Add drawing color picker to the result window

A compact ColorPicker appears next to the Draw button when drawing is
enabled; strokes render and export in the chosen color (defaults to
system red).

💘 Generated with Crush

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

Sources/Kapture/CaptureController.swift

@@ -118,15 +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 }
+        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
         )

Sources/Kapture/ResultWindow.swift

@@ -94,6 +94,8 @@ final class CaptureModel: ObservableObject {
     @Published var strokes: [[CGPoint]] = []
     /// Whether the pen is active (drag draws instead of selecting)
     @Published var isDrawing = false
+    /// Current drawing color
+    @Published var drawColor: NSColor = .systemRed
 
     enum CaptureMode {
         case screenshot
@@ -120,7 +122,7 @@ final class CaptureModel: ObservableObject {
         let ctx = NSGraphicsContext.current!.cgContext
         // CGImage draws with a flipped Y in NSGraphicsContext
         ctx.draw(image, in: NSRect(origin: .zero, size: size))
-        NSColor.systemRed.setStroke()
+        drawColor.setStroke()
         ctx.setLineWidth(3)
         ctx.setLineCap(.round)
         ctx.setLineJoin(.round)
@@ -285,6 +287,16 @@ struct ResultView: View {
                 .foregroundStyle(model.isDrawing ? .primary : .secondary)
                 .help("Toggle drawing on the screenshot")
 
+                if model.isDrawing {
+                    ColorPicker("", selection: Binding(
+                        get: { Color(nsColor: model.drawColor) },
+                        set: { model.drawColor = NSColor($0) }
+                    ), supportsOpacity: false)
+                    .labelsHidden()
+                    .frame(width: 28)
+                    .help("Drawing color")
+                }
+
                 if !model.strokes.isEmpty {
                     Button {
                         model.clearAnnotations()
@@ -429,7 +441,7 @@ struct ScreenshotPane: View {
                             path.addLine(to: CGPoint(x: origin.x + point.x * scale, y: origin.y + point.y * scale))
                         }
                     }
-                    context.stroke(path, with: .color(.red), lineWidth: 2.5)
+                    context.stroke(path, with: .color(Color(nsColor: model.drawColor)), lineWidth: 2.5)
                 }
                 .allowsHitTesting(false)
 
@@ -443,7 +455,7 @@ struct ScreenshotPane: View {
                                 path.addLine(to: CGPoint(x: origin.x + point.x * scale, y: origin.y + point.y * scale))
                             }
                         }
-                        context.stroke(path, with: .color(.red), lineWidth: 2.5)
+                        context.stroke(path, with: .color(Color(nsColor: model.drawColor)), lineWidth: 2.5)
                     }
                     .allowsHitTesting(false)
                 }

build-app.sh

@@ -108,9 +108,9 @@ cat > "$APP/Contents/Info.plist" <<'PLIST'
     <key>CFBundleIconFile</key>
     <string>Icon</string>
     <key>CFBundleShortVersionString</key>
-    <string>1.3.0</string>
+    <string>1.3.3</string>
     <key>CFBundleVersion</key>
-    <string>30</string>
+    <string>33</string>
     <key>LSUIElement</key>
     <true/>
     <key>NSHighResolutionCapable</key>