new(src,cmake): add initial support for kwin output-management wayland protocol for gamma correction

CMakeLists.txt

@@ -7,6 +7,10 @@ set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
 include(GNUInstallDirs)
 find_package(PkgConfig)
 
+# Add path for custom CMake modules.
+list(APPEND CMAKE_MODULE_PATH
+	"${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
+
 execute_process(
         COMMAND git log -1 --format=%h
         WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
@@ -50,7 +54,7 @@ list(APPEND COMBINED_LDFLAGS ${LOGIN_LIBS_LDFLAGS})
 # Optional dependencies
 
 # Needed to eventually build wayland protocols
-add_subdirectory(protocol)
+include(WaylandProtocols)
 
 # Helper macro for dealing correctly with optional pkg-config dependencies.
 # There are a number of issues when using pkg-config with cmake (as compared to
@@ -98,9 +102,9 @@ macro(optional_dep name modules description)
     endif()
 endmacro()
 
-optional_dep(GAMMA "x11;xrandr;libdrm;wayland-client" "Gamma correction" src/modules/gamma_plugins protocol/wlr-gamma-control-unstable-v1.xml)
-optional_dep(DPMS "x11;xext;libdrm;wayland-client" "DPMS" src/modules/dpms_plugins protocol/org_kde_kwin_dpms.xml;protocol/wlr-output-power-management-unstable-v1.xml)
-optional_dep(SCREEN "x11" "screen emitted brightness" src/modules/screen_plugins protocol/wlr-screencopy-unstable-v1.xml)
+optional_dep(GAMMA "x11;xrandr;libdrm;wayland-client" "Gamma correction" src/modules/gamma_plugins https://gitlab.freedesktop.org/wlroots/wlr-protocols/-/raw/master/unstable/wlr-gamma-control-unstable-v1.xml;https://raw.githubusercontent.com/KDE/plasma-wayland-protocols/master/src/protocols/outputdevice.xml;https://raw.githubusercontent.com/KDE/plasma-wayland-protocols/master/src/protocols/output-management.xml)
+optional_dep(DPMS "x11;xext;libdrm;wayland-client" "DPMS" src/modules/dpms_plugins https://raw.githubusercontent.com/KDE/plasma-wayland-protocols/master/src/protocols/dpms.xml;https://gitlab.freedesktop.org/wlroots/wlr-protocols/-/raw/master/unstable/wlr-output-power-management-unstable-v1.xml)
+optional_dep(SCREEN "x11" "screen emitted brightness" src/modules/screen_plugins https://gitlab.freedesktop.org/wlroots/wlr-protocols/-/raw/master/unstable/wlr-screencopy-unstable-v1.xml)
 optional_dep(DDC "ddcutil>=0.9.5" "external monitor backlight")
 optional_dep(YOCTOLIGHT "libusb-1.0" "Yoctolight usb als devices support")
 optional_dep(PIPEWIRE "libpipewire-0.3" "Enable pipewire camera sensor support")

TODO.md

@@ -35,6 +35,7 @@
 ### Generic
 - [ ] Drop is_smooth options for gamma
 - [ ] avoid returning boolean where it does not make sense
+- [ ] Rename Wl to Wlr (wlroots) in interfaces
 
 ## Ideas
 - [ ] follow ddcci kernel driver and in case, drop ddcutil and add the kernel driver as clightd opt-dep

protocol/CMakeLists.txt → cmake/modules/WaylandProtocols.cmake

@@ -1,13 +1,19 @@
-# Stolen from: https://github.com/giucam/orbital/blob/512c1b3b20a32cf67ba326e8acce3c1c32e11fa2/cmake/Wayland.cmake, thanks!
+include(FetchContent)
+
 function(WAYLAND_ADD_PROTOCOL_CLIENT protocol)
     find_program(WAYLAND_SCANNER_EXECUTABLE NAMES wayland-scanner REQUIRED)
 
     get_filename_component(proto_name ${protocol} NAME_WLE)
-    get_filename_component(proto_fullpath ${protocol} ABSOLUTE)
+    FetchContent_Declare(${proto_name} URL ${protocol} DOWNLOAD_NO_EXTRACT TRUE)
+    FetchContent_Populate(${proto_name})
+
     message(STATUS "Enabled '${proto_name}' wayland client protocol")
 
-    set(_client_header "${CMAKE_CURRENT_BINARY_DIR}/${proto_name}-client-protocol.h")
-    set(_code "${CMAKE_CURRENT_BINARY_DIR}/${proto_name}-protocol.c")
+    set(_client_header "${${proto_name}_BINARY_DIR}/${proto_name}-client-protocol.h")
+    set(_code "${${proto_name}_BINARY_DIR}/${proto_name}-protocol.c")
+    # set(_client_header "${CMAKE_CURRENT_BINARY_DIR}/${proto_name}-client-protocol.h")
+    # set(_code "${CMAKE_CURRENT_BINARY_DIR}/${proto_name}-protocol.c")
+    set(proto_fullpath "${${proto_name}_SOURCE_DIR}/${proto_name}.xml")
 
     add_custom_command(
         OUTPUT "${_client_header}" "${_code}"
@@ -17,5 +23,6 @@ function(WAYLAND_ADD_PROTOCOL_CLIENT protocol)
     )
 
     target_sources(${PROJECT_NAME} PRIVATE ${_code})
-    target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+    target_include_directories(${PROJECT_NAME} PRIVATE ${${proto_name}_BINARY_DIR})
 endfunction()
+