tree 10a17c943b48f2e5ba4d3c0b6d5983927a1f63b3
parent 5afc4bbba5303d68344df5a3e46c0c9b3f0b9c04
author Nigel Tao <nigeltao@golang.org> 1426723495 +1100
committer Nigel Tao <nigeltao@golang.org> 1426726796 +0000

draw: distinguish YCbCr fast paths by their chroma subsample ratios.

These code paths aren't actually fast yet. That will be a follow-up
change.

Change-Id: I814992573cc6af422e49d0ddf336003e662897a5
Reviewed-on: https://go-review.googlesource.com/7791
Reviewed-by: Rob Pike <r@golang.org>