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 RootWindow; 16 } 17 18 namespace ui { 19 class Layer; 20 class LayerDelegate; 21 } 22 23 namespace ash { 24 namespace internal { 25 26 // BootSplashScreen manages a ui::Layer, stacked at the top of the root layer's 27 // children, that displays a copy of the initial contents of the host window. 28 // This allows us to continue displaying the Chrome OS boot splash screen (which 29 // is displayed before Ash starts) after the compositor has taken over so we can 30 // animate the transition between the splash screen and the login screen. 31 class BootSplashScreen { 32 public: 33 explicit BootSplashScreen(aura::RootWindow* root_window); 34 ~BootSplashScreen(); 35 36 // Begins animating |layer_|'s opacity to 0 over |duration|. 37 void StartHideAnimation(base::TimeDelta duration); 38 39 private: 40 class CopyHostContentLayerDelegate; 41 42 // Copies the host window's content to |layer_|. 43 scoped_ptr<CopyHostContentLayerDelegate> layer_delegate_; 44 45 scoped_ptr<ui::Layer> layer_; 46 47 DISALLOW_COPY_AND_ASSIGN(BootSplashScreen); 48 }; 49 50 } // namespace internal 51 } // namespace ash 52 53 #endif // ASH_WM_BOOT_SPLASH_SCREEN_CHROMEOS_H_ 54