Use shared mode for Metal texture upload buffers.
On Mac, originally the temporary upload buffer was stored in managed
memory, which will generate two copy actions, one from the CPU side to
the GPU side of the managed buffer, then another from the GPU side of
the buffer to the GPU texure. Shared mode buffers are in PCI-accessible
system memory, so by storing the temporary texture data there, we should
be copying from the CPU buffer directly to the GPU texture. This gives
us another 10-15% perf improvement over the old upload code.
Change-Id: Ia675e7130e0ae7d0c5f16c8170eeef60a69bfbbd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230299
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
3 files changed