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Bug 689759 - Segmentation fault when using GLX and the Broadway backend
Segmentation fault when using GLX and the Broadway backend
Status: RESOLVED NOTABUG
Product: gtk+
Classification: Platform
Component: Backend: Broadway
3.6.x
Other Linux
: Normal normal
: ---
Assigned To: gtk-bugs
gtk-bugs
Depends on:
Blocks:
 
 
Reported: 2012-12-06 06:18 UTC by LE GARREC Vincent
Modified: 2016-04-28 14:22 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
GL and glx sample program (3.51 KB, text/x-c)
2012-12-06 06:18 UTC, LE GARREC Vincent 		Details

Description LE GARREC Vincent 2012-12-06 06:18:29 UTC 
Created attachment 230871 [details]
GL and glx sample program

glXChooseVisual always crash when launching a GL program with broadway backend. I don't really know if the problem come from gtk or X11.


Sample program enclosing. Compile it with "gcc glx.c  -o glx `pkg-config --cflags --libs gtk+-3.0 gl`"


run great with ./glx
but not with GDK_BACKEND=broadway ./glx


(gdb) bt

+ Trace 231262

  • #0 XQueryExtension
    at /var/tmp/portage/x11-libs/libX11-1.5.0/work/libX11-1.5.0/src/QuExt.c line 43
  • #1 XInitExtension
    at /var/tmp/portage/x11-libs/libX11-1.5.0/work/libX11-1.5.0/src/InitExt.c line 47
  • #2 XextAddDisplay
    at /var/tmp/portage/x11-libs/libXext-1.3.1/work/libXext-1.3.1/src/extutil.c line 110
  • #3 ??
    from /usr/lib64/libGL.so.1
  • #4 glXChooseVisual
    from /usr/lib64/libGL.so.1
  • #5 main
    at glx.c line 116 






Comment 1


Emmanuele Bassi (:ebassi)





          2016-04-28 11:45:19 UTC
        



You're using X11-only API (in a way that is neither supported nor recommended) with a different GDK backend (one that does not even have GL support), and you're getting a crash. That's entirely expected.






Comment 2


admin





          2016-04-28 14:18:26 UTC
        



So is there any way to show an application that uses OpenGL / Clutter through broadway then? Or some other way to display it in browser.






Comment 3


Emmanuele Bassi (:ebassi)





          2016-04-28 14:22:52 UTC
        



(In reply to admin from comment #2)
> So is there any way to show an application that uses OpenGL / Clutter
> through broadway then?

Currently, no. Most definitely not by using native X11 calls.

In theory it may be possible to add a WebGL context wrapper to the Broadway backend, and then use GtkGLArea, but Cogl/Clutter do not work that way in any case.