Linked by Eugenia Loli on Wed 23rd Mar 2005 23:18 UTC, submitted by adel
X11, Window Managers Seth Nickell posted some screenshots and videos showing the experimental Luminocity window manager & Cairo which enable a XOrg-based desktop to get accelerated GL eye candy graphics. update: more here.
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gamma correct arithmetics
by Anonymous on Thu 24th Mar 2005 09:56 UTC

EVAS, RENDER, etc.. all perform wrong arithmetics on colors. They all assume RGB is brightness so add, div, etc direct on precorrected values. it is fast but wrong. You must do gamma convertion, do what you need ( mul/div/add ...) and do inverse gamma correction exactly before write to frame buffer.