Enum Error 

pub enum Error {
    NoAdapter,
    Device(RequestDeviceError),
    Map(BufferAsyncError),
    Poll(PollError),
    Read(MapRangeError),
}

What can go wrong between asking for a GPU and reading pixels back.

Variants

NoAdapter

wgpu found no adapter at all. Headless CI runners without a software Vulkan are the usual reason.

Device(RequestDeviceError)

The adapter refused to hand out a device.

Map(BufferAsyncError)

Mapping the readback buffer failed.

Poll(PollError)

The device did not finish the work it was asked to wait for.

Read(MapRangeError)

The readback buffer could not be read once mapped.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<BufferAsyncError> for Error

fn from(source: BufferAsyncError) -> Self

Converts to this type from the input type.

impl From<MapRangeError> for Error

fn from(source: MapRangeError) -> Self

Converts to this type from the input type.

impl From<PollError> for Error

fn from(source: PollError) -> Self

Converts to this type from the input type.

impl From<RequestDeviceError> for Error

fn from(source: RequestDeviceError) -> Self

Converts to this type from the input type.