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| author | Markus Stange <mstange@themasta.com> | 2019-09-04 12:00:52 +0200 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-09-04 12:13:10 +0200 |
| commit | 7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e (patch) | |
| tree | 93ea636f49aab55dc7b912c64b5cf8c41103f625 /layout/reftests/bugs/618071.html | |
| parent | 69ac6335874875b3dd14a391e5ddcd73ad60f23d (diff) | |
| download | UXP-7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e.tar UXP-7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e.tar.gz UXP-7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e.tar.lz UXP-7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e.tar.xz UXP-7c09f0ed7e3bbc2f4da4df7496478594b4f0fa0e.zip | |
Correctly return zero vertices if clipping plane 0 or 2 clip away the
entire polygon.
This fixes a bug that was introduced three years ago in BZ bug 1268854.
What happened was that the final pass over the polygon assumed that the
current polygon was living in plane[0]. But due to the double buffering,
the "current" polygon alternates between plane[0] and plane[1].
The bug had also introduced an early exit so that we could hit the final
pass at a time where the current, now empty, polygon was in plane[1]. So
we would incorrectly treat all 32 points in plane[0] as part of the
final polygon.
This bug was responsible for intermittently unreasonable numbers in
CompositorOGL's fill rate / overdraw overlay.
This fixes a regression caused by the fix for CVE-2016-5252.
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