fix: stage manager no longer skews the thumbnails (closes #1731)

src/api-wrappers/CGWindowID.swift

@@ -18,7 +18,7 @@ extension CGWindowID {
     func screenshot() -> CGImage? {
         // we use CGSHWCaptureWindowList because it can screenshot minimized windows, which CGWindowListCreateImage can't
         var windowId_ = self
-        let list = CGSHWCaptureWindowList(CGS_CONNECTION, &windowId_, 1, [.ignoreGlobalClipShape, .bestResolution]).takeRetainedValue() as! [CGImage]
+        let list = CGSHWCaptureWindowList(CGS_CONNECTION, &windowId_, 1, [.ignoreGlobalClipShape, .bestResolution, .fullSize]).takeRetainedValue() as! [CGImage]
         return list.first
 //        // CGWindowListCreateImage
 //        return CGWindowListCreateImage(.null, .optionIncludingWindow, self, [.boundsIgnoreFraming, .bestResolution])

src/api-wrappers/private-apis/SkyLight.framework.swift

@@ -15,6 +15,8 @@ struct CGSWindowCaptureOptions: OptionSet {
     // on a retina display, 1px is spread on 4px, so nominalResolution is 1/4 of bestResolution
     static let nominalResolution = CGSWindowCaptureOptions(rawValue: 1 << 9)
     static let bestResolution = CGSWindowCaptureOptions(rawValue: 1 << 8)
+    // when Stage Manager is enabled, screenshots can become skewed. This param gets us full-size screenshots regardless
+    static let fullSize = CGSWindowCaptureOptions(rawValue: 1 << 19)
 }
 
 /// returns the connection to the WindowServer. This connection ID is required when calling other APIs