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Auto merge of #29965 - mrobinson:clip-chain, r=delan
Use the WebRender clip chain API The old clipping API has been removed from WebRender, so this switches both legacy and new layout over to use the clip chain API in preparation for the WebRender upgrade. <!-- Please describe your changes on the following line: --> --- <!-- 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] There are tests for these changes OR <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
This commit is contained in:
bors-servo
GitHub
commit
ff82d479c9
4 changed files with 165 additions and 114 deletions
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@ -37,7 +37,7 @@ pub(crate) struct ContainingBlock {
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/// The WebRender ClipId to use for this children of this containing
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/// block.
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clip_id: wr::ClipId,
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clip_chain_id: wr::ClipChainId,
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/// The physical rect of this containing block.
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rect: PhysicalRect<Length>,
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@ -47,11 +47,11 @@ impl ContainingBlock {
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pub(crate) fn new(
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rect: &PhysicalRect<Length>,
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scroll_node_id: ScrollTreeNodeId,
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clip_id: wr::ClipId,
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clip_chain_id: wr::ClipChainId,
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) -> Self {
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ContainingBlock {
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scroll_node_id,
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clip_id,
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clip_chain_id,
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rect: *rect,
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}
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}
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@ -76,15 +76,19 @@ pub(crate) enum StackingContextSection {
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impl DisplayList {
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pub fn build_stacking_context_tree(&mut self, fragment_tree: &FragmentTree) -> StackingContext {
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let root_clip_chain_id = self
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.wr
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.define_clip_chain(None, [wr::ClipId::root(self.wr.pipeline_id)]);
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let cb_for_non_fixed_descendants = ContainingBlock::new(
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&fragment_tree.initial_containing_block,
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self.compositor_info.root_scroll_node_id,
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wr::ClipId::root(self.wr.pipeline_id),
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root_clip_chain_id,
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);
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let cb_for_fixed_descendants = ContainingBlock::new(
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&fragment_tree.initial_containing_block,
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self.compositor_info.root_reference_frame_id,
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wr::ClipId::root(self.wr.pipeline_id),
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root_clip_chain_id,
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);
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// We need to specify all three containing blocks here, because absolute
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@ -142,27 +146,40 @@ impl DisplayList {
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fn define_scroll_frame(
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&mut self,
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parent_scroll_node_id: &ScrollTreeNodeId,
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parent_clip_id: &wr::ClipId,
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parent_clip_chain_id: &wr::ClipChainId,
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external_id: wr::ExternalScrollId,
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content_rect: LayoutRect,
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clip_rect: LayoutRect,
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scroll_sensitivity: wr::ScrollSensitivity,
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external_scroll_offset: LayoutVector2D,
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) -> (ScrollTreeNodeId, wr::ClipId) {
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let new_space_and_clip = self.wr.define_scroll_frame(
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&wr::SpaceAndClipInfo {
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spatial_id: parent_scroll_node_id.spatial_id,
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clip_id: *parent_clip_id,
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},
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Some(external_id),
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content_rect,
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clip_rect,
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scroll_sensitivity,
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external_scroll_offset,
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);
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) -> (ScrollTreeNodeId, wr::ClipChainId) {
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let parent_space_and_clip_info = wr::SpaceAndClipInfo {
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spatial_id: parent_scroll_node_id.spatial_id,
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clip_id: wr::ClipId::root(self.wr.pipeline_id),
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};
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let new_clip_id = self
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.wr
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.define_clip_rect(&parent_space_and_clip_info, clip_rect);
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let new_clip_chain_id = self
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.wr
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.define_clip_chain(Some(*parent_clip_chain_id), [new_clip_id]);
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let new_spatial_id = self
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.wr
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.define_scroll_frame(
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&parent_space_and_clip_info,
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Some(external_id),
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content_rect,
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clip_rect,
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scroll_sensitivity,
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external_scroll_offset,
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)
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.spatial_id;
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let new_scroll_node_id = self.compositor_info.scroll_tree.add_scroll_tree_node(
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Some(&parent_scroll_node_id),
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new_space_and_clip.spatial_id,
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new_spatial_id,
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Some(ScrollableNodeInfo {
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external_id,
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scrollable_size: content_rect.size - clip_rect.size,
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@ -170,13 +187,13 @@ impl DisplayList {
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offset: LayoutVector2D::zero(),
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}),
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);
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(new_scroll_node_id, new_space_and_clip.clip_id)
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(new_scroll_node_id, new_clip_chain_id)
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}
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}
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pub(crate) struct StackingContextFragment {
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scroll_node_id: ScrollTreeNodeId,
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clip_id: wr::ClipId,
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clip_chain_id: wr::ClipChainId,
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section: StackingContextSection,
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containing_block: PhysicalRect<Length>,
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fragment: ArcRefCell<Fragment>,
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@ -185,7 +202,7 @@ pub(crate) struct StackingContextFragment {
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impl StackingContextFragment {
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fn build_display_list(&self, builder: &mut DisplayListBuilder) {
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builder.current_scroll_node_id = self.scroll_node_id;
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builder.current_clip_id = self.clip_id;
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builder.current_clip_id = wr::ClipId::ClipChain(self.clip_chain_id);
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self.fragment
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.borrow()
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.build_display_list(builder, &self.containing_block, self.section);
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@ -346,7 +363,7 @@ impl StackingContext {
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LayoutPoint::zero(), // origin
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self.spatial_id,
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style.get_webrender_primitive_flags(),
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None, // clip_id
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None, // clip_chain_id
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style.get_used_transform_style().to_webrender(),
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effects.mix_blend_mode.to_webrender(),
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&filters,
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@ -608,7 +625,7 @@ impl Fragment {
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stacking_context.fragments.push(StackingContextFragment {
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section: StackingContextSection::Content,
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scroll_node_id: containing_block.scroll_node_id,
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clip_id: containing_block.clip_id,
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clip_chain_id: containing_block.clip_chain_id,
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containing_block: containing_block.rect,
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fragment: fragment_ref.clone(),
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});
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@ -721,7 +738,7 @@ impl BoxFragment {
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.rect
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.translate(-reference_frame_data.origin.to_vector()),
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new_spatial_id,
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containing_block.clip_id,
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containing_block.clip_chain_id,
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);
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let new_containing_block_info =
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containing_block_info.new_for_non_absolute_descendants(&adjusted_containing_block);
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@ -796,19 +813,19 @@ impl BoxFragment {
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stacking_context: &mut StackingContext,
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) {
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let mut new_scroll_node_id = containing_block.scroll_node_id;
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let mut new_clip_id = containing_block.clip_id;
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if let Some(clip_id) = self.build_clip_frame_if_necessary(
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let mut new_clip_chain_id = containing_block.clip_chain_id;
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if let Some(clip_chain_id) = self.build_clip_frame_if_necessary(
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display_list,
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&new_scroll_node_id,
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&new_clip_id,
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&new_clip_chain_id,
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&containing_block.rect,
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) {
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new_clip_id = clip_id;
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new_clip_chain_id = clip_chain_id;
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}
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stacking_context.fragments.push(StackingContextFragment {
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scroll_node_id: new_scroll_node_id,
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clip_id: new_clip_id,
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clip_chain_id: new_clip_chain_id,
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section: self.get_stacking_context_section(),
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containing_block: containing_block.rect,
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fragment: fragment.clone(),
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@ -816,7 +833,7 @@ impl BoxFragment {
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if self.style.get_outline().outline_width.px() > 0.0 {
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stacking_context.fragments.push(StackingContextFragment {
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scroll_node_id: new_scroll_node_id,
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clip_id: new_clip_id,
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clip_chain_id: new_clip_chain_id,
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section: StackingContextSection::Outline,
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containing_block: containing_block.rect,
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fragment: fragment.clone(),
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@ -825,14 +842,14 @@ impl BoxFragment {
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// We want to build the scroll frame after the background and border, because
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// they shouldn't scroll with the rest of the box content.
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if let Some((scroll_node_id, clip_id)) = self.build_scroll_frame_if_necessary(
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if let Some((scroll_node_id, clip_chain_id)) = self.build_scroll_frame_if_necessary(
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display_list,
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&new_scroll_node_id,
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&new_clip_id,
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&new_clip_chain_id,
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&containing_block.rect,
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) {
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new_scroll_node_id = scroll_node_id;
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new_clip_id = clip_id;
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new_clip_chain_id = clip_chain_id;
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}
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let padding_rect = self
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@ -845,9 +862,9 @@ impl BoxFragment {
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.translate(containing_block.rect.origin.to_vector());
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let for_absolute_descendants =
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ContainingBlock::new(&padding_rect, new_scroll_node_id, new_clip_id);
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ContainingBlock::new(&padding_rect, new_scroll_node_id, new_clip_chain_id);
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let for_non_absolute_descendants =
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ContainingBlock::new(&content_rect, new_scroll_node_id, new_clip_id);
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ContainingBlock::new(&content_rect, new_scroll_node_id, new_clip_chain_id);
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// Create a new `ContainingBlockInfo` for descendants depending on
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// whether or not this fragment establishes a containing block for
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@ -887,9 +904,9 @@ impl BoxFragment {
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&self,
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display_list: &mut DisplayList,
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parent_scroll_node_id: &ScrollTreeNodeId,
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parent_clip_id: &wr::ClipId,
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parent_clip_chain_id: &wr::ClipChainId,
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containing_block_rect: &PhysicalRect<Length>,
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) -> Option<wr::ClipId> {
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) -> Option<wr::ClipChainId> {
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let position = self.style.get_box().position;
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// https://drafts.csswg.org/css2/#clipping
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// The clip property applies only to absolutely positioned elements
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@ -911,22 +928,28 @@ impl BoxFragment {
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.translate(containing_block_rect.origin.to_vector())
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.to_webrender();
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Some(display_list.wr.define_clip_rect(
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&wr::SpaceAndClipInfo {
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spatial_id: parent_scroll_node_id.spatial_id,
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clip_id: *parent_clip_id,
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},
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clip_rect,
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))
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let parent_space_and_clip = &wr::SpaceAndClipInfo {
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spatial_id: parent_scroll_node_id.spatial_id,
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clip_id: wr::ClipId::root(display_list.wr.pipeline_id),
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};
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let clip_id = display_list
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.wr
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.define_clip_rect(&parent_space_and_clip, clip_rect);
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Some(
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display_list
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.wr
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.define_clip_chain(Some(*parent_clip_chain_id), [clip_id]),
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)
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}
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fn build_scroll_frame_if_necessary(
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&self,
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display_list: &mut DisplayList,
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parent_scroll_node_id: &ScrollTreeNodeId,
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parent_clip_id: &wr::ClipId,
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parent_clip_id: &wr::ClipChainId,
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containing_block_rect: &PhysicalRect<Length>,
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) -> Option<(ScrollTreeNodeId, wr::ClipId)> {
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) -> Option<(ScrollTreeNodeId, wr::ClipChainId)> {
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let overflow_x = self.style.get_box().overflow_x;
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let overflow_y = self.style.get_box().overflow_y;
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if overflow_x == ComputedOverflow::Visible && overflow_y == ComputedOverflow::Visible {
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