Preliminary Wayland support

Summary

• It doesn't crash anymore
• Requires a wlroots-based compositor (as other Xfce components)
• Fullscreen capture works using wlr-screencopy (tested with Wayfire and Labwc)
• Rectangle region will be implemented in another MR
  • Probably we'll need to use wlr-layer-shell to create an overlay layer
  • gtk-layer-shell looks interesting
• Active Window region is disabled, the screencopy protocol doesn't support single windows at the moment (issue)
  • I'm not sure if there is a way to accomplish that under Wayland, the last resort will be a custom protocol for our compositor

TODO

• Better error handling, show messages to user
• Support multi-monitor
• Add support to region selection mode → out of scope for this MR
• Disable features not supported by the wlr screencopy protocol, i.e. active window and whether to capture border
• How to test image conversion beyond the ABGR8888 format (the one used by wlroots) → Hopefully the code works, if not we'll receive bug reports
• Clean up wayland objects (call destroy for buffer, screencopy_manager, shm, etc)
• Test panel plugin
• Check for memory leaks

added 5. Wayland label

assigned to @andreldm

mentioned in issue #46 (closed)

Build broke when compiling protocols, works on my machine™, @Tamaranch any idea of what's going on with CI?

added 2 commits

• 666213b8 - Fix build
• e98a5524 - Use git submodule for protocols & more fixes

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resolved all threads

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added 1 commit

• f64f8d8a - Better error reporting & fewer leaks

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added 1 commit

• 3e50b359 - Use g_abort instead of abort

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marked the checklist item Better error handling, show messages to user as completed

resolved all threads

marked the checklist item Clean up wayland objects (call destroy for buffer, screencopy_manager, shm, etc) as completed

marked the checklist item Disable features not supported by the wlr screencopy protocol, i.e. active window and whether to capture border as completed

added 2 commits

• dcb6238e - Disable Active Window region in Wayland
• a8d51834 - Slightly better error messages

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changed the description

changed the description

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marked the checklist item Add support to region selection mode out of scope for this MR as completed