head-management: add brightness-info-v1 extension

src/compositor.rs

@@ -662,6 +662,7 @@ fn create_dummy_output(state: &Rc<State>) {
         color_space: backend_state.color_space,
         transfer_function: backend_state.transfer_function,
         supported_formats: Default::default(),
+        brightness: None,
     };
     let connector_data = Rc::new(ConnectorData {
         id,

src/ifs/head_management.rs

@@ -67,7 +67,7 @@ struct HeadCommon {
     pending: RefCell<Vec<HeadOp>>,
 }
 
-#[derive(Clone, Eq, PartialEq)]
+#[derive(Clone, PartialEq)]
 pub struct HeadState {
     pub name: RcEq<String>,
     pub wl_output: Option<GlobalName>,
@@ -92,6 +92,7 @@ pub struct HeadState {
     pub color_space: BackendColorSpace,
     pub transfer_function: BackendTransferFunction,
     pub supported_formats: RcEq<Vec<&'static Format>>,
+    pub brightness: Option<f64>,
 }
 
 impl HeadState {
@@ -286,6 +287,11 @@ impl HeadManagers {
                 ext.send_supported(state);
                 head.session.schedule_done();
             }
+            if let Some(ext) = &head.ext.brightness_info_v1 {
+                ext.send_implied_default_brightness(state);
+                ext.send_brightness(state);
+                head.session.schedule_done();
+            }
         }
     }
 
@@ -491,6 +497,10 @@ impl HeadManagers {
                 ext.send_state(state);
                 head.session.schedule_done();
             }
+            if let Some(ext) = &head.ext.brightness_info_v1 {
+                ext.send_implied_default_brightness(state);
+                head.session.schedule_done();
+            }
         }
     }
 
@@ -505,4 +515,16 @@ impl HeadManagers {
             }
         }
     }
+
+    pub fn handle_brightness_change(&self, brightness: Option<f64>) {
+        let state = &mut *self.state.borrow_mut();
+        state.brightness = brightness;
+        for head in self.managers.lock().values() {
+            skip_in_transaction!(head);
+            if let Some(ext) = &head.ext.brightness_info_v1 {
+                ext.send_brightness(state);
+                head.session.schedule_done();
+            }
+        }
+    }
 }

src/ifs/head_management/head_management_macros.rs

@@ -410,4 +410,5 @@ declare_extensions! {
     jay_tearing_mode_setter_v1: JayTearingModeSetterV1,
     format_setter_v1: FormatSetterV1,
     drm_color_space_setter_v1: DrmColorSpaceSetterV1,
+    brightness_info_v1: BrightnessInfoV1,
 }

src/ifs/head_management/jay_head_ext.rs

@@ -1,3 +1,4 @@
+pub(super) mod jay_head_ext_brightness_info_v1;
 pub(super) mod jay_head_ext_compositor_space_enabler_v1;
 pub(super) mod jay_head_ext_compositor_space_info_v1;
 pub(super) mod jay_head_ext_compositor_space_positioner_v1;

src/ifs/head_management/jay_head_ext/jay_head_ext_brightness_info_v1.rs

@@ -0,0 +1,77 @@
+use {
+    crate::{
+        backend::BackendTransferFunction,
+        cmm::cmm_luminance::Luminance,
+        ifs::head_management::HeadState,
+        wire::{
+            jay_head_ext_brightness_info_v1::{
+                Brightness, DefaultBrightness, ImpliedDefaultBrightness,
+                JayHeadExtBrightnessInfoV1RequestHandler,
+            },
+            jay_head_manager_ext_brightness_info_v1::JayHeadManagerExtBrightnessInfoV1RequestHandler,
+        },
+    },
+    std::rc::Rc,
+};
+
+impl_brightness_info_v1! {
+    version = 1,
+    after_announce = after_announce,
+    after_transaction = after_transaction,
+}
+
+impl HeadName {
+    fn after_announce(&self, shared: &HeadState) {
+        self.send_implied_default_brightness(shared);
+        self.send_brightness(shared);
+    }
+
+    fn after_transaction(&self, shared: &HeadState, tran: &HeadState) {
+        if shared.transfer_function != tran.transfer_function {
+            self.send_implied_default_brightness(shared);
+        }
+        if shared.brightness != tran.brightness {
+            self.send_brightness(shared);
+        }
+    }
+
+    pub(in super::super) fn send_implied_default_brightness(&self, shared: &HeadState) {
+        let lux = match shared.transfer_function {
+            BackendTransferFunction::Default => shared
+                .monitor_info
+                .as_ref()
+                .and_then(|m| m.luminance.as_ref())
+                .map(|l| l.max)
+                .unwrap_or(Luminance::SRGB.white.0),
+            BackendTransferFunction::Pq => Luminance::ST2084_PQ.white.0,
+        };
+        self.client.event(ImpliedDefaultBrightness {
+            self_id: self.id,
+            lux: (lux as f32).to_bits(),
+        })
+    }
+
+    pub(in super::super) fn send_brightness(&self, shared: &HeadState) {
+        match shared.brightness {
+            None => self.client.event(DefaultBrightness { self_id: self.id }),
+            Some(b) => self.client.event(Brightness {
+                self_id: self.id,
+                lux: (b as f32).to_bits(),
+            }),
+        }
+    }
+}
+
+impl JayHeadManagerExtBrightnessInfoV1RequestHandler for MgrName {
+    type Error = ErrorName;
+
+    mgr_common_req!();
+}
+
+impl JayHeadExtBrightnessInfoV1RequestHandler for HeadName {
+    type Error = ErrorName;
+
+    head_common_req!();
+}
+
+error!();

src/ifs/head_management/jay_head_manager_session_v1.rs

@@ -392,6 +392,7 @@ impl JayHeadManagerSessionV1RequestHandler for JayHeadManagerSessionV1 {
             TEARING_MODE_INFO               = 1 << 9,
             FORMAT_INFO                     = 1 << 10,
             DRM_COLOR_SPACE_INFO            = 1 << 11,
+            BRIGHTNESS_INFO                 = 1 << 12,
             COMPOSITOR_SPACE_INFO_ENABLED   = 1 << 13,
         }
         for head in self.heads.lock().values() {
@@ -452,6 +453,7 @@ impl JayHeadManagerSessionV1RequestHandler for JayHeadManagerSessionV1 {
                     HeadOp::SetTransferFunction(e) => {
                         state.transfer_function = e;
                         to_send |= DRM_COLOR_SPACE_INFO;
+                        to_send |= BRIGHTNESS_INFO;
                     }
                     HeadOp::SetColorSpace(c) => {
                         state.color_space = c;

src/tasks/connector.rs

@@ -68,6 +68,7 @@ pub fn handle(state: &Rc<State>, connector: &Rc<dyn Connector>) {
         color_space: backend_state.color_space,
         transfer_function: backend_state.transfer_function,
         supported_formats: Default::default(),
+        brightness: None,
     };
     let data = Rc::new(ConnectorData {
         id,

src/tree/output.rs

@@ -913,8 +913,14 @@ impl OutputNode {
     }
 
     pub fn set_brightness(&self, brightness: Option<f64>) {
-        self.global.persistent.brightness.set(brightness);
+        let old = self.global.persistent.brightness.replace(brightness);
-        self.update_color_description();
+        if old != brightness {
+            self.update_color_description();
+            self.global
+                .connector
+                .head_managers
+                .handle_brightness_change(brightness);
+        }
     }
 
     fn find_stacked_at(

wire/jay_head_ext_brightness_info_v1.txt

@@ -0,0 +1,15 @@
+request destroy (destructor) {
+
+}
+
+event implied_default_brightness {
+    lux: u32,
+}
+
+event default_brightness {
+
+}
+
+event brightness {
+    lux: u32,
+}

wire/jay_head_manager_ext_brightness_info_v1.txt

@@ -0,0 +1,7 @@
+request destroy (destructor) {
+
+}
+
+event head {
+    head: id(jay_head_ext_brightness_info_v1) (new),
+}