Created
August 9, 2012 02:16
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How to render a full PDF using Mozilla's pdf.js
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| <html> | |
| <body> | |
| <!-- really dirty! this is just a test drive ;) --> | |
| <script type="text/javascript" src="https://raw.github.com/mozilla/pdf.js/gh-pages/build/pdf.js"></script> | |
| <script type="text/javascript"> | |
| function renderPDF(url, canvasContainer, options) { | |
| var options = options || { scale: 1 }; | |
| function renderPage(page) { | |
| var viewport = page.getViewport(options.scale); | |
| var canvas = document.createElement('canvas'); | |
| var ctx = canvas.getContext('2d'); | |
| var renderContext = { | |
| canvasContext: ctx, | |
| viewport: viewport | |
| }; | |
| canvas.height = viewport.height; | |
| canvas.width = viewport.width; | |
| canvasContainer.appendChild(canvas); | |
| page.render(renderContext); | |
| } | |
| function renderPages(pdfDoc) { | |
| for(var num = 1; num <= pdfDoc.numPages; num++) | |
| pdfDoc.getPage(num).then(renderPage); | |
| } | |
| PDFJS.disableWorker = true; | |
| PDFJS.getDocument(url).then(renderPages); | |
| } | |
| </script> | |
| <div id="holder"></div> | |
| <script type="text/javascript"> | |
| renderPDF('sample.pdf', document.getElementById('holder')); | |
| </script> | |
| </body> | |
| </html> |
It`s working now
<div id="my_canvas"></div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/build/pdf.min.js" />
<script>
function renderPDF(url, canvasContainer) {
function renderPage(page) {
let viewport = page.getViewport({scale: .5})
const DPI = 72;
const PRINT_OUTPUT_SCALE = DPI/72;
const scale = canvasContainer.clientWidth / viewport.width;
const canvas = document.createElement('canvas')
const ctx = canvas.getContext('2d')
viewport = page.getViewport({scale})
canvas.width = Math.floor(viewport.width * PRINT_OUTPUT_SCALE);
canvas.height = Math.floor(viewport.height * PRINT_OUTPUT_SCALE);
canvas.style.width = '100%';
canvas.style.transform = 'scale(1,1)';
canvas.style.transformOrigin = '0% 0%';
const canvasWrapper = document.createElement('div');
canvasWrapper.style.width = '100%';
canvasWrapper.style.height = '100%';
canvasWrapper.appendChild(canvas);
const renderContext = {
canvasContext: ctx,
viewport,
}
canvasContainer.appendChild(canvasWrapper)
page.render(renderContext)
}
function renderPages(pdfDoc) {
for (let num = 1; num <= pdfDoc.numPages; num += 1)
pdfDoc.getPage(num).then(renderPage)
}
pdfjsLib.disableWorker = true
pdfjsLib.getDocument(url).promise.then(renderPages)
}
renderPDF('../files/test.pdf', document.getElementById('my_canvas')) //div element
</script>
thanks @levenokk
Thank you @levenokk
how to add zoom functionality in above mention code so that after zoom it stay on the same page?
add html zoom
<div id="zoom_controls">
<button id="zoom_in">+</button>
<button id="zoom_out">-</button>
</div>
<script> document.getElementById('zoom_in').addEventListener('click', (e) => { if(options.scale < 4) { options.scale += 0.5; document.querySelector("#holder").style.zoom = options.scale; } }); document.getElementById('zoom_out').addEventListener('click', (e) => { if(options.scale > 1) { options.scale -= 0.5; document.querySelector("#holder").style.zoom = options.scale; } }); </script>
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doesn't work with the newest version, 2.6.347