Metal:为MSL cikernel设置编译器和链接器选项后，.metal文件中定义的vertexFunction变为nil [英] Metal: vertexFunction defined in .metal file becomes nil once setting Compiler and Linker Options for MSL cikernel

问题描述

.metal文件中定义的VertexFunction和FragmentFunction可以很好地工作，但是一旦我在

VertexFunction and FragmentFunction defined in .metal file worked nicely, but they became nil once I specified Compiler and Linker Options following Apple's doc: -fcikernel flag in the Other Metal Compiler Flags option, and -cikernel flat in MTLLINKER_FLAGS in User-Defined setting.

我需要使用MSL(金属阴影语言)的香ker的上述设置.实际上，使用Core Image Kernel Language的cikernel在12.0中已弃用.

I need the settings above for cikernel with MSL (metal shading language). Indeed, cikernel with Core Image Kernel Language deprecated in 12.0.

我如何同时使用顶点/片段金属着色器和MSL香石?

How could I use both vertex/fragment Metal shader and MSL cikernel together?

let library = self.device?.makeDefaultLibrary()!
let pipeLineDescriptor = MTLRenderPipelineDescriptor()
pipeLineDescriptor.vertexFunction=library.makeFunction(name: "myVertexShader")
pipeLineDescriptor.fragmentFunction=library.makeFunction(name: "myFragmentShader")

推荐答案

我想您必须分别编译过滤器内核，而不是使用默认的Metal库.

I guess you have to compile your filter kernels separately instead of with your default Metal library.

为此，例如，您可以给他们另一个文件扩展名，例如.kernel，并添加一个自定义的 Build Rule ，如下所示:

To do so, you could for instance give them another file extension, like .kernel and add a custom Build Rule like so:

然后添加一个自定义的 Build Phase ，将已编译的内核metallib复制到您的应用程序包中:

Then add a custom Build Phase that copies the compiled kernel metallibs into your app bundle:

要使用正确的金属源初始化CIKernel，您可以执行以下操作:

To initialize the CIKernel with the correct metal source, you can do something like this:

let url = Bundle(for: type(of: self)).url(forResource: "<#name of your .kernel file#>", withExtension: "metallib")!
let data = try! Data(contentsOf: url)
let kernel = try! CIKernel(functionName: "<#kernel function name#>", fromMetalLibraryData: data)

(请注意，应从项目设置中再次删除编译器和liker标志，以使其他Metal源再次正确编译.)

(Note that you should remove the compiler and liker flags again from your project settings to have your other Metal sources compile properly again.)

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