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Apply a basis change on the perspective transform. #3173

Merged
merged 1 commit into from Oct 5, 2018
Merged

Apply a basis change on the perspective transform. #3173

merged 1 commit into from Oct 5, 2018
+6 −1

Commits on Oct 5, 2018

  1. Apply a basis change on the perspective transform. 

    When applying async scrolling transforms, the perspective matrix also
needs to be adjusted with a basis change. This is a version of #3154
that doesn't break async scrolling on 2D-transformed elements. Although
this passes the required test cases and displays correct behaviour,
the intuition behind why this works is not really clear to me; see
https://bugzilla.mozilla.org/show_bug.cgi?id=1415272#c23 onwards for
some discussion.
    @staktrace
    staktrace committed Oct 5, 2018
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