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
|
// Copyright (c) 2012 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 "chrome/browser/favicon/favicon_util.h"
#include "chrome/browser/history/history_types.h"
#include "chrome/browser/history/select_favicon_frames.h"
#include "content/public/browser/render_view_host.h"
#include "googleurl/src/gurl.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/image/image_png_rep.h"
#include "ui/gfx/image/image_skia.h"
namespace {
// Creates image reps of DIP size |favicon_size| for the subset of
// |scale_factors| for which the image reps can be created without resizing
// or decoding the bitmap data.
std::vector<gfx::ImagePNGRep> SelectFaviconFramesFromPNGsWithoutResizing(
const std::vector<history::FaviconBitmapResult>& png_data,
const std::vector<ui::ScaleFactor>& scale_factors,
int favicon_size) {
std::vector<gfx::ImagePNGRep> png_reps;
if (png_data.empty())
return png_reps;
// A |favicon_size| of 0 indicates that the largest frame is desired.
if (favicon_size == 0 && scale_factors.size() == 1) {
int maximum_area = 0;
scoped_refptr<base::RefCountedMemory> best_candidate;
for (size_t i = 0; i < png_data.size(); ++i) {
int area = png_data[i].pixel_size.GetArea();
if (area > maximum_area) {
maximum_area = area;
best_candidate = png_data[i].bitmap_data;
}
}
png_reps.push_back(gfx::ImagePNGRep(best_candidate,
scale_factors[0]));
return png_reps;
}
// Cache the scale factor for each pixel size as |scale_factors| may contain
// any of GetFaviconScaleFactors() which may include scale factors not
// supported by the platform. (ui::GetScaleFactorFromScale() cannot be used.)
std::map<int, ui::ScaleFactor> desired_pixel_sizes;
for (size_t i = 0; i < scale_factors.size(); ++i) {
int pixel_size = floor(favicon_size *
ui::GetScaleFactorScale(scale_factors[i]));
desired_pixel_sizes[pixel_size] = scale_factors[i];
}
for (size_t i = 0; i < png_data.size(); ++i) {
if (!png_data[i].is_valid())
continue;
const gfx::Size& pixel_size = png_data[i].pixel_size;
if (pixel_size.width() != pixel_size.height())
continue;
std::map<int, ui::ScaleFactor>::iterator it = desired_pixel_sizes.find(
pixel_size.width());
if (it == desired_pixel_sizes.end())
continue;
png_reps.push_back(gfx::ImagePNGRep(png_data[i].bitmap_data, it->second));
}
return png_reps;
}
} // namespace
// static
std::vector<ui::ScaleFactor> FaviconUtil::GetFaviconScaleFactors() {
const float kScale1x = ui::GetScaleFactorScale(ui::SCALE_FACTOR_100P);
std::vector<ui::ScaleFactor> favicon_scale_factors =
ui::GetSupportedScaleFactors();
// The scale factors returned from ui::GetSupportedScaleFactors() are sorted.
// Insert the 1x scale factor such that GetFaviconScaleFactors() is sorted as
// well.
size_t insert_index = favicon_scale_factors.size();
for (size_t i = 0; i < favicon_scale_factors.size(); ++i) {
float scale = ui::GetScaleFactorScale(favicon_scale_factors[i]);
if (scale == kScale1x) {
return favicon_scale_factors;
} else if (scale > kScale1x) {
insert_index = i;
break;
}
}
// TODO(ios): 100p should not be necessary on iOS retina devices. However
// the sync service only supports syncing 100p favicons. Until sync supports
// other scales 100p is needed in the list of scale factors to retrieve and
// store the favicons in both 100p for sync and 200p for display. cr/160503.
favicon_scale_factors.insert(favicon_scale_factors.begin() + insert_index,
ui::SCALE_FACTOR_100P);
return favicon_scale_factors;
}
// static
gfx::Image FaviconUtil::SelectFaviconFramesFromPNGs(
const std::vector<history::FaviconBitmapResult>& png_data,
const std::vector<ui::ScaleFactor> scale_factors,
int favicon_size) {
// Create image reps for as many scale factors as possible without resizing
// the bitmap data or decoding it. FaviconHandler stores already resized
// favicons into history so no additional resizing should be needed in the
// common case.
// Creating the gfx::Image from |png_data| without resizing or decoding if
// possible is important because:
// - Sync does a byte-to-byte comparison of gfx::Image::As1xPNGBytes() to
// the data it put into the database in order to determine whether any
// updates should be pushed to sync.
// - The decoding occurs on the UI thread and the decoding can be a
// significant performance hit if a user has many bookmarks.
// TODO(pkotwicz): Move the decoding off the UI thread.
std::vector<gfx::ImagePNGRep> png_reps =
SelectFaviconFramesFromPNGsWithoutResizing(png_data, scale_factors,
favicon_size);
std::vector<ui::ScaleFactor> scale_factors_to_generate = scale_factors;
for (size_t i = 0; i < png_reps.size(); ++i) {
std::vector<ui::ScaleFactor>::iterator it = std::find(
scale_factors_to_generate.begin(),
scale_factors_to_generate.end(),
png_reps[i].scale_factor);
CHECK(it != scale_factors_to_generate.end());
scale_factors_to_generate.erase(it);
}
if (scale_factors_to_generate.empty())
return gfx::Image(png_reps);
std::vector<SkBitmap> bitmaps;
for (size_t i = 0; i < png_data.size(); ++i) {
if (!png_data[i].is_valid())
continue;
SkBitmap bitmap;
if (gfx::PNGCodec::Decode(png_data[i].bitmap_data->front(),
png_data[i].bitmap_data->size(),
&bitmap)) {
bitmaps.push_back(bitmap);
}
}
if (bitmaps.empty())
return gfx::Image();
gfx::ImageSkia resized_image_skia = SelectFaviconFrames(bitmaps,
scale_factors_to_generate, favicon_size, NULL);
if (png_reps.empty())
return gfx::Image(resized_image_skia);
std::vector<gfx::ImageSkiaRep> resized_image_skia_reps =
resized_image_skia.image_reps();
for (size_t i = 0; i < resized_image_skia_reps.size(); ++i) {
scoped_refptr<base::RefCountedBytes> png_bytes(new base::RefCountedBytes());
if (gfx::PNGCodec::EncodeBGRASkBitmap(
resized_image_skia_reps[i].sk_bitmap(), false, &png_bytes->data())) {
png_reps.push_back(gfx::ImagePNGRep(png_bytes,
resized_image_skia_reps[i].scale_factor()));
}
}
return gfx::Image(png_reps);
}
// static
size_t FaviconUtil::SelectBestFaviconFromBitmaps(
const std::vector<SkBitmap>& bitmaps,
const std::vector<ui::ScaleFactor>& scale_factors,
int desired_size) {
std::vector<gfx::Size> sizes;
for (size_t i = 0; i < bitmaps.size(); ++i)
sizes.push_back(gfx::Size(bitmaps[i].width(), bitmaps[i].height()));
std::vector<size_t> selected_bitmap_indices;
SelectFaviconFrameIndices(sizes, scale_factors, desired_size,
&selected_bitmap_indices, NULL);
DCHECK_EQ(1u, selected_bitmap_indices.size());
return selected_bitmap_indices[0];
}
|
