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.

1 files changed, 7 insertions, 0 deletions

diff --git a/tools/gfx/vk-api.h b/tools/gfx/vk-api.h
index 5ec28ef6e..001f44d19 100644
--- a/tools/gfx/vk-api.h
+++ b/tools/gfx/vk-api.h
@@ -10,6 +10,11 @@ namespace gfx {
     x(vkCreateInstance) \
     /* */
 
+#define VK_API_INSTANCE_PROCS_OPT(x) \
+    x(vkGetPhysicalDeviceFeatures2) \
+    x(vkGetPhysicalDeviceProperties2) \
+    /* */
+
 #define VK_API_INSTANCE_PROCS(x) \
     x(vkCreateDevice) \
     x(vkCreateDebugReportCallbackEXT) \
@@ -146,6 +151,8 @@ namespace gfx {
     VK_API_ALL_GLOBAL_PROCS(x) \
     VK_API_ALL_INSTANCE_PROCS(x) \
     VK_API_ALL_DEVICE_PROCS(x) \
+    \
+    VK_API_INSTANCE_PROCS_OPT(x) \
     /* */
 
 #define VK_API_DECLARE_PROC(NAME) PFN_##NAME NAME = nullptr;