Add tests for TextureCube

[Icohedron]

References

• https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/texturecube
• Existing Texture2D offload tests: offload-test-suite/test/Feature/Textures/Texture2D.*.test.yaml

Description

Add runtime GPU offload tests for TextureCube. TextureCube uses float3 direction vectors for sampling. It does not support Load, operator[], mips, or offset parameters. It does support Gather/GatherCmp (unlike Texture1D/Texture3D).

Tasks

• Add TextureCube to offload-test-suite ResourceKind

  • offload-test-suite/include/Support/Pipeline.h — add TextureCube to ResourceKind enum, update isRaw(), isSampler(), isTexture(), isReadWrite(), isSampledTexture(), and ScalarEnumerationTraits
  • offload-test-suite/lib/API/VK/Device.cpp — add TextureCube cases: VkDescriptorType, VkImageViewType (VK_IMAGE_VIEW_TYPE_CUBE), image creation with 6 layers
  • offload-test-suite/lib/API/DX/Device.cpp — add TextureCube cases: D3D12_SRV_DIMENSION_TEXTURECUBE, SRV descriptor setup
  • offload-test-suite/lib/API/MTL/MTLDevice.cpp — add TextureCube case for Metal texture type mapping

• Write tests (offload-test-suite/test/Feature/Textures/)

  • Sample.test — Sample(SamplerState, float3) (no offset overloads)
  • SampleBias.test — SampleBias(SamplerState, float3, float)
  • SampleGrad.test — SampleGrad(SamplerState, float3, float3, float3)
  • SampleCmp.test — SampleCmp(SamplerComparisonState, float3, float)
  • Gather.test — Gather(SamplerState, float3) (no offset overload)
  • GatherCmp.test — GatherCmp(SamplerComparisonState, float3, float) (no offset overload)
  • CalculateLevelOfDetail.test — CalculateLevelOfDetail(SamplerState, float3)
  • Sampler.filter.test — sampler min/mag filter behaviour
  • Sampler.address.test — sampler address modes
  • Sampler.mips.test — sampler mip selection