[FreeNX-kNX] NX screen refresh performance

[Toni Asensi Esteve]

Chris wrote:

Before adding the new information to the FAQ I would like that we discuss one 
thing:
> RGB is lossless encoding, ie mostly don't compress 
 
> Personally, I find it slower than a steamroller, unless on a LAN link. 
> jpeg is everywhere for a reason !! 
Mmm... I beg to differ, jpeg is not everywhere :-(. You'll see a lot of .png 
files. Apart of being a lossless compression, the reason of using a RGB 
compression is that if you are going to save an image that has not photographs 
nor gradients, for example a screenshot of a simple window of a program... if 
you use a jpeg compresion you'll have a big file and inside the resulting image 
you'll have "blurry text" and "blurry lines". This is because jpeg compresion 
was designed for photographs and similars, not for images that have only text, 
lines, squares and so. For those cases, a png compresion produces smaller 
files.

The JPEG FAQ explains it in http://www.faqs.org/faqs/jpeg-faq/part1 (search 
inside the text "When should I use JPEG, and when should I stick with GIF", 
knowing that the PNG format can represent all the necessary colors, unlike the 
GIF one).

Greetings:
Toni