import SwiftUI

extension ShaderLibrary {
  // Important: Cache this instance. Initializing it is expensive.
  static let library: ShaderLibrary = {
    // Make sure to use the right binary based on the target
    #if targetEnvironment(simulator)
      let filename = "Shaders-iphonesimulator"
    #else
      let filename = "Shaders-iphoneos"
    #endif
    
    // Bundle.module is for Swift packages. Use whatever bundle contains your shader files.
    guard let url = Bundle.module.url(forResource: filename, withExtension: "metallib") else {
      fatalError("Missing shader library")
    }
    
    return ShaderLibrary(url: url)
  }()
}