Add `-fvk-use-dx-position-w` and fix ExecutionMode ordering for geometry shaders. (#3731)

* Add `-fvk-use-dx-position-w`.

* Fix ordering of OutputVertices and output primitive type decoration in spirv.

* Fix.

* fix

* Fix.

* Move test around.

1 files changed, 1 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index fc242dbf1..28835f713 100644
--- a/slang.h
+++ b/slang.h
@@ -874,6 +874,7 @@ extern "C"
             VulkanBindShift,            // intValue0 (higher 8 bits): kind; intValue0(lower bits): set; intValue1: shift
             VulkanBindGlobals,          // intValue0: index; intValue1: set
             VulkanInvertY,              // bool
+            VulkanUseDxPositionW,       // bool
             VulkanUseEntryPointName,    // bool
             VulkanUseGLLayout,          // bool
             VulkanEmitReflection,       // bool