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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_FAVICON_FAVICON_UTIL_H_
6 #define CHROME_BROWSER_FAVICON_FAVICON_UTIL_H_
7 
8 #include <vector>
9 
10 #include "ui/base/layout.h"
11 
12 namespace chrome {
13 struct FaviconBitmapResult;
14 }
15 
16 namespace gfx {
17 class Image;
18 }
19 
20 // Utility class for common favicon related code.
21 class FaviconUtil {
22  public:
23   // Returns the scale factors at which favicons should be fetched. This is
24   // different from ui::GetSupportedScaleFactors() because clients which do
25   // not support 1x should still fetch a favicon for 1x to push to sync. This
26   // guarantees that the clients receiving sync updates pushed by this client
27   // receive a favicon (potentially of the wrong scale factor) and do not show
28   // the default favicon.
29   static std::vector<ui::ScaleFactor> GetFaviconScaleFactors();
30 
31   // Sets the color space used for converting |image| to an NSImage to the
32   // system colorspace. This makes the favicon look the same in the browser UI
33   // as it does in the renderer.
34   static void SetFaviconColorSpace(gfx::Image* image);
35 
36   // Takes a vector of png-encoded frames, decodes them, and converts them to
37   // a favicon of size favicon_size (in DIPs) at the desired ui scale factors.
38   static gfx::Image SelectFaviconFramesFromPNGs(
39       const std::vector<chrome::FaviconBitmapResult>& png_data,
40       const std::vector<ui::ScaleFactor>& scale_factors,
41       int favicon_size);
42 };
43 
44 #endif  // CHROME_BROWSER_FAVICON_FAVICON_UTIL_H_
45