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examples/glupload: Fix segmentation fault by ensuring the glutin context stays alive longer than the GStreamer GL display

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Otherwise the GL display might still use a Wayland display that is
already freed.

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/issues/196
This commit is contained in:
Sebastian Dröge 2019-04-29 15:43:51 +03:00
parent bf96e264c9
commit 2b122a20c5
1 changed files with 18 additions and 2 deletions
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20
examples/src/bin/glupload.rs
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@ -597,9 +597,13 @@ impl App {
Ok(())
}
fn into_context(self: App) -> glutin::WindowedContext<glutin::PossiblyCurrent> {
self.windowed_context
}
}
fn main_loop(mut app: App) -> Result<(), Error> {
fn main_loop(mut app: App) -> Result<glutin::WindowedContext<glutin::PossiblyCurrent>, Error> {
println!(
"Pixel format of the window's GL context {:?}",
app.windowed_context.get_pixel_format()
@ -676,11 +680,23 @@ fn main_loop(mut app: App) -> Result<(), Error> {
app.pipeline.send_event(gst::Event::new_eos().build());
app.pipeline.set_state(gst::State::Null)?;
Ok(app.into_context())
}
fn cleanup(
_windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>,
) -> Result<(), failure::Error> {
// To ensure that the context stays alive longer than the pipeline or any reference
// inside GStreamer to the GL context, its display or anything else. See
// https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/issues/196
//
// We might do any window/GL specific cleanup here as needed.
Ok(())
}
fn example_main() {
match App::new().and_then(main_loop) {
match App::new().and_then(main_loop).and_then(cleanup) {
Ok(r) => r,
Err(e) => eprintln!("Error! {}", e),
}