On 19 May 2011, at 18:59, CIB wrote: > Those function names make me guess that a lot of time is wasted converting > the image. I also don't need full alpha transparency in a lot of cases, > color-keyed transparency would do just fine. Would there be a way to speed up > drawing through that?
Alpha blending is never going to be cheap because you have to composite every pixel with whatever is there already... If you are OK with a simpler "barn door" mask approach, then using another image format might help - I think (it's been a while) that if you use XPM images that have a simple transparency, then it may all be a lot quicker. (That might be true for GIF too, actually, though I am not certain...) Anyway, I'd try it with XPM images instead and see if that improves things - looks like you are on a linux host anyway so converting the images to XPM's should be trivial, though what will happen to your existing alpha channel I'm not sure. The Gimp'll know what to do I guess. _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
