ebiten/docs/examples/alphablending.html

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<!DOCTYPE html>
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<meta charset="utf-8">
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<meta property="og:image" itemprop="image primaryImageOfPage" content="https://hajimehoshi.github.io/ebiten/images/examples/alphablending.png">
<meta name="description" content="Ebiten example - alphablending">
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<title>Ebiten example - alphablending</title>
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<main><div class="container">
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<h2>Ebiten example - alphablending</h2>
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<iframe src="alphablending.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/color&#34;
_ &#34;image/png&#34;
&#34;log&#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
ebitenImage *ebiten.Image
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)
func update(screen *ebiten.Image) error {
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count&#43;&#43;
count %= ebiten.FPS * 10
diff := float64(count) * 0.2
switch {
case 480 &lt; count:
diff = 0
case 240 &lt; count:
diff = float64(480-count) * 0.2
}
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if ebiten.IsRunningSlowly() {
return nil
}
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screen.Fill(color.NRGBA{0x00, 0x00, 0x80, 0xff})
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// Draw 100 Ebitens
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op := &amp;ebiten.DrawImageOptions{}
op.ColorM.Scale(1.0, 1.0, 1.0, 0.5)
for i := 0; i &lt; 10*10; i&#43;&#43; {
op.GeoM.Reset()
x := float64(i%10)*diff &#43; 15
y := float64(i/10)*diff &#43; 20
op.GeoM.Translate(x, y)
screen.DrawImage(ebitenImage, op)
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}
return nil
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}
func main() {
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var err error
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ebitenImage, _, err = ebitenutil.NewImageFromFile(ebitenutil.JoinStringsIntoFilePath(&#34;_resources&#34;, &#34;images&#34;, &#34;ebiten.png&#34;), ebiten.FilterNearest)
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if err != nil {
log.Fatal(err)
}
if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Alpha Blending (Ebiten Demo)&#34;); err != nil {
log.Fatal(err)
}
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}
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</code></pre></div>
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</div></main>
<footer><div class="container">
<p>© 2013 Hajime Hoshi</p>
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<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>
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<p>The content of this page is licensed under <a href="https://creativecommons.org/licenses/by/4.0/">the Creative Commons Attribution 4.0 License</a>.</p>
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