253337 - incorrect colors displayed on PNG images

Status: RESOLVED DUPLICATE of bug 220574

(Firefox :: General, defect)

Description

[vt]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040614 Firefox/0.9
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040614 Firefox/0.9

PNG images are displayed with incorrect colors. For example, in the attached
sample image in PNG-8 format [badcolors8.png], the color samples are displayed
as RGB 62 73 78 (0x3E494E) and RGB 67 67 67 (0x434343) when they should be
displayed as RGB 46 56 61 (0x2E383D) and RGB 51 51 51 (0x333333) respectively.

The same result is obtained with a copy of this image in PNG-24 format (attached
[badcolors.png]). However, the colors are displayed correctly on a GIF copy
(attached [badcolors.gif]).

Reproducible: Always
Steps to Reproduce:
1. Open image http://blog.foilhead.net/images/badcolors8.png in browser
2. Use the DigitalColor Meter utility to measure colors rendered

Actual Results:  
Color samples rendered as RGB 62 73 78 and RGB 67 67 67

Expected Results:  
The color samples should have been rendered as RGB 46 56 61 and RGB 51 51 51.

Comment 1

[vt]

Attachment: Sample image file (PNG-8)

Comment 2

[vt]

Attachment: Sample image file (PNG-24)

Comment 3

[vt]

Attachment: Sample image file (GIF)

Comment 4

[Greg K.]

[e-mail], what color bit depth is your monitor set at when this problem
occurs? Does it occur regardless of the bit depth set?

Does it also happen using Mozilla?

Comment 5

[vt]

(In reply to comment #4)
> [e-mail], what color bit depth is your monitor set at when this problem
> occurs? Does it occur regardless of the bit depth set?
> 
> Does it also happen using Mozilla?

I've tried in 256 colors, 'thousands' and 'millions' and the problem still occurs. It occurs in Mozilla 
(1.8a2) as well.

Comment 6

[Marco]

Confirmed on Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7)
Gecko/20040628 Firefox/0.9.1

When I drag the images to the Desktop and open them (with Preview.app) the
colors are rendered correctly. 

Safari also renders the colors correctly.

(Display properties: 1600 x 1200, 90Hz, Millions)

Comment 7

[Marco]

Odd: http://soli.inav.net/~johnh/SafariColorIssue/

Comment 8

[vt]

(In reply to comment #7)
> Odd: http://soli.inav.net/~johnh/SafariColorIssue/

Could this be related?
http://www.hut.fi/u/hsivonen/png-gamma.html

Comment 9

[HARUNAGA Hirotoshi]

*** This bug has been marked as a duplicate of 220574 ***