Struct Region 

pub struct Region {
    pub origin: [u32; 2],
    pub size: [u32; 2],
    pub scale: Scale,
}

A physical-pixel rectangle carrying its own logical→physical Scale. Construct with a struct literal so the two [u32; 2] fields are named at the call site (no positional origin/size swap is possible).

Fields

origin: [u32; 2]

Top-left corner in physical pixels.

size: [u32; 2]

Width and height in physical pixels.

scale: Scale

This region’s logical→physical scale.

Implementations

impl Region

pub fn clip_to(&self, source_extent: [u32; 2]) -> Option<Region>

Clip this region to a source texture of size source_extent, returning the in-bounds intersection (its scale preserved).

Returns None when the intersection is empty — i.e. the region is zero-area or lies fully outside the texture. That None is the blur no-op: prepare returns Ok(None) and record is never called (DESIGN §4.4/§4.5). A partially offscreen region is clipped to the in-bounds sub-rect rather than dropped, so the backend never samples outside the source (the “Region clipping” core operation, DESIGN §11). All arithmetic saturates, so an origin + size past u32::MAX cannot overflow.

Trait Implementations

impl Clone for Region

fn clone(&self) -> Region

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Region

impl Debug for Region

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

Formats the value using the given formatter.

impl Display for Region

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

Formats the value using the given formatter.

impl PartialEq for Region

fn eq(&self, other: &Region) -> 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 Region