使用 DirectxShaderCompiler 生成带有 -fvk-use-scalar-layout 标志的 SPIR-V 会导致验证层错误

发布于 2025-01-10 23:26:58 字数 871 浏览 0 评论 0原文

我有一个相当简单的 HLSL 着色器，正在使用 DirectxShaderCompiler 将其编译为 SPIR-V。但是，使用标量布局会导致验证层错误。我在创建 VkDevice 时启用了 VK_EXT_SCALAR_BLOCK_LAYOUT_EXTENSION_NAME 扩展。它是验证层，还是 dxc bug，还是我需要额外的标志来生成 SPIR-V？

生成 SPIR-V 的命令：

COMMAND $ENV{VULKAN_SDK}/bin/dxc -spirv -fvk-use-scalar-layout -fvk-invert-y -T vs_6_0 -E ${vertexEntry} ${file} -Fo ${CMAKE_SOURCE_DIR}/Assets/${vertexEntry}.spv

验证层错误：

Validation Error: [ UNASSIGNED-CoreValidation-Shader-InconsistentSpirv ] Object 0: handle = 0x1e320175dc0, type = VK_OBJECT_TYPE_DEVICE; | MessageID = 0x6bbb14 | SPIR-V module not valid: Structure id 7 decorated as BufferBlock for variable in Uniform storage class must follow relaxed storage buffer layout rules: member 1 is an improperly straddling vector at offset 12
  %Vertex = OpTypeStruct %v3float %v3float %v2float

原文

I have a fairly simple HLSL shader that is being compiled into SPIR-V using DirectxShaderCompiler. Though, using scalar layout causes validation layer error. I have enabled the VK_EXT_SCALAR_BLOCK_LAYOUT_EXTENSION_NAME extension while creating the VkDevice. Is it a validation layer, or dxc bug or do I require an additional flag to generate SPIR-V?

Command to generate SPIR-V:

COMMAND $ENV{VULKAN_SDK}/bin/dxc -spirv -fvk-use-scalar-layout -fvk-invert-y -T vs_6_0 -E ${vertexEntry} ${file} -Fo ${CMAKE_SOURCE_DIR}/Assets/${vertexEntry}.spv

Validation layer error:

Validation Error: [ UNASSIGNED-CoreValidation-Shader-InconsistentSpirv ] Object 0: handle = 0x1e320175dc0, type = VK_OBJECT_TYPE_DEVICE; | MessageID = 0x6bbb14 | SPIR-V module not valid: Structure id 7 decorated as BufferBlock for variable in Uniform storage class must follow relaxed storage buffer layout rules: member 1 is an improperly straddling vector at offset 12
  %Vertex = OpTypeStruct %v3float %v3float %v2float

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