mirror of
https://github.com/Candygoblen123/SwiftNES.git
synced 2024-09-19 17:01:01 -05:00
92 lines
2.8 KiB
Swift
92 lines
2.8 KiB
Swift
// The Swift Programming Language
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// https://docs.swift.org/swift-book
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import SDL
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import Foundation
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guard SDL_Init(SDL_INIT_VIDEO) == 0 else {
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fatalError("SDL could not initialize! SDL_Error: \(String(cString: SDL_GetError()))")
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}
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let window = SDL_CreateWindow(
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"SwiftNES",
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Int32(SDL_WINDOWPOS_CENTERED_MASK), Int32(SDL_WINDOWPOS_CENTERED_MASK),
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Int32(256.0 * 3.0), Int32(240.0 * 3.0),
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SDL_WINDOW_SHOWN.rawValue)
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let canvas = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC.rawValue)
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SDL_RenderSetScale(canvas, 3.0, 3.0)
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var texture = SDL_CreateTexture(canvas, SDL_PIXELFORMAT_RGB24.rawValue, Int32(SDL_TEXTUREACCESS_TARGET.rawValue), 256, 240)
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var event = SDL_Event()
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guard let bytes = NSData(contentsOfFile: "pacman.nes") else { fatalError("Rom not found") }
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var gameCode = [UInt8](repeating: 0, count: bytes.length)
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bytes.getBytes(&gameCode, length: bytes.length)
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let rom = try Rom(gameCode)
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let joypad1 = Joypad()
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let keyMap = [
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SDLK_DOWN : JoypadButton.DOWN,
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SDLK_UP : JoypadButton.UP,
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SDLK_LEFT : JoypadButton.LEFT,
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SDLK_RIGHT : JoypadButton.RIGHT,
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SDLK_SPACE : JoypadButton.SELECT,
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SDLK_RETURN : JoypadButton.START,
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SDLK_a : JoypadButton.BUTTON_A,
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SDLK_s : JoypadButton.BUTTON_B
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]
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var frame = Frame()
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let time: UnsafeMutablePointer<timespec> = UnsafeMutablePointer<timespec>.allocate(capacity: 1)
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clock_gettime(CLOCK_REALTIME, time)
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time.pointee.tv_nsec += Int(0.01666 * 1000000000)
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let bus = Bus(rom: rom, joypad1: joypad1) { ppu in
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Render.render(ppu, frame: frame)
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//wait here until 16.66 ms have passed
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clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, time, nil)
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var nextNSec = time.pointee.tv_nsec + Int(0.01666 * 1000000000)
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if nextNSec > 999999999 {
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nextNSec -= 999999999
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time.pointee.tv_sec += 1
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}
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time.pointee.tv_nsec = nextNSec
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SDL_UpdateTexture(texture, nil, frame.data, 256 * 3)
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SDL_RenderCopy(canvas, texture, nil, nil)
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SDL_RenderPresent(canvas)
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while SDL_PollEvent(&event) > 0 {
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if event.type == SDL_QUIT.rawValue {
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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}
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if event.type == SDL_KEYDOWN.rawValue {
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let keyCode = SDL_KeyCode(UInt32(event.key.keysym.sym))
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switch keyCode {
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case SDLK_ESCAPE:
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SDL_DestroyWindow(window)
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SDL_Quit()
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exit(0)
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default:
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guard let key = keyMap[keyCode] else { continue }
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joypad1.setButton(key, pressed: true)
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}
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}
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if event.type == SDL_KEYUP.rawValue {
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guard let key = keyMap[SDL_KeyCode(UInt32(event.key.keysym.sym))] else { continue }
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joypad1.setButton(key, pressed: false)
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}
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}
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}
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let cpu = CPU(bus: bus)
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cpu.reset()
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cpu.run()
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time.deallocate()
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