Only call glCheckFrameBufferStatus in the render pass in debug builds (#178707) Rendering to an offscreen texture on platforms without implicit MSAA resolve causes the creation of a framebuffer each frame and a subsequent call to glCheckFramebufferStatus. This call can cause a full [GPU round trip] (https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/WebGL_best_practices#avoid_blocking_api_calls_in_production). This change creates a function in the proc table that only actually makes the glCheckFramebufferStatus check in debug builds, and changes the calls in render_pass_gles to use this function instead. An alternate way of doing this would be to directly wrap the callsites with `ifdef` checks, but this way was more easily testable and seemed cleaner. Also removes a redundant call to CheckFramebufferStatus. Fixes https://github.com/flutter/flutter/issues/175522 ## 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. https://dart.googlesource.com/external/github.com/flutter/flutter/+/664da1fe8ff91f5dd81c2039e8c1868ca8615768
Monorepo is:
With depot_tools installed and on your path, create a directory for your monorepo checkout and run these commands to create a gclient solution in that directory:
mkdir monorepo cd monorepo gclient config --unmanaged https://dart.googlesource.com/monorepo gclient sync -D
This gives you a checkout in the monorepo directory that contains:
monorepo/ DEPS - the DEPS used for this gclient checkout commits.json - the pinned commits for Dart, flutter/engine, and flutter/flutter tools/ - scripts used to create monorepo DEPS engine/src/ - the flutter/buildroot repo flutter/ - the flutter/engine repo out/ - the build directory, where Flutter engine builds are created third_party/ - Flutter dependencies checked out by DEPS dart/ - the Dart SDK checkout. third_party - Dart dependencies, also used by Flutter flutter/ - the flutter/flutter repo
Flutter's instructions for building the engine are at Compiling the engine
They can be followed closely, with a few changes:
goma_ctl ensure_start is sufficient.Example build commands that work on linux:
MONOREPO_PATH=$PWD if [[ ! $PATH =~ (^|:)$MONOREPO_PATH/flutter/bin(:|$) ]]; then PATH=$MONOREPO_PATH/flutter/bin:$PATH fi export GOMA_DIR=$(dirname $(command -v gclient))/.cipd_bin goma_ctl ensure_start pushd engine/src flutter/tools/gn --goma --no-prebuilt-dart-sdk --unoptimized --full-dart-sdk autoninja -C out/host_debug_unopt popd
The Flutter commands used to build and run apps will use the locally built Flutter engine and Dart SDK, instead of the one downloaded by the Flutter tool, if the --local-engine option is provided.
For example, to build and run the Flutter spinning square sample on the web platform,
MONOREPO_PATH=$PWD cd flutter/examples/layers flutter --local-engine=host_debug_unopt \ -d chrome run widgets/spinning_square.dart cd $MONOREPO_PATH
To build for desktop, specify the desktop platform device in flutter run as -d macos or -d linux or -d windows. You may also need to run the command
flutter create --platforms=windows,macos,linux
on existing apps, such as sample apps. New apps created with flutter create already include these support files. Details of desktop support are at Desktop Support for Flutter
Tests in the Flutter source tree can be run with the flutter test command, run in the directory of a package containing tests. For example:
MONOREPO_PATH=$PWD cd flutter/packages/flutter flutter test --local-engine=host_debug_unopt cd $MONOREPO_PATH
Please file an issue or email the dart-engprod team with any problems with or questions about using monorepo.
We will update this documentation to address them.
flutter commands may download the engine and Dart SDK files for the configured channel, even though they will be using the local engine and its SDK.gclient sync needs to be run in an administrator session, because some installed dependencies create symlinks.