Some small fixes with Windows/DX usage (#2797)

* Correct case of windows.h includes

* Use Slang::SharedLibrary to load directx dlls

* s/max/std::max/

* Factor common OS code in calcHasApi

* Add DXIL test for compute/simple

* s/false/FALSE for calls to WinAPI functions

* Factor common OS code in gfxGetAdapters

* 2 missing headers

d3d12sdklayers for ID3DDebug

climits for UINT_MAX

* Define out unused function on Linux

* Only try to load Vulkan and CUDA on Windows or Linux

* simplify D3DUtil::getDxgiModule

* Remove WIN32_LEAN_AND_MEAN &co from source files

Add a global define

* Set WIN32_LEAN_AND_MEAN &friends in headers

Restore previous state also

* regenerate vs projects

1 files changed, 4 insertions, 12 deletions

diff --git a/tools/gfx/render.cpp b/tools/gfx/render.cpp
index 048eb8224..2f10fa67c 100644
--- a/tools/gfx/render.cpp
+++ b/tools/gfx/render.cpp
@@ -256,13 +256,9 @@ extern "C"
             break;
         case DeviceType::OpenGl:
             return SLANG_E_NOT_IMPLEMENTED;
-        case DeviceType::Vulkan:
-            SLANG_RETURN_ON_FAIL(getVKAdapters(adapters));
-            break;
-        case DeviceType::CUDA:
-            SLANG_RETURN_ON_FAIL(getCUDAAdapters(adapters));
-            break;
-#elif SLANG_LINUX_FAMILY && !defined(__CYGWIN__)
+#endif
+#if SLANG_WINDOWS_FAMILY || SLANG_LINUX_FAMILY
+        // Assume no Vulkan or CUDA on MacOS or Cygwin
         case DeviceType::Vulkan:
             SLANG_RETURN_ON_FAIL(getVKAdapters(adapters));
             break;
@@ -304,10 +300,6 @@ extern "C"
             {
                 return createVKDevice(desc, outDevice);
             }
-        case DeviceType::CUDA:
-            {
-                return createCUDADevice(desc, outDevice);
-            }
         case DeviceType::Default:
             {
                 IDevice::Desc newDesc = *desc;
@@ -332,11 +324,11 @@ extern "C"
         {
             return createVKDevice(desc, outDevice);
         }
+#endif
         case DeviceType::CUDA:
         {
             return createCUDADevice(desc, outDevice);
         }
-#endif
         case DeviceType::CPU:
             {
                 return createCPUDevice(desc, outDevice);