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, 8 insertions, 0 deletions

diff --git a/tools/gfx/vulkan/vk-command-encoder.cpp b/tools/gfx/vulkan/vk-command-encoder.cpp
index dcd33fd19..ddb48833f 100644
--- a/tools/gfx/vulkan/vk-command-encoder.cpp
+++ b/tools/gfx/vulkan/vk-command-encoder.cpp
@@ -1214,6 +1214,14 @@ Result RenderCommandEncoder::drawIndexedInstanced(
     return SLANG_OK;
 }
 
+Result RenderCommandEncoder::drawMeshTasks(int x, int y, int z)
+{
+    SLANG_RETURN_ON_FAIL(prepareDraw());
+    auto& api = *m_api;
+    api.vkCmdDrawMeshTasksEXT(m_vkCommandBuffer, x, y, z);
+    return SLANG_OK;
+}
+
 void ComputeCommandEncoder::endEncoding() { endEncodingImpl(); }
 
 Result ComputeCommandEncoder::bindPipeline(