1use std::convert::TryInto;
2#[cfg(feature = "debug")]
3use std::fmt;
4use std::mem;
5
6use crate::vk;
7pub type VkResult<T> = Result<T, vk::Result>;
8
9impl vk::Result {
10 #[inline]
11 pub fn result(self) -> VkResult<()> {
12 self.result_with_success(())
13 }
14
15 #[inline]
16 pub fn result_with_success<T>(self, v: T) -> VkResult<T> {
17 match self {
18 Self::SUCCESS => Ok(v),
19 _ => Err(self),
20 }
21 }
22
23 #[inline]
24 pub unsafe fn assume_init_on_success<T>(self, v: mem::MaybeUninit<T>) -> VkResult<T> {
25 self.result().map(move |()| v.assume_init())
26 }
27}
28
29pub(crate) unsafe fn read_into_uninitialized_vector<N: Copy + Default + TryInto<usize>, T>(
38 f: impl Fn(&mut N, *mut T) -> vk::Result,
39) -> VkResult<Vec<T>>
40where
41 <N as TryInto<usize>>::Error: std::fmt::Debug,
42{
43 loop {
44 let mut count = N::default();
45 f(&mut count, std::ptr::null_mut()).result()?;
46 let mut data =
47 Vec::with_capacity(count.try_into().expect("`N` failed to convert to `usize`"));
48
49 let err_code = f(&mut count, data.as_mut_ptr());
50 if err_code != vk::Result::INCOMPLETE {
51 err_code.result()?;
52 data.set_len(count.try_into().expect("`N` failed to convert to `usize`"));
53 break Ok(data);
54 }
55 }
56}
57
58pub(crate) unsafe fn read_into_defaulted_vector<
72 N: Copy + Default + TryInto<usize>,
73 T: Default + Clone,
74>(
75 f: impl Fn(&mut N, *mut T) -> vk::Result,
76) -> VkResult<Vec<T>>
77where
78 <N as TryInto<usize>>::Error: std::fmt::Debug,
79{
80 loop {
81 let mut count = N::default();
82 f(&mut count, std::ptr::null_mut()).result()?;
83 let mut data =
84 vec![Default::default(); count.try_into().expect("`N` failed to convert to `usize`")];
85
86 let err_code = f(&mut count, data.as_mut_ptr());
87 if err_code != vk::Result::INCOMPLETE {
88 data.set_len(count.try_into().expect("`N` failed to convert to `usize`"));
89 break err_code.result_with_success(data);
90 }
91 }
92}
93
94#[cfg(feature = "debug")]
95pub(crate) fn debug_flags<Value: Into<u64> + Copy>(
96 f: &mut fmt::Formatter,
97 known: &[(Value, &'static str)],
98 value: Value,
99) -> fmt::Result {
100 let mut first = true;
101 let mut accum = value.into();
102 for &(bit, name) in known {
103 let bit = bit.into();
104 if bit != 0 && accum & bit == bit {
105 if !first {
106 f.write_str(" | ")?;
107 }
108 f.write_str(name)?;
109 first = false;
110 accum &= !bit;
111 }
112 }
113 if accum != 0 {
114 if !first {
115 f.write_str(" | ")?;
116 }
117 write!(f, "{accum:b}")?;
118 }
119 Ok(())
120}