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Auto merge of #29745 - mrobinson:compositor-side-scroll-tree, r=mukilan

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Add a compositor-side scroll tree

This will allow the compositor to properly chain scrolling requests up
when a node has reached the extent of the scroll area. In addition, it
removes the use of the deprecated WebRender `scroll()` API. This fixes
scrolling on servo.org.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes:
  - Fix #29402.
  - Fix #27996.
  - Fix #27624.
  - Fix #24028.
  - Fix #23918.
  - Fix #21165.
- [x] There are tests for these changes
This commit is contained in:
bors-servo 2023-05-23 10:51:11 +02:00 • committed by GitHub
commit ec4d90d572
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12 changed files with 677 additions and 102 deletions
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12
components/layout_thread/lib.rs
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@ -1064,21 +1064,19 @@ impl LayoutThread {
debug!("Layout done!");
// TODO: Avoid the temporary conversion and build webrender sc/dl directly!
let (builder, compositor_info, is_contentful) =
display_list.convert_to_webrender(self.id);
let viewport_size = Size2D::new(
let viewport_size = webrender_api::units::LayoutSize::new(
self.viewport_size.width.to_f32_px(),
self.viewport_size.height.to_f32_px(),
);
// TODO: Avoid the temporary conversion and build webrender sc/dl directly!
let (builder, compositor_info, is_contentful) =
display_list.convert_to_webrender(self.id, viewport_size);
let mut epoch = self.epoch.get();
epoch.next();
self.epoch.set(epoch);
let viewport_size = webrender_api::units::LayoutSize::from_untyped(viewport_size);
// Observe notifications about rendered frames if needed right before
// sending the display list to WebRender in order to set time related
// Progressive Web Metrics.