Resize and save custom wallpaper to large and small size

chrome/browser/chromeos/login/wallpaper_manager.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_
 
 #include <string>
 
 #include "ash/desktop_background/desktop_background_resources.h"
+#include "base/memory/ref_counted_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/user_image.h"
 #include "chrome/browser/chromeos/login/user_image_loader.h"
 #include "chrome/browser/chromeos/system/timezone_settings.h"
 #include "chrome/browser/ui/webui/options/chromeos/set_wallpaper_options_handler.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 32 matching lines @@
   static void RegisterPrefs(PrefService* local_state);
 
   // Adds PowerManagerClient and TimeZoneSettings observers. It needs to be
   // added after PowerManagerClient initialized.
   void AddObservers();
 
   // Loads wallpaper asynchronously if the current wallpaper is not the
   // wallpaper of logged in user.
   void EnsureLoggedInUserWallpaperLoaded();
 
-  // Fetches |email|'s wallpaper from local disk.
-  void FetchCustomWallpaper(const std::string& email);
+  // Gets |email|'s wallpaper from local disk.
+  void GetCustomWallpaper(const std::string& email);
 
   // Gets encoded custom wallpaper from cache. Returns true if success.
   bool GetCustomWallpaperFromCache(const std::string& email,
                                    gfx::ImageSkia* wallpaper);
 
-  // Returns wallpaper/thumbnail filepath for the given user.
+  // Returns filepath to save original custom wallpaper for the given user.
+  FilePath GetOriginalWallpaperPathForUser(const std::string& username);
+
+  // Returns small resolution custom wallpaper filepath for the given user when
+  // |is_small| is ture. Otherwise, returns large resolution custom wallpaper
+  // path.
   FilePath GetWallpaperPathForUser(const std::string& username,
-                                   bool is_thumbnail);
+                                   bool is_small);
 
   // Gets the thumbnail of custom wallpaper from cache.
   gfx::ImageSkia GetCustomWallpaperThumbnail(const std::string& email);
 
   // Gets wallpaper properties of logged in user.
   void GetLoggedInUserWallpaperProperties(User::WallpaperType* type,
                                           int* index,
                                           base::Time* last_modification_date);
 
   // Gets wallpaper information of logged in user.
@@ skipping 93 matching lines @@
   void FetchWallpaper(const std::string& email,
                       ash::WallpaperLayout layout,
                       const UserImage& wallpaper);
 
   // Generates a 128x80 thumbnail and notifies delegate when ready.
   void GenerateUserWallpaperThumbnail(const std::string& email,
                                       User::WallpaperType type,
                                       base::WeakPtr<WallpaperDelegate> delegate,
                                       const gfx::ImageSkia& wallpaper);
 
+  // Gets |email|'s custom wallpaper in appropriate resolution. Falls back on
+  // original custom wallpaper. Must run on FILE thread.
+  void GetCustomWallpaperInternal(const std::string& email,
+                                  const WallpaperInfo& info);
+
   // Gets wallpaper information of |email| from Local State or memory. Returns
   // false if wallpaper information is not found.
   bool GetUserWallpaperInfo(const std::string& email, WallpaperInfo* info);
 
   // Gets wallpaper |type|, |index| and |last_modification_date| of |email|
   // from local state.
   void GetUserWallpaperProperties(const std::string& email,
                                   User::WallpaperType* type,
                                   int* index,
                                   base::Time* last_modification_date);
 
   // Copy |email| selected built-in wallpapers (high and low resolution) in
   // ChromeOS image binary to local files on disk. Also converts the wallpaper
   // properties correspond to the built-in wallpapers to the new wallpaper info.
   void MigrateBuiltInWallpaper(const std::string& email);
 
   // Updates the custom wallpaper thumbnail in wallpaper picker UI.
   void OnThumbnailUpdated(base::WeakPtr<WallpaperDelegate> delegate);
 
-  // Saves wallpaper to |path| (absolute path) in file system.
-  void SaveWallpaper(const FilePath& path, const UserImage& wallpaper);
+  // Saves encoded wallpaper to |path|. This callback is called after encoding
+  // to PNG completes.
+  void OnWallpaperEncoded(const FilePath& path,
+                          scoped_refptr<base::RefCountedBytes> data);
+
+  // Resizes |wallpaper| to a resolution which is nearest to |preferred_width|
+  // and |preferred_height| while maintaining aspect ratio. And saves the
+  // resized wallpaper to |path|.
+  void ResizeAndSaveCustomWallpaper(const UserImage& wallpaper,
+                                    const FilePath& path,
+                                    ash::WallpaperLayout layout,
+                                    int preferred_width,
+                                    int preferred_height);
+
+  // Saves original custom wallpaper to |path| (absolute path) on filesystem
+  // and starts resizing operation of the custom wallpaper if necessary.
+  void SaveCustomWallpaper(const std::string& email,
+                           const FilePath& path,
+                           ash::WallpaperLayout layout,
+                           const UserImage& wallpaper);
 
   // Saves wallpaper image raw |data| to |path| (absolute path) in file system.
   void SaveWallpaperInternal(const FilePath& path, const char* data, int size);
 
-  // Saves wallpaper to file, post task to generate thumbnail and updates local
-  // state preferences.
-  void SetWallpaper(const std::string& username,
-                    ash::WallpaperLayout layout,
-                    User::WallpaperType type,
-                    base::WeakPtr<WallpaperDelegate> delegate,
-                    const UserImage& wallpaper);
+  // Saves custom wallpaper to file, post task to generate thumbnail and updates
+  // local state preferences.
+  void SetCustomWallpaper(const std::string& username,
+                          ash::WallpaperLayout layout,
+                          User::WallpaperType type,
+                          base::WeakPtr<WallpaperDelegate> delegate,
+                          const UserImage& wallpaper);
 
   // Whether wallpaper data should be persisted for user |email|.
   // Note: this function can not be called in SetUserWallpaperProperties. It
   // will create a deadlock. (issue 142440)
   bool ShouldPersistDataForUser(const std::string& email);
 
   // Sets wallpaper to image in |user_image| with |layout|.
   void OnWallpaperLoaded(ash::WallpaperLayout layout,
                          const UserImage& user_image);
 
@@ skipping 30 matching lines @@
   content::NotificationRegistrar registrar_;
 
   base::OneShotTimer<WallpaperManager> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_