chrome/browser/favicon/favicon_util.h

   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_