tree 4e4b2db1dad5465b8721ac788566e1f7c86befeb
parent 7b07e4aae6f55ef77f6c080f7a65f8b3b3e692e0
author Yichi Chen <yichichen@android.com> 1522329714 +0800
committer Yichi Chen <yichichen@google.com> 1536033898 +0000

Add cache validation to ensure the validity

Create cache identity from GL_VERSION and store in ShaderCache.
In the next time ShaderCache is restored from disk, compare the
cache identity to ensure its validity. If GL_VERSION changes in
between, flush out entire FileBlobCache and start from an empty
one.

Bug: b/71800782
Test: Wrote a new unit test to save and restore ShaderCache
Test: hwui_unit_tests
Change-Id: Ie573dc4f18733eee090725be30445d879765231b