tree bf768c4cca326ac4a6ec2963963527a4a69994b3
parent ff7737beb5b5145291f39461d1bcf48dfc62aafb
author Chip Davis <cdavis@codeweavers.com> 1612147652 -0600
committer Chip Davis <cdavis@codeweavers.com> 1612197689 -0600

MVKCommandEncoder: Use the temp buffer mechanism for visibility buffers.

Add support for "dedicated" temp buffers, where instead of allocating a
big buffer and carving regions out of it, a unique buffer is returned
for each allocation request. This is necessary for visibility buffers,
because the offset passed to `-[MTLRenderCommandEncoder
setVisibilityResultMode:offset:]` cannot exceed an
implementation-defined value, currently 256k less 8 bytes for Mac family
2 on Catalina and up, and on Apple family 7; and 64k less 8 bytes
otherwise.