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//! See what can go wrong when creating graphical backends.
/// An error that occurred while creating an application's graphical context.
#[derive(Debug, Clone, PartialEq, Eq, thiserror::Error)]
pub enum Error {
/// The requested backend version is not supported.
#[error("the requested backend version is not supported")]
VersionNotSupported,
/// Failed to find any pixel format that matches the criteria.
#[error("failed to find any pixel format that matches the criteria")]
NoAvailablePixelFormat,
/// A suitable graphics adapter or device could not be found.
#[error("a suitable graphics adapter or device could not be found")]
GraphicsAdapterNotFound {
/// The name of the backend where the error happened
backend: &'static str,
/// The reason why this backend could not be used
reason: Reason,
},
/// An error occurred in the context's internal backend
#[error("an error occurred in the context's internal backend")]
BackendError(String),
/// Multiple errors occurred
#[error("multiple errors occurred: {0:?}")]
List(Vec<Self>),
}
/// The reason why a graphics adapter could not be found
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Reason {
/// The backend did not match the preference
DidNotMatch {
/// The preferred backend
preferred_backend: String,
},
/// The request to create the backend failed
RequestFailed(String),
}
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