1 files changed, 120 insertions, 0 deletions
diff --git a/tools/gfx-unit-test/root-mutable-shader-object.cpp b/tools/gfx-unit-test/root-mutable-shader-object.cpp
new file mode 100644
index 000000000..8cd2abbd6
--- /dev/null
+++ b/tools/gfx-unit-test/root-mutable-shader-object.cpp
@@ -0,0 +1,120 @@
+#include "tools/unit-test/slang-unit-test.h"
+
+#include "slang-gfx.h"
+#include "gfx-test-util.h"
+#include "tools/gfx-util/shader-cursor.h"
+#include "source/core/slang-basic.h"
+
+using namespace gfx;
+
+namespace gfx_test
+{
+    void mutableRootShaderObjectTestImpl(IDevice* device, UnitTestContext* context)
+    {
+        Slang::ComPtr<ITransientResourceHeap> transientHeap;
+        ITransientResourceHeap::Desc transientHeapDesc = {};
+        transientHeapDesc.constantBufferSize = 4096;
+        GFX_CHECK_CALL_ABORT(
+            device->createTransientResourceHeap(transientHeapDesc, transientHeap.writeRef()));
+
+        ComPtr<IShaderProgram> shaderProgram;
+        slang::ProgramLayout* slangReflection;
+        GFX_CHECK_CALL_ABORT(loadComputeProgram(device, shaderProgram, "mutable-shader-object", "computeMain", slangReflection));
+
+        ComputePipelineStateDesc pipelineDesc = {};
+        pipelineDesc.program = shaderProgram.get();
+        ComPtr<gfx::IPipelineState> pipelineState;
+        GFX_CHECK_CALL_ABORT(
+            device->createComputePipelineState(pipelineDesc, pipelineState.writeRef()));
+
+        float initialData[] = { 0.0f, 1.0f, 2.0f, 3.0f };
+        const int numberCount = SLANG_COUNT_OF(initialData);
+        IBufferResource::Desc bufferDesc = {};
+        bufferDesc.sizeInBytes = sizeof(initialData);
+        bufferDesc.format = gfx::Format::Unknown;
+        bufferDesc.elementSize = sizeof(float);
+        bufferDesc.allowedStates = ResourceStateSet(
+            ResourceState::ShaderResource,
+            ResourceState::UnorderedAccess,
+            ResourceState::CopyDestination,
+            ResourceState::CopySource);
+        bufferDesc.defaultState = ResourceState::UnorderedAccess;
+        bufferDesc.cpuAccessFlags = AccessFlag::Write | AccessFlag::Read;
+
+        ComPtr<IBufferResource> numbersBuffer;
+        GFX_CHECK_CALL_ABORT(device->createBufferResource(
+            bufferDesc,
+            (void*)initialData,
+            numbersBuffer.writeRef()));
+
+        ComPtr<IResourceView> bufferView;
+        IResourceView::Desc viewDesc = {};
+        viewDesc.type = IResourceView::Type::UnorderedAccess;
+        viewDesc.format = Format::Unknown;
+        GFX_CHECK_CALL_ABORT(device->createBufferView(numbersBuffer, viewDesc, bufferView.writeRef()));
+
+        ComPtr<IShaderObject> rootObject;
+        device->createMutableRootShaderObject(shaderProgram, rootObject.writeRef());
+        auto entryPointCursor = ShaderCursor(rootObject->getEntryPoint(0));
+        entryPointCursor.getPath("buffer").setResource(bufferView);
+
+        slang::TypeReflection* addTransformerType =
+            slangReflection->findTypeByName("AddTransformer");
+        ComPtr<IShaderObject> transformer;
+        GFX_CHECK_CALL_ABORT(device->createMutableShaderObject(
+            addTransformerType, ShaderObjectContainerType::None, transformer.writeRef()));
+        entryPointCursor.getPath("transformer").setObject(transformer);
+
+        // Set the `c` field of the `AddTransformer`.
+        float c = 1.0f;
+        ShaderCursor(transformer).getPath("c").setData(&c, sizeof(float));
+
+        {
+            ICommandQueue::Desc queueDesc = { ICommandQueue::QueueType::Graphics };
+            auto queue = device->createCommandQueue(queueDesc);
+
+            auto commandBuffer = transientHeap->createCommandBuffer();
+            {
+                auto encoder = commandBuffer->encodeComputeCommands();
+                auto root = encoder->bindPipeline(pipelineState);
+                root->copyFrom(rootObject, transientHeap);
+                encoder->dispatchCompute(1, 1, 1);
+                encoder->endEncoding();
+            }
+
+            auto barrierEncoder = commandBuffer->encodeResourceCommands();
+            barrierEncoder->bufferBarrier(1, numbersBuffer.readRef(), ResourceState::UnorderedAccess, ResourceState::UnorderedAccess);
+            barrierEncoder->endEncoding();
+
+            // Mutate `transformer` object and run again.
+            c = 2.0f;
+            ShaderCursor(transformer).getPath("c").setData(&c, sizeof(float));
+            {
+                auto encoder = commandBuffer->encodeComputeCommands();
+                auto root = encoder->bindPipeline(pipelineState);
+                root->copyFrom(rootObject, transientHeap);
+                encoder->dispatchCompute(1, 1, 1);
+                encoder->endEncoding();
+            }
+
+            commandBuffer->close();
+            queue->executeCommandBuffer(commandBuffer);
+            queue->wait();
+        }
+
+        compareComputeResult(
+            device,
+            numbersBuffer,
+            Slang::makeArray<float>(3.0f, 4.0f, 5.0f, 6.0f));
+    }
+
+    SLANG_UNIT_TEST(mutableRootShaderObjectD3D12)
+    {
+        runTestImpl(mutableRootShaderObjectTestImpl, unitTestContext, Slang::RenderApiFlag::D3D12);
+    }
+
+    SLANG_UNIT_TEST(mutableRootShaderObjectVulkan)
+    {
+        runTestImpl(mutableRootShaderObjectTestImpl, unitTestContext, Slang::RenderApiFlag::Vulkan);
+    }
+}