Source code
Revision control
Copy as Markdown
Other Tools
#![allow(unused_imports)]
#![allow(clippy::missing_safety_doc)]
use core::ptr::NonNull;
use crate::*;
#[allow(dead_code)]
fn slice_to_ptr_count<T>(slice: &[T]) -> (NonNull<T>, usize) {
let ptr: *const T = slice.as_ptr();
let ptr: *mut T = ptr as *mut T;
// SAFETY: Slice pointers are always non-null
let ptr = unsafe { NonNull::new_unchecked(ptr) };
(ptr, slice.len())
}
#[cfg(all(feature = "MTLRenderCommandEncoder", feature = "MTLCommandEncoder"))]
pub trait MTLRenderCommandEncoderSliceExt: MTLRenderCommandEncoder + objc2::Message {
// TODO: Safety
unsafe fn setViewports(&self, viewports: &[MTLViewport]);
}
#[cfg(all(feature = "MTLRenderCommandEncoder", feature = "MTLCommandEncoder"))]
impl<P: MTLRenderCommandEncoder + objc2::Message> MTLRenderCommandEncoderSliceExt for P {
unsafe fn setViewports(&self, viewports: &[MTLViewport]) {
let (ptr, count) = slice_to_ptr_count(viewports);
unsafe { self.setViewports_count(ptr, count) }
}
}
// TODO: Many more methods take `(NonNull<Foo>, NSUInteger)` that can be
// turned into `&[Foo]`.