What is the equivalent in metal of glEnable(GL_STENCIL_TEST)?

Question

What is the equivalent in metal of glEnable(GL_STENCIL_TEST)? The Stencil Test is a per-sample operation performed after the Fragment Shader. The fragment's stencil value is tested against the value in the current stencil buffer; if the test fails, the fragment is culled.

Answer 1

Use a depth-stencil state object created from a descriptor whose frontFaceStencil and/or backFaceStencil are set to descriptors with a stencilCompareFunction other than MTLCompareFunctionAlways.