gfx/favicon_size.h

   1 // Copyright (c) 2006-2008 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 APP_GFX_FAVICON_SIZE_H_
   6 #define APP_GFX_FAVICON_SIZE_H_
   7
   8 #include "base/compiler_specific.h"
   9
  10 // Size (along each axis) of the favicon.
  11 const int kFavIconSize = 16;
  12
  13 // If the width or height is bigger than the favicon size, a new width/height
  14 // is calculated and returned in width/height that maintains the aspect
  15 // ratio of the supplied values.
  16 static void calc_favicon_target_size(int* width, int* height) ALLOW_UNUSED;
  17
  18 // static
  19 void calc_favicon_target_size(int* width, int* height) {
  20   if (*width > kFavIconSize || *height > kFavIconSize) {
  21     // Too big, resize it maintaining the aspect ratio.
  22     float aspect_ratio = static_cast<float>(*width) /
  23                          static_cast<float>(*height);
  24     *height = kFavIconSize;
  25     *width = static_cast<int>(aspect_ratio * *height);
  26     if (*width > kFavIconSize) {
  27       *width = kFavIconSize;
  28       *height = static_cast<int>(*width / aspect_ratio);
  29     }
  30   }
  31 }
  32
  33 #endif  // APP_GFX_FAVICON_SIZE_H_