Struct ScaleFactor 

pub struct ScaleFactor(/* private fields */);

The ratio of physical device pixels to logical pixels for a surface (e.g. 2.0 on a typical HiDPI “retina” display, 1.0 on a standard display). Always strictly positive.

Implementations

impl ScaleFactor

pub const IDENTITY: Self

The identity scale (1 physical pixel per logical pixel).

pub fn new(factor: f64) -> Self

Creates a scale factor, clamping non-finite or non-positive input to ScaleFactor::IDENTITY.

pub fn get(self) -> f64

pub fn to_physical(self, logical: Size) -> PhysicalSize

Convert a logical size to physical pixels, rounding to whole pixels.

pub fn to_logical(self, physical: PhysicalSize) -> Size

Convert a physical size back to logical pixels.

Trait Implementations

impl Clone for ScaleFactor

fn clone(&self) -> ScaleFactor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScaleFactor

impl Debug for ScaleFactor

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

Formats the value using the given formatter.

impl Default for ScaleFactor

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ScaleFactor

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ScaleFactor