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gfx: Stop cloning clipping regions so much.

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Clipping regions can contain vectors and so can be expensive to copy.
This commit is contained in:
Patrick Walton 2016-03-02 11:50:21 -08:00
parent 983576ebaa
commit 940bff1f9c
5 changed files with 52 additions and 52 deletions
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9
components/gfx/display_list/mod.rs
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@ -761,16 +761,13 @@ impl ClippingRegion {
}
}
/// Returns the intersection of this clipping region and the given rectangle.
/// Mutates this clipping region to intersect with the given rectangle.
///
/// TODO(pcwalton): This could more eagerly eliminate complex clipping regions, at the cost of
/// complexity.
#[inline]
pub fn intersect_rect(self, rect: &Rect<Au>) -> ClippingRegion {
ClippingRegion {
main: self.main.intersection(rect).unwrap_or(Rect::zero()),
complex: self.complex,
}
pub fn intersect_rect(&mut self, rect: &Rect<Au>) {
self.main = self.main.intersection(rect).unwrap_or(Rect::zero())
}
/// Returns true if this clipping region might be nonempty. This can return false positives,