run.go

package ui

import (
	"log"
	"runtime"

	"github.com/go-gl/gl/v2.1/gl"
	"github.com/go-gl/glfw/v3.1/glfw"
	"github.com/gordonklaus/portaudio"
)

const (
	width  = 256
	height = 240
	scale  = 3
	title  = "NES"
)

func init() {
	// we need a parallel OS thread to avoid audio stuttering
	runtime.GOMAXPROCS(2)

	// we need to keep OpenGL calls on a single thread
	runtime.LockOSThread()
}

func Run(paths []string) {
	// initialize audio
	portaudio.Initialize()
	defer portaudio.Terminate()

	audio := NewAudio()
	if err := audio.Start(); err != nil {
		log.Fatalln(err)
	}
	defer audio.Stop()

	// initialize glfw
	if err := glfw.Init(); err != nil {
		log.Fatalln(err)
	}
	defer glfw.Terminate()

	// create window
	glfw.WindowHint(glfw.ContextVersionMajor, 2)
	glfw.WindowHint(glfw.ContextVersionMinor, 1)
	window, err := glfw.CreateWindow(width*scale, height*scale, title, nil, nil)
	if err != nil {
		log.Fatalln(err)
	}
	window.MakeContextCurrent()

	// initialize gl
	if err := gl.Init(); err != nil {
		log.Fatalln(err)
	}
	gl.Enable(gl.TEXTURE_2D)

	ca1 := NewKeyboardControllerAdapter()
	ca2 := NewDummyControllerAdapter()

	ca1.SetWindow(window)
	ca2.SetWindow(window)

	// run director
	director := NewDirector(window, audio, ca1, ca2)
	director.Start(paths)
}