1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
#[cfg(not(feature = "std"))]
use alloc::{boxed::Box, vec::Vec};
use core::{fmt, marker::PhantomPinned, pin::Pin, slice};
pub struct OwnedFace(Pin<Box<SelfRefVecFace>>);
impl OwnedFace {
pub fn from_vec(data: Vec<u8>, index: u32) -> Result<Self, ttf_parser::FaceParsingError> {
let inner = SelfRefVecFace::try_from_vec(data, index)?;
Ok(Self(inner))
}
}
impl fmt::Debug for OwnedFace {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "OwnedFace()")
}
}
impl crate::convert::AsFaceRef for OwnedFace {
#[inline]
fn as_face_ref(&self) -> &ttf_parser::Face<'_> {
self.0.inner_ref()
}
}
impl crate::convert::AsFaceRef for &OwnedFace {
#[inline]
fn as_face_ref(&self) -> &ttf_parser::Face<'_> {
self.0.inner_ref()
}
}
struct SelfRefVecFace {
data: Vec<u8>,
face: Option<ttf_parser::Face<'static>>,
_pin: PhantomPinned,
}
impl SelfRefVecFace {
fn try_from_vec(
data: Vec<u8>,
index: u32,
) -> Result<Pin<Box<Self>>, ttf_parser::FaceParsingError> {
let face = Self {
data,
face: None,
_pin: PhantomPinned,
};
let mut b = Box::pin(face);
unsafe {
let slice: &'static [u8] = slice::from_raw_parts(b.data.as_ptr(), b.data.len());
let mut_ref: Pin<&mut Self> = Pin::as_mut(&mut b);
let mut_inner = mut_ref.get_unchecked_mut();
mut_inner.face = Some(ttf_parser::Face::from_slice(slice, index)?);
}
Ok(b)
}
#[inline]
#[allow(clippy::needless_lifetimes)]
fn inner_ref<'a>(self: &'a Pin<Box<Self>>) -> &'a ttf_parser::Face<'a> {
match self.face.as_ref() {
Some(f) => f,
None => unsafe { core::hint::unreachable_unchecked() },
}
}
}