Struct ImageData 

pub struct ImageData {
    pub id: u64,
    pub pixels: Vec<u8>,
    pub width: u32,
    pub height: u32,
}

Fields

id: u64

Content address: equal pixels at equal dimensions give equal ids, whoever built them and whenever.

The renderers key their texture caches on this and nothing else, so the id has to identify the image. A per-construction counter identified the allocation instead: a caller that rebuilt the same image each frame — which is what building an ImageData inside a widget body does — minted a fresh key every time, and every entry behind it became unreachable weight the cache could only shed by hitting its byte budget.

pixels: Vec<u8>

RGBA8 pixels with premultiplied alpha. Premultiplication is applied automatically in new().

width: u32

height: u32

Implementations

impl ImageData

pub fn new(pixels: Vec<u8>, width: u32, height: u32) -> Self

pub fn from_premultiplied(pixels: Vec<u8>, width: u32, height: u32) -> Self

Builds from bytes that are ALREADY premultiplied (e.g. a resvg Pixmap), skipping the premultiply step new() performs.

Trait Implementations

impl Clone for ImageData

fn clone(&self) -> ImageData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImageData

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

Formats the value using the given formatter.