Commits on Jan 22, 2020

1. Bug 1610626 - Fix wrench reftest mode incorrectly printing unexpected… …

   … in some cases. r=Bert
   
   The semantics of the inaccuracy reftest mode are that the overall
   test succeeds as long as one of the multiple test images mismatches
   the reference image.
   
   However, the previous implementation would print an unexpected result
   if any of the comparisons were equal (even though the overall test
   result would be reported correctly).
   
   This patch changes wrench so that it only reports an unexpected
   failure for the overall test, not each individual reference.
   
   Differential Revision: https://phabricator.services.mozilla.com/D60564
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/3d076ae68a9411e4f412c90d2743987f7b916850

   

   gw3583 authored and moz-gfx committed Jan 22, 2020
   ac786a5

2. Bug 1608741 - Part 2 - Disable dithering on gradient primitives. r=so… …

   …taro,nical
   
   There are a number of issues with the current gradient dithering
   implementation, that cause many test failures and also fuzziness
   rendering when enabling DirectComposition virtual surfaces. In
   particular, the dither result is dependent on the offset of the
   update rect within a render target.
   
   For now, this patch disables gradient dithering by default. This
   gives us:
   
    - A heap of new test PASS results (or reduced fuzziness).
    - Fixes a number of non-deterministic fuzziness bugs with DC.
    - Improves performance of gradient rendering by a reasonable amount.
   
   We can fix gradient dithering as a follow up, and re-enable if/when
   we find content that would benefit from it significantly (we may
   be able to improve gradients in other ways than dithering too).
   
   Differential Revision: https://phabricator.services.mozilla.com/D60460
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/f758f235dd70f1060dba771ccfd3cb91a9aaef20

   

   gw3583 authored and moz-gfx committed Jan 22, 2020

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