Closed Bug 1293693 Opened 5 years ago Closed 5 years ago
canvas should not skip the copy-on-write if the composite op is OP
_DEST _OUT .
On the other hand it is safe to skip the copy if the composite op is SOURCE.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/mozilla-inbound/rev/91628f5a38c6 FillRect covering the entire canvas can skip copying the previous frame if the composite op is SOURCE, but not DEST_OUT. r=ethlin
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