metal: allow configuring color space and transfer function

jay-config/src/_private/client.rs

@@ -25,7 +25,8 @@ use {
         theme::{Color, colors::Colorable, sized::Resizable},
         timer::Timer,
         video::{
-            Connector, DrmDevice, Format, GfxApi, Mode, TearingMode, Transform, VrrMode,
+            ColorSpace, Connector, DrmDevice, Format, GfxApi, Mode, TearingMode, TransferFunction,
+            Transform, VrrMode,
             connector_type::{CON_UNKNOWN, ConnectorType},
         },
         xwayland::XScalingMode,
@@ -781,6 +782,19 @@ impl Client {
         self.send(&ClientMessage::ConnectorSetFormat { connector, format });
     }
 
+    pub fn connector_set_colors(
+        &self,
+        connector: Connector,
+        color_space: ColorSpace,
+        transfer_function: TransferFunction,
+    ) {
+        self.send(&ClientMessage::ConnectorSetColors {
+            connector,
+            color_space,
+            transfer_function,
+        });
+    }
+
     pub fn connector_get_scale(&self, connector: Connector) -> f64 {
         let res = self.send_with_response(&ClientMessage::ConnectorGetScale { connector });
         get_response!(res, 1.0, ConnectorGetScale { scale });

jay-config/src/_private/ipc.rs

@@ -11,8 +11,8 @@ use {
         theme::{Color, colors::Colorable, sized::Resizable},
         timer::Timer,
         video::{
-            Connector, DrmDevice, Format, GfxApi, TearingMode, Transform, VrrMode,
-            connector_type::ConnectorType,
+            ColorSpace, Connector, DrmDevice, Format, GfxApi, TearingMode, TransferFunction,
+            Transform, VrrMode, connector_type::ConnectorType,
         },
         xwayland::XScalingMode,
     },
@@ -533,6 +533,11 @@ pub enum ClientMessage<'a> {
     SetColorManagementEnabled {
         enabled: bool,
     },
+    ConnectorSetColors {
+        connector: Connector,
+        color_space: ColorSpace,
+        transfer_function: TransferFunction,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/video.rs

@@ -272,6 +272,19 @@ impl Connector {
     pub fn set_format(self, format: Format) {
         get!().connector_set_format(self, format);
     }
+
+    /// Sets the color space and transfer function of the connector.
+    ///
+    /// By default, the default values are used which usually means sRGB color space with
+    /// sRGB transfer function.
+    ///
+    /// If the output supports it, HDR10 can be enabled by setting the color space to
+    /// BT.2020 and the transfer function to PQ.
+    ///
+    /// Note that some displays might ignore incompatible settings.
+    pub fn set_colors(self, color_space: ColorSpace, transfer_function: TransferFunction) {
+        get!().connector_set_colors(self, color_space, transfer_function);
+    }
 }
 
 /// Returns all available DRM devices.
@@ -662,3 +675,25 @@ impl Format {
     pub const ABGR16161616F: Self = Self(26);
     pub const XBGR16161616F: Self = Self(27);
 }
+
+/// A color space.
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub struct ColorSpace(pub u32);
+
+impl ColorSpace {
+    /// The default color space (usually sRGB).
+    pub const DEFAULT: Self = Self(0);
+    /// The BT.2020 color space.
+    pub const BT2020: Self = Self(1);
+}
+
+/// A transfer function.
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub struct TransferFunction(pub u32);
+
+impl TransferFunction {
+    /// The default transfer function (usually sRGB).
+    pub const DEFAULT: Self = Self(0);
+    /// The PQ transfer function.
+    pub const PQ: Self = Self(1);
+}