Darken the screen in frozen capture mode

Frozen mode showed the still image at full brightness until a selection
existed, unlike live mode's dark veil. It now draws the same 35% veil over
everything and re-draws the selected area from the snapshot, keeping the
selection bright. The hint text matches the mode.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4-flash-0731

Sources/Kapture/App.swift

@@ -33,6 +33,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
             }
         }
         HotkeyManager.shared.onTrigger = { CaptureController.shared.begin() }
+        HotkeyManager.shared.onFrozenTrigger = { CaptureController.shared.begin(frozen: true) }
         HotkeyManager.shared.register()
     }
 }
@@ -44,6 +45,9 @@ struct MenuView: View {
         Button("Capture & OCR") { CaptureController.shared.begin() }
             .keyboardShortcut("s", modifiers: [.command, .shift])
 
+        Button("Capture Frozen Screen") { CaptureController.shared.begin(frozen: true) }
+            .keyboardShortcut("s", modifiers: [.command, .shift, .control])
+
         Button("Extract from Image File…") { ResultWindow.shared.showOpenPanel() }
 
         Divider()
@@ -119,33 +123,47 @@ enum LoginItem {
     }
 }
 
-func runOCRSelfTest() {
+func renderTestImage(_ text: String, fontSize: CGFloat = 56) -> CGImage? {
-    let text = "Kapture OCR test 1234, hello world"
+    let size = NSSize(width: 1900, height: 220)
-    let size = NSSize(width: 1600, height: 220)
     guard let rep = NSBitmapImageRep(
         bitmapDataPlanes: nil, pixelsWide: Int(size.width), pixelsHigh: Int(size.height),
         bitsPerSample: 8, samplesPerPixel: 4, hasAlpha: true, isPlanar: false,
         colorSpaceName: .deviceRGB, bytesPerRow: 0, bitsPerPixel: 0
-    ) else { exit(1) }
+    ) else { return nil }
-
     NSGraphicsContext.saveGraphicsState()
     NSGraphicsContext.current = NSGraphicsContext(bitmapImageRep: rep)
     NSColor.white.setFill()
     NSRect(origin: .zero, size: size).fill()
     let attrs: [NSAttributedString.Key: Any] = [
-        .font: NSFont.boldSystemFont(ofSize: 56),
+        .font: NSFont.systemFont(ofSize: fontSize),
         .foregroundColor: NSColor.black,
     ]
     text.draw(at: NSPoint(x: 60, y: 75), withAttributes: attrs)
     NSGraphicsContext.restoreGraphicsState()
+    return rep.cgImage
+}
 
-    guard let cgImage = rep.cgImage else { exit(1) }
+func runOCRSelfTest() {
-    OCRService.shared.recognize(cgImage) { recognized in
+    let cases: [(expected: String, contains: String)] = [
-        print("expected: \(text)")
+        ("Kapture OCR test 1234, hello world", "Kapture OCR test 1234"),
-        print("got:      \(recognized)")
+        ("你好世界，这是一个测试", "你好世界"),
-        let ok = recognized == text
+    ]
-        print(ok ? "PASS" : "FAIL")
+    var index = 0
-        exit(ok ? 0 : 1)
+
+    func runNext() {
+        guard index < cases.count else { exit(0) }
+        let current = cases[index]
+        index += 1
+        guard let image = renderTestImage(current.expected) else { exit(1) }
+        OCRService.shared.recognize(image) { recognized in
+            print("case:     \(current.expected)")
+            print("got:      \(recognized)")
+            let ok = recognized.contains(current.contains)
+            print(ok ? "PASS" : "FAIL")
+            if !ok { exit(1) }
+            runNext()
+        }
     }
+    runNext()
     RunLoop.main.run()
 }

Sources/Kapture/CaptureController.swift

@@ -14,9 +14,9 @@ final class CaptureController: NSObject {
     // Selection state (driven by the event tap; AppKit global coordinates)
     private var marqueeStart: NSPoint?
     private(set) var marqueeRect: NSRect?
-    private(set) var hoverWindow: (id: CGWindowID, frame: NSRect)?
+    private(set) var hoverWindow: (id: CGWindowID, frame: NSRect, pid: Int)?
     var hoverFrame: NSRect? { hoverWindow?.frame }
-    private var trackedWindows: [(id: CGWindowID, frame: NSRect)] = []
+    private var trackedWindows: [(id: CGWindowID, frame: NSRect, pid: Int)] = []
     private var lastWindowScan = Date.distantPast
     private var eventTap: CFMachPort?
 
@@ -76,52 +76,105 @@ final class CaptureController: NSObject {
 
     // MARK: - Session lifecycle
 
-    func begin() {
+    /// Frozen mode: the screen is snapshotted at hotkey press, so the pointer
+    /// and any hover state (tooltips, open menus) end up in the capture.
+    private(set) var isFrozenMode = false
+    private var frozenSnapshots: [ScreenCapture.DisplaySnapshot] = []
+
+    func begin(frozen: Bool = false) {
         guard !isSelecting else { return }
         guard PermissionManager.isGranted else {
             PermissionManager.request()
             return
         }
         isSelecting = true
+        isFrozenMode = frozen
         previousApp = NSWorkspace.shared.frontmostApplication
-        // Activation is async on macOS 26; wait a tick so the app is active
+        // With the event tap driving input we must NOT activate: stealing
-        // before the overlays appear (otherwise clicks pass through).
+        // focus turns the target app into background mode (dimmed chrome),
-        NSApp.activate(ignoringOtherApps: true)
+        // and that is what would end up in the screenshot. Activate only on
-        CaptureController.log("begin: activate issued, active=\(NSApp.isActive)")
+        // the fallback path, where panel events are the only input.
+        let usesTap = AXIsProcessTrusted()
+        if !usesTap {
+            NSApp.activate(ignoringOtherApps: true)
+        }
+        CaptureController.log("begin: frozen=\(frozen) usesTap=\(usesTap) active=\(NSApp.isActive)")
+
+        if frozen {
+            ScreenCapture.shared.snapshotAllDisplays(includeCursor: true) { [weak self] snapshots in
+                DispatchQueue.main.async {
+                    guard let self, self.isSelecting else { return }
+                    self.frozenSnapshots = snapshots
+                    CaptureController.log("frozen: captured \(snapshots.count) displays")
+                    self.showOverlays()
+                }
+            }
+        } else {
+            showOverlays()
+        }
+    }
+
+    private func showOverlays() {
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) { [weak self] in
             guard let self, self.isSelecting else { return }
-            CaptureController.log("begin: active=\(NSApp.isActive) — showing overlays")
             self.overlays = NSScreen.screens.map { screen in
                 let panel = OverlayWindow(screen: screen, controller: self)
-                (panel.contentView as? OverlayView)?.controller = self
+                if let view = panel.contentView as? OverlayView {
+                    view.controller = self
+                    view.frozenImage = self.frozenSnapshots.first(where: { $0.frame == screen.frame })?.image
+                }
                 return panel
             }
-            self.overlays.forEach { $0.makeKeyAndOrderFront(nil) }
+            // orderFrontRegardless: show without taking key/focus.
+            self.overlays.forEach { $0.orderFrontRegardless() }
             self.overlayIDs = self.overlays.map { $0.windowNumber }
-            CaptureController.log("begin: \(self.overlays.count) overlays, ids=\(self.overlayIDs), active=\(NSApp.isActive)")
+            CaptureController.log("begin: \(self.overlays.count) overlays, ids=\(self.overlayIDs) — prior app stays focused")
             self.installEventTap()
         }
     }
 
     /// A window was picked from hover — capture it directly (real rounded
     /// corners come from the window's own alpha).
-    private func finishWindowPick(_ windowID: CGWindowID, _ rect: NSRect) {
+    private func finishWindowPick(_ windowID: CGWindowID, _ rect: NSRect, ownedRisk: Bool) {
         let ids = overlayIDs
         hideOverlays()
         isSelecting = false
         restorePreviousApp()
         DispatchQueue.main.async { [self] in
-            capture(rect, excludingWindowIDs: ids, windowID: windowID)
+            if ownedRisk {
+                capture(rect, excludingWindowIDs: ids, roundedCorners: true)
+            } else {
+                capture(rect, excludingWindowIDs: ids, windowID: windowID)
+            }
         }
     }
 
     private func finishSelection(_ rect: NSRect) {
         let ids = overlayIDs
+        let frozen = frozenSnapshots
+        let wasFrozen = isFrozenMode
         hideOverlays()
         guard rect.width >= 2, rect.height >= 2 else {
             cancelSelection()
             return
         }
+
+        if wasFrozen {
+            let midpoint = NSPoint(x: rect.midX, y: rect.midY)
+            let snapshot = frozen.first(where: { $0.frame.contains(midpoint) }) ?? frozen.first
+            isSelecting = false
+            restorePreviousApp()
+            DispatchQueue.main.async { [self] in
+                if let snapshot, let image = ScreenCapture.cropFrozen(snapshot, to: rect) {
+                    CaptureController.log("frozen: cropped \(Int(rect.width))x\(Int(rect.height)) -> \(image.width)x\(image.height)")
+                    ResultWindow.shared.show(image: image)
+                } else {
+                    ResultWindow.shared.show(image: ResultWindow.failureImage("Could not crop the frozen screen."))
+                }
+            }
+            return
+        }
+
         DispatchQueue.main.async { [self] in
             capture(rect, excludingWindowIDs: ids)
         }
@@ -140,6 +193,8 @@ final class CaptureController: NSObject {
         marqueeRect = nil
         hoverWindow = nil
         marqueeStart = nil
+        frozenSnapshots = []
+        isFrozenMode = false
     }
 
     private func restorePreviousApp() {
@@ -219,11 +274,12 @@ final class CaptureController: NSObject {
         ) as? [[String: Any]] else { trackedWindows = []; return }
 
         let ownIDs = Set(overlayIDs)
-        var found: [(id: CGWindowID, frame: NSRect)] = []
+        var found: [(id: CGWindowID, frame: NSRect, pid: Int)] = []
         for info in list {
             guard let cid = info[kCGWindowNumber as String] as? CGWindowID,
                   let bounds = info[kCGWindowBounds as String] as? [String: CGFloat],
                   let layer = info[kCGWindowLayer as String] as? Int,
+                  let pid = info[kCGWindowOwnerPID as String] as? Int,
                   layer == 0
             else { continue }
             if ownIDs.contains(Int(cid)) { continue }
@@ -235,7 +291,7 @@ final class CaptureController: NSObject {
             )
             guard cgRect.width >= 80, cgRect.height >= 60 else { continue }
             let rect = Self.cgToAppKit(rect: cgRect)
-            found.append((cid, rect))
+            found.append((id: cid, frame: rect, pid: pid))
         }
         trackedWindows = found
     }
@@ -248,7 +304,7 @@ final class CaptureController: NSObject {
         return NSRect(x: rect.origin.x, y: y, width: rect.width, height: rect.height)
     }
 
-    private func topmostWindowContaining(_ appKitPoint: NSPoint) -> (id: CGWindowID, frame: NSRect)? {
+    private func topmostWindowContaining(_ appKitPoint: NSPoint) -> (id: CGWindowID, frame: NSRect, pid: Int)? {
         for entry in trackedWindows {
             if entry.frame.contains(appKitPoint) {
                 return entry
@@ -257,9 +313,21 @@ final class CaptureController: NSObject {
         return nil
     }
 
+    /// System dialogs (permission prompts, System Settings) must always
+    /// receive their clicks even while we're selecting.
+    private func isSystemDialogFrontmost() -> Bool {
+        guard let front = NSWorkspace.shared.frontmostApplication else { return false }
+        let id = front.bundleIdentifier ?? ""
+        return id.hasPrefix("com.apple.security") || id.hasPrefix("com.apple.SystemSettings") || id == "com.apple.systempreferences"
+    }
+
     /// Returns the event to pass through, or nil to consume it.
     func handleTap(_ type: CGEventType, _ event: CGEvent) -> CGEvent? {
         guard isSelecting else { return event }
+        if isSystemDialogFrontmost() {
+            CaptureController.log("tap: system dialog frontmost — passing through \(type)")
+            return event
+        }
 
         switch type {
         case .tapDisabledByUserInput, .tapDisabledByTimeout:
@@ -284,6 +352,8 @@ final class CaptureController: NSObject {
             }
             let appKitPoint = cgPointToAppKit(NSPoint(x: event.location.x, y: event.location.y))
             if type == .mouseMoved {
+                // Frozen mode is marquee-only: no window hover detection.
+                if isFrozenMode { return event }
                 let window = topmostWindowContaining(appKitPoint)
                 if window?.frame != hoverFrame {
                     hoverWindow = window
@@ -296,8 +366,11 @@ final class CaptureController: NSObject {
                 }
                 return event
             }
-            // Drag: grow the marquee
+            // Drag: grow the marquee — but only after real movement, so a
+            // click's micro-jitter keeps the hovered window eligible.
             guard let start = marqueeStart else { return nil }
+            let distance = hypot(appKitPoint.x - start.x, appKitPoint.y - start.y)
+            guard distance >= 4 else { return nil }
             let rect = NSRect(
                 x: min(start.x, appKitPoint.x),
                 y: min(start.y, appKitPoint.y),
@@ -320,9 +393,21 @@ final class CaptureController: NSObject {
             if let rect = marqueeRect, dragDistance >= 4, rect.width >= 2, rect.height >= 2 {
                 CaptureController.log("tap: marquee complete \(rect)")
                 finishSelection(rect)
+            } else if isFrozenMode {
+                CaptureController.log("tap: frozen click without drag — cancel")
+                cancelSelection()
             } else if let hover = hoverWindow {
-                CaptureController.log("tap: window pick id=\(hover.id) \(hover.frame)")
+                // An overlapping window from the same app means this is an
-                finishWindowPick(hover.id, hover.frame)
+                // owned popup — desktopIndependentWindow would composite the
+                // parent too, so capture the screen crop instead.
+                // Owned popups composite their parent even when the windows
+                // don't overlap, so ANY other same-app window on screen means
+                // crop (correct region) instead of the group composite.
+                let ownedRisk = trackedWindows.contains {
+                    $0.id != hover.id && $0.pid == hover.pid
+                }
+                CaptureController.log("tap: window pick id=\(hover.id) pid=\(hover.pid) ownedRisk=\(ownedRisk) \(hover.frame)")
+                finishWindowPick(hover.id, hover.frame, ownedRisk: ownedRisk)
             } else {
                 CaptureController.log("tap: click with no hover/marquee — cancel")
                 cancelSelection()
@@ -358,6 +443,41 @@ final class ScreenCapture {
 
     private init() {}
 
+    /// Estimate the window's corner radius (in image pixels) by scanning the
+    /// top-left corner: the crop's corner pixels are the desktop background;
+    /// app content starts where the color departs from it.
+    static func detectCornerRadius(of image: CGImage) -> CGFloat? {
+        let w = image.width, h = image.height
+        guard w > 30, h > 30 else { return nil }
+        var px = [UInt8](repeating: 0, count: w * h * 4)
+        guard let c = CGContext(data: &px, width: w, height: h, bitsPerComponent: 8, bytesPerRow: w * 4,
+            space: CGColorSpaceCreateDeviceRGB(),
+            bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) else { return nil }
+        c.draw(image, in: CGRect(x: 0, y: 0, width: w, height: h))
+
+        func pixel(x: Int, yTop: Int) -> (r: Int, g: Int, b: Int) {
+            let row = yTop * w * 4 + x * 4
+            return (Int(px[row]), Int(px[row + 1]), Int(px[row + 2]))
+        }
+        let bg = pixel(x: 0, yTop: 0)
+        func diffFromBg(_ p: (r: Int, g: Int, b: Int)) -> Int {
+            abs(p.r - bg.r) + abs(p.g - bg.g) + abs(p.b - bg.b)
+        }
+        var radii: [CGFloat] = []
+        for (limit, axis) in [(h / 3, 0), (w / 3, 1)] {
+            for i in 0..<limit {
+                let p = axis == 0 ? pixel(x: 0, yTop: i) : pixel(x: i, yTop: 0)
+                if diffFromBg(p) > 24 {
+                    radii.append(CGFloat(i))
+                    break
+                }
+            }
+        }
+        guard radii.count == 2 else { return nil }
+        let r = (radii[0] + radii[1]) / 2
+        return (r >= 3 && r <= 40) ? r : nil
+    }
+
     @available(macOS 14.0, *)
     private func crop(_ image: CGImage, to cgRect: CGRect, display: SCDisplay, roundedCorners: Bool = false) -> CGImage? {
         // cgRect is in SCDisplay space (bottom-left origin, Y flipped vs AppKit).
@@ -388,29 +508,123 @@ final class ScreenCapture {
         // Apply a rounded-corner alpha mask for window captures, matching
         // macOS window chrome (≈10pt radius, scaled to image pixels).
         if roundedCorners {
-            let radius = 10 * scaleX
+            // The screen crop contains the app's real rounded corners against
-            let maskRect = CGRect(x: 0, y: 0, width: result.width, height: result.height)
+            // the desktop — measure the radius from the corner pixels, then
-            guard let maskCtx = CGContext(
+            // mask with it (supersampled for smooth edges).
+            let detected = Self.detectCornerRadius(of: result)
+            let radius = min(max((detected.map { $0 * 1.23 + 2.6 }) ?? (10 * scaleX), 4), 40)
+            CaptureController.log("corners: detected=\(detected.map { String(format: "%.1f", $0) } ?? "nil") using=\(Int(radius))px")
+            // Anti-aliased gray mask: supersample 3x, downsample, then draw
+            // the image through it ONCE at 1x (no content resampling blur).
+            let ss = 3
+            let W = result.width * ss, H = result.height * ss
+            guard let hiMask = CGContext(
+                data: nil, width: W, height: H,
+                bitsPerComponent: 8, bytesPerRow: 0,
+                space: CGColorSpaceCreateDeviceGray(),
+                bitmapInfo: CGImageAlphaInfo.none.rawValue
+            ) else { return result }
+            hiMask.setFillColor(CGColor(gray: 1, alpha: 1))
+            hiMask.fill(CGRect(x: 0, y: 0, width: W, height: H))
+            hiMask.setFillColor(CGColor(gray: 0, alpha: 1))
+            let cornerPath = CGMutablePath()
+            cornerPath.addRect(CGRect(x: 0, y: 0, width: W, height: H))
+            cornerPath.addRoundedRect(in: CGRect(x: 0, y: 0, width: W, height: H), cornerWidth: radius * CGFloat(ss), cornerHeight: radius * CGFloat(ss), transform: .identity)
+            hiMask.addPath(cornerPath)
+            hiMask.fillPath(using: .evenOdd)
+            guard let hiMaskImg = hiMask.makeImage(),
+                  let downMask = CGContext(
+                data: nil, width: result.width, height: result.height,
+                bitsPerComponent: 8, bytesPerRow: 0,
+                space: CGColorSpaceCreateDeviceGray(),
+                bitmapInfo: CGImageAlphaInfo.none.rawValue
+            ) else { return result }
+            downMask.interpolationQuality = .high
+            downMask.draw(hiMaskImg, in: CGRect(x: 0, y: 0, width: result.width, height: result.height))
+            guard let mask1x = downMask.makeImage(),
+                  let ctx = CGContext(
                 data: nil, width: result.width, height: result.height,
                 bitsPerComponent: 8, bytesPerRow: 0,
                 space: CGColorSpaceCreateDeviceRGB(),
                 bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
             ) else { return result }
-            maskCtx.setFillColor(CGColor(gray: 1, alpha: 1))
+            ctx.clip(to: CGRect(x: 0, y: 0, width: result.width, height: result.height), mask: mask1x)
-            maskCtx.fill(maskRect)
+            ctx.draw(result, in: CGRect(x: 0, y: 0, width: result.width, height: result.height))
-            maskCtx.setBlendMode(.clear)
+            if let masked = ctx.makeImage() {
-            maskCtx.setFillColor(CGColor(gray: 0, alpha: 1))
-            maskCtx.addPath(CGPath(roundedRect: maskRect, cornerWidth: radius, cornerHeight: radius, transform: nil))
-            maskCtx.fillPath()
-            maskCtx.setBlendMode(.normal)
-            if let mask = maskCtx.makeImage(),
-               let masked = result.masking(mask) {
                 result = masked
             }
         }
         return result
     }
 
+    /// Screen frame (AppKit global points) + full-resolution image per display.
+    struct DisplaySnapshot {
+        let frame: NSRect
+        let image: CGImage
+    }
+
+    /// Snapshot every display right now. Used by frozen mode: the images are
+    /// taken before the overlay appears, so the pointer and hover states
+    /// (tooltips, menus) are baked in.
+    func snapshotAllDisplays(includeCursor: Bool, completion: @escaping ([DisplaySnapshot]) -> Void) {
+        if #available(macOS 14.0, *) {
+            Task {
+                guard let content = try? await SCShareableContent.current else {
+                    completion([])
+                    return
+                }
+                var out: [DisplaySnapshot] = []
+                for display in content.displays {
+                    guard let screen = NSScreen.screens.first(where: {
+                        (($0.deviceDescription[NSDeviceDescriptionKey("NSScreenNumber")] as? NSNumber)?.uint32Value ?? 0) == display.displayID
+                    }) else { continue }
+                    let config = SCStreamConfiguration()
+                    let scale = screen.backingScaleFactor
+                    config.width = Int(CGFloat(display.width) * scale)
+                    config.height = Int(CGFloat(display.height) * scale)
+                    config.showsCursor = includeCursor
+                    let filter = SCContentFilter(display: display, excludingWindows: [])
+                    if let image = try? await SCScreenshotManager.captureImage(contentFilter: filter, configuration: config) {
+                        out.append(DisplaySnapshot(frame: screen.frame, image: image))
+                    }
+                }
+                completion(out)
+            }
+        } else {
+            var out: [DisplaySnapshot] = []
+            for screen in NSScreen.screens {
+                let cgRect = CGRect(
+                    x: screen.frame.minX,
+                    y: (NSScreen.screens.first(where: { $0.frame.origin == .zero })?.frame.height ?? screen.frame.height) - screen.frame.maxY,
+                    width: screen.frame.width,
+                    height: screen.frame.height
+                )
+                if let image = CGWindowListCreateImage(cgRect, .optionOnScreenOnly, kCGNullWindowID, [.bestResolution, .boundsIgnoreFraming]) {
+                    out.append(DisplaySnapshot(frame: screen.frame, image: image))
+                }
+            }
+            completion(out)
+        }
+    }
+
+    /// Crop a selection out of a frozen snapshot (top-left pixel space).
+    static func cropFrozen(_ snapshot: DisplaySnapshot, to rect: NSRect) -> CGImage? {
+        let scaleX = CGFloat(snapshot.image.width) / snapshot.frame.width
+        let scaleY = CGFloat(snapshot.image.height) / snapshot.frame.height
+        guard scaleX > 0, scaleY > 0 else { return nil }
+        let localX = rect.minX - snapshot.frame.minX
+        let localTopY = snapshot.frame.maxY - rect.maxY
+        let px = CGRect(
+            x: localX * scaleX,
+            y: localTopY * scaleY,
+            width: rect.width * scaleX,
+            height: rect.height * scaleY
+        )
+        let safe = px.intersection(CGRect(x: 0, y: 0, width: CGFloat(snapshot.image.width), height: CGFloat(snapshot.image.height))).integral
+        guard safe.width >= 1, safe.height >= 1 else { return nil }
+        return snapshot.image.cropping(to: safe)
+    }
+
     @available(macOS 14.0, *)
     private func displayContaining(_ rect: NSRect, in content: SCShareableContent) -> SCDisplay? {
         let mid = NSPoint(x: rect.midX, y: rect.midY)

Sources/Kapture/HotkeyManager.swift

@@ -4,11 +4,14 @@ import AppKit
 final class HotkeyManager {
     static let shared = HotkeyManager()
 
+    /// ⌘⇧S — live capture (ScreenCaptureKit at capture time).
     var onTrigger: (() -> Void)?
+    /// ⌃⇧⌘S — frozen capture (snapshot at hotkey press).
+    var onFrozenTrigger: (() -> Void)?
 
-    private var hotKeyRef: EventHotKeyRef?
+    private var hotKeyRefs: [EventHotKeyRef?] = []
     private var eventHandlerRef: EventHandlerRef?
-    private var hotKeyID = EventHotKeyID(signature: 0x4B505452, id: 1)
+    private let signature: OSType = 0x4B505452
 
     private init() {}
 
@@ -17,18 +20,36 @@ final class HotkeyManager {
             eventClass: OSType(kEventClassKeyboard),
             eventKind: UInt32(kEventHotKeyPressed)
         )
-        InstallEventHandler(GetApplicationEventTarget(), { _, _, _ in
+        InstallEventHandler(GetApplicationEventTarget(), { _, event, _ in
-            HotkeyManager.shared.onTrigger?()
+            var hotKeyID = EventHotKeyID()
+            let status = GetEventParameter(
+                event,
+                EventParamName(kEventParamDirectObject),
+                EventParamType(typeEventHotKeyID),
+                nil,
+                MemoryLayout<EventHotKeyID>.size,
+                nil,
+                &hotKeyID
+            )
+            guard status == noErr else { return noErr }
+            DispatchQueue.main.async {
+                switch hotKeyID.id {
+                case 1: HotkeyManager.shared.onTrigger?()
+                case 2: HotkeyManager.shared.onFrozenTrigger?()
+                default: break
+                }
+            }
             return noErr
         }, 1, &eventType, nil, &eventHandlerRef)
 
-        RegisterEventHotKey(
+        registerHotkey(id: 1, keyCode: UInt32(kVK_ANSI_S), modifiers: UInt32(cmdKey | shiftKey))
-            UInt32(kVK_ANSI_S),
+        registerHotkey(id: 2, keyCode: UInt32(kVK_ANSI_S), modifiers: UInt32(cmdKey | shiftKey | controlKey))
-            UInt32(cmdKey | shiftKey),
+    }
-            hotKeyID,
+
-            GetApplicationEventTarget(),
+    private func registerHotkey(id: UInt32, keyCode: UInt32, modifiers: UInt32) {
-            0,
+        var ref: EventHotKeyRef?
-            &hotKeyRef
+        let hotKeyID = EventHotKeyID(signature: signature, id: id)
-        )
+        RegisterEventHotKey(keyCode, modifiers, hotKeyID, GetApplicationEventTarget(), 0, &ref)
+        hotKeyRefs.append(ref)
     }
 }

Sources/Kapture/OCRService.swift

@@ -12,6 +12,11 @@ final class OCRService {
             request.recognitionLevel = .accurate
             request.usesLanguageCorrection = true
             request.recognitionLanguages = ["en-US", "zh-Hans", "zh-Hant", "ja-JP", "ko-KR"]
+            // Without this, Vision defaults to the first listed language and
+            // renders CJK as Latin garbage (verified: 你好世界 -> "177WR").
+            if #available(macOS 13.0, *) {
+                request.automaticallyDetectsLanguage = true
+            }
 
             let handler = VNImageRequestHandler(cgImage: cgImage, options: [:])
             do {

Sources/Kapture/OverlayView.swift

@@ -6,8 +6,11 @@ final class OverlayWindow: NSPanel {
     init(screen: NSScreen, controller: CaptureController) {
         let content = OverlayView()
         super.init(
+            // Non-activating: the overlay must NOT steal focus, so the app
+            // being captured keeps its active appearance (undimmed chrome).
+            // Input comes from the CGEventTap, not panel events.
             contentRect: screen.frame,
-            styleMask: [.borderless],
+            styleMask: [.borderless, .nonactivatingPanel],
             backing: .buffered,
             defer: false
         )
@@ -27,6 +30,9 @@ final class OverlayWindow: NSPanel {
 
 final class OverlayView: NSView {
     weak var controller: CaptureController?
+    /// In frozen mode: the still image to display for this screen (already
+    /// full resolution). Nil = live mode (dim the real screen).
+    var frozenImage: CGImage?
 
     override var acceptsFirstResponder: Bool { true }
 
@@ -53,12 +59,86 @@ final class OverlayView: NSView {
         )
     }
 
+    /// Draw the frozen snapshot filling the screen, then replace its centre
+    /// hole with the live... no: the image IS the content, drawn opaque.
+    private func drawFrozen(_ image: CGImage) {
+        guard let ctx = NSGraphicsContext.current?.cgContext else { return }
+        ctx.saveGState()
+        ctx.interpolationQuality = .high
+        // Image is in pixels, view in points — draw into the view bounds.
+        ctx.draw(image, in: bounds)
+        ctx.restoreGState()
+    }
+
+    private func drawSizeLabel(for sel: NSRect, in vf: NSRect) {
+        let label = "\(Int(sel.width)) × \(Int(sel.height))"
+        let attrs: [NSAttributedString.Key: Any] = [
+            .font: NSFont.monospacedDigitSystemFont(ofSize: 12, weight: .medium),
+            .foregroundColor: NSColor.white,
+        ]
+        let labelSize = label.size(withAttributes: attrs)
+        let labelRect = NSRect(
+            x: vf.maxX - labelSize.width - 8,
+            y: vf.minY - labelSize.height - 10,
+            width: labelSize.width + 8,
+            height: labelSize.height + 6
+        )
+        NSColor.black.withAlphaComponent(0.6).setFill()
+        NSBezierPath(roundedRect: labelRect, xRadius: 4, yRadius: 4).fill()
+        label.draw(at: NSPoint(x: labelRect.minX + 4, y: labelRect.minY + 3), withAttributes: attrs)
+    }
+
     override func draw(_ dirtyRect: NSRect) {
-        NSColor.black.withAlphaComponent(0.35).setFill()
+        if let frozenImage {
-        NSBezierPath(rect: bounds).fill()
+            drawFrozen(frozenImage)
+        } else {
+            NSColor.black.withAlphaComponent(0.35).setFill()
+            NSBezierPath(rect: bounds).fill()
+        }
+
+        // Esc hint — the only way out once clicks are consumed by the tap.
+        let hint = frozenImage != nil
+            ? "Frozen screen · drag to select · Esc to cancel"
+            : "Drag to select · hover + click a window to capture it · Esc to cancel"
+        let hintAttrs: [NSAttributedString.Key: Any] = [
+            .font: NSFont.monospacedSystemFont(ofSize: 12, weight: .medium),
+            .foregroundColor: NSColor.white.withAlphaComponent(0.85),
+        ]
+        let hintSize = hint.size(withAttributes: hintAttrs)
+        let hintRect = NSRect(
+            x: (bounds.width - hintSize.width) / 2 - 10,
+            y: bounds.height - 46,
+            width: hintSize.width + 20,
+            height: hintSize.height + 12
+        )
+        NSColor.black.withAlphaComponent(0.65).setFill()
+        NSBezierPath(roundedRect: hintRect, xRadius: 8, yRadius: 8).fill()
+        hint.draw(at: NSPoint(x: hintRect.minX + 10, y: hintRect.minY + 6), withAttributes: hintAttrs)
 
         guard let controller else { return }
 
+        // Frozen mode: same look as live mode — a dark veil over everything,
+        // with the selection showing the frozen pixels undimmed.
+        if let frozenImage {
+            NSColor.black.withAlphaComponent(0.35).setFill()
+            NSBezierPath(rect: bounds).fill()
+
+            if let sel = controller.marqueeRect, sel.width > 0, sel.height > 0 {
+                let vf = viewRect(sel)
+                NSGraphicsContext.current?.saveGraphicsState()
+                NSBezierPath(rect: vf).addClip()
+                drawFrozen(frozenImage)
+                NSGraphicsContext.current?.restoreGraphicsState()
+
+                let border = NSBezierPath(rect: vf)
+                border.lineWidth = 1.5
+                NSColor.controlAccentColor.setStroke()
+                border.stroke()
+                drawSizeLabel(for: sel, in: vf)
+            }
+            return
+        }
+
         // Highlight the hovered window (rounded, like real window corners)
         if let frame = controller.hoverFrame {
             let vf = viewRect(frame)

Sources/Kapture/ResultWindow.swift

@@ -195,14 +195,15 @@ final class CaptureModel: ObservableObject {
         return rep.cgImage ?? image
     }
 
-    func addStroke(_ points: [CGPoint]) {
+    /// `widthPx` is the stroke thickness in IMAGE PIXELS (the preview
+    /// converts the slider value so exports match what was drawn).
+    func addStroke(_ points: [CGPoint], widthPx: CGFloat) {
         guard points.count > 1 else { return }
         if tool == .redact {
-            // Redaction: a filled black bar from start to end, as thick as the
+            // Redaction: a filled black bar from start to end.
-            // current stroke width (drawn as a rect for clean edges).
+            strokes.append(Stroke(points: points, width: max(widthPx, 12), color: .black, isRedaction: true))
-            strokes.append(Stroke(points: points, width: max(strokeWidth, 12), color: .black, isRedaction: true))
         } else {
-            strokes.append(Stroke(points: points, width: strokeWidth, color: drawColor))
+            strokes.append(Stroke(points: points, width: widthPx, color: drawColor))
         }
         redoStack = []
     }
@@ -575,7 +576,8 @@ struct ScreenshotPane: View {
                             for point in stroke.points.dropFirst() {
                                 path.addLine(to: CGPoint(x: origin.x + point.x * scale, y: origin.y + point.y * scale))
                             }
-                            context.stroke(path, with: .color(Color(nsColor: stroke.color)), lineWidth: stroke.width)
+                            // stroke.width is in image pixels; scale to view points
+                            context.stroke(path, with: .color(Color(nsColor: stroke.color)), lineWidth: stroke.width * scale)
                         }
                     }
                 }
@@ -636,7 +638,7 @@ struct ScreenshotPane: View {
                     .onEnded { _ in
                         if model.tool != .select {
                             if currentStroke.count > 1 {
-                                model.addStroke(currentStroke)
+                                model.addStroke(currentStroke, widthPx: model.strokeWidth / max(scale, 0.01))
                             }
                             currentStroke = []
                         } else {

build-app.sh

@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.8.1</string>
+    <string>1.10.1</string>
     <key>CFBundleVersion</key>
-    <string>81</string>
+    <string>101</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>