I have a very simple Mac app with just a MTKView in it which shows a single color. I want to move the rendering code to C++. For this I created a C++ framework target which interoperates with the Swift code - main project target. I am trying to link metal-cpp library to the C++ framework target using these instructions. Approach described in this article works with simple C++ Mac console apps. But in my mixed Swift/C++ project Xcode cannot find Foundation/Foundation.hpp (and probably other headers) to include into the C++ header. I inserted metal-cpp folder into my project and added it to C++ target's header search paths, as written in the instructions.

I'm trying to create a custom Metal-based visual effect as a UIView to be used inside an existing UIKit-based interface. (An example might be a view that applies a blur effect to what's behind it.) I need to capture the MTLTexture of what's behind the view so that I can feed it to MTLRenderCommandEncoder.setFragmentTexture(_:index:). Can someone show me how or point me to an example? Thanks!

I use xcode16 and swiftUI for programming on a macos15 system. There is a problem. When I render a picture through mtkview, it is normal when displayed on a regular view. However, when the view is displayed through the .sheet method, the image cannot be displayed. There is no error message from xcode. import Foundation import MetalKit import SwiftUI struct CIImageDisplayView: NSViewRepresentable { typealias NSViewType = MTKView var ciImage: CIImage init(ciImage: CIImage) { self.ciImage = ciImage } func makeNSView(context: Context) -> MTKView { let view = MTKView() view.delegate = context.coordinator view.preferredFramesPerSecond = 60 view.enableSetNeedsDisplay = true view.isPaused = true view.framebufferOnly = false if let defaultDevice = MTLCreateSystemDefaultDevice() { view.device = defaultDevice } view.delegate = context.coordinator return view } func updateNSView(_ nsView: MTKView, context: Context) { } func makeCoordinator() -> RawDisplayRender { RawDisplayRender(ciImage: self.ciImage) } class RawDisplayRender: NSObject, MTKViewDelegate { // MARK: Metal resources var device: MTLDevice! var commandQueue: MTLCommandQueue! // MARK: Core Image resources var context: CIContext! var ciImage: CIImage init(ciImage: CIImage) { self.ciImage = ciImage self.device = MTLCreateSystemDefaultDevice() self.commandQueue = self.device.makeCommandQueue() self.context = CIContext(mtlDevice: self.device) } func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {} func draw(in view: MTKView) { guard let currentDrawable = view.currentDrawable, let commandBuffer = commandQueue.makeCommandBuffer() else { return } let dSize = view.drawableSize let drawImage = self.ciImage let destination = CIRenderDestination(width: Int(dSize.width), height: Int(dSize.height), pixelFormat: view.colorPixelFormat, commandBuffer: commandBuffer, mtlTextureProvider: { () -> MTLTexture in return currentDrawable.texture }) _ = try? self.context.startTask(toClear: destination) _ = try? self.context.startTask(toRender: drawImage, from: drawImage.extent, to: destination, at: CGPoint(x: (dSize.width - drawImage.extent.width) / 2, y: 0)) commandBuffer.present(currentDrawable) commandBuffer.commit() } } } struct ShowCIImageView: View { let cii = CIImage.init(contentsOf: Bundle.main.url(forResource: "9-10", withExtension: "jpg")!)! var body: some View { CIImageDisplayView.init(ciImage: cii).frame(width: 500, height: 500).background(.red) } } struct ContentView: View { @State var showImage = false var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello, world!") ShowCIImageView() Button { showImage = true } label: { Text("showImage") } } .frame(width: 800, height: 800) .padding() .sheet(isPresented: $showImage) { ShowCIImageView() } } }

Guten Tag, my project is simple, first I want draw wired Hexa,-Tetra- and Octahedrons. I draw a cube with Metal but I didn't found rotation, translation and scale. I have searched help , the examples I found are too complicated for me. Mit freundlichen Grüßen VanceRegnet

hello everyone. I got a texture loading error on visionOS 2.0: Can't create texture(Error Domain=MTKTextureLoaderErrorDomain Code=0 "Pixel format(MTLPixelFormatInvalid) is not valid on this device" UserInfo={NSLocalizedDescription=Pixel format(MTLPixelFormatInvalid) is not valid on this device, MTKTextureLoaderErrorKey=Pixel format(MTLPixelFormatInvalid) is not valid on this device} But this texture can load correctly on visionOS1.3. I don't know what happen between visionOS1.3 and visionOS2.0. The texture is a ktx file which stores cubemap that encoding in astc6x6hdr. And the ktx texture has a glInternalFormat info: GL_COMPRESSED_RGBA_ASTC_6x6. I wonder if visionOS2.0 no longer supports astc6x6hdr cubemap format, or there is something wrong with my assets.