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 // Takes a vector of bitmaps and returns the index of the image that will best 44 // produce an image of size |desired_size| for the given |scale_factors|. 45 static size_t SelectBestFaviconFromBitmaps( 46 const std::vector<SkBitmap>& bitmaps, 47 const std::vector<ui::ScaleFactor>& scale_factors, 48 int desired_size); 49 }; 50 51 #endif // CHROME_BROWSER_FAVICON_FAVICON_UTIL_H_ 52
