[PATCH 2/2] win32u: Use VK_EXT_headless_surface for nulldrv surface.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/win32u/vulkan.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/dlls/win32u/vulkan.c b/dlls/win32u/vulkan.c
index 6d8a5ef1b29..e755ef1c7b7 100644
--- a/dlls/win32u/vulkan.c
+++ b/dlls/win32u/vulkan.c
@@ -509,10 +509,12 @@ static struct vulkan_funcs vulkan_funcs =
     .p_get_host_surface_extension = win32u_get_host_surface_extension,
 };

+static PFN_vkCreateHeadlessSurfaceEXT p_vkCreateHeadlessSurfaceEXT;
+
 static VkResult nulldrv_vulkan_surface_create( HWND hwnd, VkInstance instance, VkSurfaceKHR *surface, void **private )
 {
-    FIXME( "stub!\n" );
-    return VK_ERROR_INCOMPATIBLE_DRIVER;
+    VkHeadlessSurfaceCreateInfoEXT create_info = {.sType = VK_STRUCTURE_TYPE_HEADLESS_SURFACE_CREATE_INFO_EXT};
+    return p_vkCreateHeadlessSurfaceEXT( instance, &create_info, NULL, surface );
 }

static void nulldrv_vulkan_surface_destroy( HWND hwnd, void *private )
@@ -538,7 +540,7 @@ static VkBool32 nulldrv_vkGetPhysicalDeviceWin32PresentationSupportKHR( VkPhysic

static const char *nulldrv_get_host_surface_extension(void)
 {
-    return "VK_WINE_nulldrv_surface";
+    return "VK_EXT_headless_surface";
 }

static const struct vulkan_driver_funcs nulldrv_funcs =
@@ -563,8 +565,14 @@ static void vulkan_driver_init(void)
         return;
     }

-    if (status == STATUS_NOT_IMPLEMENTED) driver_funcs = &nulldrv_funcs;
-    else vulkan_funcs.p_get_host_surface_extension = driver_funcs->p_get_host_surface_extension;
+    if (!status) vulkan_funcs.p_get_host_surface_extension = driver_funcs->p_get_host_surface_extension;
+    else
+    {
+#define LOAD_FUNCPTR( f ) if (!(p_##f = dlsym( vulkan_handle, #f ))) ERR( #f " not found!\n" );
+        LOAD_FUNCPTR( vkCreateHeadlessSurfaceEXT );
+#undef LOAD_FUNCPTR
+        driver_funcs = &nulldrv_funcs;
+    }
 }

static void vulkan_driver_load(void)