# Backends in maplibre::render::settings - Rust
Represents the backends that wgpu will use.
Keywords: rust, rustlang, rust-lang, Backends

# Struct maplibre::render::settings::Backends

[−]

    #[repr(transparent)]pub struct Backends {
        pub(crate) bits: u32,
    }

Expand description

Represents the backends that wgpu will use.

## Fields

`bits: u32`

## Implementations

### impl Backends

#### pub const VULKAN: Backends

Supported on Windows, Linux/Android, and macOS/iOS via Vulkan Portability (with the Vulkan feature enabled)

#### pub const GL: Backends

Currently unsupported

#### pub const METAL: Backends

Supported on macOS/iOS

#### pub const DX12: Backends

Supported on Windows 10

#### pub const DX11: Backends

Supported on Windows 7+

#### pub const BROWSER_WEBGPU: Backends

Supported when targeting the web through webassembly

#### pub const PRIMARY: Backends

All the apis that wgpu offers first tier of support for.

Vulkan + Metal + DX12 + Browser WebGPU

#### pub const SECONDARY: Backends

All the apis that wgpu offers second tier of support for. These may be unsupported/still experimental.

OpenGL + DX11

#### pub const fn empty() -> Backends

Returns an empty set of flags.

#### pub const fn all() -> Backends

Returns the set containing all flags.

#### pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

#### pub const fn from_bits(bits: u32) -> Option<Backends>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

#### pub const fn from_bits_truncate(bits: u32) -> Backends

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

#### pub const unsafe fn from_bits_unchecked(bits: u32) -> Backends

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

##### Safety

The caller of the `bitflags!` macro can chose to allow or disallow extra bits for their bitflags type.

The caller of `from_bits_unchecked()` has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

#### pub const fn is_empty(&self) -> bool

Returns `true` if no flags are currently stored.

#### pub const fn is_all(&self) -> bool

Returns `true` if all flags are currently set.

#### pub const fn intersects(&self, other: Backends) -> bool

Returns `true` if there are flags common to both `self` and `other`.

#### pub const fn contains(&self, other: Backends) -> bool

Returns `true` if all of the flags in `other` are contained within `self`.

#### pub fn insert(&mut self, other: Backends)

Inserts the specified flags in-place.

#### pub fn remove(&mut self, other: Backends)

Removes the specified flags in-place.

#### pub fn toggle(&mut self, other: Backends)

Toggles the specified flags in-place.

#### pub fn set(&mut self, other: Backends, value: bool)

Inserts or removes the specified flags depending on the passed value.

#### pub const fn intersection(self, other: Backends) -> Backends

Returns the intersection between the flags in `self` and `other`.

Specifically, the returned set contains only the flags which are present in both `self` and `other`.

This is equivalent to using the `&` operator (e.g. `ops::BitAnd`), as in `flags & other`.

#### pub const fn union(self, other: Backends) -> Backends

Returns the union of between the flags in `self` and `other`.

Specifically, the returned set contains all flags which are present in either `self` or `other`, including any which are present in both (see `Self::symmetric_difference` if that is undesirable).

This is equivalent to using the `|` operator (e.g. `ops::BitOr`), as in `flags | other`.

#### pub const fn difference(self, other: Backends) -> Backends

Returns the difference between the flags in `self` and `other`.

Specifically, the returned set contains all flags present in `self`, except for the ones present in `other`.

It is also conceptually equivalent to the “bit-clear” operation: `flags & !other` (and this syntax is also supported).

This is equivalent to using the `-` operator (e.g. `ops::Sub`), as in `flags - other`.

#### pub const fn symmetric_difference(self, other: Backends) -> Backends

Returns the symmetric difference between the flags in `self` and `other`.

Specifically, the returned set contains the flags present which are present in `self` or `other`, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets `self` and `other`.

This is equivalent to using the `^` operator (e.g. `ops::BitXor`), as in `flags ^ other`.

#### pub const fn complement(self) -> Backends

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in `self`, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between `Self::all()` and `self` (e.g. `Self::all() - self`)

This is equivalent to using the `!` operator (e.g. `ops::Not`), as in `!flags`.

## Trait Implementations

### impl Binary for Backends

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

Formats the value using the given formatter.

### impl BitAnd<Backends> for Backends

#### pub fn bitand(self, other: Backends) -> Backends

Returns the intersection between the two sets of flags.

#### type Output = Backends

The resulting type after applying the `&` operator.

### impl BitAndAssign<Backends> for Backends

#### pub fn bitand_assign(&mut self, other: Backends)

Disables all flags disabled in the set.

### impl BitOr<Backends> for Backends

#### pub fn bitor(self, other: Backends) -> Backends

Returns the union of the two sets of flags.

#### type Output = Backends

The resulting type after applying the `|` operator.

### impl BitOrAssign<Backends> for Backends

#### pub fn bitor_assign(&mut self, other: Backends)

Adds the set of flags.

### impl BitXor<Backends> for Backends

#### pub fn bitxor(self, other: Backends) -> Backends

Returns the left flags, but with all the right flags toggled.

#### type Output = Backends

The resulting type after applying the `^` operator.

### impl BitXorAssign<Backends> for Backends

#### pub fn bitxor_assign(&mut self, other: Backends)

Toggles the set of flags.

### impl Clone for Backends

#### pub fn clone(&self) -> Backends

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from `source`. Read more

### impl Debug for Backends

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

Formats the value using the given formatter. Read more

### impl Extend<Backends> for Backends

#### pub fn extend<T>(&mut self, iterator: T) where
T: IntoIterator<Item = Backends>,

Extends a collection with the contents of an iterator. Read more

source

#### fn extend_one(&mut self, item: A)

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

Extends a collection with exactly one element.

source

#### fn extend_reserve(&mut self, additional: usize)

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

Reserves capacity in a collection for the given number of additional elements. Read more

### impl From<Backend> for Backends

#### pub fn from(backend: Backend) -> Backends

Performs the conversion.

### impl FromIterator<Backends> for Backends

#### pub fn from_iter<T>(iterator: T) -> Backends where
T: IntoIterator<Item = Backends>,

Creates a value from an iterator. Read more

### impl Hash for Backends

#### pub fn hash<__H>(&self, state: &mut __H) where
__H: Hasher,

Feeds this value into the given `Hasher`. Read more

1.3.0 · source

#### fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,

Feeds a slice of this type into the given `Hasher`. Read more

### impl LowerHex for Backends

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

Formats the value using the given formatter.

### impl Not for Backends

#### pub fn not(self) -> Backends

Returns the complement of this set of flags.

#### type Output = Backends

The resulting type after applying the `!` operator.

### impl Octal for Backends

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

Formats the value using the given formatter.

### impl Ord for Backends

#### pub fn cmp(&self, other: &Backends) -> Ordering

This method returns an `Ordering` between `self` and `other`. Read more

1.21.0 · source

#### fn max(self, other: Self) -> Self

Compares and returns the maximum of two values. Read more

1.21.0 · source

#### fn min(self, other: Self) -> Self

Compares and returns the minimum of two values. Read more

1.50.0 · source

#### fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval. Read more

### impl PartialEq<Backends> for Backends

#### pub fn eq(&self, other: &Backends) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### pub fn ne(&self, other: &Backends) -> bool

This method tests for `!=`.

### impl PartialOrd<Backends> for Backends

#### pub fn partial_cmp(&self, other: &Backends) -> Option<Ordering>

This method returns an ordering between `self` and `other` values if one exists. Read more

1.0.0 · source

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

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

1.0.0 · source

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

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

1.0.0 · source

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

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

1.0.0 · source

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

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### impl Sub<Backends> for Backends

#### pub fn sub(self, other: Backends) -> Backends

Returns the set difference of the two sets of flags.

#### type Output = Backends

The resulting type after applying the `-` operator.

### impl SubAssign<Backends> for Backends

#### pub fn sub_assign(&mut self, other: Backends)

Disables all flags enabled in the set.

### impl UpperHex for Backends

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

Formats the value using the given formatter.

### impl Copy for Backends

### impl Eq for Backends

### impl StructuralEq for Backends

### impl StructuralPartialEq for Backends

## Auto Trait Implementations

### impl RefUnwindSafe for Backends

### impl Send for Backends

### impl Sync for Backends

### impl Unpin for Backends

### impl UnwindSafe for Backends

## Blanket Implementations

source

### impl<T> Any for T where
T: 'static + ?Sized,

source

#### pub fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

source

### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

source

### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

#### pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

### impl<T> CallHasher for T where
T: Hash + ?Sized,

#### pub fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64 where
H: Hash + ?Sized,
B: BuildHasher,

### impl<T> Downcast for T where
T: Any,

#### pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert `Box<dyn Trait>` (where `Trait: Downcast`) to `Box<dyn Any>`. `Box<dyn Any>` can then be further `downcast` into `Box<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

#### pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert `Rc<Trait>` (where `Trait: Downcast`) to `Rc<Any>`. `Rc<Any>` can then be further `downcast` into `Rc<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

#### pub fn as_any(&self) -> &(dyn Any + 'static)

Convert `&Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&Any`’s vtable from `&Trait`’s. Read more

#### pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert `&mut Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&mut Any`’s vtable from `&mut Trait`’s. Read more

### impl<T> Downcast<T> for T

#### pub fn downcast(&self) -> &T

### impl<T> DowncastSync for T where
T: Any + Send + Sync,

#### pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync + 'static>

Convert `Arc<Trait>` (where `Trait: Downcast`) to `Arc<Any>`. `Arc<Any>` can then be further `downcast` into `Arc<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

source

### impl<T> DynEq for T where
T: Any + Eq,

source

#### fn as_any(&self) -> &dyn Any

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#### fn dyn_eq(&self, other: &dyn DynEq) -> bool

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### impl<T> DynHash for T where
T: DynEq + Hash,

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#### fn as_dyn_eq(&self) -> &dyn DynEq

source

#### fn dyn_hash(&self, state: &mut dyn Hasher)

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### impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,

source

#### pub fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.

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### impl<T> From<T> for T

const: unstable · source

#### pub fn from(t: T) -> T

Returns the argument unchanged.

source

### impl<T> Instrument for T

source

#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more

source

#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more

source

### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### pub fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

source

### impl<T> Same<T> for T

#### type Output = T

Should always be `Self`

source

### impl<T> ToOwned for T where
T: Clone,

#### type Owned = T

The resulting type after obtaining ownership.

source

#### pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

source

#### pub fn clone_into(&self, target: &mut T)

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

Uses borrowed data to replace owned data, usually by cloning. Read more

source

### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

source

### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

### impl<T> Upcast<T> for T

#### pub fn upcast(&self) -> Option<&T>

source

### impl<T> WithSubscriber for T

source

#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more

source

#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more