project('mutter', 'c',
  version: '43.alpha',
  meson_version: '>= 0.55.0',
  license: 'GPLv2+'
)

split_version = meson.project_version().split('.')

# API version, bump each development cycle
libmutter_api_version = '11'

mutter_srcdir = meson.current_source_dir()
mutter_builddir = meson.current_build_dir()

# generic version requirements
fribidi_req = '>= 1.0.0'
glib_req = '>= 2.69.0'
gi_req = '>= 0.9.5'
graphene_req = '>= 1.10.2'
gtk3_req = '>= 3.19.8'
gdk_pixbuf_req = '>= 2.0'
uprof_req = '>= 0.3'
pango_req = '>= 1.46.0'
cairo_req = '>= 1.10.0'
pangocairo_req = '>= 1.20'
gsettings_desktop_schemas_req = '>= 40.alpha'
json_glib_req = '>= 0.12.0'
xcomposite_req = '>= 0.4'
xkbcommon_req = '>= 0.4.3'
xfixes_req = '>= 6'
xi_req = '>= 1.7.4'
xrandr_req = '>= 1.5.0'
libstartup_notification_req = '>= 0.7'
libcanberra_req = '>= 0.26'
libwacom_req = '>= 0.13'
atk_req = '>= 2.5.3'

# optional version requirements
udev_req = '>= 228'
gudev_req = '>= 232'

# wayland version requirements
wayland_server_req = '>= 1.20'
wayland_protocols_req = '>= 1.25'

# native backend version requirements
libinput_req = '>= 1.19.0'
gbm_req = '>= 21.3'

# screen cast version requirements
libpipewire_req = '>= 0.3.33'

# profiler requirements
sysprof_req = '>= 3.37.2'

gnome = import('gnome')
pkg = import('pkgconfig')
i18n  = import('i18n')
fs = import('fs')
cc = meson.get_compiler('c')

add_project_link_arguments(
  cc.get_supported_link_arguments(
    # meson automatically adds -rpath to targets and strips them when they
    # are installed. ld adds a RUNPATH tag for -rpath arguments by default.
    # This makes ld add a RPATH tag instead (as it did some time ago).
    # The reason why we want RPATH and not RUNPATH is that LD_LIBRARY_PATH
    # takes precedence over RUNPATH but not over RPATH. Since we usually run
    # development builds in jhbuild which sets up LD_LIBRARY_PATH this can
    # result in wrong dependencies being picked up by the linker.
    '-Wl,--disable-new-dtags',
  ),
  language : 'c',
)

prefix = get_option('prefix')

bindir = join_paths(prefix, get_option('bindir'))
datadir = join_paths(prefix, get_option('datadir'))
libdir = join_paths(prefix, get_option('libdir'))
libexecdir = join_paths(prefix, get_option('libexecdir'))
includedir = join_paths(prefix, get_option('includedir'))
sysconfdir = get_option('sysconfdir')

pkgname = '@0@-@1@'.format(meson.project_name(), libmutter_api_version)

pkgdatadir = join_paths(datadir, pkgname)
pkglibdir = join_paths(libdir, pkgname)
pkgincludedir = join_paths(includedir, pkgname)

pcdir = join_paths(libdir, 'pkgconfig')

gettext_package = meson.project_name()
localedir = join_paths(datadir, 'locale')

libmutter_name = 'mutter-' + libmutter_api_version

mutter_installed_tests_datadir = join_paths(
  datadir, 'installed-tests', libmutter_name)
mutter_installed_tests_libexecdir = join_paths(
  libexecdir, 'installed-tests', libmutter_name)

m_dep = cc.find_library('m', required: true)
graphene_dep = dependency('graphene-gobject-1.0', version: graphene_req)
gtk3_dep = dependency('gtk+-3.0', version: gtk3_req)
gdk_pixbuf_dep = dependency('gdk-pixbuf-2.0')
pango_dep = dependency('pango', version: pango_req)
cairo_dep = dependency('cairo', version: cairo_req)
cairo_gobject_dep = dependency('cairo-gobject', version: cairo_req)
pangocairo_dep = dependency('pangocairo', version: pangocairo_req)
fribidi_dep = dependency('fribidi', version: fribidi_req)
gsettings_desktop_schemas_dep = dependency('gsettings-desktop-schemas',
                                           version: gsettings_desktop_schemas_req)
glib_dep = dependency('glib-2.0', version: glib_req)
gio_dep = dependency('gio-unix-2.0', version: glib_req)
gio_unix_dep = dependency('gio-unix-2.0', version: glib_req)
gobject_dep = dependency('gobject-2.0', version: glib_req)
gthread_dep = dependency('gobject-2.0', version: glib_req)
gmodule_no_export_dep = dependency('gmodule-no-export-2.0', version: glib_req)
gnome_settings_daemon_dep = dependency('gnome-settings-daemon', required: false)
json_glib_dep = dependency('json-glib-1.0', version: json_glib_req)
xkbcommon_dep = dependency('xkbcommon', version: xkbcommon_req)
ice_dep = dependency('ice')
atk_dep = dependency('atk', version: atk_req)
libcanberra_dep = dependency('libcanberra', version: libcanberra_req)
dbus_dep = dependency('dbus-1')

have_wayland = get_option('wayland')
# For now always require X11 support
have_x11 = true
have_xwayland = have_wayland # for now default to have_wayland
have_x11_client = have_x11 or have_xwayland

if have_xwayland and not have_wayland
  error('XWayland support requires Wayland support enabled')
endif

if not have_wayland and not have_x11
  error('A Wayland/X11 backend must be enabled')
endif

if have_x11_client
  x11_dep = dependency('x11')
  xcomposite_dep = dependency('xcomposite', version: xcomposite_req)
  xcursor_dep = dependency('xcursor')
  xdamage_dep = dependency('xdamage')
  xext_dep = dependency('xext')
  xfixes_dep = dependency('xfixes', version: xfixes_req)
  xi_dep = dependency('xi', version: xi_req)
  xtst_dep = dependency('xtst')
  xkbfile_dep = dependency('xkbfile')
  xkeyboard_config_dep = dependency('xkeyboard-config')
  xkbcommon_x11_dep = dependency('xkbcommon-x11')
  xrender_dep = dependency('xrender')
  x11_xcb_dep = dependency('x11-xcb')
  xrandr_dep = dependency('xrandr', version: xrandr_req)
  xcb_randr_dep = dependency('xcb-randr')
  xcb_res_dep = dependency('xcb-res')
  xinerama_dep = dependency('xinerama')
  xau_dep = dependency('xau')
endif


have_gnome_desktop = get_option('libgnome_desktop')
if have_gnome_desktop
  gnome_desktop_dep = dependency('gnome-desktop-3.0')
endif

have_gl = get_option('opengl')
if have_gl
  gl_dep = dependency('gl')
  gl_libname = get_option('opengl_libname')
endif

have_egl = get_option('egl')
if have_egl
  egl_dep = dependency('egl')
endif

have_glx = get_option('glx') and have_x11_client
if have_glx
  if not have_gl
    error('GLX support requires OpenGL to be enabled')
  endif
endif

have_egl_xlib = have_egl and have_x11_client

have_gles2 = get_option('gles2')
if have_gles2
  gles2_dep = dependency('glesv2')
  gles2_libname = get_option('gles2_libname')

  if not have_egl
    error('GLESv2 support requires EGL to be enabled')
  endif
endif

if have_wayland
  wayland_server_dep = dependency('wayland-server', version: wayland_server_req)
  wayland_client_dep = dependency('wayland-client', version: wayland_server_req)
  wayland_protocols_dep = dependency('wayland-protocols',
                                     version: wayland_protocols_req)
  wayland_egl_dep = dependency('wayland-egl')

  if not have_egl
    error('Wayland support requires EGL to be enabled')
  endif
endif

have_libgudev = get_option('udev')
if have_libgudev
  libudev_dep = dependency('libudev', version: udev_req)
  gudev_dep = dependency('gudev-1.0', version: gudev_req)
  udev_dep = dependency('udev')

  udev_dir = get_option('udev_dir')
  if udev_dir == ''
    udev_dir = udev_dep.get_pkgconfig_variable('udevdir')
  endif
endif

have_libsystemd = get_option('systemd')
libsystemd_dep = dependency('libsystemd', required: have_libsystemd)

have_native_backend = get_option('native_backend')
if have_native_backend
  libdrm_dep = dependency('libdrm')
  libgbm_dep = dependency('gbm', version: gbm_req)
  libinput_dep = dependency('libinput', version: libinput_req)

  if libsystemd_dep.found()
    logind_provider_dep = libsystemd_dep
  else
    logind_provider_dep = dependency('libelogind')
  endif

  if not have_egl
    error('The native backend requires EGL to be enabled')
  endif

  if not have_gles2
    error('The native backend requires GLESv2 to be enabled')
  endif

  if not have_libgudev
    error('The native backend requires udev to be enabled')
  endif
endif

have_egl_device = get_option('egl_device')

have_wayland_eglstream = get_option('wayland_eglstream')
if have_wayland_eglstream
  wayland_eglstream_protocols_dep = dependency('wayland-eglstream-protocols')
  dl_dep = cc.find_library('dl', required: true)

  if not have_wayland
    error('Wayland EGLStream support requires Wayland to be enabled')
  endif
endif

have_sm = get_option('sm')
if have_sm
  sm_dep = dependency('sm')
endif

have_libwacom = get_option('libwacom')
if have_libwacom
  libwacom_dep = dependency('libwacom', version: libwacom_req)
endif

have_pango_ft2 = get_option('pango_ft2')
if have_pango_ft2
  pangoft2_dep = dependency('pangoft2')
endif

have_startup_notification = get_option('startup_notification')
if have_startup_notification
  libstartup_notification_dep = dependency('libstartup-notification-1.0',
                                           version: libstartup_notification_req)
endif

have_remote_desktop = get_option('remote_desktop')
if have_remote_desktop
  libpipewire_dep = dependency('libpipewire-0.3', version: libpipewire_req)
endif

have_introspection = get_option('introspection')
if have_introspection
  gobject_introspection_dep = dependency('gobject-introspection-1.0')

  introspection_args = [
    '--quiet',
    '-U_GNU_SOURCE',
  ]
endif

have_documentation = get_option('docs')
if have_documentation
  gidocgen_dep = dependency('gi-docgen', version: '>= 2021.1',
                            fallback: ['gi-docgen', 'dummy_dep'])
endif

have_tests = get_option('tests')
have_core_tests = false
have_cogl_tests = false
have_clutter_tests = false
have_native_tests = false
have_kvm_tests = false
have_tty_tests = false
have_installed_tests = false

if have_tests
  have_core_tests = get_option('core_tests')
  if have_core_tests
    if not have_wayland
      error('Tests require Wayland to be enabled')
    endif
    if not have_x11_client
      error('Tests requires an X11 client')
    endif
  endif
  have_native_tests = get_option('native_tests')
  if have_native_tests
    if not have_native_backend
      error('Native tests require the native backend')
    endif
    if not have_remote_desktop
      error('Native tests require remote desktop')
    endif
  endif
  have_kvm_tests = get_option('kvm_tests')
  if have_kvm_tests
    if not have_native_backend
      error('KVM tests need the native backend tests')
    endif
    if host_machine.cpu_family() != 'x86_64'
      error('KVM tests are only supported on x86_64')
    endif
  endif
  have_tty_tests = get_option('tty_tests')
  if have_tty_tests
    if not have_native_backend
      error('TTY tests need the native backend tests')
    endif
  endif

  have_cogl_tests = get_option('cogl_tests')
  have_clutter_tests = get_option('clutter_tests')
  have_installed_tests = get_option('installed_tests')

  meta_dbus_runner = find_program('src/tests/meta-dbus-runner.py')
  default_test_wrappers = [
    meta_dbus_runner,
  ]

  add_test_setup('default',
    is_default: true,
    exe_wrapper: default_test_wrappers,
  )

  add_test_setup('plain')

  xvfb = find_program('xvfb-run')
  xvfb_args = [
    '-a',
    '-s',
    '+iglx -noreset',
  ]
  xvfb_command = [xvfb] + xvfb_args

  add_test_setup('CI',
    env: [
      'MUTTER_DEBUG_DUMMY_MODE_SPECS=800x600@10.0',
    ],
    exe_wrapper: [
      default_test_wrappers,
      xvfb_command,
    ],
    timeout_multiplier: 10,
  )
endif

have_profiler = get_option('profiler')
if have_profiler
  # libsysprof-capture support
  sysprof_dep = dependency('sysprof-capture-4',
    required: true,
    default_options: [
      'enable_examples=false',
      'enable_gtk=false',
      'enable_tests=false',
      'enable_tools=false',
      'libsysprof=false',
      'with_sysprofd=none',
      'help=false',
    ],
    fallback: ['sysprof', 'libsysprof_capture_dep'],
  )
endif

required_functions = [
  'ffs',
  'clz',
  'memmem',
]
foreach function : required_functions
  if not cc.has_function(function)
    error('Required function ' + function + ' missing')
  endif
endforeach

if host_machine.cpu_family() == 'x86'
  add_project_arguments('-ffloat-store', language: 'c')
endif
add_project_arguments('-D_GNU_SOURCE', language: 'c')

buildtype = get_option('buildtype')
if buildtype != 'plain'
  all_warnings = [
    '-fno-strict-aliasing',
    '-Wpointer-arith',
    '-Wmissing-declarations',
    '-Wformat=2',
    '-Wstrict-prototypes',
    '-Wmissing-prototypes',
    '-Wnested-externs',
    '-Wold-style-definition',
    '-Wundef',
    '-Wunused',
    '-Wcast-align',
    '-Wmissing-noreturn',
    '-Wmissing-format-attribute',
    '-Wmissing-include-dirs',
    '-Wlogical-op',
    '-Wignored-qualifiers',
    '-Werror=redundant-decls',
    '-Werror=implicit',
    '-Werror=nonnull',
    '-Werror=init-self',
    '-Werror=main',
    '-Werror=missing-braces',
    '-Werror=sequence-point',
    '-Werror=return-type',
    '-Werror=trigraphs',
    '-Werror=array-bounds',
    '-Werror=write-strings',
    '-Werror=address',
    '-Werror=int-to-pointer-cast',
    '-Werror=pointer-to-int-cast',
    '-Werror=empty-body',
    '-Werror=write-strings',
    '-Werror=strict-aliasing',
    '-Wno-sign-compare',
    '-Wno-cast-function-type',
    '-Wno-unused-parameter',
    '-Wno-missing-field-initializers',
    '-Wno-type-limits',
  ]
  supported_warnings = cc.get_supported_arguments(all_warnings)
  add_project_arguments(supported_warnings, language: 'c')
endif

if get_option('debug')
  debug_c_args = [
    '-DG_ENABLE_DEBUG',
    '-fno-omit-frame-pointer'
  ]
  supported_debug_c_args = cc.get_supported_arguments(debug_c_args)
  add_project_arguments(supported_debug_c_args, language: 'c')
endif

cc.compiles('void main (void) { __builtin_ffsl (0); __builtin_popcountl (0); }')

cdata = configuration_data()
cdata.set_quoted('GETTEXT_PACKAGE', gettext_package)
cdata.set_quoted('VERSION', meson.project_version())
cdata.set_quoted('PACKAGE_VERSION', meson.project_version())

cdata.set('HAVE_EGL', have_egl)
cdata.set('HAVE_WAYLAND', have_wayland)
cdata.set('HAVE_XWAYLAND', have_xwayland)
cdata.set('HAVE_X11', have_x11)
cdata.set('HAVE_X11_CLIENT', have_x11_client)
cdata.set('HAVE_LIBSYSTEMD', have_libsystemd)
cdata.set('HAVE_NATIVE_BACKEND', have_native_backend)
cdata.set('HAVE_REMOTE_DESKTOP', have_remote_desktop)
cdata.set('HAVE_GNOME_DESKTOP', have_gnome_desktop)
cdata.set('HAVE_EGL_DEVICE', have_egl_device)
cdata.set('HAVE_WAYLAND_EGLSTREAM', have_wayland_eglstream)
cdata.set('HAVE_LIBGUDEV', have_libgudev)
cdata.set('HAVE_LIBWACOM', have_libwacom)
cdata.set('HAVE_SM', have_sm)
cdata.set('HAVE_STARTUP_NOTIFICATION', have_startup_notification)
cdata.set('HAVE_INTROSPECTION', have_introspection)
cdata.set('HAVE_PROFILER', have_profiler)

if have_x11_client
  xkb_base = xkeyboard_config_dep.get_pkgconfig_variable('xkb_base')
  cdata.set_quoted('XKB_BASE', xkb_base)
endif

if cc.has_header_symbol('sys/prctl.h', 'prctl')
  cdata.set('HAVE_SYS_PRCTL', 1)
endif

have_xwayland_initfd = false
have_xwayland_listenfd = false
have_xwayland_terminate_delay = false
if have_xwayland
  xwayland_dep = dependency('xwayland', required: false)

  xwayland_path = get_option('xwayland_path')
  if xwayland_path == ''
    if xwayland_dep.found()
      xwayland_path = xwayland_dep.get_pkgconfig_variable('xwayland')
    else
      xwayland_path = find_program('Xwayland').path()
    endif
  endif
  cdata.set_quoted('XWAYLAND_PATH', xwayland_path)

  # For Xwayland authority file generation.
  if cc.has_header_symbol('sys/random.h', 'getrandom')
    cdata.set('HAVE_SYS_RANDOM', 1)
  elif cc.has_header_symbol('linux/random.h', 'getrandom')
    cdata.set('HAVE_LINUX_RANDOM', 1)
  else
    error('Required function getrandom not found')
  endif

  # For Xwayland -initfd usage
  use_initfd = get_option('xwayland_initfd')
  if xwayland_dep.found()
    xwayland_supports_initfd = xwayland_dep.get_pkgconfig_variable('have_initfd') == 'true'
  else
    xwayland_options = run_command(xwayland_path, '-help')
    xwayland_supports_initfd = xwayland_options.stderr().contains('-initfd')
  endif

  if use_initfd.auto()
    have_xwayland_initfd = xwayland_supports_initfd
  else
    have_xwayland_initfd = use_initfd.enabled()
    if have_xwayland_initfd and not xwayland_supports_initfd
      error('XWayland -initfd support requested but not available')
    endif
  endif

  if (have_xwayland_initfd)
    cdata.set('HAVE_XWAYLAND_INITFD', 1)
  endif

  # For Xwayland -listenfd usage
  if xwayland_dep.found()
    have_xwayland_listenfd = xwayland_dep.get_pkgconfig_variable('have_listenfd') == 'true'
  endif

  if (have_xwayland_listenfd)
    cdata.set('HAVE_XWAYLAND_LISTENFD', 1)
  endif

  # For Xwayland -listenfd usage
  if xwayland_dep.found()
    have_xwayland_terminate_delay = xwayland_dep.get_pkgconfig_variable('have_terminate_delay') == 'true'
  endif

  if (have_xwayland_terminate_delay)
    cdata.set('HAVE_XWAYLAND_TERMINATE_DELAY', 1)
  endif
endif

have_xsetioerrorexithandler = false
if have_x11_client
  if cc.has_function('XSetIOErrorExitHandler', dependencies: x11_dep,
                    prefix: '''#include <X11/Xlib.h>''')
    have_xsetioerrorexithandler = true
    cdata.set('HAVE_XSETIOERROREXITHANDLER', 1)
  endif
endif

optional_functions = [
  'mkostemp',
  'posix_fallocate',
  'memfd_create',
]

foreach function : optional_functions
  if cc.has_function(function)
    cdata.set('HAVE_' + function.to_upper(), 1)
  else
    message('Optional function ' + function + ' missing')
  endif
endforeach

xwayland_grab_default_access_rules = get_option('xwayland_grab_default_access_rules')
cdata.set_quoted('XWAYLAND_GRAB_DEFAULT_ACCESS_RULES',
                 xwayland_grab_default_access_rules)

cdata.set_quoted('MUTTER_PLUGIN_DIR', join_paths(pkglibdir, 'plugins'))
cdata.set_quoted('MUTTER_LOCALEDIR', localedir)
cdata.set_quoted('MUTTER_LIBEXECDIR', libexecdir)
cdata.set_quoted('MUTTER_PKGDATADIR', pkgdatadir)

config_h = configure_file(
  input: 'config.h.meson',
  output: 'config.h',
  configuration: cdata
)

top_includepath = include_directories('.')

subdir('cogl')
subdir('clutter')
subdir('data')
subdir('src')
subdir('po')
subdir('doc/man')
if have_documentation
  subdir('doc/reference')
endif

meson.add_install_script('meson/meson-postinstall.sh')
meson.add_dist_script('meson/check-version.py', meson.project_version(), 'NEWS')

summary('prefix', prefix, section: 'Directories')
summary('libexecdir', libexecdir, section: 'Directories')
summary('pkgdatadir', pkgdatadir, section: 'Directories')

summary('buildtype', get_option('buildtype'), section: 'Build Configuration')
summary('debug', get_option('debug'), section: 'Build Configuration')

summary('OpenGL', have_gl, section: 'Rendering APIs')
summary('GLES2', have_gles2, section: 'Rendering APIs')
summary('EGL', have_egl, section: 'Rendering APIs')
summary('GLX', have_glx, section: 'Rendering APIs')

summary('Wayland', have_wayland, section: 'Options')
summary('Wayland EGLStream', have_wayland_eglstream, section: 'Options')
summary('X11', have_x11, section: 'Options')
summary('XWayland', have_xwayland, section: 'Options')
summary('Native Backend', have_native_backend, section: 'Options')
summary('EGL Device', have_egl_device, section: 'Options')
summary('Remote desktop', have_remote_desktop, section: 'Options')
summary('libgnome-desktop', have_gnome_desktop, section: 'Options')
summary('gudev', have_libgudev, section: 'Options')
summary('Wacom', have_libwacom, section: 'Options')
summary('SM', have_sm, section: 'Options')
summary('Startup notification', have_startup_notification, section: 'Options')
summary('Introspection', have_introspection, section: 'Options')
summary('Documentation', have_documentation, section: 'Options')
summary('Profiler', have_profiler, section: 'Options')
summary('Xwayland initfd', have_xwayland_initfd, section: 'Options')
summary('Xwayland listenfd', have_xwayland_listenfd, section: 'Options')
summary('Safe X11 I/O errors', have_xsetioerrorexithandler, section: 'Options')
summary('Xwayland terminate delay', have_xwayland_terminate_delay, section: 'Options')

summary('Enabled', have_tests, section: 'Tests')
summary('Core tests', have_core_tests, section: 'Tests')
summary('Cogl tests', have_cogl_tests, section: 'Tests')
summary('Clutter tests', have_clutter_tests, section: 'Tests')
summary('KVM tests', get_option('kvm_tests'), section: 'Tests')
summary('Installed tests', have_installed_tests, section: 'Tests')
summary('Coverage', get_option('b_coverage'), section: 'Tests')