gradients渐变

http://www.cnblogs.com/zhouchanwen/archive/2012/08/01/2619172.html

> - I am struggling a bit withgradients. I think I get the

color_profile

> bit. What I have trouble

> with is the matrix, and the r1, r2params. I assume the latter are for

> length of total gradient

> from 0.0 center to 1.0 point, but amnot sure...


你可能感兴趣的:(渐变,agg)