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Side by Side Diff: chrome/browser/extensions/extension_icon_image.h

Issue 10825012: chromeos: Fix pixelated icons in app list and launcher (part 2) (by xiyuan) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase Created 8 years, 4 months ago
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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 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_
6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_
7
8 #include <map>
9 #include <string>
10
11 #include "base/basictypes.h"
12 #include "chrome/browser/extensions/image_loading_tracker.h"
13 #include "chrome/common/extensions/extension_icon_set.h"
14 #include "content/public/browser/notification_observer.h"
15 #include "content/public/browser/notification_registrar.h"
16 #include "ui/gfx/image/image_skia.h"
17
18 namespace extensions {
19 class Extension;
20 }
21
22 namespace gfx {
23 class Size;
24 }
25
26 namespace extensions {
27
28 // A class that provides an ImageSkia for UI code to use. It handles extension
29 // icon resource loading, screen scale factor change etc. UI code that uses
30 // extension icon should host this class and be its delegate. ExtensionIconImage
31 // should be outlived by the delegate. In painting code, UI code paints with the
32 // ImageSkia provided by this class. If required extension icon resource is not
33 // present, this class uses ImageLoadingTracker to load it and call on its
34 // delegate interface when the resource is loaded.
35 class IconImage : public ImageLoadingTracker::Observer,
36 public content::NotificationObserver {
37 public:
38 class Delegate {
39 public:
40 // Invoked when |image| is updated with image reps for additional scale
41 // factors.
42 virtual void OnExtensionIconImageChanged(IconImage* image) = 0;
43
44 protected:
45 virtual ~Delegate() {}
46 };
47
48 IconImage(const Extension* extension,
49 const ExtensionIconSet& icon_set,
50 int resource_size_in_dip,
51 ExtensionIconSet::MatchType resource_match_type,
52 const gfx::Size& desired_size_in_dip,
53 ImageLoadingTracker::CacheParam cache_param,
54 Delegate* delegate);
55 virtual ~IconImage();
56
57 const gfx::ImageSkia& image_skia() const { return image_skia_; }
pkotwicz 2012/08/03 17:58:38 I am a bit concerned of what will happen if this f
tbarzic 2012/08/03 18:44:28 afaik, this always gets called before OnImageLoade
58
59 private:
60 class Source;
61 typedef std::map<int, ui::ScaleFactor> LoadMap;
62
63 // Loads bitmap for additional scale factor.
64 void LoadImageForScaleFactor(ui::ScaleFactor scale_factor);
65
66 // ImageLoadingTracker::Observer overrides:
67 virtual void OnImageLoaded(const gfx::Image& image,
68 const std::string& extension_id,
69 int index) OVERRIDE;
70
71 // content::NotificationObserver overrides:
72 virtual void Observe(int type,
73 const content::NotificationSource& source,
74 const content::NotificationDetails& details) OVERRIDE;
75
76 const Extension* extension_;
77 const ExtensionIconSet& icon_set_;
78 const int resource_size_in_dip_;
79 const ExtensionIconSet::MatchType resource_match_type_;
80 const gfx::Size desired_size_in_dip_;
81 const ImageLoadingTracker::CacheParam cache_param_;
82
83 Delegate* delegate_;
84
85 Source* source_; // Owned by ImageSkia storage.
86 gfx::ImageSkia image_skia_;
87
88 ImageLoadingTracker tracker_;
89 content::NotificationRegistrar registrar_;
90
91 LoadMap load_map_;
92
93 DISALLOW_COPY_AND_ASSIGN(IconImage);
94 };
95
96 } // namespace extensions
97
98 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_ICON_IMAGE_H_
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