http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 07:47:03 +0000 Wed, 27 Mar 2019 20:58:41 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=3688 http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ http://www.quickpdf.org/forum/how-to-convert-rgb-to-cmyk_topic3688_post14709.html#14709 Author: Ingo
Subject: 3688
Posted: 27 Mar 19 at 8:58PM

Hi Boris,

converting RGB-to CMYK-values (or the other way round) isn't possible with QuickPDF.
Sorry...

]]> Wed, 27 Mar 2019 20:58:41 +0000 http://www.quickpdf.org/forum/how-to-convert-rgb-to-cmyk_topic3688_post14709.html#14709 http://www.quickpdf.org/forum/how-to-convert-rgb-to-cmyk_topic3688_post14704.html#14704 Author: Boris26
Subject: 3688
Posted: 27 Mar 19 at 10:33AM

I creates PDF files by means of the Cairo library from GTK+. No jpeg images, just text and simple figures (rectangles, lines, circles, etc.) inside PDF documents. The Cairo API supports RGB colors only.

Now I need to use CMYK colors to my PDF files. So, my question: is it possible to convert RGB colors to CMYK colors in existing PDF files (by using of Debenu Quick PDF Library)? Get every object in a PDF document one by one, get their RGB colors, convert to CMYK and save the result. If it's possible, how to do this?
]]> Wed, 27 Mar 2019 10:33:46 +0000 http://www.quickpdf.org/forum/how-to-convert-rgb-to-cmyk_topic3688_post14704.html#14704