config: make the blend space configurable

jay-config/src/_private/client.rs

@@ -28,8 +28,8 @@ use {
         theme::{Color, colors::Colorable, sized::Resizable},
         timer::Timer,
         video::{
-            ColorSpace, Connector, DrmDevice, Eotf, Format, GfxApi, Mode, TearingMode, Transform,
-            VrrMode,
+            BlendSpace, ColorSpace, Connector, DrmDevice, Eotf, Format, GfxApi, Mode, TearingMode,
+            Transform, VrrMode,
             connector_type::{CON_UNKNOWN, ConnectorType},
         },
         window::{
@@ -1050,6 +1050,13 @@ impl ConfigClient {
         });
     }
 
+    pub fn connector_set_blend_space(&self, connector: Connector, blend_space: BlendSpace) {
+        self.send(&ClientMessage::ConnectorSetBlendSpace {
+            connector,
+            blend_space,
+        });
+    }
+
     pub fn connector_set_brightness(&self, connector: Connector, brightness: Option<f64>) {
         self.send(&ClientMessage::ConnectorSetBrightness {
             connector,

jay-config/src/_private/ipc.rs

@@ -12,8 +12,8 @@ use {
         theme::{Color, colors::Colorable, sized::Resizable},
         timer::Timer,
         video::{
-            ColorSpace, Connector, DrmDevice, Eotf, Format, GfxApi, TearingMode, Transform,
-            VrrMode, connector_type::ConnectorType,
+            BlendSpace, ColorSpace, Connector, DrmDevice, Eotf, Format, GfxApi, TearingMode,
+            Transform, VrrMode, connector_type::ConnectorType,
         },
         window::{ContentType, TileState, Window, WindowMatcher, WindowType},
         workspace::WorkspaceDisplayOrder,
@@ -764,6 +764,10 @@ pub enum ClientMessage<'a> {
     SetWorkspaceDisplayOrder {
         order: WorkspaceDisplayOrder,
     },
+    ConnectorSetBlendSpace {
+        connector: Connector,
+        blend_space: BlendSpace,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/video.rs

@@ -286,6 +286,13 @@ impl Connector {
         get!().connector_set_colors(self, color_space, eotf);
     }
 
+    /// Sets the space in which blending is performed for this output.
+    ///
+    /// The default is [`BlendSpace::SRGB`]
+    pub fn set_blend_space(self, blend_space: BlendSpace) {
+        get!().connector_set_blend_space(self, blend_space);
+    }
+
     /// Sets the brightness of the output.
     ///
     /// By default or when `brightness` is `None`, the brightness depends on the
@@ -731,3 +738,16 @@ impl Eotf {
     /// The PQ EOTF.
     pub const PQ: Self = Self(1);
 }
+
+/// A space in which color blending is performed.
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub struct BlendSpace(pub u32);
+
+impl BlendSpace {
+    /// The sRGB blend space with sRGB primaries and gamma22 transfer function. This is
+    /// the classic desktop blend space.
+    pub const SRGB: Self = Self(0);
+    /// The linear blend space performs blending in linear space, which is more physically
+    /// correct but leads to much lighter output when blending light and dark colors.
+    pub const LINEAR: Self = Self(1);
+}