I did a quick google for this on the forums, but the last threads I found were pretty old. I then searched for bloom tutorials; most talk about blurring the pixels in colour buffers (which I guess we'd normally just call ALLEGRO_BITMAPs).

Given that this is a relatively common effect these days, I'd be interested to know how the modern Allegro developer - and I'm hoping this term applies to some of you - goes about doing this. Would then be good to get this written up in a tutorial on the wiki.

it won't compile

{"name":"shader.png","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/4\/5\/4507b76a762e8f5d3fd347cd8e05d519.png","w":450,"h":447,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/4\/5\/4507b76a762e8f5d3fd347cd8e05d519"}

Nah, no specific formula - but the general idea is "particularly bright things start to glow".

You can see it around the edges of the silhouetted building here:

{"name":"5knW2iR.jpg","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/7\/b\/7b71ac07d9e0e1e56589c9e22d06ecda.jpg","w":2048,"h":1152,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/7\/b\/7b71ac07d9e0e1e56589c9e22d06ecda"}

Nope, but I'm not personally looking to use bloom for 3D anyway if anything, I just wanted it for a nice effect when my game is either paused or when the level completes. I'm just wondering if anyone happens to have implemented bloom with Allegro and is willing to share their code, mainly because I am a lazy programmer and don't want to do original research.