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Accumulate and invert stacking context transform for hit tests.

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This makes hit tests work on stacking contexts with transforms.

Ref #6643.
This commit is contained in:
Glenn Watson 2015-07-28 13:41:24 +10:00
parent e0bd80f807
commit ddef25030b
4 changed files with 68 additions and 67 deletions
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5
components/gfx/display_list/mod.rs
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@ -544,8 +544,9 @@ impl StackingContext {
point = point - self.bounds.origin;
debug_assert!(!topmost_only || result.is_empty());
let frac_point = self.transform.transform_point(&Point2D::new(point.x.to_f32_px(),
point.y.to_f32_px()));
let inv_transform = self.transform.invert();
let frac_point = inv_transform.transform_point(&Point2D::new(point.x.to_f32_px(),
point.y.to_f32_px()));
point = Point2D::new(Au::from_f32_px(frac_point.x), Au::from_f32_px(frac_point.y));
// Iterate through display items in reverse stacking order. Steps here refer to the