From 88023aea669f258d66e53eab10215337a7f72853 Mon Sep 17 00:00:00 2001 From: Tim Foley Date: Thu, 19 Oct 2017 11:49:16 -0700 Subject: Reflection: allow querying of semantics on varying input/output (#224) This is functionality required to support a Falcor bug fix. Most of the code to compute the right semantic name/index for a parameter was already present. This change adds: - Storage for semantic name/index on every `VarLayout` - Note: this is wasteful and should be optimized later - A public API to query the semantic name/index - The contract is that this API returns `NULL` if the parameter had no semantic - A bit of work in `parameter-binding.cpp` to attach semantics to varying input/output when traversing varying parameters. - Note: this is intentionally set up so that it associates semantics even with non-leaf parameters, so that an API user can query the semantic of a `struct` parameter and know that its members will be assigned sequential semantic indices from its starting value. - Support for dumping this information in reflection tests One notable thing that I did *not* change here is that the reflection test fixture doesn't report information on the output of an entry point, even though it really should. That should be fixed in a separate change, though, because it would affect many of the expected outputs. --- source/slang/reflection.cpp | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'source/slang/reflection.cpp') diff --git a/source/slang/reflection.cpp b/source/slang/reflection.cpp index 435b4db3f..d7e8820c0 100644 --- a/source/slang/reflection.cpp +++ b/source/slang/reflection.cpp @@ -623,6 +623,28 @@ SLANG_API size_t spReflectionVariableLayout_GetSpace(SlangReflectionVariableLayo return info->space; } +SLANG_API char const* spReflectionVariableLayout_GetSemanticName(SlangReflectionVariableLayout* inVarLayout) +{ + auto varLayout = convert(inVarLayout); + if(!varLayout) return 0; + + if (!(varLayout->flags & Slang::VarLayoutFlag::HasSemantic)) + return 0; + + return varLayout->semanticName.Buffer(); +} + +SLANG_API size_t spReflectionVariableLayout_GetSemanticIndex(SlangReflectionVariableLayout* inVarLayout) +{ + auto varLayout = convert(inVarLayout); + if(!varLayout) return 0; + + if (!(varLayout->flags & Slang::VarLayoutFlag::HasSemantic)) + return 0; + + return varLayout->semanticIndex; +} + // Shader Parameter Reflection -- cgit v1.2.3