commit 5bd97720a8720a8eae9bb90e88e8487de6e542d6
author Jim Van Verth <jvanverth@google.com> Wed Jul 28 10:57:27 2021 -0400
committer Jim Van Verth <jvanverth@google.com> Wed Jul 28 16:40:34 2021 +0000
tree beb82c2f86074be977374935b6c820a61651f9e2
parent 3a21d497bddb26c3678b596d1ea7e30ae23fa80d

Metal: use staging buffer for updating non-dynamic buffers

For non-dynamic (i.e. GPU-resident) buffers, onUpdateData() uses a
staging buffer rather than map() and unmap(). In addition, map() and
unmap() do nothing for non-dynamic buffers.

Also removes fOffset member, as it was never anything but 0.

Change-Id: I8bcd36c10c14d21395693686696462cca79a0e70
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/433678
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>