1// Copyright 2014 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 "chrome/browser/chromeos/login/users/avatar/user_image.h"
6
7#include "base/debug/trace_event.h"
8#include "third_party/skia/include/core/SkBitmap.h"
9#include "ui/gfx/codec/jpeg_codec.h"
10
11namespace chromeos {
12
13namespace {
14
15// Default quality for encoding user images.
16const int kDefaultEncodingQuality = 90;
17
18bool IsAnimatedImage(const UserImage::RawImage& data) {
19  const char kGIFStamp[] = "GIF";
20  const size_t kGIFStampLength = sizeof(kGIFStamp) - 1;
21
22  if (data.size() >= kGIFStampLength &&
23      memcmp(&data[0], kGIFStamp, kGIFStampLength) == 0) {
24    return true;
25  }
26  return false;
27}
28
29bool EncodeImageSkia(const gfx::ImageSkia& image,
30                     std::vector<unsigned char>* output) {
31  TRACE_EVENT2("oobe", "EncodeImageSkia",
32               "width", image.width(), "height", image.height());
33  if (image.isNull())
34    return false;
35  const SkBitmap& bitmap = *image.bitmap();
36  SkAutoLockPixels lock_image(bitmap);
37  return gfx::JPEGCodec::Encode(
38      reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
39      gfx::JPEGCodec::FORMAT_SkBitmap,
40      bitmap.width(),
41      bitmap.height(),
42      bitmap.width() * bitmap.bytesPerPixel(),
43      kDefaultEncodingQuality, output);
44}
45
46}  // namespace
47
48// static
49UserImage UserImage::CreateAndEncode(const gfx::ImageSkia& image) {
50  RawImage raw_image;
51  if (EncodeImageSkia(image, &raw_image)) {
52    UserImage result(image, raw_image);
53    result.MarkAsSafe();
54    return result;
55  }
56  return UserImage(image);
57}
58
59UserImage::UserImage()
60    : has_raw_image_(false),
61      has_animated_image_(false),
62      is_safe_format_(false) {
63}
64
65UserImage::UserImage(const gfx::ImageSkia& image)
66    : image_(image),
67      has_raw_image_(false),
68      has_animated_image_(false),
69      is_safe_format_(false) {
70}
71
72UserImage::UserImage(const gfx::ImageSkia& image,
73                     const RawImage& raw_image)
74    : image_(image),
75      has_raw_image_(false),
76      has_animated_image_(false),
77      is_safe_format_(false) {
78  if (IsAnimatedImage(raw_image)) {
79    has_animated_image_ = true;
80    animated_image_ = raw_image;
81    if (EncodeImageSkia(image_, &raw_image_)) {
82      has_raw_image_ = true;
83      MarkAsSafe();
84    }
85  } else {
86    has_raw_image_ = true;
87    raw_image_ = raw_image;
88  }
89}
90
91UserImage::~UserImage() {}
92
93void UserImage::DiscardRawImage() {
94  RawImage().swap(raw_image_);  // Clear |raw_image_|.
95}
96
97void UserImage::MarkAsSafe() {
98  is_safe_format_ = true;
99}
100
101}  // namespace chromeos
102