expose VULKAN_EXTERNAL_MEMORY_WIN32 feature

Author: xiaopengli89

wgpu-hal/src/vulkan/adapter.rs

@@ -776,6 +776,11 @@ impl PhysicalDeviceFeatures {
             caps.supports_extension(google::display_timing::NAME),
         );
 
+        features.set(
+            F::VULKAN_EXTERNAL_MEMORY_WIN32,
+            caps.supports_extension(khr::external_memory_win32::NAME),
+        );
+
         (features, dl_flags)
     }
 
@@ -1554,9 +1559,6 @@ impl super::Instance {
                 .is_some_and(|ext| ext.shader_zero_initialize_workgroup_memory == vk::TRUE),
             image_format_list: phd_capabilities.device_api_version >= vk::API_VERSION_1_2
                 || phd_capabilities.supports_extension(khr::image_format_list::NAME),
-            #[cfg(windows)]
-            external_memory_win32: phd_capabilities
-                .supports_extension(khr::external_memory_win32::NAME),
         };
         let capabilities = crate::Capabilities {
             limits: phd_capabilities.to_wgpu_limits(),

wgpu-hal/src/vulkan/device.rs

@@ -786,7 +786,7 @@ impl super::Device {
 
     /// # Safety
     ///
-    /// - Vulkan 1.1+ (or VK_KHR_external_memory)
+    /// - Vulkan (with VK_KHR_external_memory_win32)
     /// - The `d3d11_shared_handle` must be valid and respecting `desc`
     /// - `VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_BIT` flag is used because we need to hold a reference to the handle
     #[cfg(windows)]
@@ -795,8 +795,12 @@ impl super::Device {
         d3d11_shared_handle: windows::Win32::Foundation::HANDLE,
         desc: &crate::TextureDescriptor,
     ) -> Result<super::Texture, crate::DeviceError> {
-        if !self.shared.private_caps.external_memory_win32 {
-            log::error!("VK_KHR_external_memory extension is required");
+        if !self
+            .shared
+            .features
+            .contains(wgt::Features::VULKAN_EXTERNAL_MEMORY_WIN32)
+        {
+            log::error!("Vulkan driver does not support VK_KHR_external_memory_win32");
             return Err(crate::DeviceError::ResourceCreationFailed);
         }
 

wgpu-hal/src/vulkan/mod.rs

@@ -532,8 +532,6 @@ struct PrivateCapabilities {
     robust_image_access2: bool,
     zero_initialize_workgroup_memory: bool,
     image_format_list: bool,
-    #[cfg(windows)]
-    external_memory_win32: bool,
 }
 
 bitflags::bitflags!(

wgpu-types/src/lib.rs

@@ -942,6 +942,16 @@ bitflags::bitflags! {
         /// [VK_GOOGLE_display_timing]: https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_GOOGLE_display_timing.html
         /// [`Surface::as_hal()`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html#method.as_hal
         const VULKAN_GOOGLE_DISPLAY_TIMING = 1 << 62;
+
+        /// Allows using the [VK_KHR_external_memory_win32] Vulkan extension.
+        ///
+        /// Supported platforms:
+        /// - Vulkan (with [VK_KHR_external_memory_win32])
+        ///
+        /// This is a native only feature.
+        ///
+        /// [VK_KHR_external_memory_win32]: https://registry.khronos.org/vulkan/specs/latest/man/html/VK_KHR_external_memory_win32.html
+        const VULKAN_EXTERNAL_MEMORY_WIN32 = 1 << 63;
     }
 }