start header

OBAKit/Mapping/MapSnapshotter.swift

@@ -62,6 +62,31 @@ class MapSnapshotter: NSObject {
         return options
     }
 
+    public func snapshot(stop: Stop, traitCollection: UITraitCollection) async throws -> UIImage {
+        let options = snapshotOptions(stop: stop, traitCollection: traitCollection)
+
+        let snapshotter = MKMapSnapshotter(options: options)
+        let snapshot = try await snapshotter.start()
+
+        // Generate the stop icon.
+        let stopIcon = self.stopIconFactory.buildIcon(for: stop, isBookmarked: false, traits: traitCollection)
+
+        // Calculate the point at which to draw the stop icon.
+        // It needs to be shifted up by 1/2 the stop icon height
+        // in order to draw it at the proper location.
+        var point = snapshot.point(for: stop.coordinate)
+        point.y -= (stopIcon.size.height / 2.0)
+
+        // Render the composited image.
+        var annotatedImage = UIImage.draw(image: stopIcon, onto: snapshot.image, at: point)
+
+        if traitCollection.userInterfaceStyle == .light {
+            annotatedImage = annotatedImage.darkened()
+        }
+
+        return annotatedImage
+    }
+
     public func snapshot(stop: Stop, traitCollection: UITraitCollection, completion: @escaping MapSnapshotterCompletionHandler) {
         let options = snapshotOptions(stop: stop, traitCollection: traitCollection)
 

OBAKit/Mapping/MapSnapshotterEnvironmentKey.swift

@@ -0,0 +1,22 @@
+//
+//  MapSnapshotterEnvironmentKey.swift
+//  OBAKit
+//
+//  Created by Alan Chu on 2/22/23.
+//
+
+import SwiftUI
+import OBAKitCore
+
+private struct StopIconFactoryKey: EnvironmentKey {
+    static public let defaultValue: StopIconFactory = {
+        return StopIconFactory(iconSize: ThemeMetrics.defaultMapAnnotationSize, themeColors: ThemeColors.shared)
+    }()
+}
+
+extension EnvironmentValues {
+    var stopIconFactory: StopIconFactory {
+        get { self[StopIconFactoryKey.self] }
+        set { self[StopIconFactoryKey.self] = newValue }
+    }
+}

OBAKit/Stops/StopArrivalHeaderView.swift

@@ -0,0 +1,45 @@
+//
+//  StopArrivalHeaderView.swift
+//  OBAKit
+//
+//  Created by Alan Chu on 2/22/23.
+//
+
+import MapKit
+import SwiftUI
+
+struct StopArrivalHeaderView: View {
+    @Environment(\.stopIconFactory) var stopIconFactory
+
+    @State var region: MKCoordinateRegion
+    @State var mapImage: UIImage?
+
+    var body: some View {
+        ZStack {
+            Map(coordinateRegion: $region, interactionModes: [])
+            Text("asdf")
+
+            if let mapImage {
+                Image(uiImage: mapImage)
+            }
+        }
+        .task(priority: .high) {
+//            stopIconFactory.buildIcon(for: <#T##Stop#>, isBookmarked: <#T##Bool#>, traits: <#T##UITraitCollection#>)
+//            let snapshot = MapSnapshotter(size: , stopIconFactory: <#T##StopIconFactory#>)
+        }
+    }
+}
+
+struct StopArrivalHeaderView_Previews: PreviewProvider {
+    static var previews: some View {
+        StopArrivalHeaderView(
+            region: MapHelpers.coordinateRegionWith(
+                center: CLLocationCoordinate2D(latitude: 47.62217, longitude: -122.32090),
+                zoomLevel: 16,
+                size: CGSize(width: 375, height: 250)
+            )
+        )
+        .frame(width: 375, height: 250, alignment: .center)
+        .previewLayout(.sizeThatFits)
+    }
+}