Struct Instance 

pub struct Instance { /* private fields */ }

the GPU API of the system (Vulkan); create adapters and surfaces from it

Implementations

impl Instance

pub fn new() -> Result<Instance>

the system’s GPU API with the default settings

pub fn with(desc: &InstanceDesc<'_>) -> Result<Instance>

pub fn validating(&self) -> bool

the validation layer is active on this instance

pub fn adapters(&self) -> Result<Vec<Adapter>>

every GPU of the system, discrete ones first (AdapterInfo::missing: unusable ones)

pub fn prepare(&self) -> Result<bool>

(the browser: adapter and device come asynchronously; here they are there)

pub fn adapter(&self) -> Result<Adapter>

the adapter to use: jfgui_GPU_ADAPTER (index or name part), else the first usable one

pub fn adapters_low_power( &self, display: Option<(u32, u32)>, ) -> Result<Vec<Adapter>>

the adapters for showing windows without waking more hardware than needed, the most frugal first: only integrated and discrete GPUs (a CPU or virtual adapter is no gain over the CPU path), the one that drives the display (vendor id, device id) before the others, integrated before discrete. jfgui_GPU_ADAPTER picks one as in adapter(). Programs that want a GPU for themselves keep adapter().

Trait Implementations

impl Clone for Instance

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.