Instead of pointer to pointer. The two level of pointers were used to
inform the caller the window has been destroyed (pointer set to NULL).
Now, destruction of windows are now signaled by the return value, which
is marked `must_use`.
Problem with taking pointer to pointer is that they tends to pollute the
function signatures a little bit. And we are not using it well anyways.
A lot of the callers passes pointers to local variables to those
functions, so the information about window destruction doesn't actually
bubble up. So, we switch to use just one level of pointers instead.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
It could be hard for Ubuntu/Debian users to find the correct packages
for the dependencies.
Thanks @kgilmer
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
When a window has 0 opacity, it's rendering is skipped completely. Thus
its background isn't blurred.
This commit fixes that.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Dummy backends are backends that doesn't render anything on to the
screen or the target window. But they are still be useful for debug
purposes, and can be useful for other things too.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
blur_kernel_count could be none zero when user set a blur kernel but
didn't enable blur. In that case deinit_render will try to free
elements of blur_kerns_cache, causing a segfault because
blur_kerns_cache is never allocated.
Fixes#209
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
compton built from the git repo often _seems_ to be from a older release,
this change disambiguate the version string.
compton built from the git repo now have version string like this:
'vgit-xxxxx'
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
xerror handler might be called during XCloseDisplay, at which point
session_t is already destroyed, causing a segfault.
Ping #209
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Only render blur with transparency when window is fading in/out.
Otherwise, a window with a set opacity will always have a completely
blurred background.
Fixes#198
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
There were still some artifacts left when multiple semi-transparent
windows are stacked on top of each other.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Instead of rendering into the back buffer, render into a intermediate
texture.
This is a preparation for partial screen updating, which is necessary to
eliminate artifacts visible when using blur and use-damage together.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
In theory, it should be fine. But it causes mesa to stuck in
xcb_wait_for_special_event, indicating X connection setup issues.
Instead of investigating what went wrong in mesa, I choose to apply this
simple fix.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
-Wextra is removed, some of the warning flags included in -Wextra are
now explicitly set.
-Wno-unused-parameter is removed. The warnings will take a while to fix.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Doing this forces compton to blur every windows' background.
However, doing this can be beneficial, we will figure out a way
to do this properly in the future.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Previously, only the WM windows (window manager usually reparents the
application windows under its own window so it can manage them) are
checked for alpha channels. Some of the window managers (e.g. awesome)
acquire alpha channels for all of the WM windows, whether the underlying
application windows have alpha channel or not.
With this change, the application windows are also checked for alpha
channels. If a WM window has alpha but its child doesn't, only the WM
frame will be considered to be semi-transparent. Thus preventing some
unnecessary blurring.
Closes#191
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
During normalization of the kernel, the center element is added to the
sum twice, causing the resulting elements to be smaller than they should
be.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This is done by extending the blur area internally when process
blurring.
Ping: #50, cause this fixes that problem but only when using the
experiemental backends.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
When enabled, the result will be redirected to a window, and compton
won't take over the screen.
Makes debugging easier.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
If screen is not redirected, we don't need to reinitialize the backend
when we got a root change event.
Fixes#189
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
To prepare for different blur methods, the blur interface of backends
has been splitted into two parts.
Now to use blur, a blur context must be created first; then, the blur
method should be called with the blur context created.
Updated the existing backends to the new interface. Also implemented
handling of the new blur options.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Also fill the center of parsed kernel with 1. This shouldn't change the
behavior of the old backends since they will modify the center of the
kernels.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Yuxuan Shui