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Thunderbird is acting really weird with its opaque region, it sometimes
set a (wrong) opaque region for a very short time during resize and
immediately remove it, but that can prevent non-opaque regions such as
drop shadows with client side decorations from being damaged correctly.

While this is clearly a client bug, it shows that damaging the
difference on opaque region update can be useful.

This reverts commit 1e80481a.

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Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Add more check for the compositor being enabled, to avoid running into
potential XErrors.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

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When disabling the compositor, X11 events may still be queued and
trigger and XError after the compositor output is disabled.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
#462

Older epoxy versions may miss some GL functions, warn at build time if
that occurs.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

If activate action is set to "none" and focus stealing prevention is
enabled, set the demand attention flag rather that raising the window,
so it doesn't come into the way of the user.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
Closes: #441

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O H authored Nov 29, 2020 and Olivier Fourdan committed Dec 01, 2020

The function prototypes are already a GSourceFunc, no need to cast the pointer.
Remove a gpointer casts.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

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Older epoxy versions may not provide all GL functions, causing the build
to fail.

Make sure to check for function availability.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Peter de Ridder authored Oct 11, 2012 and Olivier Fourdan committed Nov 29, 2020

Note: This cannot work with CSD (client-side decoration), as double-
click is handled by the client and not by the window manager with CSD.

Closes: xfce/xfwm4#1

DarkTrick authored Nov 23, 2020 and Olivier Fourdan committed Nov 29, 2020

Closes: #451 (Disable initial sorting of keyboard shortcuts)


Signed-off-by: DarkTrick <notebook22312@gmail.com>

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XFixesSetPictureClipRegion() with the region from the client window can
cause a RenderBadPicture error.

Make sure to include it within the XError trap.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>
xfce/xfwm4#460

When using GLX, xfwm4 relies on glXSwapBuffers() for vblank. Normally,
glXSwapBuffers() is non blocking, unless the previous call is still
pending.

That means that if xfwm4 queues glXSwapBuffers() faster than the refresh
rate, the following calls will be blocking, stalling the window manager
completely, which is bad for obvious reasons.

To avoid queuing a new glXSwapBuffers() before the previous one is
complete, use a GL sync mechanism.

Typically, we insert a GL Sync object just after the glXSwapBuffers()
command, and check if the GL Sync is triggered before redrawing again,
just like we do with Xpresent.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Just a small code rework, no functional change. This is a preparation
work for GL Sync which will do something similar for the GLX backend.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Debug mode means compiling with "-Werror", clean up various leftovers
breaking the build in debug.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

The Xpresent header check for PRESENT_FUTURE_VERSION but it's not set
anywhere.

Just set it to avoid a compilation issue with WError.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

For debugging purpose, log the time spent waiting on the fence sync and
the redrawing time, including the time spent in glXSwapBuffers().

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Just a small code rework, no functional change.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

Just a small code rework, no functional change.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

If either the GLX_MESA_swap_control or the GLX_EXT_swap_control
extension is available, use it to set the swap interval to 1.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

When using multiple buffers, no need to set all possible buffers, just
set the right number of buffers actually used per vblank backend.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

If GLX was configured (at build time) to use multiple buffers, we would
still use a single GLX drawable.

Assign a GLX drawable per buffer instead - Note that this doesn't make
any difference in the default case, as GLX uses a single buffer anyway.

Signed-off-by: Olivier Fourdan <fourdan@xfce.org>

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