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pdf to image using pdf.js
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| <html> | |
| <body> | |
| <script type="text/javascript" src="//mozilla.github.io/pdf.js/build/pdf.js"></script> | |
| <script type="text/javascript"> | |
| var url = "https://docs.google.com/document/export?format=pdf&id=1ML11ZyyMpnAr6clIAwWrXD53pQgNR-DppMYwt9XvE6s&token=AC4w5Vg7fSWH1Hq0SgNckx4YCvnGPaScyw%3A1423618416864"; | |
| var pages = [], heights = [], width = 0, height = 0, currentPage = 1; | |
| var scale = 1.5; | |
| function draw() { | |
| var canvas = document.createElement('canvas'), ctx = canvas.getContext('2d'); | |
| canvas.width = width; | |
| canvas.height = height; | |
| for(var i = 0; i < pages.length; i++) | |
| ctx.putImageData(pages[i], 0, heights[i]); | |
| document.body.appendChild(canvas); | |
| } | |
| PDFJS.disableWorker = true; // due to CORS | |
| PDFJS.getDocument(url).then(function (pdf) { | |
| getPage(); | |
| function getPage() { | |
| pdf.getPage(currentPage).then(function(page) { | |
| console.log("Printing " + currentPage); | |
| var viewport = page.getViewport(scale); | |
| var canvas = document.createElement('canvas') , ctx = canvas.getContext('2d'); | |
| var renderContext = { canvasContext: ctx, viewport: viewport }; | |
| canvas.height = viewport.height; | |
| canvas.width = viewport.width; | |
| page.render(renderContext).then(function() { | |
| pages.push(ctx.getImageData(0, 0, canvas.width, canvas.height)); | |
| heights.push(height); | |
| height += canvas.height; | |
| if (width < canvas.width) width = canvas.width; | |
| if (currentPage < pdf.numPages) { | |
| currentPage++; | |
| getPage(); | |
| } | |
| else { | |
| draw(); | |
| } | |
| }); | |
| }); | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
Here is a similar function I wrote for pdfs to base64 images. The function returns an array of images depending upon the pdf page length.
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js" integrity="sha512-q+4liFwdPC/bNdhUpZx6aXDx/h77yEQtn4I1slHydcbZK34nLaR3cAeYSJshoxIOq3mjEf7xJE8YWIUHMn+oCQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js" integrity="sha512-BbrZ76UNZq5BhH7LL7pn9A4TKQpQeNCHOo65/akfelcIBbcVvYWOFQKPXIrykE3qZxYjmDX573oa4Ywsc7rpTw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>export async function PDFtoIMG(url) {
return new Promise(async (resolve, reject) => {
const existingPdfBytes = await fetch(url).then(res => res.arrayBuffer())
const fileArray = new Uint8Array(existingPdfBytes);
const doc = await pdfjsLib.getDocument({
data: fileArray,
useSystemFonts: true,
}).promise
console.log('PDFtoIMG: url, doc', url, doc)
const pages = []
const count = 1
for (let i = 1; i < doc.numPages + 1; i++) {
const page = await doc.getPage(i)
const viewport = page.getViewport({scale: 1.5})
const canvas = document.createElement('canvas')
const ctx = canvas.getContext('2d')
canvas.width = viewport.width
canvas.height = viewport.height
const task = page.render({canvasContext: ctx, viewport: viewport})
task.promise.then( () => {
pages.push(canvas.toDataURL())
if (count == doc.numPages) {
resolve(pages)
}
})
}
})
}
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Not working for me either