mtl-rs 0.2.0

Rust bindings for Apple's Metal API
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use objc2::{Encode, Encoding, RefEncode};

/// Options for `set_purgeable_state` call (from `MTLPurgeableState`).
///
/// Availability: macOS 10.11+, iOS 8.0+
#[repr(usize)]
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
pub enum MTLPurgeableState {
    /// The purgeability state is not changed.
    KeepCurrent = 1,
    /// The contents of this resource may not be discarded.
    NonVolatile = 2,
    /// The contents of this resource may be discarded.
    Volatile = 3,
    /// The contents of this resource are discarded.
    Empty = 4,
}

unsafe impl Encode for MTLPurgeableState {
    const ENCODING: Encoding = usize::ENCODING;
}

unsafe impl RefEncode for MTLPurgeableState {
    const ENCODING_REF: Encoding = Encoding::Pointer(&Self::ENCODING);
}