Rewriting to use CIImage in hopes of better performance. Still playing with p...

chrome/browser/cocoa/throbber_view.h

 // Copyright (c) 2009 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_COCOA_THROBBER_VIEW_H_
 #define CHROME_BROWSER_COCOA_THROBBER_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 
 @class TimerTarget;
 
 // A class that knows how to draw an animated state to indicate progress.
 // Currently draws via a sequence of frames in an image, but may ultimately be
 // written to render paths that are rotated around a center origin. Creating
 // the class starts the animation, destroying it stops it. There is no state
 // where the class is frozen on an image and not animating.
 
 @interface ThrobberView : NSView {
  @private
-  scoped_nsobject<NSImage> image_;
+  scoped_nsobject<CIImage> image_;
   scoped_nsobject<TimerTarget> target_;  // Target of animation timer.
   NSTimer* timer_;  // Animation timer. Weak, owned by runloop.
   unsigned int numFrames_;  // Number of frames in this animation.
   unsigned int animationFrame_;  // Current frame of the animation,
                                  // [0..numFrames_)
 }
 
 // Creates the view with |frame| and the image strip desginated by |image|. The
 // image needs to be made of squares such that the height divides evently into
 // the width. Takes ownership of |image|.
 - (id)initWithFrame:(NSRect)frame image:(NSImage*)image;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_THROBBER_VIEW_H_