1 files changed, 58 insertions, 7 deletions
diff --git a/metal_view.swift b/metal_view.swift
index 7cc8d34..31c2ea8 100644
--- a/metal_view.swift
+++ b/metal_view.swift
@@ -1,8 +1,59 @@
-//
-//  metal_view.swift
-//  metal_test
-//
-//  Created by Ian C on 02/12/2023.
-//
+import SwiftUI
+import MetalKit
 
-import Foundation
+struct MetalView: NSViewRepresentable {
+    func makeCoordinator() -> Coordinator {
+        Coordinator(self)
+    }
+    func makeNSView(context: NSViewRepresentableContext<MetalView>) -> MTKView {
+        let mtkView = MTKView()
+        mtkView.delegate = context.coordinator
+        mtkView.preferredFramesPerSecond = 60
+        mtkView.enableSetNeedsDisplay = true
+        if let metalDevice = MTLCreateSystemDefaultDevice() {
+            mtkView.device = metalDevice
+        }
+        mtkView.framebufferOnly = false
+        mtkView.clearColor = MTLClearColor(red: 0, green: 0, blue: 0, alpha: 0)
+        mtkView.drawableSize = mtkView.frame.size
+        mtkView.enableSetNeedsDisplay = true
+        mtkView.isPaused = false
+        return mtkView
+    }
+    
+    func updateNSView(_ nsView: MTKView, context: NSViewRepresentableContext<MetalView>) {
+    }
+    
+    class Coordinator : NSObject, MTKViewDelegate {
+        var parent: MetalView
+        var metalDevice: MTLDevice!
+        var metalCommandQueue: MTLCommandQueue!
+        
+        init(_ parent: MetalView) {
+            self.parent = parent
+            if let metalDevice = MTLCreateSystemDefaultDevice() {
+                self.metalDevice = metalDevice
+            }
+            self.metalCommandQueue = metalDevice.makeCommandQueue()!
+            super.init()
+        }
+        
+        func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
+        }
+        
+        func draw(in view: MTKView) {
+            guard let drawable = view.currentDrawable else {
+                return
+            }
+            let commandBuffer = metalCommandQueue.makeCommandBuffer()
+            let rpd = view.currentRenderPassDescriptor
+            rpd?.colorAttachments[0].clearColor = MTLClearColorMake(0, 0, 0, 1)
+            rpd?.colorAttachments[0].loadAction = .clear
+            rpd?.colorAttachments[0].storeAction = .store
+            let re = commandBuffer?.makeRenderCommandEncoder(descriptor: rpd!)
+            re?.endEncoding()
+            commandBuffer?.present(drawable)
+            commandBuffer?.commit()
+        }
+    }
+}