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demo of using pdf.js to extract pages to images
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| <script src="http://cdnjs.cloudflare.com/ajax/libs/processing.js/1.4.1/processing-api.min.js"></script><html> | |
| <!-- | |
| Created using jsbin.com | |
| Source can be edited via http://jsbin.com/pdfjs-helloworld-v2/8598/edit | |
| --> | |
| <body> | |
| <canvas id="the-canvas" style="border:1px solid black"></canvas> | |
| <input id='pdf' type='file'/> | |
| <!-- Use latest PDF.js build from Github --> | |
| <script type="text/javascript" src="https://rawgithub.com/mozilla/pdf.js/gh-pages/build/pdf.js"></script> | |
| <script type="text/javascript"> | |
| // | |
| // Disable workers to avoid yet another cross-origin issue (workers need the URL of | |
| // the script to be loaded, and dynamically loading a cross-origin script does | |
| // not work) | |
| // | |
| PDFJS.disableWorker = true; | |
| // | |
| // Asynchronous download PDF as an ArrayBuffer | |
| // | |
| var pdf = document.getElementById('pdf'); | |
| pdf.onchange = function(ev) { | |
| if (file = document.getElementById('pdf').files[0]) { | |
| fileReader = new FileReader(); | |
| fileReader.onload = function(ev) { | |
| console.log(ev); | |
| PDFJS.getDocument(fileReader.result).then(function getPdfHelloWorld(pdf) { | |
| // | |
| // Fetch the first page | |
| // | |
| console.log(pdf) | |
| pdf.getPage(1).then(function getPageHelloWorld(page) { | |
| var scale = 1.5; | |
| var viewport = page.getViewport(scale); | |
| // | |
| // Prepare canvas using PDF page dimensions | |
| // | |
| var canvas = document.getElementById('the-canvas'); | |
| var context = canvas.getContext('2d'); | |
| canvas.height = viewport.height; | |
| canvas.width = viewport.width; | |
| // | |
| // Render PDF page into canvas context | |
| // | |
| var task = page.render({canvasContext: context, viewport: viewport}) | |
| task.promise.then(function(){ | |
| console.log(canvas.toDataURL('image/jpeg')); | |
| }); | |
| }); | |
| }, function(error){ | |
| console.log(error); | |
| }); | |
| }; | |
| fileReader.readAsArrayBuffer(file); | |
| } | |
| } | |
| </script> | |
| <style id="jsbin-css"> | |
| </style> | |
| <script> | |
| </script> | |
| </body> | |
| </html> |
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