chrome/browser/bitmap_fetcher.h - Issue 319623003: [AiS] ImageService

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Issue 319623003: [AiS] ImageService (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Move/rename service. Created 6 years, 6 months ago

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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 #ifndef CHROME_BROWSER_BITMAP_FETCHER_H_

6 #define CHROME_BROWSER_BITMAP_FETCHER_H_

7

8 #include "base/memory/scoped_ptr.h"

9 #include "chrome/browser/bitmap_fetcher_delegate.h"

10 #include "chrome/browser/image_decoder.h"

11 #include "net/url_request/url_fetcher_delegate.h"

12 #include "net/url_request/url_request.h"

13 #include "third_party/skia/include/core/SkBitmap.h"

14 #include "url/gurl.h"

15

16 namespace net {

17 class URLFetcher;

18 class URLRequestContextGetter;

19 } // namespace net

20

21 namespace chrome {

22

23 // Asynchrounously fetches an image from the given URL and returns the

24 // decoded Bitmap to the provided BitmapFetcherDelegate.

25 class BitmapFetcher : public net::URLFetcherDelegate,

26 public ImageDecoder::Delegate {

27 public:

28 BitmapFetcher(const GURL& url, BitmapFetcherDelegate* delegate);

29 virtual ~BitmapFetcher();

30

31 const GURL& url() const { return url_; }

32

33 // Start fetching the URL with the fetcher. The delegate is notified

34 // asynchronously when done. Start may be called more than once in some

35 // cases. If so, subsequent starts will be ignored since the operation is

36 // already in progress. Arguments are used to configure the internal fetcher.

37 // Values for \|load_flags\| are defined in net/base/load_flags.h. In general,

38 // \|net::LOAD_NORMAL\| is appropriate.

39 void Start(net::URLRequestContextGetter* request_context,

40 const std::string& referrer,

41 net::URLRequest::ReferrerPolicy referrer_policy,

42 int load_flags);

43

44 // Methods inherited from URLFetcherDelegate

45

46 // This will be called when the URL has been fetched, successfully or not.

47 // Use accessor methods on \|source\| to get the results.

48 virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;

49

50 // This will be called when some part of the response is read. \|current\|

51 // denotes the number of bytes received up to the call, and \|total\| is the

52 // expected total size of the response (or -1 if not determined).

53 virtual void OnURLFetchDownloadProgress(const net::URLFetcher* source,

54 int64 current,

55 int64 total) OVERRIDE;

56

57 // Methods inherited from ImageDecoder::Delegate

58

59 // Called when image is decoded. \|decoder\| is used to identify the image in

60 // case of decoding several images simultaneously. This will not be called

61 // on the UI thread.

62 virtual void OnImageDecoded(const ImageDecoder* decoder,

63 const SkBitmap& decoded_image) OVERRIDE;

64

65 // Called when decoding image failed.

66 virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE;

67

68 private:

69 // Alerts the delegate that a failure occurred.

70 void ReportFailure();

71

72 scoped_ptr<net::URLFetcher> url_fetcher_;

73 scoped_refptr<ImageDecoder> image_decoder_;

74 const GURL url_;

75 BitmapFetcherDelegate* const delegate_;

76

77 DISALLOW_COPY_AND_ASSIGN(BitmapFetcher);

78 };

79

80 } // namespace chrome

81

82 #endif // CHROME_BROWSER_BITMAP_FETCHER_H_

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