When there is glBufferData API call, if the current
VkBuffer is in use, we copy to a staging buffer to
be gpu copied later. Instead of doing this second copy,
write directly to a new buffer that will be used for
subsequent gpu operations.
BufferVk now has a DynamicBuffer to handle
the logic of acquiring a new/free buffer to be used.
Bug: angleproject:4380
Change-Id: I207f334013ae944090eb48c26c692a09e8815f74
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2040513Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
