uiimage to metal in swift

main.swift
import MetalKit

func uiImageToMetalTexture(image: UIImage, device: MTLDevice) -> MTLTexture? {
    guard let cgImage = image.cgImage else {
        return nil
    }
    
    // Create a texture descriptor that describes the texture we want to create
    let textureDescriptor = MTLTextureDescriptor.texture2DDescriptor(
        pixelFormat: .rgba8Unorm,
        width: cgImage.width,
        height: cgImage.height,
        mipmapped: false)
    
    // Create a Metal texture from the texture descriptor
    guard let texture = device.makeTexture(descriptor: textureDescriptor) else {
        return nil
    }
    
    // Copy the pixel data into the Metal texture using Core Graphics
    let bytesPerRow = cgImage.width * 4
    let region = MTLRegionMake2D(0, 0, cgImage.width, cgImage.height)
    guard let context = CGContext(
        data: texture.buffer?.contents(),
        width: cgImage.width,
        height: cgImage.height,
        bitsPerComponent: 8,
        bytesPerRow: bytesPerRow,
        space: CGColorSpaceCreateDeviceRGB(),
        bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue)
    else {
        return nil
    }
    
    context.draw(cgImage, in: CGRect(x: 0, y: 0, width: cgImage.width, height: cgImage.height))
    
    return texture
}
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