ebiten/docs/examples/font.html

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

package main

import (
        &#34;image&#34;
        &#34;io/ioutil&#34;
        &#34;log&#34;

        &#34;github.com/golang/freetype/truetype&#34;
        &#34;github.com/hajimehoshi/ebiten&#34;
        &#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
        &#34;golang.org/x/image/font&#34;
        &#34;golang.org/x/image/math/fixed&#34;
)

const (
        screenWidth  = 640
        screenHeight = 480
)

var (
        textImage *ebiten.Image
)

var text = []string{
        &#34;The quick brown fox jumps over the lazy dog.&#34;,
        &#34;&#34;,
        // A head part of a Japanese novel 山月記 (Sangetsuki)
        // See http://www.aozora.gr.jp/cards/000119/files/624_14544.html.
        &#34;隴西の李徴は博学才穎、天宝の末年、&#34;,
        &#34;若くして名を虎榜に連ね、&#34;,
        &#34;ついで江南尉に補せられたが、&#34;,
        &#34;性、狷介、自ら恃むところ頗厚く、&#34;,
        &#34;賤吏に甘んずるを潔しとしなかった。&#34;,
}

func parseFont() error {
        f, err := ebitenutil.OpenFile(&#34;_resources/fonts/mplus-1p-regular.ttf&#34;)
        if err != nil {
                return err
        }
        defer func() {
                _ = f.Close()
        }()
        b, err := ioutil.ReadAll(f)
        if err != nil {
                return err
        }
        tt, err := truetype.Parse(b)
        if err != nil {
                return err
        }
        w, h := textImage.Size()
        dst := image.NewRGBA(image.Rect(0, 0, w, h))
        const size = 24
        const dpi = 72
        d := &amp;font.Drawer{
                Dst: dst,
                Src: image.White,
                Face: truetype.NewFace(tt, &amp;truetype.Options{
                        Size:    size,
                        DPI:     dpi,
                        Hinting: font.HintingFull,
                }),
        }
        y := size
        for _, s := range text {
                d.Dot = fixed.P(0, y)
                d.DrawString(s)
                y &#43;= size
        }
        textImage.ReplacePixels(dst.Pix)
        return nil
}

func update(screen *ebiten.Image) error {
        if ebiten.IsRunningSlowly() {
                return nil
        }
        screen.DrawImage(textImage, &amp;ebiten.DrawImageOptions{})
        return nil
}

func main() {
        textImage, _ = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
        if err := parseFont(); err != nil {
                log.Fatal(err)
        }
        if err := ebiten.Run(update, screenWidth, screenHeight, 1, &#34;Font (Ebiten Demo)&#34;); err != nil {
                log.Fatal(err)
        }
}
</code></pre>

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  <p>© 2013 Hajime Hoshi</p>
  <p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>
  <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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doc: Add new examples 2016-04-13 18:26:31 +02:00			`<!DOCTYPE html>`
doc: Force HTTPS 2016-08-27 17:58:27 +02:00			`<script src="../scripts/force-https.js"></script>`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`<link rel="shortcut icon" href="../favicon.png" type="image/png" >`
			`<link rel="icon" href="../favicon.png" type="image/png" >`
			`<title>Ebiten example - font</title>`
doc: Use relative path 2016-08-27 17:48:15 +02:00			`<link rel="stylesheet" href="../stylesheets/bootstrap.min.css">`
			`<link rel="stylesheet" href="../stylesheets/highlight-github.css">`
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doc: Bug fix: wrong path 2016-09-02 18:55:07 +02:00			`<script src="../scripts/googleanalytics.js"></script>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00
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doc: Use relative path 2016-08-27 17:48:15 +02:00			`<a class="navbar-brand" href="..">Ebiten</a>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`</div>`
doc: Fix thumbnail size 2016-08-26 19:37:08 +02:00			`<nav class="collapse navbar-collapse">`
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doc: Force HTTPS 2016-08-27 17:58:27 +02:00			`<li><a href="https://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>`
doc: Fix thumbnail size 2016-08-26 19:37:08 +02:00			`<li><a href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>`
			`</ul>`
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doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`</header>`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<main><div class="container">`

doc: Adjust fonts 2016-08-26 20:18:16 +02:00			`<h2>Ebiten example - font</h2>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<iframe src="font.content.html" width="640" height="480"></iframe>`
doc: Highlight code 2016-08-27 07:00:06 +02:00			`<pre><code class="language-go">// +build example`
doc: go generate; Add style.css 2016-08-26 16:33:36 +02:00
			`package main`
doc: Add new examples 2016-04-13 18:26:31 +02:00
			`import (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`"image"`
			`"io/ioutil"`
			`"log"`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`"github.com/golang/freetype/truetype"`
			`"github.com/hajimehoshi/ebiten"`
			`"github.com/hajimehoshi/ebiten/ebitenutil"`
			`"golang.org/x/image/font"`
			`"golang.org/x/image/math/fixed"`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`const (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`screenWidth = 640`
			`screenHeight = 480`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`var (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`textImage *ebiten.Image`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`var text = []string{`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`"The quick brown fox jumps over the lazy dog.",`
			`"",`
			`// A head part of a Japanese novel 山月記 (Sangetsuki)`
			`// See http://www.aozora.gr.jp/cards/000119/files/624_14544.html.`
			`"隴西の李徴は博学才穎、天宝の末年、",`
			`"若くして名を虎榜に連ね、",`
			`"ついで江南尉に補せられたが、",`
			`"性、狷介、自ら恃むところ頗厚く、",`
			`"賤吏に甘んずるを潔しとしなかった。",`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func parseFont() error {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`f, err := ebitenutil.OpenFile("_resources/fonts/mplus-1p-regular.ttf")`
			`if err != nil {`
			`return err`
			`}`
			`defer func() {`
			`_ = f.Close()`
			`}()`
			`b, err := ioutil.ReadAll(f)`
			`if err != nil {`
			`return err`
			`}`
			`tt, err := truetype.Parse(b)`
			`if err != nil {`
			`return err`
			`}`
			`w, h := textImage.Size()`
			`dst := image.NewRGBA(image.Rect(0, 0, w, h))`
			`const size = 24`
			`const dpi = 72`
			`d := &font.Drawer{`
			`Dst: dst,`
			`Src: image.White,`
			`Face: truetype.NewFace(tt, &truetype.Options{`
			`Size: size,`
			`DPI: dpi,`
			`Hinting: font.HintingFull,`
			`}),`
			`}`
			`y := size`
			`for _, s := range text {`
			`d.Dot = fixed.P(0, y)`
			`d.DrawString(s)`
			`y += size`
			`}`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`textImage.ReplacePixels(dst.Pix)`
			`return nil`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func update(screen *ebiten.Image) error {`
doc: Update examples (#354) 2017-05-16 03:38:34 +02:00			`if ebiten.IsRunningSlowly() {`
			`return nil`
			`}`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`screen.DrawImage(textImage, &ebiten.DrawImageOptions{})`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`return nil`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func main() {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`textImage, _ = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if err := parseFont(); err != nil {`
			`log.Fatal(err)`
			`}`
			`if err := ebiten.Run(update, screenWidth, screenHeight, 1, "Font (Ebiten Demo)"); err != nil {`
			`log.Fatal(err)`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
			`</code></pre>`

doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`</div></main>`

			`<footer><div class="container">`
			`<p>© 2013 Hajime Hoshi</p>`
doc: Add 'the' 2016-08-28 00:10:41 +02:00			`<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<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>`
			`</div></footer>`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Use relative path 2016-08-27 17:48:15 +02:00			`<script src="../scripts/highlight.pack.js"></script>`
doc: Highlight code 2016-08-27 07:00:06 +02:00			`<script>hljs.initHighlightingOnLoad();</script>`