Every shader now has the ability to declare which payload it uses. HitGroup, Miss and Callable shaders may only specify a single type, whereas Raygen shaders may provide more than one.
The global raytracing shader libraries have been categorized according to their payload type, which helps facilitate the creation of minimal ray-tracing pipelines.
Avoid adding callable shaders to the RTPSO if they are not being used.
All RHI shader compilers and shader loaders that support ray tracing have been modified to track an extra uint representing the payload type flagged in the source (at time of compilation).
Add the RayTracingPayloadType to the shadermap DDC key so that we can properly detect when a shader's payload type is invalidated. This is required because we serialize the payload type into the shaders from the C++ side.
#rb Yuriy.ODonnell
#jira none
#preflight 635715cae6096564af4dd28e
[CL 22742893 by chris kulla in ue5-main branch]
When filling out D3D12_FUNCTION_DESC, DXC does not populate RequiredFeatureFlags. Given we rely on these flags to validate bindless support at runtime, we need to emulate these flags being set.
#jira UE-162014
#rb elizabeth.baumel
#preflight 634488a6c272487ed4784593
[CL 22458354 by christopher waters in ue5-main branch]
- Adding support for bindless resources/samplers. The loose resources have to be wrapped in a macro that generates an index and proxy resource when bindless is enabled. Reflection has to parse these differently from other resources since they're parsed as uint parameters. The runtime also has to bind these differently since they end up needing to find their real resource in the binding data and then update a constant buffer.
- To assist in conversions, the shader compiler will detect if a shader is compiled with both bindless and non-bindless resources/samplers and will emit errors if that is the case.
- Adding support for bindless Uniform Buffer resources/samplers. Because Uniform Buffers aren't per-shader, they'll always update their constants with the bindless indices of their resources.
- Adding more flags to FShaderCodePackedResourceCounts required changing all the array initializations to individual parameters since not all the new flags are used everywhere.
- No shaders have been configured to support bindless resources/samplers. Yet.
#jira UE-139616
#rb zach.bethel, arciel.rekman
#preflight 6282b8ec44349a6581a21a39
[CL 20250348 by christopher waters in ue5-main branch]
- This fixes an issue where all SM6 compiles were reporting 0 instructions.
#rb christopher.waters
#jira FORT-468097
#preflight none
[CL 19742347 by Jason Nadro in ue5-main branch]
- SM6.6 not enabled just yet.
- Adding our own defines of __SHADER_TARGET_MAJOR and __SHADER_TARGET_MINOR to mimic the DXC defines. Since we preprocess, we can't rely on DXC to define them for us.
- Adding support for 64bit atomic operations
- Changing part of Nanite PC atomic permutation selection to be based on DataDrivenPlatformInfo
- Fixing DXC shader debugging. The PDB section was still being stripped from the final DXIL.
#jira none
#rb rune.stubbe
#preflight 61548928f5e4fd0001d7d0b3
#ROBOMERGE-OWNER: christopher.waters
#ROBOMERGE-AUTHOR: christopher.waters
#ROBOMERGE-SOURCE: CL 17665881 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v875-17642767)
#ROBOMERGE-CONFLICT from-shelf
[CL 17665943 by christopher waters in ue5-release-engine-test branch]
- Removed some unnecessary code from D3D shader compilers.
- Removing shader VendorExtensions runtime data from platforms that don't need them.
- Turning FShaderCodeFeatures into a set of flags to reduce its size. Adding a few new flags for future use.
- Moved the common D3D12 shader data and creation code into shared locations to cut down on code duplication.
- Removed the unnecessary copying of header data from all D3D12 shader types.
- Removed FD3D12ShaderBytecode since its values can be inferred from other shader data.
#jira none
#rb rolando.caloca, arciel.rekman
#preflight 6140c2df3aa82d000149f13b
#ROBOMERGE-AUTHOR: christopher.waters
#ROBOMERGE-SOURCE: CL 17509617 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v870-17433530)
[CL 17509631 by christopher waters in ue5-release-engine-test branch]
