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
|
// Copyright 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "cc/image_layer.h"
#include "base/compiler_specific.h"
#include "cc/layer_updater.h"
#include "cc/layer_tree_host.h"
#include "cc/resource_update_queue.h"
namespace cc {
class ImageLayerUpdater : public LayerUpdater {
public:
class Resource : public LayerUpdater::Resource {
public:
Resource(ImageLayerUpdater* updater, scoped_ptr<PrioritizedTexture> texture)
: LayerUpdater::Resource(texture.Pass())
, m_updater(updater)
{
}
virtual void update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&) OVERRIDE
{
updater()->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
}
private:
ImageLayerUpdater* updater() { return m_updater; }
ImageLayerUpdater* m_updater;
};
static scoped_refptr<ImageLayerUpdater> create()
{
return make_scoped_refptr(new ImageLayerUpdater());
}
virtual scoped_ptr<LayerUpdater::Resource> createResource(
PrioritizedTextureManager* manager) OVERRIDE
{
return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedTexture::create(manager)));
}
void updateTexture(ResourceUpdateQueue& queue, PrioritizedTexture* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
{
// Source rect should never go outside the image pixels, even if this
// is requested because the texture extends outside the image.
gfx::Rect clippedSourceRect = sourceRect;
gfx::Rect imageRect = gfx::Rect(0, 0, m_bitmap.width(), m_bitmap.height());
clippedSourceRect.Intersect(imageRect);
gfx::Vector2d clippedDestOffset = destOffset + (clippedSourceRect.origin() - sourceRect.origin());
ResourceUpdate upload = ResourceUpdate::Create(texture,
&m_bitmap,
imageRect,
clippedSourceRect,
clippedDestOffset);
if (partialUpdate)
queue.appendPartialUpload(upload);
else
queue.appendFullUpload(upload);
}
void setBitmap(const SkBitmap& bitmap)
{
m_bitmap = bitmap;
}
private:
ImageLayerUpdater() { }
virtual ~ImageLayerUpdater() { }
SkBitmap m_bitmap;
};
scoped_refptr<ImageLayer> ImageLayer::create()
{
return make_scoped_refptr(new ImageLayer());
}
ImageLayer::ImageLayer()
: TiledLayer()
{
}
ImageLayer::~ImageLayer()
{
}
void ImageLayer::setBitmap(const SkBitmap& bitmap)
{
// setBitmap() currently gets called whenever there is any
// style change that affects the layer even if that change doesn't
// affect the actual contents of the image (e.g. a CSS animation).
// With this check in place we avoid unecessary texture uploads.
if (bitmap.pixelRef() && bitmap.pixelRef() == m_bitmap.pixelRef())
return;
m_bitmap = bitmap;
setNeedsDisplay();
}
void ImageLayer::setTexturePriorities(const PriorityCalculator& priorityCalc)
{
// Update the tile data before creating all the layer's tiles.
updateTileSizeAndTilingOption();
TiledLayer::setTexturePriorities(priorityCalc);
}
void ImageLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker* occlusion, RenderingStats& stats)
{
createUpdaterIfNeeded();
if (m_needsDisplay) {
m_updater->setBitmap(m_bitmap);
updateTileSizeAndTilingOption();
invalidateContentRect(gfx::Rect(gfx::Point(), contentBounds()));
m_needsDisplay = false;
}
TiledLayer::update(queue, occlusion, stats);
}
void ImageLayer::createUpdaterIfNeeded()
{
if (m_updater)
return;
m_updater = ImageLayerUpdater::create();
GLenum textureFormat = layerTreeHost()->rendererCapabilities().bestTextureFormat;
setTextureFormat(textureFormat);
}
LayerUpdater* ImageLayer::updater() const
{
return m_updater.get();
}
gfx::Size ImageLayer::contentBounds() const
{
return gfx::Size(m_bitmap.width(), m_bitmap.height());
}
bool ImageLayer::drawsContent() const
{
return !m_bitmap.isNull() && TiledLayer::drawsContent();
}
float ImageLayer::contentsScaleX() const
{
if (bounds().IsEmpty() || contentBounds().IsEmpty())
return 1;
return static_cast<float>(m_bitmap.width()) / bounds().width();
}
float ImageLayer::contentsScaleY() const
{
if (bounds().IsEmpty() || contentBounds().IsEmpty())
return 1;
return static_cast<float>(m_bitmap.height()) / bounds().height();
}
} // namespace cc
|
