Struct CaptureVTable 

pub struct CaptureVTable {
    pub open: fn(index: u32, width: u32, height: u32) -> u64,
    pub read: fn(handle: u64, out: &mut Vec<u8>) -> (u32, u32),
    pub close: fn(handle: u64),
}

A platform frame-capture backend (camera / screen), registered by the dll at startup so the cross-platform capture widgets can pull real frames instead of their built-in test pattern. The dll provides one per OS (v4l2 on Linux, AVFoundation on macOS, Media Foundation on Windows, ScreenCaptureKit / PipeWire / DXGI for screens, …). These are plain Rust fn pointers - the dll links azul-layout statically, so registering + calling is a Rust-to-Rust call, no extern "C"/trait-object dance.

Fields

open: fn(index: u32, width: u32, height: u32) -> u64

Open source index (camera device / display index) at the requested width x height. Returns an opaque handle, or 0 on failure (the worker then falls back to the test pattern).

read: fn(handle: u64, out: &mut Vec<u8>) -> (u32, u32)

Block for the next frame, writing tightly-packed RGBA8 into out (resized as needed). Returns the actual frame (width, height), or (0, 0) on end-of-stream / error (the worker then stops + closes).

close: fn(handle: u64)

Close + free the source.

Trait Implementations

impl Clone for CaptureVTable

fn clone(&self) -> CaptureVTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CaptureVTable