[Mac] Give info bubble windows a gaussian blur and a smaller border radius.

chrome/browser/ui/cocoa/info_bubble_window.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/mac/foundation_util.h"
 #include "base/memory/scoped_nsobject.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
 
 namespace {
 const CGFloat kOrderInSlideOffset = 10;
 const NSTimeInterval kOrderInAnimationDuration = 0.075;
 const NSTimeInterval kOrderOutAnimationDuration = 0.15;
 // The minimum representable time interval.  This can be used as the value
 // passed to +[NSAnimationContext setDuration:] to stop an in-progress
 // animation as quickly as possible.
 const NSTimeInterval kMinimumTimeInterval =
     std::numeric_limits<NSTimeInterval>::min();
-}
+}  // namespace
 
-@interface InfoBubbleWindow(Private)
+// Forward declare private window server functions used to style the window.
+extern "C" {
+typedef int CGSConnection;
+typedef int CGSWindow;
+typedef void* CGSWindowFilterRef;
+
+CGSConnection _CGSDefaultConnection();
+CGError CGSNewCIFilterByName(CGSConnection cid,
+                             CFStringRef filterName,
+                             CGSWindowFilterRef *outFilter);
+CGError CGSAddWindowFilter(CGSConnection cid,
+                           CGSWindow wid,
+                           CGSWindowFilterRef filter,
+                           int flags);
+CGError CGSReleaseCIFilter(CGSConnection cid, CGSWindowFilterRef filter);
+CGError CGSSetCIFilterValuesFromDictionary(
+    CGSConnection cid, CGSWindowFilterRef filter, CFDictionaryRef filterValues);
+}  // extern "C"
+
+@interface InfoBubbleWindow (Private)
 - (void)appIsTerminating;
 - (void)finishCloseAfterAnimation;
 @end
 
 // A helper class to proxy app notifications to the window.
 class AppNotificationBridge : public content::NotificationObserver {
  public:
   explicit AppNotificationBridge(InfoBubbleWindow* owner) : owner_(owner) {
     registrar_.Add(this, content::NOTIFICATION_APP_TERMINATING,
                    content::NotificationService::AllSources());
@@ skipping 157 matching lines @@
     // Order self appropriately assuming that its alpha is zero as set up
     // in the designated initializer.
     [super orderWindow:orderingMode relativeTo:otherWindowNumber];
 
     // Set up frame so it can be adjust down by a few pixels.
     NSRect frame = [self frame];
     NSPoint newOrigin = frame.origin;
     newOrigin.y += kOrderInSlideOffset;
     [self setFrameOrigin:newOrigin];
 
+    // Add a gaussian blur to the window.
+    CGSConnection cgsConnection = _CGSDefaultConnection();
+    CGSWindowFilterRef filter;
+    if (CGSNewCIFilterByName(cgsConnection, CFSTR("CIGaussianBlur"),
+                             &filter) == kCGErrorSuccess) {
+      NSDictionary* blurOptions =
+          [NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:1.5]
+                                      forKey:@"inputRadius"];
+
+      if (CGSSetCIFilterValuesFromDictionary(cgsConnection, filter,
+              base::mac::NSToCFCast(blurOptions)) == kCGErrorSuccess) {
+        CGSAddWindowFilter(cgsConnection, [self windowNumber], filter, 1);
+      }
+
+      CGSReleaseCIFilter(cgsConnection, filter);
+    }
+
     // Apply animations to show and move self.
     [NSAnimationContext beginGrouping];
     // The star currently triggers on mouse down, not mouse up.
     [[NSAnimationContext currentContext]
         gtm_setDuration:kOrderInAnimationDuration
               eventMask:NSLeftMouseUpMask|NSLeftMouseDownMask];
     [[self animator] setAlphaValue:1.0];
     [[self animator] setFrame:frame display:YES];
     [NSAnimationContext endGrouping];
   } else {
     [super orderWindow:orderingMode relativeTo:otherWindowNumber];
   }
 }
 
 // If the window is currently animating a close, block all UI events to the
 // window.
 - (void)sendEvent:(NSEvent*)theEvent {
   if (!closing_)
     [super sendEvent:theEvent];
 }
 
 - (BOOL)isClosing {
   return closing_;
 }
 
 @end