[Feedback needed] Get colors from unsupported wallpaper plugins by taking a screenshot of the desktop view

[luisbocanegra]

Is your feature request related to a problem? Please describe. Currently, the current wallpaper information is obtained using Plasma Scripting API, but only works if the wallpaper plugin itself stores the value of the current wallpaper (like an image path or color)

Describe the solution you'd like Find a way to grab a screenshot of the desktop view

• [x] Should work completely in the background
• [x] Should work without user intervention
• [x] Should capture the desktop only (not panels)
• [x] #165

Todo

• [x] Finding the desktop window:
  • Using the KWin Scripting API directly (preferred)
• [x] Taking screenshot of the desktop window
  • With dbus using org.kde.KWin /org/kde/KWin/ScreenShot2 org.kde.KWin.ScreenShot2.CaptureWindow
• [x] Implement as fallback when wallpaper plugin fails

Additional context BUG:449986 - Spectacle: New capture mode: Window by properties

[luisbocanegra]

So there is this KWin plugin https://github.com/KDE/kwin/tree/master/src/plugins/screenshot which is used to take screenshots by Spectacle. After reading https://github.com/KDE/kwin/blob/master/src/plugins/screenshot/org.kde.KWin.ScreenShot2.xml and a bit of trial and error 😆 managed to get a POC script working 🎉

[luisbocanegra]

Testing is needed to ensure this works as expected for the new release:

First clone and run the main branch

git clone https://github.com/luisbocanegra/kde-material-you-colors
export PYTHONPATH=/home/luis/projects/kde-material-you-colors/src:$PYTHONPATH
python -m kde_material_you_colors.main

Try setting different wallpaper plugins that are not supported in previous releases like "Hunyango" and it should pick the colors from it.

To control how often screenshots are taken please refer to the end of the sample configuration file https://github.com/luisbocanegra/kde-material-you-colors/blob/main/src/kde_material_you_colors/data/sample_config.conf