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, 7 insertions, 0 deletions

diff --git a/tools/gfx/d3d12/d3d12-command-buffer.cpp b/tools/gfx/d3d12/d3d12-command-buffer.cpp
index 3a09da037..fb979d3b9 100644
--- a/tools/gfx/d3d12/d3d12-command-buffer.cpp
+++ b/tools/gfx/d3d12/d3d12-command-buffer.cpp
@@ -59,6 +59,13 @@ void CommandBufferImpl::init(
 
     reinit();
 
+    m_cmdList->QueryInterface<ID3D12GraphicsCommandList6>(m_cmdList6.writeRef());
+if (m_cmdList6)
+    {
+        m_cmdList4 = m_cmdList6;
+        m_cmdList1 = m_cmdList6;
+        return;
+    }
 #if SLANG_GFX_HAS_DXR_SUPPORT
     m_cmdList->QueryInterface<ID3D12GraphicsCommandList4>(m_cmdList4.writeRef());
     if (m_cmdList4)