoteLayerBackingStore&);
void enumerateRectsBeingDrawn(WebCore::GraphicsContext&, void (^)(WebCore::FloatRect));
bool hasFrontBuffer() const
{
return m_contentsBufferHandle || !!m_frontBuffer.imageBuffer;
}
// Just for RemoteBackingStoreCollection.
void applySwappedBuffers(RefPtr<WebCore::ImageBuffer>&& front, RefPtr<WebCore::ImageBuffer>&& back, RefPtr<WebCore::ImageBuffer>&& secondaryBack, bool frontBufferNeedsDisplay);
void swapToValidFrontBuffer();
Vector<std::unique_ptr<WebCore::ThreadSafeImageBufferFlusher>> takePendingFlushers();
enum class BufferType {
Front,
Back,
SecondaryBack
};
void willMakeBufferVolatile(BufferType);
void didMakeFrontBufferNonVolatile(WebCore::VolatilityState);
RefPtr<WebCore::ImageBuffer> bufferForType(BufferType) const;
// Returns true if it was able to fulfill the request. This can fail when trying to mark an in-use surface as volatile.
bool setBufferVolatility(BufferType, bool isVolatile);
MonotonicTime lastDisplayTime() const { return m_lastDisplayTime; }
void clearBackingStore();
private:
RemoteLayerBackingStoreCollection* backingStoreCollection() const;
void drawInContext(WebCore::GraphicsContext&);
struct Buffer {
RefPtr<WebCore::ImageBuffer> imageBuffer;
#if ENABLE(CG_DISPLAY_LIST_BACKED_IMAGE_BUFFER)
RefPtr<WebCore::ImageBuffer> displayListImageBuffer;
#endif
// FIXME: This flag needs to be part of ImageBuffer[Backend]. Currently it's not correctly maintained
// in the GPU Process code path.
bool isVolatile = false;
explicit operator bool() const
{
return !!imageBuffer;
}
void discard();
};
bool setBufferVolatile(Buffer&);
WebCore::VolatilityState setBufferNonVolatile(Buffer&);
void swapBuffers();
bool supportsPartialRepaint() const;
PlatformCALayerRemote* m_layer;
WebCore::FloatSize m_size;
float m_scale { 1.0f };
bool m_isOpaque { false };
WebCore::Region m_dirtyRegion;
// Used in the WebContent Process.
Buffer m_frontBuffer;
Buffer m_backBuffer;
Buffer m_secondaryBackBuffer;
// Used in the UI Process.
std::optional<ImageBufferBackendHandle> m_bufferHandle;
// FIXME: This should be removed and m_bufferHandle should be used to ref the buffer once ShareableBitmap::Handle
// can be encoded multiple times. http://webkit.org/b/234169
std::optional<MachSendRight> m_contentsBufferHandle;
#if ENABLE(CG_DISPLAY_LIST_BACKED_IMAGE_BUFFER)
std::optional<ImageBufferBackendHandle> m_displayListBufferHandle;
#endif
Vector<std::unique_ptr<WebCore::ThreadSafeImageBufferFlusher>> m_frontBufferFlushers;
Type m_type;
IncludeDisplayList m_includeDisplayList { IncludeDisplayList::No };
bool m_deepColor { false };
WebCore::RepaintRectList m_paintingRects;
MonotonicTime m_lastDisplayTime;
};
} // namespace WebKit
namespace WTF {
template<> struct EnumTraits<WebKit::RemoteLayerBackingStore::Type> {
using values = EnumValues<
WebKit::RemoteLayerBackingStore::Type,
WebKit::RemoteLayerBackingStore::Type::IOSurface,
WebKit::RemoteLayerBackingStore::Type::Bitmap
>;
};
template<> struct EnumTraits<WebKit::RemoteLayerBackingStore::IncludeDisplayList> {
using values = EnumValues<
WebKit::RemoteLayerBackingStore::IncludeDisplayList,
WebKit::RemoteLayerBackingStore::IncludeDisplayList::No,
WebKit::RemoteLayerBackingStore::IncludeDisplayList::Yes
>;
};
} // namespace WTF
|
