[Webkit-unassigned] [Bug 94746] New: decide what (and how) we should set the tolerance for ref test pixel compares and test for that

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=94746

           Summary: decide what (and how) we should set the tolerance for
                    ref test pixel compares and test for that
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: NRWT
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dpranke at chromium.org
                CC: eric at webkit.org, tony at chromium.org, abarth at webkit.org,
                    simon.fraser at apple.com, ojan at chromium.org,
                    zandobersek at gmail.com, rniwa at webkit.org


See comments in https://bugs.webkit.org/show_bug.cgi?id=94704 for background ... it's perhaps not clear if we should use the default tolerance the port specifies for pixel tests also for ref tests, or if ref tests should always require an exact match (tolerance == 0 or just hash compares), or if we should have a separate default-tolerance-for-ref-tests parameter.

Once we agree on this, we should make sure this is implemented and write a test to check the behavior (we don't have a test today).

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