Ejemplo: generar una miniatura de pdf usando pf js
function makeThumb(page) {
// draw page to fit into 96x96 canvas
var vp = page.getViewport(1);
var canvas = document.createElement("canvas");
canvas.width = canvas.height = 96;
var scale = Math.min(canvas.width / vp.width, canvas.height / vp.height);
return page.render({canvasContext: canvas.getContext("2d"), viewport: page.getViewport(scale)}).promise.then(function () {
return canvas;
});
}
pdfjsLib.getDocument("https://raw.githubusercontent.com/mozilla/pdf.js/ba2edeae/web/compressed.tracemonkey-pldi-09.pdf").promise.then(function (doc) {
var pages = []; while (pages.length
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