First pass support for half on vk (#912)

* Look at getting half to work on vk.

* Alter half test so can always produce consistent test results.

* First pass working half on vk.

* Improve comments for vulkan extensions around half.

* Upgraded vulkan headers to v1.1.103

https://github.com/KhronosGroup/Vulkan-Headers

* * Add getFeatures on Render interface
* Vulkan renderer determines at startup if it can support half
* Parse render-features on render-test

* Small changes to half-calc.slang test.

* Structured buffer half access works as expected for Vk, but isn't for dx12, so disable for now.

* Require the half feature for renderers for the half-structured-buffer.slang test.

* * Added ToolReturnCode to be more rigerous about how a return code is passed back from a tool
* Added support for a tool being able to pass back an 'ignored' result.
* Used enum codes to indicate meanings
* Made spawnAndWait return a ToolReturnCode

* Ignore tests that don't have required render-feature

* Fix macro line continuation usage.

* Check dx12 has half support.

* Checking for half on dx12 - if CheckFeatureSupport fails, don't fail renderer initialization.

* Fix typo.

3 files changed, 34 insertions, 0 deletions

diff --git a/tools/render-test/options.cpp b/tools/render-test/options.cpp
index b6208c4b3..1171a2a03 100644
--- a/tools/render-test/options.cpp
+++ b/tools/render-test/options.cpp
@@ -9,7 +9,11 @@
 #include "../../source/core/slang-writer.h"
 #include "../../source/core/slang-render-api-util.h"
 
+#include "../../source/core/list.h"
+#include "../../source/core/slang-string-util.h"
+
 namespace renderer_test {
+using namespace Slang;
 
 static const Options gDefaultOptions;
 
@@ -98,6 +102,23 @@ SlangResult parseOptions(int argc, const char*const* argv, Slang::WriterHelper s
             }
             gOptions.profileName = *argCursor++;
         }
+        else if (strcmp(arg, "-render-features") == 0 || strcmp(arg, "-render-feature") == 0)
+        {
+            if (argCursor == argEnd)
+            {
+                stdError.print("expected argument for '%s' option\n", arg);
+                return SLANG_FAIL;
+            }
+            const char* value = *argCursor++;
+
+            List<UnownedStringSlice> values;
+            StringUtil::split(UnownedStringSlice(value), ',', values);
+
+            for (const auto& value : values)
+            {
+                gOptions.renderFeatures.Add(value);
+            }
+        }
         else if( strcmp(arg, "-xslang") == 0 )
         {
             // This is an option that we want to pass along to Slang
diff --git a/tools/render-test/options.h b/tools/render-test/options.h
index 6c1482ab4..7b55b9ac0 100644
--- a/tools/render-test/options.h
+++ b/tools/render-test/options.h
@@ -55,6 +55,8 @@ struct Options
     int slangArgCount = 0;
 
     bool useDXIL = false;
+
+    Slang::List<Slang::String> renderFeatures;          /// Required render features for this test to run
 };
 
 extern Options gOptions;
diff --git a/tools/render-test/render-test-main.cpp b/tools/render-test/render-test-main.cpp
index 0be84f52f..ee408f283 100644
--- a/tools/render-test/render-test-main.cpp
+++ b/tools/render-test/render-test-main.cpp
@@ -574,6 +574,17 @@ SLANG_TEST_TOOL_API SlangResult innerMain(Slang::StdWriters* stdWriters, SlangSe
         }
     }
 
+    {
+        for (const auto& feature : gOptions.renderFeatures)
+        {
+            // If doesn't have required feature... we have to give up
+            if (!renderer->hasFeature(feature.getUnownedSlice()))
+            {
+                return SLANG_E_NOT_AVAILABLE;
+            }
+        }
+    }
+
     // Use the profile name set on options if set
     profileName = gOptions.profileName ? gOptions.profileName : profileName;