118 lines
3.4 KiB
Swift
118 lines
3.4 KiB
Swift
import AlberDriver
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import SwiftUI
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import MetalKit
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import Darwin
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final class DrawableSize {
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var width: UInt32 = 0
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var height: UInt32 = 0
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var sizeChanged = false
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}
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var emulatorLock = NSLock()
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var drawableSize = DrawableSize()
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class ResizeAwareMTKView: MTKView {
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var onResize: ((CGSize) -> Void)?
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override func layoutSubviews() {
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super.layoutSubviews()
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onResize?(self.drawableSize)
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}
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}
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class DocumentViewController: UIViewController, DocumentDelegate {
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var documentPicker: DocumentPicker!
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override func viewDidLoad() {
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super.viewDidLoad()
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documentPicker = DocumentPicker(presentationController: self, delegate: self)
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/// When the view loads (ie user opens the app) show the file picker
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show()
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}
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/// Callback from the document picker
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func didPickDocument(document: Document?) {
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if let pickedDoc = document {
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let fileURL = pickedDoc.fileURL
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print("Loading ROM", fileURL)
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emulatorLock.lock()
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print(fileURL.path(percentEncoded: false))
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iosLoadROM(fileURL.path(percentEncoded: false))
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emulatorLock.unlock()
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}
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}
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func show() {
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documentPicker.displayPicker()
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}
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}
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struct DocumentView: UIViewControllerRepresentable {
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func makeUIViewController(context: Context) -> DocumentViewController {
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DocumentViewController()
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}
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func updateUIViewController(_ uiViewController: DocumentViewController, context: Context) {}
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}
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struct ContentView: UIViewRepresentable {
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func makeUIView(context: Context) -> ResizeAwareMTKView {
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let mtkView = ResizeAwareMTKView()
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mtkView.preferredFramesPerSecond = 60
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mtkView.enableSetNeedsDisplay = true
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mtkView.isPaused = true
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if let metalDevice = MTLCreateSystemDefaultDevice() {
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mtkView.device = metalDevice
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}
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mtkView.framebufferOnly = false
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mtkView.drawableSize = mtkView.frame.size
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mtkView.onResize = { newDrawableSize in
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let newWidth = UInt32(newDrawableSize.width)
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let newHeight = UInt32(newDrawableSize.height)
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emulatorLock.lock()
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if drawableSize.width != newWidth || drawableSize.height != newHeight {
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drawableSize.width = newWidth
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drawableSize.height = newHeight
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drawableSize.sizeChanged = true
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}
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emulatorLock.unlock()
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}
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let dispatchQueue = DispatchQueue(label: "QueueIdentification", qos: .background)
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let metalLayer = mtkView.layer as! CAMetalLayer
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dispatchQueue.async {
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iosCreateEmulator()
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while (true) {
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emulatorLock.lock()
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if drawableSize.sizeChanged {
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drawableSize.sizeChanged = false
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iosSetOutputSize(drawableSize.width, drawableSize.height)
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}
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iosRunFrame(metalLayer)
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emulatorLock.unlock()
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}
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}
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return mtkView
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}
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func updateUIView(_ uiView: ResizeAwareMTKView, context: Context) {}
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}
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struct ContentView_Previews: PreviewProvider {
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static var previews: some View {
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DocumentView()
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ContentView()
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.frame(maxWidth: .infinity, maxHeight: .infinity)
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}
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}
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