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
13 using content::BrowserThread;
14 using content::UtilityProcessHost;
15
ImageDecoder(Delegate * delegate,const std::string & image_data,ImageCodec image_codec)16 ImageDecoder::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
~ImageDecoder()25 ImageDecoder::~ImageDecoder() {}
26
Start(scoped_refptr<base::SequencedTaskRunner> task_runner)27 void 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
OnMessageReceived(const IPC::Message & message)34 bool 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
OnDecodeImageSucceeded(const SkBitmap & decoded_image)46 void ImageDecoder::OnDecodeImageSucceeded(const SkBitmap& decoded_image) {
47 DCHECK(task_runner_->RunsTasksOnCurrentThread());
48 if (delegate_)
49 delegate_->OnImageDecoded(this, decoded_image);
50 }
51
OnDecodeImageFailed()52 void ImageDecoder::OnDecodeImageFailed() {
53 DCHECK(task_runner_->RunsTasksOnCurrentThread());
54 if (delegate_)
55 delegate_->OnDecodeImageFailed(this);
56 }
57
DecodeImageInSandbox(const std::vector<unsigned char> & image_data)58 void 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