tree bf6aa493f56501bac39bda5c41e2a4fad7b11a73
parent 57e7cea706d4e61c1423f0516bfc223c9d51e052
author Nicolas Capens <capn@google.com> 1513179722 -0500
committer Nicolas Capens <nicolascapens@google.com> 1513265996 +0000

Fix blitting of quad layout data.

The stencil buffer always has a quad layout, and can't be copied using
copyBuffer() even when copying the full buffer, because it copies one
row at a time (i.e. it assumes a linear layout).

Likewise a depth buffer may optionally have a quad layout and copying
the full buffer still doesn't allow using copyBuffer().

To keep maximum performance for the typical case of copying between
equally sized buffers, a new code path it added to copy the entire
slice in one memcpy() call.

Change-Id: I77f60f66e5cdcd7cf0a73d03f3d3485809d7ebe6
Reviewed-on: https://swiftshader-review.googlesource.com/15008
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>