[webkit-dev] "No red pixels below" automation

[Konstantin Tokarev]

Hello,

There is a number of layout tests which are expected not to have red pixels in case of pass. Some of them are purely pixel tests, which are not checked by bots (and not often by humans), others have render trees dumps, but there many cases when render tree dump is right but end result is not because of painting bug, and it's also easy to overlook one-pixel errors when doing rebaseline.

Was it ever considered to do automatic red pixel search in png result? Such tests could be run on bots and increase regular coverage.

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Regards,
Konstantin