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Layerize canvas

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Note that this keeps using readback right now, `NativeSurface` painting
will be implemented soon.

Also see https://github.com/servo/servo/issues/6142
This commit is contained in:
ecoal95 2015-05-20 10:29:08 +02:00
parent 6481058309
commit 3350522306
35 changed files with 769 additions and 500 deletions
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13
components/layout/fragment.rs
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@ -6,7 +6,7 @@
#![deny(unsafe_code)]
use canvas::canvas_msg::CanvasMsg;
use canvas_traits::CanvasMsg;
use css::node_style::StyledNode;
use context::LayoutContext;
use floats::ClearType;
@ -195,9 +195,7 @@ impl SpecificFragmentInfo {
SpecificFragmentInfo::Iframe(_) => "SpecificFragmentInfo::Iframe",
SpecificFragmentInfo::Image(_) => "SpecificFragmentInfo::Image",
SpecificFragmentInfo::InlineAbsolute(_) => "SpecificFragmentInfo::InlineAbsolute",
SpecificFragmentInfo::InlineAbsoluteHypothetical(_) => {
"SpecificFragmentInfo::InlineAbsoluteHypothetical"
}
SpecificFragmentInfo::InlineAbsoluteHypothetical(_) => "SpecificFragmentInfo::InlineAbsoluteHypothetical",
SpecificFragmentInfo::InlineBlock(_) => "SpecificFragmentInfo::InlineBlock",
SpecificFragmentInfo::ScannedText(_) => "SpecificFragmentInfo::ScannedText",
SpecificFragmentInfo::Table => "SpecificFragmentInfo::Table",
@ -1993,6 +1991,13 @@ impl Fragment {
if self.style().get_effects().transform.is_some() {
return true
}
// Canvas always layerizes, as an special case
// FIXME(pcwalton): Don't unconditionally form stacking contexts for each canvas.
if let SpecificFragmentInfo::Canvas(_) = self.specific {
return true
}
match self.style().get_box().position {
position::T::absolute | position::T::fixed => {
// FIXME(pcwalton): This should only establish a new stacking context when