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  <h2>Ebiten example - keyboard</h2>
  <iframe src="keyboard.content.html" width="640" height="480"></iframe>
  <pre><code class="language-go">// &#43;build example

package main

import (
        &#34;log&#34;
        &#34;strconv&#34;

        &#34;github.com/hajimehoshi/ebiten&#34;
        &#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
        &#34;github.com/hajimehoshi/ebiten/examples/keyboard/keyboard&#34;
)

const (
        screenWidth  = 320
        screenHeight = 240
)

var keyboardImage *ebiten.Image

func init() {
        var err error
        keyboardImage, _, err = ebitenutil.NewImageFromFile(&#34;_resources/images/keyboard/keyboard.png&#34;, ebiten.FilterNearest)
        if err != nil {
                log.Fatal(err)
        }
}

var keyNames = map[ebiten.Key]string{
        ebiten.KeyBackspace: &#34;BS&#34;,
        ebiten.KeyComma:     &#34;,&#34;,
        ebiten.KeyDelete:    &#34;Del&#34;,
        ebiten.KeyEnter:     &#34;Enter&#34;,
        ebiten.KeyEscape:    &#34;Esc&#34;,
        ebiten.KeyPeriod:    &#34;.&#34;,
        ebiten.KeySpace:     &#34;Space&#34;,
        ebiten.KeyTab:       &#34;Tab&#34;,

        // Arrows
        ebiten.KeyDown:  &#34;Down&#34;,
        ebiten.KeyLeft:  &#34;Left&#34;,
        ebiten.KeyRight: &#34;Right&#34;,
        ebiten.KeyUp:    &#34;Up&#34;,

        // Mods
        ebiten.KeyShift:   &#34;Shift&#34;,
        ebiten.KeyControl: &#34;Ctrl&#34;,
        ebiten.KeyAlt:     &#34;Alt&#34;,
}

type pressedKeysParts []string

func (p pressedKeysParts) Len() int {
        return len(p)
}

func (p pressedKeysParts) Dst(i int) (x0, y0, x1, y1 int) {
        k := p[i]
        r, ok := keyboard.KeyRect(k)
        if !ok {
                return 0, 0, 0, 0
        }
        return r.Min.X, r.Min.Y, r.Max.X, r.Max.Y
}

func (p pressedKeysParts) Src(i int) (x0, y0, x1, y1 int) {
        return p.Dst(i)
}

func update(screen *ebiten.Image) error {
        const offsetX, offsetY = 24, 40
        op := &amp;ebiten.DrawImageOptions{}
        op.GeoM.Translate(offsetX, offsetY)
        op.ColorM.Scale(0.5, 0.5, 0.5, 1)
        if err := screen.DrawImage(keyboardImage, op); err != nil {
                return err
        }

        pressed := []string{}
        for i := 0; i &lt;= 9; i&#43;&#43; {
                if ebiten.IsKeyPressed(ebiten.Key(i) &#43; ebiten.Key0) {
                        pressed = append(pressed, string(i&#43;&#39;0&#39;))
                }
        }
        for c := &#39;A&#39;; c &lt;= &#39;Z&#39;; c&#43;&#43; {
                if ebiten.IsKeyPressed(ebiten.Key(c) - &#39;A&#39; &#43; ebiten.KeyA) {
                        pressed = append(pressed, string(c))
                }
        }
        for i := 1; i &lt;= 12; i&#43;&#43; {
                if ebiten.IsKeyPressed(ebiten.Key(i) &#43; ebiten.KeyF1 - 1) {
                        pressed = append(pressed, &#34;F&#34;&#43;strconv.Itoa(i))
                }
        }
        for key, name := range keyNames {
                if ebiten.IsKeyPressed(key) {
                        pressed = append(pressed, name)
                }
        }

        op = &amp;ebiten.DrawImageOptions{
                ImageParts: pressedKeysParts(pressed),
        }
        op.GeoM.Translate(offsetX, offsetY)
        if err := screen.DrawImage(keyboardImage, op); err != nil {
                return err
        }

        return nil
}

func main() {
        if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Keyboard (Ebiten Demo)&#34;); err != nil {
                log.Fatal(err)
        }
}
</code></pre>

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