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
12namespace chrome {
13struct FaviconBitmapResult;
14}
15
16namespace gfx {
17class Image;
18}
19
20// Utility class for common favicon related code.
21class 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