From a90c850735664e2928e4cc961442a126c6859b97 Mon Sep 17 00:00:00 2001
From: Tim Foley <tfoleyNV@users.noreply.github.com>
Date: Tue, 26 Jan 2021 13:32:03 -0800
Subject: Integrate reflection more deeply into gfx layer (#1677)

---
 tools/gfx/cuda/render-cuda.cpp | 43 ++++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 12 deletions(-)

(limited to 'tools/gfx/cuda/render-cuda.cpp')

diff --git a/tools/gfx/cuda/render-cuda.cpp b/tools/gfx/cuda/render-cuda.cpp
index 0e4ee6c13..d1e320224 100644
--- a/tools/gfx/cuda/render-cuda.cpp
+++ b/tools/gfx/cuda/render-cuda.cpp
@@ -241,6 +241,8 @@ public:
     RefPtr<TextureCUDAResource> textureResource = nullptr;
 };
 
+class CUDAProgramLayout;
+
 class CUDAShaderProgram : public IShaderProgram, public RefObject
 {
 public:
@@ -255,6 +257,9 @@ public:
     CUmodule cudaModule = nullptr;
     CUfunction cudaKernel;
     String kernelName;
+    ComPtr<slang::IComponentType> slangProgram;
+    RefPtr<CUDAProgramLayout> layout;
+
     ~CUDAShaderProgram()
     {
         if (cudaModule)
@@ -1260,16 +1265,6 @@ private:
         return SLANG_OK;
     }
 
-    virtual SLANG_NO_THROW Result SLANG_MCALL createRootShaderObjectLayout(
-        slang::ProgramLayout* layout, IShaderObjectLayout** outLayout) override
-    {
-        RefPtr<CUDAProgramLayout> cudaLayout;
-        cudaLayout = new CUDAProgramLayout(layout);
-        cudaLayout->programLayout = layout;
-        *outLayout = cudaLayout.detach();
-        return SLANG_OK;
-    }
-
     virtual SLANG_NO_THROW Result SLANG_MCALL
         createShaderObject(IShaderObjectLayout* layout, IShaderObject** outObject) override
     {
@@ -1280,10 +1275,13 @@ private:
     }
 
     virtual SLANG_NO_THROW Result SLANG_MCALL
-        createRootShaderObject(IShaderObjectLayout* layout, IShaderObject** outObject) override
+        createRootShaderObject(IShaderProgram* program, IShaderObject** outObject) override
     {
+        auto cudaProgram = dynamic_cast<CUDAShaderProgram*>(program);
+        auto cudaLayout = cudaProgram->layout;
+
         RefPtr<CUDARootShaderObject> result = new CUDARootShaderObject();
-        SLANG_RETURN_ON_FAIL(result->init(this, dynamic_cast<CUDAShaderObjectLayout*>(layout)));
+        SLANG_RETURN_ON_FAIL(result->init(this, cudaLayout));
         *outObject = result.detach();
         return SLANG_OK;
     }
@@ -1300,6 +1298,11 @@ private:
     virtual SLANG_NO_THROW Result SLANG_MCALL
         createProgram(const IShaderProgram::Desc& desc, IShaderProgram** outProgram) override
     {
+        if( desc.kernelCount == 0 )
+        {
+            return createProgramFromSlang(this, desc, outProgram);
+        }
+
         if (desc.kernelCount != 1)
             return SLANG_E_INVALID_ARG;
         RefPtr<CUDAShaderProgram> cudaProgram = new CUDAShaderProgram();
@@ -1307,6 +1310,22 @@ private:
         SLANG_CUDA_RETURN_ON_FAIL(
             cuModuleGetFunction(&cudaProgram->cudaKernel, cudaProgram->cudaModule, desc.kernels[0].entryPointName));
         cudaProgram->kernelName = desc.kernels[0].entryPointName;
+
+        auto slangProgram = desc.slangProgram;
+        if( slangProgram )
+        {
+            cudaProgram->slangProgram = slangProgram;
+
+            auto slangProgramLayout = slangProgram->getLayout();
+            if(!slangProgramLayout)
+                return SLANG_FAIL;
+
+            RefPtr<CUDAProgramLayout> cudaLayout;
+            cudaLayout = new CUDAProgramLayout(slangProgramLayout);
+            cudaLayout->programLayout = slangProgramLayout;
+            cudaProgram->layout = cudaLayout;
+        }
+
         *outProgram = cudaProgram.detach();
         return SLANG_OK;
     }
-- 
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