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
|
/*
* Copyright (C) 2011 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SVGImageCache.h"
#if ENABLE(SVG)
#include "CachedImage.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "ImageBuffer.h"
#include "Page.h"
#include "RenderSVGRoot.h"
#include "SVGImage.h"
namespace WebCore {
SVGImageCache::SVGImageCache(SVGImage* svgImage)
: m_svgImage(svgImage)
, m_redrawTimer(this, &SVGImageCache::redrawTimerFired)
{
ASSERT(m_svgImage);
}
SVGImageCache::~SVGImageCache()
{
m_sizeAndScalesMap.clear();
ImageDataMap::iterator end = m_imageDataMap.end();
for (ImageDataMap::iterator it = m_imageDataMap.begin(); it != end; ++it) {
// Checks if the client (it->key) is still valid. The client should remove itself from this
// cache before its end of life, otherwise the following ASSERT will crash on pure virtual
// function call or a general crash.
ASSERT(it->key->resourceClientType() == CachedImageClient::expectedType());
delete it->value.buffer;
}
m_imageDataMap.clear();
}
void SVGImageCache::removeClientFromCache(const CachedImageClient* client)
{
ASSERT(client);
m_sizeAndScalesMap.remove(client);
ImageDataMap::iterator it = m_imageDataMap.find(client);
if (it == m_imageDataMap.end())
return;
delete it->value.buffer;
m_imageDataMap.remove(it);
}
void SVGImageCache::setRequestedSizeAndScales(const CachedImageClient* client, const SizeAndScales& sizeAndScales)
{
ASSERT(client);
ASSERT(!sizeAndScales.size.isEmpty());
m_sizeAndScalesMap.set(client, sizeAndScales);
}
SVGImageCache::SizeAndScales SVGImageCache::requestedSizeAndScales(const CachedImageClient* client) const
{
if (!client)
return SizeAndScales();
SizeAndScalesMap::const_iterator it = m_sizeAndScalesMap.find(client);
if (it == m_sizeAndScalesMap.end())
return SizeAndScales();
return it->value;
}
void SVGImageCache::imageContentChanged()
{
ImageDataMap::iterator end = m_imageDataMap.end();
for (ImageDataMap::iterator it = m_imageDataMap.begin(); it != end; ++it)
it->value.imageNeedsUpdate = true;
// Always redraw on a timer because this method may be invoked from destructors of things we are intending to draw.
if (!m_redrawTimer.isActive())
m_redrawTimer.startOneShot(0);
}
void SVGImageCache::redraw()
{
ImageDataMap::iterator end = m_imageDataMap.end();
for (ImageDataMap::iterator it = m_imageDataMap.begin(); it != end; ++it) {
ImageData& data = it->value;
if (!data.imageNeedsUpdate)
continue;
// If the content changed we redraw using our existing ImageBuffer.
ASSERT(data.buffer);
ASSERT(data.image);
m_svgImage->drawSVGToImageBuffer(data.buffer, data.sizeAndScales.size, data.sizeAndScales.zoom, data.sizeAndScales.scale, SVGImage::ClearImageBuffer);
data.image = data.buffer->copyImage(CopyBackingStore);
data.imageNeedsUpdate = false;
}
ASSERT(m_svgImage->imageObserver());
m_svgImage->imageObserver()->animationAdvanced(m_svgImage);
}
void SVGImageCache::redrawTimerFired(Timer<SVGImageCache>*)
{
// We have no guarantee that the frame does not require layout when the timer fired.
// So be sure to check again in case it is still not safe to run redraw.
FrameView* frameView = m_svgImage->frameView();
if (frameView && (frameView->needsLayout() || frameView->isInLayout())) {
if (!m_redrawTimer.isActive())
m_redrawTimer.startOneShot(0);
} else
redraw();
}
Image* SVGImageCache::lookupOrCreateBitmapImageForRenderer(const RenderObject* renderer)
{
if (!renderer)
return Image::nullImage();
const CachedImageClient* client = renderer;
// The cache needs to know the size of the renderer before querying an image for it.
SizeAndScalesMap::iterator sizeIt = m_sizeAndScalesMap.find(renderer);
if (sizeIt == m_sizeAndScalesMap.end())
return Image::nullImage();
IntSize size = sizeIt->value.size;
float zoom = sizeIt->value.zoom;
float scale = sizeIt->value.scale;
// FIXME (85335): This needs to take CSS transform scale into account as well.
Page* page = renderer->document()->page();
if (!scale)
scale = page->deviceScaleFactor() * page->pageScaleFactor();
ASSERT(!size.isEmpty());
// Lookup image for client in cache and eventually update it.
ImageDataMap::iterator it = m_imageDataMap.find(client);
if (it != m_imageDataMap.end()) {
ImageData& data = it->value;
// Common case: image size & zoom remained the same.
if (data.sizeAndScales.size == size && data.sizeAndScales.zoom == zoom && data.sizeAndScales.scale == scale)
return data.image.get();
// If the image size for the client changed, we have to delete the buffer, remove the item from the cache and recreate it.
delete data.buffer;
m_imageDataMap.remove(it);
}
FloatSize scaledSize(size);
scaledSize.scale(scale);
// Create and cache new image and image buffer at requested size.
OwnPtr<ImageBuffer> newBuffer = ImageBuffer::create(expandedIntSize(scaledSize), 1);
if (!newBuffer)
return Image::nullImage();
m_svgImage->drawSVGToImageBuffer(newBuffer.get(), size, zoom, scale, SVGImage::DontClearImageBuffer);
RefPtr<Image> newImage = newBuffer->copyImage(CopyBackingStore);
Image* newImagePtr = newImage.get();
ASSERT(newImagePtr);
m_imageDataMap.add(client, ImageData(newBuffer.leakPtr(), newImage.release(), SizeAndScales(size, zoom, scale)));
return newImagePtr;
}
} // namespace WebCore
#endif // ENABLE(SVG)
|
