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129 lines
2.2 KiB
Go
129 lines
2.2 KiB
Go
package emulator
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import (
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"image"
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"image/color"
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"log"
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"sync"
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"golang.org/x/exp/shiny/driver"
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"golang.org/x/exp/shiny/imageutil"
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"golang.org/x/exp/shiny/screen"
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"golang.org/x/mobile/event/paint"
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"golang.org/x/mobile/event/size"
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)
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var (
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black = color.RGBA{0x00, 0x00, 0x00, 0xff}
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red = color.RGBA{0x7f, 0x00, 0x00, 0x7f}
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)
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var margin = 10
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type Emulator struct {
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PixelPitch int
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Gutter int
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Width int
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Height int
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leds []color.Color
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w screen.Window
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isReady bool
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wg sync.WaitGroup
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}
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func (e *Emulator) Init() {
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e.leds = make([]color.Color, 2048)
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e.wg.Add(1)
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go e.init()
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e.wg.Wait()
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}
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func (e *Emulator) init() {
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driver.Main(func(s screen.Screen) {
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var err error
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e.w, err = s.NewWindow(&screen.NewWindowOptions{
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Title: "Basic Shiny Example",
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})
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if err != nil {
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panic(err)
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}
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defer e.w.Release()
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var sz size.Event
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for {
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evn := e.w.NextEvent()
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switch evn := evn.(type) {
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case paint.Event:
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for _, r := range imageutil.Border(sz.Bounds(), margin) {
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e.w.Fill(r, red, screen.Src)
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}
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e.w.Fill(sz.Bounds().Inset(margin), black, screen.Src)
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e.w.Publish()
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if e.isReady {
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continue
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}
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e.Apply(make([]color.Color, 2048))
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e.wg.Done()
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e.isReady = true
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case size.Event:
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sz = evn
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case error:
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log.Print(e)
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}
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}
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})
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}
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func (e *Emulator) Geometry() (width, height int) {
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return e.Width, e.Height
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}
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func (e *Emulator) Apply(leds []color.Color) error {
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defer func() { e.leds = make([]color.Color, 2048) }()
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for col := 0; col < e.Width; col++ {
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for row := 0; row < e.Height; row++ {
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x := col * (e.PixelPitch + e.Gutter)
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y := row * (e.PixelPitch + e.Gutter)
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x += margin * 2
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y += margin * 2
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c := e.At(col + (row * e.Width))
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e.w.Fill(image.Rect(x, y, x+e.PixelPitch, y+e.PixelPitch), c, screen.Over)
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}
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}
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e.w.Publish()
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return nil
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}
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func (e *Emulator) Render() error {
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return e.Apply(e.leds)
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}
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func (e *Emulator) At(position int) color.Color {
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if e.leds[position] == nil {
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return color.Black
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}
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return e.leds[position]
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}
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func (e *Emulator) Set(position int, c color.Color) {
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e.leds[position] = color.RGBAModel.Convert(c)
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}
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func (e *Emulator) Close() error {
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return nil
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}
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