Enum UnsupportedReason 

#[non_exhaustive]
pub enum UnsupportedReason {
    PlatformNotImplemented,
    HostBackendUnavailable,
    HostBackendMismatch,
    NativeImportNotYetImplemented,
    VulkanDisjointDmabufNotSupported,
    VulkanDmabufExtensionNotEnabled,
    VulkanForeignQueueExtensionNotEnabled,
}

Why a particular interop path is not available.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PlatformNotImplemented

The platform code path exists but has not been implemented yet.

HostBackendUnavailable

No wgpu backend could be detected on the host device.

HostBackendMismatch

The frame type requires a different wgpu backend than the host is using (e.g. VulkanExternalImage on a Metal device).

NativeImportNotYetImplemented

A native frame variant (e.g. VulkanExternalImage) is defined in the API but the corresponding import logic is not yet implemented.

VulkanDisjointDmabufNotSupported

The DMABUF planes refer to independent kernel allocations. Graft currently supports shared-fd multi-plane layouts; disjoint allocations require Vulkan disjoint image binding and are rejected explicitly.

VulkanDmabufExtensionNotEnabled

The wgpu Vulkan device was not constructed with the base DMABUF extension set enabled, including VK_EXT_image_drm_format_modifier, so external image creation would fail. On Linux, use vulkan_dmabuf::create_dmabuf_host_context to obtain a device with the required extensions.

VulkanForeignQueueExtensionNotEnabled

The imported image belongs to a non-Vulkan producer, but the host device lacks VK_EXT_queue_family_foreign. On Linux, construct the unified wgpu device with vulkan_dmabuf::create_dmabuf_host_context.

Trait Implementations

impl Clone for UnsupportedReason

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UnsupportedReason

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for UnsupportedReason

impl PartialEq for UnsupportedReason

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for UnsupportedReason