- move uniform buffer cleanup and dead stripping into ShaderPreprocessor module's PreprocessShader function
- add "required symbols" to compiler input struct to specify additional symbols to keep during minification aside from those specified by the entrypoint; modify API such that both an entry point string and additional symbols can be specified (to avoid each backend needing to manually parse the compound RT entry point string)
- make use of ModifyShaderCompilerInput in all backends to set additional defines and required symbols on input struct up front; only use the AdditionalDefines map in cases where it's actually necessary
- remove the various per-platform defines for enabling minifier, no longer required now that this has been rolled out for all backends
- fix SCW directcompile mode; this had rotted due to pieces of the FShaderCompilerEnvironment having been added that weren't explicitly serialized to either cmdline or in the shader source. this now serializes as a base64 string written inside the USF containing all portions of the environment required for compilation (using the same serialization function as is used to write/read the SCW input file)
- use a debug flag for indicating we're in "direct compile" mode and should load the debug USF off disk, rather than the poorly named "bSkipPreprocessedCache" (this name is both inaccurate and also confusing due to the addition of the preprocessed job cache)
- modify platform "force wave32" mechanism to use a pragma directive to set a compiler define, instead of doing string replacement in the preprocessed source
- add a view version of the RT entrypoint parsing to use in preprocessing, note that other paths still need to construct fstrings due to further manipulation so keeping the FString path around too
- clean up backends manually checking the "directcompile" cmdline arg
#rb christopher.waters, Yuriy.ODonnell
#rb Chris.Waters
#rb Laura.Hermanns
[CL 30023082 by dan elksnitis in ue5-main branch]
- Forcing EShaderResourceUsageFlags bindless flags when bindless is enabled to avoid ping ponging issues at runtime.
#jira UE-162014
#rb dan.elksnitis
[CL 30001874 by christopher waters in ue5-main branch]
- Only log a system error message if we didn't get any error messages back from the DXC error blob.
#rb Laura.Hermanns
#rnx
[CL 29810728 by jason nadro in ue5-main branch]
- Adding EShaderCodeFeatures::Barycentrics
- Adding GRHIGlobals.SupportsBarycentricsSemantic
- Adding FDataDrivenShaderPlatformInfo::GetSupportsBarycentricsIntrinsics to control COMPILER_SUPPORTS_BARYCENTRIC_INTRINSICS
- Adding FDataDrivenShaderPlatformInfo::GetSupportsBarycentricsSemantic to control PLATFORM_SUPPORTS_BARYCENTRICS_SEMANTIC
#jira UE-193429
#rb graham.wihlidal, mihnea.balta
[CL 29771745 by christopher waters in ue5-main branch]
The PDB name is either retrieved from the PDB blob part of DXC's output, or is generated using the shader hash that DXC reports even when no PDB is requested. We don't export PDBs because it would result in duplicate data as we use embedded PDBs.
#rb christopher.waters, Laura.Hermanns
[CL 29723169 by daniele vettorel in ue5-main branch]
- ELanguage and Input flags were being used inconsistently to determine defines and shader profiles to use.
- ED3DShaderModel now communicates the exact shader model to use to the FXC and DXC backends.
- Moved all D3D custom definitions to ModifyShaderCompilerInput
- D3D definitions have been fixed to be based on specific needs of input flags. ie- "PLATFORM_MAX_SAMPLERS" doesn't imply that wave operations are wanted/supported.
#jira UE-199838
#rb laura.hermanns, michael.wanderson
[CL 29632531 by christopher waters in ue5-main branch]
- Removing the need for COMPILER_DEFINE on GetResourceFromHeap and GetSamplerFromHeap
- FShaderParameterParser constructor now requires a FPlatformConfiguration object that each shader format can configure.
- FPlatformConfiguration::GenerateBindlessAccess allows each platform to generate the code for accessing a bindless resource or sampler.
- Added EShaderParameterParserConfigurationFlags to specify support for stable constant buffers and bindless.
- Moved EBindlessParameterMode into EShaderParameterParserConfigurationFlags::BindlessUsesArrays
- While moving things around, I was able to convert some TCHAR* uses to FStringView
#jira UE-166341
#rb mihnea.balta
[CL 29533376 by christopher waters in ue5-main branch]
- Compile a 2nd time internally defined rule disabled.
- Compile a 3rd time without optimizations as a last resort.
#jira UE-197481
#rb Jason.Nadro, Dan.Elksnitis, Sebastien.Hillaire
#rnx
[CL 29408297 by laura hermanns in ue5-main branch]
- Patch HLSL to support SV_DepthGreaterEqual and SV_DepthLessEqual.
- Maintain order of shader input/output variables in cross-compiled HLSL.
#rb Jason.Nadro
#jira UE-186066, UE-192125
#rnx
[CL 28633421 by laura hermanns in ue5-main branch]
- Moving more uses of ShaderParameterParse from Preprocessing to Compile step.
- Adding a "DidModifyShader" flag to ShaderParameterParser to determine if Output.ModifiedShaderSource needs to be updated.
#jira UE-197328
#rb dan.elksnitis
[CL 28569175 by christopher waters in ue5-main branch]
