Improve Vulkan shader-objects implementation. (#1765)

* Improve Vulkan shader-objects implementation.

1. Null bindings no longer crashes.
2. No longer copies push constants to staging CPU buffer before setting it into command buffer. The entry-point shader object now directly sets it into command buffer upon `bindObject` call.

* Update comments

* Fix

* Re-enable 3 tests.

Improved vulkan implementation so that each shader object is responsible for creating descriptor sets on-demand.

Fixed slang reflection to correctly report `ParameterBlock` binding.

* Fix gcc compile error.

3 files changed, 0 insertions, 3 deletions

diff --git a/examples/hello-world/main.cpp b/examples/hello-world/main.cpp
index 023c16304..b3bee9c07 100644
--- a/examples/hello-world/main.cpp
+++ b/examples/hello-world/main.cpp
@@ -244,7 +244,6 @@ Slang::Result initialize()
     // platforms/APIs.
     //
     IDevice::Desc deviceDesc = {};
-    deviceDesc.deviceType = DeviceType::Vulkan;
     gfx::Result res = gfxCreateDevice(&deviceDesc, gDevice.writeRef());
     if(SLANG_FAILED(res)) return res;
 
diff --git a/examples/shader-object/main.cpp b/examples/shader-object/main.cpp
index 4945de27b..aaafc010a 100644
--- a/examples/shader-object/main.cpp
+++ b/examples/shader-object/main.cpp
@@ -136,7 +136,6 @@ int main()
     // interacting with the graphics API.
     Slang::ComPtr<gfx::IDevice> device;
     IDevice::Desc deviceDesc = {};
-    deviceDesc.deviceType = DeviceType::Vulkan;
     SLANG_RETURN_ON_FAIL(gfxCreateDevice(&deviceDesc, device.writeRef()));
 
     // Now we can load the shader code.
diff --git a/examples/shader-toy/main.cpp b/examples/shader-toy/main.cpp
index 8e377b42f..c4424b294 100644
--- a/examples/shader-toy/main.cpp
+++ b/examples/shader-toy/main.cpp
@@ -315,7 +315,6 @@ Result initialize()
     gWindow->events.sizeChanged = Slang::Action<>(this, &ShaderToyApp::windowSizeChanged);
 
     IDevice::Desc deviceDesc;
-    deviceDesc.deviceType = DeviceType::Vulkan;
     Result res = gfxCreateDevice(&deviceDesc, gDevice.writeRef());
     if(SLANG_FAILED(res)) return res;