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82 lines
2.7 KiB
Swift
82 lines
2.7 KiB
Swift
//
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// Atari2600Document.swift
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// Clock Signal
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//
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// Created by Thomas Harte on 16/07/2015.
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// Copyright © 2015 Thomas Harte. All rights reserved.
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//
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import Cocoa
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class Atari2600Document: NSDocument, CSOpenGLViewDelegate, CSAtari2600Delegate {
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override init() {
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super.init()
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// Add your subclass-specific initialization here.
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}
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@IBOutlet weak var openGLView: CSOpenGLView?
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override func windowControllerDidLoadNib(aController: NSWindowController) {
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super.windowControllerDidLoadNib(aController)
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openGLView!.delegate = self
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// bind the content aspect ratio to remain 4:3 from now on
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aController.window!.contentAspectRatio = NSSize(width: 4.0, height: 3.0)
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}
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override class func autosavesInPlace() -> Bool {
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return true
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}
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override var windowNibName: String? {
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// Returns the nib file name of the document
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// If you need to use a subclass of NSWindowController or if your document supports multiple NSWindowControllers, you should remove this property and override -makeWindowControllers instead.
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return "Atari2600Document"
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}
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private var atari2600: CSAtari2600? = nil
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override func dataOfType(typeName: String) throws -> NSData {
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// Insert code here to write your document to data of the specified type. If outError != nil, ensure that you create and set an appropriate error when returning nil.
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// You can also choose to override fileWrapperOfType:error:, writeToURL:ofType:error:, or writeToURL:ofType:forSaveOperation:originalContentsURL:error: instead.
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throw NSError(domain: NSOSStatusErrorDomain, code: unimpErr, userInfo: nil)
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}
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override func readFromData(data: NSData, ofType typeName: String) throws {
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atari2600 = CSAtari2600()
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atari2600!.setROM(data)
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atari2600!.delegate = self
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}
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// MARK: CSOpenGLViewDelegate
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private var lastCycleCount: Int64?
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func openGLView(view: CSOpenGLView!, didUpdateToTime time: CVTimeStamp) {
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// TODO: treat time as a delta from old time, work out how many cycles that is plus error
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// this slightly elaborate dance is to avoid overflow
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let intendedCyclesPerSecond: Int64 = 1194720
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let videoTimeScale64 = Int64(time.videoTimeScale)
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let cycleCountLow = ((time.videoTime % videoTimeScale64) * intendedCyclesPerSecond) / videoTimeScale64
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let cycleCountHigh = (time.videoTime / videoTimeScale64) * intendedCyclesPerSecond
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let cycleCount = cycleCountLow + cycleCountHigh
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if let lastCycleCount = lastCycleCount {
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let elapsedTime = cycleCount - lastCycleCount
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atari2600!.runForNumberOfCycles(Int32(elapsedTime))
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}
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lastCycleCount = cycleCount
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}
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func openGLViewDrawView(view: CSOpenGLView!) {
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atari2600!.draw()
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}
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// MARK: CSAtari2600Delegate
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func atari2600NeedsRedraw(atari2600: CSAtari2600!) {
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openGLView?.needsDisplay = true
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}
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} |