Remove the manually written GL dispatch code, and use libepoxy
to resolve functions.
The only exceptions are GLX_MESA_swap_control, which is not in
the XML API registry, and GL_ARB_robustness/GL_EXT_robustness.
For the latter we want to resolve the functions to the same names
on both GLES and desktop GL, and plug in our own implementations
when the extension is not supported.
Completing the task of replacing all NULL to nullptr in all the files in
libkwineffects folder.
(also substituting some "0" used as nullptr with nullptr)
REVIEW: 114823
Prevents the possiblity of using shaders modified for color correction
without valid data from KolorManager. If that happened, everthing
blacked out.
Now the color correction shaders are enabled only after successfuly
contacting KolorManager.
The issue was highlighted after ab7e228d.
BUG: 321217
Checks are now performed for GL errors and in case of errors everything
is aborted. The error handling mechanism introduced for this purpose
somewhat improves the color correction code.
Fix gl invalid operation in color correction, when first setting up the
lookup texture uniform.
REVIEW: 107754
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.
Before painting for a particular screen, ColorCorrection::setupForOutput
should be called.
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 correction. This happens only when color correction is enabled, of
course.
For D-Bus communication with KolorServer, everything is async.
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.
This commit reintroduces the changes from the former merge with the
"color2" branch. In this form, it can be easily reverted.
REVIEW: 106141
This merge is incomplete and it does not include the review number of
the associated review request. It should have been pushed as a single
commit, because the merged commits were not intended to be published in
their form.
This reverts commit dcba90263069a221a5489b1915c5cf1ca39d090c, reversing
changes made to 50ae07525c7fde07794e7548c3d6e5a69cb1a89d.
Conflicts:
kwin/scene_opengl.cpp
kwin/scene_opengl.h
The implementation consists of a class in libkwineffects.
There are some slight modifications in the compositor. Regions for
different outputs are drawn at different times.
Currently only per output color correction is implemented. However, the
grounds are prepared for implementing per window color correction
easily.
The ColorCorrection class needs to communicate via D-Bus with a KDED
module, KolorServer, which is a part of KolorManager.
The only visible part for the user consists of a check box in the
advanced tab for the compositing KCM.
The actual correction is done by injecting a piece of code in the
fragment shader, code that does a 3D lookup into a special color lookup
texture. The data for these textures is obtained from KolorServer. All
D-Bus calls are async.
Fredrik Höglund