I need help - I can help - How to convert RGB to CMYK?

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How to convert RGB to CMYK?

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3688
Printed Date: 04 May 24 at 12:58AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: How to convert RGB to CMYK?

Posted By: Boris26
Subject: How to convert RGB to CMYK?
Date 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?

Replies:

Posted By: Ingo
Date 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...

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Cheers,
Ingo