Enable animated gif playback on Mac (#724)

* enable gif for mac

Summary:
I verify that it works for Zeratul as well. 

It also works regardless turbo module is enabled or not.

Test Plan: 
|{F369886201}|{F369889196}|



Reviewers: skyle

Reviewed By: skyle

Subscribers: zackargyle

Differential Revision: https://phabricator.intern.facebook.com/D26272145

Tasks: T82742678

Signature: 26272145:1612513052:520a8b0b3ab4b211c953b3225c6c96ffb8a29fc5

* bypass setImage logic when it is Mac

Summary: as titled

Test Plan:

{F370138978}

{F370139033}


Reviewers: skyle

Reviewed By: skyle

Subscribers: zackargyle

Differential Revision: https://phabricator.intern.facebook.com/D26288169

Signature: 26288169:1612565769:8f779fe01614e3399ac3e484853bb61246210ff4

* address PR comments

* address PR comments 1

Co-authored-by: Mo Wang <mowang@fb.com>

Libraries/Image/RCTAnimatedImage.m

@@ -42,14 +42,14 @@
 
     _imageSource = imageSource;
 
+#if TARGET_OS_OSX // [TODO(macOS ISS#2323203)
+    self = [super initWithData:data];
+#else // ]TODO(macOS ISS#2323203)
     // grab image at the first index
     UIImage *image = [self animatedImageFrameAtIndex:0];
     if (!image) {
       return nil;
     }
-#if TARGET_OS_OSX // [TODO(macOS ISS#2323203)
-    self = [image copy];
-#else // ]TODO(macOS ISS#2323203)
     self = [super initWithCGImage:image.CGImage scale:MAX(scale, 1) orientation:image.imageOrientation];
 
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveMemoryWarning:) name:UIApplicationDidReceiveMemoryWarningNotification object:nil];

Libraries/Image/RCTUIImageViewAnimated.m

@@ -89,10 +89,10 @@ static NSUInteger RCTDeviceFreeMemory() {
     return;
   }
 
-#if !TARGET_OS_OSX // TODO(macOS ISS#2323203)
+#if TARGET_OS_OSX
+  [super setImage:image];
+#else // TODO(macOS ISS#2323203)
   [self stop];
-#endif // TODO(macOS ISS#2323203)
-
   [self resetAnimatedImage];
 
   if ([image respondsToSelector:@selector(animatedImageFrameAtIndex:)]) {
@@ -116,19 +116,18 @@ static NSUInteger RCTDeviceFreeMemory() {
     self.frameBuffer[@(self.currentFrameIndex)] = self.currentFrame;
     dispatch_semaphore_signal(self.lock);
 
-#if !TARGET_OS_OSX // TODO(macOS ISS#2323203)
     // Calculate max buffer size
     [self calculateMaxBufferCount];
 
     if ([self paused]) {
       [self start];
     }
-#endif // TODO(macOS ISS#2323203)
     
     [self.layer setNeedsDisplay];
   } else {
     super.image = image;
   }
+#endif // TODO(macOS ISS#2323203)
 }
 
 #pragma mark - Private

RNTester/js/examples/Image/ImageExample.js

@@ -842,7 +842,7 @@ exports.examples = [
         />
       );
     },
-    platform: 'ios',
+    platform: ['ios', 'macos'], // TODO(OSS Candidate ISS#2710739)
   },
   {
     title: 'Base64 image',