opencv 0.53.2

Rust bindings for OpenCV
Documentation 
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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

use std::ffi::c_void;

pub trait Boxed: Sized {
	/// Wrap the specified raw pointer
	/// # Safety
	/// Caller must ensure that the passed pointer is pointing to a valid unowned object data
	unsafe fn from_raw(ptr: *mut c_void) -> Self;

	/// Return an the underlying raw pointer while consuming this wrapper.
	///
	/// This will *not* free object referenced by this pointer so you can use this pointer indefinitely. Be sure
	/// to free it (by e.g. calling `from_raw()` with the same wrapper type) to avoid leaking memory.
	fn into_raw(self) -> *mut c_void;

	/// Return the underlying raw pointer.
	///
	/// You can use this pointer as long as the original object lives. Be careful not to double-free it.
	fn as_raw(&self) -> *const c_void;

	/// Return the underlying mutable raw pointer
	///
	/// You can use this pointer as long as the original object lives. Be careful not to double-free it. Note
	/// that ownership is still retained in the original object. Use `into_raw()` if you want to transfer
	/// ownership to another wrapper.
	fn as_raw_mut(&mut self) -> *mut c_void;
}

#[macro_export]
macro_rules! opencv_type_boxed {
	($type: ty) => {
		impl $crate::traits::Boxed for $type {
			#[inline]
			unsafe fn from_raw(ptr: *mut std::ffi::c_void) -> Self {
				Self { ptr }
			}

			#[inline]
			fn into_raw(self) -> *mut std::ffi::c_void {
				std::mem::ManuallyDrop::new(self).ptr
			}

			#[inline]
			fn as_raw(&self) -> *const std::ffi::c_void {
				self.ptr
			}

			#[inline]
			fn as_raw_mut(&mut self) -> *mut std::ffi::c_void {
				self.ptr
			}
		}

		impl $crate::traits::OpenCVType<'_> for $type {
			type Arg = Self;
			type ExternReceive = *mut std::ffi::c_void;
			type ExternContainer = Self;

			#[inline]
			fn opencv_into_extern_container(self) -> $crate::Result<Self::ExternContainer> {
				Ok(self)
			}

			#[inline]
			fn opencv_into_extern_container_nofail(self) -> Self::ExternContainer {
				self
			}

			#[inline]
			unsafe fn opencv_from_extern(s: Self::ExternReceive) -> Self {
				Self::from_raw(s)
			}
		}

		impl $crate::traits::OpenCVTypeArg<'_> for $type {
			type ExternContainer = Self;

			#[inline]
			fn opencv_into_extern_container(self) -> $crate::Result<Self::ExternContainer> {
				Ok(self)
			}

			#[inline]
			fn opencv_into_extern_container_nofail(self) -> Self::ExternContainer {
				self
			}
		}

		impl $crate::traits::OpenCVTypeExternContainer for $type {
			type ExternSend = *const std::ffi::c_void;
			type ExternSendMut = *mut std::ffi::c_void;

			#[inline]
			fn opencv_as_extern(&self) -> Self::ExternSend {
				self.as_raw()
			}

			#[inline]
			fn opencv_as_extern_mut(&mut self) -> Self::ExternSendMut {
				self.as_raw_mut()
			}

			#[inline]
			fn opencv_into_extern(self) -> Self::ExternSendMut {
				self.into_raw()
			}
		}
	};
}

#[macro_export]
macro_rules! boxed_cast_base {
	($type: ty, $base: ty, $extern_convert: ident $(,)?) => {
		extern "C" { fn $extern_convert(val: *mut std::ffi::c_void) -> *mut std::ffi::c_void; }

		impl ::std::convert::From<$type> for $base {
			#[inline]
			fn from(s: $type) -> Self {
				unsafe { Self::from_raw($extern_convert(s.into_raw())) }
			}
		}
	};
}

#[macro_export]
macro_rules! boxed_cast_descendant {
	($type: ty, $descendant: ty, $extern_convert: ident $(,)?) => {
		extern "C" { fn $extern_convert(val: *mut std::ffi::c_void) -> *mut std::ffi::c_void; }

		impl ::std::convert::TryFrom<$type> for $descendant {
			type Error = $crate::Error;

			#[inline]
			fn try_from(s: $type) -> $crate::Result<Self> {
				Ok(unsafe { Self::from_raw($extern_convert(s.into_raw())) })
			}
		}
	};
}