@DoNotStrip
  public static void toCircleFast(Bitmap bitmap, boolean antiAliased) {
    Preconditions.checkNotNull(bitmap);
    if (bitmap.getWidth() < 3 || bitmap.getHeight() < 3) {
      return; // Image too small to round
    }
    nativeToCircleFastFilter(bitmap, antiAliased);
  }
This is a fast, native implementation for rounding a bitmap. It takes the given bitmap and
modifies it to be circular.

<p>This implementation does not change the underlying bitmap dimensions, it only sets pixels
that are outside of the circle to a transparent color.

@param bitmap the bitmap to modify
native-filters/src/main/java/com/facebook/imagepipeline/nativecode/NativeRoundingFilter.java