Crate aether_renderer_capture 

Capture HTML/CSS/JS animations as a deterministic, transparent PNG sequence.

Renders a page frame by frame in chrome-headless-shell with virtual time and an injected frame clock, so every run gives byte-identical frames.

Two capture modes:

• begin-frame (Linux): Chrome only draws when we issue HeadlessExperimental.beginFrame, which also returns the screenshot.
• screenshot (macOS and Windows, where BeginFrame is unsupported or unreliable): the frame clock shim runs rAF callbacks itself, then Page.captureScreenshot.

As a library

capture calls back with each frame (async). png_stream runs a capture on its own thread and returns a std::io::Read of PNG files back to back, which is exactly what aether_renderer_core::render_stream reads:

use aether_renderer_capture::{png_stream, CaptureOptions};

let opts = CaptureOptions::new("anim.html", "/path/to/chrome-headless-shell")
    .size(1080, 1080)
    .fps(30)
    .duration_secs(4.0);
let frames = opts.frame_count();
let (stream, capture) = png_stream(opts)?;
// aether_renderer_core::render_stream(cfg, stream, Some(frames as u32), |p| { ... })?;
let report = capture.wait()?;

Modules

sink

Where captured frames go: a folder, a ZIP, or stdout.

Structs

CaptureHandle

The capture thread behind a PngStream.

CaptureOptions

What to capture and how.

CaptureReport

What a finished capture did.

PngStream

PNG files back to back, produced by a capture running on another thread. See png_stream.

Enums

Mode

How frames are drawn and grabbed.

Functions

capture

Capture opts, calling on_frame(index, png) for every frame in order.

png_stream

Run a capture on its own thread and read it as a PNG stream (PNG files back to back), e.g. for aether_renderer_core::render_stream.