[PATCH 6/6] win32u: Implement Vulkan memory D3DKMT handle import from name.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/win32u/vulkan.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/vulkan.c b/dlls/win32u/vulkan.c
index 4ed9ad0dbf2..9e8762f92f9 100644
--- a/dlls/win32u/vulkan.c
+++ b/dlls/win32u/vulkan.c
@@ -212,6 +212,35 @@ static HANDLE create_shared_handle( D3DKMT_HANDLE local, const VkExportMemoryWin
     return NULL;
 }

+static HANDLE open_shared_handle_from_name( const WCHAR *name )
+{
+    D3DKMT_OPENNTHANDLEFROMNAME open_name = {0};
+    UINT size = wcslen( name ) * sizeof(WCHAR);
+    UNICODE_STRING name_str;
+    OBJECT_ATTRIBUTES attr;
+    WCHAR bufferW[MAX_PATH];
+    char buffer[MAX_PATH];
+    NTSTATUS status;
+
+    snprintf( buffer, ARRAY_SIZE(buffer), "\Sessions\%u\BaseNamedObjects\",
+              NtCurrentTeb()->Peb->SessionId );
+    name_str.MaximumLength = asciiz_to_unicode( bufferW, buffer );
+    name_str.Length = name_str.MaximumLength - sizeof(WCHAR);
+
+    memcpy( name_str.Buffer + name_str.Length / sizeof(WCHAR), name, size * sizeof(WCHAR) );
+    name_str.MaximumLength += size * sizeof(WCHAR);
+    name_str.Length = size * sizeof(WCHAR);
+
+    init_unicode_string( &name_str, name );
+    InitializeObjectAttributes( &attr, &name_str, OBJ_OPENIF, NULL, NULL );
+
+    open_name.dwDesiredAccess = GENERIC_ALL;
+    open_name.pObjAttrib = &attr;
+    if ((status = NtGdiDdDDIOpenNtHandleFromName( &open_name )))
+        WARN( "Failed to open shared handle name %s, status %#x\n", debugstr_w( name ), status );
+    return open_name.hNtHandle;
+}
+
 static VkResult win32u_vkAllocateMemory( VkDevice client_device, const VkMemoryAllocateInfo *client_alloc_info,
                                          const VkAllocationCallbacks *allocator, VkDeviceMemory *ret )
 {
@@ -288,8 +317,13 @@ static VkResult win32u_vkAllocateMemory( VkDevice client_device, const VkMemoryA
         case VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_BIT:
         case VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D12_HEAP_BIT:
         case VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D12_RESOURCE_BIT:
-            memory->local = d3dkmt_open_resource( 0, import_win32->handle );
+        {
+            HANDLE shared = import_win32->handle;
+            if (import_win32->name && !(shared = open_shared_handle_from_name( import_win32->name ))) break;
+            memory->local = d3dkmt_open_resource( 0, shared );
+            if (shared && shared != import_win32->handle) NtClose( shared );
             break;
+        }
         default:
             FIXME( "Unsupported handle type %#x\n", import_win32->handleType );
             break;