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Paint worklet size should agree with Chrome.

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This commit is contained in:
Alan Jeffrey 2017-06-21 12:56:21 -05:00
parent b211664e87
commit dded87e402
6 changed files with 75 additions and 2 deletions
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8
components/layout/display_list_builder.rs
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@ -1154,10 +1154,14 @@ impl FragmentDisplayListBuilding for Fragment {
paint_worklet: &PaintWorklet,
index: usize)
{
// TODO: check that this is the servo equivalent of "concrete object size".
// This should be the "concrete object size" of the fragment.
// https://drafts.css-houdini.org/css-paint-api/#draw-a-paint-image
// https://drafts.csswg.org/css-images-3/#concrete-object-size
let size = self.content_box().size.to_physical(style.writing_mode);
// Experimentally, chrome is using the size in px of the box,
// including padding, but not border or margin, so we follow suit.
// https://github.com/w3c/css-houdini-drafts/issues/417
let unbordered_box = self.border_box - style.logical_border_width();
let size = unbordered_box.size.to_physical(style.writing_mode);
let name = paint_worklet.name.clone();
// If the script thread has not added any paint worklet modules, there is nothing to do!