37360 - Black areas appearing atop pages

Status: VERIFIED FIXED

(Core :: Layout, defect, P3)

Description

[tor]

Recently I've seen a number of pages which are showing black areas atop
a normally rendered page.  Generating expose events by dragging another
window atop the content area shows that mozilla knows how to render these
areas properly, it just draws black rectangles over the affected area.

See the attached image for an example.  Some other sites exhibiting the
same problem:

http://www.cinescape.com/
http://www.prodcat.panasonic.com/shop/product.asp?sku=PV-DC2090&CategoryID=293

Tested on a 4/26 CVS afternoon pull on solaris/native.

Comment 1

[tor]

Attachment: screenshot of mozilla with black rectangles

Comment 2

[R.K.Aa.]

I see the same on linux 2000-042609 M16
And i believe this is recent regression and really bug 20185 - the only
difference is that instead of grey it now paints black. I've encountered the
"black" problem on all the sites that previously had the "grey" problem.

The bug now triggers regardless of whether ViewManager2 is enabled or not.

Comment 3

[troy]

Page displays fine on NT using latest build. I guess it must be Solaris (or 
Unix) specific

Comment 4

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This also occurs on (using Linux build 2000-04-27-09-M16):
http://hotbot.lycos.com/  (previously http://www.hotbot.com/ , which I think is
a top100 site)
http://www.fas.harvard.edu/~dbaron/
viewer test4, test5, test8, test10, test13

Adding dogfood, nsbeta2, pp, and top100 keywords.

I am seeing GDK assertions whenever I load pages that show this problem.  For
example:

Gdk-CRITICAL **: file gdkregion.c: line 99 (gdk_region_get_clipbox): assertion
`region != NULL' failed.

Gdk-CRITICAL **: file gdkregion.c: line 291 (gdk_regions_subtract): assertion
`source2 != NULL' failed.

Gdk-CRITICAL **: file gdkregion.c: line 267 (gdk_regions_union): assertion
`source1 != NULL' failed.

cc:ing pavlov and blizzard

I did not see this problem in a debug build I pulled during yesterday's (04-26
09:18 PDT) tree closure or a daily build from 4-25.  (I've been seeing some
milder messy painting problems for a few days longer, though.)  Since it was
reported above in a daily build from 04-26, could it be optimized/nondebug-only?

Comment 5

[Stuart Parmenter]

it is hard to say... the assertions i'm sure are due to some changes I made last
night.  I will look at those, but they wouldn't be in the 4-26 build, so I think
that is something else.

Comment 6

[tor]

I was seeing these before the region changes pavlov made last night.
The problem appears in both debug/non-opt and non-debug/opt builds
pulled after the tree closed this morning (4/27).  Tested on
solaris/native with gtk+-1.2.7.

I'm not seeing the gdk-critical messages that were mentioned by 
[e-mail].

Comment 7

[Stuart Parmenter]

I have fixes for the region assertions.  I don't know what is going on other
than that though.

Comment 8

[leger]

Putting on [dogfood-][nsbeta2+] radar.

Comment 9

[Kevin McCluskey (gone)]

Waqar can you take a look?

Comment 10

[tor]

I'm not seeing the black areas on a 5/1 cvs pull on solaris/native.
Looks like this may have been fixed already.

Comment 11

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

In the Linux nightly of 2000-05-02-08-M16, I'm still seeing this on http:
//www.people.fas.harvard.edu/~dbaron/ , but not on the other pages.

Comment 12

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

And... in the same build, I'm seeing no painting in the borders of textareas
(like the one I'm typing in now).

Comment 13

[waqar]

Accepting

Comment 14

[leger]

Upating [nsbeta+] to read [nsbeta2+] in Status Whiteboard.

Comment 15

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

OK... the reason I was still seeing this is that my "Use viewmanager2" pref got
turned off.  I'm not sure how that happened (perhaps while testing this
originally??).

Is anyone else still seeing this bug with ViewManager2 turned on (the default)?

Comment 16

[Chris Petersen]

I'm not reproducing this problem with the June 2nd Linux build. ViewManager2 is 
turned on. 

David, Is this still working for you ?

Comment 17

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This works fine for me.

Comment 18

[Chris Petersen]

Drew,

Since this issue is not occuring for either David or myself, should we mark this 
as works for me ?

Comment 19

[Christopher Blizzard (:blizzard)]

This was fixed with my checkin to widget/src/gtk/nsWindow.cpp on 5/15/2000.

Comment 20

[waqar]

This was fixed with blizzard's checkin.

Comment 21

[Chris Petersen]

Marking verified per last comments.