Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-10-19 00:05:36 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Bug 1687409 - Use offscreen surface for backface visibility + non-preserve3d stacking contexts r=nical

Browse Source 
Removes another case of pass through pictures, by handling the rare
case of a stacking context with backface-visibility: false that is
_not_ part of a 3d rendering context as an offscreen surface.

Differential Revision: https://phabricator.services.mozilla.com/D102251
This commit is contained in:
Glenn Watson 2021-01-19 19:58:48 +00:00
parent 8b93f9f4c5
commit 7db4ab6160
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
gfx/wr/webrender/src/scene_building.rs
View File

@ -1575,6 +1575,15 @@ impl<'a> SceneBuilder<'a> {
blit_reason |= BlitReason::ISOLATE;
}
// If backface visibility is explicitly set, force this stacking
// context to be an off-screen surface. If part of a 3d context
// (common case) it will already be an off-screen surface. If
// the backface-vis is used while outside a 3d rendering context,
// this is an edge case.
if !prim_flags.contains(PrimitiveFlags::IS_BACKFACE_VISIBLE) {
blit_reason |= BlitReason::ISOLATE;
}
// If this stacking context has any complex clips, we need to draw it
// to an off-screen surface.
if let Some(clip_id) = clip_id {
@ -3430,11 +3439,6 @@ impl FlattenedStackingContext {
}
}
// If backface visibility is explicitly set.
if !prim_flags.contains(PrimitiveFlags::IS_BACKFACE_VISIBLE) {
return false;
}
// If need to isolate in surface due to clipping / mix-blend-mode
if !blit_reason.is_empty() {
return false;