Ported TabBarIOS to OSS and unified implementation

Libraries/Image/RCTStaticImage.m

@@ -0,0 +1,55 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#import "RCTStaticImage.h"
+
+@implementation RCTStaticImage
+
+- (void)_updateImage
+{
+  UIImage *image = self.image;
+  if (!image) {
+    return;
+  }
+  
+  // Apply rendering mode
+  if (_renderingMode != image.renderingMode) {
+    image = [image imageWithRenderingMode:_renderingMode];
+  }
+  
+  // Applying capInsets of 0 will switch the "resizingMode" of the image to "tile" which is undesired
+  if (!UIEdgeInsetsEqualToEdgeInsets(UIEdgeInsetsZero, _capInsets)) {
+    image = [image resizableImageWithCapInsets:_capInsets resizingMode:UIImageResizingModeStretch];
+  }
+
+  // Apply trilinear filtering to smooth out mis-sized images
+  self.layer.minificationFilter = kCAFilterTrilinear;
+  self.layer.magnificationFilter = kCAFilterTrilinear;
+  
+  super.image = image;
+}
+
+- (void)setImage:(UIImage *)image
+{
+  if (image != super.image) {
+    super.image = image;
+    [self _updateImage];
+  }
+}
+
+- (void)setCapInsets:(UIEdgeInsets)capInsets
+{
+  if (!UIEdgeInsetsEqualToEdgeInsets(_capInsets, capInsets)) {
+    _capInsets = capInsets;
+    [self _updateImage];
+  }
+}
+
+- (void)setRenderingMode:(UIImageRenderingMode)renderingMode
+{
+  if (_renderingMode != renderingMode) {
+    _renderingMode = renderingMode;
+    [self _updateImage];
+  }
+}
+
+@end