763337 - Firefox 13.0 (and earlier versions) when scaling down - zooming out - embedded pictures (floating or not) loose position.

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[tgkrk]

Attachment: BRANDSTAETTERroman_przypowiesconarodzeniupanskim_01.htm

User Agent: Mozilla/5.0 (Windows NT 6.0; rv:13.0) Gecko/20100101 Firefox/13.0
Build ID: 20120601045813

Steps to reproduce:

My pages - xhtml 1.0 strict - e.g.
http://www.swzygmunt.knc.pl/POEMs/HTMs/BRANDSTAETTERroman/BRANDSTAETTERroman_przypowiesconarodzeniupanskim_01.htm

do not scale down properly - i.e. when zooming out embedded pictures
(floating or not) loose position.


Actual results:

when zooming out embedded pictures
(floating or not) loose position.


Expected results:

This is - I presume - because when
scaling approximations need to be taken as to the size of the blocks
constituting a web page, and if - as is the case with my pages - the
block sizes are calculated with a pixel accuracy sometimes those
approximation cause the total width of the adjacent blocks exceed the
width of the containing block. And this causes blocks to loose position. 

The same problem can be
seen when using Chrome. It is not in evidence though with MSExplorer

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

Last good nightly: 2007-10-25 (only text-Zoom avail.)
First bad nightly: 2007-10-26 (Content Zoom avail. and Default)

http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=PhoenixTinderbox&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2007-10-25+03%3A00&maxdate=2007-10-26+03%3A00&cvsroot=%2Fcvsroot

=> triggered by Bug 389628 - but that's likely not the Cause...

Comment 2

[Drew Willcoxon :adw (Away July 17–July 24)]

I can't reproduce on the latest nightly, except on the very smallest full zoom level, which seems like not a big deal.  tgkrk, do you still see the problem?

Comment 3

[(mostly gone) XtC4UaLL [:xtc4uall]]

The Issue remains unchanged against Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20130405 Firefox/23.0 ID:20130405103453 CSet: 40a228f74389 with all Zoom-out Levels toolkit.zoomManager.zoomValues;.3,.5,.67,.8,.9,1,1.1,1.2,1.33,1.5,1.7,2,2.4,3 (Default) provides.

Let's move this to Core for Investigation.

Comment 4

[Boris Zbarsky [:bzbarsky]]

Worksforme just like comment 2.  On Mac, though.

This needs a minimized testscase that still shows the problem.

Comment 5

[Hallvord R. M. Steen [:hallvors]]

Works for me too. 

Reporter: can you still reproduce?