tree 5f3fa692db5df2f5a3b3f9b67f8c3db4a5f8464d
parent 65a798f031fd31a65574938bed2ec44c2bcba496
author Nigel Tao <nigeltao@golang.org> 1428490033 +1000
committer Nigel Tao <nigeltao@golang.org> 1428532713 +0000

draw: substitute Src for Over when the source image is completely opaque.

The two Ops are equivalent, but Src is faster.

Change-Id: I2c73a13755047c224c71fb5af786875f02681de9
Reviewed-on: https://go-review.googlesource.com/8640
Reviewed-by: Rob Pike <r@golang.org>