mirror of
https://github.com/astefanutti/decktape.git
synced 2024-09-11 14:25:44 +03:00
51 lines
1.5 KiB
HTML
51 lines
1.5 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="UTF-8" />
|
|
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
|
<title>Document</title>
|
|
</head>
|
|
<body>
|
|
<canvas id="the-canvas"></canvas>
|
|
<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.1.81/build/pdf.min.js"></script>
|
|
<script type="module">
|
|
const params = new URLSearchParams(window.location.search);
|
|
const pdf = await pdfjsLib.getDocument(params.get('file')).promise;
|
|
let currentPage = 1;
|
|
await renderPage();
|
|
|
|
window.deck = {
|
|
nextPage: async () => {
|
|
if (currentPage < pdf.numPages) {
|
|
currentPage++;
|
|
await renderPage();
|
|
}
|
|
},
|
|
numPages: pdf.numPages,
|
|
};
|
|
async function renderPage() {
|
|
const page = await pdf.getPage(currentPage);
|
|
const scale = 1.5;
|
|
const viewport = page.getViewport({ scale: scale });
|
|
// Support HiDPI-screens.
|
|
const outputScale = window.devicePixelRatio || 1;
|
|
|
|
const canvas = document.getElementById("the-canvas");
|
|
const canvasContext = 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;
|
|
|
|
await page.render({ canvasContext, transform, viewport })
|
|
.promise;
|
|
}
|
|
</script>
|
|
</body>
|
|
</html>
|