Struct EguiRunOutput 

pub struct EguiRunOutput {
    pub shapes: Vec<ClippedShape>,
    pub pixels_per_point: f32,
    pub textures_delta: TexturesDelta,
    pub repaint_delay: Duration,
}

The results of running one frame of egui.

EguiRunOutput collects the renderable shapes, texture updates, and scale factor from a single egui run. It also provides convenience methods for updating its contents from an egui::Context and for draining the data when it is time to render.

This is typically created once per backend instance and reused across frames.

Fields

shapes: Vec<ClippedShape>

The clipped shapes that should be rendered for the current frame.

This is produced by egui’s tessellation step and represents what should be drawn to the screen.

pixels_per_point: f32

The logical-to-physical pixel scaling factor used by egui in this frame.

Backends should respect this when converting coordinates to pixels.

textures_delta: TexturesDelta

The delta of texture updates required for this frame.

Includes new textures to upload and old textures to free.

repaint_delay: Duration

How long until egui wants the ROOT viewport repainted, as reported by the last Self::update (egui’s ViewportOutput::repaint_delay).

Duration::ZERO means egui needs another frame immediately — e.g. the frame just run was a sizing pass for a freshly shown egui::Area, whose real (positioned, visible) frame must follow. Duration::MAX means egui is idle and the backend may block on input. Event-driven backends should fold this into their idle wait so animations and first-frame layout show without an extra input event.

Implementations

impl EguiRunOutput

pub fn update( &mut self, ctx: &Context, state: &mut State, run_ui: impl FnMut(&Context), )

Run egui for one frame and update this output with the results.

Parameters

• ctx: The egui::Context used to run the UI.
• state: A backend state that provides input for egui and handles platform output (clipboard, cursor, etc.).
• run_ui: A closure that builds the UI using the given egui::Context.

Behavior

• Takes input events from state.
• Runs egui with the provided run_ui closure.
• Handles platform output via state.
• Stores the frame’s shapes, texture updates, and scale factor in this EguiRunOutput.

pub fn take(&mut self) -> (TexturesDelta, Vec<ClippedShape>)

Take ownership of the texture updates and shapes for the current frame.

This clears both fields in the struct, leaving them empty for the next frame.

Returns

• (textures_delta, shapes) where:
  • textures_delta: The egui::TexturesDelta with texture uploads/free requests.
  • shapes: The tessellated shapes that should be rendered.

Trait Implementations

impl Default for EguiRunOutput

fn default() -> Self

Creates an empty EguiRunOutput with no shapes, no texture updates, and a scale factor of 1.0.