From a74a86d001c402be475b6bf324bd0e6efd180a3c Mon Sep 17 00:00:00 2001
From: TZGyn <spectator_brethren761@slmails.com>
Date: Sun, 23 Aug 2026 13:27:41 +0800
Subject: [PATCH] Fix vertical offset in ScreenCaptureKit crops
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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The captured CGImage has a top-left origin, while the crop rect was
computed in SCDisplay space (bottom-left). Flip Y within the display's
bounds when converting to pixel coordinates so the crop lands exactly
where the user selected.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4-flash-0731
---
 Sources/Kapture/CaptureController.swift | 16 ++++++++--------
 build-app.sh                            |  4 ++--
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/Sources/Kapture/CaptureController.swift b/Sources/Kapture/CaptureController.swift
index 9df7235..30b0f72 100644
--- a/Sources/Kapture/CaptureController.swift
+++ b/Sources/Kapture/CaptureController.swift
@@ -118,18 +118,18 @@ final class ScreenCapture {
 
     @available(macOS 14.0, *)
     private func crop(_ image: CGImage, to cgRect: CGRect, display: SCDisplay) -> CGImage? {
-        // cgRect is already in SCDisplay space (Y flipped relative to AppKit).
-        // Derive the pixel scale from the image we actually got, relative to
-        // the display's point frame.
+        // cgRect is in SCDisplay space (bottom-left origin, Y flipped vs AppKit).
+        // The captured image has a TOP-LEFT origin. So within the display,
+        // we must flip Y: pixelY = displayHeight - (cgY - displayMinY) - cgHeight.
         let scaleX = CGFloat(image.width) / display.frame.width
         let scaleY = CGFloat(image.height) / display.frame.height
         guard scaleX > 0, scaleY > 0 else { return nil }
-        // pxRect is in image pixel space with a TOP-LEFT origin (SCDisplay space).
-        // CGImage.cropping(to:) expects the same top-left rect, so no Y flip
-        // is needed here — this preserves the previous CGContext behavior.
+        let localMinX = cgRect.minX - display.frame.minX
+        let localMaxY = cgRect.maxY - display.frame.minY
+        let flippedY = display.frame.height - localMaxY
         let pxRect = CGRect(
-            x: (cgRect.minX - display.frame.minX) * scaleX,
-            y: (cgRect.minY - display.frame.minY) * scaleY,
+            x: localMinX * scaleX,
+            y: flippedY * scaleY,
             width: cgRect.width * scaleX,
             height: cgRect.height * scaleY
         )
diff --git a/build-app.sh b/build-app.sh
index df558df..c6d8db9 100755
--- a/build-app.sh
+++ b/build-app.sh
@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.3.1</string>
+    <string>1.3.2</string>
     <key>CFBundleVersion</key>
-    <string>31</string>
+    <string>32</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>