Add Mesh and Task shader support to GFX (#3190)

* Bump vulkan headers

Also just use vulkan-headers as a submodule

* Add drawMeshTasks to gfx graphics pipelines

* Add DispatchMesh overload with no payload, with GLSL intrinsic

* Require spirv 1.4 for mesh shaders

* Add vulkan mesh shader feature discovery

* Add mesh shader stage bits to vk-util

* Add mesh and task shader support to render-test

* Add mesh and task tests

* Preserve "payload" specifier in task shaders

* Add mesh shader pipeline support to gfx

* Add TODO

* Add numThreads attribute for amplification stage

* Add payload to task shader test

* Drop dependency on d3dx12

* Allow passing payloads from task to mesh shaders

* regenerate vs projects

* check DispatchMesh name correctly

* Add mesh shader tests to failing tests

* Detect wave-ops feature on vulkan

* Add fuse-product to expected failures

This fails because the global varaible `count` is not initialized

* Add required extension to WaveMaskMatch SPIR-V impl

* Remove meshShader member from pipeline desc

* Identify mesh shader support on d3d12

1 files changed, 12 insertions, 0 deletions

diff --git a/tools/gfx/d3d12/d3d12-device.cpp b/tools/gfx/d3d12/d3d12-device.cpp
index 3f62c2d5c..ca624b99f 100644
--- a/tools/gfx/d3d12/d3d12-device.cpp
+++ b/tools/gfx/d3d12/d3d12-device.cpp
@@ -783,6 +783,18 @@ Result DeviceImpl::initialize(const Desc& desc)
                 }
             }
         }
+        // Check mesh shader support
+        {
+            D3D12_FEATURE_DATA_D3D12_OPTIONS7 options;
+            if (SLANG_SUCCEEDED(m_device->CheckFeatureSupport(
+                D3D12_FEATURE_D3D12_OPTIONS7, &options, sizeof(options))))
+            {
+                if (options.MeshShaderTier >= D3D12_MESH_SHADER_TIER_1)
+                {
+                    m_features.add("mesh-shader");
+                }
+            }
+        }
     }
 
     m_desc = desc;