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[Linux] Fix incorrect GL datatypes for uniform locations#188143

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mattkae merged 1 commit into
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robert-ancell:fix-linux-gl-datatypes
Jun 18, 2026
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[Linux] Fix incorrect GL datatypes for uniform locations#188143
mattkae merged 1 commit into
flutter:masterfrom
robert-ancell:fix-linux-gl-datatypes

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glGetUniformLocation() returns a GLint (and -1 when the uniform is not found), but offset_location and scale_location were declared as GLuint. Storing the result in a GLuint would turn -1 into a large positive value, defeating the safe no-op behavior of glUniform2f for invalid locations.

glGetUniformLocation() returns a GLint (and -1 when the uniform is not
found), but offset_location and scale_location were declared as GLuint.
Storing the result in a GLuint would turn -1 into a large positive value,
defeating the safe no-op behavior of glUniform2f for invalid locations.
@robert-ancell robert-ancell requested a review from a team as a code owner June 18, 2026 02:00
@flutter-dashboard flutter-dashboard Bot added the CICD Run CI/CD label Jun 18, 2026
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It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

@github-actions github-actions Bot added engine flutter/engine related. See also e: labels. platform-linux Building on or for Linux specifically a: desktop Running on desktop team-linux Owned by the Linux platform team labels Jun 18, 2026

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Code Review

This pull request changes the types of offset_location and scale_location from GLuint to GLint in fl_compositor_opengl.cc. There are no review comments, and I have no feedback to provide.

@mattkae mattkae added this pull request to the merge queue Jun 18, 2026
Merged via the queue into flutter:master with commit c8081e2 Jun 18, 2026
200 of 201 checks passed
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Jun 18, 2026
flutter/flutter@b10d0f1...15963bc

2026-06-18 engine-flutter-autoroll@skia.org Roll Skia from 6e84902d56c3 to 1ae2466c9ea5 (4 revisions) (flutter/flutter#188172)
2026-06-18 engine-flutter-autoroll@skia.org Roll Packages from 6ce00a8 to 4fd05e6 (3 revisions) (flutter/flutter#188171)
2026-06-18 robert.ancell@canonical.com [Linux] Fix vertical offset in composite_layer (flutter/flutter#188145)
2026-06-18 robert.ancell@canonical.com [Linux] Fix incorrect GL datatypes for uniform locations (flutter/flutter#188143)
2026-06-18 engine-flutter-autoroll@skia.org Roll Dart SDK from e05c69222ea4 to 5883736e7670 (2 revisions) (flutter/flutter#188168)
2026-06-18 engine-flutter-autoroll@skia.org Roll Skia from 046277850e8d to 6e84902d56c3 (5 revisions) (flutter/flutter#188165)
2026-06-18 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from or21OEdGtairm6nl9... to 1E2qOlNnC2Ucn-1oV... (flutter/flutter#188162)
2026-06-18 engine-flutter-autoroll@skia.org Roll Skia from 8dd207d443d3 to 046277850e8d (1 revision) (flutter/flutter#188153)
2026-06-18 31859944+LongCatIsLooong@users.noreply.github.com Add entitlements.txt entries for new dart sdk binaries (flutter/flutter#188133)
2026-06-18 engine-flutter-autoroll@skia.org Roll Dart SDK from b670723c5f07 to e05c69222ea4 (1 revision) (flutter/flutter#188146)
2026-06-18 robert.ancell@canonical.com Fix bounds checking in FlAccessibleTextField (flutter/flutter#188137)
2026-06-18 engine-flutter-autoroll@skia.org Roll Skia from f5a2921fe23e to 8dd207d443d3 (2 revisions) (flutter/flutter#188141)
2026-06-18 30870216+gaaclarke@users.noreply.github.com Adds tests for disabling macos impeller (flutter/flutter#188132)
2026-06-17 jlemanski1@gmail.com Improve Flutter Web accessibility: update flt meta viewport tag to align with WCAG 2 guidelines (flutter/flutter#182047)
2026-06-17 engine-flutter-autoroll@skia.org Roll Dart SDK from e39bde5b1bfc to b670723c5f07 (2 revisions) (flutter/flutter#188130)
2026-06-17 engine-flutter-autoroll@skia.org Roll Skia from 066bfbac7282 to f5a2921fe23e (1 revision) (flutter/flutter#188128)
2026-06-17 matt.boetger@gmail.com Support --trace-systrace in release builds on Android (flutter/flutter#186359)
2026-06-17 matt.boetger@gmail.com Isolate compiled dill caches by TargetModel (flutter/flutter#187253)
2026-06-17 98614782+auto-submit[bot]@users.noreply.github.com Reverts "refactor(web): Unify Image on Skwasm and CanvasKit (#187873)" (flutter/flutter#188124)
2026-06-17 matt.kosarek@canonical.com Use a mock EGL manager in windows unittests to avoid flaky rendering calls (flutter/flutter#188078)
2026-06-17 matt.boetger@gmail.com [Android] Remove support for unused manifest flags (flutter/flutter#186021)
2026-06-17 30870216+gaaclarke@users.noreply.github.com Adds windows project switch for enabling impeller (flutter/flutter#188044)
2026-06-17 15619084+vashworth@users.noreply.github.com Skip prefetch SwiftPM dependencies if the project hasn't been migrated to SwiftPM yet (flutter/flutter#187206)
2026-06-17 nshahan@google.com [flutter_tools] Bump dwds to 27.1.2 (flutter/flutter#187951)
2026-06-17 30870216+gaaclarke@users.noreply.github.com Adds external texture devicelab test for windows impeller (flutter/flutter#187886)
2026-06-17 engine-flutter-autoroll@skia.org Roll Skia from 5d19002eb73e to 066bfbac7282 (2 revisions) (flutter/flutter#188118)
2026-06-17 34871572+gmackall@users.noreply.github.com Add note about magnifier issue when using transparent HCPP pv (flutter/flutter#187753)
2026-06-17 30870216+gaaclarke@users.noreply.github.com [linux]: fixes crash when resizing windows (flutter/flutter#187626)
2026-06-17 56400880+adilburaksen@users.noreply.github.com [flutter_tools] Enforce that package-declared asset paths stay within the package (flutter/flutter#187661)
2026-06-17 jason-simmons@users.noreply.github.com Remove canvaskit_cipd_instance from DEPS (flutter/flutter#188073)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages
Please CC bmparr@google.com,stuartmorgan@google.com on the revert to ensure that a human
is aware of the problem.

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LouiseHsu pushed a commit to LouiseHsu/flutter that referenced this pull request Jun 18, 2026
)

glGetUniformLocation() returns a GLint (and -1 when the uniform is not
found), but offset_location and scale_location were declared as GLuint.
Storing the result in a GLuint would turn -1 into a large positive
value, defeating the safe no-op behavior of glUniform2f for invalid
locations.
via-guy pushed a commit to via-guy/flutter that referenced this pull request Jun 26, 2026
)

glGetUniformLocation() returns a GLint (and -1 when the uniform is not
found), but offset_location and scale_location were declared as GLuint.
Storing the result in a GLuint would turn -1 into a large positive
value, defeating the safe no-op behavior of glUniform2f for invalid
locations.
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