First pass support for half on vk (#912)

* Look at getting half to work on vk.

* Alter half test so can always produce consistent test results.

* First pass working half on vk.

* Improve comments for vulkan extensions around half.

* Upgraded vulkan headers to v1.1.103

https://github.com/KhronosGroup/Vulkan-Headers

* * Add getFeatures on Render interface
* Vulkan renderer determines at startup if it can support half
* Parse render-features on render-test

* Small changes to half-calc.slang test.

* Structured buffer half access works as expected for Vk, but isn't for dx12, so disable for now.

* Require the half feature for renderers for the half-structured-buffer.slang test.

* * Added ToolReturnCode to be more rigerous about how a return code is passed back from a tool
* Added support for a tool being able to pass back an 'ignored' result.
* Used enum codes to indicate meanings
* Made spawnAndWait return a ToolReturnCode

* Ignore tests that don't have required render-feature

* Fix macro line continuation usage.

* Check dx12 has half support.

* Checking for half on dx12 - if CheckFeatureSupport fails, don't fail renderer initialization.

* Fix typo.

1 files changed, 21 insertions, 0 deletions

diff --git a/tools/gfx/render-d3d12.cpp b/tools/gfx/render-d3d12.cpp
index 0b611a219..5483e7e4b 100644
--- a/tools/gfx/render-d3d12.cpp
+++ b/tools/gfx/render-d3d12.cpp
@@ -55,6 +55,7 @@ class D3D12Renderer : public Renderer
 public:
     // Renderer    implementation
     virtual SlangResult initialize(const Desc& desc, void* inWindowHandle) override;
+    virtual const List<String>& getFeatures() override { return m_features; }
     virtual void setClearColor(const float color[4]) override;
     virtual void clearFrame() override;
     virtual void presentFrame() override;
@@ -571,6 +572,8 @@ protected:
     PFN_D3D12_SERIALIZE_ROOT_SIGNATURE m_D3D12SerializeRootSignature = nullptr;
 
     HWND m_hwnd = nullptr;
+
+    List<String> m_features;
 };
 
 Renderer* createD3D12Renderer()
@@ -1397,6 +1400,8 @@ Result D3D12Renderer::initialize(const Desc& desc, void* inWindowHandle)
         return SLANG_FAIL;
     }
 
+
+
     FlagCombiner combiner;
     // TODO: we should probably provide a command-line option
     // to override UseDebug of default rather than leave it
@@ -1426,6 +1431,22 @@ Result D3D12Renderer::initialize(const Desc& desc, void* inWindowHandle)
         return SLANG_FAIL;
     }
 
+    // Find what features are supported
+    {
+        // Check this is how this is laid out...
+        SLANG_COMPILE_TIME_ASSERT(D3D_SHADER_MODEL_6_0 == 0x60);
+
+        D3D12_FEATURE_DATA_SHADER_MODEL featureShaderMode;
+        featureShaderMode.HighestShaderModel = D3D_SHADER_MODEL(0x62);
+
+        if (SLANG_SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_SHADER_MODEL, &featureShaderMode, sizeof(featureShaderMode))) &&
+            featureShaderMode.HighestShaderModel >= 0x62)
+        {
+            // With sm_6_2 we have half
+            m_features.Add("half");
+        }
+    }
+
     m_numRenderFrames = 3;
     m_numRenderTargets = 2;