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