ebiten/docs/examples/font.html
2016-09-03 01:55:07 +09:00

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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
}
return textImage.ReplacePixels(dst.Pix)
}
func update(screen *ebiten.Image) error {
if err := screen.DrawImage(textImage, &amp;ebiten.DrawImageOptions{}); err != nil {
return err
}
return nil
}
func main() {
var err error
textImage, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
if err != nil {
log.Fatal(err)
}
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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