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
|
// Copyright 2015 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 "third_party/blink/renderer/platform/graphics/bitmap_image_metrics.h"
#include "base/metrics/histogram_base.h"
#include "base/numerics/safe_conversions.h"
#include "third_party/blink/renderer/platform/geometry/int_size.h"
#include "third_party/blink/renderer/platform/graphics/color_space_gamut.h"
#include "third_party/blink/renderer/platform/histogram.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
#include "third_party/skia/third_party/skcms/skcms.h"
namespace blink {
void BitmapImageMetrics::CountDecodedImageType(const String& type) {
DecodedImageType decoded_image_type =
type == "jpg"
? kImageJPEG
: type == "png"
? kImagePNG
: type == "gif"
? kImageGIF
: type == "webp"
? kImageWebP
: type == "ico"
? kImageICO
: type == "bmp"
? kImageBMP
: DecodedImageType::kImageUnknown;
DEFINE_THREAD_SAFE_STATIC_LOCAL(
EnumerationHistogram, decoded_image_type_histogram,
("Blink.DecodedImageType", kDecodedImageTypeEnumEnd));
decoded_image_type_histogram.Count(decoded_image_type);
}
void BitmapImageMetrics::CountImageOrientation(
const ImageOrientationEnum orientation) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
EnumerationHistogram, orientation_histogram,
("Blink.DecodedImage.Orientation", kImageOrientationEnumEnd));
orientation_histogram.Count(orientation);
}
void BitmapImageMetrics::CountImageJpegDensity(int image_min_side,
uint64_t density_centi_bpp) {
// Values are reported in the range 0.01 to 10 bpp, in different metrics
// depending on the image category (small, medium, large).
if (image_min_side >= 1000) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
CustomCountHistogram, density_histogram,
("Blink.DecodedImage.JpegDensity.1000px", 1, 1000, 100));
density_histogram.Count(
base::saturated_cast<base::Histogram::Sample>(density_centi_bpp));
} else if (image_min_side >= 400) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
CustomCountHistogram, density_histogram,
("Blink.DecodedImage.JpegDensity.400px", 1, 1000, 100));
density_histogram.Count(
base::saturated_cast<base::Histogram::Sample>(density_centi_bpp));
} else if (image_min_side >= 100) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
CustomCountHistogram, density_histogram,
("Blink.DecodedImage.JpegDensity.100px", 1, 1000, 100));
density_histogram.Count(
base::saturated_cast<base::Histogram::Sample>(density_centi_bpp));
} else {
// We don't report for images with 0 to 99px on the smallest dimension.
}
}
void BitmapImageMetrics::CountImageGammaAndGamut(
const skcms_ICCProfile* color_profile) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, gamma_named_histogram,
("Blink.ColorSpace.Source", kGammaEnd));
gamma_named_histogram.Count(GetColorSpaceGamma(color_profile));
DEFINE_THREAD_SAFE_STATIC_LOCAL(
EnumerationHistogram, gamut_named_histogram,
("Blink.ColorGamut.Source", static_cast<int>(ColorSpaceGamut::kEnd)));
gamut_named_histogram.Count(static_cast<int>(
color_space_utilities::GetColorSpaceGamut(color_profile)));
}
void BitmapImageMetrics::CountJpegArea(const IntSize& size) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
CustomCountHistogram, image_area_histogram,
("Blink.ImageDecoders.Jpeg.Area", 1 /* min */, 8192 * 8192 /* max */,
100 /* bucket_count */));
// A base::HistogramBase::Sample may not fit |size.Area()|. Hence the use of
// saturated_cast.
image_area_histogram.Count(
base::saturated_cast<base::HistogramBase::Sample>(size.Area()));
}
void BitmapImageMetrics::CountJpegColorSpace(JpegColorSpace color_space) {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
EnumerationHistogram, color_space_histogram,
("Blink.ImageDecoders.Jpeg.ColorSpace", JpegColorSpace::kMaxValue));
color_space_histogram.Count(color_space);
}
BitmapImageMetrics::Gamma BitmapImageMetrics::GetColorSpaceGamma(
const skcms_ICCProfile* color_profile) {
Gamma gamma = kGammaNull;
if (color_profile) {
if (skcms_TRCs_AreApproximateInverse(
color_profile, skcms_sRGB_Inverse_TransferFunction())) {
gamma = kGammaSRGB;
} else if (skcms_TRCs_AreApproximateInverse(
color_profile, skcms_Identity_TransferFunction())) {
gamma = kGammaLinear;
} else {
gamma = kGammaNonStandard;
}
}
return gamma;
}
} // namespace blink
|
