1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "third_party/blink/renderer/platform/graphics/bitmap_image_metrics.h"
6
7 #include "base/metrics/histogram_base.h"
8 #include "base/numerics/safe_conversions.h"
9 #include "third_party/blink/renderer/platform/geometry/int_size.h"
10 #include "third_party/blink/renderer/platform/graphics/color_space_gamut.h"
11 #include "third_party/blink/renderer/platform/instrumentation/histogram.h"
12 #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
13 #include "third_party/blink/renderer/platform/wtf/threading.h"
14
15 namespace blink {
16
CountDecodedImageType(const String & type)17 void BitmapImageMetrics::CountDecodedImageType(const String& type) {
18 DecodedImageType decoded_image_type =
19 type == "jpg"
20 ? kImageJPEG
21 : type == "png"
22 ? kImagePNG
23 : type == "gif"
24 ? kImageGIF
25 : type == "webp"
26 ? kImageWebP
27 : type == "ico"
28 ? kImageICO
29 : type == "bmp"
30 ? kImageBMP
31 : DecodedImageType::kImageUnknown;
32
33 DEFINE_THREAD_SAFE_STATIC_LOCAL(
34 EnumerationHistogram, decoded_image_type_histogram,
35 ("Blink.DecodedImageType", kDecodedImageTypeEnumEnd));
36 decoded_image_type_histogram.Count(decoded_image_type);
37 }
38
CountImageOrientation(const ImageOrientationEnum orientation)39 void BitmapImageMetrics::CountImageOrientation(
40 const ImageOrientationEnum orientation) {
41 DEFINE_THREAD_SAFE_STATIC_LOCAL(
42 EnumerationHistogram, orientation_histogram,
43 ("Blink.DecodedImage.Orientation", kImageOrientationEnumEnd));
44 orientation_histogram.Count(orientation);
45 }
46
CountImageJpegDensity(int image_min_side,uint64_t density_centi_bpp,size_t image_size_bytes)47 void BitmapImageMetrics::CountImageJpegDensity(int image_min_side,
48 uint64_t density_centi_bpp,
49 size_t image_size_bytes) {
50 // All bpp samples are reported in the range 0.01 to 10 bpp as integer number
51 // of 0.01 bpp. We don't report for any sample for small images (0 to 99px on
52 // the smallest dimension).
53 //
54 // The histogram JpegDensity.KiBWeighted reports the number of KiB decoded for
55 // a given bpp value.
56
57 if (image_min_side >= 100) {
58 DEFINE_THREAD_SAFE_STATIC_LOCAL(
59 CustomCountHistogram, density_histogram,
60 ("Blink.DecodedImage.JpegDensity.KiBWeighted", 1, 1000, 100));
61 int image_size_kib = (image_size_bytes + 512) / 1024;
62 if (image_size_kib > 0) {
63 density_histogram.CountMany(
64 base::saturated_cast<base::Histogram::Sample>(density_centi_bpp),
65 image_size_kib);
66 }
67 }
68 }
69
CountJpegArea(const IntSize & size)70 void BitmapImageMetrics::CountJpegArea(const IntSize& size) {
71 DEFINE_THREAD_SAFE_STATIC_LOCAL(
72 CustomCountHistogram, image_area_histogram,
73 ("Blink.ImageDecoders.Jpeg.Area", 1 /* min */, 8192 * 8192 /* max */,
74 100 /* bucket_count */));
75 // A base::HistogramBase::Sample may not fit |size.Area()|. Hence the use of
76 // saturated_cast.
77 image_area_histogram.Count(
78 base::saturated_cast<base::HistogramBase::Sample>(size.Area()));
79 }
80
CountJpegColorSpace(JpegColorSpace color_space)81 void BitmapImageMetrics::CountJpegColorSpace(JpegColorSpace color_space) {
82 DEFINE_THREAD_SAFE_STATIC_LOCAL(
83 EnumerationHistogram, color_space_histogram,
84 ("Blink.ImageDecoders.Jpeg.ColorSpace", JpegColorSpace::kMaxValue));
85 color_space_histogram.Count(color_space);
86 }
87
88 } // namespace blink
89