This ensures the commands to delete compositables are received by WR in the same
transaction as the updates to the display list that removes the references to
those compositables. Otherwise, WR can try to do a scene build on the intermediate
state which results in missing pipeline errors.
MozReview-Commit-ID: ByOHCFWSSjt
--HG--
extra : rebase_source : bcc0f129cbd75e3e9e3543236591b22687d39090
When a transform thinks it's animated we should abandon screen rasterization
and instead favour local rasterization. This produces a more visually
pleasant rendering, as pixel-snapping "wobbles" the text between
frames.
The float scale of GlyphRasterSpace::Local is currently unused, but this
PR tries its best to set it to a reasonable value, based on discussion
with glennw about the intended semantics. We agreed it should specify
the scale *relative* to the parent stacking context, which means it's
just whatever scaling the stacking context's transform applies. It's
possible we'll need to clamp this value or make it properly 2-dimensional
later on.
Some book-keeping is added to StackingContextHelper to ensure that
GlyphRasterSpace::Screen is never requested by a descendent
of a stacking context using GlyphRasterSpace::Local.
nsDisplayMask is changed to use a StackingContextHelper to ensure
rasterSpace is properly propagated.
In addition, this is the first commit making use of cbindgen's new support
for bridging Rust enums natively into C++! This bumps our minimum cbindgen
to 6.0.0 (just released).
MozReview-Commit-ID: 9AlsB6nUheB
--HG--
extra : rebase_source : 247e5b197e998682cb4bb74f6f9319a9a4dd3264
When a transform thinks it's animated we should abandon screen rasterization
and instead favour local rasterization. This produces a more visually
pleasant rendering, as pixel-snapping "wobbles" the text between
frames.
The float scale of GlyphRasterSpace::Local is currently unused, but this
PR tries its best to set it to a reasonable value, based on discussion
with glennw about the intended semantics. We agreed it should specify
the scale *relative* to the parent stacking context, which means it's
just whatever scaling the stacking context's transform applies. It's
possible we'll need to clamp this value or make it properly 2-dimensional
later on.
Some book-keeping is added to StackingContextHelper to ensure that
GlyphRasterSpace::Screen is never requested by a descendent
of a stacking context using GlyphRasterSpace::Local.
nsDisplayMask is changed to use a StackingContextHelper to ensure
rasterSpace is properly propagated.
In addition, this is the first commit making use of cbindgen's new support
for bridging Rust enums natively into C++! This bumps our minimum cbindgen
to 6.0.0 (just released).
MozReview-Commit-ID: 9AlsB6nUheB
--HG--
extra : rebase_source : 978e51dbedeb1542e0829752b7f828ffeb2872e9
The TransactionBuilder class comes with a bunch of baggage (it
automatically allocates/deallocates a transaction under the hood) which
we will want to avoid for the RB callbacks into APZ. This patch adds a
lightweight TransactionWrapper class that APZ can use to provide the
async transform info and that will be simpler to use in the callback
from rust code.
MozReview-Commit-ID: 1ywhx4TIzGd
--HG--
extra : rebase_source : 0ac4356554db24806d03b44f5384f9b7341d4255
Although they still happen in the same transaction, they are done in two
separate frame messages. This results in better encapsulated code on the
C++ side since we don't have to pass around an array of properties, and
will simplify future changes to update these properties at render time
rather than at GenerateFrame time.
MozReview-Commit-ID: 9qUkHX7gmD1
--HG--
extra : rebase_source : 15a319ba270eb1783815c514ae05c6a72e323dac
This was only recently made possible by webrender#2600, which introduced special stacking-context
clips
MozReview-Commit-ID: HQAU7IsfDaz
--HG--
extra : rebase_source : 0ac7f0f3f73abdf5b60ca02b37cfaa7abeecb6a3
This is all the (bidirectional) glue that connects the SceneBuilderHooks
to the APZUpdater.
MozReview-Commit-ID: JIqUaClVa57
--HG--
extra : rebase_source : c6da81e63793570f79cdfa153f6d33d2ac05bdf6
This includes a signature change from CompositorBridgeParentBase ->
CompositorBridgeParent which is not strictly required, but it makes it less
likely that we'll accidentally create a WebRenderAPI from somewhere else
and pass a nonsense window id. In effect, the signature change makes it
likely that only CompositorBridgeParent will allocate the window ids.
MozReview-Commit-ID: 8AnnmI8RytR
--HG--
extra : rebase_source : 6fd957c4a9e5bb2175bee2cc89f7eb6d27a6bc9e
When comparing a Maybe<WrScrollId> to another WrScrollId we need to properly
handle the case where Nothing() signifies the root scroll frame. This is
equivalent to calling scrollId.valueOr(FrameMetrics::NULL_SCROLL_ID), as was
done before WrScrolLId replaced ViewId in the WebRender ScrollingLayersHelper.
We also have DisplayListBuilder::TopmostScrollId always return a value instead
of a Maybe, since an empty clip stack means that the current scroll id is that
of the root scroll frame.
Previously Nothing() was not equivalent to WrScrollId { 0 }, which caused the
ScrollingLayersHelper to fill the mClipAndScroll value and push another
set of clip and scroll nodes onto the WebRender display list builder.
MozReview-Commit-ID: CeatZlRXtuI
This exposes some functions on wr::DisplayListBuilder to set hit-test
info and to do hit-tests.
The mechanism to set hit-test info is made a little more generic than is
actually used in this patchset, because doing it this way allows for
more optimization possibilities.
Specifically, the API allows setting some hit-testing state which is then
applied to all display items that are created until that state is
updated or cleared. An alternative would be to specify the hit-testing
state explicitly when creating particular display items; however doing
that would force the call sites that create the display items to compute
or obtain the hit-testing state, which would make the code less
encapsulated and harder to refactor/optimize.
MozReview-Commit-ID: EJoCFv83iu8
--HG--
extra : rebase_source : d2a117a52144f76dcc312de2a4047298e78135cb
There are cases where we do a main-thread paint at a scroll position
where sticky offsets have been applied in order to keep sticky items
visually unmoving. From that paint, it's possible to do an async-scroll
in the direction that reduces the sticky offset. In order for WR to
handle this case properly we need to tell WR how much of a sticky offset
was already applied on the main thread.
MozReview-Commit-ID: 79DsfPpsIfA
--HG--
extra : rebase_source : e39316702cff3bd4ee6721c7503a1a9267734cd8
This patch was generated automatically by the "modeline.py" script, available
here: https://github.com/amccreight/moz-source-tools/blob/master/modeline.py
For every file that is modified in this patch, the changes are as follows:
(1) The patch changes the file to use the exact C++ mode lines from the
Mozilla coding style guide, available here:
https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Mode_Line
(2) The patch deletes any blank lines between the mode line & the MPL
boilerplate comment.
(3) If the file previously had the mode lines and MPL boilerplate in a
single contiguous C++ comment, then the patch splits them into
separate C++ comments, to match the boilerplate in the coding style.
MozReview-Commit-ID: 77D61xpSmIl
--HG--
extra : rebase_source : c6162fa3cf539a07177a19838324bf368faa162b
This edge case happens when:
- we have a display item A nested inside another display item B
- B has pushed an out-of-band clip, and
- A's clip chain doesn't connect directly to the end of B's clip chain
but instead connects somewhere farther up the clip chain
See comments in the patch for more details.
MozReview-Commit-ID: 4mCCaVUQuvH
--HG--
extra : rebase_source : 1601a8f0c586d618d395b4e20086b9ecd318945b
This does 3 things that were all a bit too intermixed to split out cleanly:
1. Teaches TextDrawTarget to handle rectangular clips (while also completely
forbidding other ones). This is necessary to handle how gecko "overdraws"
decorations with clips to create the illusion of continuous lines when they're
actually made out of multiple lines, possibly from different display items
with different lines. Previously gecko *was* handing these clips to
TextDrawTarget to use these clips, but we were just ignoring them.
This is also necessary work to support partial glyphs natively (which apply
rectangular clips to glyphs). Also note that this currently causes a bug
in webrender if combined with zero-blur shadows, but it's not a regression
since we already mishandle clipped decorations. I will work on fixing this
upstream.
2. Changes the intermediate representation of lines from the old webrender
format to a rect-based one. This is in preperation for webrender adopting
that format in a future update.
3. Changes the way wavy lines are processed, correcting some errors in the
old wavy line bindings that lead to them being positioned incorrectly. Also
introduces a wavyLineThickness property that the will be required in a
future webrender update. Wavy lines are unlike any other line, so it's
ultimately desirable to distinguish them.
The net result of these changes is that a companion upstream change (webrender#1923)
will make decoration rendering nearly identical to gecko, and much nicer.
However the clipped shadows issue will need to be seperately resolved before
actually closing this issue.
MozReview-Commit-ID: 6O2wLA6bU3C
--HG--
extra : rebase_source : 17254c45145229b75f77f87f85874e66e6edd05e
This does 3 things that were all a bit too intermixed to split out cleanly:
1. Teaches TextDrawTarget to handle rectangular clips (while also completely
forbidding other ones). This is necessary to handle how gecko "overdraws"
decorations with clips to create the illusion of continuous lines when they're
actually made out of multiple lines, possibly from different display items
with different lines. Previously gecko *was* handing these clips to
TextDrawTarget to use these clips, but we were just ignoring them.
This is also necessary work to support partial glyphs natively (which apply
rectangular clips to glyphs). Also note that this currently causes a bug
in webrender if combined with zero-blur shadows, but it's not a regression
since we already mishandle clipped decorations. I will work on fixing this
upstream.
2. Changes the intermediate representation of lines from the old webrender
format to a rect-based one. This is in preperation for webrender adopting
that format in a future update.
3. Changes the way wavy lines are processed, correcting some errors in the
old wavy line bindings that lead to them being positioned incorrectly. Also
introduces a wavyLineThickness property that the will be required in a
future webrender update. Wavy lines are unlike any other line, so it's
ultimately desirable to distinguish them.
The net result of these changes is that a companion upstream change (webrender#1923)
will make decoration rendering nearly identical to gecko, and much nicer.
However the clipped shadows issue will need to be seperately resolved before
actually closing this issue.
MozReview-Commit-ID: 6O2wLA6bU3C
--HG--
extra : rebase_source : 98da45bc7f2eaabd63ae226c505cb1580b5c8500
This handles some cases where a nested display item's clip chain
implicitly extends from the wrapper item's clip chain.
MozReview-Commit-ID: DmghxOWi81K
--HG--
extra : rebase_source : 8ec95df64fed247650baf8f5e0c868d1934aa6bc
Instead of just keeping a count of how many "extra clips" (aka
out-of-band clips) we have pushed, track more complex information for
each clip. In particular, track the display item's normal clip chain, as
well as the clip id of the extra clip that was pushed. This will be
needed to override clip cache information in the next patch.
MozReview-Commit-ID: AWKDTkelhyL
--HG--
extra : rebase_source : 379e38550cf45d54862850f6c4aad0ac488f6ca9
By using a variant we can keep a single stack of both clips and
scrollframes, rather than two separate stacks. This is important because
we will want to know how the things are interleaved (e.g. if the last
thing that was pushed was a clip or a scrollframe).
MozReview-Commit-ID: DbhDj2tTq64
--HG--
extra : rebase_source : c591787f31e6ba864178e27197cf6dff42e39a8d
We don't use the code to track the parents of each scroll id, so we can
dump it and just keep a set of scroll ids that we've defined to avoid
redefining them.
MozReview-Commit-ID: HY8y7xt9AJ6
--HG--
extra : rebase_source : 681154ae6494330f74c022243237b50d4921813b
