Bug 923476

Summary:	net-libs/webkit-gtk should depend on media-libs/mesa[gles2]
Product:	Gentoo Linux	Reporter:	Daniel Harding <dharding>
Component:	Current packages	Assignee:	Gentoo Linux Gnome Desktop Team <gnome>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	leio
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://bugs.gentoo.org/show_bug.cgi?id=929992
Whiteboard:
Package list:		Runtime testing required:	---

Description Daniel Harding 2024-02-01 14:24:19 UTC

Version 2.41.5 of WebKitGTK removed support for the OpenGL API in the web process, instead requiring the use of GLES[1].  However, while the current net-libs/webkit-gtk ebuilds depend on media-libs/mesa, they do not enforce that media-libs/mesa be built with USE=gles2.

This was noticed when running app-office/gnucash on a system where media-libs/mesa had been built without USE=gles2.  In that case, attempting to open a report in GnuCash (which uses WebKit to render reports) simply displays a white screen and prints the message "Could not create EGL surfaceless context: EGL_BAD_ALLOC." to the console.  This message originates from WebKit's 
Source/WebCore/platform/graphics/egl/GLContext.cpp file[2][3].  Rebuilding media-libs/mesa with USE=gles2 causes GnuCash reports to display properly with no error message.

[1] https://github.com/WebKit/WebKit/commit/cfe917fec45bf72c371087ece034feee8454f1b4
[2] https://github.com/WebKit/WebKit/blob/6247bb871b437b9106c762def60044cc8ed5c3ca/Source/WebCore/platform/graphics/egl/GLContext.cpp#L380
[3] https://github.com/WebKit/WebKit/blob/6247bb871b437b9106c762def60044cc8ed5c3ca/Source/WebCore/platform/graphics/egl/GLContext.cpp#L429

Comment 1 Mart Raudsepp gentoo-dev

2024-04-14 08:40:58 UTC

Technically at least in 2.44 it only build depends on libepoxy and the rest is at runtime. Which is complicated and confusing to me in relation to closed source drivers like nvidia-drivers.