tree b65a1816c11e13fff30551559214f6fef5a82a13
parent e83a2376afa22df10d8d246752a186f0fedc77f7
author Nigel Tao <nigeltao@golang.org> 1428992616 +1000
committer Nigel Tao <nigeltao@golang.org> 1429143649 +0000

draw: add mask fields to Options.

This change only adds the fields, more or less. Follow-up changes will
actually honor the masks.

Change-Id: I81411dc1aac4b3c846dcdf13e2cb0b5cd60fb2b4
Reviewed-on: https://go-review.googlesource.com/8902
Reviewed-by: Rob Pike <r@golang.org>