199052 - jpg image can be horizontally distorted by overlapping window

Status: RESOLVED WORKSFORME

(Core Graveyard :: Image: Painting, defect)

Description

[jerzy szczudlowski]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312

Jpg image can be distorted in situation when we have browser covered by some
other window, and scroll page under (or "through") that window. Conditions:
1) browser must be overlapped only by one window
2) covering window must be stretch through Mozilla widgets area (i.e. tab bar
and/or navigation toolbar) and web page area
3) scrolling must not be performed smoothly; it's easier achieve this effect
with mouse wheel
4) covering window must not be bigger than about 200x150 pixels
5) browser window must have proper size

ad 5: I'm using resolution 1024x768. When Mozilla is maximized and try to
reproduce distortion on images from page http://www.wxwindows.org/screen05.htm,
I can do this only on top image (because of scrolling limits). Then, I'm
decreasing browser height by about half to extend scrolling limits and now I can
distort bottom image but not upper(!).





Reproducible: Always

Steps to Reproduce:
1. open http://www.wxwindows.org/screen06.htm
2. resize window to about 1000x750 pixels (for similar scrolling limits)
3. put small window (i.e. xterm resized to about 200x150 pixels)
4. place this small window that it will be covering some amount of navigation
toolbar and some amount of the page; ensure that right edge of top image is
hidding under our small window when scrolling down page
5. scroll page up and down using mouse wheel (distortion is also possibile while
using right scrollbar, but moves must not be smooth)

Actual Results:  
picture edge should be distorted horizontally


Expected Results:  
not produce distiortion

Comment 1

[jerzy szczudlowski]

Attachment: picture of bug reproduction

Image is cutted from 1024x768 screenshot. Red rectangle is ofcourse added by me
to focus the problem :)

Comment 2

[jerzy szczudlowski]

Comment on attachment 118362 [details]
picture of bug reproduction

Black square is the xawtv window covering Mozilla.

Comment 3

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

The latest beta releases can be obtained from:
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Thunderbird: http://www.mozilla.org/products/thunderbird/releases/1.5beta1.html
Seamonkey:   http://www.mozilla.org/projects/seamonkey/

Comment 4

[jerzy szczudlowski]

I can't reproduce it anymore in current versions.