A Boolean value that determines whether the drawable’s textures are used only for rendering.
- iOS 9.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- tvOS 9.0+
If the value is
YES (the default), the underlying
CAMetal object allocates its textures with only the
MTLTexture usage flag. Core Animation can then optimize the textures 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 the textures, but at a cost to performance.