Function encode_png_simple

native/shared/src/renderer/util.rs:145–151

Encode an RGB byte buffer (no alpha) as a PNG. Used by the pending-screenshot path so callers can hand us a path and get a PNG written to disk without worrying about cross-FFI buffer handoff.

(width: u32, height: u32, rgb: &[u8])

/// pending-screenshot path so callers can hand us a path and get a
/// PNG written to disk without worrying about cross-FFI buffer handoff.
pub(super) fn encode_png_simple(width: u32, height: u32, rgb: &[u8]) -> Option<Vec<u8>> {
    use image::{ImageBuffer, Rgb};
    let buf: ImageBuffer<Rgb<u8>, Vec<u8>> = ImageBuffer::from_raw(width, height, rgb.to_vec())?;
    let mut out = std::io::Cursor::new(Vec::new());
    buf.write_to(&mut out, image::ImageFormat::Png).ok()?;
    Some(out.into_inner())
}