Type layouts for structured buffers with counters (#3269)

* More tests for append structured buffer

* Append and Consume structured buffer tests for DX12

* neaten

* test wobble

* Add counter layout information to append/consume structured buffers

* add getRWStructuredBufferType

* Correct definition of get size for append/consume structured buffers

* tweak append structured buffer test

* Allow initializing counter buffer in render test

* vulkan test for consume structured buffer

* Handle null counterVarLayout in getExplicitCounterBindingRangeOffset

* remove dead code

* Implement atomic counter increment/decrement for spirv

* explicit spirv test

* Add missing check on result

* Hold on to counter resources

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/source/slang/slang-ast-builder.cpp b/source/slang/slang-ast-builder.cpp
index 6a9aad257..ce13ab650 100644
--- a/source/slang/slang-ast-builder.cpp
+++ b/source/slang/slang-ast-builder.cpp
@@ -358,6 +358,11 @@ HLSLStructuredBufferType* ASTBuilder::getStructuredBufferType(Type* elementType)
     return as<HLSLStructuredBufferType>(getSpecializedBuiltinType(elementType, "HLSLStructuredBufferType"));
 }
 
+HLSLRWStructuredBufferType* ASTBuilder::getRWStructuredBufferType(Type* elementType)
+{
+    return as<HLSLRWStructuredBufferType>(getSpecializedBuiltinType(elementType, "HLSLRWStructuredBufferType"));
+}
+
 SamplerStateType* ASTBuilder::getSamplerStateType()
 {
     return as<SamplerStateType>(getSpecializedBuiltinType(nullptr, "HLSLStructuredBufferType"));