With this minor addition to the DlCanvas/DisplayList API the code in the paragraph builder no longer needs to worry about PathEffect objects and their varying support on the backends.
At this point all PathEffect code in the engine is obsolete and can be deleted, but I'll leave that for a follow-on PR.
The only PathEffect related thing I did delete was support for rendering primitives with a PathEffect in the DL Rendering tests, both because it is a vestigial attribute and also because it would interfere with the new DrawDashedLine rendering test (a PathEffect on top of a PathEffect...).
Part of https://github.com/flutter/flutter/issues/142054
Moves all of the drawVertices tests for aiks and entities into DL. This might change some of the entity goldens but ... these are easy to eyeball so it should be fine IMO.
Part of https://github.com/flutter/flutter/issues/142054
Moves all of the drawAtlas tests for aiks and entities into DL. This might change some of the entity goldens but ... these are easy to eyeball so it should be fine IMO.
Migrate almost all of the gradient unittests to display list. Removes tests for disabled dithering and the dithering flag, as it has not been possible to disable dithering on gradients for months and months.
Part of https://github.com/flutter/flutter/issues/142054
The MatrixClipTracker was nothing more than a vector of MatrixClipState objects and a whole lot of duplicate delegation methods. It provided little value since nearly every use of it already had a state stack that was kept in synch with it's internal stack and so it was just adding an extra layer of delegation and extra allocations.
Create a fast gradient variant that assumes vertex interpolation is sufficient to compute the gradient color. This follows the approximate design from https://github.com/flutter/flutter/issues/148651
This is only implemented for draws that are exactly horizontal or vertical gradients on a rectangle with an identity effect transform. This could be easily extended to all horizontal or vertical gradients by extending the drawGeometry call to make the cover rect customizable. Handling diagonal gradients and effect transforms is more work but feasible.
this is sufficient to make https://github.com/flutter/flutter/issues/148496 about 2x as fast, at least for me. Applications with different gradients will not yet benefit.
The DisplayListBuilder now tracks the blend mode(s) used for its contents and whether it contains a child SaveLayer that uses a backdrop filter - both conditions that could require the graphics engine to use a different type of layer to satisfy the requests.
blend modes are tracked as the "highest" blend mode enum used by any content (defaults to kClear) as the enum values tend to be ordered so that larger values will tend to require more complicated render-target accesses.
The root layer of the DisplayList can be queried for both conditions on the root layer using methods on the DisplayList class.
Reverts: flutter/engine#53099
Initiated by: jonahwilliams
Reason for reverting: manifest opt out doens't work.
Original PR Author: jonahwilliams
Reviewed By: {bdero, zanderso, chinmaygarde}
This change reverts the following previous change:
All plugin migrations have landed. Enable impeller by default on Android.
Add `SemanticsAction.focus`. This PR just adds the new enum value without any logic. Adding the enum value first to unblock work that needs to be done on both the engine and framework side that will actually implement all the necessary logic.
This is PR 1 out of ~3 for https://github.com/flutter/flutter/issues/83809
Revert label failed due to conflicts
`FlutterFragmentTest.java` was the only file that had merge issues, everything else is the output of `git revert 802e5d2cd3c9e73f336e3fe43487b64a5fdf98d8`
[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
We can set the minimum stroke width to 0.5 to guarantee at least one hit of 4x MSAA coverage. This doesn't fix stroke fidelity issues but it does make it a bit better.
https://github.com/flutter/flutter/issues/144313
Upgrades every `androidx` dependency in the `src/third_party/android_embedding_dependencies` bundle to the latest version, except the `lifecycle` group*. Tested running a couple of apps as well because when updating these dependencies in the past I've been able to build the engine but then flutter run fail when trying to run an app.
Fixes https://github.com/flutter/flutter/issues/129307, also unblocks a feature that will eventually be needed for Scribe.
[*]`2.8.0` is the latest there, but I ran into an issue with dexing when I tried to upgrade, due to b/336164417, an AGP bug that had its fix backported to all >`8.0.0` versions, but we still support less than that so we will have to wait on that upgrade.
[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
Multiple fixes to text rendering that match skia behavior on almost all bugs I've found, except for the glyphs are still _slightly_ too fine for some CJK text. The fixes are:
1. Compute the gylph size in the typographer context, using text size * scale factor text, instead of computing smaller bounds and scaling it up. This was not accurate and as a result we would positon glyphs incorrect by multiple pixels sometimes, causing uneven rows.
2. Match Skia's rounding behavior. previously we were rounding in multiple places, Skia rounds once. This is important to prevent jumping.
3. Use 4 subpixel X positions for rendering. This is the big one that ensures the visible layout matches exactly. Adds support for Y, both, and none positioning too. I couldn't find any examples of just Y or both. Some fonts may specify that have no subpixel positioning. So we don't bother to compute it for those.
Fixes https://github.com/flutter/flutter/issues/138386 / mostly, except slightly not bold enough.
Fixes https://github.com/flutter/flutter/issues/147577 / mostly, except slightly not bold enough.
Fixes https://github.com/flutter/flutter/issues/140475
Fixes https://github.com/flutter/flutter/issues/141467
Fixes https://github.com/flutter/flutter/issues/135523
Fixes https://github.com/flutter/flutter/issues/127815
Introduces a sentinel value `kTextHeightNone` for `ui.TextStyle.height` which can be used to "unset" the current `TextStyle.height` (and for consistency, it applies to `StructStyle.height` and `ParagraphStyle.height` too). Documentation of `TextStyle.height` can be found [here](https://main-api.flutter.dev/flutter/painting/TextStyle/height.html) (the one from `painting` library not `dart:ui`).
part of https://github.com/flutter/flutter/issues/58765: currently `TextStyle.height` uses `null` as the sentinel value for "no height multiplier specified, use the font height", which has conflicting semantics: it means the height multiplier is not set (so the span height is determined by font metrics) but in reality it also means the height should inherit from its parent span (or in `copyWith` context, it means do not override the height).
The new sentinel value `kTextHeightNone` is currently set to `0.0`. This is because skparagraph internally uses 0 for "no height multiplier", so using 0 should minimize the behavior change:
62f369c759/modules/skparagraph/src/Run.cpp (L65-L67)
This MAY still change the current behavior: for consistency setting `StructStyle.height` / `ParagraphStyle.height` to the sentinel value also unsets the height multiplier which may not be the current behavior.
[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
Resolves https://github.com/flutter/flutter/issues/134748.
This was a really fun experiment. I learned a lot from it, and it
genuinely helped me solve some coverage-related problems, but the
reality is it was too little too late -- by the time we had this
capture system, we had already solved most of the problems that would
have benefitted from this.
It's been a few months since I've used or extended the capabilities of
this capture system for something, and I don't have the spare
time/energy to give it the love it needs to realize the vision I had
for it. I still almost exclusively use a combination of native frame
captures and print debugging to solve problems.
RIP in peace.
This reverts commit 104eb98e62. (https://github.com/flutter/engine/pull/52680)
The snapshot's transform is provided to the pipeline. If the vertices are based on the coverage rectangle, then that will apply the snapshot's transform twice.
Fixes https://github.com/flutter/flutter/issues/148213
This PR changes from using a different GN pool for each non-compiler tool, to using one GN pool for everything.
Additionally, since we are no longer linking remotely in any configuration, this PR uses the pool for linking.
ObjC and impellerc tasks also do not (yet) run on RBE, so they are also now governed by the pool.
Needs https://github.com/flutter/buildroot/pull/856
I found this while migrating `FlutterPlatformViews_Internal.mm` to ARC https://github.com/flutter/engine/pull/52535. I'll land this first.
```objc
if (_backdropFilterView != visualEffectView) {
_backdropFilterView = [visualEffectView retain];
}
```
should instead be something like:
```objc
if (_backdropFilterView != visualEffectView) {
id oldBackdropFilterView = _backdropFilterView;
_backdropFilterView = [visualEffectView retain];
[oldBackdropFilterView release];
}
```
But that's already what the built-in MRC `nonatomic, retain` property setter does, so use that instead.
Added a test that passes on this PR and fails on main.
