This is a framework that supports the appicon-generator tool. It can also be used independently. Using Swift Package Manager, your package definition may look a little something like this:

let package = Package(
    name: "my-tool",
    dependencies: [
        .package(url: "", from: "1.0.0")
    targets: [
            name: "my-tool",
            dependencies: ["AppIconGeneratorCore"])

Then you can import the framework in your code.

import AppIconKit

You use EmojiIconRenderer to render a single emoji icon as a PNG.

let iconRenderer = EmojiIconRenderer(text: "😺", backgroundColor: .white)
let data = try iconRenderer.renderPNG(sizeInPixels: 50)

You can also use it in combination with AppIconSetGenerator to generate a full set of icons.

let generator = AppIconSetGenerator(iconRenderer: iconRenderer)
let currentDirectory = URL(fileURLWithPath: "")
try generator.createAppIconSet(in: currentDirectory)

You can also pass in your own icon renderer by conforming to the IconRenderer protocol.