382313 - Non Windows (Linux & AIX over xterm) can't display 1 pixel wide JPEG correctly

Status: RESOLVED INVALID

(Core :: General, defect)

Description

[Graham Cotgreave]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.13) Gecko/20060418 Fedora/1.0.8-1.1.fc4 Firefox/1.0.8

View the gradients produced with the URL above in Windows firefox and they appear correct.
View on firefox (over X term) and the colours are skewed. (blue appears purple etc)
Have produced 1 px 2 px and 3 px wide 28 px long gradient jpegs with paintshop and loaded these .jpg files into the browser as file:///d:/temp.jpg  1px wide is only correct on windows FF 2px and above is correct on all browsers

Reproducible: Always

Steps to Reproduce:
1. On a linuxor Unix platform open an xterm and start FF.
2. View website given above
2. or generate 1px wide jpg gradient
3. open as file://
Actual Results:  
A 1px wide jpg with a gradient of 0x0066cc to 0xffffff  shows purple to white 

Expected Results:  
A 1px wide jpg with a gradient of 0x0066cc to 0xffffff  shows blue to white

Comment 1

[[:Aleksej]]

WFM with Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a5pre) Gecko/20070529 Minefield/3.0a5pre
Your build (1.0.8-1.1) is so old it's unsupported, please try 2.0.* or trunk. If you have to use an older build that is still supported by Fedora distributor, please report the build's bugs to the package maintainer.

Comment 2

[Graham Cotgreave]

originally reported on a version 1.08 Linux but have also tested on 
Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.3) Gecko/20070321 Firefox/2.0.0.3 on Sun and Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.3) Gecko/20070321 Firefox/2.0.0.3 on AIX

Comment 3

[Adam Guthrie]

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a5pre) Gecko/20070529 Minefield/3.0a5pre

Which image are you referring to? This image: http://secretgeek.net/Gradient.aspx?Direction=H&Length=150&StartColor=FF00FF&EndColor=00FF00&Format=jpeg
shows up as pink at the top and bright green at the bottom on Firefox trunk and Firefox 2.0.0.4. Can you provide a direct link to the image you're talking about?

Also, does this happen in Firefox 3 alpha4?

Comment 4

[Graham Cotgreave]

yes http://secretgeek.net/Gradient.aspx?Direction=H&Length=150&StartColor=FF00FF&EndColor=00FF00&Format=jpeg
is a good example, On windows FF I agree it it magenta to green, but on the other platforms this is reversed. It only happens if the image is 1px wide, create two similar gradients in a paint program and the 1px wide displays incorrectly on non Windows platforms.

The other examples (and the main title bar) on the page also differ when viewed on Linux/unix.

Don't have access to install FF 3 A4 at present on the other platforms, I shall CC the network administrator on this.

Comment 5

[Carsten Book [:Tomcat]]

graham, can you try if you see this problem also in the latest Gran Paradiso Build Alpha 5 ?

Comment 6

[emily chen]

WFM when try to view the image: http://secretgeek.net/Gradient.aspx?Direction=H&Length=150&StartColor=FF00FF&EndColor=00FF00&Format=jpeg

on Mac, Windows, Solaris. Would you provide another test cases and image, so that we can reproduce this bug. Thanks 

Comment 7

[Graham Cotgreave]

(In reply to comment #5)
> graham, can you try if you see this problem also in the latest Gran Paradiso
> Build Alpha 5 ?
> 

The problem is fixed in this build when displayed in the browser (however the icon shown on in the address bar is still the other way up!) 

Comment 8

[Graham Cotgreave]

(In reply to comment #6)
> WFM when try to view the image:
> http://secretgeek.net/Gradient.aspx?Direction=H&Length=150&StartColor=FF00FF&EndColor=00FF00&Format=jpeg
> 
> on Mac, Windows, Solaris. Would you provide another test cases and image, so
> that we can reproduce this bug. Thanks 
> 
Emily, the most reliable source is a local file ;

Produce a 1 px and 2 px wide 28 px long gradient jpegs with paintshop (or similar) and load these .jpg files into the browser as file:///d:/temp1.jpg etc 1px wide is correct on windows FF (and 3.0a5 Gran Paradiso (see above)) but wrong on FF and Moz on Linux, Unix & AIX.
 2px and above is correct on all browsers

Comment 9

[Graham Cotgreave]

I have tried the latest code base and can it appears now to be correct in both the display area and the icon in the address bar. When run on an linux box via xming. However, there is still a difference between  the display area and the icon in the address bar when viewed over XVision. So I guess, that now the main issue has been sorted, it is down to odd behaviour on certain X-terms and thus the call should be closed as the solution would appear to install more modern xterms. Chrome for example does display the correct result which is a bit bizarre.