A Boolean value that determines whether the drawable can be used for texture sampling or read/write operations.
- iOS 9.0+
- macOS 10.11+
- tvOS 9.0+
If the value is
YES (the default), the underlying
CAMetal object allocates its
MTLTexture objects in ways that are optimized for display purposes. However, you may not sample, read from, or write to those textures. If the value is
NO, you can sample or perform read/write operations on its textures (at a cost to performance).