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
|
/*
* Copyright (C) 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. 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.
*/
#include "config.h"
#include "CustomPaintCanvas.h"
#if ENABLE(CSS_PAINTING_API)
#include "BitmapImage.h"
#include "CanvasRenderingContext.h"
#include "DisplayListDrawingContext.h"
#include "DisplayListRecorder.h"
#include "DisplayListReplayer.h"
#include "ImageBitmap.h"
#include "PaintRenderingContext2D.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
Ref<CustomPaintCanvas> CustomPaintCanvas::create(ScriptExecutionContext& context, unsigned width, unsigned height)
{
return adoptRef(*new CustomPaintCanvas(context, width, height));
}
CustomPaintCanvas::CustomPaintCanvas(ScriptExecutionContext& context, unsigned width, unsigned height)
: CanvasBase(IntSize(width, height), context.noiseInjectionHashSalt())
, ContextDestructionObserver(&context)
{
}
CustomPaintCanvas::~CustomPaintCanvas()
{
notifyObserversCanvasDestroyed();
m_context = nullptr; // Ensure this goes away before the ImageBuffer.
setImageBuffer(nullptr);
}
RefPtr<PaintRenderingContext2D> CustomPaintCanvas::getContext()
{
if (m_context)
return &downcast<PaintRenderingContext2D>(*m_context);
auto context = PaintRenderingContext2D::create(*this);
auto* contextPtr = context.get();
m_context = WTFMove(context);
return contextPtr;
}
void CustomPaintCanvas::replayDisplayList(GraphicsContext& target)
{
if (!width() || !height())
return;
// FIXME: Using an intermediate buffer is not needed if there are no composite operations.
auto clipBounds = target.clipBounds();
auto image = target.createAlignedImageBuffer(clipBounds.size());
if (!image)
return;
auto& imageTarget = image->context();
imageTarget.translate(-clipBounds.location());
replayDisplayListImpl(imageTarget);
target.drawImageBuffer(*image, clipBounds);
}
AffineTransform CustomPaintCanvas::baseTransform() const
{
// The base transform of the display list.
// FIXME: this is actually correct, but the display list will not behave correctly with respect to
// playback. The GraphicsContext should be fixed to start at identity transform, and the
// device transform should be a separate concept that the display list or context2d cannot reset.
return { };
}
Image* CustomPaintCanvas::copiedImage() const
{
if (!width() || !height())
return nullptr;
m_copiedImage = nullptr;
auto buffer = ImageBuffer::create(size(), RenderingPurpose::Unspecified, 1, DestinationColorSpace::SRGB(), PixelFormat::BGRA8);
if (buffer) {
replayDisplayListImpl(buffer->context());
m_copiedImage = BitmapImage::create(ImageBuffer::sinkIntoNativeImage(buffer));
}
return m_copiedImage.get();
}
void CustomPaintCanvas::clearCopiedImage() const
{
m_copiedImage = nullptr;
}
GraphicsContext* CustomPaintCanvas::drawingContext() const
{
if (!m_recordingContext)
m_recordingContext = makeUnique<DisplayList::DrawingContext>(size());
return &m_recordingContext->context();
}
GraphicsContext* CustomPaintCanvas::existingDrawingContext() const
{
return m_recordingContext ? &m_recordingContext->context() : nullptr;
}
void CustomPaintCanvas::replayDisplayListImpl(GraphicsContext& target) const
{
if (!m_recordingContext)
return;
auto& displayList = m_recordingContext->displayList();
if (!displayList.isEmpty()) {
DisplayList::Replayer replayer(target, displayList);
replayer.replay(FloatRect { { }, size() });
displayList.clear();
}
}
}
#endif
|
