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 "content/renderer/fetchers/multi_resolution_image_resource_fetcher.h"
6
7#include "base/bind.h"
8#include "base/bind_helpers.h"
9#include "content/child/image_decoder.h"
10#include "content/public/renderer/resource_fetcher.h"
11#include "third_party/WebKit/public/platform/WebURLResponse.h"
12#include "third_party/WebKit/public/web/WebFrame.h"
13#include "third_party/skia/include/core/SkBitmap.h"
14#include "ui/gfx/size.h"
15
16using blink::WebFrame;
17using blink::WebURLRequest;
18using blink::WebURLResponse;
19
20namespace content {
21
22MultiResolutionImageResourceFetcher::MultiResolutionImageResourceFetcher(
23    const GURL& image_url,
24    WebFrame* frame,
25    int id,
26    WebURLRequest::TargetType target_type,
27    const Callback& callback)
28    : callback_(callback),
29      id_(id),
30      http_status_code_(0),
31      image_url_(image_url) {
32  fetcher_.reset(ResourceFetcher::Create(image_url));
33  fetcher_->Start(
34      frame, target_type,
35      base::Bind(&MultiResolutionImageResourceFetcher::OnURLFetchComplete,
36                 base::Unretained(this)));
37}
38
39MultiResolutionImageResourceFetcher::~MultiResolutionImageResourceFetcher() {
40}
41
42void MultiResolutionImageResourceFetcher::OnURLFetchComplete(
43    const WebURLResponse& response,
44    const std::string& data) {
45  std::vector<SkBitmap> bitmaps;
46  if (!response.isNull()) {
47    http_status_code_ = response.httpStatusCode();
48    GURL url(response.url());
49    if (http_status_code_ == 200 || url.SchemeIsFile()) {
50      // Request succeeded, try to convert it to an image.
51      bitmaps = ImageDecoder::DecodeAll(
52          reinterpret_cast<const unsigned char*>(data.data()), data.size());
53    }
54  } // else case:
55    // If we get here, it means no image from server or couldn't decode the
56    // response as an image. The delegate will see an empty vector.
57
58  // Take a reference to the callback as running the callback may lead to our
59  // destruction.
60  Callback callback = callback_;
61  callback.Run(this, bitmaps);
62}
63
64}  // namespace content
65