Struct BackbufferState 

pub struct BackbufferState {
    pub cache: BackbufferCache,
    pub dirty: bool,
    pub width: u32,
    pub height: u32,
    pub spec_kind: BackbufferKind,
    pub theme_epoch: u64,
    pub typography_epoch: u64,
    pub async_state_epoch: u64,
    pub repaint_count: u64,
    pub composite_count: u64,
    /* private fields */
}

Retained widget backbuffer state shared by software and GL implementations.

Fields

cache: BackbufferCache

dirty: bool

width: u32

height: u32

spec_kind: BackbufferKind

theme_epoch: u64

Visuals epoch recorded the last time this retained surface was repainted. Retained backend layers compare it against the live theme epoch so a dark/light flip rebuilds the window/layer in the shared paint path.

typography_epoch: u64

Typography epoch recorded the last time this retained surface was repainted. Without this, a clean parent FBO can keep compositing old text after global font/LCD settings change.

async_state_epoch: u64

Async-state epoch (see crate::animation::async_state_epoch) recorded the last paint. Mismatch forces a re-raster so a freshly-arrived async result (image fetch, font load) doesn’t composite the previous frame’s stale FBO contents.

repaint_count: u64

composite_count: u64

Implementations

impl BackbufferState

pub fn new() -> Self

pub fn id(&self) -> u64

pub fn invalidate(&mut self)

Trait Implementations

impl Default for BackbufferState

fn default() -> Self

Returns the “default value” for a type.