diff options
| -rw-r--r-- | tiny_skia/src/layer.rs | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tiny_skia/src/layer.rs b/tiny_skia/src/layer.rs index ec87c2bf..3e42e4aa 100644 --- a/tiny_skia/src/layer.rs +++ b/tiny_skia/src/layer.rs @@ -174,10 +174,20 @@ impl Layer { } pub fn damage(previous: &Self, current: &Self) -> Vec<Rectangle> { + if previous.bounds != current.bounds { + return vec![previous.bounds, current.bounds]; + } + let mut damage = damage::list( &previous.quads, ¤t.quads, - |(quad, _)| vec![quad.bounds.expand(1.0)], + |(quad, _)| { + quad.bounds + .expand(1.0) + .intersection(¤t.bounds) + .into_iter() + .collect() + }, |(quad_a, background_a), (quad_b, background_b)| { quad_a == quad_b && background_a == background_b }, |