Bug 260781

Summary:	[Interop 2021][CSS Transforms] css/css-transforms/transform-rotate-003.html and transform-rotate-005.html fail
Product:	WebKit	Reporter:	Matt Woodrow <mattwoodrow>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Matt Woodrow 2023-08-27 20:30:15 PDT

Looks like these only fail on WPT.fyi, not in our infrastructure.

Looks like very very subtle differences due to float/double precision when combining multiple transforms.

Comment 1 Radar WebKit Bug Importer 2023-08-27 20:30:23 PDT

<rdar://problem/114542837>

Comment 2 Matt Woodrow 2023-08-27 20:32:49 PDT

We could potentially use float precision instead of double, which would hopefully cause these to end up identical.

Alternatively, we could use precomputed sin/cos values for 'common' degree values.

We could also just fuzz the tests (more), since the rendering is visually identical.