refactor: clean up

Memola/Canvas/Core/Canvas.swift

@@ -20,7 +20,7 @@ final class Canvas: NSManagedObject, Identifiable {
 
     let gridContext = GridContext()
     let viewPortContext = ViewPortContext()
-    let maximumZoomScale: CGFloat = 25
+    let maximumZoomScale: CGFloat = 28
     let minimumZoomScale: CGFloat = 3.1
 
     var transform: simd_float4x4 = .init()
@@ -42,11 +42,11 @@ final class Canvas: NSManagedObject, Identifiable {
 // MARK: - Actions
 extension Canvas {
     func load() {
+        state = .loading
         let start = Date().formatted(.dateTime.minute().second().secondFraction(.fractional(5)))
         for stroke in graphicContext.strokes {
             if let stroke = stroke as? Stroke {
                 stroke.loadVertices()
-                NSLog("[Memola] - \(stroke.quads.count) quads")
             }
         }
         let end = Date().formatted(.dateTime.minute().second().secondFraction(.fractional(5)))

Memola/Canvas/Geometries/Stroke/Stroke.swift

@@ -85,9 +85,6 @@ extension Stroke: Drawable {
     }
 
     func draw(device: MTLDevice, renderEncoder: MTLRenderCommandEncoder) {
-        if isEmpty {
-            loadVertices()
-        }
         guard !isEmpty else { return }
         prepare(device: device)
         renderEncoder.setFragmentTexture(texture, index: 0)

Memola/Persistence/Core/Persistence.swift

@@ -19,6 +19,12 @@ class Persistence {
         shared.persistentContainer.viewContext
     }()
 
+    static var backgroundContext: NSManagedObjectContext = {
+        let context = shared.persistentContainer.newBackgroundContext()
+        context.automaticallyMergesChangesFromParent = true
+        return context
+    }()
+
     private lazy var viewContext: NSManagedObjectContext = {
         persistentContainer.viewContext
     }()