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) 2017 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 "CanvasNoiseInjection.h"
#include "FloatRect.h"
#include "IntSize.h"
#include "PixelBuffer.h"
#include "TaskSource.h"
#include <atomic>
#include <wtf/AbstractRefCountedAndCanMakeWeakPtr.h>
#include <wtf/HashSet.h>
#include <wtf/TypeCasts.h>
#include <wtf/WeakHashSet.h>
namespace WebCore {
class CanvasDisplayBufferObserver;
}
namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::CanvasDisplayBufferObserver> : std::true_type { };
}
namespace WebCore {
class AffineTransform;
class CanvasBase;
class CanvasObserver;
class CanvasRenderingContext;
class Element;
class Event;
class GraphicsContext;
class GraphicsContextStateSaver;
class Image;
class ImageBuffer;
class IntRect;
class ScriptExecutionContext;
class SecurityOrigin;
class WebCoreOpaqueRoot;
struct CSSParserContext;
enum class ShouldApplyPostProcessingToDirtyRect : bool { No, Yes };
class CanvasDisplayBufferObserver : public CanMakeWeakPtr<CanvasDisplayBufferObserver> {
public:
virtual ~CanvasDisplayBufferObserver() = default;
virtual void canvasDisplayBufferPrepared(CanvasBase&) = 0;
};
class CanvasBase : public AbstractRefCountedAndCanMakeWeakPtr<CanvasBase> {
public:
virtual ~CanvasBase();
virtual bool isHTMLCanvasElement() const { return false; }
virtual bool isOffscreenCanvas() const { return false; }
virtual bool isCustomPaintCanvas() const { return false; }
virtual unsigned width() const { return m_size.width(); }
virtual unsigned height() const { return m_size.height(); }
const IntSize& size() const { return m_size; }
ImageBuffer* buffer() const;
virtual void setImageBufferAndMarkDirty(RefPtr<ImageBuffer>&&) { }
RefPtr<ImageBuffer> makeRenderingResultsAvailable(ShouldApplyPostProcessingToDirtyRect = ShouldApplyPostProcessingToDirtyRect::Yes);
size_t memoryCost() const;
#if ENABLE(RESOURCE_USAGE)
size_t externalMemoryCost() const;
#endif
void setOriginClean() { m_originClean = true; }
void setOriginTainted() { m_originClean = false; }
bool originClean() const { return m_originClean; }
virtual SecurityOrigin* securityOrigin() const { return nullptr; }
ScriptExecutionContext* scriptExecutionContext() const { return canvasBaseScriptExecutionContext(); }
virtual CanvasRenderingContext* renderingContext() const = 0;
virtual const CSSParserContext& cssParserContext() const = 0;
void addObserver(CanvasObserver&);
void removeObserver(CanvasObserver&);
bool hasObserver(CanvasObserver&) const;
void notifyObserversCanvasChanged(const FloatRect&);
void notifyObserversCanvasResized();
void notifyObserversCanvasDestroyed(); // Must be called in destruction before clearing m_context.
void addDisplayBufferObserver(CanvasDisplayBufferObserver&);
void removeDisplayBufferObserver(CanvasDisplayBufferObserver&);
void notifyObserversCanvasDisplayBufferPrepared();
bool hasDisplayBufferObservers() const { return !m_displayBufferObservers.isEmptyIgnoringNullReferences(); }
UncheckedKeyHashSet<Element*> cssCanvasClients() const;
// !rect means caller knows the full canvas is invalidated previously.
void didDraw(const std::optional<FloatRect>& rect) { return didDraw(rect, ShouldApplyPostProcessingToDirtyRect::Yes); }
virtual void didDraw(const std::optional<FloatRect>&, ShouldApplyPostProcessingToDirtyRect);
virtual Image* copiedImage() const = 0;
virtual void clearCopiedImage() const = 0;
bool hasActiveInspectorCanvasCallTracer() const;
bool shouldAccelerate(const IntSize&) const;
WEBCORE_EXPORT static void setMaxCanvasAreaForTesting(std::optional<size_t>);
virtual void queueTaskKeepingObjectAlive(TaskSource, Function<void()>&&) = 0;
virtual void dispatchEvent(Event&) = 0;
bool postProcessPixelBufferResults(Ref<PixelBuffer>&&) const;
void recordLastFillText(const String&);
void resetGraphicsContextState() const;
void setNoiseInjectionSalt(NoiseInjectionHashSalt salt) { m_canvasNoiseHashSalt = salt; }
bool havePendingCanvasNoiseInjection() const { return m_canvasNoiseInjection.haveDirtyRects(); }
// FIXME(https://bugs.webkit.org/show_bug.cgi?id=275100): The image buffer from CanvasBase should be moved to CanvasRenderingContext2DBase.
RefPtr<ImageBuffer> allocateImageBuffer() const;
void setHasCreatedImageBuffer(bool hasCreatedImageBuffer) { m_hasCreatedImageBuffer = hasCreatedImageBuffer; }
bool hasCreatedImageBuffer() const { return m_hasCreatedImageBuffer; }
RefPtr<ImageBuffer> createImageForNoiseInjection() const;
protected:
explicit CanvasBase(IntSize, ScriptExecutionContext&);
virtual ScriptExecutionContext* canvasBaseScriptExecutionContext() const = 0;
virtual void setSize(const IntSize&);
RefPtr<ImageBuffer> setImageBuffer(RefPtr<ImageBuffer>&&) const;
String lastFillText() const { return m_lastFillText; }
void addCanvasNeedingPreparationForDisplayOrFlush();
void removeCanvasNeedingPreparationForDisplayOrFlush();
private:
bool shouldInjectNoiseBeforeReadback() const;
virtual void createImageBuffer() const { }
bool shouldAccelerate(uint64_t area) const;
mutable IntSize m_size;
mutable RefPtr<ImageBuffer> m_imageBuffer;
mutable std::atomic<size_t> m_imageBufferMemoryCost { 0 };
mutable std::unique_ptr<GraphicsContextStateSaver> m_contextStateSaver;
String m_lastFillText;
WeakHashSet<CanvasObserver> m_observers;
WeakHashSet<CanvasDisplayBufferObserver> m_displayBufferObservers;
CanvasNoiseInjection m_canvasNoiseInjection;
Markable<NoiseInjectionHashSalt, IntegralMarkableTraits<NoiseInjectionHashSalt, std::numeric_limits<int64_t>::max()>> m_canvasNoiseHashSalt;
bool m_originClean { true };
// m_hasCreatedImageBuffer means we tried to malloc the buffer. We didn't necessarily get it.
bool m_hasCreatedImageBuffer { false };
#if ASSERT_ENABLED
bool m_didNotifyObserversCanvasDestroyed { false };
#endif
};
WebCoreOpaqueRoot root(CanvasBase*);
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_CANVAS(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(ToValueTypeName) \
static bool isType(const WebCore::CanvasBase& canvas) { return canvas.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
|
