| <!doctype html> |
| <title></title> |
| <script src="/_pdf_js/pdf.js"></script> |
| <canvas></canvas> |
| <script> |
| function render(pdfData) { |
| return _render(pdfData); |
| } |
| |
| async function _render(pdfData) { |
| let loadingTask = pdfjsLib.getDocument({data: atob(pdfData)}); |
| let pdf = await loadingTask.promise; |
| let rendered = []; |
| for (let pageNumber=1; pageNumber<=pdf.numPages; pageNumber++) { |
| let page = await pdf.getPage(pageNumber); |
| var viewport = page.getViewport({scale: 96./72.}); |
| // Prepare canvas using PDF page dimensions |
| var canvas = document.getElementsByTagName('canvas')[0]; |
| var context = canvas.getContext('2d'); |
| canvas.height = viewport.height; |
| canvas.width = viewport.width; |
| |
| // Render PDF page into canvas context |
| var renderContext = { |
| canvasContext: context, |
| viewport: viewport |
| }; |
| await page.render(renderContext).promise; |
| rendered.push(canvas.toDataURL()); |
| } |
| return rendered; |
| } |
| </script> |
