tree 4ab90ffd5fa16846db343fa6301d37fc9c637cb6
parent 3002b11fb6691bc7c734ed9e880efb64d63854c7
author shawnlin <shawnlin@google.com> 1586846056 +0800
committer shawnlin <shawnlin@google.com> 1587114866 +0800

Fixed incorrect size and position of a snapshot starting window in
waterfall device.

The dst frame was calculated from scaling the cropped snapshot which
copped out the system decorations(letterboxes, nav bar and sometimes
status bar). But the src frame was set to the original uncropped
snapshot which caused this issue.

Now set the src frame to the cropped snapshot and we could just offset
the dst frame to (0, 0) since we use a matrix to tranlate from a cropped
frame to a scaled cropped frame.

Bug: 151740296
Test: atest TaskSnapshotSurfaceTest
Test: Enable waterfall overlay, launch an app and lock then unlock device
Change-Id: I0ddc8aa480264d2e6d0e59bf4dc9bd09aa3e3041