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Split out layered child stacking contexts in display lists

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This patch is in preparation for more dynamic layerization of the
pieces of display lists. It also prevents having to sort the children
by z-index multiple times.
This commit is contained in:
Martin Robinson 2015-08-26 08:17:40 -07:00
parent a8c62f0f28
commit 1c09b1d8aa
2 changed files with 42 additions and 20 deletions
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10
components/gfx/paint_task.rs
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@ -28,7 +28,6 @@ use profile_traits::mem::{self, ReportsChan};
use profile_traits::time::{self, profile};
use rand::{self, Rng};
use skia::gl_context::GLContext;
use smallvec::SmallVec;
use std::borrow::ToOwned;
use std::collections::HashMap;
use std::mem as std_mem;
@ -394,14 +393,11 @@ impl<C> PaintTask<C> where C: PaintListener + Send + 'static {
}
};
// Sort positioned children according to z-index.
let mut positioned_children: SmallVec<[Arc<StackingContext>; 8]> = SmallVec::new();
for kid in &stacking_context.display_list.children {
positioned_children.push((*kid).clone());
for kid in stacking_context.display_list.children.iter() {
build(properties, &**kid, &page_position, &transform, &perspective, next_parent_id)
}
positioned_children.sort_by(|this, other| this.z_index.cmp(&other.z_index));
for kid in positioned_children.iter() {
for kid in stacking_context.display_list.layered_children.iter() {
build(properties, &**kid, &page_position, &transform, &perspective, next_parent_id)
}
}