render: implement a vulkan renderer

jay-config/src/_private/client.rs

@@ -15,7 +15,7 @@ use {
         timer::Timer,
         video::{
             connector_type::{ConnectorType, CON_UNKNOWN},
-            Connector, DrmDevice, Mode,
+            Connector, DrmDevice, GfxApi, Mode,
         },
         Axis, Direction, ModifiedKeySym, PciId, Workspace,
     },
@@ -506,6 +506,10 @@ impl Client {
         self.send(&ClientMessage::MakeRenderDevice { device });
     }
 
+    pub fn set_gfx_api(&self, device: Option<DrmDevice>, api: GfxApi) {
+        self.send(&ClientMessage::SetGfxApi { device, api });
+    }
+
     pub fn connector_connected(&self, connector: Connector) -> bool {
         let res = self.send_with_response(&ClientMessage::ConnectorConnected { connector });
         get_response!(res, false, ConnectorConnected { connected });

jay-config/src/_private/ipc.rs

@@ -5,7 +5,7 @@ use {
         logging::LogLevel,
         theme::{colors::Colorable, sized::Resizable, Color},
         timer::Timer,
-        video::{connector_type::ConnectorType, Connector, DrmDevice},
+        video::{connector_type::ConnectorType, Connector, DrmDevice, GfxApi},
         Axis, Direction, PciId, Workspace,
     },
     bincode::{BorrowDecode, Decode, Encode},
@@ -334,6 +334,10 @@ pub enum ClientMessage<'a> {
         device: InputDevice,
         enabled: bool,
     },
+    SetGfxApi {
+        device: Option<DrmDevice>,
+        api: GfxApi,
+    },
 }
 
 #[derive(Encode, Decode, Debug)]

jay-config/src/video.rs

@@ -362,4 +362,30 @@ impl DrmDevice {
     pub fn make_render_device(self) {
         get!().make_render_device(self);
     }
+
+    /// Sets the preferred graphics API for this device.
+    ///
+    /// If the API cannot be used, the compositor will try other APIs.
+    pub fn set_gfx_api(self, gfx_api: GfxApi) {
+        get!().set_gfx_api(Some(self), gfx_api);
+    }
+}
+
+/// A graphics API.
+#[non_exhaustive]
+#[derive(Encode, Decode, Copy, Clone, Debug, Hash, Eq, PartialEq)]
+pub enum GfxApi {
+    OpenGl,
+    Vulkan,
+}
+
+/// Sets the default graphics API.
+///
+/// If the API cannot be used, the compositor will try other APIs.
+///
+/// This setting can be overwritten per-device with [DrmDevice::set_gfx_api].
+///
+/// This call has no effect on devices that have already been initialized.
+pub fn set_gfx_api(gfx_api: GfxApi) {
+    get!().set_gfx_api(None, gfx_api);
 }