1 files changed, 33 insertions, 0 deletions
diff --git a/gfx/favicon_size.h b/gfx/favicon_size.h
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--- /dev/null
+++ b/gfx/favicon_size.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef APP_GFX_FAVICON_SIZE_H_
+#define APP_GFX_FAVICON_SIZE_H_
+
+#include "base/compiler_specific.h"
+
+// Size (along each axis) of the favicon.
+const int kFavIconSize = 16;
+
+// If the width or height is bigger than the favicon size, a new width/height
+// is calculated and returned in width/height that maintains the aspect
+// ratio of the supplied values.
+static void calc_favicon_target_size(int* width, int* height) ALLOW_UNUSED;
+
+// static
+void calc_favicon_target_size(int* width, int* height) {
+  if (*width > kFavIconSize || *height > kFavIconSize) {
+    // Too big, resize it maintaining the aspect ratio.
+    float aspect_ratio = static_cast<float>(*width) /
+                         static_cast<float>(*height);
+    *height = kFavIconSize;
+    *width = static_cast<int>(aspect_ratio * *height);
+    if (*width > kFavIconSize) {
+      *width = kFavIconSize;
+      *height = static_cast<int>(*width / aspect_ratio);
+    }
+  }
+}
+
+#endif  // APP_GFX_FAVICON_SIZE_H_