Struct vk_mem::AllocationCreateFlags

pub struct AllocationCreateFlags { /* fields omitted */ }

Flags for configuring Allocation construction.

Methods

impl AllocationCreateFlags

pub const NONE: AllocationCreateFlags

Default configuration for allocation.

pub const DEDICATED_MEMORY: AllocationCreateFlags

Set this flag if the allocation should have its own memory block.

Use it for special, big resources, like fullscreen images used as attachments.

You should not use this flag if AllocationCreateInfo::pool is not None.

pub const NEVER_ALLOCATE: AllocationCreateFlags

Set this flag to only try to allocate from existing ash::vk::DeviceMemory blocks and never create new such block.

If new allocation cannot be placed in any of the existing blocks, allocation fails with ash::vk::Result::ERROR_OUT_OF_DEVICE_MEMORY error.

You should not use AllocationCreateFlags::DEDICATED_MEMORY and AllocationCreateFlags::NEVER_ALLOCATE at the same time. It makes no sense.

If AllocationCreateInfo::pool is not None, this flag is implied and ignored.

pub const MAPPED: AllocationCreateFlags

Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.

Pointer to mapped memory will be returned through Allocation::get_mapped_data().

Is it valid to use this flag for allocation made from memory type that is not ash::vk::MemoryPropertyFlags::HOST_VISIBLE. This flag is then ignored and memory is not mapped. This is useful if you need an allocation that is efficient to use on GPU (ash::vk::MemoryPropertyFlags::DEVICE_LOCAL) and still want to map it directly if possible on platforms that support it (e.g. Intel GPU).

You should not use this flag together with AllocationCreateFlags::CAN_BECOME_LOST.

pub const CAN_BECOME_LOST: AllocationCreateFlags

Allocation created with this flag can become lost as a result of another allocation with AllocationCreateFlags::CAN_MAKE_OTHER_LOST flag, so you must check it before use.

To check if allocation is not lost, call Allocator::get_allocation_info and check if AllocationInfo::device_memory is not null.

You should not use this flag together with AllocationCreateFlags::MAPPED.

pub const CAN_MAKE_OTHER_LOST: AllocationCreateFlags

While creating allocation using this flag, other allocations that were created with flag AllocationCreateFlags::CAN_BECOME_LOST can become lost.

pub const USER_DATA_COPY_STRING: AllocationCreateFlags

Set this flag to treat AllocationCreateInfo::user_data as pointer to a null-terminated string. Instead of copying pointer value, a local copy of the string is made and stored in allocation's user data. The string is automatically freed together with the allocation. It is also used in Allocator::build_stats_string.

pub const UPPER_ADDRESS: AllocationCreateFlags

Allocation will be created from upper stack in a double stack pool.

This flag is only allowed for custom pools created with AllocatorPoolCreateFlags::LINEAR_ALGORITHM flag.

pub const CREATE_DONT_BIND: AllocationCreateFlags

Create both buffer/image and allocation, but don't bind them together. It is useful when you want to bind yourself to do some more advanced binding, e.g. using some extensions. The flag is meaningful only with functions that bind by default, such as Allocator::create_buffer or Allocator::create_image. Otherwise it is ignored.

pub const STRATEGY_BEST_FIT: AllocationCreateFlags

Allocation strategy that chooses smallest possible free range for the allocation.

pub const STRATEGY_WORST_FIT: AllocationCreateFlags

Allocation strategy that chooses biggest possible free range for the allocation.

pub const STRATEGY_FIRST_FIT: AllocationCreateFlags

Allocation strategy that chooses first suitable free range for the allocation.

"First" doesn't necessarily means the one with smallest offset in memory, but rather the one that is easiest and fastest to find.

pub const STRATEGY_MIN_MEMORY: AllocationCreateFlags

Allocation strategy that tries to minimize memory usage.

pub const STRATEGY_MIN_TIME: AllocationCreateFlags

Allocation strategy that tries to minimize allocation time.

pub const STRATEGY_MIN_FRAGMENTATION: AllocationCreateFlags

Allocation strategy that tries to minimize memory fragmentation.

pub const STRATEGY_MASK: AllocationCreateFlags

A bit mask to extract only *_STRATEGY bits from entire set of flags.

pub const fn empty() -> AllocationCreateFlags

Returns an empty set of flags

pub const fn all() -> AllocationCreateFlags

Returns the set containing all flags.

pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

pub fn from_bits(bits: u32) -> Option<AllocationCreateFlags>

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) -> AllocationCreateFlags

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

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: AllocationCreateFlags) -> bool

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

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

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

pub fn insert(&mut self, other: AllocationCreateFlags)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: AllocationCreateFlags)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: AllocationCreateFlags)

Toggles the specified flags in-place.

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

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

Trait Implementations

impl PartialEq<AllocationCreateFlags> for AllocationCreateFlags

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

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

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

This method tests for !=.

impl Clone for AllocationCreateFlags

fn clone(&self) -> AllocationCreateFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Extend<AllocationCreateFlags> for AllocationCreateFlags

fn extend<T: IntoIterator<Item = AllocationCreateFlags>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

impl PartialOrd<AllocationCreateFlags> for AllocationCreateFlags

fn partial_cmp(&self, other: &AllocationCreateFlags) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl Eq for AllocationCreateFlags

impl Ord for AllocationCreateFlags

fn cmp(&self, other: &AllocationCreateFlags) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

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

Restrict a value to a certain interval.

impl Copy for AllocationCreateFlags

impl Debug for AllocationCreateFlags

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

Formats the value using the given formatter.

impl Sub<AllocationCreateFlags> for AllocationCreateFlags

type Output = AllocationCreateFlags

The resulting type after applying the - operator.

fn sub(self, other: AllocationCreateFlags) -> AllocationCreateFlags

Returns the set difference of the two sets of flags.

impl SubAssign<AllocationCreateFlags> for AllocationCreateFlags

fn sub_assign(&mut self, other: AllocationCreateFlags)

Disables all flags enabled in the set.

impl Not for AllocationCreateFlags

type Output = AllocationCreateFlags

The resulting type after applying the ! operator.

fn not(self) -> AllocationCreateFlags

Returns the complement of this set of flags.

impl BitAnd<AllocationCreateFlags> for AllocationCreateFlags

type Output = AllocationCreateFlags

The resulting type after applying the & operator.

fn bitand(self, other: AllocationCreateFlags) -> AllocationCreateFlags

Returns the intersection between the two sets of flags.

impl BitOr<AllocationCreateFlags> for AllocationCreateFlags

type Output = AllocationCreateFlags

The resulting type after applying the | operator.

fn bitor(self, other: AllocationCreateFlags) -> AllocationCreateFlags

Returns the union of the two sets of flags.

impl BitXor<AllocationCreateFlags> for AllocationCreateFlags

type Output = AllocationCreateFlags

The resulting type after applying the ^ operator.

fn bitxor(self, other: AllocationCreateFlags) -> AllocationCreateFlags

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

impl BitAndAssign<AllocationCreateFlags> for AllocationCreateFlags

fn bitand_assign(&mut self, other: AllocationCreateFlags)

Disables all flags disabled in the set.

impl BitOrAssign<AllocationCreateFlags> for AllocationCreateFlags

fn bitor_assign(&mut self, other: AllocationCreateFlags)

Adds the set of flags.

impl BitXorAssign<AllocationCreateFlags> for AllocationCreateFlags

fn bitxor_assign(&mut self, other: AllocationCreateFlags)

Toggles the set of flags.

impl Hash for AllocationCreateFlags

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl FromIterator<AllocationCreateFlags> for AllocationCreateFlags

fn from_iter<T: IntoIterator<Item = AllocationCreateFlags>>(
    iterator: T
) -> AllocationCreateFlags

Creates a value from an iterator.

impl Octal for AllocationCreateFlags

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

Formats the value using the given formatter.

impl Binary for AllocationCreateFlags

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

Formats the value using the given formatter.

impl LowerHex for AllocationCreateFlags

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

Formats the value using the given formatter.

impl UpperHex for AllocationCreateFlags

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

Formats the value using the given formatter.