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|
use std::collections::HashMap;
use std::fs::File;
use std::io::Read;
use smithay::output::Output;
use smithay::reexports::wayland_protocols_wlr;
use smithay::reexports::wayland_server::backend::ClientId;
use smithay::reexports::wayland_server::{
Client, DataInit, Dispatch, DisplayHandle, GlobalDispatch, New, Resource,
};
use wayland_protocols_wlr::gamma_control::v1::server::{
zwlr_gamma_control_manager_v1, zwlr_gamma_control_v1,
};
use zwlr_gamma_control_manager_v1::ZwlrGammaControlManagerV1;
use zwlr_gamma_control_v1::ZwlrGammaControlV1;
const VERSION: u32 = 1;
pub struct GammaControlManagerState {
// Active gamma controls only. Failed ones are removed.
gamma_controls: HashMap<Output, ZwlrGammaControlV1>,
}
pub struct GammaControlManagerGlobalData {
filter: Box<dyn for<'c> Fn(&'c Client) -> bool + Send + Sync>,
}
pub trait GammaControlHandler {
fn gamma_control_manager_state(&mut self) -> &mut GammaControlManagerState;
fn get_gamma_size(&mut self, output: &Output) -> Option<u32>;
fn set_gamma(&mut self, output: &Output, ramp: Option<Vec<u16>>) -> Option<()>;
}
pub struct GammaControlState {
gamma_size: u32,
}
impl GammaControlManagerState {
pub fn new<D, F>(display: &DisplayHandle, filter: F) -> Self
where
D: GlobalDispatch<ZwlrGammaControlManagerV1, GammaControlManagerGlobalData>,
D: Dispatch<ZwlrGammaControlManagerV1, ()>,
D: Dispatch<ZwlrGammaControlV1, GammaControlState>,
D: GammaControlHandler,
D: 'static,
F: for<'c> Fn(&'c Client) -> bool + Send + Sync + 'static,
{
let global_data = GammaControlManagerGlobalData {
filter: Box::new(filter),
};
display.create_global::<D, ZwlrGammaControlManagerV1, _>(VERSION, global_data);
Self {
gamma_controls: HashMap::new(),
}
}
pub fn output_removed(&mut self, output: &Output) {
if let Some(gamma_control) = self.gamma_controls.remove(output) {
gamma_control.failed();
}
}
}
impl<D> GlobalDispatch<ZwlrGammaControlManagerV1, GammaControlManagerGlobalData, D>
for GammaControlManagerState
where
D: GlobalDispatch<ZwlrGammaControlManagerV1, GammaControlManagerGlobalData>,
D: Dispatch<ZwlrGammaControlManagerV1, ()>,
D: Dispatch<ZwlrGammaControlV1, GammaControlState>,
D: GammaControlHandler,
D: 'static,
{
fn bind(
_state: &mut D,
_handle: &DisplayHandle,
_client: &Client,
manager: New<ZwlrGammaControlManagerV1>,
_manager_state: &GammaControlManagerGlobalData,
data_init: &mut DataInit<'_, D>,
) {
data_init.init(manager, ());
}
fn can_view(client: Client, global_data: &GammaControlManagerGlobalData) -> bool {
(global_data.filter)(&client)
}
}
impl<D> Dispatch<ZwlrGammaControlManagerV1, (), D> for GammaControlManagerState
where
D: Dispatch<ZwlrGammaControlManagerV1, ()>,
D: Dispatch<ZwlrGammaControlV1, GammaControlState>,
D: GammaControlHandler,
D: 'static,
{
fn request(
state: &mut D,
_client: &Client,
_resource: &ZwlrGammaControlManagerV1,
request: <ZwlrGammaControlManagerV1 as Resource>::Request,
_data: &(),
_dhandle: &DisplayHandle,
data_init: &mut DataInit<'_, D>,
) {
match request {
zwlr_gamma_control_manager_v1::Request::GetGammaControl { id, output } => {
if let Some(output) = Output::from_resource(&output) {
// We borrow state in the middle.
#[allow(clippy::map_entry)]
if !state
.gamma_control_manager_state()
.gamma_controls
.contains_key(&output)
{
if let Some(gamma_size) = state.get_gamma_size(&output) {
let zwlr_gamma_control =
data_init.init(id, GammaControlState { gamma_size });
zwlr_gamma_control.gamma_size(gamma_size);
state
.gamma_control_manager_state()
.gamma_controls
.insert(output, zwlr_gamma_control);
return;
}
}
}
data_init
.init(id, GammaControlState { gamma_size: 0 })
.failed();
}
zwlr_gamma_control_manager_v1::Request::Destroy => (),
_ => unreachable!(),
}
}
}
impl<D> Dispatch<ZwlrGammaControlV1, GammaControlState, D> for GammaControlManagerState
where
D: Dispatch<ZwlrGammaControlV1, GammaControlState>,
D: GammaControlHandler,
D: 'static,
{
fn request(
state: &mut D,
_client: &Client,
resource: &ZwlrGammaControlV1,
request: <ZwlrGammaControlV1 as Resource>::Request,
data: &GammaControlState,
_dhandle: &DisplayHandle,
_data_init: &mut DataInit<'_, D>,
) {
match request {
zwlr_gamma_control_v1::Request::SetGamma { fd } => {
let gamma_controls = &mut state.gamma_control_manager_state().gamma_controls;
let Some((output, _)) = gamma_controls.iter().find(|(_, x)| *x == resource) else {
return;
};
let output = output.clone();
trace!("setting gamma for output {}", output.name());
// Start with a u16 slice so it's aligned correctly.
let mut gamma = vec![0u16; data.gamma_size as usize * 3];
let buf = bytemuck::cast_slice_mut(&mut gamma);
let mut file = File::from(fd);
{
let _span = tracy_client::span!("read gamma from fd");
if let Err(err) = file.read_exact(buf) {
warn!("failed to read gamma data: {err:?}");
resource.failed();
gamma_controls.remove(&output);
let _ = state.set_gamma(&output, None);
return;
}
// Verify that there's no more data.
{
match file.read(&mut [0]) {
Ok(0) => (),
Ok(_) => {
warn!("gamma data is too large");
resource.failed();
gamma_controls.remove(&output);
let _ = state.set_gamma(&output, None);
return;
}
Err(err) => {
warn!("error reading gamma data: {err:?}");
resource.failed();
gamma_controls.remove(&output);
let _ = state.set_gamma(&output, None);
return;
}
}
}
}
if state.set_gamma(&output, Some(gamma)).is_none() {
resource.failed();
let gamma_controls = &mut state.gamma_control_manager_state().gamma_controls;
gamma_controls.remove(&output);
let _ = state.set_gamma(&output, None);
}
}
zwlr_gamma_control_v1::Request::Destroy => (),
_ => unreachable!(),
}
}
fn destroyed(
state: &mut D,
_client: ClientId,
resource: &ZwlrGammaControlV1,
_data: &GammaControlState,
) {
let gamma_controls = &mut state.gamma_control_manager_state().gamma_controls;
let Some((output, _)) = gamma_controls.iter().find(|(_, x)| *x == resource) else {
return;
};
let output = output.clone();
gamma_controls.remove(&output);
let _ = state.set_gamma(&ou
|
