1 // Copyright 2013 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 ASH_WM_BOOT_SPLASH_SCREEN_CHROMEOS_H_ 6 #define ASH_WM_BOOT_SPLASH_SCREEN_CHROMEOS_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/time/time.h" 13 14 namespace aura { 15 class WindowTreeHost; 16 } 17 18 namespace ui { 19 class Layer; 20 class LayerDelegate; 21 } 22 23 namespace ash { 24 25 // BootSplashScreen manages a ui::Layer, stacked at the top of the root layer's 26 // children, that displays a copy of the initial contents of the host window. 27 // This allows us to continue displaying the Chrome OS boot splash screen (which 28 // is displayed before Ash starts) after the compositor has taken over so we can 29 // animate the transition between the splash screen and the login screen. 30 class BootSplashScreen { 31 public: 32 explicit BootSplashScreen(aura::WindowTreeHost* host); 33 ~BootSplashScreen(); 34 35 // Begins animating |layer_|'s opacity to 0 over |duration|. 36 void StartHideAnimation(base::TimeDelta duration); 37 38 private: 39 class CopyHostContentLayerDelegate; 40 41 // Copies the host window's content to |layer_|. 42 scoped_ptr<CopyHostContentLayerDelegate> layer_delegate_; 43 44 scoped_ptr<ui::Layer> layer_; 45 46 DISALLOW_COPY_AND_ASSIGN(BootSplashScreen); 47 }; 48 49 } // namespace ash 50 51 #endif // ASH_WM_BOOT_SPLASH_SCREEN_CHROMEOS_H_ 52