screen: Allow `outputs` to be changed.

This moves the handling of the `outputs` property away from C and into
Lua. It will allow the use of `screen.fake_add` to have outputs.
This commit is contained in:
Emmanuel Lepage Vallee 2019-06-19 18:02:49 -04:00
parent ae99e8d7bb
commit b0f18bce52
4 changed files with 599 additions and 114 deletions

View File

@ -13,6 +13,7 @@ local capi =
screen = screen,
client = client,
awesome = awesome,
root = root,
}
local gdebug = require("gears.debug")
local gmath = require("gears.math")
@ -260,6 +261,58 @@ function screen.object.set_padding(self, padding)
end
end
--- A list of outputs for this screen with their size in mm.
--
-- Please note that the table content may vary. In some case, it might also be
-- empty.
--
-- An easy way to check if a screen is the laptop screen is usually:
--
-- if s.outputs["LVDS-1"] then
-- -- do something
-- end
--
-- **Signal:**
--
-- * *property::outputs*
--
-- **Immutable:** true
-- @property outputs
-- @param table
-- @tfield table table.name A table with the screen name as key (like `eDP1` on a laptop)
-- @tfield integer table.mm_width The screen physical width.
-- @tfield integer table.mm_height The screen physical height.
-- @tfield integer table.name The output name.
-- @tfield integer table.viewport_id The identifier of the viewport this output
-- corresponds to.
function screen.object.get_outputs(s)
local ret = {}
local outputs = s._custom_outputs
or (s.data.viewport and s.data.viewport.outputs or s._outputs)
-- The reason this exists is because output with name as keys is very
-- convenient for quick name lookup by the users, but inconvenient in
-- the lower layers since knowing the output count (using #) is better.
for k, v in ipairs(outputs) do
ret[v.name or k] = v
end
return ret
end
function screen.object.set_outputs(self, outputs)
self._custom_outputs = outputs
self:emit_signal("property::outputs", screen.object.get_outputs(self))
end
capi.screen.connect_signal("property::_outputs", function(s)
if not s._custom_outputs then
s:emit_signal("property::outputs", screen.object.get_outputs(s))
end
end)
--- Get the preferred screen in the context of a client.
--
-- This is exactly the same as `awful.screen.focused` except that it avoids
@ -486,7 +539,7 @@ end
function screen.object.get_tags(s, unordered)
local tags = {}
for _, t in ipairs(root.tags()) do
for _, t in ipairs(capi.root.tags()) do
if get_screen(t.screen) == s then
table.insert(tags, t)
end
@ -560,75 +613,32 @@ function screen.set_auto_dpi_enabled(enabled)
data.autodpi = enabled
end
--- The number of pixels per inch of the screen.
--
-- The default DPI comes from the X11 server. In most case, it will be 96. If
-- `autodpi` is set to `true` on the screen, it will use the least dense dpi
-- from the screen outputs. Most of the time, screens only have a single output,
-- however it will have two (or more) when "clone mode" is used (eg, when a
-- screen is duplicated on a projector).
--
-- @property dpi
-- @param number the DPI value.
local xft_dpi, fallback_dpi
--- The lowest density DPI from all of the (physical) outputs.
-- @property minimum_dpi
-- @param number the DPI value.
local function get_fallback()
local mm_per_inch = 25.4
--- The highest density DPI from all of the (physical) outputs.
-- @property maximum_dpi
-- @param number the DPI value.
-- Following Keith Packard's whitepaper on Xft,
-- https://keithp.com/~keithp/talks/xtc2001/paper/xft.html#sec-editing
-- the proper fallback for Xft.dpi is the vertical DPI reported by
-- the X server. This will generally be 96 on Xorg, unless the user
-- has configured it differently
if root and not fallback_dpi then
local _, h = root.size()
local _, hmm = root.size_mm()
fallback_dpi = hmm ~= 0 and h * mm_per_inch / hmm
end
return fallback_dpi or 96
end
function screen.object.get_dpi(s)
local mm_per_inch = 25.4
if s.data.dpi or s.data.dpi_cache then
return s.data.dpi or s.data.dpi_cache
end
-- Xft.dpi is explicit user configuration, so honor it
if not xft_dpi and awesome and awesome.xrdb_get_value then
xft_dpi = tonumber(awesome.xrdb_get_value("", "Xft.dpi")) or false
end
if xft_dpi then
s.data.dpi_cache = xft_dpi
return s.data.dpi_cache
end
if not data.autodpi then
s.data.dpi_cache = get_fallback()
return s.data.dpi_cache
end
-- Try to compute DPI based on outputs (use the minimum)
local dpi = nil
local geo = s.geometry
for _, o in pairs(s.outputs) do
-- Ignore outputs with width/height 0
if o.mm_width ~= 0 and o.mm_height ~= 0 then
local dpix = geo.width * mm_per_inch / o.mm_width
local dpiy = geo.height * mm_per_inch / o.mm_height
dpi = math.min(dpix, dpiy, dpi or dpix)
end
end
if dpi then
s.data.dpi_cache = dpi
return dpi
end
s.data.dpi_cache = get_fallback()
return s.data.dpi_cache
end
function screen.object.set_dpi(s, dpi)
s.data.dpi = dpi
end
--- The preferred DPI from all of the (physical) outputs.
--
-- This is computed by normalizing all output to fill the area, then picking
-- the lowest of the resulting virtual DPIs.
--
-- @property preferred_dpi
-- @param number the DPI value.
--- Emitted when a new screen is added.
--
@ -652,6 +662,177 @@ end
-- @signal request::wallpaper
-- @tparam screen s The screen object.
--- When a new (physical) screen area has been added.
--
-- Important: This only exists when Awesome is started with `--screen off`.
-- Please also note that this doesn't mean it will appear when a screen is
-- physically plugged. Depending on the configuration a tool like `arandr` or
-- the `xrandr` command is needed.
--
-- The default handler will create a screen that fills the area.
--
-- To disconnect the default handler, use:
--
-- screen.disconnect_signal(
-- "request::create", awful.screen.create_screen_handler
-- )
--
-- @signal request::create
-- @tparam table viewport
-- @tparam table viewport.geometry A table with `x`, `y`, `width` and `height`
-- keys.
-- @tparam table viewport.outputs A table with the monitor name and possibly the
-- `mm_width` and `mm_height` values if they are available.
-- @tparam number viewport.id An identifier for this viewport (by pixel
-- resolution). It
-- will not change when outputs are modified, but will change when the
-- resolution changes. Note that if it fully disappear, the next time an
-- viewport with the same resolution appears, it will have a different `id`.
-- @tparam number viewport.minimum_dpi The least dense DPI.
-- @tparam number viewport.maximum_dpi The most dense DPI.
-- @tparam number viewport.preferred_dpi The relative least dense DPI.
-- @tparam table args
-- @tparam string args.context Why was this signal sent.
-- @see outputs
-- @see awful.screen.create_screen_handler
--- When a physical monitor viewport has been removed.
--
-- Important: This only exists when Awesome is started with `--screen off`.
--
-- If you replace the default handler, it is up to you to find the screen(s)
-- associated with this viewport.
--
-- To disconnect the default handler, use:
--
-- screen.disconnect_signal(
-- "request::remove", awful.screen.remove_screen_handler
-- )
--
-- @signal request::remove
-- @tparam table viewport
-- @tparam table viewport.geometry A table with `x`, `y`, `width` and `height`
-- keys.
-- @tparam table viewport.outputs A table with the monitor name and possibly the
-- `mm_width` and `mm_height` values if they are available.
-- @tparam number viewport.id An identifier for this viewport (by pixel
-- resolution). It will not change when outputs are modified, but will change
-- when the resolution changes. Note that if it fully disappear, the next time
-- an viewport with the same resolution appears, it will have a different `id`.
-- @tparam number viewport.minimum_dpi The least dense DPI.
-- @tparam number viewport.maximum_dpi The most dense DPI.
-- @tparam number viewport.preferred_dpi The relative least dense DPI.
-- @tparam table args
-- @tparam string args.context Why was this signal sent.
-- @see awful.screen.remove_screen_handler
--- When a physical viewport resolution has changed or it has been replaced.
--
-- Important: This only exists when Awesome is started with `--screen off`.
--
-- Note that given the viewports are not the same, the `id` wont be the same.
-- Also note that if multiple new viewports fit within a single "old" viewport,
-- the resized screen will be the one with the largest total overlapping
-- viewport (`intersection.width*intersection.height`), regardless of the
-- outputs names.
--
-- To disconnect the default handler, use:
--
-- screen.disconnect_signal(
-- "request::resize", awful.screen.resize_screen_handler
-- )
--
-- @signal request::resize
-- @tparam table old_viewport
-- @tparam table old_viewport.geometry A table with `x`, `y`, `width` and
-- `height` keys.
-- @tparam table old_viewport.outputs A table with the monitor name and
-- possibly the `mm_width` and `mm_height` values if they are available.
-- @tparam number old_viewport.id An identifier for this viewport (by pixel
-- resolution). It will not change when outputs are modified, but will change
-- when the resolution changes. Note that if it fully disappear, the next
-- time an viewport with the same resolution appears, it will have a different
-- `id`.
-- @tparam number old_viewport.minimum_dpi The least dense DPI.
-- @tparam number old_viewport.maximum_dpi The most dense DPI.
-- @tparam number old_viewport.preferred_dpi The relative least dense DPI.
-- @tparam table new_viewport
-- @tparam table new_viewport.geometry A table with `x`, `y`, `width` and
-- `height` keys.
-- @tparam table new_viewport.outputs A table with the monitor name and
-- possibly the
-- `mm_width` and `mm_height` values if they are available.
-- @tparam number new_viewport.id An identifier for this viewport (by pixel
-- resolution). It will not change when outputs are modified, but will change
-- when the resolution changes. Note that if it fully disappear, the next time
-- an viewport with the same resolution appears, it will have a different `id`.
-- @tparam number new_viewport.minimum_dpi The least dense DPI.
-- @tparam number new_viewport.maximum_dpi The most dense DPI.
-- @tparam number new_viewport.preferred_dpi The relative least dense DPI.
-- @tparam table args
-- @tparam string args.context Why was this signal sent.
-- @see awful.screen.resize_screen_handler
--- Default handler for `request::create`.
--
-- Important: This only exists when Awesome is started with `--screen off`.
--
-- A simplified implementation looks like:
--
-- function(viewport --[[, args]])
-- local geo = viewport.geometry
-- local s = screen.fake_add(geo.x, geo.y, geo.width, geo.height)
-- end
--
-- If you implement this by hand, you must also implement handler for the
-- `request::remove` and `request::resize`.
--
-- @signalhandler awful.screen.create_screen_handler
-- @see request::create
--- Default handler for `request::remove`.
--
-- Important: This only exists when Awesome is started with `--screen off`.
--
-- A simplified version of the logic is:
--
-- function (viewport --[[, args]])
-- local geo = viewport.geometry
-- for s in screen do
-- if gears.geometry.rectangle.are_equal(geo, s.geometry) then
-- s:fake_remove()
-- return
-- end
-- end
-- end
--
-- @signalhandler awful.screen.remove_screen_handler
-- @see request::remove
--- Default handler for `request::resize`.
--
-- Important: This only exists when Awesome is started with `--screen off`.
--
-- A simplified version of the logic is:
--
-- function (old_viewport, new_viewport --[[, args]])
-- local old_geo, new_geo = old_viewport.geometry, new_viewport.geometry
-- for s in screen do
-- local sgeo = new_viewport.geometry
-- if gears.geometry.rectangle.are_equal(old_geo, s.geometry) then
-- s:fake_resize(
-- sgeo.x, sgeo.y, sgeo.width, sgeo.height
-- )
-- end
-- end
-- end
--
-- @signalhandler awful.screen.resize_screen_handler
-- @see request::resize
-- Add the DPI properties.
require("awful.screen.dpi")(screen, data)
-- Set the wallpaper(s) and create the bar(s) for new screens
capi.screen.connect_signal("added", function(s)
s:emit_signal("request::desktop_decoration")
@ -679,30 +860,6 @@ capi.screen.connect_signal("request::wallpaper::connected", function(new_handler
end
end)
-- Create some screens when none exist. This can happen when AwesomeWM is
-- started with `--screen off` and no handler is used.
capi.screen.connect_signal("scanned", function()
if capi.screen.count() == 0 then
-- Private API to scan for screens now.
if #capi.screen._viewports() == 0 then
capi.screen._scan_quiet()
end
local viewports = capi.screen._viewports()
if #viewports > 0 then
for _, area in ipairs(viewports) do
local geo = area.geometry
capi.screen.fake_add(geo.x, geo.y, geo.width, geo.height)
end
else
capi.screen.fake_add(0, 0, 640, 480)
end
assert(capi.screen.count() > 0, "Creating screens failed")
end
end)
--- When the tag history changed.
-- @signal tag::history::update

View File

@ -0,0 +1,333 @@
---------------------------------------------------------------------------
-- DPI detection code. --
---------------------------------------------------------------------------
local capi = {screen = screen}
local gtable = require("gears.table")
local grect = require("gears.geometry").rectangle
local gdebug = require("gears.debug")
local module = {}
local ascreen, data = nil, nil
-- Metric to Imperial conversion constant.
local mm_per_inch = 25.4
local xft_dpi, fallback_dpi
local function get_fallback_dpi()
-- Following Keith Packard's whitepaper on Xft,
-- https://keithp.com/~keithp/talks/xtc2001/paper/xft.html#sec-editing
-- the proper fallback for Xft.dpi is the vertical DPI reported by
-- the X server. This will generally be 96 on Xorg, unless the user
-- has configured it differently
if not fallback_dpi then
local _, h = root.size()
local _, hmm = root.size_mm()
fallback_dpi = hmm ~= 0 and h * mm_per_inch / hmm
end
return fallback_dpi or 96
end
local function dpi_for_output(viewport, output)
local dpi = nil
local geo = viewport.geometry
-- Ignore outputs with width/height 0
if output.mm_width ~= 0 and output.mm_height ~= 0 then
local dpix = geo.width * mm_per_inch / output.mm_width
local dpiy = geo.height * mm_per_inch / output.mm_height
dpi = math.min(dpix, dpiy, dpi or dpix)
elseif ascreen._get_xft_dpi() then
dpi = ascreen._get_xft_dpi()
end
return dpi or get_fallback_dpi()
end
local function dpis_for_outputs(viewport)
local max, min = 0, math.huge
for _, o in pairs(viewport.outputs) do
local dpi = dpi_for_output(viewport, o)
o.dpi = dpi
max = math.max(max, dpi)
min = math.min(min, dpi)
end
-- When there is no output.
if min == math.huge then
min = get_fallback_dpi()
max = min
end
--TODO Some output may have a lower resolution than the viewport, so their
-- DPI is currently wrong. Once fixed, the preferred DPI can become
-- different from the minimum one.
local pref = min
viewport.minimum_dpi, viewport.maximum_dpi, viewport.preferred_dpi = min, max, pref
return max, min, pref
end
local function update_outputs(old_viewport, new_viewport)
gtable.diff_merge(
old_viewport.outputs,
new_viewport.outputs,
function(o)
return o.name or (
(o.mm_height or -7)*9999 * (o.mm_width or 5)*123
)
end,
gtable.crush
)
end
-- Fetch the current viewports and compare them to the caches ones.
--
-- The idea is to keep whatever metadata kept within the existing ones and know
-- what is added and removed.
local function update_viewports(force)
if #ascreen._viewports > 0 and not force then return ascreen._viewports end
local new = ascreen._get_viewports()
local _, add, rem = gtable.diff_merge(
ascreen._viewports,
new,
function(a) return a.id end,
update_outputs
)
for _, viewport in ipairs(ascreen._viewports) do
dpis_for_outputs(viewport)
end
assert(#ascreen._viewports > 0 or #new == 0)
return ascreen._viewports, add, rem
end
-- Compute more useful viewport metadata frrom_sparse(add)om the list of output.
-- @treturn table An viewport with more information.
local function update_screen_viewport(s)
local viewport = s.data.viewport
if #ascreen._viewports == 0 then
ascreen._viewports = update_viewports(false)
end
-- The maximum is equal to the screen viewport, so no need for many loops.
if not viewport then
local big_a, i_size = nil, 0
for _, a in ipairs(ascreen._viewports) do
local int = grect.get_intersection(a.geometry, s.geometry)
if int.width*int.height > i_size then
big_a, i_size = a, int.width*int.height
end
if i_size == s.geometry.width*s.geometry.height then break end
end
if big_a then
viewport, s.data.viewport = big_a, big_a
end
end
if not viewport then
gdebug.print_warning("Screen "..tostring(s)..
" doesn't overlap a known physical monitor")
end
end
function module.create_screen_handler(viewport)
local geo = viewport.geometry
local s = capi.screen.fake_add(
geo.x,
geo.y,
geo.width,
geo.height
)
update_screen_viewport(s)
end
function module.remove_screen_handler(viewport)
for s in capi.screen do
if s.data.viewport and s.data.viewport.id == viewport.id then
s:fake_remove()
return
end
end
end
function module.resize_screen_handler(old_viewport, new_viewport)
for s in capi.screen do
if s.data.viewport and s.data.viewport.id == old_viewport.id then
local ngeo = new_viewport.geometry
s:fake_resize(
ngeo.x, ngeo.y, ngeo.width, ngeo.height
)
s.data.viewport = new_viewport
return
end
end
end
-- Xft.dpi is explicit user configuration, so honor it.
-- (It isn't a local function to allow the tests to replace it)
function module._get_xft_dpi()
if not xft_dpi then
xft_dpi = tonumber(awesome.xrdb_get_value("", "Xft.dpi")) or false
end
return xft_dpi
end
-- Provide a way for the tests to replace `capi.screen._viewports`.
function module._get_viewports()
assert(type(capi.screen._viewports()) == "table")
return capi.screen._viewports()
end
local function get_dpi(s)
if s.data.dpi or s.data.dpi_cache then
return s.data.dpi or s.data.dpi_cache
end
if not s.data.viewport then
update_screen_viewport(s)
end
-- Pick a DPI (from best to worst).
local dpi = ascreen._get_xft_dpi()
or (s.data.viewport and s.data.viewport.preferred_dpi or nil)
or get_fallback_dpi()
-- Pick the screen DPI depending on the `autodpi` settings.
-- Historically, AwesomeWM size unit was the pixel. This assumption is
-- present in a lot, if not most, user config and is why this cannot be
-- enable by default for existing users.
s.data.dpi_cache = data.autodpi and dpi
or ascreen._get_xft_dpi()
or get_fallback_dpi()
return s.data.dpi_cache
end
local function set_dpi(s, dpi)
s.data.dpi = dpi
end
screen.connect_signal("request::create", module.create_screen_handler)
screen.connect_signal("request::remove", module.remove_screen_handler)
screen.connect_signal("request::resize", module.resize_screen_handler)
-- Create some screens when none exist. This can happen when AwesomeWM is
-- started with `--screen manual` and no handler is used.
capi.screen.connect_signal("scanned", function()
if capi.screen.count() == 0 then
-- Private API to scan for screens now.
if #ascreen._get_viewports() == 0 then
capi.screen._scan_quiet()
end
local cur_viewports = ascreen._get_viewports()
if #cur_viewports > 0 then
for _, viewport in ipairs(cur_viewports) do
module.create_screen_handler(viewport)
end
else
capi.screen.fake_add(0, 0, 640, 480)
end
assert(capi.screen.count() > 0, "Creating screens failed")
end
end)
-- This is the (undocumented) signal sent by capi.
capi.screen.connect_signal("property::_viewports", function(a)
if capi.screen.automatic_factory then return end
assert(#a > 0)
local _, added, removed = update_viewports(true)
local resized = {}
-- Try to detect viewports being replaced or resized.
for k2, viewport in ipairs(removed) do
local candidate, best_size, best_idx = {}, 0, nil
for k, viewport2 in ipairs(added) do
local int = grect.get_intersection(viewport.geometry, viewport2.geometry)
if (int.width*int.height) > best_size then
best_size, best_idx, candidate = (int.width*int.height), k, viewport2
end
end
if candidate and best_size > 0 then
table.insert(resized, {removed[k2], added[best_idx]})
removed[k2] = nil
table.remove(added , best_idx)
end
end
gtable.from_sparse(removed)
-- Drop the cache.
for s in capi.screen do
s.data.dpi_cache = nil
end
capi.screen.emit_signal("property::viewports", ascreen._get_viewports())
-- First, ask for screens for these new viewport.
for _, viewport in ipairs(added) do
capi.screen.emit_signal("request::create", viewport, {context="viewports_changed"})
end
-- Before removing anything, make sure to resize existing screen as it may
-- affect where clients will go when the screens are removed.
for _, p in ipairs(resized) do
capi.screen.emit_signal("request::resize", p[1], p[2], {context="viewports_changed"})
end
-- Remove the now out-of-view screens.
for _, viewport in ipairs(removed) do
capi.screen.emit_signal("request::remove", viewport, {context="viewports_changed"})
end
end)
-- Add the DPI related properties
return function(screen, d)
ascreen, data = screen, d
-- "Lua" copy of the CAPI viewports. It has more metadata.
ascreen._viewports = {}
gtable.crush(ascreen, module, true)
ascreen.object.set_dpi = set_dpi
ascreen.object.get_dpi = get_dpi
for _, prop in ipairs {"minimum", "maximum", "preferred" } do
screen.object["get_"..prop.."_dpi"] = function(s)
if not s.data.viewport then
update_screen_viewport(s)
end
local a = s.data.viewport or {}
return a[prop.."_dpi"] or nil
end
end
end

View File

@ -6,7 +6,7 @@
local naughty = require("naughty.core")
local gdebug = require("gears.debug")
local capi = {awesome = awesome}
local capi = {awesome = awesome, screen = screen}
if dbus then
naughty.dbus = require("naughty.dbus")
end
@ -31,7 +31,7 @@ naughty.notification = require("naughty.notification")
-- screen.connect_signal("scanned", function() foobar() end)
--
local function screen_fallback()
if screen.count() == 0 then
if capi.screen.count() == 0 then
gdebug.print_warning("An error occurred before a scrren was added")
-- Private API to scan for screens now.
@ -44,10 +44,11 @@ local function screen_fallback()
if #viewports > 0 then
for _, viewport in ipairs(viewports) do
local geo = viewport.geometry
screen.fake_add(geo.x, geo.y, geo.width, geo.height)
local s = capi.screen.fake_add(geo.x, geo.y, geo.width, geo.height)
s.outputs = viewport.outputs
end
else
screen.fake_add(0, 0, 640, 480)
capi.screen.fake_add(0, 0, 640, 480)
end
end
end

View File

@ -130,8 +130,16 @@
* Each viewport in the list corresponds to a **physical** screen rectangle, which
* is **not** the `viewports` property of the `screen` objects.
*
* Each entry in the `viewports` entry has the following keys:
*
* * `geometry` *(table)*: A table with an `x`, `y`, `width` and `height` keys.
* * `outputs` *(table)*: All outputs sharing this viewport.
* * `maximum_dpi` *(number)*: The DPI of the most dense output.
* * `minimum_dpi` *(number)*: The DPI of the least dense output.
* * `preferred_dpi` *(number)*: The optimal DPI.
*
* @signal property::viewports
* @tparam table viewports
* @tparam table viewports A table containing all physical viewports.
* @see automatic_factory
*/
@ -202,24 +210,6 @@
* @see screen
*/
/**
* If RANDR information is available, a list of outputs
* for this screen and their size in mm.
*
* Please note that the table content may vary.
*
* **Signal:**
*
* * *property::outputs*
*
* **Immutable:** true
* @property outputs
* @param table
* @tfield table table.name A table with the screen name as key (like `eDP1` on a laptop)
* @tfield integer table.name.mm_width The screen physical width
* @tfield integer table.name.mm_height The screen physical height
*/
/**
* The screen workarea.
*
@ -413,6 +403,10 @@ luaA_viewport_get_outputs(lua_State *L, viewport_t *a)
lua_pushstring(L, output->name);
lua_settable(L, -3);
lua_pushstring(L, "viewport_id");
lua_pushinteger(L, a->id);
lua_settable(L, -3);
/* Add to the outputs */
lua_rawseti(L, -2, count++);
}
@ -482,7 +476,7 @@ viewports_notify(lua_State *L)
luaA_viewports(L);
luaA_class_emit_signal(L, &screen_class, "property::viewports", 1);
luaA_class_emit_signal(L, &screen_class, "property::_viewports", 1);
}
static viewport_t *
@ -1084,7 +1078,7 @@ screen_modified(screen_t *existing_screen, screen_t *other_screen)
if(outputs_changed) {
luaA_object_push(L, existing_screen);
luaA_object_emit_signal(L, -1, "property::outputs", 0);
luaA_object_emit_signal(L, -1, "property::_outputs", 0);
lua_pop(L, 1);
}
}
@ -1795,7 +1789,7 @@ screen_class_setup(lua_State *L)
NULL,
(lua_class_propfunc_t) luaA_screen_get_index,
NULL);
luaA_class_add_property(&screen_class, "outputs",
luaA_class_add_property(&screen_class, "_outputs",
NULL,
(lua_class_propfunc_t) luaA_screen_get_outputs,
NULL);