tree 3301dc5a6419d41eb0d57453117b610bf6e12805
parent 1655f3b4558cc565aed7430554b7d0af59ca4733
author Bill Hollings <bill.hollings@brenwill.com> 1619892017 -0400
committer Bill Hollings <bill.hollings@brenwill.com> 1619892017 -0400

Fix build error when querying MTLDevice support for BC compression.

This build error seems to have been exposed in Xcode 12.5.
Add mvkSupportsBCTextureCompression() to manage use of
[MTLDevice supportsBCTextureCompression] to query for
MTLDevice support for BC compression across all platforms.