Move ui_*.go back to internal/ui again

gamecontext.go

@@ -15,12 +15,24 @@
 package ebiten
 
 import (
+	"github.com/hajimehoshi/ebiten/internal/audio"
 	"github.com/hajimehoshi/ebiten/internal/graphics"
 	"github.com/hajimehoshi/ebiten/internal/graphics/internal/opengl"
 	"github.com/hajimehoshi/ebiten/internal/ui"
 	"image"
 )
 
+var glContext *opengl.Context
+
+func init() {
+	ui.Init()
+	ui.ExecOnUIThread(func() {
+		glContext = opengl.NewContext()
+	})
+	audio.Init()
+	audio.Start()
+}
+
 // IsKeyPressed returns a boolean indicating whether key is pressed.
 func IsKeyPressed(key Key) bool {
 	return ui.IsKeyPressed(ui.Key(key))

graphicscontext.go

@@ -17,8 +17,15 @@ package ebiten
 import (
 	"github.com/hajimehoshi/ebiten/internal/graphics"
 	"github.com/hajimehoshi/ebiten/internal/graphics/internal/opengl"
+	"github.com/hajimehoshi/ebiten/internal/ui"
 )
 
+func useGLContext(f func(*opengl.Context)) {
+	ui.ExecOnUIThread(func() {
+		f(glContext)
+	})
+}
+
 func newGraphicsContext(c *opengl.Context, screenWidth, screenHeight, screenScale int) (*graphicsContext, error) {
 	f, err := graphics.NewZeroFramebuffer(c, screenWidth*screenScale, screenHeight*screenScale)
 	if err != nil {

internal/audio/audio_js.go

@@ -50,6 +50,11 @@ func audioProcess(channel int) func(e js.Object) {
 }
 
 func initialize() {
+	// Do nothing in node.js.
+	if js.Global.Get("require") != js.Undefined {
+		return
+	}
+
 	context = js.Global.Get("AudioContext").New()
 	// TODO: ScriptProcessorNode will be replaced with Audio WebWorker.
 	// https://developer.mozilla.org/ja/docs/Web/API/ScriptProcessorNode

internal/audio/audio_openal.go

@@ -40,6 +40,7 @@ func toBytes(l, r []int16) []byte {
 }
 
 func initialize() {
+	// Creating OpenAL device must be done after initializing UI. I'm not sure the reason.
 	ch := make(chan struct{})
 	go func() {
 		runtime.LockOSThread()

internal/graphics/internal/opengl/context_js.go

@@ -66,7 +66,27 @@ type context struct {
 
 var lastFramebuffer Framebuffer
 
-func NewContext(gl *webgl.Context) *Context {
+func NewContext() *Context {
+	var gl *webgl.Context
+
+	if js.Global.Get("require") == js.Undefined {
+		// TODO: Define id?
+		canvas := js.Global.Get("document").Call("querySelector", "canvas")
+		var err error
+		gl, err = webgl.NewContext(canvas, &webgl.ContextAttributes{
+			Alpha:              true,
+			PremultipliedAlpha: true,
+		})
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		// Use headless-gl for testing.
+		nodeGl := js.Global.Call("require", "gl")
+		webglContext := nodeGl.Call("createContext", 16, 16)
+		gl = &webgl.Context{Object: webglContext}
+	}
+
 	c := &Context{
 		Nearest:            Filter(gl.NEAREST),
 		Linear:             Filter(gl.LINEAR),

internal/ui/input_glfw.go

@@ -21,7 +21,7 @@ import (
 	"math"
 )
 
-func UpdateInput(window *glfw.Window, scale int) error {
+func updateInput(window *glfw.Window, scale int) error {
 	return currentInput.update(window, scale)
 }
 

internal/ui/ui_glfw.go

@@ -14,30 +14,18 @@
 
 // +build !js
 
-package ebiten
+package ui
 
 import (
 	"fmt"
 	glfw "github.com/go-gl/glfw3"
-	"github.com/hajimehoshi/ebiten/internal/audio"
-	"github.com/hajimehoshi/ebiten/internal/graphics/internal/opengl"
-	"github.com/hajimehoshi/ebiten/internal/ui"
 	"runtime"
 	"time"
 )
 
 var currentUI *userInterface
 
-func useGLContext(f func(*opengl.Context)) {
-	ch := make(chan struct{})
-	currentUI.funcs <- func() {
-		defer close(ch)
-		f(currentUI.glContext)
-	}
-	<-ch
-}
-
-func init() {
+func Init() {
 	runtime.LockOSThread()
 
 	glfw.SetErrorCallback(func(err glfw.ErrorCode, desc string) {
@@ -61,23 +49,48 @@ func init() {
 	go func() {
 		runtime.LockOSThread()
 		u.window.MakeContextCurrent()
-		u.glContext = opengl.NewContext()
 		glfw.SwapInterval(1)
 		for f := range u.funcs {
 			f()
 		}
 	}()
 
-	audio.Init()
-
 	currentUI = u
 }
 
+func ExecOnUIThread(f func()) {
+	ch := make(chan struct{})
+	currentUI.funcs <- func() {
+		defer close(ch)
+		f()
+	}
+	<-ch
+}
+
+func Start(width, height, scale int, title string) (actualScale int, err error) {
+	return currentUI.start(width, height, scale, title)
+}
+
+func Terminate() {
+	currentUI.terminate()
+}
+
+func DoEvents() error {
+	return currentUI.doEvents()
+}
+
+func IsClosed() bool {
+	return currentUI.isClosed()
+}
+
+func SwapBuffers() {
+	currentUI.swapBuffers()
+}
+
 type userInterface struct {
-	window    *glfw.Window
-	scale     int
-	glContext *opengl.Context
-	funcs     chan func()
+	window *glfw.Window
+	scale  int
+	funcs  chan func()
 }
 
 func (u *userInterface) start(width, height, scale int, title string) (actualScale int, err error) {
@@ -122,14 +135,12 @@ func (u *userInterface) start(width, height, scale int, title string) (actualSca
 	windowWidth, _ := window.GetFramebufferSize()
 	actualScale = windowWidth / width
 
-	audio.Start()
-
 	return actualScale, nil
 }
 
 func (u *userInterface) pollEvents() error {
 	glfw.PollEvents()
-	return ui.UpdateInput(u.window, u.scale)
+	return updateInput(u.window, u.scale)
 }
 
 func (u *userInterface) doEvents() error {

internal/ui/ui_js.go

@@ -14,19 +14,38 @@
 
 // +build js
 
-package ebiten
+package ui
 
 import (
 	"github.com/gopherjs/gopherjs/js"
-	"github.com/gopherjs/webgl"
-	"github.com/hajimehoshi/ebiten/internal/audio"
-	"github.com/hajimehoshi/ebiten/internal/graphics/internal/opengl"
-	"github.com/hajimehoshi/ebiten/internal/ui"
 	"strconv"
 )
 
+func ExecOnUIThread(f func()) {
+	f()
+}
+
+func Start(width, height, scale int, title string) (actualScale int, err error) {
+	return currentUI.start(width, height, scale, title)
+}
+
+func Terminate() {
+	currentUI.terminate()
+}
+
+func DoEvents() error {
+	return currentUI.doEvents()
+}
+
+func IsClosed() bool {
+	return currentUI.isClosed()
+}
+
+func SwapBuffers() {
+	currentUI.swapBuffers()
+}
+
 var canvas js.Object
-var context *opengl.Context
 
 type userInterface struct{}
 
@@ -38,10 +57,6 @@ func shown() bool {
 	return !js.Global.Get("document").Get("hidden").Bool()
 }
 
-func useGLContext(f func(*opengl.Context)) {
-	f(context)
-}
-
 func vsync() {
 	ch := make(chan struct{})
 	// TODO: In iOS8, this is called at every 1/30[sec] frame.
@@ -57,7 +72,7 @@ func (*userInterface) doEvents() error {
 	for !shown() {
 		vsync()
 	}
-	ui.CurrentInput().UpdateGamepads()
+	currentInput.UpdateGamepads()
 	return nil
 }
 
@@ -73,12 +88,9 @@ func (*userInterface) swapBuffers() {
 	// Do nothing.
 }
 
-func init() {
+func Init() {
+	// Do nothing in node.js.
 	if js.Global.Get("require") != js.Undefined {
-		// Use headless-gl for testing.
-		nodeGl := js.Global.Call("require", "gl")
-		webglContext := nodeGl.Call("createContext", 16, 16)
-		context = opengl.NewContext(&webgl.Context{Object: webglContext})
 		return
 	}
 
@@ -115,15 +127,6 @@ func init() {
 	canvasStyle := canvas.Get("style")
 	canvasStyle.Set("position", "absolute")
 
-	webglContext, err := webgl.NewContext(canvas, &webgl.ContextAttributes{
-		Alpha:              true,
-		PremultipliedAlpha: true,
-	})
-	if err != nil {
-		panic(err)
-	}
-	context = opengl.NewContext(webglContext)
-
 	// Make the canvas focusable.
 	canvas.Call("setAttribute", "tabindex", 1)
 	canvas.Get("style").Set("outline", "none")
@@ -132,25 +135,25 @@ func init() {
 	canvas.Call("addEventListener", "keydown", func(e js.Object) {
 		e.Call("preventDefault")
 		code := e.Get("keyCode").Int()
-		ui.CurrentInput().KeyDown(code)
+		currentInput.KeyDown(code)
 	})
 	canvas.Call("addEventListener", "keyup", func(e js.Object) {
 		e.Call("preventDefault")
 		code := e.Get("keyCode").Int()
-		ui.CurrentInput().KeyUp(code)
+		currentInput.KeyUp(code)
 	})
 
 	// Mouse
 	canvas.Call("addEventListener", "mousedown", func(e js.Object) {
 		e.Call("preventDefault")
 		button := e.Get("button").Int()
-		ui.CurrentInput().MouseDown(button)
+		currentInput.MouseDown(button)
 		setMouseCursorFromEvent(e)
 	})
 	canvas.Call("addEventListener", "mouseup", func(e js.Object) {
 		e.Call("preventDefault")
 		button := e.Get("button").Int()
-		ui.CurrentInput().MouseUp(button)
+		currentInput.MouseUp(button)
 		setMouseCursorFromEvent(e)
 	})
 	canvas.Call("addEventListener", "mousemove", func(e js.Object) {
@@ -165,14 +168,14 @@ func init() {
 	// TODO: Need to create indimendent touch functions?
 	canvas.Call("addEventListener", "touchstart", func(e js.Object) {
 		e.Call("preventDefault")
-		ui.CurrentInput().MouseDown(0)
+		currentInput.MouseDown(0)
 		touches := e.Get("changedTouches")
 		touch := touches.Index(0)
 		setMouseCursorFromEvent(touch)
 	})
 	canvas.Call("addEventListener", "touchend", func(e js.Object) {
 		e.Call("preventDefault")
-		ui.CurrentInput().MouseUp(0)
+		currentInput.MouseUp(0)
 		touches := e.Get("changedTouches")
 		touch := touches.Index(0)
 		setMouseCursorFromEvent(touch)
@@ -188,8 +191,6 @@ func init() {
 	window.Call("addEventListener", "gamepadconnected", func(e js.Object) {
 		// Do nothing.
 	})
-
-	audio.Init()
 }
 
 func setMouseCursorFromEvent(e js.Object) {
@@ -198,7 +199,7 @@ func setMouseCursorFromEvent(e js.Object) {
 	x, y := e.Get("clientX").Int(), e.Get("clientY").Int()
 	x -= rect.Get("left").Int()
 	y -= rect.Get("top").Int()
-	ui.CurrentInput().SetMouseCursor(x/scale, y/scale)
+	currentInput.SetMouseCursor(x/scale, y/scale)
 }
 
 func devicePixelRatio() int {
@@ -229,7 +230,5 @@ func (*userInterface) start(width, height, scale int, title string) (actualScale
 
 	canvas.Call("focus")
 
-	audio.Start()
-
 	return actualScale, nil
 }

run.go

@@ -17,6 +17,7 @@ package ebiten
 import (
 	"github.com/hajimehoshi/ebiten/internal/audio"
 	"github.com/hajimehoshi/ebiten/internal/graphics/internal/opengl"
+	"github.com/hajimehoshi/ebiten/internal/ui"
 	"time"
 )
 
@@ -37,12 +38,11 @@ func CurrentFPS() float64 {
 // but this is not strictly guaranteed.
 // If you need to care about time, you need to check current time every time f is called.
 func Run(f func(*Image) error, width, height, scale int, title string) error {
-	ui := currentUI
-	actualScale, err := ui.start(width, height, scale, title)
+	actualScale, err := ui.Start(width, height, scale, title)
 	if err != nil {
 		return err
 	}
-	defer ui.terminate()
+	defer ui.Terminate()
 
 	var graphicsContext *graphicsContext
 	useGLContext(func(c *opengl.Context) {
@@ -55,10 +55,10 @@ func Run(f func(*Image) error, width, height, scale int, title string) error {
 	frames := 0
 	t := time.Now().UnixNano()
 	for {
-		if err := ui.doEvents(); err != nil {
+		if err := ui.DoEvents(); err != nil {
 			return err
 		}
-		if ui.isClosed() {
+		if ui.IsClosed() {
 			return nil
 		}
 		if err := graphicsContext.preUpdate(); err != nil {
@@ -72,7 +72,7 @@ func Run(f func(*Image) error, width, height, scale int, title string) error {
 		}
 		// TODO: I'm not sure this is 'Update'. Is 'Tick' better?
 		audio.Update()
-		ui.swapBuffers()
+		ui.SwapBuffers()
 		if err != nil {
 			return err
 		}