[Bug 35718] Multiple games have extreme flicker, stutter, slowdown (Path of Exile, Roller Coaster Tycoon, Counter Strike: Global Offensive, Warframe, Crysis, Anno 1602, Splinter Cell: Blacklist)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=35718

--- Comment #111 from Ken Thomases <ken at codeweavers.com> ---
(In reply to Alex Henrie from comment #110)
> (In reply to Ken Thomases from comment #23)
> > This thrashing of the pixel format causes problems with the X11 driver.  The
> > X11 driver has to tear down and recreate the drawable each time it changes. 
> > This is what causes the flickering and unresponsiveness.
> 
> Why does the X11 driver have to destroy and recreate the window just to
> change the pixel format?

The pixel format dictates the fbconfig. The fbconfig dictates the visual. The
visual is a property of the window set at creation.

The fbconfig or visual is also used when creating the GLX rendering context.

When you attempt to make a GLX context current for a drawable, the visual of
the context and drawable must match or you get an error.

> I have been looking through
> dlls/winex11.drv/opengl.c and as far as I can tell, set_pixel_format calls
> set_win_format, which tears down and recreates the X window but does not
> actually use the pixel format except to set the value of a Wine-specific
> window struct member.

create_gl_drawable() passes the visual to create_client_window().

-- 
Do not reply to this email, post in Bugzilla using the
above URL to reply.
You are receiving this mail because:
You are watching all bug changes.