Enum surfman::SurfaceAccess

pub enum SurfaceAccess {
    GPUOnly,
    GPUCPU,
    GPUCPUWriteCombined,
}

Variants

GPUOnly

The surface data is accessible by the GPU only.

The lock_surface_data() method will return the SurfaceDataInaccessible error when called on this surface.

GPUCPU

The surface data is accessible by the GPU and CPU.

GPUCPUWriteCombined

The surface data is accessible by the GPU and CPU, and the CPU will send surface data over the bus to the GPU using write-combining if available.

Specifically, what this means is that data transfer will be optimized for the following patterns:

1. Writing, not reading.

2. Writing sequentially, filling every byte in a range.

This flag has no effect on correctness (at least on x86), but not following the rules above may result in severe performance consequences.

The driver is free to treat this as identical to GPUCPU.

Trait Implementations

impl Clone for SurfaceAccess

fn clone(&self) -> SurfaceAccess

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for SurfaceAccess

impl PartialEq<SurfaceAccess> for SurfaceAccess

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

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

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Debug for SurfaceAccess

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

Formats the value using the given formatter.

impl StructuralPartialEq for SurfaceAccess