-
Notifications
You must be signed in to change notification settings - Fork 10.6k
Expand file tree
/
Copy pathhelloworld.html
More file actions
71 lines (61 loc) · 2.02 KB
/
helloworld.html
File metadata and controls
71 lines (61 loc) · 2.02 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<title>'Hello, world!' example</title>
</head>
<body>
<h1>'Hello, world!' example</h1>
<canvas id="the-canvas" style="border: 1px solid black; direction: ltr"></canvas>
<script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
<script id="script" type="module">
//
// If absolute URL from the remote server is provided, configure the CORS
// header on that server.
//
const url = "./helloworld.pdf";
//
// The workerSrc property shall be specified.
//
pdfjsLib.GlobalWorkerOptions.workerSrc = "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
//
// Asynchronous download PDF
//
const loadingTask = pdfjsLib.getDocument(url);
const pdf = await loadingTask.promise;
//
// Fetch the first page
//
const page = await pdf.getPage(1);
const scale = 1.5;
const viewport = page.getViewport({ scale });
// Support HiDPI-screens.
const outputScale = window.devicePixelRatio || 1;
//
// Prepare canvas using PDF page dimensions
//
const canvas = document.getElementById("the-canvas");
const context = canvas.getContext("2d");
canvas.width = Math.floor(viewport.width * outputScale);
canvas.height = Math.floor(viewport.height * outputScale);
canvas.style.width = Math.floor(viewport.width) + "px";
canvas.style.height = Math.floor(viewport.height) + "px";
const transform = outputScale !== 1 ? [outputScale, 0, 0, outputScale, 0, 0] : null;
//
// Render PDF page into canvas context
//
const renderContext = {
canvasContext: context,
transform,
viewport,
};
page.render(renderContext);
</script>
<hr />
<h2>JavaScript code:</h2>
<pre id="code"></pre>
<script>
document.getElementById("code").textContent = document.getElementById("script").text;
</script>
</body>
</html>