Round window-capture corners with a clip instead of masking()

The masking() call could silently fail against ScreenCaptureKit's pixel
format, leaving sharp corners. Clip to a rounded path and redraw instead,
verified headlessly for corner clipping and orientation.

💘 Generated with Crush

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

Sources/Kapture/CaptureController.swift

@@ -329,8 +329,11 @@ final class CaptureController: NSObject {
                 // An overlapping window from the same app means this is an
                 // 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 && $0.frame.intersects(hover.frame)
+                    $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)
@@ -399,23 +402,19 @@ final class ScreenCapture {
         // Apply a rounded-corner alpha mask for window captures, matching
         // macOS window chrome (≈10pt radius, scaled to image pixels).
         if roundedCorners {
+            // Clip to a rounded rect and redraw — deterministic corner alpha
+            // (masking() can fail depending on the source pixel format).
             let radius = 10 * scaleX
-            let maskRect = CGRect(x: 0, y: 0, width: result.width, height: result.height)
+            guard let ctx = CGContext(
-            guard let maskCtx = 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.addPath(CGPath(roundedRect: CGRect(x: 0, y: 0, width: result.width, height: result.height), cornerWidth: radius, cornerHeight: radius, transform: nil))
-            maskCtx.fill(maskRect)
+            ctx.clip()
-            maskCtx.setBlendMode(.clear)
+            ctx.draw(result, in: CGRect(x: 0, y: 0, width: result.width, height: result.height))
-            maskCtx.setFillColor(CGColor(gray: 0, alpha: 1))
+            if let masked = ctx.makeImage() {
-            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
             }
         }

build-app.sh

@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.8.2</string>
+    <string>1.8.4</string>
     <key>CFBundleVersion</key>
-    <string>82</string>
+    <string>84</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>