tree 849785e6feaedf5d11d735cdf202a3ebdfe6623a
parent 5fe9683216954a4b94b554431caab310d8f25795
author Nigel Tao <nigeltao@golang.org> 1426757107 +1100
committer Nigel Tao <nigeltao@golang.org> 1426798806 +0000

draw: add a fast path for NRGBA src images.

benchmark                      old ns/op      new ns/op      delta
BenchmarkScaleSrcNRGBA         14142583       2043782        -85.55%
BenchmarkTformABSrcNRGBA       9846421        1993564        -79.75%
BenchmarkTformCRSrcNRGBA       62041569       13866457       -77.65%

Change-Id: I1edf699dfc6436c0da7e3ab221684406ab1e362f
Reviewed-on: https://go-review.googlesource.com/7793
Reviewed-by: Rob Pike <r@golang.org>