How to use Nitro Image in nitro module library?

[kerryaustin]

I'm having trouble using nitro image in another nitro module. I've followed the instructions here and have successfully used NitroImage in android, but on iOS when trying to implement HybridImageSpec, xcode is giving the following error:

Type 'HybridUIImage' cannot conform to protocol 'HybridImageSpec_protocol' because it has requirements that cannot be satisfied

Here is the implementation (this is ripped straight from react-native-vision-camera).

import AVFoundation
import Foundation
import NitroImage
import NitroModules

internal final class HybridUIImage: HybridImageSpec, NativeImage {
  let uiImage: UIImage
  init(uiImage: UIImage) {
    self.uiImage = uiImage
  }
}

Did I miss a step/config? Any help would be much appreciated.

versions being used:

"react-native-nitro-image": "^0.14.0",
"react-native-nitro-modules": "^0.35.6",

[mrousavy]

Is there no second line? What requirements are not satisfied?

[kerryaustin]

Nope no other error details, very strange given this is straight from vision camera and its not throwing an error there.

I was able to work around it by just subclassing NativeImage

internal final class HybridUIImage: NativeImage {
  let uiImage: UIImage
  init(uiImage: UIImage) {
    self.uiImage = uiImage
  }
}

then in my nitro module

public func removeBackgroundFromImage(image: any HybridImageSpec) throws -> Promise<any HybridImageSpec> {
    guard let img = image as? NativeImage else { throw RemoveBackgroundError.withMessage(message: "Cant cast to native image") }
  
    
    return Promise.async {
      let mask = try self.removeBg(inputImage: img.uiImage)
      
      let i = HybridUIImage(uiImage: UIImage(ciImage: mask))
      return i.rotate(degrees: 0.0, allowFastFlagRotation: true) // <---- now returns a HybridImageSpec
    }
  }

Not ideal, but unblocked me for now.