461 lines
17 KiB
Swift
461 lines
17 KiB
Swift
//
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// EmulationViewController.swift
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// Delta
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//
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// Created by Riley Testut on 5/5/15.
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// Copyright (c) 2015 Riley Testut. All rights reserved.
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//
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import UIKit
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import DeltaCore
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import SNESDeltaCore
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class EmulationViewController: UIViewController
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{
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//MARK: - Properties -
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/** Properties **/
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/// Should only be set when preparing for segue. Otherwise, should be considered immutable
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var game: Game! {
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didSet
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{
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guard oldValue != game else { return }
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self.emulatorCore = SNESEmulatorCore(game: game)
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}
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}
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private(set) var emulatorCore: EmulatorCore! {
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didSet
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{
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self.preferredContentSize = self.emulatorCore.preferredRenderingSize
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}
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}
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// If non-nil, will override the default preview action items returned in previewActionItems()
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var overridePreviewActionItems: [UIPreviewActionItem]?
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// Annoying iOS gotcha: if the previewingContext(_:viewControllerForLocation:) callback takes too long, the peek/preview starts, but fails to actually present the view controller
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// To workaround, we have this closure to defer work for Peeking/Popping until the view controller appears
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// Hacky, but works
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var deferredPreparationHandler: (Void -> Void)?
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//MARK: - Private Properties
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@IBOutlet private var controllerView: ControllerView!
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@IBOutlet private var gameView: GameView!
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@IBOutlet private var controllerViewHeightConstraint: NSLayoutConstraint!
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private var isPreviewing: Bool {
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guard let presentationController = self.presentationController else { return false }
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return NSStringFromClass(presentationController.dynamicType).containsString("PreviewPresentation")
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}
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private var pauseViewController: PauseViewController?
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private var context = CIContext(options: [kCIContextWorkingColorSpace: NSNull()])
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//MARK: - Initializers -
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/** Initializers **/
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required init?(coder aDecoder: NSCoder)
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{
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super.init(coder: aDecoder)
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NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(EmulationViewController.updateControllers), name: ExternalControllerDidConnectNotification, object: nil)
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NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(EmulationViewController.updateControllers), name: ExternalControllerDidDisconnectNotification, object: nil)
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NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(EmulationViewController.willResignActive(_:)), name: UIApplicationWillResignActiveNotification, object: UIApplication.sharedApplication())
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NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(EmulationViewController.didBecomeActive(_:)), name: UIApplicationDidBecomeActiveNotification, object: UIApplication.sharedApplication())
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}
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deinit
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{
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// To ensure the emulation stops when cancelling a peek/preview gesture
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self.emulatorCore.stopEmulation()
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}
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//MARK: - Overrides
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/** Overrides **/
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//MARK: - UIViewController
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/// UIViewController
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override func viewDidLoad()
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{
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super.viewDidLoad()
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// Set this to 0 now and update it in viewDidLayoutSubviews to ensure there are never conflicting constraints
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// (such as when peeking and popping)
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self.controllerViewHeightConstraint.constant = 0
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self.gameView.backgroundColor = UIColor.clearColor()
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self.emulatorCore.addGameView(self.gameView)
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let controllerSkin = ControllerSkin.defaultControllerSkinForGameUTI(self.game.typeIdentifier)
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self.controllerView.containerView = self.view
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self.controllerView.controllerSkin = controllerSkin
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self.controllerView.addReceiver(self)
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self.emulatorCore.setGameController(self.controllerView, atIndex: 0)
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self.updateControllers()
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}
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override func viewDidAppear(animated: Bool)
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{
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super.viewDidAppear(animated)
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self.deferredPreparationHandler?()
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self.deferredPreparationHandler = nil
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// Yes, order DOES matter here, in order to prevent audio from being slightly delayed after peeking with 3D Touch (ugh so tired of that issue)
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switch self.emulatorCore.state
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{
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case .Stopped:
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self.emulatorCore.startEmulation()
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self.updateCheats()
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case .Running: break
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case .Paused:
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self.updateCheats()
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self.emulatorCore.resumeEmulation()
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}
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// Toggle audioManager.enabled to reset the audio buffer and ensure the audio isn't delayed from the beginning
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// This is especially noticeable when peeking a game
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self.emulatorCore.audioManager.enabled = false
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self.emulatorCore.audioManager.enabled = true
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}
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override func viewDidLayoutSubviews()
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{
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super.viewDidLayoutSubviews()
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if Settings.localControllerPlayerIndex != nil && self.controllerView.intrinsicContentSize() != CGSize(width: UIViewNoIntrinsicMetric, height: UIViewNoIntrinsicMetric) && !self.isPreviewing
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{
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let scale = self.view.bounds.width / self.controllerView.intrinsicContentSize().width
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self.controllerViewHeightConstraint.constant = self.controllerView.intrinsicContentSize().height * scale
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}
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else
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{
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self.controllerViewHeightConstraint.constant = 0
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}
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self.controllerView.hidden = self.isPreviewing
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}
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override func prefersStatusBarHidden() -> Bool
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{
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return true
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}
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/// <UIContentContainer>
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override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator)
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{
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super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
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self.controllerView.beginAnimatingUpdateControllerSkin()
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coordinator.animateAlongsideTransition({ _ in
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if self.pauseViewController != nil
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{
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// We need to manually "refresh" the game screen, otherwise the system tries to cache the rendered image, but skews it incorrectly when rotating b/c of UIVisualEffectView
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self.gameView.inputImage = self.gameView.outputImage
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}
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}, completion: { _ in
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self.controllerView.finishAnimatingUpdateControllerSkin()
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})
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}
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// MARK: - Navigation -
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// In a storyboard-based application, you will often want to do a little preparation before navigation
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override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
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{
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self.emulatorCore.pauseEmulation()
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if segue.identifier == "pauseSegue"
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{
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let pauseViewController = segue.destinationViewController as! PauseViewController
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pauseViewController.pauseText = self.game.name
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let dismissAction: (PauseItem -> Void) = { item in
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pauseViewController.dismiss()
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}
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// Swift has a bug where using unowned references can lead to swift_abortRetainUnowned errors.
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// Specifically, if you pause a game, open the save states menu, go back, return to menu, select a new game, then try to pause it, it will crash
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// As a dirty workaround, we just use a weak reference, and force unwrap it if needed
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let saveStateItem = PauseItem(image: UIImage(named: "SaveSaveState")!, text: NSLocalizedString("Save State", comment: ""), action: { [unowned self] _ in
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pauseViewController.presentSaveStateViewControllerWithMode(.Saving, delegate: self)
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})
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let loadStateItem = PauseItem(image: UIImage(named: "LoadSaveState")!, text: NSLocalizedString("Load State", comment: ""), action: { [unowned self] _ in
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pauseViewController.presentSaveStateViewControllerWithMode(.Loading, delegate: self)
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})
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let cheatCodesItem = PauseItem(image: UIImage(named: "SmallPause")!, text: NSLocalizedString("Cheat Codes", comment: ""), action: { [unowned self] _ in
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pauseViewController.presentCheatsViewController(delegate: self)
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})
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let sustainButtonItem = PauseItem(image: UIImage(named: "SmallPause")!, text: NSLocalizedString("Sustain Button", comment: ""), action: dismissAction)
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var fastForwardItem = PauseItem(image: UIImage(named: "FastForward")!, text: NSLocalizedString("Fast Forward", comment: ""), action: { [unowned self] item in
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self.emulatorCore.fastForwarding = item.selected
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})
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fastForwardItem.selected = self.emulatorCore.fastForwarding
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pauseViewController.items = [saveStateItem, loadStateItem, cheatCodesItem, fastForwardItem, sustainButtonItem]
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self.pauseViewController = pauseViewController
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}
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}
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@IBAction func unwindFromPauseViewController(segue: UIStoryboardSegue)
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{
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self.pauseViewController = nil
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self.emulatorCore.resumeEmulation()
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// Temporarily disable audioManager to prevent delayed audio bug when using 3D Touch Peek & Pop
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self.emulatorCore.audioManager.enabled = false
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// Re-enable after delay
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(0.1 * Double(NSEC_PER_SEC))), dispatch_get_main_queue()) {
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self.emulatorCore.audioManager.enabled = true
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}
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}
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//MARK: - 3D Touch -
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/// 3D Touch
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override func previewActionItems() -> [UIPreviewActionItem]
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{
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if let previewActionItems = self.overridePreviewActionItems
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{
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return previewActionItems
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}
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let presentingViewController = self.presentingViewController
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let launchGameAction = UIPreviewAction(title: NSLocalizedString("Launch \(self.game.name)", comment: ""), style: .Default) { (action, viewController) in
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// Delaying until next run loop prevents self from being dismissed immediately
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dispatch_async(dispatch_get_main_queue()) {
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presentingViewController?.presentViewController(viewController, animated: true, completion: nil)
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}
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}
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return [launchGameAction]
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}
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}
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//MARK: - Controllers -
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/// Controllers
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private extension EmulationViewController
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{
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@objc func updateControllers()
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{
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self.emulatorCore.removeAllGameControllers()
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if let index = Settings.localControllerPlayerIndex
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{
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self.emulatorCore.setGameController(self.controllerView, atIndex: index)
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}
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for controller in ExternalControllerManager.sharedManager.connectedControllers
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{
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if let index = controller.playerIndex
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{
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self.emulatorCore.setGameController(controller, atIndex: index)
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}
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}
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self.view.setNeedsLayout()
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}
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}
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//MARK: - Save States
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/// Save States
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extension EmulationViewController: SaveStatesViewControllerDelegate
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{
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func saveStatesViewControllerActiveEmulatorCore(saveStatesViewController: SaveStatesViewController) -> EmulatorCore
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{
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return self.emulatorCore
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}
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func saveStatesViewController(saveStatesViewController: SaveStatesViewController, updateSaveState saveState: SaveState)
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{
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guard let filepath = saveState.fileURL.path else { return }
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var updatingExistingSaveState = true
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self.emulatorCore.saveSaveState { temporarySaveState in
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do
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{
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if NSFileManager.defaultManager().fileExistsAtPath(filepath)
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{
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try NSFileManager.defaultManager().replaceItemAtURL(saveState.fileURL, withItemAtURL: temporarySaveState.fileURL, backupItemName: nil, options: [], resultingItemURL: nil)
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}
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else
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{
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try NSFileManager.defaultManager().moveItemAtURL(temporarySaveState.fileURL, toURL: saveState.fileURL)
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updatingExistingSaveState = false
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}
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}
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catch let error as NSError
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{
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print(error)
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}
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}
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if let outputImage = self.gameView.outputImage
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{
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let quartzImage = self.context.createCGImage(outputImage, fromRect: outputImage.extent)
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let image = UIImage(CGImage: quartzImage)
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UIImagePNGRepresentation(image)?.writeToURL(saveState.imageFileURL, atomically: true)
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}
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saveState.modifiedDate = NSDate()
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// Dismiss if updating an existing save state.
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// If creating a new one, don't dismiss.
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if updatingExistingSaveState
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{
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self.pauseViewController?.dismiss()
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}
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}
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func saveStatesViewController(saveStatesViewController: SaveStatesViewController, loadSaveState saveState: SaveStateType)
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{
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self.emulatorCore.loadSaveState(saveState)
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self.updateCheats()
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self.pauseViewController?.dismiss()
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}
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}
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//MARK: - Cheats
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/// Cheats
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extension EmulationViewController: CheatsViewControllerDelegate
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{
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func cheatsViewControllerActiveGame(cheatsViewController: CheatsViewController) -> Game
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{
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return self.emulatorCore.game as! Game
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}
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func cheatsViewController(cheatsViewController: CheatsViewController, didActivateCheat cheat: Cheat) throws
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{
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try self.emulatorCore.activateCheat(cheat)
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}
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func cheatsViewController(cheatsViewController: CheatsViewController, didDeactivateCheat cheat: Cheat) throws
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{
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try self.emulatorCore.deactivateCheat(cheat)
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}
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private func updateCheats()
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{
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let backgroundContext = DatabaseManager.sharedManager.backgroundManagedObjectContext()
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backgroundContext.performBlockAndWait {
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let running = (self.emulatorCore.state == .Running)
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if running
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{
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// Core MUST be paused when activating cheats, or else race conditions could crash the core
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self.emulatorCore.pauseEmulation()
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}
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let predicate = NSPredicate(format: "%K == %@", Cheat.Attributes.game.rawValue, self.emulatorCore.game as! Game)
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let cheats = Cheat.instancesWithPredicate(predicate, inManagedObjectContext: backgroundContext, type: Cheat.self)
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for cheat in cheats
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{
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do
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{
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if cheat.enabled
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{
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try self.emulatorCore.activateCheat(cheat)
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}
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else
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{
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try self.emulatorCore.deactivateCheat(cheat)
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}
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}
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catch EmulatorCore.CheatError.invalid
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{
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print("Invalid cheat:", cheat.name, cheat.code)
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}
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catch EmulatorCore.CheatError.doesNotExist
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{
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// Ignore this error, because we could be deactivating a cheat that hasn't yet been activated
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print("Cheat does not exist:", cheat.name, cheat.code)
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}
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catch let error as NSError
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{
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print("Unknown Cheat Error:", error, cheat.name, cheat.code)
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}
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}
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if running
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{
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self.emulatorCore.resumeEmulation()
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}
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}
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}
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}
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//MARK: - App Lifecycle -
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private extension EmulationViewController
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{
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@objc func willResignActive(notification: NSNotification)
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{
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self.emulatorCore.pauseEmulation()
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}
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@objc func didBecomeActive(notification: NSNotification)
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{
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if self.pauseViewController == nil
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{
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self.emulatorCore.resumeEmulation()
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}
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}
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}
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//MARK: - <GameControllerReceiver> -
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/// <GameControllerReceiver>
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extension EmulationViewController: GameControllerReceiverType
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{
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func gameController(gameController: GameControllerType, didActivateInput input: InputType)
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{
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if UIDevice.currentDevice().supportsVibration
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{
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UIDevice.currentDevice().vibrate()
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}
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guard let input = input as? ControllerInput else { return }
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print("Activated \(input)")
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switch input
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{
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case ControllerInput.Menu: self.performSegueWithIdentifier("pauseSegue", sender: gameController)
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}
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}
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func gameController(gameController: GameControllerType, didDeactivateInput input: InputType)
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{
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guard let input = input as? ControllerInput else { return }
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print("Deactivated \(input)")
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}
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}
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