Weston terminal has a shadow effect.

Me: I want the same thing for my Qt app!
Weston: No
Weston (hesitantly): But you can draw it by yourself

• https://gitlab.freedesktop.org/wayland/weston/-/issues/266
• https://github.com/mpv-player/mpv/pull/7186
• https://gitlab.gnome.org/GNOME/mutter/-/issues/158

In other words, trying to add shadow effect to Qt app in Weston is bleeding edge technologies. As always.

• https://www.qt.io/blog/2018/12/14/whats-new-wayland-platform-plugin-qt-5-12
• https://www.qt.io/blog/custom-window-decorations

Before we start. Here is more shadow examples:

• Liri desktop https://twitter.com/liridev
• Proposed to GNOME https://gitlab.gnome.org/GNOME/gtk/-/issues/1357

Window flags

https://doc.qt.io/qt-5/qtwidgets-widgets-windowflags-example.html

Wayland Decoration Plugin

Qt Wayland decoration plugin bradient https://lists.qt-project.org/pipermail/development/2015-November/023663.html

• material from qtintegration (Liri OS) https://github.com/lirios/qtintegration/blob/develop/src/plugins/decorations/material/materialdecoration.cpp
• material from Papyros Shell https://github.com/indraneeldutta/Indistro/blob/c0d6e3e6c4eaffe9857edd5cc8ff1659b79a833b/decorations/main.cpp

QT_WAYLAND_DECORATION=material

Window property

window->sendProperty("drawServerShadow", "true");

Client side decoration (CSD)

QT_WAYLAND_DISABLE_WINDOWDECORATION

• https://github.com/WayfireWM/wayfire/issues/437
• https://git.sailfishos.org/faenil/qtwayland/commit/77248e2765e4db5cd7fe6e53e07a612d75b91011?view=parallel