mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
148 lines
5.1 KiB
HTML
148 lines
5.1 KiB
HTML
<!DOCTYPE html>
|
|
<meta charset="utf-8">
|
|
<meta property="og:image" itemprop="image primaryImageOfPage" content="https://hajimehoshi.github.io/ebiten/images/examples/highdpi.png">
|
|
<meta name="description" content="Ebiten example - highdpi">
|
|
<link rel="shortcut icon" href="../favicon.png" type="image/png" >
|
|
<link rel="icon" href="../favicon.png" type="image/png" >
|
|
<title>Ebiten example - highdpi</title>
|
|
|
|
<link rel="stylesheet" href="../stylesheets/bootstrap.min.css">
|
|
<link rel="stylesheet" href="../stylesheets/highlight-github.css">
|
|
<link rel="stylesheet" href="../stylesheets/ebiten.css">
|
|
<script src="../scripts/googleanalytics.js"></script>
|
|
|
|
<nav class="navbar"><div class="container">
|
|
<nav class="d-flex flex-row" style="width: 100%;">
|
|
<div class="nav mr-auto"><a class="navbar-brand" href="../"><img src="../images/logo_white.svg" alt="EBITEN"></a></div>
|
|
<ul class="nav">
|
|
<li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten">GitHub</a></li>
|
|
<li class="nav-item"><a class="nav-link" href="https://godoc.org/github.com/hajimehoshi/ebiten">GoDoc</a></li>
|
|
<li class="nav-item"><a class="nav-link" href="https://github.com/hajimehoshi/ebiten/wiki">Wiki</a>
|
|
<li class="nav-item"><a class="nav-link" href="https://ebiten-playground.github.io/">Playground</a>
|
|
</ul>
|
|
</nav>
|
|
</div></nav>
|
|
|
|
<main><div class="container">
|
|
|
|
<h2>Ebiten example - highdpi</h2>
|
|
<iframe src="highdpi.content.html" width="640" height="480"></iframe>
|
|
<div class="card"><pre class="card-body"><code class="language-go">// +build example
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
_ "image/jpeg"
|
|
"log"
|
|
"net/http"
|
|
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/ebitenutil"
|
|
)
|
|
|
|
var (
|
|
count int
|
|
highDPIImage *ebiten.Image
|
|
highDPIImageCh = make(chan *ebiten.Image)
|
|
)
|
|
|
|
func init() {
|
|
// Licensed under Public Domain
|
|
// https://commons.wikimedia.org/wiki/File:As08-16-2593.jpg
|
|
const url = "https://upload.wikimedia.org/wikipedia/commons/1/1f/As08-16-2593.jpg"
|
|
|
|
// Load the image asynchronously.
|
|
go func() {
|
|
res, err := http.Get(url)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
img, _, err := image.Decode(res.Body)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
eimg, err := ebiten.NewImageFromImage(img, ebiten.FilterDefault)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
highDPIImageCh <- eimg
|
|
close(highDPIImageCh)
|
|
}()
|
|
}
|
|
|
|
func update(screen *ebiten.Image) error {
|
|
if highDPIImage == nil {
|
|
// Use select and 'default' clause for non-blocking receiving.
|
|
select {
|
|
case img := <-highDPIImageCh:
|
|
highDPIImage = img
|
|
default:
|
|
}
|
|
}
|
|
|
|
if ebiten.IsRunningSlowly() {
|
|
return nil
|
|
}
|
|
|
|
if highDPIImage == nil {
|
|
ebitenutil.DebugPrint(screen, "Loading the image...")
|
|
return nil
|
|
}
|
|
|
|
scale := ebiten.DeviceScaleFactor()
|
|
sw, sh := screen.Size()
|
|
|
|
w, h := highDPIImage.Size()
|
|
op := &ebiten.DrawImageOptions{}
|
|
|
|
// Move the images's center to the upper left corner.
|
|
op.GeoM.Translate(float64(-w)/2, float64(-h)/2)
|
|
|
|
// The image is just too big. Adjust the scale.
|
|
op.GeoM.Scale(0.25, 0.25)
|
|
|
|
// Scale the image by the device ratio so that the rendering result can be same
|
|
// on various (diffrent-DPI) environments.
|
|
op.GeoM.Scale(scale, scale)
|
|
|
|
// Move the image's center to the screen's center.
|
|
op.GeoM.Translate(float64(sw)/2, float64(sh)/2)
|
|
|
|
op.Filter = ebiten.FilterLinear
|
|
screen.DrawImage(highDPIImage, op)
|
|
|
|
ebitenutil.DebugPrint(screen, fmt.Sprintf("Device Scale Ratio: %0.2f", scale))
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
const (
|
|
screenWidth = 640
|
|
screenHeight = 480
|
|
)
|
|
|
|
// Pass the invert of scale so that Ebiten's auto scaling by device scale is disabled.
|
|
s := ebiten.DeviceScaleFactor()
|
|
if err := ebiten.Run(update, int(screenWidth*s), int(screenHeight*s), 1/s, "High DPI (Ebiten Demo)"); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
</code></pre></div>
|
|
|
|
</div></main>
|
|
|
|
<footer><div class="container">
|
|
<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>
|
|
</div></footer>
|
|
|
|
<script src="../scripts/highlight.pack.js"></script>
|
|
<script>hljs.initHighlightingOnLoad();</script>
|