What C++ library can I use to convert a PDF to an image on windows?

Question

I am working on a project in which I need to analyze images; the primary source of these images is the webcam, but recently we've been ask to add support for uploaded files and scanners. This is fine, for the most part, except they'd like us to be able to use documents in PDF format.

I need a raw pixel bitmap for the processing; on Mac, I can use CoreGraphics to load the PDF into an image buffer, but I'm not sure how to pull this off on Windows.

To summarize: I need a C++ library (preferably with a license like BSD since this is closed-source, but potentially LGPL could work) that I can use to open a PDF file and export each page as a rendered image buffer bitmap.

Answer 1

ImageMagick. Far and away the best library for reading and writing as many formats as possible http://www.imagemagick.org/script/index.php

Answer 2

• With swftools http://wiki.swftools.org/

Example:

pdf2swf --pages 1 -T9 PDF_FILE.pdf -o temp.swf
swfrender temp.swf --output 1.png

• With poppler

Example using Qt http://bit.ly/8UksK6