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Integrate Canvas into the DisplayList

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Canvas is currently given a layer at the stacking context level.
Instead it's DisplayItem should be given a layer directly. This fixes
painting order issues where canvases are painted on top of other
positioned content that is later in tree order. It always simplifies
the code a bit.
This commit is contained in:
Martin Robinson 2015-10-21 14:00:20 -07:00
parent 11d23a41b3
commit 30ba65b360
5 changed files with 83 additions and 74 deletions
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11
components/layout/inline.rs
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@ -10,7 +10,7 @@ use context::LayoutContext;
use display_list_builder::{FragmentDisplayListBuilding, InlineFlowDisplayListBuilding};
use euclid::{Point2D, Rect, Size2D};
use floats::{FloatKind, Floats, PlacementInfo};
use flow::{EarlyAbsolutePositionInfo, LAYERS_NEEDED_FOR_DESCENDANTS, MutableFlowUtils, OpaqueFlow};
use flow::{EarlyAbsolutePositionInfo, MutableFlowUtils, OpaqueFlow};
use flow::{self, BaseFlow, Flow, FlowClass, ForceNonfloatedFlag, IS_ABSOLUTELY_POSITIONED};
use flow_ref;
use fragment::{CoordinateSystem, Fragment, FragmentBorderBoxIterator, SpecificFragmentInfo};
@ -1467,7 +1467,6 @@ impl Flow for InlineFlow {
// Now, go through each line and lay out the fragments inside.
let mut line_distance_from_flow_block_start = Au(0);
let mut layers_needed_for_descendants = false;
let line_count = self.lines.len();
for line_index in 0..line_count {
let line = &mut self.lines[line_index];
@ -1496,10 +1495,6 @@ impl Flow for InlineFlow {
for fragment_index in line.range.each_index() {
let fragment = &mut self.fragments.fragments[fragment_index.to_usize()];
if fragment.needs_layered_stacking_context() && !fragment.is_positioned() {
layers_needed_for_descendants = true
}
let InlineMetrics {
mut block_size_above_baseline,
mut depth_below_baseline,
@ -1596,10 +1591,6 @@ impl Flow for InlineFlow {
kid.assign_block_size_for_inorder_child_if_necessary(layout_context, thread_id);
}
// Mark ourselves for layerization if that will be necessary to paint in the proper
// order (CSS 2.1, Appendix E).
self.base.flags.set(LAYERS_NEEDED_FOR_DESCENDANTS, layers_needed_for_descendants);
if self.contains_positioned_fragments() {
// Assign block-sizes for all flows in this absolute flow tree.
// This is preorder because the block-size of an absolute flow may depend on