Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
557 views
in Technique[技术] by (71.8m points)

javascript - PDF.js Inserting Images

I've started using PDF.js, an excelent work, by the way.

But now I want to insert an image (from a canvas element) on the pdf page. Here's my code:

var image = myCanvas.getContext('2d').getImageData(0,0,400,300),
doc = new pdf();
doc.setProperties({
    title: fileName,
    author: 'VirtuaLab?',
    creator: 'pdf.js'
});
doc.addPage();
data = doc.output();

But I haven't found anything about inserting images on PDF.js pages.

Maybe doc.image() or doc.addImage?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Disclaimer: I work for Bytescout

Unfortunately PDF.js not working with images and that is why we developed PDF Generator SDK for Javascript (free for non-commercial use) where you can add image (from url or canvas) like this:

// load image from local file
pdf.imageLoadFromUrl('image1.jpg');
// place this mage at given X, Y coordinates on the page
pdf.imagePlace(20, 40);

Important to say that you can face limitation on image size as BytescoutPDF.js may consumes memory to process large image (this issue is caused by the memory limitations for javascript).

However the script should work fine in case you just need to insert logo image or small picture into generated pdf.

UPDATE: the latest version of jsPDF (not to be confused with PDF.js) seems to work with images, see the sample on examples page.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...