292201 - support "," icons in moz-icon protocol

Status: RESOLVED WONTFIX

(Core :: Graphics: ImageLib, defect)

Description

[Henrik Gemal]

the following works:
moz-icon:file://C:\Program Files\Internet Explorer\iexplore.exe?size=16

the following doesn't work:
moz-icon:file://C:\Program Files\Internet Explorer\iexplore.exe,-32528?size=16

Comment 1

[Joe Drew (not getting mail)]

What is a "," icon? When is it used?

Comment 2

[John Drinkwater (:beta)]

Windows binaries store more than one icon resource, the comma syntax is used to select one of the icons.

https://blogs.msdn.microsoft.com/oldnewthing/20100505-00/?p=14153
> In Windows 95, the Extract­Icon function was enhanced so that you could also specify an icon by its resource ID by passing its negative as the icon index. In other words, if you place a negative number after the comma, then its absolute value is interpreted as the resource ID.

Comment 3

[:Gijs (he/him)]

Given that we no longer have XPCOM add-ons and I don't think there's anywhere where we'd benefit from this in Firefox front-end, I don't think we will implement this.