Add cursor drawing with a colored rectangle

src/backend.rs

@@ -1,7 +1,7 @@
 use smithay::backend::renderer::element::surface::WaylandSurfaceRenderElement;
 use smithay::backend::renderer::gles::GlesRenderer;
-use smithay::desktop::space::SpaceRenderElements;
 
+use crate::niri::OutputRenderElements;
 use crate::Niri;
 
 pub trait Backend {
@@ -10,6 +10,9 @@ pub trait Backend {
     fn render(
         &mut self,
         niri: &mut Niri,
-        elements: &[SpaceRenderElements<GlesRenderer, WaylandSurfaceRenderElement<GlesRenderer>>],
+        elements: &[OutputRenderElements<
+            GlesRenderer,
+            WaylandSurfaceRenderElement<GlesRenderer>,
+        >],
     );
 }

src/niri.rs

@@ -2,7 +2,11 @@ use std::os::unix::io::AsRawFd;
 use std::sync::Arc;
 use std::time::Duration;
 
-use smithay::desktop::space::space_render_elements;
+use smithay::backend::renderer::element::render_elements;
+use smithay::backend::renderer::element::solid::SolidColorRenderElement;
+use smithay::backend::renderer::utils::CommitCounter;
+use smithay::backend::renderer::ImportAll;
+use smithay::desktop::space::{space_render_elements, SpaceRenderElements};
 use smithay::desktop::{Space, Window, WindowSurfaceType};
 use smithay::input::keyboard::XkbConfig;
 use smithay::input::{Seat, SeatState};
@@ -139,6 +143,29 @@ impl Niri {
             1.,
         )
         .unwrap();
+
+        let mut elements: Vec<_> = elements
+            .into_iter()
+            .map(OutputRenderElements::from)
+            .collect();
+        elements.insert(
+            0,
+            OutputRenderElements::Pointer(SolidColorRenderElement::new(
+                smithay::backend::renderer::element::Id::new(),
+                smithay::utils::Rectangle {
+                    loc: self
+                        .seat
+                        .get_pointer()
+                        .unwrap()
+                        .current_location()
+                        .to_physical_precise_round(1.),
+                    size: (16, 16).into(),
+                },
+                CommitCounter::default(),
+                [1., 0.5, 0., 1.],
+            )),
+        );
+
         backend.render(self, &elements);
 
         let output = self.output.as_ref().unwrap();
@@ -155,6 +182,12 @@ impl Niri {
     }
 }
 
+render_elements! {
+    pub OutputRenderElements<R, E> where R: ImportAll;
+    Space=SpaceRenderElements<R, E>,
+    Pointer = SolidColorRenderElement,
+}
+
 #[derive(Default)]
 pub struct ClientState {
     pub compositor_state: CompositorClientState,

src/tty.rs

@@ -16,7 +16,6 @@ use smithay::backend::renderer::{Bind, ImportEgl};
 use smithay::backend::session::libseat::LibSeatSession;
 use smithay::backend::session::{Event as SessionEvent, Session};
 use smithay::backend::udev::{self, UdevBackend, UdevEvent};
-use smithay::desktop::space::SpaceRenderElements;
 use smithay::output::{Mode, Output, OutputModeSource, PhysicalProperties, Subpixel};
 use smithay::reexports::calloop::timer::{TimeoutAction, Timer};
 use smithay::reexports::calloop::{LoopHandle, RegistrationToken};
@@ -31,6 +30,7 @@ use smithay::utils::DeviceFd;
 use smithay_drm_extras::edid::EdidInfo;
 
 use crate::backend::Backend;
+use crate::niri::OutputRenderElements;
 use crate::{LoopData, Niri};
 
 const BACKGROUND_COLOR: [f32; 4] = [0.1, 0.1, 0.1, 1.];
@@ -66,7 +66,10 @@ impl Backend for Tty {
     fn render(
         &mut self,
         niri: &mut Niri,
-        elements: &[SpaceRenderElements<GlesRenderer, WaylandSurfaceRenderElement<GlesRenderer>>],
+        elements: &[OutputRenderElements<
+            GlesRenderer,
+            WaylandSurfaceRenderElement<GlesRenderer>,
+        >],
     ) {
         let output_device = self.output_device.as_mut().unwrap();
         let drm_compositor = &mut output_device.drm_compositor;

src/winit.rs

@@ -4,13 +4,13 @@ use smithay::backend::renderer::damage::OutputDamageTracker;
 use smithay::backend::renderer::element::surface::WaylandSurfaceRenderElement;
 use smithay::backend::renderer::gles::GlesRenderer;
 use smithay::backend::winit::{self, WinitError, WinitEvent, WinitEventLoop, WinitGraphicsBackend};
-use smithay::desktop::space::SpaceRenderElements;
 use smithay::output::{Mode, Output, PhysicalProperties, Subpixel};
 use smithay::reexports::calloop::timer::{TimeoutAction, Timer};
 use smithay::reexports::calloop::LoopHandle;
 use smithay::utils::{Rectangle, Transform};
 
 use crate::backend::Backend;
+use crate::niri::OutputRenderElements;
 use crate::{LoopData, Niri};
 
 pub struct Winit {
@@ -32,7 +32,10 @@ impl Backend for Winit {
     fn render(
         &mut self,
         _niri: &mut Niri,
-        elements: &[SpaceRenderElements<GlesRenderer, WaylandSurfaceRenderElement<GlesRenderer>>],
+        elements: &[OutputRenderElements<
+            GlesRenderer,
+            WaylandSurfaceRenderElement<GlesRenderer>,
+        >],
     ) {
         let size = self.backend.window_size().physical_size;
         let damage = Rectangle::from_loc_and_size((0, 0), size);