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List: kwin
Subject: Re: Review Request: Implement color correction (per output)
From: "Kai-Uwe Behrmann" <ku.b () gmx ! de>
Date: 2012-10-25 19:21:49
Message-ID: 20121025192149.7868.20816 () vidsolbach ! de
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> On Oct. 25, 2012, 5:59 p.m., Martin Gr=C3=A4=C3=9Flin wrote:
> > Today is soft feature freeze. If you want to get this into 4.10 it need=
s to end on the feature plan today.
added here: http://techbase.kde.org/Schedules/KDE4/4.10_Feature_Plan
- Kai-Uwe
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/106141/#review20905
-----------------------------------------------------------
On Sept. 23, 2012, 12:53 p.m., Casian Andrei wrote:
> =
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/106141/
> -----------------------------------------------------------
> =
> (Updated Sept. 23, 2012, 12:53 p.m.)
> =
> =
> Review request for kwin, Thomas L=C3=BCbking and Martin Gr=C3=A4=C3=9Flin.
> =
> =
> Description
> -------
> =
> These are the results of my GSoC project, for KWin.
> =
> This color correction needs KolorManager installed, 'kded' branch. That o=
ne needs Oyranos.
> git://anongit.kde.org/kolor-manager.git http://www.oyranos.org/do=
wnloads
> If it's not installed, the ColorCorrection class should fail without caus=
ing any issues to the user (that's if it's enabled from the KCM). Probably =
a notification could be appropriate in that case? "Failed to initialize CC =
because cannot contact Kolor-Server KDED..." something like that?
> =
> Change summary:
> --
> Add an option to kcmcompositing in the 'Advanced' tab, to enable or disab=
le color correction. It is specified that it's experimental and it needs Ko=
lor Manager. This implies some small changes to options.h and cpp.
> =
> In composite.cpp, the ColorCorrection class instance is initialized or cl=
eaned up (it's like being owned by the compositor). In workspace, there's a=
signal connected to reset compositing if the color correction setting is c=
hanged.
> =
> Scene::finalPaintWindow code is moved into SceneOpenGL::performPaint.
> SceneOpenGL has the declarations of some methods changed to include the s=
creen number - those could be changed to pass around PaintData's probably. =
SceneOpenGL's newly implemented finalDrawWindow splits the rendering if col=
or correction is enabled and there are multiple screens. Before painting fo=
r a particular screen, ColorCorrection::setupForOutput should be called.
> =
> There was a problem with the blending function causing artifacts with col=
or correction enabled so it is set up to src_alpha, one_minus_src alpha in =
that case.
> =
> Now, inside KWinEffects:
> --
> A screen property is added for WindowPaintData.
> In kwinglutils, The fragment shaders are intercepted before being compile=
d and they get a couple of lines of code inserted in order to do the color =
stuff. This happens only when color correction is enabled, of course.
> =
> And there is the big ColorCorrection class. The public and private stuff =
are well separated. More additions to the public stuff shouldn't be necessa=
ry in the future as far as I see it. Everything is there I think. The regio=
n stuff is not used at the moment, and the 2 reset methods aren't used eith=
er (for now).
> =
> The private stuff consists of the private data and the D-Bus interface. R=
egarding D-Bus, everything is async (I think).
> =
> The implementation basically manages a set of color lookup tables for dif=
ferent outputs and for different window regions. These are taken via D-Bus.=
Each lookup table has around 700 KB. I hope I am not wrong in assuming it'=
s not that big of an issue time-wise, since they are transferred only once =
or twice for an entire session. I hope D-Bus doesn't do any time consuming =
business to transfer those QVector's.
> =
> There is an issue with OpenGL ES, apparently it doesn't support 3D textur=
es (probably it needs an extension or something). Until we envision a clear=
solution, I have disabled the color correction for OpenGL ES.
> =
> In case of problems, it should not affect the rest of KWin in any way.
> =
> Next priorities:
> --
> Implement per-window-region stuff. It should be a matter of extending Kol=
orServer's capabilities and doing some small modifications in SceneOpenGL::=
Window. The ColorCorrection class from KWinEffects has everything prepared.
> =
> Fix issues with transparency / some weird colors.
> =
> --
> There's another thing... I don't know when I'm supposed to be able to do =
improvements and modifications, since the GSoC project ended. Probably if I=
keep the new modifications well separated, there should be no issues.
> =
> =
> Diffs
> -----
> =
> kwin/kcmkwin/kwincompositing/main.cpp 7a89db4 =
> kwin/kcmkwin/kwincompositing/main.ui cff0f63 =
> kwin/libkwineffects/CMakeLists.txt 14a2747 =
> kwin/libkwineffects/kwineffects.h 2c2f7bf =
> kwin/libkwineffects/kwineffects.cpp bae85e7 =
> kwin/libkwineffects/kwinglcolorcorrection.h PRE-CREATION =
> kwin/libkwineffects/kwinglcolorcorrection.cpp PRE-CREATION =
> kwin/libkwineffects/kwinglcolorcorrection_p.h PRE-CREATION =
> kwin/libkwineffects/kwinglplatform.h 14555a2 =
> kwin/libkwineffects/kwinglplatform.cpp 26341e4 =
> kwin/libkwineffects/kwinglutils.h 14fdd5b =
> kwin/libkwineffects/kwinglutils.cpp 5abae52 =
> kwin/options.h 3acc17d =
> kwin/options.cpp cd96e1b =
> kwin/scene-fragment.glsl 4b5424b =
> kwin/scene.h be3acc4 =
> kwin/scene.cpp 28136b6 =
> kwin/scene_opengl.h 8ff0006 =
> kwin/scene_opengl.cpp 3e4290a =
> =
> Diff: http://git.reviewboard.kde.org/r/106141/diff/
> =
> =
> Testing
> -------
> =
> Restarted KDED making sure Kolor-Manager is installed properly - this sho=
uld make the KDED module available.
> =
> Restarted KWin, enabled color correction in KCM compositing, advanced tab.
> =
> Played a bit with commands like:
> oyranos-monitor -d 0 XYZ.icc
> oyranos-monitor -d 1 Lab.icc
> Those set up particular profiles for the monitors. However, it seems ther=
e is a problem with reverting to the normal ones. The code regarding that i=
s taken directly from CompICC, so I don't know whether it's a bug or a feat=
ure. Anyway, it's from Kolor-Server.
> =
> Apparently, everything works as planned. But I cannot distinguish visible=
differences for the profiles used for the different monitors by default.
> =
> There is an issue with the transparent areas - they are darkened somehow.=
This should be easy to fix, I have left the issue around because I hadn't =
time to finish before the GSoC deadline and it makes it possible to quickly=
find out whether color correction is enabled or not :). Perhaps, it's beca=
use of the blending function and not because of the correction. Also, there=
's something wrong with the highlights in gitk, I don't know exactly what. =
So, small issues are present.
> =
> =
> Screenshots
> -----------
> =
> Output 0 Lab.icc Output 1 XYZ.icc
> http://git.reviewboard.kde.org/r/106141/s/695/
> =
> =
> Thanks,
> =
> Casian Andrei
> =
>
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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/106141/">http://git.reviewboard.kde.org/r/106141/</a>
</td>
</tr>
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<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On October 25th, 2012, 5:59 p.m., <b>Martin \
Gräßlin</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;"> <pre style="white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Today is soft feature freeze. If you want to get this into 4.10 it needs \
to end on the feature plan today.</pre> </blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">added here: \
http://techbase.kde.org/Schedules/KDE4/4.10_Feature_Plan</pre> <br />
<p>- Kai-Uwe</p>
<br />
<p>On September 23rd, 2012, 12:53 p.m., Casian Andrei wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" \
style="background-image: \
url('http://git.reviewboard.kde.org/media/rb/images/review_request_box_top_bg.png'); \
background-position: left top; background-repeat: repeat-x; border: 1px black \
solid;"> <tr>
<td>
<div>Review request for kwin, Thomas Lübking and Martin Gräßlin.</div>
<div>By Casian Andrei.</div>
<p style="color: grey;"><i>Updated Sept. 23, 2012, 12:53 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">These are the results of my GSoC project, for KWin.
This color correction needs KolorManager installed, 'kded' branch. That one \
needs Oyranos. git://anongit.kde.org/kolor-manager.git \
http://www.oyranos.org/downloads If it's not installed, the ColorCorrection class \
should fail without causing any issues to the user (that's if it's enabled \
from the KCM). Probably a notification could be appropriate in that case? \
"Failed to initialize CC because cannot contact Kolor-Server KDED..." \
something like that?
Change summary:
--
Add an option to kcmcompositing in the 'Advanced' tab, to enable or disable \
color correction. It is specified that it's experimental and it needs Kolor \
Manager. This implies some small changes to options.h and cpp.
In composite.cpp, the ColorCorrection class instance is initialized or cleaned up \
(it's like being owned by the compositor). In workspace, there's a signal \
connected to reset compositing if the color correction setting is changed.
Scene::finalPaintWindow code is moved into SceneOpenGL::performPaint.
SceneOpenGL has the declarations of some methods changed to include the screen number \
- those could be changed to pass around PaintData's probably. SceneOpenGL's \
newly implemented finalDrawWindow splits the rendering if color correction is enabled \
and there are multiple screens. Before painting for a particular screen, \
ColorCorrection::setupForOutput should be called.
There was a problem with the blending function causing artifacts with color \
correction enabled so it is set up to src_alpha, one_minus_src alpha in that case.
Now, inside KWinEffects:
--
A screen property is added for WindowPaintData.
In kwinglutils, The fragment shaders are intercepted before being compiled and they \
get a couple of lines of code inserted in order to do the color stuff. This happens \
only when color correction is enabled, of course.
And there is the big ColorCorrection class. The public and private stuff are well \
separated. More additions to the public stuff shouldn't be necessary in the \
future as far as I see it. Everything is there I think. The region stuff is not used \
at the moment, and the 2 reset methods aren't used either (for now).
The private stuff consists of the private data and the D-Bus interface. Regarding \
D-Bus, everything is async (I think).
The implementation basically manages a set of color lookup tables for different \
outputs and for different window regions. These are taken via D-Bus. Each lookup \
table has around 700 KB. I hope I am not wrong in assuming it's not that big of \
an issue time-wise, since they are transferred only once or twice for an entire \
session. I hope D-Bus doesn't do any time consuming business to transfer those \
QVector's.
There is an issue with OpenGL ES, apparently it doesn't support 3D textures \
(probably it needs an extension or something). Until we envision a clear solution, I \
have disabled the color correction for OpenGL ES.
In case of problems, it should not affect the rest of KWin in any way.
Next priorities:
--
Implement per-window-region stuff. It should be a matter of extending \
KolorServer's capabilities and doing some small modifications in \
SceneOpenGL::Window. The ColorCorrection class from KWinEffects has everything \
prepared.
Fix issues with transparency / some weird colors.
--
There's another thing... I don't know when I'm supposed to be able to do \
improvements and modifications, since the GSoC project ended. Probably if I keep the \
new modifications well separated, there should be no issues.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Restarted KDED making sure Kolor-Manager is installed properly - this \
should make the KDED module available.
Restarted KWin, enabled color correction in KCM compositing, advanced tab.
Played a bit with commands like:
oyranos-monitor -d 0 XYZ.icc
oyranos-monitor -d 1 Lab.icc
Those set up particular profiles for the monitors. However, it seems there is a \
problem with reverting to the normal ones. The code regarding that is taken directly \
from CompICC, so I don't know whether it's a bug or a feature. Anyway, \
it's from Kolor-Server.
Apparently, everything works as planned. But I cannot distinguish visible differences \
for the profiles used for the different monitors by default.
There is an issue with the transparent areas - they are darkened somehow. This should \
be easy to fix, I have left the issue around because I hadn't time to finish \
before the GSoC deadline and it makes it possible to quickly find out whether color \
correction is enabled or not :). Perhaps, it's because of the blending function \
and not because of the correction. Also, there's something wrong with the \
highlights in gitk, I don't know exactly what. So, small issues are present. \
</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kwin/kcmkwin/kwincompositing/main.cpp <span style="color: \
grey">(7a89db4)</span></li>
<li>kwin/kcmkwin/kwincompositing/main.ui <span style="color: \
grey">(cff0f63)</span></li>
<li>kwin/libkwineffects/CMakeLists.txt <span style="color: \
grey">(14a2747)</span></li>
<li>kwin/libkwineffects/kwineffects.h <span style="color: \
grey">(2c2f7bf)</span></li>
<li>kwin/libkwineffects/kwineffects.cpp <span style="color: \
grey">(bae85e7)</span></li>
<li>kwin/libkwineffects/kwinglcolorcorrection.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kwin/libkwineffects/kwinglcolorcorrection.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kwin/libkwineffects/kwinglcolorcorrection_p.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kwin/libkwineffects/kwinglplatform.h <span style="color: \
grey">(14555a2)</span></li>
<li>kwin/libkwineffects/kwinglplatform.cpp <span style="color: \
grey">(26341e4)</span></li>
<li>kwin/libkwineffects/kwinglutils.h <span style="color: \
grey">(14fdd5b)</span></li>
<li>kwin/libkwineffects/kwinglutils.cpp <span style="color: \
grey">(5abae52)</span></li>
<li>kwin/options.h <span style="color: grey">(3acc17d)</span></li>
<li>kwin/options.cpp <span style="color: grey">(cd96e1b)</span></li>
<li>kwin/scene-fragment.glsl <span style="color: grey">(4b5424b)</span></li>
<li>kwin/scene.h <span style="color: grey">(be3acc4)</span></li>
<li>kwin/scene.cpp <span style="color: grey">(28136b6)</span></li>
<li>kwin/scene_opengl.h <span style="color: grey">(8ff0006)</span></li>
<li>kwin/scene_opengl.cpp <span style="color: grey">(3e4290a)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/106141/diff/" style="margin-left: \
3em;">View Diff</a></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Screenshots </h1>
<div>
<a href="http://git.reviewboard.kde.org/r/106141/s/695/"><img \
src="http://git.reviewboard.kde.org/media/uploaded/images/2012/08/23/cc_alter_6_400x100.png" \
style="border: 1px black solid;" alt="Output 0 Lab.icc Output 1 XYZ.icc" /></a>
</div>
</td>
</tr>
</table>
</div>
</body>
</html>
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