// allocate a global/persistent webgpu-rendererlet webGpuRenderer = WebGPU.WebGpuRenderer()// class that contains persistent objects for democlass TriangleDemoInstance{//todo: need to save these per-devicevar pipeline : WebGPU.RenderPipeline?var vertexBuffer : WebGPU.Buffer?//can we get this from the surface view?var windowTextureFormat = TextureFormat.bgra8Unormfunc InitResources(device:Device){... create pipeline, vertex buffer, if not already allocated...}func Render(device:Device,encoder:CommandEncoder,surfaceView:TextureView){InitResources(device: device)guard let pipeline else{return}let renderPass = encoder.beginRenderPass(descriptor: RenderPassDescriptor(colorAttachments: [RenderPassColorAttachment(view: surfaceView,loadOp: .clear,storeOp: .store,clearValue: WebGPU.Color(r: 0, g: 1, b: 1, a: 1))]))renderPass.setPipeline(pipeline)renderPass.setVertexBuffer(slot: 0, buffer: vertexBuffer!)renderPass.draw(vertexCount: self.vertexCount!)renderPass.end()}}// instance of our persistent application rendererlet triangleDemo = TriangleDemoInstance()public struct TriangleView : View, WebGPU.ContentRenderer{public var body : some View{WebGpuView(contentRenderer: self).frame(maxWidth: .infinity, maxHeight: .infinity).background(.red) // debug}public func Render(contentRect: CGRect,layer:CAMetalLayer){do{try webGpuRenderer.Render(metalLayer: layer, getCommands:triangleDemo.Render )}catch let Error{print("Render error; \(Error.localizedDescription)")}}}