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e6fe6683d0
Two hours went into a corrupted capture whose only symptom was a clean log saying "libdrmtap loaded: /usr/lib/rustdesk/libdrmtap.so.0 (v0.4.15)". The library behind that soname symlink was a pre-release 0.4.15 that reported the version but did not export drmtap_render_node, so the service silently stopped naming the exporting GPU. The log named the symlink it asked for, which is not evidence of anything, and the version it printed came from the library itself, which was the part that lied. Log the file the absolute candidate actually resolves to, and warn when a library reports 0.4.15 or newer while missing drmtap_render_node or drmtap_list_devices, naming that file: a version that claims features the symbols do not back means a stale or pre-release build, and the effect is invisible otherwise. Only the absolute candidate is resolved, because dlopen does not search the process CWD for a bare soname while canonicalize would. Also correct two places that no longer matched the code: the security document still described an /etc/ld.so.conf.d drop-in and an ldconfig trigger that build.py deliberately does not ship (the .so is dlopened by absolute path and the package makes the soname symlink itself), and the comment above the render node lookup still said an unnamed exporter always falls back to auto-selection.
Derived from https://github.com/quadrupleslap/scrap
scrap
Scrap records your screen! At least it does if you're on Windows, macOS, or Linux.
Usage
[dependencies]
scrap = "0.5"
Its API is as simple as it gets!
struct Display; /// A screen.
struct Frame; /// An array of the pixels that were on-screen.
struct Capturer; /// A recording instance.
impl Capturer {
/// Begin recording.
pub fn new(display: Display) -> io::Result<Capturer>;
/// Try to get a frame.
/// Returns WouldBlock if it's not ready yet.
pub fn frame<'a>(&'a mut self) -> io::Result<Frame<'a>>;
pub fn width(&self) -> usize;
pub fn height(&self) -> usize;
}
impl Display {
/// The primary screen.
pub fn primary() -> io::Result<Display>;
/// All the screens.
pub fn all() -> io::Result<Vec<Display>>;
pub fn width(&self) -> usize;
pub fn height(&self) -> usize;
}
impl<'a> ops::Deref for Frame<'a> {
/// A frame is just an array of bytes.
type Target = [u8];
}
The Frame Format
- The frame format is guaranteed to be packed BGRA.
- The width and height are guaranteed to remain constant.
- The stride might be greater than the width, and it may also vary between frames.
System Requirements
| OS | Minimum Requirements |
|---|---|
| macOS | macOS 10.8 |
| Linux | XCB + SHM + RandR |
| Windows | DirectX 11.1 |