223020 - PNG transparency not working - inheriting the body background image instead

Status: RESOLVED EXPIRED

(Core Graveyard :: Image: Painting, defect)

Description

[Bob Osola]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007

PNG images with alpha transparency are not being rendered with properly. They
are displaying a border which is being inherited from the background image
applied to the Body. F5 sometimes toggles this effect on and off for one PNG but
not two others. The page has valid XHTML markup & CSS.

Reproducible: Always

Steps to Reproduce:
1. Normal page view
2. F5 can repeatedly toggle the effect on and off for one of the PNGs but not all
3.



Expected Results:  
Each PNG should have a transparent background. This was working OK in Moz 1.2(?)
& Firebird 0.6 (Win). Now broken in Moz 1.5/Firebird 0.7 (Win). Works OK in
Opera 7.2 (Win) and IE6. 

Screenshots here:
Broken in Moz 1.5: http://homepage.ntlworld.com/bobosola/moz-1-5-PNG-bug.jpg
OK in FB 0.6: http://homepage.ntlworld.com/bobosola/firebird-0-6-working-OK.jpg

Comment 1

[thesh_bugs]

WFM Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.5) Gecko/20031007

Comment 2

[Glenn Randers-Pehrson]

Looks OK in Moz 1.4/Windows 95.

Comment 3

[Boris Zbarsky [:bzbarsky]]

Also not a problem in a current Linux trunk build....

Comment 4

[Bob Osola]

Further: If I do a Ctrl-A or mouse select of the page, the transparent areas 
of the PNGs are overwritten with page text (XP, Nvidia TNT, latest driver 
installed).

Screenshot: http://homepage.ntlworld.com/bobosola/moz-1-5-PNG-SelectAllbug.jpg

Comment 5

[Oleg Sidletskiy]

could not reproduce the problem, the page looks exactly the same in both:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031007
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6b) Gecko/20031113
Firebird/0.7+ (aebrahim)

XP, ATI Radeon 9000, Catalyst driver 3.8

Comment 6

[Garrett Murray]

this is most likely due to your vid card drivers. i was having the problem as
well on my win2k machine running moz 1.7b until today when i installed new
nvidia drivers.

Comment 7

[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:
Firefox:     http://www.mozilla.org/projects/firefox/
Thunderbird: http://www.mozilla.org/products/thunderbird/releases/1.5beta1.html
Seamonkey:   http://www.mozilla.org/projects/seamonkey/

Comment 8

[Gervase Markham [:gerv]]

This bug has been automatically resolved after a period of inactivity (see above
comment). If anyone thinks this is incorrect, they should feel free to reopen it.