iwmlib/lib/pixi/deepzoom/image.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>DeepZoomImage Doctests</title>
<link rel="stylesheet" href="../../3rdparty/highlight/styles/default.css">
<link rel="stylesheet" href="../../../css/doctest.css">
<script src="../../3rdparty/highlight/highlight.pack.js"></script>
<script src="../../3rdparty/all.js"></script>
<script src="../../3rdparty/jquery.min.js"></script>
<script src="../../all.js"></script>
<script src="../all.js"></script>
<style>
#app {
display: table;
margin: 0 auto;
}
#app > * {
margin-bottom: 5px;
}
</style>
</head>
<body onload="Doctest.run()">
<h1>DeepZoomImage</h1>
<p>
The main class of a deeply zoomable image that is represented by a hierarchy of tile layers for each zoom level. This gives
the user the impression that even huge pictures (up to gigapixel-images) can be zoomed instantaneously, since the
tiles at smaller levels are scaled immediately and overloaded by more detailed tiles at the larger level as fast
as possible.
</p>
<br />
<div id="app">
<button id="change_dpr">Change Pixel Ratio</button>
<div id="canvas_container"></div>
<div id="info"></div>
</div>
<script class="doctest">
// When an element is added, the ScatterApp wrapps it in it's own Scatter Container.
// Just as in the doctest: scatter.html
class ScatterApp extends PIXIApp {
sceneFactory() {
return new ScatterContainer(this.renderer, { showBounds: true, app: this })
}
}
let app
let state = 0
//Destroys the PIXIApp element and the corresponding canvas,
//to reinstantiate the entire application.
changePIXI()
function changePIXI() {
if (typeof app != 'undefined') {
//The parameter destroys the canvas, when destroying the app.
// Not deleting a new canvas resulted in some
// weird PIXI error.
app.destroy(true)
}
//A new canvas has to be created
//for the new view.
var canvas = document.createElement("canvas")
canvas_container.appendChild(canvas);
app = new ScatterApp({
resolution: state + 1,
//Default parameters
view: canvas,
autoResize: false,
width: 128,
height: 128,
backgroundColor: 0xFFCCCCCC
}).setup().run()
// To create a DeepZoomImage, a DeepZoomInfo has to
// be provided. It contains all the necessary informations
// for the DeepZoomImage, to behave as intended.
// (E.g. that it displays the right level of tiles for the current view distance.)
deepZoomInfo = new DeepZoomInfo(
{
"tileSize": 128,
"format": "jpg",
"overlap": 0,
"type": "map",
"height": 4096,
"width": 4096,
"path": "../assets/maps/test",
"urlTileTemplate": "{path}/{level}/{column}/{row}.{format}"
});
// Create the DeepZoomImage
deepZoomImage = new DeepZoomImage(deepZoomInfo, {
highResolution: !!state,
app
});
deepZoomImage.scatter = new DisplayObjectScatter(deepZoomImage, app.renderer, {
// Allow more flexible scaling for debugging purposes.
minScale: 0,
maxScale: 100,
// Notify the DeepZoomImage, when it's container has
// been transformed (translated, scaled, rotated, ...)
onTransform: (event) => {
deepZoomImage.transformed(event)
}
});
// Add the DeepZoomImage to the scene.
app.scene.addChild(deepZoomImage)
//Set info text.
info.innerHTML = "resolution: " + app._options.resolution +
"<br>high resolution: " + !!state;
}
// Add functionality to the button.
change_dpr.addEventListener("click", (event) => {
state = (state + 1) % 2
changePIXI()
})
</script>
</body>
</html>