107143 - flashing when changing pages with xlib toolkit

Status: RESOLVED FIXED

(Core :: XUL, enhancement, P2)

Description

[Greg Onufer]

Every time a "tab" is changed or a new page is fetched and drawn there's
a flash as the entire page is cleared to white then the new contents drawn.
This doesn't happen with gtk.

Roland says:

  Maybe it's the issue that I am not setting a |None|-Pixmap as
  background (widget/src/gtk/ code does that to hide that it makes ugly
  position stunts _after_ mapping the window) - causing that the window
  background is filled with the bg color (white) first.

and asked me to file a bug.

Comment 1

[Boris Zbarsky [:bzbarsky]]

does xlib double-buffer?

Comment 2

[Roland Mainz]

Uhm... what do you mean with "double buffer" ?
Xlib stuff is just like GTK+ - but without using the GDK/GTK+ wrappers. This
stuff is just pure bloat.

Comment 3

[Roland Mainz]

Taking...

Comment 4

[Roland Mainz]

Accepting bug, setting milestone etc. etc.

Patch follows...

Comment 5

[Roland Mainz]

Attachment: Patch for 2001-11-05-cvs

Comment 6

[Roland Mainz]

I just added a "workaround" via setting the background pixmap of the windows to
|None| whcih disables the fill with the background pixel.

However, the real solution would be to avoid that windows get resized/moved
after they've been mapped. The issue hides AFAIK somewhere in the XP widget code
- but I am not much willing to touch this as the review/superreview/moa/approval
etc. etc. takes too much time.

The current solution just does the same as the widget/src/gtk/ code does: Hide
the issue... ;-(

Requesting r= (patched files not part of build, no sr= required) ...

Comment 7

[pocemit]

looks fine here, r=pocemit

Comment 8

[Roland Mainz]

Patch checked-in...

[e-mail], wanna VERIFY please ? :-)