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
|
/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2011 Samsung Electronics
* Copyright (C) 2011,2014 Igalia S.L.
*
* 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 "BackingStore.h"
#if USE(CAIRO) || PLATFORM(GTK)
#include "UpdateInfo.h"
#include <WebCore/IntRect.h>
#include <WebCore/ShareableBitmap.h>
#include <cairo.h>
#if USE(CAIRO)
#include <WebCore/CairoUtilities.h>
#include <WebCore/GraphicsContextCairo.h>
#endif
#if USE(SKIA)
#include <WebCore/GraphicsContextSkia.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <skia/core/SkCanvas.h>
#include <skia/core/SkSurface.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
#endif
namespace WebKit {
using namespace WebCore;
static const Seconds s_scrollHysteresisDuration { 300_ms };
static RefPtr<cairo_surface_t> createCairoImageSurfaceWithFastMalloc(const IntSize& size, double deviceScaleFactor)
{
ASSERT(!size.isEmpty());
IntSize scaledSize(size);
scaledSize.scale(deviceScaleFactor);
static cairo_user_data_key_t s_surfaceDataKey;
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, scaledSize.width());
auto* surfaceData = fastZeroedMalloc(scaledSize.height() * stride);
RefPtr<cairo_surface_t> surface = adoptRef(cairo_image_surface_create_for_data(static_cast<unsigned char*>(surfaceData), CAIRO_FORMAT_ARGB32, scaledSize.width(), scaledSize.height(), stride));
cairo_surface_set_user_data(surface.get(), &s_surfaceDataKey, surfaceData, [](void* data) { fastFree(data); });
cairo_surface_set_device_scale(surface.get(), deviceScaleFactor, deviceScaleFactor);
return surface;
}
BackingStore::BackingStore(const IntSize& size, float deviceScaleFactor)
: m_size(size)
, m_deviceScaleFactor(deviceScaleFactor)
, m_surface(createCairoImageSurfaceWithFastMalloc(m_size, m_deviceScaleFactor))
, m_scrolledHysteresis([this](PAL::HysteresisState state) { if (state == PAL::HysteresisState::Stopped) m_scrollSurface = nullptr; }, s_scrollHysteresisDuration)
{
}
BackingStore::~BackingStore()
{
}
void BackingStore::paint(PlatformPaintContextPtr cr, const IntRect& rect)
{
cairo_save(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr, m_surface.get(), 0, 0);
cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
cairo_fill(cr);
cairo_restore(cr);
}
void BackingStore::incorporateUpdate(UpdateInfo&& updateInfo)
{
ASSERT(m_size == updateInfo.viewSize);
if (!updateInfo.bitmapHandle)
return;
auto bitmap = ShareableBitmap::create(WTFMove(*updateInfo.bitmapHandle));
if (!bitmap)
return;
#if ASSERT_ENABLED
IntSize updateSize = expandedIntSize(updateInfo.updateRectBounds.size() * m_deviceScaleFactor);
ASSERT(bitmap->size() == updateSize);
#endif
scroll(updateInfo.scrollRect, updateInfo.scrollOffset);
// Paint all update rects.
IntPoint updateRectLocation = updateInfo.updateRectBounds.location();
#if USE(CAIRO)
GraphicsContextCairo graphicsContext(m_surface.get());
// When m_webPageProxy.drawsBackground() is false, bitmap contains transparent parts as a background of the webpage.
// For such case, bitmap must be drawn using CompositeOperator::Copy to overwrite the existing surface.
graphicsContext.setCompositeOperation(WebCore::CompositeOperator::Copy);
for (const auto& updateRect : updateInfo.updateRects) {
IntRect srcRect = updateRect;
srcRect.move(-updateRectLocation.x(), -updateRectLocation.y());
bitmap->paint(graphicsContext, m_deviceScaleFactor, updateRect.location(), srcRect);
}
#elif USE(SKIA)
cairo_surface_flush(m_surface.get());
auto imageInfo = SkImageInfo::MakeN32Premul(cairo_image_surface_get_width(m_surface.get()), cairo_image_surface_get_height(m_surface.get()) , SkColorSpace::MakeSRGB());
auto surface = SkSurfaces::WrapPixels(imageInfo, cairo_image_surface_get_data(m_surface.get()), cairo_image_surface_get_stride(m_surface.get()), nullptr);
SkCanvas* canvas = surface ? surface->getCanvas() : nullptr;
if (!canvas)
return;
GraphicsContextSkia graphicsContext(*canvas, RenderingMode::Unaccelerated, RenderingPurpose::ShareableLocalSnapshot);
graphicsContext.setCompositeOperation(WebCore::CompositeOperator::Copy);
for (const auto& updateRect : updateInfo.updateRects) {
IntRect srcRect(updateRect);
srcRect.move(-updateRectLocation.x(), -updateRectLocation.y());
bitmap->paint(graphicsContext, m_deviceScaleFactor, updateRect.location(), srcRect);
IntRect damage(updateRect.location(), srcRect.size());
damage.scale(m_deviceScaleFactor);
cairo_surface_mark_dirty_rectangle(m_surface.get(), damage.x(), damage.y(), damage.width(), damage.height());
}
#endif
}
void BackingStore::scroll(const IntRect& scrollRect, const IntSize& scrollOffset)
{
if (scrollOffset.isZero())
return;
IntRect targetRect = scrollRect;
targetRect.move(scrollOffset);
targetRect.intersect(scrollRect);
if (targetRect.isEmpty())
return;
if (!m_scrollSurface)
m_scrollSurface = createCairoImageSurfaceWithFastMalloc(m_size, m_deviceScaleFactor);
#if USE(SKIA)
auto copyRectFromOneSurfaceToAnother = [](cairo_surface_t* src, cairo_surface_t* dst, const IntSize& sourceOffset, const IntRect& rect) {
RefPtr<cairo_t> cr = adoptRef(cairo_create(dst));
cairo_set_operator(cr.get(), CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr.get(), src, sourceOffset.width(), sourceOffset.height());
cairo_rectangle(cr.get(), rect.x(), rect.y(), rect.width(), rect.height());
cairo_fill(cr.get());
};
#endif
copyRectFromOneSurfaceToAnother(m_surface.get(), m_scrollSurface.get(), scrollOffset, targetRect);
copyRectFromOneSurfaceToAnother(m_scrollSurface.get(), m_surface.get(), { }, targetRect);
m_scrolledHysteresis.impulse();
}
} // namespace WebKit
#endif // USE(CAIRO) || PLATFORM(GTK)
|
