Desktop: Isolate CEF-rendered UI into separate crate and process (#4321)

* Extract CEF rendered UI into a separate process and crate * Review * Review * Review * Review * Remove necessary workarounds * Block on frame copy ack * Crop and resample frames correctly * Skip blank frames * Fix deps * Fix fmt * Fix clippy warning * Review * Fix todo
2026-09-29 12:08:13 +08:00 · 2026-07-14 14:51:20 -07:00
parent 97a43e66fb
commit ba0a97aefe
82 changed files with 4768 additions and 1291 deletions
@@ -0,0 +1,39 @@
+use windows::Win32::Foundation::{CloseHandle, HANDLE};
+use windows::Win32::System::JobObjects::{
+	AssignProcessToJobObject, CreateJobObjectW, JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE, JOBOBJECT_EXTENDED_LIMIT_INFORMATION, JobObjectExtendedLimitInformation, SetInformationJobObject,
+};
+use windows::core::PCWSTR;
+
+pub(crate) struct KillOnCloseJob(HANDLE);
+
+// SAFETY: job object handles may be used and closed from any thread.
+unsafe impl Send for KillOnCloseJob {}
+unsafe impl Sync for KillOnCloseJob {}
+
+impl KillOnCloseJob {
+	pub(crate) fn assign(child: &std::process::Child) -> windows::core::Result<Self> {
+		use std::os::windows::io::AsRawHandle;
+		unsafe {
+			let job = CreateJobObjectW(None, PCWSTR::null())?;
+			let job = Self(job);
+			let mut info = JOBOBJECT_EXTENDED_LIMIT_INFORMATION::default();
+			info.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;
+			SetInformationJobObject(
+				job.0,
+				JobObjectExtendedLimitInformation,
+				&info as *const _ as *const core::ffi::c_void,
+				std::mem::size_of::<JOBOBJECT_EXTENDED_LIMIT_INFORMATION>() as u32,
+			)?;
+			AssignProcessToJobObject(job.0, HANDLE(child.as_raw_handle()))?;
+			Ok(job)
+		}
+	}
+}
+
+impl Drop for KillOnCloseJob {
+	fn drop(&mut self) {
+		unsafe {
+			let _ = CloseHandle(self.0);
+		}
+	}
+}