convert a uiimage to bitmap in swift

To convert a UIImage to a bitmap in Swift, you can follow these steps:

Get the image's CGImage property.
Get the image's size in points.
Create a new bitmap context with the same dimensions as the image.
Draw the image into the bitmap context.
Get the bitmap data from the context.
Create a new bitmap with the data.

Here's the Swift code:


main.swift
func convertImageToBitmap(image: UIImage) -> Bitmap? {
    guard let cgImage = image.cgImage else { return nil }
    let size = image.size

    let bitmapContext = CGContext(
        data: nil,
        width: Int(size.width),
        height: Int(size.height),
        bitsPerComponent: cgImage.bitsPerComponent,
        bytesPerRow: cgImage.bytesPerRow,
        space: cgImage.colorSpace!,
        bitmapInfo: cgImage.bitmapInfo.rawValue
    )!

    bitmapContext.draw(cgImage, in: CGRect(origin: .zero, size: size))

    guard let data = bitmapContext.data else { return nil }
    return Bitmap(
        data: Data(bytes: data, count: Int(size.width * size.height * 4)),
        width: Int(size.width),
        height: Int(size.height)
    )
}

struct Bitmap {
    let data: Data
    let width: Int
    let height: Int
}
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This code returns a Bitmap struct that contains the bitmap data as Data, and the width and height of the bitmap. You can use this data to create a new image, or use it for other purposes.

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