Sebastian Dröge 172d14acef cairooverlay: Optimize premultiplication/unpremultiplication loops
Pull in video frame fields into local variables. Without this the
compiler must assume that they could've changed on every use and read
them from memory again.

This reduces the inner loop from 6 memory reads per pixels to 4, and the
number of writes stays at 3.
2018-12-07 17:22:39 +00:00
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