Comments (2)
bjornbytes
commented on June 2, 2024
This MoltenVK issue is from 2019 and was already fixed but is somewhat similar to what is happening:
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bjornbytes
commented on June 2, 2024
I just tested this on macOS! I got the following validation error with t.graphics.debug = true:
Validation Error: [ VUID-VkVertexInputBindingDescription-stride-04456 ] Object 0: handle = 0x7f87a9875818, type = VK_OBJECT_TYPE_DEVICE; | MessageID = 0x1606ae17 | Invalid Pipeline CreateInfo[0] (portability error): Vertex input stride must be at least as large as and a multiple of VkPhysicalDevicePortabilitySubsetPropertiesKHR::minVertexInputBindingStrideAlignment. The Vulkan spec states: If the VK_KHR_portability_subset extension is enabled, stride must be a multiple of, and at least as large as, VkPhysicalDevicePortabilitySubsetPropertiesKHR::minVertexInputBindingStrideAlignment (https://vulkan.lunarg.com/doc/view/1.3.224.1/mac/1.3-extensions/vkspec.html#VUID-VkVertexInputBindingDescription-stride-04456)
minVertexInputBindingStrideAlignment is 4 on MoltenVK. LÖVR currently uses vertex strides of zero for missing attributes, which causes undefined behavior on MoltenVK. Even though the shader is just using a push constant, I believe the undefined behavior here is causing the issue.
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