Struct Viewport 

pub struct Viewport { /* private fields */ }

The rendering viewport — physical dimensions and DPI scale factor.

Physical pixels = logical pixels × scale_factor.

Used by:

• Layout engine: viewport units (vw, vh, vmin, vmax)
• Style resolution: ResolveContext gets viewport_width/viewport_height
• Media queries: @media (min-width: ...)

Implementations

impl Viewport

pub fn new(width: u32, height: u32, scale_factor: f64) -> Self

Create a viewport with the given dimensions and scale factor.

pub fn width(&self) -> u32

Width in physical pixels.

pub fn height(&self) -> u32

Height in physical pixels.

pub fn scale_factor(&self) -> f64

DPI scale factor.

pub fn logical_width(&self) -> f64

Width in logical (CSS-like) pixels.

This is what layout uses for viewport units.

pub fn logical_height(&self) -> f64

Height in logical (CSS-like) pixels.

pub fn resize(&mut self, width: u32, height: u32)

Update the physical dimensions.

pub fn set_scale_factor(&mut self, factor: f64)

Update the DPI scale factor.

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Viewport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Viewport

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

Formats the value using the given formatter.

impl Default for Viewport

fn default() -> Self

Returns the “default value” for a type.

impl Copy for Viewport