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      1 // Copyright (c) 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 #include "chrome/browser/ui/ash/solid_color_user_wallpaper_delegate.h"
      6 
      7 #include "ash/desktop_background/desktop_background_controller.h"
      8 #include "ash/desktop_background/user_wallpaper_delegate.h"
      9 #include "ash/shell.h"
     10 #include "ash/wm/window_animations.h"
     11 #include "base/basictypes.h"
     12 #include "ui/gfx/image/image_skia.h"
     13 
     14 namespace {
     15 
     16 const char kBackgroundRed   = 70;
     17 const char kBackgroundGreen = 70;
     18 const char kBackgroundBlue  = 78;
     19 
     20 class UserWallpaperDelegate : public ash::UserWallpaperDelegate {
     21  public:
     22   UserWallpaperDelegate() {
     23   }
     24 
     25   virtual ~UserWallpaperDelegate() {
     26   }
     27 
     28   virtual int GetAnimationType() OVERRIDE {
     29     return ShouldShowInitialAnimation() ?
     30         ash::WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE :
     31         static_cast<int>(wm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
     32   }
     33 
     34   virtual bool ShouldShowInitialAnimation() OVERRIDE {
     35     return true;
     36   }
     37 
     38   virtual int GetAnimationDurationOverride() OVERRIDE {
     39     // Return 0 to select the default.
     40     return 0;
     41   }
     42 
     43   virtual void SetAnimationDurationOverride(
     44       int animation_duration_in_ms) OVERRIDE {
     45     NOTIMPLEMENTED();
     46   }
     47 
     48   virtual void UpdateWallpaper(bool clear_cache) OVERRIDE {
     49     SkBitmap bitmap;
     50     bitmap.allocN32Pixels(16, 16);
     51     bitmap.eraseARGB(255, kBackgroundRed, kBackgroundGreen, kBackgroundBlue);
     52 #if !defined(NDEBUG)
     53     // In debug builds we generate a simple pattern that allows visually
     54     // notice if transparency is broken.
     55     {
     56       SkAutoLockPixels alp(bitmap);
     57       *bitmap.getAddr32(0,0) = SkColorSetRGB(0, 0, 0);
     58     }
     59 #endif
     60     gfx::ImageSkia wallpaper = gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
     61     ash::Shell::GetInstance()
     62         ->desktop_background_controller()
     63         ->SetWallpaperImage(wallpaper, ash::WALLPAPER_LAYOUT_TILE);
     64   }
     65 
     66   virtual void InitializeWallpaper() OVERRIDE {
     67     UpdateWallpaper(false);
     68   }
     69 
     70   virtual void OpenSetWallpaperPage() OVERRIDE {
     71   }
     72 
     73   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
     74     return false;
     75   }
     76 
     77   virtual void OnWallpaperAnimationFinished() OVERRIDE {
     78   }
     79 
     80   virtual void OnWallpaperBootAnimationFinished() OVERRIDE {
     81   }
     82 
     83  private:
     84   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
     85 };
     86 
     87 }  // namespace
     88 
     89 ash::UserWallpaperDelegate* CreateSolidColorUserWallpaperDelegate() {
     90   return new UserWallpaperDelegate();
     91 }
     92