We ignore the name/description and only display the id in the ui.
To make sure the is are the same, the OUTPUT_NAME cmake target property is set.
Otherwise, we would need a json file with the KPlugin object and then the id in it, which is
unnecessary work for sth. that can be done in a single line.
Having the file base name and id differ is also discouraged, see https://phabricator.kde.org/T14499
WId is irrelevant on Wayland and it doesn't fully describe everything we
might be doing, we can pass a variant map to make sure all necessary
information is provided.
Previously used x11 plugin does not compile with Qt5, because Qt5 does
not use Xlib, it uses xcb. Rewrite screen capture plugin from Xlib to
xcb.
I made xcb libs compile required dependency, but availability of X
shared memory extension is checked at runtime. It is used to effectively
get image pixels data, instead of transfering 8Mb over the wire. Xdamage
is used to limit image getting operations only within actually changed
rectangles of screen.
BUG: 377998
Tested on single-monitor system and dual-monitor, where primary monitor
does not start at (0,0) coordinate. Image transfer works fine.
Dual-monitor only has problems with receiving mouse cursor position and
clicks, but this should be fixed outside of framebuffer plugin.
Differential Revision: https://phabricator.kde.org/D5211
