Java Slick2D Image Glow Effect

Question

How can one achieve a dynamic glow effect in Java Slick2d? I want an image to be surrounded by a glow when I move my mouse over it for example.

Example:

enter image description here No glow

enter image description here Glow

Is it possible to make this programmatically?

Minegeek360 · Answer 1 · 2015-07-29 13:40:58Z

I would suggest just making the image with a glowing effect, but if you must have it done in game then you would:

1) Render your scene or "glow objects" to texture A

2) Bind texture A, then using the horizontal shader, render a quad to texture B

3) Bind texture B, then using the vertical shader, render a quad to texture A

However This requires the following OpenGL extensions:

(You can find the full answer on the website below. The guy there explains it better than me)

1 Answer 1