214027 - Windows XP favicon is loaded without its alpha transparency

Status: VERIFIED DUPLICATE of bug 198293

(SeaMonkey :: Bookmarks & History, defect)

Description

[Skewer]

See attachment 128603 [details]. The icon contains a Windows XP format, true color format,
and 16 color format image sizes 16x16, 32x32, 48x48. Mozilla loads the Windows
XP image even though it doesn't read the alpha transparency layer. (Tested in
IE6/WinXP, behaves correctly. Don't know what IE does in non-WinXP situations.)

Steps to reproduce: Copy the data: URL to URL bar. (Save as HTML to test it in
IE. IE will not show the icon unless you add the site to favorites.)

Expected: Either should display the Windows XP icon properly with alpha
transparency (please don't fix that unless you're very bored) or bypass the XP
icon if possible and use a different format. A good solution would be to load
the truecolor, non-XP icon on a truecolor display.

Actual: WinXP icon format is loaded but not its alpha layer, resulting in all
pixels being shown at full opacity.

Hyatt: Gave to you because you wrote the ICO decoder. This is so silly I don't
think you should touch it unless you get very bored. Feel free to send it to
[e-mail] otherwise.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Is this only an issue with favicons, or also with just loading the .ico
directly?  If the latter, this should move to the correct imagelib component.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Also, hyatt does not read bugmail, in large part because of bug reports like
this one...

Comment 3

[Skewer]

Not important anyway. The issue is with the way the icon is displayed, i.e. it
should not be displaying the Windows XP format if it isn't capable of rendering
it properly.

Comment 4

[Skewer]

Attachment: Screenshot of problem

Comment 5

[Stephen Walker]

*** This bug has been marked as a duplicate of 198293 ***

Comment 6

[Skewer]

Wow, I can't believe someone fixed it.