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ge.go
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ge.go
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package ge
import (
"runtime"
"runtime/debug"
"time"
"github.com/hajimehoshi/ebiten/v2"
"github.com/quasilyte/ge/internal/locales"
)
func InferLanguages() []string {
return locales.InferLanguages()
}
func RunGame(ctx *Context, controller SceneController) error {
g := &gameRunner{
ctx: ctx,
prevTime: time.Now(),
}
if runtime.GOARCH != "wasm" {
ebiten.SetFullscreen(ctx.FullScreen)
}
ctx.firstController = controller
ebiten.SetWindowTitle(ctx.WindowTitle)
ebiten.SetWindowSize(int(ctx.WindowWidth), int(ctx.WindowHeight))
if int(ctx.ScreenWidth) == 0 && int(ctx.ScreenHeight) == 0 {
ctx.ScreenWidth = ctx.WindowWidth
ctx.ScreenHeight = ctx.WindowHeight
}
return rungame(g)
}
type gameRunner struct {
ctx *Context
prevTime time.Time
}
func (g *gameRunner) Update() error {
// A simple case: no panic recovery is enabled.
if g.ctx.NewPanicController == nil {
g.update()
return nil
}
// Need to prepare a recovery point.
defer func() {
v := recover()
if v != nil {
c := g.ctx.NewPanicController(&PanicInfo{
Controller: g.ctx.CurrentScene.controller,
Value: v,
Trace: string(debug.Stack()),
})
g.ctx.ChangeScene(c)
}
}()
g.update()
return nil
}
func (g *gameRunner) update() {
g.ctx.Input.Update()
g.ctx.Audio.Update()
if g.ctx.CurrentScene == nil && g.ctx.firstController != nil {
g.ctx.ChangeScene(g.ctx.firstController)
g.ctx.firstController = nil
}
var delta float64
if fixedDelta := g.ctx.fixedDelta; fixedDelta != 0.0 {
delta = g.ctx.fixedDelta
} else {
now := time.Now()
delta = now.Sub(g.prevTime).Seconds()
g.prevTime = now
}
if g.ctx.nextScene != nil {
g.ctx.CurrentScene = g.ctx.nextScene
g.ctx.nextScene = nil
scene0 := &g.ctx.CurrentScene.subSceneArray[1]
g.ctx.CurrentScene.controller.Init(scene0)
}
g.ctx.CurrentScene.update(delta)
if g.ctx.updateFn != nil {
g.ctx.updateFn(delta)
}
}
func (g *gameRunner) Draw(screen *ebiten.Image) {
g.ctx.Draw(screen)
}
func (g *gameRunner) Layout(outsideWidth, outsideHeight int) (int, int) {
g.ctx.layoutWidth = outsideWidth
g.ctx.layoutHeight = outsideHeight
return int(g.ctx.ScreenWidth), int(g.ctx.ScreenHeight)
}