tree 89289d543069ef615e1a58343b8db1b93356fcc5
parent 7b9ef735a8d1fddf3887853abbd065271fa9c293
author Russ Cox <rsc@swtch.com> 1353897712 -0500
committer Russ Cox <rsc@swtch.com> 1353897712 -0500
golang-hg 09b6157462546137925086e677d9606c3d9513a1

devdraw, libdraw: add display->dpi

Fixed at 100 right now, but the plan is to make it accurate
and then use it.

R=rsc
http://codereview.appspot.com/6856091