commit 0b91815c1d06a3bfed990599b0ac4a9e36e6b71d
author Nigel Tao <nigeltao@golang.org> Fri Jul 31 16:31:30 2015 +1000
committer Nigel Tao <nigeltao@golang.org> Tue Aug 04 00:33:53 2015 +0000
tree daeffe336c11d0f3b446dd94b45603a9725d2610
parent d913a7f2ed5b826498999c3084457dfca748c49a

shiny/driver/internal/swizzle: new package.

On my amd64 desktop machine:
BenchmarkBGRA-8      	    3000	    469214 ns/op
BenchmarkPureGoBGRA-8	     500	   3267103 ns/op

When swizzling a 1920x1080 RGBA pixel buffer, there's a 7x difference
between 3.27ms and 0.47ms, and that 3-ish milliseconds difference is a
noticable fraction of the 16.67ms that a 60Hz refresh rate gives you.

Thanks to Aaron Jacobs for his help with SIMD assembly.

Change-Id: I8c1a50cc3f038824e07442492f8f0f6b22c83728
Reviewed-on: https://go-review.googlesource.com/13003
Reviewed-by: David Crawshaw <crawshaw@golang.org>