Vulkan update/NVAPI support (#1511)

* First pass at incorporating nvapi into test harness.

* D3d12 Atomic Float Add via NVAPI working

* Dx12 atomic float appears to work.

* Atomic float add on Dx12.

* Added atomic64 feature addition to vk.
Fix correct output for atomic-float-byte-address.slang

* Disable atomic float failing tests.

* Upgraded VK headers.

* Detect atomic float availability on VK.

* Try to get test working for in64 atomic.

* Made HLSL prelude controlled via the render-test requirements.

* Added -enable-nvapi to premake.

* Fix D3D12Renderer when NVAPI is not available.

* Small improvements to VKRenderer.

* Improve atomic documentation in target-compatibility.md.

1 files changed, 14 insertions, 8 deletions

diff --git a/source/core/slang-test-tool-util.h b/source/core/slang-test-tool-util.h
index 9aa34bd0e..07532682b 100644
--- a/source/core/slang-test-tool-util.h
+++ b/source/core/slang-test-tool-util.h
@@ -36,12 +36,6 @@ enum class ToolReturnCodeSpan
 /* Utility functions for 'test tools' */
 struct TestToolUtil
 {
-    struct PreludeInfo
-    {
-        const char* exePath = nullptr;
-        const char* nvapiPath = nullptr;
-    };
-
     typedef SlangResult(*InnerMainFunc)(Slang::StdWriters* stdWriters, SlangSession* session, int argc, const char*const* argv);
 
         /// If the test failed to run or was ignored then we are done
@@ -53,10 +47,22 @@ struct TestToolUtil
         /// Given a slang result, returns a return code that can be returned from an executable
     static ToolReturnCode getReturnCode(SlangResult res);
 
+        /// Given the executable path (as located in Slang directory hierarchy), works out the absolute path to the root 
+    static SlangResult getRootPath(const char* exePath, String& outRootPath);
+
+        /// Given the exePath, give return the absolute path to the directory the exe is in
+    static SlangResult getExeDirectoryPath(const char* exePath, String& outExeDirectoryPath);
+
         /// Sets the default preludes on the session based on the executable path
-    static SlangResult setSessionDefaultPrelude(const PreludeInfo& preludeInfo, slang::IGlobalSession* session);
+    static SlangResult setSessionDefaultPreludeFromRootPath(const String& rootPath, slang::IGlobalSession* session);
 
-    static SlangResult setSessionDefaultPrelude(const char* exePath, slang::IGlobalSession* session);
+        /// Calculates the path that is the combination of parentPath, and relPath
+        /// And converts such that can be used as an include path (handling slashes)
+    static SlangResult getIncludePath(const String& parentPath, const char* relPath, String& outIncludePath);
+
+    
+        /// Sets the default preludes on the session based on the executable path
+    static SlangResult setSessionDefaultPreludeFromExePath(const char* exePath, slang::IGlobalSession* session);
 };
 
 } // namespace Slang