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LouiseHsu b683af0cec
Engine Support for Dynamic View Resizing (#173610) 
Part of https://github.com/flutter/flutter/issues/169147 (iOS) and
https://github.com/flutter/flutter/issues/149033 (Android).
Implementation PRs coming up!

This enables support for dynamic view resizing in non-web embedders.
While this PR enables support, it does not _implement_ support.

Specifically, this creates the pipes (in viewport metrics) for min/max
width/height constraints that tell the engine and framework that when
rendering the frame it should adjust the width/height as needed for the
content. The engine should also discard layer trees that do not fit the
constraints.

Since the engine now relies on BoxConstraints, geometry.h has now been
moved out of embedder specific codepath so that both embedder and engine
can depend on it.

Related PRs:
`dart:ui`: https://github.com/flutter/engine/pull/48090
`framework`: https://github.com/flutter/flutter/pull/138648
`framework reland`: https://github.com/flutter/flutter/pull/140918
`Web`: https://github.com/flutter/engine/pull/50271

## Pre-launch Checklist
- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

---------

Co-authored-by: Matt Boetger <boetger@google.com>
Co-authored-by: Matt Boetger <matt.boetger@gmail.com>
2025-09-18 16:16:24 +00:00
..
scripts
…
src
Engine Support for Dynamic View Resizing (#173610)
2025-09-18 16:16:24 +00:00
README.md
chore: move engine docs out of engine/ and into docs/ (#175195)
2025-09-16 18:19:50 +00:00

README.md

Flutter Engine

Setting up the Engine development environment

See here

gclient bootstrap

Flutter engine uses gclient to manage dependencies.

If you've already cloned the flutter repository:

  1. Copy one of the engine/scripts/*.gclient to the root folder as .gclient:
    1. Googlers: copy rbe.gclient to enable faster builds with RBE
    2. Everyone else: copy standard.gclient
  2. run gclient sync from the root folder