2 files changed, 59 insertions, 0 deletions
diff --git a/src/render_helpers/debug.rs b/src/render_helpers/debug.rs
new file mode 100644
index 00000000..f67abdb3
--- /dev/null
+++ b/src/render_helpers/debug.rs
@@ -0,0 +1,58 @@
+use smithay::backend::renderer::element::solid::SolidColorRenderElement;
+use smithay::backend::renderer::element::{Element, Id, Kind};
+use smithay::backend::renderer::utils::CommitCounter;
+use smithay::utils::Scale;
+
+use super::renderer::NiriRenderer;
+use crate::niri::OutputRenderElements;
+
+pub fn draw_opaque_regions<R: NiriRenderer>(
+    elements: &mut Vec<OutputRenderElements<R>>,
+    scale: Scale<f64>,
+) {
+    let _span = tracy_client::span!("draw_opaque_regions");
+
+    let mut i = 0;
+    while i < elements.len() {
+        let elem = &elements[i];
+        i += 1;
+
+        // HACK
+        if format!("{elem:?}").contains("ExtraDamage") {
+            continue;
+        }
+
+        let geo = elem.geometry(scale);
+        let mut opaque = elem.opaque_regions(scale);
+
+        for rect in &mut opaque {
+            rect.loc += geo.loc;
+        }
+
+        let semitransparent = geo.subtract_rects(opaque.iter().copied());
+
+        for rect in opaque {
+            let color = SolidColorRenderElement::new(
+                Id::new(),
+                rect,
+                CommitCounter::default(),
+                [0., 0., 0.2, 0.2],
+                Kind::Unspecified,
+            );
+            elements.insert(i - 1, OutputRenderElements::SolidColor(color));
+            i += 1;
+        }
+
+        for rect in semitransparent {
+            let color = SolidColorRenderElement::new(
+                Id::new(),
+                rect,
+                CommitCounter::default(),
+                [0.3, 0., 0., 0.3],
+                Kind::Unspecified,
+            );
+            elements.insert(i - 1, OutputRenderElements::SolidColor(color));
+            i += 1;
+        }
+    }
+}
diff --git a/src/render_helpers/mod.rs b/src/render_helpers/mod.rs
index b1f8fd03..c7a4025a 100644
--- a/src/render_helpers/mod.rs
+++ b/src/render_helpers/mod.rs
@@ -19,6 +19,7 @@ use self::primary_gpu_texture::PrimaryGpuTextureRenderElement;
 pub mod border;
 pub mod clipped_surface;
 pub mod damage;
+pub mod debug;
 pub mod offscreen;
 pub mod primary_gpu_texture;
 pub mod render_elements;