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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> |
This is awesome!
Hey jeremy-wagner,
I think you missed an 's'.
PDFJS.disableWorker = true;
I need to convert file given by user without uploading to server
then what will be content of my url?
if I specify local machine path of user then it gives error
please help me
Unreal!
Thank you Dude.
How I can "clean up" the pdfDoc ? I can clean the canvas by clearRect()
It is possible to load a pdf inside a div instead of a canvas?
thank's!!
How can I print my pdf in a printer using pdf.js?
In order to keep text-selection from PDF, this won't be useful right? (since this is using canvas..) Any other workaround for that?
How can i get the page number of the page which is clicked? here is my code
$("div").click(function() { PDFJS.getDocument(url) .then(function(pdf) { pdf.getPage(2).then(function(page) { console.log('pagenum1 = '+page.pageIndex); }); });
How to get HTML5 code from the pdf file?
Hmm ....and how Make this with jQuery and Modal Boostrap?
Using this snippet the pages of my PDF are not rendering in chronogical order, the first page that is ready is rendering first so the pdf order is kinda random. Any trick to avoid this behaviour ?
my terrible fix for my issue with pdf pages rendering in wrong order. The use of interval make it longer to render, if someone has a better fix i'll take it
function renderPages(pdfDoc) {
var maxIterations = pdfDoc.numPages + 1;
var intervalIterator = 1;
var i = window.setInterval(function(){
pdfDoc.getPage(intervalIterator).then(renderPage);
intervalIterator += 1;
if(maxIterations == intervalIterator){
window.clearInterval(i);
}
},50);
}
my terrible fix for my issue with pdf pages rendering in wrong order. The use of interval make it longer to render, if someone has a better fix i'll take it
@SupFrig
The issue is that all pages are rendered simultaneously. To render them in order, you could use ES6 Promises or a promise library like kriskowal's Q.
An example implementation would be:
// [...] renderPage implementation stays the same
var renderPageFactory = function (pdfDoc, num) {
return function () {
return pdfDoc.getPage(num).then(renderPage);
};
};
var renderPages = function (pdfDoc) {
var renderedPage = $q.resolve();
for (var num = 1; num <= pdfDoc.numPages; num++) {
// Wait for the last page t render, then render the next
renderedPage = renderedPage.then(renderPageFactory(pdfDoc, num));
}
};
my terrible fix for my issue with pdf pages rendering in wrong order. The use of interval make it longer to render, if someone has a better fix i'll take it
I found another solution.
First, I create my canvas and then I render the page passing the canvas as argument. That way, you get all canvas ordered and you load the page in the right canvas !
Here's the code :
function renderPDF (url) {
PDFJS.getDocument(url).then((pdf) => {
for (let i = 1; i <= pdf.numPages; i += 1) {
const canvas = document.createElement('canvas');
/* This indentify the canvas as the location of the page */
canvas.id = i;
document.getElementById('pdf-viewer').appendChild(canvas);
pdf.getPage(i).then((page) => {
renderPage(page, canvas);
}
}
});
}
renderPage(page, canvas) {
const viewport = page.getViewport(1);
const canvasContext = canvas.getContext('2d');
const renderContext = {
canvasContext,
viewport
};
canvas.height = viewport.height;
canvas.width = viewport.width;
page.render(renderContext);
}
asdasdasd
Couldn't you also use Promise.all()?
renderPages() {
const pagePromises = [];
PDFJS.getDocument(url).then((pdf) => {
for (let i = 1; i <= pdf.numPages; i += 1) {
// Push the promises into promise array
pagePromises.push(pdf.getPage(i));
}
// When loop finishes, call Promise.all() to
// wait until all promises resolve and returns
// results array
Promise.all(pagePromises).then((resultsArr) => {
// render pdf pages
})
});
}
Since the promises are pushed into the promise array in the correct order, they would render in the correct order :)
How can I get an editable PDF in the canvas using pdfjs?
Hi, I have a problem.
index.html:34 Uncaught ReferenceError: PDFJS is not defined at renderPDF (index.html:34) at index.html:43 renderPDF @ index.html:34 (anonymous) @ index.html:43
Line 34:
PDFJS.disableWorker = true;
Here's the code :
<html>
<body>
<!-- really dirty! this is just a test drive ;) -->
<script type="text/javascript" src="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('file.pdf', document.getElementById('holder'));
</script>
</body>
</html>
@WilsonYesidRiveraCasas don't use the unreleased/unstable version 2, please stick to version 1.x
how to add zoom functionality in above mention code so that after zoom it stay on the same page?
is it possible to JUST render specific range or page o a pdf ? like... page 3 to page 6 ?
`
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="pdf.js"></script> <script src="jquery.js"></script>PDF.js 'Hello, world!' example
<script> // If absolute URL from the remote server is provided, configure the CORS // header on that server. var url = 'pdff.pdf'; // Loaded via <script> tag, create shortcut to access PDF.js exports.
var pdfjsLib = window['pdfjs-dist/build/pdf'];
// The workerSrc property shall be specified.
pdfjsLib.GlobalWorkerOptions.workerSrc = 'worker.js';
var loadingTask = pdfjsLib.getDocument(url);
loadingTask.promise.then(function(pdf) {
var __TOTAL_PAGES = pdf.numPages;
// Fetch the first page
var pageNumber = 1;
for( let i=1; i<=__TOTAL_PAGES; i+=1){
var id ='the-canvas'+i;
$('#canvas_div').append("<div style='background-color:gray;text-align: center;padding:20px;' ><canvas calss='the-canvas' id='"+id+"'></canvas></div>");
var canvas = document.getElementById(id);
//var pageNumber = 1;
renderPage(canvas, pdf, pageNumber++, function pageRenderingComplete() {
if (pageNumber > pdf.numPages) {
return;
}
// Continue rendering of the next page
renderPage(canvas, pdf, pageNumber++, pageRenderingComplete);
});
}
});
function renderPage(canvas, pdf, pageNumber, callback) {
pdf.getPage(pageNumber).then(function(page) {
var scale = 1.5;
var viewport = page.getViewport({scale: scale});
var pageDisplayWidth = viewport.width;
var pageDisplayHeight = viewport.height;
//var pageDivHolder = document.createElement();
// Prepare canvas using PDF page dimensions
//var canvas = document.createElement(id);
var context = canvas.getContext('2d');
canvas.width = pageDisplayWidth;
canvas.height = pageDisplayHeight;
// pageDivHolder.appendChild(canvas);
// Render PDF page into canvas context
var renderContext = {
canvasContext: context,
viewport: viewport
};
page.render(renderContext).promise.then(callback);
});
}
</script>
<html>
`
doesn't work with the newest version, 2.6.347
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>
I have followed this exactly and I'm getting an error on the line:
When this line runs I get a 404 Not Found error on "worker.js". I've made sure
is included. Any thoughts?