From cf9ed17134532edc77877712f20d3bdd4ac44257 Mon Sep 17 00:00:00 2001
From: NADY <3747231+naadydev@users.noreply.github.com>
Date: Sun, 23 Aug 2026 10:54:52 +0200
Subject: [PATCH] fix: initialise CoreGraphics before building a window capture
 filter

Selecting a window in the source picker aborted the ScreenCaptureKit
helper before it produced a single frame:

    Assertion failed: (did_initialize), function CGS_REQUIRE_INIT,
    file CGInitialization.c, line 44

The helper is a plain command-line executable, so nothing in it ever
connects to the window server. SCContentFilter(desktopIndependentWindow:)
resolves which display a window sits on by calling into SkyLight
(SLSGetDisplaysWithRect), and SkyLight asserts when CoreGraphics was
never initialised in the process.

Display capture is unaffected, because SCContentFilter(display:excludingWindows:)
is handed an already-resolved display and never asks SkyLight to resolve a
rect. That is why only the window branch of makeCaptureTarget crashed.

Touching any CoreGraphics display API performs the initialisation, so a
single CGMainDisplayID() at the top of main() is enough. CoreGraphics is
already imported; this avoids pulling AppKit into the helper or standing
up an NSApplication in a CLI process.
---
 .../ScreenCaptureRecorder.swift                          | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/electron/native/screencapturekit/Sources/OpenScreenScreenCaptureKitHelper/ScreenCaptureRecorder.swift b/electron/native/screencapturekit/Sources/OpenScreenScreenCaptureKitHelper/ScreenCaptureRecorder.swift
index 75163dee7..2e88e5c41 100644
--- a/electron/native/screencapturekit/Sources/OpenScreenScreenCaptureKitHelper/ScreenCaptureRecorder.swift
+++ b/electron/native/screencapturekit/Sources/OpenScreenScreenCaptureKitHelper/ScreenCaptureRecorder.swift
@@ -802,6 +802,15 @@ final class ScreenCaptureRecorder: NSObject, SCStreamOutput, SCStreamDelegate {
 struct OpenScreenScreenCaptureKitHelper {
 	static func main() async {
 		do {
+			// This helper is a plain command-line executable, so nothing has connected it to
+			// the window server yet. `SCContentFilter(desktopIndependentWindow:)` reaches into
+			// SkyLight (`SLSGetDisplaysWithRect`) to find the display a window sits on, and
+			// SkyLight aborts with `CGS_REQUIRE_INIT` when CoreGraphics was never initialised
+			// in the process — so every window capture crashed before it produced a frame,
+			// while display capture (which never resolves a rect) worked fine. Touching any
+			// CoreGraphics display API first performs that initialisation.
+			_ = CGMainDisplayID()
+
 			guard CommandLine.arguments.count == 2 else {
 				throw HelperError.invalidArguments
 			}