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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> |
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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>