> Now I use the same fonts to compare them again. Thanks, however...
> Compare them side by side, > CJK: > https://i.imgur.com/eXOpUPN.png ... the font sizes are not identical, unfortunately. Doing a blink comparison of the first body text line (starting with `李') I see that the Linux version is 1ppem smaller. This makes it very hard to exactly compare rendering differences. > Latin: > https://i.imgur.com/3huCFdq.png The same thing. > With the comparisons, you can clearly see the "color" difference > between FreeType and other two. By my eye, it looks like OS X and > MacType both font rendering's "color" have a little bit "red" > inside, or just simply say that looks more "red" (or "purple red") > than Linux. Only Linux font rendering's "color" still looks "blue". > By "color", it's because I still don't know what really called is. > I have been searching a lot of articles about font rendering in the > past week, but none of them can helps me out with this "color" > issue. I was thought that it probably could be "Subpixel rendering" > related, but still not sure. Your guess is right, I believe, being related to the applied subpixel color filter. The original one developed by Microsoft is patented (aka. ClearType), thus not enabled on various GNU/Linux distributions, AFAIK. The legacy color filter that FreeType provides is rather poor, and it seems that nobody has yet come up with a better one for X11. [List readers: In case I'm wrong, please correct me! And I would be really glad if I'm wrong...] > I'm also wondering since MacType is FreeType too, which means that > FreeType can did the right "color" of the font rendering. Maybe they simply using a better color filter. Werner _______________________________________________ Freetype mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/freetype
