tree 5e4e7e0e5045af26ebf82a07bdd9d7a0d47ee8df
parent 4625758d0b909ccfc9f40b707666b1b21e9e8ffd
author Mike Reed <reed@google.com> 1254940685 -0700
committer Mike Reed <reed@google.com> 1254940685 -0700

add (hidden) setHasAlpha() to allow clients like the view's cache to hint that a bitmap is opaque.

Knowing that a 32bit bitmap is opaque is a performance boost for some blits.