gtk+-2.21.6 "gtk-demo" no stock icons load when listed for viewing (it's supposed to show a list of stock icons OR use default stock icon if not found: instead it shows errors)
i've build a LFS (compiling all from source from lib termcap all to qt-everywhere and firefox). req'ed thousands of DiY fixes - which are everyday for me no problem. left with this one nagging bug. gtk2 no stock icons.
Code:
(lt-gtk-demo:28786): GLib-GIO-CRITICAL **: g_loadable_icon_load: assertion `G_IS_LOADABLE_ICON (icon)' failed
(lt-gtk-demo:28786): Gtk-WARNING **: Error loading theme icon 'gtk-about' for stock: Failed to load icon
(lt-gtk-demo:28786): Gtk-CRITICAL **: gtk_default_render_icon: assertion `base_pixbuf != NULL' failed
(there were other errors but that is first. also it's repeated 2x because loading default "missing icon" icon also fails)
briefly (several functions are called):
Code:
FILES: gtk-demo -> stock_browser.c -> gtkwidget.c -> gtk_iconfactory.c -> gtkicontheme.c
last function: icon_info_ensure_scale_and_pixbuf
icon_info_ensure_scale_and_pixbuf assumes any stock icon is pre-loaded into variable "foo->loadable", else is ->filename (crashes if you try substituting filename, you cannot simply add a filename even for testing). iiesap is the ONLY place that loads a pixbuf in all the functions they all lead to calling iiesap to do the loading.
EXPLAINING iiesap
to load stock icon all functions call iiesap, and iiesap only fills in struct icon_info->loadable icon_info->filename was used (by app). i have no icons because nothing ever even attempts (no code that even might) fill in ->loadable.
a good thought is "well copy icon name to filename, try static or global or strcpy to ptr ->filename", so what if it's a little slower it's get cached by linux right?" all these fail / segfault (meaning compilation / fixing all applications needing stock icons would be indicated, impossible to expect or do that).
so i'm back to: i need ->loadable set not by filename but by/from gtk_stock_list_ids->gtk_stock_lookup->gtk_icon_factory_lookup_default (which gets icon_info - but isn't meant to attempt ->loadable - these only do lookups). ->loadable is never attempted and i haven't even found code which appears to attempt it (noting it would not be called even if it were there: as i said, no code does anything except lead to expecting function icon_info_ensure_scale_and_pixbuf to do it)
obviously there's something missing, that's impossible, thus the QUESTION.
QUESTION:
the above is impossible it seems. why is everything expecting it to work? what could fix this i can't think of anything that would fix missing code. yet this was released in binary form by major distros and icons worked, so "supposedly that's impossible", and being impossible is why i post the QUESTION
i said gtk-1.2 works so obviously stock icons are not impossible?
NOTES:
once ->loadable is set it is used to open icon_stream (stream file having icons) and pixbuf is then loaded by gdk from stream (as source of icon stream) and returned, glib/gdk loads pixi we'll assume it always succeeds). put another way: gtk caches icons (ie stock) but not filename type. an icon may be loaded by gtk). unix streams: "everything x is a file; passed params, memory, devices, network reads, everything"
gio/gloadableicon.c is immaterial as "loadable" was never loaded. gtk code infamously seldom cheks return values and continues on, gdk was called with null is why gdk error is shown, no glib blames please
MORE INDICATIONS: other than gtk-demo
firefore-20.0 (nightly) or 5 has no icons (but firefox-2 is fine, qt-4.74, all but gtk-2 is fine, even fvwm2 that uses gtk-2 seems to work (ships with own icons tho!)), and gtk-1 demos work and gnome-1 desktop works (have not tried 2,3). gtk-demos work excepting icon errors whenever loading stock icons. this is why i even tried gtk-demos: and the demo (build test) fails
also ... i've seen many questions on stackexchange and oracle about missing icons for gtk2 but never anything but a dodge - no answers, just hype like "oh you should upgrade to gtk3 why use 2?" or "reinstall your linux, you used pkg tool wrong" (debian sqeeze uses gtk2 - so the binaries they hacked apparently worked). all genericisms blaming poster for asking.
so, you could say "well fvwm depends on gtk2 and has icons" but it does not use stock icons. obviously there's allot of software (ie, scientific which cannot be simply "ported" by idiots) that use stock icons. i only guess firefox is one, i didn't chase that leopard yet
but in all, on the whole: gtk supposedly offers "service" to application programmers to take care of minor details like loading "copy paste" icon: and it's not doing it in many case, all said and done: it's not doing anything it advertises or only does so for special cases of chosen software (software that "bypasses normal rules").
BACKGROUND:
I've made an LFS using roughly year 2010 build toolchain pkgs and libs (newer on a few). Compiled and installed hundreds of pkgs from scratch. had thousands of software fixes todo to get it done. i have no strict rule other than to remain fully sourced and avoid phone-home software. (some pkgs do phone home and i'm looking into that in spare time: xml/sgml doc in build toolchain, firefox, gtk - the "well known hard to build" software tends to have phone-home hacks). gtk-2.9.4 is different from other fixes requires knowlege from someone who knows something about gtk-2.9.4 source code, dependencies, configuration - that is the part unknown)
