Struct Density 

pub struct Density {
    pub scale: f32,
    pub font_scale: f32,
}

The device pixel grid a Dp or Sp value is measured against: how many device pixels one Dp is worth, and how far the platform’s text- size setting scales an Sp beyond that.

This is the pure-data half of Compose’s Density. The composition-aware wrapper that reads the ambient grid from a running app and reacts to CompositionLocalProvider-style overrides lives above this crate (cranpose-ui’s Density, which cannot live here without an upward dependency on cranpose-ui) and converts into this type at the boundary.

Fields

scale: f32

Device pixels per Dp.

font_scale: f32

The user’s text-size setting, applied on top of scale for Sp.

Implementations

impl Density

pub const IDENTITY: Self

One layout point per device pixel, no extra text scaling – the grid a test or a golden reaches for when the host’s real grid does not matter to what it is checking.

pub fn new(scale: f32, font_scale: f32) -> Self

pub fn from_scale(scale: f32) -> Self

A grid whose text does not follow a separate font-scale setting – what a caller converting a length rather than a text size reaches for, since a length must not move when the user’s text size does.

Trait Implementations

impl Clone for Density

fn clone(&self) -> Density

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Density

impl Debug for Density

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

Formats the value using the given formatter.

impl Default for Density

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Density

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Density