53 lines
2.0 KiB
Swift
Executable File
53 lines
2.0 KiB
Swift
Executable File
|
|
import MetalKit
|
|
|
|
public class MetalView: NSObject, MTKViewDelegate {
|
|
|
|
public var device: MTLDevice!
|
|
var queue: MTLCommandQueue!
|
|
var cps: MTLComputePipelineState!
|
|
var time: Float = 0
|
|
var timeBuffer: MTLBuffer!
|
|
|
|
override public init() {
|
|
super.init()
|
|
registerShaders()
|
|
}
|
|
|
|
func registerShaders() {
|
|
device = MTLCreateSystemDefaultDevice()!
|
|
queue = device.makeCommandQueue()
|
|
let path = Bundle.main.path(forResource: "Shaders", ofType: "metal")
|
|
do {
|
|
let input = try String(contentsOfFile: path!, encoding: String.Encoding.utf8)
|
|
let library = try device.makeLibrary(source: input, options: nil)
|
|
let kernel = library.makeFunction(name: "compute")!
|
|
cps = try device.makeComputePipelineState(function: kernel)
|
|
} catch let e {
|
|
Swift.print("\(e)")
|
|
}
|
|
timeBuffer = device!.makeBuffer(length: MemoryLayout<Float>.size, options: [])
|
|
}
|
|
|
|
public func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {}
|
|
|
|
public func draw(in view: MTKView) {
|
|
if let drawable = view.currentDrawable,
|
|
let commandBuffer = queue.makeCommandBuffer(),
|
|
let commandEncoder = commandBuffer.makeComputeCommandEncoder() {
|
|
commandEncoder.setComputePipelineState(cps)
|
|
commandEncoder.setTexture(drawable.texture, index: 0)
|
|
commandEncoder.setBuffer(timeBuffer, offset: 0, index: 0)
|
|
time += 0.01
|
|
let bufferPointer = timeBuffer.contents()
|
|
memcpy(bufferPointer, &time, MemoryLayout<Float>.size)
|
|
let threadGroupCount = MTLSizeMake(8, 8, 1)
|
|
let threadGroups = MTLSizeMake(drawable.texture.width / threadGroupCount.width, drawable.texture.height / threadGroupCount.height, 1)
|
|
commandEncoder.dispatchThreadgroups(threadGroups, threadsPerThreadgroup: threadGroupCount)
|
|
commandEncoder.endEncoding()
|
|
commandBuffer.present(drawable)
|
|
commandBuffer.commit()
|
|
}
|
|
}
|
|
}
|