Refactor: turn ClippedShape from struct-enum to a normal struct (#3225)

crates/epaint/benches/benchmark.rs

@@ -47,7 +47,7 @@ fn tessellate_circles(c: &mut Criterion) {
             for _ in 0..10_000 {
                 let clip_rect = Rect::from_min_size(Pos2::ZERO, Vec2::splat(1024.0));
                 let shape = Shape::circle_filled(Pos2::new(10.0, 10.0), r, Color32::WHITE);
-                clipped_shapes.push(ClippedShape(clip_rect, shape));
+                clipped_shapes.push(ClippedShape { clip_rect, shape });
             }
         }
         assert_eq!(clipped_shapes.len(), 100_000);

crates/epaint/src/lib.rs

@@ -90,13 +90,14 @@ impl Default for TextureId {
 ///
 /// Everything is using logical points.
 #[derive(Clone, Debug, PartialEq)]
-pub struct ClippedShape(
+pub struct ClippedShape {
     /// Clip / scissor rectangle.
     /// Only show the part of the [`Shape`] that falls within this.
-    pub emath::Rect,
+    pub clip_rect: emath::Rect,
+
     /// The shape
-    pub Shape,
-);
+    pub shape: Shape,
+}
 
 /// A [`Mesh`] or [`PaintCallback`] within a clip rectangle.
 ///

crates/epaint/src/stats.rs

@@ -183,7 +183,7 @@ impl PaintStats {
         stats.shape_vec.element_size = ElementSize::Heterogenous; // nicer display later
 
         stats.shapes = AllocInfo::from_slice(shapes);
-        for ClippedShape(_, shape) in shapes {
+        for ClippedShape { shape, .. } in shapes {
             stats.add(shape);
         }
         stats

crates/epaint/src/tessellator.rs

@@ -1036,7 +1036,10 @@ impl Tessellator {
         clipped_shape: ClippedShape,
         out_primitives: &mut Vec<ClippedPrimitive>,
     ) {
-        let ClippedShape(new_clip_rect, new_shape) = clipped_shape;
+        let ClippedShape {
+            clip_rect: new_clip_rect,
+            shape: new_shape,
+        } = clipped_shape;
 
         if !new_clip_rect.is_positive() {
             return; // skip empty clip rectangles
@@ -1044,7 +1047,13 @@ impl Tessellator {
 
         if let Shape::Vec(shapes) = new_shape {
             for shape in shapes {
-                self.tessellate_clipped_shape(ClippedShape(new_clip_rect, shape), out_primitives);
+                self.tessellate_clipped_shape(
+                    ClippedShape {
+                        clip_rect: new_clip_rect,
+                        shape,
+                    },
+                    out_primitives,
+                );
             }
             return;
         }
@@ -1641,7 +1650,10 @@ fn test_tessellator() {
     shapes.push(Shape::mesh(mesh));
 
     let shape = Shape::Vec(shapes);
-    let clipped_shapes = vec![ClippedShape(rect, shape)];
+    let clipped_shapes = vec![ClippedShape {
+        clip_rect: rect,
+        shape,
+    }];
 
     let font_tex_size = [1024, 1024]; // unused
     let prepared_discs = vec![]; // unused