220574 - mozilla clients display png images with lighter colors

Status: RESOLVED INVALID

(Core Graveyard :: Image: Painting, defect)

Description

[Ben]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.0.1) Gecko/20030306 Camino/0.7
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.0.1) Gecko/20030306 Camino/0.7

In the page http://home.comcast.net/~arcticmac/new/ the background of the page
(set by a hex color) should be the same as the background of the png images used
in the logo/navigation areas, but the png's background color (part of the image
where a color is set, not a transparent part) is lighter in color when using
Mozilla for Mac or Camino.

Reproducible: Always

Steps to Reproduce:
1. simply load the URL, and look at the border between the images and the page
background.
Actual Results:  
I see that the png's have a lighter background than the page's.

Expected Results:  
I set the page's background color to match the png's.  Mozilla should be
displaying them the same not differently.

I've tried this in Safari, which does the colors correctly.

I've tested in Mozilla 1.4, 1.5a, and 1.5 rc2 as well as Camino 0.7, and the bug
occurs in all of them. I think I also tested 1.2 and 1.3 as well, though I might
be remembering incorrectly.  All the mozilla browsers that I tested had the problem.

Comment 1

[Boris Zbarsky [:bzbarsky]]

What are the gamma settings on that png?

Comment 2

[Ben]

i'm not really sure...  download it and check if you can...

I just did a google image search for "mac os" (random topic) and set it to
return only .png files... I took several, and opened them in both safari and
camino, and compared the color of various pixels (using mac OS x's Digital Color
Meter).  On all the images I tried, camino's color value was lighter than safari's.

Comment 3

[dolphinling]

Downloading the image, opening it in GIMP and saving it with no gamma results in
the same background color as the web page.

(Done on RH Linux 9)

Comment 4

[Ben]

OK, now I'm really at a loss... when I save with the gamma, IE (mac) is too
dark, safari is just right, and mozilla browsers are too light.  when I save
without, IE and Mozilla are fine, but safari is off...

I guess that means it is safari at fault, not mozilla right?
but what about all of those other images I found that had the gamma problems
too... are people just too stupid to know they should leave out the gamma or is
that not the normal?

Comment 5

[HARUNAGA Hirotoshi]

*** Bug 253337 has been marked as a duplicate of this bug. ***

Comment 6

[HARUNAGA Hirotoshi]

I think this is a dup of Bug 53597 or Bug 75133.

Comment 7

[Kathleen :Brade]

Confirming this bug; I saw it yesterday on Mozilla 1.7 on OSX.
I was creating a web page and created an image with a specific color to match
exactly with the html I was using.  I saved the image as *.png and *.gif.  The
gif matched perfectly; the png was wrong.  I think this is a Mozilla bug.

Comment 8

[Joël Kuiper]

*** Bug 210040 has been marked as a duplicate of this bug. ***

Comment 9

[Ben]

see this png test page for explaination:
http://www.libpng.org/pub/png/png-gammatest.html

Not sure whether I was at fault in my test case or not, but clearly the only color correction issue that's still a problem is ICC profiles.

SO... marking this bug as INVALID because my test case was at fault originally, not the browser (I think - in any case, the browser's no longer at fault).

See Bug 16769 as the bug on ICC profiles.

I think that takes care of everything...