iwmlib/pixi/app-resolution.html

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2019-03-21 09:57:27 +01:00
<!doctype html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>PIXI Application Resolution Doctest</title>
<link rel="stylesheet" href="../../lib/3rdparty/highlight/styles/default.css">
<link rel="stylesheet" href="../../css/doctest.css">
<script src="../../lib/3rdparty/highlight/highlight.pack.js"></script>
<script src="../../lib/3rdparty/all.js"></script>
<script src="../all.js"></script>
<script src="./all.js"></script>
<style>
#dpi {
height: 1in;
left: -100%;
position: absolute;
top: -100%;
width: 1in;
}
</style>
</head>
<body onload="Doctest.run()">
<h1>Application Resolution</h1>
<p>
This is a doc test page to examine the width and height of canvas elements at different resolutions.
</p>
<p>Further documentation:</p>
<ul>
<li><a href="https://webglfundamentals.org/webgl/lessons/webgl-resizing-the-canvas.html">WebGL Fundamentals</a></li>
<li><a href="https://www.khronos.org/webgl/wiki/HandlingHighDPI">Handling High DPI</a></li>
</ul>
<p>Device properties:</p>
<ul>
<li id="dpi-result">Your screen has <span></span> dpi.</li>
<li id="dpr-result">Your screen has a device-pixel-ratio of <span></span>.</li>
</ul>
<p>
Set width and height per CSS: <input type="checkbox" />
</p>
<script>
let scaled = false
$('input[type="checkbox"]').click(function(e) {
if ($(this).prop('checked')) {
$('#canvas1').css({width: '100px', height: '100px'})
$('#canvas2').css({width: '100px', height: '100px'})
$('#canvas3').css({width: '100px', height: '100px'})
$('#canvas4').css({width: '100px', height: '100px'})
} else {
$('#canvas1').css({width: 'auto', height: 'auto'})
$('#canvas2').css({width: 'auto', height: 'auto'})
$('#canvas3').css({width: 'auto', height: 'auto'})
$('#canvas4').css({width: 'auto', height: 'auto'})
}
})
</script>
<p>Let's look at some canvas resolution examples:</p>
<div id="dpi"></div>
<script>
$('#dpi-result span').text(document.getElementById("dpi").offsetHeight)
$('#dpr-result span').text(window.devicePixelRatio)
</script>
<script>
const style = new PIXI.TextStyle({
fontStyle: 'italic',
fontWeight: 'bold',
fill: ['#ffffff', '#00ff99'],
stroke: '#4a1850',
strokeThickness: 5,
wordWrap: true,
wordWrapWidth: 440
})
</script>
<canvas id="canvas1" class="interactive"></canvas>
<script class="doctest">
const app1 = new PIXI.Application({width: 100, height: 100, resolution: 1, backgroundColor : 0xf8ce2d, view: canvas1})
const text11 = new PIXI.Text('AaBb12')
const text12 = new PIXI.Text('IWM', style)
text12.y = 30
app1.stage.addChild(text11, text12)
</script>
<canvas id="canvas2" class="interactive"></canvas>
<script class="doctest">
const app2 = new PIXI.Application({width: 100, height: 100, resolution: 2, backgroundColor : 0xfd6b6a, view: canvas2})
const text21 = new PIXI.Text('AaBb12')
const text22 = new PIXI.Text('IWM', style)
text22.y = 30
app2.stage.addChild(text21, text22)
</script>
<canvas id="canvas3" class="interactive"></canvas>
<script class="doctest">
const app3 = new PIXI.Application({width: 100, height: 100, resolution: 3, backgroundColor : 0x40c3f2, view: canvas3})
const text31 = new PIXI.Text('AaBb12')
const text32 = new PIXI.Text('IWM', style)
text32.y = 30
app3.stage.addChild(text31, text32)
</script>
<canvas id="canvas4" class="interactive"></canvas>
<script class="doctest">
const app4 = new PIXI.Application({width: 100, height: 100, resolution: window.devicePixelRatio, backgroundColor : 0xd7a3f9, view: canvas4})
const text41 = new PIXI.Text('AaBb12')
const text42 = new PIXI.Text('IWM', style)
text42.y = 30
app4.stage.addChild(text41, text42)
</script>
</body>