Enum gfx_core::memory::Usage

#[repr(u8)]
pub enum Usage {
    GpuOnly,
    Immutable,
    Dynamic,
    Persistent(Access),
    CpuOnly(Access),
}

A hint as to how this memory will be used.

The nature of these hints make them very implementation specific. Different drivers on different hardware will handle them differently. Only careful profiling will tell which is the best to use.

Variants

GpuOnly

GPU: read + write, CPU: copy. Optimal for render targets.

Immutable

GPU: read, CPU: none. Optimal for resourced memory.

Dynamic

GPU: read, CPU: write.

Persistent(Access)

GPU: read + write, CPU: as specified.

CpuOnly(Access)

GPU: copy, CPU: as specified. Used for staged memory, to be copied back and forth with on-GPU targets.

Trait Implementations

impl Eq for Usage

impl Ord for Usage

fn cmp(&self, __arg_0: &Usage) -> Ordering

This method returns an Ordering between self and other.

impl PartialEq for Usage

fn eq(&self, __arg_0: &Usage) -> bool

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

fn ne(&self, __arg_0: &Usage) -> bool

This method tests for !=.

impl PartialOrd for Usage

fn partial_cmp(&self, __arg_0: &Usage) -> Option<Ordering>

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

fn lt(&self, __arg_0: &Usage) -> bool

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

fn le(&self, __arg_0: &Usage) -> bool

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

fn gt(&self, __arg_0: &Usage) -> bool

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

fn ge(&self, __arg_0: &Usage) -> bool

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

impl Hash for Usage

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the state given, updating the hasher as necessary.

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

Feeds a slice of this type into the state provided.

impl Copy for Usage

impl Clone for Usage

fn clone(&self) -> Usage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Usage

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.