183424 - using a semi-transparent PNG picture render a gray background with Mozilla 1.2 and 1.2.1 but is correctly displayed with Mozilla 1.1. The picture is scalled and positionned absolutly..

Status: RESOLVED WORKSFORME

(Core Graveyard :: GFX, defect)

Description

[nautilebleu]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; fr-FR; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; fr-FR; rv:1.2.1) Gecko/20021130

I use a semi-transparent PNG picture to create a mask that disallow user to
click on the page while a subwindow is open (see captures. It's a form of modal
window) In mozilla 1.1 the PNG picture is rendering correctly, even objects in
the background doesn't have a CSS background color/picture and are positionned
absolutly. 
With Mozilla 1.2, the picture is rendering with a gray background except if all
objects in the background have a CSS background color/picture or are not
positionned. This cas be partially corrected by using -moz-transparency (but it
affect the foreground too)
But this method is very boring and  isn't compatible with IE (the page works the
same way with IE5Mac that support PNG transparency and, for IEWin, use the MS
specific CSS attribute progid:DXImageTransform.Microsoft.AlphaImageLoader with a
javascript)

The picture is 1x1 and is scalled to 100% of the window.

Reproducible: Always

Steps to Reproduce:
see zip attachments

Actual Results:  
Semi-transparent PNG Pictures are not render correctly (gray background)

Expected Results:  
Semi-transparent PNG Pictures should be render with its transparency.

I use the Modern theme. Not tested with classic theme

Comment 1

[nautilebleu]

Attachment: The correct result in Mozilla 1.1

Comment 2

[nautilebleu]

Attachment: The problem in mozilla 1.2

Comment 3

[nautilebleu]

Attachment: Two aspects of the bug in a simple page

Comment 4

[Olivier Cahagne]

Depend on bug 183427.
Maybe we can even mark it dupe of it ?

Comment 5

[THOMAS, Renald]

We can see the bug with this page too :
http://www.mozilla.org/start/1.0/demos/eagle-sun.html

when moving the eagle in the top of the sun or the page.

Comment 6

[José Jeria]

The page with the eaglke looks good to me in build 20021204, Windows 2000, can u
attach a picture?

Comment 7

[R.K.Aa.]

i wonder commecomment 5 wfm too. I think it refers to the selection color on
images. (i think i saw a bug on that. image selection color to be replaced by an
outline)

Comment 8

[Hixie (not reading bugmail)]

I don't understand the bug here. Could we have a small (<1kb) test case attached
to this bug?

Comment 9

[THOMAS, Renald]

Attachment: Print screen for comment #5

Print screen for comment #5

Comment 10

[Hixie (not reading bugmail)]

Well yes, that's you selecting the image. Why is that a bug?

Comment 11

[THOMAS, Renald]

Because when I take the eagle, it's not gray ! But it's become gray when I move
it in the top of the sun or the page.

Comment 12

[José Jeria]

About the eagle sometimes getting selected, I mentioned this in 
bug 174163, comment 8

Comment 13

[Mike Kaply [:mkaply]]

Do you still see this problem?

Do you have a test site you can point us to?

Comment 14

[José Jeria]

Is this still an issue? The selecting problem mentioned of the eagle demo works
now fine. 

Comment 15

[Alfonso Martinez]

the eagle-sun demo was changed in bug 191356, so it isn't a valid test-case.

Comment 16

[simon annear]

Can anybody help with a better list of steps to reproduce this problem,
preferably using the test case and a more recent version of the browser

https://bugzilla.mozilla.org/attachment.cgi?id=108186

Comment 17

[José Jeria]

No reply from reporter, no clear ways to reproduce bug --> wfm

Please reopen if you can reproduce with a nightly trunk build.