wayland/screencopy: add screencopy

BUILD.md

@@ -130,6 +130,24 @@ which allows quickshell to be used as a session lock under compatible wayland co
 
 To disable: `-DWAYLAND_TOPLEVEL_MANAGEMENT=OFF`
 
+#### Screencopy
+Enables streaming video from monitors and toplevel windows through various protocols.
+
+To disable: `-DSCREENCOPY=OFF`
+
+Dependencies:
+- `libdrm`
+- `libgbm`
+
+Specific protocols can also be disabled:
+- `DSCREENCOPY_ICC=OFF` - Disable screencopy via [ext-image-copy-capture-v1]
+- `DSCREENCOPY_WLR=OFF` - Disable screencopy via [zwlr-screencopy-v1]
+- `DSCREENCOPY_HYPRLAND_TOPLEVEL=OFF` - Disable screencopy via [hyprland-toplevel-export-v1]
+
+[ext-image-copy-capture-v1]:https://wayland.app/protocols/ext-image-copy-capture-v1
+[zwlr-screencopy-v1]: https://wayland.app/protocols/wlr-screencopy-unstable-v1
+[hyprland-toplevel-export-v1]: https://wayland.app/protocols/hyprland-toplevel-export-v1
+
 ### X11
 This feature enables x11 support. Currently this implements panel windows for X11 similarly
 to the wlroots layershell above.

CMakeLists.txt

@@ -56,6 +56,10 @@ boption(HYPRLAND_IPC "    Hyprland IPC" ON REQUIRES HYPRLAND)
 boption(HYPRLAND_GLOBAL_SHORTCUTS "    Hyprland Global Shortcuts" ON REQUIRES HYPRLAND)
 boption(HYPRLAND_FOCUS_GRAB "    Hyprland Focus Grabbing" ON REQUIRES HYPRLAND)
 boption(HYPRLAND_SURFACE_EXTENSIONS "    Hyprland Surface Extensions" ON REQUIRES HYPRLAND)
+boption(SCREENCOPY "  Screencopy" ON REQUIRES WAYLAND)
+boption(SCREENCOPY_ICC "    Image Copy Capture" ON REQUIRES WAYLAND)
+boption(SCREENCOPY_WLR "    Wlroots Screencopy" ON REQUIRES WAYLAND)
+boption(SCREENCOPY_HYPRLAND_TOPLEVEL "    Hyprland Toplevel Export" ON REQUIRES WAYLAND)
 boption(X11 "X11" ON)
 boption(I3 "I3/Sway" ON)
 boption(I3_IPC "  I3/Sway IPC" ON REQUIRES I3)
@@ -70,7 +74,7 @@ boption(SERVICE_NOTIFICATIONS "Notifications" ON)
 include(cmake/install-qml-module.cmake)
 include(cmake/util.cmake)
 
-add_compile_options(-Wall -Wextra)
+add_compile_options(-Wall -Wextra -Wno-vla-cxx-extension)
 
 # pipewire defines this, breaking PCH
 add_compile_definitions(_REENTRANT)

default.nix

@@ -14,6 +14,8 @@
   jemalloc,
   wayland,
   wayland-protocols,
+  libdrm,
+  libgbm,
   xorg,
   pipewire,
   pam,
@@ -64,7 +66,7 @@
   ++ lib.optional withCrashReporter breakpad
   ++ lib.optional withJemalloc jemalloc
   ++ lib.optional withQtSvg qt6.qtsvg
-  ++ lib.optionals withWayland [ qt6.qtwayland wayland ]
+  ++ lib.optionals withWayland [ qt6.qtwayland wayland libdrm libgbm ]
   ++ lib.optional withX11 xorg.libxcb
   ++ lib.optional withPam pam
   ++ lib.optional withPipewire pipewire;

src/wayland/CMakeLists.txt

@@ -103,6 +103,13 @@ if (WAYLAND_TOPLEVEL_MANAGEMENT)
 	list(APPEND WAYLAND_MODULES Quickshell.Wayland._ToplevelManagement)
 endif()
 
+if (SCREENCOPY)
+	add_subdirectory(buffer)
+	add_subdirectory(screencopy)
+	list(APPEND WAYLAND_MODULES Quickshell.Wayland._Screencopy)
+endif()
+
+
 if (HYPRLAND)
 	add_subdirectory(hyprland)
 endif()

src/wayland/buffer/CMakeLists.txt

@@ -0,0 +1,18 @@
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(dmabuf-deps REQUIRED IMPORTED_TARGET libdrm gbm egl)
+
+qt_add_library(quickshell-wayland-buffer STATIC
+	manager.cpp
+	dmabuf.cpp
+	shm.cpp
+)
+
+wl_proto(wlp-linux-dmabuf linux-dmabuf-v1 "${WAYLAND_PROTOCOLS}/stable/linux-dmabuf")
+
+target_link_libraries(quickshell-wayland-buffer PRIVATE
+	Qt::Quick Qt::WaylandClient Qt::WaylandClientPrivate wayland-client
+	PkgConfig::dmabuf-deps
+	wlp-linux-dmabuf
+)
+
+qs_pch(quickshell-wayland-buffer SET large)