Struct Offscreen 

pub struct Offscreen {
    pub shared_texture_enabled: bool,
    pub external_begin_frame_enabled: bool,
    pub cursor_handler: Option<Arc<CursorHandler>>,
    /* private fields */
}

Windowless browser configuration. The application owns painting, input/IME forwarding and composition; Tauri keeps its IPC, protocols and browser lifecycle. Offscreen webviews use Alloy style and cannot be reparented.

Enable settings.windowless_rendering_enabled through crate::Cef::with_settings before creating an offscreen webview. Use crate::Cef::on_window_event for native input and redraws, and crate::Webview::browser to reach CEF’s host API.

The native window and event types are tauri-winit’s: depend on the same tauri-winit version this crate uses to name them.

Fields

shared_texture_enabled: bool

Delivers shared resources through RenderHandler::on_accelerated_paint. Open and copy them during the callback, respecting CEF’s resource lifetime.

external_begin_frame_enabled: bool

Requires the application to call BrowserHost::send_external_begin_frame.

cursor_handler: Option<Arc<CursorHandler>>

Handles cursor changes; other display notifications remain managed by Tauri.

Implementations

impl Offscreen

pub fn new<F: Fn(OffscreenView) -> RenderHandler + Send + Sync + 'static>( handler: F, ) -> Self

Creates a render handler for each webview on the CEF UI thread.

The handler must implement view_rect and a paint callback. Read the current bounds and scale from view; call OffscreenView::request_redraw after painting. CEF view rectangles use logical pixels, while paint buffers use physical pixels. CEF callbacks must not block on queued Tauri window operations.

Trait Implementations

impl Clone for Offscreen

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.