components/user_manager/user_image/user_image.cc

   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 "components/user_manager/user_image/user_image.h"
   6
   7 #include "base/trace_event/trace_event.h"
   8 #include "third_party/skia/include/core/SkBitmap.h"
   9 #include "ui/gfx/codec/jpeg_codec.h"
  10
  11 namespace user_manager {
  12
  13 namespace {
  14
  15 // Default quality for encoding user images.
  16 const int kDefaultEncodingQuality = 90;
  17
  18 bool EncodeImageSkia(const gfx::ImageSkia& image,
  19                      std::vector<unsigned char>* output) {
  20   TRACE_EVENT2("oobe", "EncodeImageSkia",
  21                "width", image.width(), "height", image.height());
  22   if (image.isNull())
  23     return false;
  24   const SkBitmap& bitmap = *image.bitmap();
  25   SkAutoLockPixels lock_image(bitmap);
  26   return gfx::JPEGCodec::Encode(
  27       reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
  28       gfx::JPEGCodec::FORMAT_SkBitmap,
  29       bitmap.width(),
  30       bitmap.height(),
  31       bitmap.width() * bitmap.bytesPerPixel(),
  32       kDefaultEncodingQuality, output);
  33 }
  34
  35 }  // namespace
  36
  37 // static
  38 UserImage UserImage::CreateAndEncode(const gfx::ImageSkia& image) {
  39   RawImage raw_image;
  40   if (EncodeImageSkia(image, &raw_image)) {
  41     UserImage result(image, raw_image);
  42     result.MarkAsSafe();
  43     return result;
  44   }
  45   return UserImage(image);
  46 }
  47
  48 UserImage::UserImage()
  49     : has_raw_image_(false),
  50       is_safe_format_(false) {
  51 }
  52
  53 UserImage::UserImage(const gfx::ImageSkia& image)
  54     : image_(image),
  55       has_raw_image_(false),
  56       is_safe_format_(false) {
  57 }
  58
  59 UserImage::UserImage(const gfx::ImageSkia& image,
  60                      const RawImage& raw_image)
  61     : image_(image),
  62       has_raw_image_(false),
  63       is_safe_format_(false) {
  64   has_raw_image_ = true;
  65   raw_image_ = raw_image;
  66 }
  67
  68 UserImage::~UserImage() {}
  69
  70 void UserImage::DiscardRawImage() {
  71   RawImage().swap(raw_image_);  // Clear |raw_image_|.
  72 }
  73
  74 void UserImage::MarkAsSafe() {
  75   is_safe_format_ = true;
  76 }
  77
  78 }  // namespace user_manager