Struct DamageTracker 

pub struct DamageTracker { /* private fields */ }

Implementations

impl DamageTracker

pub fn new() -> DamageTracker

pub fn mark_rect(&mut self, rect: Rect)

Marks a specific area (window coords) as dirty.

pub fn mark_full(&mut self)

Whole viewport needs repainting (resize, DPI, theme, root mount/unmount).

pub fn mark_layout(&mut self)

The change affects measurement/layout (not just pixels).

pub fn mark(&mut self, flags: Dirty)

Raw mark (e.g. Dirty::OVERLAY, Dirty::CANVAS).

pub fn request_frame(&mut self)

Called by PaintCtx::request_frame() — “paint me in the next frame”.

pub fn take_motion(&mut self) -> bool

Consumes the request from the previous frame. Called once per frame, BEFORE paint.

pub fn is_empty(&self) -> bool

No pixels or animation work are pending.

Bookkeeping-only flags (HIT_TEST, DATA) do not count as a frame.

pub fn needs_frame(&self) -> bool

pub fn needs_layout(&self) -> bool

pub fn needs_paint(&self) -> bool

pub fn flags(&self) -> Dirty

pub fn paint_region(&self) -> Option<Rect>

Some(rect) = repaint only this area. None = full repaint.

Layout changes can move or remove children, so they always require a full repaint; a screen-space rect alone cannot describe that damage. The 2 px margin covers anti-aliasing; the renderer adds more headroom for shadows before using the region as a scissor.

This is the bounding box of paint_regions; use the individual regions when the backend supports multiple scissors.

pub fn paint_regions(&self) -> Option<Vec<Rect>>

Some(regions) = repaint only these disjoint areas. None = full repaint.

Each region is inflated by 2 px for anti-aliasing. Regions that overlap are merged while marks accumulate; if more than the region cap remain, they collapse into one bounding box.

pub fn after_paint(&mut self)

Called after paint — resets the current frame state. Does NOT touch motion_pending, because paint may have queued a new request.

pub fn record_skipped(&mut self)

Called when a frame is skipped.

Also clears bookkeeping markers (HIT_TEST, DATA) that require no pixels so they do not keep needs_frame() alive forever.

pub fn clear_all(&mut self)

Full reset (new root, new window).

pub fn frames_painted(&self) -> u64

pub fn frames_skipped(&self) -> u64

pub fn skip_rate(&self) -> f32

Fraction of skipped frames (0.0 – 1.0).

Trait Implementations

impl Clone for DamageTracker

fn clone(&self) -> DamageTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DamageTracker

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

Formats the value using the given formatter.

impl Default for DamageTracker

fn default() -> DamageTracker

Returns the “default value” for a type.