1// Copyright (c) 2012 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/image_decoder.h"
6
7#include "base/bind.h"
8#include "chrome/browser/browser_process.h"
9#include "chrome/common/chrome_utility_messages.h"
10#include "content/public/browser/browser_thread.h"
11#include "content/public/browser/utility_process_host.h"
12
13using content::BrowserThread;
14using content::UtilityProcessHost;
15
16ImageDecoder::ImageDecoder(Delegate* delegate,
17                           const std::string& image_data,
18                           ImageCodec image_codec)
19    : delegate_(delegate),
20      image_data_(image_data.begin(), image_data.end()),
21      image_codec_(image_codec),
22      task_runner_(NULL) {
23}
24
25ImageDecoder::~ImageDecoder() {}
26
27void ImageDecoder::Start(scoped_refptr<base::SequencedTaskRunner> task_runner) {
28  task_runner_ = task_runner;
29  BrowserThread::PostTask(
30     BrowserThread::IO, FROM_HERE,
31     base::Bind(&ImageDecoder::DecodeImageInSandbox, this, image_data_));
32}
33
34bool ImageDecoder::OnMessageReceived(const IPC::Message& message) {
35  bool handled = true;
36  IPC_BEGIN_MESSAGE_MAP(ImageDecoder, message)
37    IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_DecodeImage_Succeeded,
38                        OnDecodeImageSucceeded)
39    IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_DecodeImage_Failed,
40                        OnDecodeImageFailed)
41    IPC_MESSAGE_UNHANDLED(handled = false)
42  IPC_END_MESSAGE_MAP()
43  return handled;
44}
45
46void ImageDecoder::OnDecodeImageSucceeded(const SkBitmap& decoded_image) {
47  DCHECK(task_runner_->RunsTasksOnCurrentThread());
48  if (delegate_)
49    delegate_->OnImageDecoded(this, decoded_image);
50}
51
52void ImageDecoder::OnDecodeImageFailed() {
53  DCHECK(task_runner_->RunsTasksOnCurrentThread());
54  if (delegate_)
55    delegate_->OnDecodeImageFailed(this);
56}
57
58void ImageDecoder::DecodeImageInSandbox(
59    const std::vector<unsigned char>& image_data) {
60  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
61  UtilityProcessHost* utility_process_host;
62  utility_process_host = UtilityProcessHost::Create(this, task_runner_.get());
63  if (image_codec_ == ROBUST_JPEG_CODEC) {
64    utility_process_host->Send(
65        new ChromeUtilityMsg_RobustJPEGDecodeImage(image_data));
66  } else {
67    utility_process_host->Send(new ChromeUtilityMsg_DecodeImage(image_data));
68  }
69}
70