ebiten/docs/examples/hue.html

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<!DOCTYPE html>
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<title>Ebiten example - hue</title>
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<main><div class="container">
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<h2>Ebiten example - hue</h2>
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<iframe src="hue.content.html" width="640" height="480"></iframe>
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<div class="card"><pre class="card-body"><code class="language-go">// &#43;build example
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package main
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import (
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_ &#34;image/jpeg&#34;
&#34;log&#34;
&#34;math&#34;
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&#34;github.com/hajimehoshi/ebiten&#34;
&#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
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)
const (
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screenWidth = 320
screenHeight = 240
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)
var (
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count int
gophersImage *ebiten.Image
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)
func update(screen *ebiten.Image) error {
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count&#43;&#43;
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if ebiten.IsRunningSlowly() {
return nil
}
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w, h := gophersImage.Size()
op := &amp;ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(screenWidth-w)/2, float64(screenHeight-h)/2)
op.ColorM.RotateHue(float64(count%360) * 2 * math.Pi / 360)
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screen.DrawImage(gophersImage, op)
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return nil
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}
func main() {
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var err error
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gophersImage, _, err = ebitenutil.NewImageFromFile(ebitenutil.JoinStringsIntoFilePath(&#34;_resources&#34;, &#34;images&#34;, &#34;gophers.jpg&#34;), ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Hue (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
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}
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</code></pre></div>
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