From 5290c580632cfb56847b863a32dc020a21d1c93e Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Fri, 10 Jan 2025 10:57:04 -0800
Subject: Initial implementation of SP#015 `DescriptorHandle<T>`. (#6028)

* Initial implementation of `ResourcePtr<T>`.

* Update docs

* Fix build error.

* Add more discussion.

* Update documentation.

* Update TOC.

* Fix.

* Fix.

* Add test case for custom `getResourceFromBindlessHandle`.

* Add namehint to generated descriptor heap param.

* Fix.

* Fix.

* format code

* Rename to `DescriptorHandle`, and add `T.Handle` alias.

* Fix compiler error.

* Fix.

* Fix build.

* Renames.

* Fix documentation.

* Documentation fix.

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
---
 source/slang/slang-type-layout.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'source/slang/slang-type-layout.cpp')

diff --git a/source/slang/slang-type-layout.cpp b/source/slang/slang-type-layout.cpp
index 98a324d96..d7b303535 100644
--- a/source/slang/slang-type-layout.cpp
+++ b/source/slang/slang-type-layout.cpp
@@ -2523,7 +2523,7 @@ SourceLanguage getIntermediateSourceLanguageForTarget(TargetProgram* targetProgr
 
 bool areResourceTypesBindlessOnTarget(TargetRequest* targetReq)
 {
-    return isCPUTarget(targetReq) || isCUDATarget(targetReq);
+    return isCPUTarget(targetReq) || isCUDATarget(targetReq) || isMetalTarget(targetReq);
 }
 
 static bool isD3D11Target(TargetRequest*)
@@ -4802,6 +4802,15 @@ static TypeLayoutResult _createTypeLayout(TypeLayoutContext& context, Type* type
             type,
             rules);
     }
+    else if (auto resPtrType = as<DescriptorHandleType>(type))
+    {
+        if (areResourceTypesBindlessOnTarget(context.targetReq))
+            return _createTypeLayout(context, resPtrType->getElementType());
+        auto uint2Type = context.astBuilder->getVectorType(
+            context.astBuilder->getUIntType(),
+            context.astBuilder->getIntVal(context.astBuilder->getIntType(), 2));
+        return _createTypeLayout(context, uint2Type);
+    }
     else if (auto optionalType = as<OptionalType>(type))
     {
         // OptionalType should be laid out the same way as Tuple<T, bool>.
-- 
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