Add niri-visual-tests

niri-visual-tests/src/cases/mod.rs

@@ -0,0 +1,21 @@
+use std::time::Duration;
+
+use smithay::backend::renderer::element::RenderElement;
+use smithay::backend::renderer::gles::GlesRenderer;
+use smithay::utils::{Physical, Size};
+
+pub mod tile;
+pub mod window;
+
+pub trait TestCase {
+    fn resize(&mut self, width: i32, height: i32);
+    fn are_animations_ongoing(&self) -> bool {
+        false
+    }
+    fn advance_animations(&mut self, _current_time: Duration) {}
+    fn render(
+        &mut self,
+        renderer: &mut GlesRenderer,
+        size: Size<i32, Physical>,
+    ) -> Vec<Box<dyn RenderElement<GlesRenderer>>>;
+}