Re: [dev-servo] reftests vs testing display lists

2015-10-27 Thread Nicolas Silva
I'll add that without fuzzing, it would very hard for us to do things like switch from a Moz2D backend to another or change the way we do drawing (like enabling tiling), because these things mean some rounding happens in slightly different ways and anti-aliasing is particularly sensitive to this. F

[dev-servo] reftests vs testing display lists

2015-10-26 Thread Robert O'Callahan
Many Webkit layout tests use DRT (DumpRenderTree), which dumps the layout object tree and compares against reference text files. These became difficult to maintain as the layout engine evolved and such tests are not portable to any other engine. Testing display list dumps sounds like it would have