From 8f6c6e333c06ae1c3b9f00396563c14a2ae09b4d Mon Sep 17 00:00:00 2001
From: Darren Wihandi <65404740+fairywreath@users.noreply.github.com>
Date: Sun, 27 Apr 2025 14:31:34 -0600
Subject: Emit SPIRV NonReadable decoration for WTexture* (#6922)

---
 source/slang/slang-emit-spirv.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'source/slang/slang-emit-spirv.cpp')

diff --git a/source/slang/slang-emit-spirv.cpp b/source/slang/slang-emit-spirv.cpp
index d07d587e5..e4b5c2f4d 100644
--- a/source/slang/slang-emit-spirv.cpp
+++ b/source/slang/slang-emit-spirv.cpp
@@ -2767,6 +2767,7 @@ struct SPIRVEmitContext : public SourceEmitterBase, public SPIRVEmitSharedContex
             param->getDataType(),
             storageClass);
         maybeEmitPointerDecoration(varInst, param);
+        maybeEmitWriteOnlyImageDecoration(varInst, param);
         if (layout)
             emitVarLayout(param, varInst, layout);
         emitDecorations(param, getID(varInst));
@@ -5686,6 +5687,25 @@ struct SPIRVEmitContext : public SourceEmitterBase, public SPIRVEmitSharedContex
         maybeEmitPointerDecoration(varInst, inst->getDataType(), as<IRVar>(inst), inst->getOp());
     }
 
+    void maybeEmitWriteOnlyImageDecoration(SpvInst* varInst, IRInst* inst)
+    {
+        auto ptrType = as<IRPtrTypeBase>(inst->getDataType());
+        if (!ptrType)
+            return;
+        auto textureType = as<IRTextureType>(ptrType->getValueType());
+        if (!textureType)
+            return;
+
+        if (textureType->getAccess() == SLANG_RESOURCE_ACCESS_WRITE)
+        {
+            emitOpDecorate(
+                getSection(SpvLogicalSectionID::Annotations),
+                nullptr,
+                getID(varInst),
+                SpvDecorationNonReadable);
+        }
+    }
+
     SpvInst* emitParam(SpvInstParent* parent, IRInst* inst)
     {
         auto paramSpvInst = emitOpFunctionParameter(parent, inst, inst->getFullType());
-- 
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