HTML Logo by World Wide Web Consortium ( Click to learn more about our commitment to accessibility and standards.

Moving forward with Composr

ocPortal has been relaunched as Composr CMS. ocPortal 9 is superseded by Composr 10.

Head over to for our new site, and to our migration roadmap. Existing ocPortal member accounts have been mirrored.

Alpha blending in PHP using GD: pitfalls to avoid (#news_218) - Comments

Login / Search

 [ Join | More ]

Alpha blending in PHP using GD: pitfalls to avoid

Posted 08 December 2010, 10:09 PM

This is a quick blog post for programmers working with PHP alpha blending. There is a lack of clear guidance on this subject and there are a number of stumbling blocks. I'm simply going to list things programmers need to be aware of:

  • GD1 does not support true-color and therefore does not support any alpha blending functions. Be aware of this if you write software you need to run on older web servers.

Read more

There are too many online users to list.
Control functions:

Quick reply   Contract

Your name:
Your message: