Capture picked windows natively with real rounded corners

Window picks now capture via ScreenCaptureKit's desktopIndependentWindow
filter, so the image carries the app's actual rounded-corner alpha
instead of a fixed 10pt mask that let the desktop show through on apps
with larger radii. Falls back to crop+mask when the window is not in the
shareable content.

💘 Generated with Crush

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

Sources/Kapture/CaptureController.swift

@@ -14,7 +14,8 @@ 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 hoverFrame: NSRect?
+    private(set) var hoverWindow: (id: CGWindowID, frame: NSRect)?
+    var hoverFrame: NSRect? { hoverWindow?.frame }
     private var trackedWindows: [(id: CGWindowID, frame: NSRect)] = []
     private var lastWindowScan = Date.distantPast
     private var eventTap: CFMachPort?
@@ -102,14 +103,15 @@ final class CaptureController: NSObject {
         }
     }
 
-    /// A window was picked from hover — capture it with rounded corners.
+    /// A window was picked from hover — capture it directly (real rounded
-    private func finishWindowPick(_ rect: NSRect) {
+    /// corners come from the window's own alpha).
+    private func finishWindowPick(_ windowID: CGWindowID, _ rect: NSRect) {
         let ids = overlayIDs
         hideOverlays()
         isSelecting = false
         restorePreviousApp()
         DispatchQueue.main.async { [self] in
-            capture(rect, excludingWindowIDs: ids, roundedCorners: true)
+            capture(rect, excludingWindowIDs: ids, windowID: windowID)
         }
     }
 
@@ -136,7 +138,7 @@ final class CaptureController: NSObject {
         overlays.forEach { $0.orderOut(nil) }
         overlays = []
         marqueeRect = nil
-        hoverFrame = nil
+        hoverWindow = nil
         marqueeStart = nil
     }
 
@@ -246,10 +248,10 @@ final class CaptureController: NSObject {
         return NSRect(x: rect.origin.x, y: y, width: rect.width, height: rect.height)
     }
 
-    private func topmostWindowContaining(_ appKitPoint: NSPoint) -> NSRect? {
+    private func topmostWindowContaining(_ appKitPoint: NSPoint) -> (id: CGWindowID, frame: NSRect)? {
-        for (_, frame) in trackedWindows {
+        for entry in trackedWindows {
-            if frame.contains(appKitPoint) {
+            if entry.frame.contains(appKitPoint) {
-                return frame
+                return entry
             }
         }
         return nil
@@ -282,9 +284,9 @@ final class CaptureController: NSObject {
             }
             let appKitPoint = cgPointToAppKit(NSPoint(x: event.location.x, y: event.location.y))
             if type == .mouseMoved {
-                let frame = topmostWindowContaining(appKitPoint)
+                let window = topmostWindowContaining(appKitPoint)
-                if frame != hoverFrame {
+                if window?.frame != hoverFrame {
-                    hoverFrame = frame
+                    hoverWindow = window
                     renderOverlays()
                 }
                 return event
@@ -298,7 +300,7 @@ final class CaptureController: NSObject {
                 height: abs(appKitPoint.y - start.y)
             )
             marqueeRect = rect
-            hoverFrame = nil
+            hoverWindow = nil
             renderOverlays()
             return nil
         case .leftMouseDown:
@@ -313,9 +315,9 @@ 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 let hover = hoverFrame {
+            } else if let hover = hoverWindow {
-                CaptureController.log("tap: window pick \(hover)")
+                CaptureController.log("tap: window pick id=\(hover.id) \(hover.frame)")
-                finishWindowPick(hover)
+                finishWindowPick(hover.id, hover.frame)
             } else {
                 CaptureController.log("tap: click with no hover/marquee — cancel")
                 cancelSelection()
@@ -328,8 +330,8 @@ final class CaptureController: NSObject {
 
     // MARK: - Capture
 
-    private func capture(_ rect: NSRect, excludingWindowIDs ids: [Int], roundedCorners: Bool = false) {
+    private func capture(_ rect: NSRect, excludingWindowIDs ids: [Int], roundedCorners: Bool = false, windowID: CGWindowID? = nil) {
-        ScreenCapture.shared.capture(rect, excludingWindowIDs: ids, roundedCorners: roundedCorners) { [weak self] image in
+        ScreenCapture.shared.capture(rect, excludingWindowIDs: ids, roundedCorners: roundedCorners, windowID: windowID) { [weak self] image in
             DispatchQueue.main.async {
                 self?.isSelecting = false
                 self?.restorePreviousApp()
@@ -414,7 +416,7 @@ final class ScreenCapture {
         return content.displays.first(where: { $0.displayID == cgID }) ?? content.displays.first
     }
 
-    func capture(_ rect: NSRect, excludingWindowIDs excludedIDs: [Int], roundedCorners: Bool = false, completion: @escaping (CGImage?) -> Void) {
+    func capture(_ rect: NSRect, excludingWindowIDs excludedIDs: [Int], roundedCorners: Bool = false, windowID: CGWindowID? = nil, completion: @escaping (CGImage?) -> Void) {
         if #available(macOS 14.0, *) {
             Task {
                 guard let content = try? await SCShareableContent.current,
@@ -449,6 +451,25 @@ final class ScreenCapture {
                     height: rect.height
                 )
 
+                // Window pick: capture the window DIRECTLY — the image comes
+                // with the app's real rounded-corner alpha (no mask guessing).
+                if let windowID,
+                   let scWindow = content.windows.first(where: { $0.windowID == windowID }) {
+                    var windowConfig = SCStreamConfiguration()
+                    windowConfig.width = Int(scWindow.frame.width * backingScale)
+                    windowConfig.height = Int(scWindow.frame.height * backingScale)
+                            windowConfig.showsCursor = false
+                    if let windowImage = try? await SCScreenshotManager.captureImage(
+                        contentFilter: SCContentFilter(desktopIndependentWindow: scWindow),
+                        configuration: windowConfig
+                    ) {
+                        CaptureController.log("capture: WINDOW id=\(windowID) image=\(windowImage.width)x\(windowImage.height) (native alpha corners)")
+                        completion(windowImage)
+                        return
+                    }
+                    CaptureController.log("capture: window filter failed for id=\(windowID) — falling back to crop+mask")
+                }
+
                 guard let image = try? await SCScreenshotManager.captureImage(contentFilter: filter, configuration: config) else {
                     completion(nil)
                     return

build-app.sh

@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.7.4</string>
+    <string>1.8.0</string>
     <key>CFBundleVersion</key>
-    <string>74</string>
+    <string>80</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>