Fails of "test-render debug/raster" and "test-render debug/tile"

[davychxn]

Hi,

The following tests basically fail on fonts drawing:

1. test-render debug/raster
2. test-render debug/tile

Take "test-render debug/raster" as an example:
Actual:

Expected:

Diff:

The fonts are drawn by code here:
"https://github.com/maplibre/maplibre-gl-js/blob/main/src/render/draw_debug.ts"

Form history, above code wasn't changed big.

On May of 2022 exact the 2 tests were updated once:

At that time the tests should still passed.

At that time "gl" (headless-gl) package was still at version 5.0.0

I did following tests:
1, I reverted this history change: cfbc39f

Manually replace "gl" to version 5.0.0
Built and run the tests, still fail.

2, Downloaded "dist" folder of "https://github.com/maplibre/maplibre-gl-js/releases/tag/v2.2.0-pre.1".
Which was released on May 12, 2022. Run the tests, still fail.

Since the fonts are rendered using Canvas calls, I think the fonts rendering result's difference is caused by "head-less".

Can I just update the "expected.png" to latest? Or any suggestion for further investigation?

Thanks.

[HarelM]

There are two options here:

1. Update the expected.png to pass for you and for the CI - preferred
2. If 1 isn't possible you can add another expected.png inn that folder, the tests will try to find the expected with the lowest diff.