Le 05/01/2012 09:40, Olivier Ripoll a écrit :
On 05.01.2012 05:16, Jerry wrote:
Do the developers monitor this list? Or does someone need to file a
bug report for the slow scrolling problem?
Jerry
Yes, they are looking at it. If you look at the thread, you'll see
several names of LyX developers (not exhautively: Pavel Sanda, Richard
Heck, Jean-Marc Lasgouttes, André Pönitz)
The problem is that we have yet to pinpoint the root cause. I see two
major points:
- we have experimental code that seems to improve the situation on
linux. We'll probably learn more once it is deployed to many people. I
am not sure there are plans to port to branch yet. This may be useful
for cases where different people see different speeds.
- there is a part of the code that we know should be rewritten: to
compute metrics (size of words), we work at glyph level, while painting
is done at word level. This is what creates display problems with OS X
when the is kerning/ligatures effects. The "paint single char" pref that
has been discussed makes everything work at glyph level, which is
correct but slow. What we need is to do all at word level (except for
RtL text, which is a different story). Unfortunately, this part of code
is a can of worm and nobody dares touching it.
JMarc
