[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Anonymous]

There's something interesting in the Blender builds. There's a blender-
softwaregl script that seems to "fix" the semi-transparent window bug
for my system. Blender normal is flashing because of this bug, blender-
softwaregl fixes the problem. Can this script fix be applied to other
programs, somehow?

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Anonymous]

Bug is pretty major. 14.04 is still LTS guys, and a LOT of people are
holding on because of the systemd wars. PLEASE can anyone help me figure
out how to alleviate this bug without a kernel rebuild or something that
could totally crash my OS? Isn't there just some Compiz setting I could
adjust, or something?

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: compiz (Ubuntu)
   Status: New => Confirmed

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I see resize still needs work for manual stretching, 
I have tiling set up for corners rather than vertical, so didn't see the "half 
screen, full size 
vertical issue. Starts out oversize, then returns to correct size if focussed, 
unfocussed, 
and focussed again. My 1/4 size tiling setup used when building Debian packages 
works 
perfectly, so this looks like something is getting counted twice,

I'll make a note of this on my Archive repo

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

I said - might not do right things...

Try to vertically tile / maximize gedit window. Then move focus to other
window and then back to gedit. I tried to fix that and got new problems.

It is not simple fix - there is reason why ubuntu started to patch gtk+
and other things to get it working, most likely it was easier then
getting proper csd support in compiz.

And you are thinking wrong - gtk+ does not have any offending commits.
It is compiz problem / bug that requires proper fix...

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

With Ubuntu abandoning Unity, compiz-reloaded just starting their roadmap, and 
the future of the entire 0.9 branch uncertain, I have copied this code as of 
r4114 to 
https://github.com/lukefromdc/compiz
so there is always available source for the build Debian packages I publish. I 
have made one change of my own to it: reset the default for the Glide2 
animation to look like it did in the circa 2008 versions of compiz.

If you continue work on this branch, I plan to use it as well. If Ubuntu
merges it I can drop the Github repo until Ubuntu drops compiz.

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

What is this branch doing wrong? Out of the messages I get from Compiz
in .xsession-errors, only these appear to be warnings and I don't think
they are new (I KNOW the one about decoration is not)

compiz (core) - Info: Starting plugin: ccp
compiz (core) - Info: Loading plugin: composite
compiz (core) - Info: Starting plugin: composite
Failure: Module initialization failed
compiz (core) - Info: Loading plugin: opengl
compiz (core) - Info: Starting plugin: opengl

compiz (decor) - Warn: No default decoration found, placement will not
be correct

I see one more commit since last night, I am going to apply that to my
build.

I assume this branch will remain available at this repository? Ubuntu is likely 
to abandon compiz with their focus on GNOME, and compiz-reloaded is talking 
about possibly switching their fork to 0.9.13 with the Unity support stripped 
out.  In the 0.8 branch of compiz all attempts by multiple authors to advertise 
GTK_FRAME_EXTENTS support broke plugins interacting with windows.
https://github.com/compiz-reloaded/compiz/pull/8

Thus, if compiz 0.8 becomes the last version standing, I will have to
patch Gtk not to require GTK_FRAME_EXTENTS support (revert the offending
commit locally) so any version of compiz will work.

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

It might look like it works, but that branch is not enough and it might
not be even right way to fix things. :( I will not continue to work on
this...

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

The latest changes (as of r41131) WORK: transparent corners work fine is
CSD apps, and they can be moved to the edge and tiled with no gaps at
all. Good enough the source and build .deb will be uploaded to my
Archive page of packages for Debian Unstable

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

App was gnome-disks

On 4/12/2017 at 6:10 AM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>On Tue, Apr 11, 2017 at 11:32 PM, luke  
>wrote:
>
>> I just tested your build, behavior with CSD apps and tiling was
>> apparently the same as with the older single-line patch applied, 
>as I
>> normally apply it to all my builds. I fired up gnome-disks, and 
>it could
>> not be tiled to the edge nor even dragged to the edge with 
>either build.
>> For my uses this is OK as I use few CSD apps and never tile them.
>>
>
>Yes, because that branch still need many fixes...
>
>Currently it just adds _GTK_FRAME_EXTENTS and fixes resize 
>rectangle size
>for resize and move plugins. Default mode must be changed to 
>outline or
>rectangle to test that.
>
>I fired up GtkInspector and may have found the problem, at least in
>> gnome-disks. When the application is maximized, the window state 
>comes
>> up as "background csd maximized" but when it is tiled only as
>> "background csd" meaning theme cannot so easily separate out the 
>tiled
>> state. The maximum box-shadow radius controls the gap left when 
>tiling,
>> so it appears we have a choice beteeen black corners on all CSD 
>apps and
>> gaps between and around them when tiled. Server-side decorated 
>apps tile
>> fine, at least in my theme. I'll take the gaps over the black 
>corners or
>> forced use of a square-edged theme.
>>
>
>What app? For example I can not tile nautilus window, but it works 
>fine
>with gedit (with metacity). That could be reason why style class is
>missing. Simply window is not really tiled, it is just resized. 
>Gedit has
>tile class with both window managers - compiz & metacity.
>
>I build compiz locally with a fix that works for my use case, and 
>that's
>> about all I am hoping for at this point. My theme does support 
>tiling,
>> for which I have exactly one use case which does not involve CSD
>> windows.
>>
>> Fix might be to have compiz put a "tiled" state on all tiled CSD 
>windows
>> (if possible), then load a CSS file to force the box shadow to 
>"none"
>> when tiled
>>
>
>It is not compiz job...
>
>-- 
>You received this bug notification because you are subscribed to 
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>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in Compiz:
>  New
>Status in compiz package in Ubuntu:
>  New
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/compiz/+bug/1436553/+subscriptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

On Tue, Apr 11, 2017 at 11:32 PM, luke  wrote:

> I just tested your build, behavior with CSD apps and tiling was
> apparently the same as with the older single-line patch applied, as I
> normally apply it to all my builds. I fired up gnome-disks, and it could
> not be tiled to the edge nor even dragged to the edge with either build.
> For my uses this is OK as I use few CSD apps and never tile them.
>

Yes, because that branch still need many fixes...

Currently it just adds _GTK_FRAME_EXTENTS and fixes resize rectangle size
for resize and move plugins. Default mode must be changed to outline or
rectangle to test that.

I fired up GtkInspector and may have found the problem, at least in
> gnome-disks. When the application is maximized, the window state comes
> up as "background csd maximized" but when it is tiled only as
> "background csd" meaning theme cannot so easily separate out the tiled
> state. The maximum box-shadow radius controls the gap left when tiling,
> so it appears we have a choice beteeen black corners on all CSD apps and
> gaps between and around them when tiled. Server-side decorated apps tile
> fine, at least in my theme. I'll take the gaps over the black corners or
> forced use of a square-edged theme.
>

What app? For example I can not tile nautilus window, but it works fine
with gedit (with metacity). That could be reason why style class is
missing. Simply window is not really tiled, it is just resized. Gedit has
tile class with both window managers - compiz & metacity.

I build compiz locally with a fix that works for my use case, and that's
> about all I am hoping for at this point. My theme does support tiling,
> for which I have exactly one use case which does not involve CSD
> windows.
>
> Fix might be to have compiz put a "tiled" state on all tiled CSD windows
> (if possible), then load a CSS file to force the box shadow to "none"
> when tiled
>

It is not compiz job...

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I just tested your build, behavior with CSD apps and tiling was
apparently the same as with the older single-line patch applied, as I
normally apply it to all my builds. I fired up gnome-disks, and it could
not be tiled to the edge nor even dragged to the edge with either build.
For my uses this is OK as I use few CSD apps and never tile them.

I fired up GtkInspector and may have found the problem, at least in
gnome-disks. When the application is maximized, the window state comes
up as "background csd maximized" but when it is tiled only as
"background csd" meaning theme cannot so easily separate out the tiled
state. The maximum box-shadow radius controls the gap left when tiling,
so it appears we have a choice beteeen black corners on all CSD apps and
gaps between and around them when tiled. Server-side decorated apps tile
fine, at least in my theme. I'll take the gaps over the black corners or
forced use of a square-edged theme.

I build compiz locally with a fix that works for my use case, and that's
about all I am hoping for at this point. My theme does support tiling,
for which I have exactly one use case which does not involve CSD
windows.

Fix might be to have compiz put a "tiled" state on all tiled CSD windows
(if possible), then load a CSS file to force the box shadow to "none"
when tiled

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I was able to set it back to "new" as there is no "fix insufficient"
status.

Even logging into Launchpad is a nuisance because they use the referrer header 
that I
normally block as an anti-tracking measure. It has to be changed for this and 
then changed
back. 

On 4/11/2017 at 3:16 PM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>luke, do you also have everything greyed out if you try changing 
>bug
>status?
>
>That was not fix... While it fixes something it introduce new
>problems... So compiz must be tested with csd windows + theme that 
>has
>good csd window support...
>
>So if you want this fixed, please help. Build compiz from my new 
>branch
>and test it with theme that has good CSD window support and as 
>minimum
>report plugins that are affected.
>
>To see problem, selected Adwaita and try to tile (try to vertically
>maximize on half screen, grid plugin) CSD window... You will see 
>that
>there is "empty" space around window...
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in Compiz:
>  New
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/compiz/+bug/1436553/+subscriptions


** Changed in: compiz (Ubuntu)
   Status: Fix Released => New

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

luke, do you also have everything greyed out if you try changing bug
status?

That was not fix... While it fixes something it introduce new
problems... So compiz must be tested with csd windows + theme that has
good csd window support...

So if you want this fixed, please help. Build compiz from my new branch
and test it with theme that has good CSD window support and as minimum
report plugins that are affected.

To see problem, selected Adwaita and try to tile (try to vertically
maximize on half screen, grid plugin) CSD window... You will see that
there is "empty" space around window...

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I don't know how to reset it to new and could not call it "confirmed" as
the original reporter. The only fix I have ever found that works is the
never-merged extant patch. Now with Unity being dumped some are saying
Ubuntu might stop maintainance on compiz 0.9. That leaves me wondering
if compiz-reloaded (0.8) will be the last maintained branch. If so, I
might have to port this patch over to it, though I have yet to test
compiz-reloaded.

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

Can someone set this bug back to new or confirmed? It is definitely not
fixed...

** Also affects: compiz
   Importance: Undecided
   Status: New

** Branch unlinked: lp:ubuntu/wily-proposed/compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

On Sat, Feb 6, 2016 at 8:56 PM, luke  wrote:

> I've never used tiling so naturally I would never see that bug. I did see
> a similar result,
> where if I drag gnome-disks to the top edge it doesn't always go all the
> way there.
> For my purposes that's OK, but probably not for someone using tiling. That
> margin
> always exists, it's what becomes the black border without this fix, it's
> just transparent
> now. Perhaps GTK3.16 and later drop the margin when a window is tiled if
> and only if
> the WM is not recognized as a compositor? How do
> mutter/shell/muffin/cinnamon
> deal with this?
>


These windows managers simply does support _GTK_FRAME_EXTENTS and they also
report it by adding _GTK_FRAME_EXTENTS to _NET_SUPPORTED.


BTW, in gtk3.20, "window.frame" changes to "decoration."
>


Yes, I know. More work for theme authors, but this is not problem for
ubuntu 16.04 as it will not include GTK+ 3.20.


OK, the question this raises if a fix for both issues at once is not found
> is this: which
> is worse, ugly borders on CSD apps or CSD apps that don't tile all the way
> to the
> edge? Right now the choice is one or the other, and I suspect that will be
> different from
> user to user.  If the compositing support is deemed more important, than
> it could be
> merged now and the tiling worried about later.
>


My personal opinion is - this "fix" should be merged. :) But I am not
ubuntu developer...


Also, compiz as currently used by Ubuntu is enough of a problem with
> gtk3.16 and later
> that not fixing this could spur Ubuntu devs to speed up the transition to
> Unity 8 and
> drop compiz support altogether for flavors like Ubuntu MATE. I doubt they
> would change
> course now and do this for 16.04, but there is the real chance that 16.04
> will be the last
> time the flagship "ubuntu" version uses compiz and it is an LTS release.
> Thus, a strong
> reason to try and get things right by fixing both bugs. Not merging the
> compositing fix
> increases the risk that it will fall by the wayside like it did last
> Spring.
>
> I don't know how to work with bzr at all other than cut and paste the code
> to clone the
> repo locally-and with something the side of  compiz, that creates
> bandwidth problems
> on my connection. Thus the local application of patches to downloaded
> tarballs-and any
> mistakes that might have created last summer.
>
>
> On 2/6/2016 at 6:30 AM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net>
> wrote:
> >
> >If you tried to merge client-frame-api branch that it could cause
> >problem, because it is already merged.
> >
> >Rounded corners works, but there is new problems. Select theme
> >that adds
> >margin != 0 on .window-frame - for example Adwaita and then try to
> >tile
> >CSD window to left or right side of screen.
> >
> >--
> >You received this bug notification because you are subscribed to
> >the bug
> >report.
> >https://bugs.launchpad.net/bugs/1436553
> >
> >Title:
> >  Transparent windows render black with Gtk3.16 and compiz
> >
> >Status in compiz package in Ubuntu:
> >  Fix Released
> >
> >Bug description:
> >  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without
> >unity (in
> >  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
> >  issues with failures to render certain Gtk Windows transparent.
> >  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
> >
> >  My theme sets popup windows used by menus transparent, and Gtk
> >  application windows with client side decoration (CSD) have
> >  transparency underlying the GtkHeaderBar. In the latter case
> >this is
> >  what makes rounded corners possible.   The transparent popup
> >windows
> >  used with my theme to support menus resembling gnome-shell's
> >widgets
> >  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14
> >but due
> >  to the window issue get black corners with compiz and Gtk-3.16.
> >  Windows drawn transparent with cairo still work, but windows set
> >  transparent by GTK usually do not,
> >
> >  Changing the window manager to Mutter makes transparency work
> >  perfectly. In Gtk-3.14 transparency works in Metacity with
> >compositing
> >  enabled, it does not with gtk-3.16.
> >
> >  I am not sure whether this should be considered a compiz bug or
> >a Gtk
> >  bug, but since transparency works fine in gnome-shell and mutter
> >(as
> >  used by shell), I am not sure the GNOME team would consider this
> >a bug
> >  they are willing to fix.  If nobody fixes this any GNOME
> >application
> >  that forces client side decoration (such as the gtk3-demo or gtk3
> >  -widget-factory) will be ugly in Ubuntu unless the client side
> >  decorations have square corners.
> >
> >To manage notifications about this bug go to:
> >https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
> >criptions
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1436553
>
> Title:
>   Transparent 

Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I've never used tiling so naturally I would never see that bug. I did see a 
similar result, 
where if I drag gnome-disks to the top edge it doesn't always go all the way 
there.
For my purposes that's OK, but probably not for someone using tiling. That 
margin
always exists, it's what becomes the black border without this fix, it's just 
transparent
now. Perhaps GTK3.16 and later drop the margin when a window is tiled if and 
only if
the WM is not recognized as a compositor? How do mutter/shell/muffin/cinnamon
deal with this?

BTW, in gtk3.20, "window.frame" changes to "decoration."

OK, the question this raises if a fix for both issues at once is not found is 
this: which
is worse, ugly borders on CSD apps or CSD apps that don't tile all the way to 
the 
edge? Right now the choice is one or the other, and I suspect that will be 
different from
user to user.  If the compositing support is deemed more important, than it 
could be 
merged now and the tiling worried about later.

Also, compiz as currently used by Ubuntu is enough of a problem with gtk3.16 
and later
that not fixing this could spur Ubuntu devs to speed up the transition to Unity 
8 and 
drop compiz support altogether for flavors like Ubuntu MATE. I doubt they would 
change
course now and do this for 16.04, but there is the real chance that 16.04 will 
be the last
time the flagship "ubuntu" version uses compiz and it is an LTS release. Thus, 
a strong 
reason to try and get things right by fixing both bugs. Not merging the 
compositing fix
increases the risk that it will fall by the wayside like it did last Spring.

I don't know how to work with bzr at all other than cut and paste the code to 
clone the 
repo locally-and with something the side of  compiz, that creates bandwidth 
problems 
on my connection. Thus the local application of patches to downloaded 
tarballs-and any 
mistakes that might have created last summer.


On 2/6/2016 at 6:30 AM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>If you tried to merge client-frame-api branch that it could cause
>problem, because it is already merged.
>
>Rounded corners works, but there is new problems. Select theme 
>that adds
>margin != 0 on .window-frame - for example Adwaita and then try to 
>tile
>CSD window to left or right side of screen.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

One more thing:  At least in gtk3.20, tiled window decorations can be
themed differently, just as maximized windows can be. probably this is
true in older versions as well, so the margin on tiled windows issue can
be fixed in the themes without changing the margins on a normal window.
In my experience, a margin of zero gives a CSD window that cannot be
resized.

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

If you tried to merge client-frame-api branch that it could cause
problem, because it is already merged.

Rounded corners works, but there is new problems. Select theme that adds
margin != 0 on .window-frame - for example Adwaita and then try to tile
CSD window to left or right side of screen.

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

Only the branch I am using worked in my systems for some reason. I don't know 
enough
about the internal workings of compiz to explain what was missing, only that 
when I attempted
to use the other patch (the short one) with newer compiz I got missing 
functions and that 
sort of thing. Was probably nine months ago, I have forgotten the details.

At any rate, most of my work has been in C and not C++ and I really don't know 
a lot about
the inner workings of compiz, I got my version working by sheer experiment and 
trial and
error, trying both of the available branches referenced in the bug report.

My advice: attempt to apply the patch, see what comes up missing when you try 
to build,
and start adding that back, one piece at a time. 

On 2/5/2016 at 8:20 AM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>1) What code was removed?
>
>2) GTK+ 3.16 or newer requires that window manager explicitly 
>advertises
>that it does support _GTK_FRAME_EXTENTS. If it does not do that 
>then
>GTK+ thinks that CSD is not supported. This is why windows windows 
>looks
>like they are running without compositing manager.
>
>It is not GTK+ that does not recognize compoz as compositor - 
>simply
>compiz does not say - hey I do support _GTK_FRAME_EXTENTS.
>
>It could be "fixed" by adding _GTK_FRAME_EXTENTS to _NET_SUPPORTED 
>- see
>my branch. But problem is that compiz really does not support
>_GTK_FRAME_EXTENTS so adding it to _NET_SUPPORTED is wrong.
>
>If it would be enabled then using theme that has .window-frame { 
>margin:
>..; box-shadow: ...; } (Adwaita as example) then if you would tile 
>csd
>window to left or right side of screen then it would not look 
>tiled -
>there would empty space around window.
>
>Basically missing _GTK_FRAME_EXTENTS support is reason why:
>1) Ambiance theme does not add .window-frame { margin: ...; }
>1) GTK+ is patched with 0001-gtkwindow-set-transparent-background-
>color.patch and unity_rbga_tooltips.patch.
>
>If csd window is used without compositor and theme does not has 
>fallback
>style .solid-csd then rounded corners will be black - color that 
>is set
>by 0001-gtkwindow-set-transparent-background-color.patch.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

Adding back what?

Just did:
bzr branch lp:compiz
bzr merge lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-to-net-supported
dch -i
bzr builddeb -S
pbuilder-dist xenial build ../compiz_0.9.12.2+16.04.20151211-0ubuntu2.dsc

And it built just fine.

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

Might have been the client-frame-api branch that didn't build last
summer against 0.9.12.1 but I think I tried everything,but as I said
with too little knowledge of Compiz internals to really know what I was
doing. total trial and error and I simply kept what ended up working.

On 2/5/2016 at 3:41 PM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>Adding back what?
>
>Just did:
>bzr branch lp:compiz
>bzr merge lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-to-
>net-supported
>dch -i
>bzr builddeb -S
>pbuilder-dist xenial build ../compiz_0.9.12.2+16.04.20151211-
>0ubuntu2.dsc
>
>And it built just fine.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I will test that branch and see if it works. Like I said, I do NOT know
what all was changed between 0.9.12.0 qnd 0.9.12.1, only that I got all
kinds of missing things when I tried to apply the patch that i had
success with in 0.9.12.0 with. Sorry if i cannot help more, this was
just trial and error with no background in C++ to properly know what I
was doing. that trial and error got me a workng Compiz and I left it at
that. If your version works in my system I will update to it and push
debian packages to the Archive site.

On 2/5/2016 at 3:41 PM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>Adding back what?
>
>Just did:
>bzr branch lp:compiz
>bzr merge lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-to-
>net-supported
>dch -i
>bzr builddeb -S
>pbuilder-dist xenial build ../compiz_0.9.12.2+16.04.20151211-
>0ubuntu2.dsc
>
>And it built just fine.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

1) What code was removed?

2) GTK+ 3.16 or newer requires that window manager explicitly advertises
that it does support _GTK_FRAME_EXTENTS. If it does not do that then
GTK+ thinks that CSD is not supported. This is why windows windows looks
like they are running without compositing manager.

It is not GTK+ that does not recognize compoz as compositor - simply
compiz does not say - hey I do support _GTK_FRAME_EXTENTS.

It could be "fixed" by adding _GTK_FRAME_EXTENTS to _NET_SUPPORTED - see
my branch. But problem is that compiz really does not support
_GTK_FRAME_EXTENTS so adding it to _NET_SUPPORTED is wrong.

If it would be enabled then using theme that has .window-frame { margin:
..; box-shadow: ...; } (Adwaita as example) then if you would tile csd
window to left or right side of screen then it would not look tiled -
there would empty space around window.

Basically missing _GTK_FRAME_EXTENTS support is reason why:
1) Ambiance theme does not add .window-frame { margin: ...; }
1) GTK+ is patched with 0001-gtkwindow-set-transparent-background-color.patch 
and unity_rbga_tooltips.patch.

If csd window is used without compositor and theme does not has fallback
style .solid-csd then rounded corners will be black - color that is set
by 0001-gtkwindow-set-transparent-background-color.patch.

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I just manually applied the add-gtk-frame-extents-to-net-supported (one line, 
one file) to a
downloaded copy of current Ubuntu Xenial compiz-0.9.12.2+16.04.20151211, built 
fine, 
runs fine. Perhaps the previous confusion came from attempts to build the other 
branch
referenced in the bug report last summer, maybe of all the things I tried to do 
with 
0.9.12.1 I missed this one combination? Anyway, I've got it working here, gtk 
window
decorator and all, built against GTK 3.19.8 on top of all else.

Tested it with gnome-disks, compositing works fine and the rounded
corners work!

On 2/5/2016 at 3:41 PM, "Alberts Muktupāvels" <1436...@bugs.launchpad.net> 
wrote:
>
>Adding back what?
>
>Just did:
>bzr branch lp:compiz
>bzr merge lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-to-
>net-supported
>dch -i
>bzr builddeb -S
>pbuilder-dist xenial build ../compiz_0.9.12.2+16.04.20151211-
>0ubuntu2.dsc
>
>And it built just fine.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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Title:
  Transparent windows render black with Gtk3.16 and compiz

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Re: [Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

This patch DOES NOT WORK with compiz 0.9.12.1 or later, as the underlying code 
that makes it work was removed. 
Getting this to work with current compiz would require finding all of the code 
it uses that was removed between 0.9.12.0
and 0.9.12.1 and adding it back along with the patch. This was more than I was 
able to do at the time, and yes, I did try.

Due to this mess, I took the old patched 0.9.12.0 version, replaced the gtk 
directory with one from a post gtk3.16 version
so it could build the window decorator with later versions of gtk3 and 
metacity. and stashed both the modded source and
debian packages built from it on Archive at:

https://archive.org/details/DebianPackagesForMate-
desktopWityGtk3AndCustomPanelTheme

Where I offer debs for mate built with gtk3 and two built versions of compiz: 
one for Ubuntu, and one for Debian with a 
forced restart to get the window decorator working.

Getting anything newer to work will require either reverting the removal of 
that underlying code or else writing entirely new
code to tell gtk 3.16 and later that compiz is in fact a compositor! The issue 
seems to be that gtk3.16 and later do not
recognize Compiz as being a compositor and therefore default to not supporting 
composition with it. Compositio can be
forced in the application code, so I included that in my mate theme support 
patches which went upstream for 1.12.0 and
later.

On 2/4/2016 at 1:16 AM, "Khurshid Alam"  wrote:
>
>@luke
>
>Can you explain how did you manage to compile compiz-0.9.12.2 with
>_GTK_FRAME_EXTENTS patch? For me it is failing , if I let 
>launchpad to
>build it for me.
>
>-- 
>You received this bug notification because you are subscribed to 
>the bug
>report.
>https://bugs.launchpad.net/bugs/1436553
>
>Title:
>  Transparent windows render black with Gtk3.16 and compiz
>
>Status in compiz package in Ubuntu:
>  Fix Released
>
>Bug description:
>  Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without 
>unity (in
>  mate compiled with gtk-3) and testing Gtk-3.16 I run into serious
>  issues with failures to render certain Gtk Windows transparent.
>  Hardware is AMD FX 8120 with radeon HD 6750 GPU.
>
>  My theme sets popup windows used by menus transparent, and Gtk
>  application windows with client side decoration (CSD) have
>  transparency underlying the GtkHeaderBar. In the latter case 
>this is
>  what makes rounded corners possible.   The transparent popup 
>windows
>  used with my theme to support menus resembling gnome-shell's 
>widgets
>  in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 
>but due
>  to the window issue get black corners with compiz and Gtk-3.16.
>  Windows drawn transparent with cairo still work, but windows set
>  transparent by GTK usually do not,
>
>  Changing the window manager to Mutter makes transparency work
>  perfectly. In Gtk-3.14 transparency works in Metacity with 
>compositing
>  enabled, it does not with gtk-3.16.
>
>  I am not sure whether this should be considered a compiz bug or 
>a Gtk
>  bug, but since transparency works fine in gnome-shell and mutter 
>(as
>  used by shell), I am not sure the GNOME team would consider this 
>a bug
>  they are willing to fix.  If nobody fixes this any GNOME 
>application
>  that forces client side decoration (such as the gtk3-demo or gtk3
>  -widget-factory) will be ugly in Ubuntu unless the client side
>  decorations have square corners.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subs
>criptions

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Khurshid Alam]

@luke

Can you explain how did you manage to compile compiz-0.9.12.2 with
_GTK_FRAME_EXTENTS patch? For me it is failing , if I let launchpad to
build it for me.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Khurshid Alam]

@luke

I agree this is not fixed by compiz yet. If it is not fixed, then why it
is marked as "Fixed Release"?

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Eleni Maria Stea]

** No longer affects: compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

This is NOT FIXED by compiz 0.9.12.2, at least not in Debian Unstable
with gtk 3.17.9 and has not been fixed on my system by any version I
have tried except the version I built myself from
https://code.launchpad.net/~albertsmuktupavels/compiz/add-gtk-frame-
extents-to-net-supported with the "gtk" directory replaced with a more
recent one for Metacity 3.16 support.

Source code for this available at 
https://archive.org/download/DebianPackagesForMate-desktopWityGtk3AndCustomPanelTheme/compiz-0.9.12.0extents-supportedgtk3.16-1luke4_amd64.deb
  

Debian packages for Debian Unstable also published in the same article, which 
is a collection of MATE-gtk3 packages plus compiz and network-manager-gnome 
packages:
https://archive.org/details/DebianPackagesForMate-desktopWityGtk3AndCustomPanelTheme

I have yet to get compositing of CSD apps to work on any other compiz
version. The modified MATE packages (which support a special transparent
panel menu theme) have composition support forced and will work with any
version of Compiz, but Debian does not patch GNOME apps to remove CSD so
this issue is important there.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Launchpad Bug Tracker]

This bug was fixed in the package compiz -
1:0.9.12.1+15.10.20150805-0ubuntu1

---
compiz (1:0.9.12.1+15.10.20150805-0ubuntu1) wily; urgency=medium

  [ Alberts Muktupāvels ]
  * Change icon size back to 48px in application switcher plugin. (LP:
#1237057)

  [ CI Train Bot ]
  * New rebuild forced.

  [ Dmitry Shachnev ]
  * Move window switcher plugins to compiz-plugins-default. (LP:
#971051, #1465647)
  * debian/compiz-gnome.gsettings-override: Remove unityshell from
active plugins, and add switcher. (LP: #1469086)

  [ Eleni Maria Stea ]
  * It fixes the 3d windows plugin. Problem: The 3d clipping is
performed in viewing space (modelview transformation) and should be
done inside the shader when we use shaders otherwise the viewing
space pipeline operations will be ignored. Compiz used to perform
the clipping inside the td plugin using pipeline functions, then it
was loading a generic shader program (no clipping operations) to
render the windows and then it rendered the 3d quads around the
windows using the pipeline (so these were clipped correctly). (LP:
#1395697)
  * Sometimes the MultipleCubes, Automatic or OneBigCube option might be
set although we are not in multimonitor. Modified the 3d windows
plugin to check the number of monitors as well.

  [ Marco Trevisan (Treviño) ]
  * Window: add clientFrame(), to get the client-side decoration extents
(LP: #1422768, #1436553)
  * Window: compute the correct output using the absolute window
position (LP: #1475721)

  [ Martin Wimpress ]
  * align MATE profile more closely with Marco

  [ Stephen M. Webb ]
  * Fix a FTBFS when -std=c++11 is used. (LP: #1477654)
  * Fixed the Compiz manpage and --help message to agree with the actual
command-line options supported. (LP: #1475508)
  * force Compiz to build using C++-11 (required by build dependency
libgtkmm-3.0-1). (LP: #1477978)

 -- CI Train Bot ci-train-...@canonical.com  Wed, 05 Aug 2015 11:26:51
+

** Changed in: compiz (Ubuntu)
   Status: Confirmed = Fix Released

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I tested the pubished Ubuntu Wily binary packages Friday night, same
results in gtk3.17: a nasty black border around all of GNOME's CSD
applications and no shadows in application popup windows. Shadows and
other composited effected seemed fine on server-side decorated windows
but not popup windows of any kind, which gtk now sees as csd windows.

 At least I was able to force transparency support in my customised MATE
build (with 3 lines of added source code per affected window), but GTK
3.17 at least is still not detecting by default that Compiz is a
composiitng window manager. It appears that the temporary fix GTK used
in 3.16 (no borders but no compositing or shadows) may have been
reverted based on those borders, similar to those that appeared with
gtk3.15.

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  Transparent windows render black with Gtk3.16 and compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

Has compiz - 1:0.9.12.1+15.10.20150805-0ubuntu1 been tested with GNOME
apps that use client side decoration, WITHOUT any Ubuntu patches that
remove CSD and restore normal server side decoration and running by
itself without Unity running?

This version does not fix anything for me in gtk3.17 except of course
the Metacity 3.16 or later issue. I tested both Ubuntu's packages and my
custom build in the Debian Unstable that is now my main system with the
same results. I can force popup window transparency in anything I build
myself but this does not help GNOME's CSD applications.

There is a rough workaround that allows use of CSD applications, forces
square corners and you have to align the mouse with a 1px margin to
resize but it works and splits out menu popup windows to get normal
shadows. You do get a shadow around a CSD apps-ouside the black margin.
Setting that to zero means no resize except from the header bar, so it
must be set to 1 and a 1px black border is added to the shadow.

These two sections in a gtk theme will do it, but you still cannot have
round corners:

 .window-frame.csd {
border-radius: 7px;
border-width: 2px;
margin: 1px;
box-shadow: 0 2px 2px 3px alpha(black, 0.5); 
}

.window-frame, .window-frame.csd.popup,  .window-frame.csd.message-dialog {
border-radius: 7px;
border-width: 2px;
margin: 1px;
box-shadow: none; 
/* This shadow will appear on cairo-dock popups if you use it, the 
workaround
is to create a file called menu.css in 
~/config/cairo-dock/current_theme, copy
the above lines into it, and change the shadow to all zeroes and an 
alpha of 0.0 */
}

I will continue to follow and test this but for normal use will keep my
one-off build of the previous version of compiz with the patches that DO
fix all of this.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I just build compiz from the compiz-0.9.12.1+15.10.20150805 source code
on Debian Unstable and gtk3.17. It built fine if I disabled Google
protocol buffers, which Cmake lists as giving faster XML loading only.
The Ubuntu packages build from this could not be installed because that
dependency is not installable right now. My build went fine and ran when
compiz was restarted.

Two of the three issues were fixed but one remains: the gtk-window-
decorator works fine now, and the transparent calendars and menus in my
hacked version of Mate-panel worked perfectly. Unfortunately, issues
with CSD applications are NOT fixed, at least not in gtk3.17. I got
black borders out to the margin set by the windows rather than
compositing of client-side decorated windows. The test program was
gnome-disks, it yielded ugly black borders all the way around.

By comparison, my normal build of compiz from the older 0.9.12.0 add-
gtk-frame-extents-to-net-supported source with the gtk directory
replaced with that from  compiz_0.9.12.1+15.10.20150627.1.orig.tar.gz
works fine with CSD applications, rendering the rounded corners just
fine with normal compositing. Not only that, the build with gcc 4.9
still works even after the gcc5 transition.  I will use this until the
newest version fixes the CSD issue, I don't know if this is unique to
gtk3.17 right now or somehow related to my build not using the protocol
buffers. That I will find out when I can install the offending program
without removing Inkscape.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Stephen M. Webb]

** Also affects: compiz
   Importance: Undecided
   Status: New

** Changed in: compiz
   Status: New = Fix Committed

** Changed in: compiz
   Importance: Undecided = Medium

** Changed in: compiz (Ubuntu)
   Importance: Undecided = Medium

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu/wily-proposed/compiz

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

Updates as of 7-1-2015:

The latest Uubntu update from 6.27 fixes Metacity theme support but NOT
transparency.   The add-gtk-frame-extents-to-net-supported is based on
0.9.12.0, not 0.9.12.1 and it seems the later version stripped out the
underlying code that permitted the simple published patch to work. I
have not been able to revert that but found another fix: build the older
version with the patch-and with the gtk directory from the current
Ubuntu source substituted. Make sure to enable gsettings in your
configuration or it won't read the theme, and to set /usr and not
/usr/local as the installation directory or compiz will hang up on
loading the plugins. Build, install, and enjoy!

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[luke]

I can now confirm that building and installing the

https://code.launchpad.net/~albertsmuktupavels/compiz/add-gtk-frame-
extents-to-net-supported

compiz branch solves the problem, as far as I can tell solving it
entirely.

At the moment I am running Debian Unstable, using the Ubuntu PPA kernel
and Mesa on Radeon graphics, this version of compiz, and mate compiled
with gtk3.16 hacked for semi-transparent panel menus. Transparency  in
the panel menus works perfectly, and CSD apps render and can be resized
just as if they were running in gnome-shell.  Looks like this simple
change to src/screen.cpp did it, now there is another issue that comes
from Metacity.

Neither this branch nor the main compiz branch will build the gtk window
decorator with Metacity 3.17 installed, so Emerald must be used for
window decoration (I don't have the kde development files installed to
build the kde window decorator) at least on my current setup.  build
metacity and build gtk must both be disabled or the build errors out.

Given that Metacity itself no longer supports metacity themes I am not
sure that can be fixed unless Compiz is to support using the theme set
for csd in the gtk theme. Then the decoration will be much too tall.

There is a way get your old window decoration theme back in Emerald. If
you have MATE installed you can run marco --replace to screenshot your
old metacity theme, then use png files of sections of the decoration to
copy your theme in Emerald's pixmap engine.

Long term options I see are this:

1: Rewrite Metacity support to use current Metacity and read the css
theme, not the legacy metacity themes

2: Replace Metacity support with Marco support. Most compiz installs
needing gtk-window-decorator are in Unity or MATE. This would introduce
Marco as a build dependency of compiz and thus unity.

3: Split out Marco support and Unity support, have Unity include its own
window decorator. Code could be exactly the same, but this removes an
external dependency from Unity.

4: Dump Metacity support, take over Emerald mantainance instead.  Update
Emerald theme engines or just create Emerald themes to march distro
default themes.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

** Branch linked: lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-
to-net-supported

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

If I understand correctly than this is compiz bug. Compiz should add
_GTK_FRAME_EXTENTS to _NET_SUPPORTED.

https://git.gnome.org/browse/gtk+/commit/?id=5ced234144ce63decbf5afc8a3517290b9027018

Reverting above GTK+ commit should fix csd windows, but real fix is to
add _GTK_FRAME_EXTENTS support to compiz.

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[Bug 1436553] Re: Transparent windows render black with Gtk3.16 and compiz

[Alberts Muktupāvels]

** Branch linked: lp:~albertsmuktupavels/compiz/add-gtk-frame-extents-
to-net-supported

** Branch linked: lp:~3v1n0/compiz/client-frame-api

** Changed in: compiz (Ubuntu)
   Status: New = Confirmed

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