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Have PaintLayers own StackingContexts instead of the opposite
Previously, StackingContexts might have a PaintLayer. We switch the ownership, for several reasons: * We want PaintLayers to potentially contain something other than a StackingContext soon. * We want to delay the creation of PaintLayers until the last minute, so that we can synthesize new layers for sandwiched content. This commit also implements the second goal. Instead of creating PaintLayers during layout itself, wait until we are sorting and layerizing a completed DisplayList.
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dbf8c9d2bc
commit
4ca93c39d6
6 changed files with 198 additions and 161 deletions
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@ -1033,22 +1033,23 @@ impl LayoutTask {
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flow::mut_base(flow_ref::deref_mut(layout_root))
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.display_list_building_result
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.add_to(&mut *display_list);
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let paint_layer = PaintLayer::new(layout_root.layer_id(0),
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root_background_color,
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ScrollPolicy::Scrollable);
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let origin = Rect::new(Point2D::new(Au(0), Au(0)), root_size);
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let layer_id = layout_root.layer_id(0);
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let stacking_context = Arc::new(StackingContext::new(display_list,
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&origin,
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&origin,
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0,
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filter::T::new(Vec::new()),
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mix_blend_mode::T::normal,
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Some(paint_layer),
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Matrix4::identity(),
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Matrix4::identity(),
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true,
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false));
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false,
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ScrollPolicy::Scrollable,
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Some(layer_id)));
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let paint_layer = PaintLayer::new(layer_id,
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root_background_color,
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stacking_context.clone());
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if opts::get().dump_display_list {
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println!("#### start printing display list.");
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@ -1058,13 +1059,13 @@ impl LayoutTask {
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println!("{}", serde_json::to_string_pretty(&stacking_context).unwrap());
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}
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rw_data.stacking_context = Some(stacking_context.clone());
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rw_data.stacking_context = Some(stacking_context);
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debug!("Layout done!");
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rw_data.epoch.next();
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self.paint_chan
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.send(LayoutToPaintMsg::PaintInit(rw_data.epoch, stacking_context))
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.send(LayoutToPaintMsg::PaintInit(rw_data.epoch, paint_layer))
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.unwrap();
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}
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});
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