chrome/browser/ui/ash/user_wallpaper_delegate_win.cc

   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 "ash/desktop_background/user_wallpaper_delegate.h"
   6
   7 #include "ash/desktop_background/desktop_background_controller.h"
   8 #include "ash/shell.h"
   9 #include "ash/wm/window_animations.h"
  10 #include "base/basictypes.h"
  11 #include "ui/gfx/image/image_skia.h"
  12
  13 namespace {
  14
  15 const char kBackgroundRed   = 70;
  16 const char kBackgroundGreen = 70;
  17 const char kBackgroundBlue  = 78;
  18
  19 class UserWallpaperDelegate : public ash::UserWallpaperDelegate {
  20  public:
  21   UserWallpaperDelegate() {
  22   }
  23
  24   virtual ~UserWallpaperDelegate() {
  25   }
  26
  27   virtual int GetAnimationType() OVERRIDE {
  28     return ShouldShowInitialAnimation() ?
  29         ash::WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE :
  30         static_cast<int>(views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
  31   }
  32
  33   virtual bool ShouldShowInitialAnimation() OVERRIDE {
  34     return true;
  35   }
  36
  37   virtual void UpdateWallpaper() OVERRIDE {
  38     SkBitmap bitmap;
  39     bitmap.setConfig(SkBitmap::kARGB_8888_Config, 16, 16);
  40     bitmap.allocPixels();
  41     bitmap.eraseARGB(255, kBackgroundRed, kBackgroundGreen, kBackgroundBlue);
  42 #if !defined(NDEBUG)
  43     // In debug builds we generate a simple pattern that allows visually
  44     // notice if transparency is broken.
  45     {
  46       SkAutoLockPixels alp(bitmap);
  47       *bitmap.getAddr32(0,0) = SkColorSetRGB(0, 0, 0);
  48     }
  49 #endif
  50     gfx::ImageSkia wallpaper = gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
  51     ash::Shell::GetInstance()->desktop_background_controller()->
  52         SetCustomWallpaper(wallpaper, ash::WALLPAPER_LAYOUT_TILE);
  53   }
  54
  55   virtual void InitializeWallpaper() OVERRIDE {
  56     UpdateWallpaper();
  57   }
  58
  59   virtual void OpenSetWallpaperPage() OVERRIDE {
  60   }
  61
  62   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
  63     return false;
  64   }
  65
  66   virtual void OnWallpaperAnimationFinished() OVERRIDE {
  67   }
  68
  69   virtual void OnWallpaperBootAnimationFinished() OVERRIDE {
  70   }
  71
  72  private:
  73   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
  74 };
  75
  76 }  // namespace
  77
  78 ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() {
  79   return new UserWallpaperDelegate();
  80 }