Enum Backend 

#[non_exhaustive]
pub enum Backend {
    Auto,
    Vulkan,
    Metal,
    Dx12,
    Gl,
}

The graphics API a window draws with. The WGPU_BACKEND environment variable (vulkan, dx12, metal, gl, comma-separated) overrides it, to try another without rebuilding. When the chosen API gives no device, the window tries every API before run fails.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Auto

Whichever API the system offers best: Vulkan, Metal or DirectX 12, and OpenGL where none of those is there.

Vulkan

Vulkan, on Linux and Windows.

Metal

Metal, on macOS.

Dx12

DirectX 12, on Windows.

Gl

OpenGL, or OpenGL ES. On some drivers it takes much less memory than Vulkan or DirectX 12 for an interface that draws little: measure on the machines you target.

Trait Implementations

impl Clone for Backend

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Backend

impl Debug for Backend

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

Formats the value using the given formatter.

impl Default for Backend

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Backend

impl PartialEq for Backend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Backend