Re: Size of PDF with lots of images
Simon Sapin <[email protected]>
| Newsgroups | gmane.comp.lib.cairo |
|---|---|
| Message-ID | <[email protected]> |
On 16/01/2014 13:54, Simon Sapin wrote: > Even though PNG also uses deflate, PDF’s encoding is not PNG so the > images are decompressed and re-compressed. I’m not too surprised to see > the size increase. You could try a build of cairo that uses zlib’s > maximum compression level and see what happens. Of course, this is a > compromise with compression speed. Maybe it’s worth adding API to change > this level. The PDF spec also talks about "predictors" that can help with compression. As far as I understand from a quick reading of the code, cairo does not use those. This could be something else to explore to reduce the size of PDF files with images. Cheers, -- Simon Sapin -- cairo mailing list [email protected] http://lists.cairographics.org/mailman/listinfo/cairo